all right we are going to get started hello everyone virtually and in person um I appreciate everyone taking the time for making it today on this very snowy blistery day but I appreciate it um I am going to get us started and I'll be handing it off to our presenters for the day so give me a moment I'm going to share my screen oh it's already sharing my screen okay virtual folks are you seeing my presentation or are you seeing my presentation notes oh yeah that's what I was HED up okay sry I don't like it doesn't recognize this as a different screen okay so I'm just going to you're all virtual people are just going to see my notes I hope that's okay okay great all right thank you and welcome everyone to Energy Efficiency analysis performance optimization with r screen my name is is Miranda Wright I'm the education and engagement manager here at Illinois Green uh thank you uh again for all of you who've uh fought the snow and for all of you who are able to join us virtually um you are in a zoom meeting so I do ask that virtual participants just keep yourselves muted throughout the presentation portion there will be time to um discuss and have open dialogue so uh feel free to unmute yourselves then for those of of you who are unfamiliar Illinois Green Alliance is a membership driven nonprofit organization that advances green buildings and sustainable communities for all our 5-year strategic plan pushes the green building industry to meet or get on the path to Net Zero we achieve this work through educational events uh such as panels and building tours by engaging communities and partnering with organizations across Illinois and by advocating for new policies and legislation I also want to take a moment to recognize Illinois Green alliances sustaining sponsors who make our work possible a special thank you to our gold level sponsors ComEd usgbc and Sloan and with that I'm going to go ahead and pass it over to our Bowman consultant team to introduce themselves and get you all started okay there we go good afternoon everyone uh thanks Miranda for the introduction um so my name is hardik miani and I'm currently working as energy and decarbonization project manager with bman Consulting uh so our firm is currently based in Chicago Washington DC and Frankfurt office in Germany where we work on a lot of sustainability uh Energy Efficiency uh commissioning um and building performance analytics um simulation softwares uh for our projects uh so along with me I have htin charet from Washington DC office who will be also providing us with a training for the red screen software today uh so before we get started uh if we can please introduce ourself and also U mention like how much how many years of experience do you have in the Energy Efficiency domain it will help me to cater the presentation for today yeah uh doing a lot of like mechanical system decarbonization work uh I've only been in the industry for five months so this is still very new to me decided to learn about more tools that I can use nice both in uh that field and Beyond okay yeah I'm suy um I do independent research my University um I I my background is in computer science M uh I've been interested slash kind of doing adjacent research for the last three months nice very okay yeah uh my name is Kyle bondre I'm an electrical engineer of Smith group um I have about eight year eight years experience in electrical design but not much experience with um Energy Efficiency nice okay uh people on Zoom call Matt if you could please introduce can people on Zoom call hear me okay I think the audio is mute but uh I think uh not to further delay for today we we will get started with the training for the red screen so first I will start with the overview about red screen uh what red screen software is and where it is being used in the industry okay I think the people who are seeing my screen should be able to see that okay uh so the agenda for today we will be learning about the red screen overview what the software is about what are the application of the software where I where we can use this software uh the limitations we will be going through a few case studies uh and also answering any question answers that we have for this uh software training uh starting with the overview uh so red screen oh okay perfect yeah perfect thanks yeah red screen as a name suggest uh it is known as renewable energy technology screening uh this is a software that is developed by the Canadian government uh similar to like the in United States we have Department of energy uh in Canada there is Natural Resources Canada who has developed the software so this is a clean energy management software that is widely used in Canada uh and across the globe for energy efficiency renewable energy or Co generation feasibility analysis for any of your energy performance analysis uh project uh so this software helps to quickly gauge facilities energy performance like how it is currently performing against another property or if you have any project where you want to do a feasibility analysis whether this is a good solution for that project or not or if you want to do a cost analysis saving analysis if you have a project where you want to do a quick estimate like what is a ghg emission reduction uh so everything is possible with this software uh again it can also be used for deter mining what is energy production uh the savings potential um across any place in the globe uh it is also used to verify the performance of the implemented projects like suppose if you are working on any retr commissioning or commissioning based projects this is also a place where you can verify do measurement measurement and verification with the utility bill analysis and confirm if what is a reduction in the energy saving and again if you have a wide portfolio of projects right if you have a client that has multiple buildings and they want to do a portfolio level analysis how is each building performing at their portfolio that is also capability that red screen provides um through its simulation uh so the red screen is currently available in 38 languages across the globe uh that covers almost two3 of the world population so be it in Africa in India in Russia any place you can people are using red screen software uh so these are the developers uh and partners who are associated with red screen who have helped them to build the software as I mentioned the Natural Resources Canada is very similar to the United States Department of energy out there in Canada uh who who who has partnered with red screen to develop this uh other uh Partners includes the renewable energy and Energy Efficiency partnership the independent Energy System operators United Nations envir program and NASA um so all these all these firms are directly or indirectly helping red screen like for any analysis that we do we need a u we need the um the ambient temperature and the weather data right so that is a place where NASA they fetch the information from the NASA Nas NASA satellite for grabbing all those information so we need information about the groundwater as well so that is a place where they collaborate with all the developers and partners for doing all the simulation work uh application of the software so at a high level red screen is widely used in the industry for multiple aspects starting with virtual energy analyzer like suppose if you're going on a site Vis it it the client needs a very high level estimate like what is energy saving potential for that particular property right so that is a place I will use Virtual energy analyzer so that is the software itself has the archetype which means sort of a dummy model like suppose if I'm doing an audit for a warehouse I will use a dummy model and see like like what is the energy saving potential with the lighting retrofit and that is something that can I can potentially do without Gathering too much of information about the property benchmarking analysis as everyone knows benchmarking is specifically used to compare how is how is my building performing as compared to other building in the similar location of similar size right so right now we do everyone knows about energy Star portfolio manager which is widely used in the industry in United States and Canada but what if my project is currently located in Africa right there is no benchmarking for that so that is a place red screen comes in place right uh so red screen has a very good database across the globe like suppose be any project in any part of the world they have a benchmarking like if I uh um create a virtual model about my software I will be able to analyze how my building is performing as compared to another property for the same location feasibility analysis again it is used for clean energy soft projects uh if I want to do a feasibility analysis whether electrification is possible or not right uh if I upgrade my Windows from double pin to Triple pin Windows whether it is feasible or not so feasibility is not only from technical perspective it is also the financial feasibility the cost analysis ghg emissions everything performance analysis again this is something used for R commissioning and monitoring based commissioning for energy performance Contracting where you have the utility bills for the client right now and after implementing the measures you will see a reduction so what is that actual reduction is something you can determine using red screen and portfolio analysis that you can use for property for any client that has multiple buildings across the portfolio again these are the applications that where the red screen is currently used it is used in power plans the power heating cooling industry uh Power storage and off grid like if you have any battery storage thermal storage and you want to do a feasibility analysis you can use that industrial and agricultural industry that is a place where if you install um like if you fix a or upgrade a motor right so that is a place where you can do a feasibility analysis how much is a savings potential commercial institutional this is very similar to the energy audit that we do uh residential again similar to that like if I um install a solar PV panel on my roof like what is the energy generation possibility what is a financial associated with that and that is the analysis that we can do and transportation is a place where you can estimate what is the GG emissions from the different modes of transportation so as any software red screen has few limitations that it takes into consideration while doing the analysis first uh it is a degree day simulation model um second and it does not include latent load in the uh calculations so there are two types of loads uh latent and sensible so sensible is something like if there is a change of temperature if I ask do this space temperature needs to change from 72 to 75 that is a sensible load right but latent load is something where there is a change of phase if I'm transitioning from Ice to water or water to steam that is a place where I'm changing the phase phas of a particular uh material right that change of phase is not taken into consideration while doing red screen analysis simultaneous heating cooling is not covered in red screen right if there is a place where there is a cooling that is coming into this space and there is a electric heater that is on so red screen can't do a comparison of like there is a simultaneous heating cooling happening in the space uh occupant sensible heat sensible and latent heat gains are not taken into consideration um it can only estimate what is the heat being rejected by the lamps or if there is electrical equipment or from the sensible loads but it cannot take like if there are it depending upon the occupancy in the building it cannot determine what is the sensible latent load rejected by the occupants in this space um it cannot specify when during the day building is occupied so over here we will be learning uh like we can certainly specify the operating hours like suppose if I say this space is occupied for 12 hours per day right red screen will consider that 12 hours but it cannot say it is it is um operating from 9:00 a.m. to 9:00 p.m. right so it will take into consideration the total hours but not the actual time duration when it is operating power factor correction is not taken into consideration uh while doing the analysis and last it does not calculate the reduction in the peak demand the major Focus using this software is reduction in the energy and not on the peak demand um so now we will get started with the software itself uh how to use the software what are the features that are available and I will be diving into each and every different example uh so that it will help you guys to get trained for that but before we get started uh this are few cell color coding that we need to remember while working on red screen software so any cell that is in white color is a place that is a model input that is calculated by the model that is um done by the red screen software yellow is a user input and it is required to run the model until and unless we don't fill in the cell in yellow we won't be able to do the calculation the one in blue it is required to run the model and there are online databases available if I come across a situation where I need to input the efficiency for a particular boiler but I don't know what the efficiency is so there is database that is available that I can take as a reference and that can be used as a um analysis for my software uh gray is the user input for which is for only for reference only and it is not required to run the model so you can skip those part while working on the model so whenever we approach any Energy Efficiency project uh the first thing that we need to understand what are the fuel sources in the building right is it an all electric building do they have natural gas that they are using for heating do they have any source of diesel or oil that they are using for any sort of generation in this space so that is the first thing that we will be um using when whenever we are working on any Energy Efficiency project right once I understand the fuel sources next I need to understand what are the major equipments in the building right chillers boilers furnace domestic hot water absorption chillers heat pumps those are the major equipment that are being used in the building right next I will be developing what are the end users I have this equipment what area it is serving right so we will be having lighting we have the ventilation uh we have the pumps fans Motors uh electrical equipment so those are the things that we will be so once we develop the Baseline case for the model so so that is like suppose if I'm doing an energy audit for this case so this is something we will consider as an example throughout a project if I am an energy auditor right I will be coming into this space I will be looking what are the Baseline system in this building right so I will count the number of lamps I know there are few electrical equipments right I will understand what are the thermal properties of this building construction right um I will be looking into what are the thermostat set points what are what are the system that is providing Heating and Cooling in this space so those are my Baseline conditions right now as an energy auditor I need to identify how can I reduce energy consumption for this piece right so if this is a fluorescent lamp one opportunity is I can do a lighting upgrade right if there is a thermostat that is having a very weird set points that is a control upgrade right if I know this wall insulation is not good I can probably do a pH ibility analysis how much worth it is to add an extra layer of insulation if there is any air leakage that I identify through doors or windows that is the place where we can do a clocking we can estimate the Energy savings associated with that if I am using any electrical appliances that are not energy star rated right that is another place where I can recommend to my client like install uh energy star rated appliances so that is a place where we start with the minimizing the usage right once we understand the base load our first goal is to minimize the usage then we maximize the efficiency that is a place where we upgrade the equipment right if you come across there is a boiler that is being used for heating but everyone knows now that heat pump is much more efficient as compared to a conventional boiler system gas fired boiler so that is a place I'm maximizing the efficiency by replacing the equipment and after that anything that is remaining that is a place where I can potentially install a renewable technology to make my entire project Net Zero so the meaning of Net Zero Energy is the amount of energy that is being consumed by a particular space equivalent amount of that of energy you generating on site right so be it electricity if I know if I'm using 100,000 kilowatt of energy electricity annually I will be um generating an equivalent amount of electricity either on site or it could be I can buy renewable energy credits as well so there are multiple ways we could potentially make our project Net Zero so this will be the approach that we will be using uh throughout our um uh software training any questions so far okay hearing none uh so has everyone got an opportunity to install the software any difficulties faced anyone online oh sorry yeah okay okay so to get started so first I will be providing an overview about what are the um capabilities of the red screen software um so if you open the software this is how the dashboard will be looking like so you get started with selecting a blank project um since this project is developed by people in Canada it is all the um units of measurement is in metric system right so first thing we need to always remember whenever we are working on red screen software to ensure we are selecting proper metric system right one easy way to update all the settings is you go into the settings you can select the currency or first you can select your language whichever language you are comfortable working with I select English out here the currency if you have any Project based in United States you you can select USD by default it will be can considering Canadian dollars the dollar sign refers to the Canadian dollars but if you have a project in USD or any part of the globe you can select your currency accordingly units of measurement by default it will be metric if you have projects in United States I would suggest selecting Imperial out there um next is there is also an option for you to select a by default like a facility location as well like if you know like most of your projects will be based in Chicago you can select a uh software default where uh you can get started and next is the exchange rate ideally this will be automatically updated in your cost database but if you have a separate exchange range that exchange rate that you want to use use for any other projects outside USA this is a place where you can use it as a adjustment factor and yeah uh second over here out here in natural gas by default it considers cubic meter most of our natural gas bills in United States is based in thms so you can set that as a default and yeah so these are few uh default values that I would highly recommend updating in your software um so that every each time you open the software you don't need to make changes to your model okay so going back to the home screen so this is how the dashboard will be looking right so as we discussed there are multiple features in benchmarking we need to define the location and the facility type in the feasibility analysis we could do what are the energy saving itial we can do cost analysis emission analysis financial analysis risk analysis and in the performance tracker you can do data analytics and Reporting aspect of that anything related to the portfolio if you're working on portfolio based this is a place where you can find you can get started with uh this is a place where you can see where uh red screen is uh widely used in the industry one very good feature about red screen like suppose if you are using this software after this training right you will have multiple questions red screen has a very good e-learning database so all the training that I will be giving today it is um available on YouTube channel so anything related to energy efficiency work or if you're working on solar PB or wind turbines or um CHP analysis any any feasibility analysis that you want to do all the analysis I mean all the training material is available on YouTube that you can take it as a reference after this training and yeah these are few other stuff but to get started so has everyone received this worksheet red screen training worksheet so this is a worksheet that we will be keeping as a reference for our training today um so for our training so I will be teaching about the benchmarking how to do benchmarking in red screen we will be learning about how to do writing a retrofit we will be learning about HVAC like if there is any control measures yeah sry yes uh so if you select 180 guest and the password is North lasal get yeah no worries work yeah okay let me know once you have then I can get started 180 guest Lessa okay are we ready perfect okay so we will be learning about benchmarking uh lighting retrofit we will be learning about hbac system if there is any control upgrade that you are planning to do what is a savings associated with that we will be learning about installing vfds and learning about the financial analysis using that and then we will be learning about the building envelop aspect of that and later on hen will be training us about two case studies that I would like you guys to do on your own and at the end of the training we will be discussing what are the solutions and how to set up in red screen okay so to get started so first example for us is to Benchmark a property so we are responsible for conducting a walkth through energy audit at a commercial building located in Chicago okay so that's the first line so I will be so two things that I got to know from this one it is a commercial building second it is based in Chicago so what I will do is I will go into red screen software I will select all I mean it depends since I will be doing multiple um training I mean today so I will select all but if you are working specifically on benchmarking you can select only benchmarking if you're working only on visibility you can select visibility But alls gives like opens all the tabes for you so starting with the location we know it is based in Chicago so we will select this globe icon out here and that is a place where I will select Chicago I will type in Chicago and select search so what uh sorry one second so now based on my location red screen has recommended multiple weather stations that are close to my location right so it includes the Midway Airport uh the magnificient field the Gary Chicago Chicago o Glen View depending upon what I want I can select anyone I'm assuming it is currently based in Chicago downtown so I'm selecting the second option out here so once you select that select yes out here paste data and automatically all your weather files will be updated so this is a place where all the weather file it is importing all the weather files for your simulation let me know if I need to reduce the pace I I can adjust according so over here the weather information that it captured was the ambient temperature humidity precipitation solar radiation atmospheric pressure wind speed he Heating and Cooling degree days so all this information will be used for doing the analysis and this is the climate data it is just plotting a graph how the weather is for the city of Chicago uh so now I have loaded my weather file next they have asked it is a commercial uh building right so I will go into the facility tab so now in the facility type we know it is a commercial building so I will in the drop down I will select commercial and institutional and it is an office building so I will select office building and as we mentioned everything in yellow is required so this is a place where you can write um I mean it won't be used for your analysis but just while you creating a report that is a place where all this information will be used if you want to write anything anything in Gray it is not required it is an optional but if you want to create a report this is a place where you can write down the address and all the stuff you can certainly update the image as well you go into the select image this is a place where you can select any property images specific for your project and change the uh Graphics out here okay so next step in the process it is a the size of the facility is 10,000 square ft so I will enter the facility size 10,000 square ft right next last year the building consumed 10,000 thms of natural gas and 105,000 Kow of electricity so in red screen there are two ways you can do benchmarking that is known by level one and level two the higher the level the more detailed information you need to provide for your analysis so level one includes like a high level benchmarking I don't have electricity and natural gas split I at a I know the overall kilowatt hour per square feet or eui for the property so that is a place where I will use level one but based on the information that red screen has provided it is they have given us a split between natural gas and utility so that is a place we will go into level two right so that is a place uh so I know for electricity it is 105,000 and for natural gas again always remember the uh metric system out here it is in cubic feet cubic meter sorry but we need it in thms so it is 10,000 THS right okay so now red screen has estimated the eui for my property directly so my eui for electricity is 10.5 and for natural gas is 29.3 overall for my building it is 39.8 does it make sense okay now the client has set a Target like they want to have a energy reduction for natural gas by 10% and electricity consumption they want to reduce it by 20% okay so now that is a place where I set a target for electricity it is 20% and for natural gas it is 10% so that is a place where I can determine so this is my base case that is a place where how my property is currently consuming and this is the Target that the client wants to achieve right so how much energy do I need to reduce that is a place where red screen can give us an analysis about that right so my proposed case will be having this uh energ eui for the property now suppose if I come across a property that is based in Africa I don't have a database I don't know how the building is currently performing right so what I will do is assuming I have the eui for that property assuming it is 39.8 what I can do is I can go into the level one my base case that my building is currently performing is sorry what was 39.8 so what I will my base case is 39.8 so that is how my building is currently performing now I don't know how my building is performing against any other properties for that location so what I will go do is I can go into the Benchmark database so red screen has created a very good database um for all the properties across the globe uh so that is a place what I will do is I will do a reset I will select the location where I want to compare my property against so what I will do is I know my property is based in United States and it is in the mid Midwest region right so I will select Midwest second thing that I know my um my building is a commercial building right so the facility type for me is a commercial or institutional right and out here I know is an office building so there are two benchmarking database that I have that I can refer on again depending upon my location for the property I will select either East or West whereever my project is located for now I will assume it is 213 kilow R per square meter again look into the Matrix it is not square feet it is square meter right so it is 213 so what I will do is I will take that as a reference uh since this is asking in square feet what I can do is I can change this this to square meter for temporary I can make this 213 that is my Benchmark and again change it back to square fet so this gives me a good understanding my building is currently consuming 39.8 kilowatt hour per square feet for any other property in the same location of the same type it is consuming 19.7 n this gives me a good understanding there is a very good energy saving potential for my property so I can start with energy audit does it make sense any question so far uh you go into the location that is a place where you change benchmarking oh yeah so you go into the Benchmark database yes and that is a place where depending upon the location type of facility so there are multiple filters uh there was also a filter where you can select the age of the building as well that could be one of the factor uh area of the building so there are multiple factors uh that you can use to determine uh benchmarking uh so now I know my building is out here it is currently consuming sorry this is yeah so my building is currently consuming 39.8 that is my Baseline and the T The Benchmark that I have is out here now client sets a goal I want to reduce by only 20% I don't want more than that so that is a place where I can show to the client like this is the energy saving potential for your property and if they want to reduce it with the benchmarking that is they need to make a reduction of 50% to meet the benchmarking requirement and if they want to go Net Zero it's like a complete reduction in the savings right or whatever they are cons assuming it needs to be zero out there so accordingly you can use this graph for your reporting as well to show to the client how it is currently performing there is also an option where you can keep a track of their uh emissions Benchmark as well uh and the cost Benchmark as well how much electricity or natural gas electricity cost rather utility bills that they are paying against other um properties so this is all for sorry there are a few other things other information that they have provided now is a facility this same facility is currently paying $1 per thumb for their natural gas bills right so now we know okay first thing we did was benchmarking we understood the building has a very good potential for doing Energy savings right now next step I will understand what are the fuel sources we know electricity and natural gas based on the information provided so what I will do is I will now go developing a virtual model about this building so I will go into the Energy tab I will select electricity and fuels and that is a place where I can Define what are my fuel sources in this building okay so for me I have a natural gas and it is per thumb and they have provided it is $1 per thumb so I will select that and for electricity I'm currently the uh client is paying 14 cents per kilow right now suppose if you come across a client who doesn't want like a marginal rate they want they want a very detailed utility bill analysis so that is a place where you select this icon the electricity rate calculator and you can do a very detailed analysis month by month what is my electricity being consumed what is my Peak load what are my fixed charges what is the total electricity cost that they are paying and accordingly red screen will help you to estimate what is the Blended cost that you can and again there are multiple ways you can estimate one is the first option is on a monthly basis second is time of the use at what time what is my electricity rate usually if you see in the ComEd Market the cost for electricity changes throughout the day like during afternoon the price of electricity is more during evening time it is less so that is a place if you have the client who wants you to do a very detailed analysis this is a place where you could potentially use um same if there is any advanced version depending on how detailed the client would would like you to go this is a place where you can use red screen and if you have any other fuel sources apart from electricity and natural gas this is a place where you select plus sign and you can select any other fuel sources as well for your property in this case since we have only electricity natural guess I will remove anything extra so I'm deleting that good until you okay next they ask the building thermostats are currently set for 68 for heating and 72 for cooling and it is operating 24 hours per day if you come in this space you saw the thermostat Set Point Heating is 68 cooling is 72 and it is operating all the time no matter what whether the building is occupied or not the systems lights everything will run 24 by7 so I will go into the schedule that is a place my heating is at 68 cooling is 72 and my change over temperature out here they have given it is 65 the meaning of change over temperature is what is the ambient temperature at which my system changes from heating to cooling mode or cooling to heating mode so ideally it is in the range of 60 to 65 the way we determine there needs to be like a detailed utility bill analysis that gets done but for now we will assume it is 65 by default red screen gives you like the your model is operating 24x7 but if you come across a property where the operating RS are different this is a place where you can set a new schedule you can Define whatever schedule you want whatever the occupied and unoccupied set points you have and the number of hours it is operating on a daily basis right you can use this schedule as well for now we won't be using that so this is the first part of the example that we have done so we learned about how to set up a facility type we learned about how to set up a location we learned about the benchmarking level one and level two right uh how to set a target for the facility uh what are the fuel sources and how to do the rate analysis and how to set up set points for the building any questions so far yes is the only difference between yes yeah for level one it is combined for the entire building it doesn't matter if it is electricity or natural gas at a whole how is your building performing but if you want to dive deep into specifically for electricity the client is looking for 10% reduction natural gas 5% that is a place where you need to use level two analysis yes yes it does so if you that will something I will be showing but uh since you already asked if you right now it won't show up because we haven't developed our model yet but uh I will be showing in next few uh minutes of about the emission and how it takes it does but it does take into consideration the source of electricity based on the utility or the location of your project yeah okay so now we will be going into uh anyone on Zoom call who has any questions how do I see okay here sorry anyone any questions can you please repeat the questions as asked oh okay sorry uh the question um that was asked by one of the attendee out here was um for the benchmarking I think the question was sorry yeah difference between level one and level two analysis so level one is specifically if you want to do benchmarking at a property level doesn't matter how uh like I mean the client doesn't doesn't have electricity and natural gas separate goals in terms of Energy savings that is a place where you use level one level two is like you want to dive deep into each source of energy for electricity natural gas if you have any other source and you know the fuel consumption you can accordingly at each uh fuel source you can Benchmark your consumption okay uh now we dive into the second part that is now you are in this space now you saw there is a very good uh energy um optimization opportunity for this space the first thing that you identified all the lamps out here are hogen one easiest way to do it upgrade to LED right so for our of for our project we have an office space in the building is lighted with hogen fixtures you are proposing to switch to LED so now the client is asking what is the energy saving associated with that right how what is my payback that this will be the question that the client will be concerned about right so now we will be doing that analysis so in our base case we have 20 hogen pot lamps that each of 40 Watts it is operating for 12 hours per day and we need to set the heating cooling impact to zero so I will be explaining what that means so we go into our red screen file we go into the Energy tab we go now light liting is one of the end uses in the building right so what I will do is I will go into the Energy tab I will select lights okay so I'm I will give a name like I'm doing a lighting upgrade right um so now again in lighting there are two ways you can estimate savings first is by if you have whatt per square feet for the space uh that is a place where you can estimate what is the reduction in per square feet in our case they have given the exact count of fixtures right so that is a place I will go into the level two analysis so in this case I will assume uh there is no illumination level that is required in this uh so that is something I won't be doing as part of this analysis but over here you can certainly depending upon what type of space you have what is so red screen gives you an estimate range of uh the the foot candle that is required in that space type and you can select for the two different case hogen versus fluorescent or LED uh how is what is the difference in my foot candle or illumination level in this case we won't be doing that it is not required for our analysis today so in our base case we have a hallogen lamp again uh the electricity load per lamp so they have given it is a 40 watt per lamp they haven't mentioned anything about miscellaneous losses so I will assume it is zero the number of fixtures that they have mentioned there are 20 hogen lamps so there are 20 lamps and it is operating 12 hours per day right so now this gives me what is the electricity being consumed by hogen lamps that is operating for 12 hours per day it is consuming 4,380 kilow hours of electricity annually right in the question they have asked like set the heating cooling impact to zero as everyone knows whenever a lighting lighting is not 100% efficient any lighting that you have it gets certain percentage of that gets converted into heat right and that heat impacts the overall heating cooling load for your building if you are in your summer summer months it will impact your cooling load right because now the space the chillers needs to do more work to do provide cooling into the space but if you are in summer sorry in Winter it will be used for heating the space so in our red screen they have asked to make it as zero we are assuming the hogen lamps has no impact on your heating cooling load that is what we are considering out here in our proposed case they have asked we are upgrading this to LED so I will consider LED my proposed case we are replacing it with a screw in type uh 8 wat LED lamps so my wattage per lamp is 8 watts miscellaneous loss is zero I'm assuming it's at same quantity and it is operating for same hours so now red screen give me a quick analysis what is my energy saving associated with lighting upgrade so we are reducing by 84% right another thing that given is incremental cost for replacement they have given it is $300 uh lamps and labor so that's the total cost for implementing that measures so that is a this is a place where you can include your cost that is the initial cost for implementing the measure and if there is omm cost that is a place where you can enter out here and so if you go into the uh include measure tab this is a place where you get the overall summary in terms of what is my electricity saved uh what was my cost for implementation what is my fuel cost savings that is my utility bill savings and what is my Payback right payback of 6 for this lighting upgrade and if you go into so there are multiple ways you can see like what is my energy consumed in my base case and energy saved yeah energy saved is this one this is my base load consumption right this is for my proposed case okay you go to include measure yeah yeah and depending upon what you want to look energy and fuel fuel is taking into consideration the efficiency of the equipment okay over here I'm I want to estimate what is a savings so this is my report that I can share with the client like if you want to do a lighting upgrade over here this is a payback this is the energy saving and the cost savings associated with it a quick analysis right any questions anyone okay on okay um so this is a place where all the questions like what is our savings savings is 3679 what is the dollar savings it is 515 for the fuel cost and my payback is6 years okay third part is now hbac okay so this space is cool P by a rooftop unit um um it has a furnace that is having a seasonal efficiency of 80% it is a gas fir fired furnace and they have a compressor that is having a seasonal cop of three right and they have given multiple information in terms of how this rooftop unit is working how how much air flow it is bringing and multiple information so now we will be setting up the HPS system so they have mentioned it is providing ventilation so what I will do is first they given there is a furnace so I will what I will do is that is a type of equipment for us right so I will go into the heating so these are the different equipment that you can select for heating right depending upon project that you work it could have heat pumps it could have water heater uh it could have a boiler it could have District heating depending upon what your source for heating is you can select in our case it is a furnace um it is a natural gas fired furnace and they have mentioned like the seasonal efficiency is 80% right now suppose if you go on an energy audit you don't have this is something that we see many times right like if you go into a old building they don't have drawings the building engineer doesn't know what the efficiency is or they don't have the name plate picture as well so how do we estimate red screen has a very good uh database like if you select this seasonal efficiency that is a place where they have given sort of a reference that you can use uh you can select this the one in blue and it gives you a very good estimate like a range that you can consider depending upon what type of system you have depending is it a standard mid efficiency high efficiency is it a electric resistance is it a heat pump air source or ground source so they have given you a good range of um efficiency that you can consider for your analysis so in case they have already given 80% but if you work on any energy audit project you don't know you can take this as a reference to get started with another thing to consider uh yes no worries yeah yes so if you select seasonal efficiency yes and there is a blue hyperlink uh that will take you to that table another thing like if you come across a project or rather red screen you don't know what is the in what is the information that they looking for so for each tab rather each uh text they have given a definition about it so if you want to understand what it means what information that screen is looking for for your analysis you can read um description about that and if you have energy audit project where you want like the client is looking for detailed information you can also specify about the manufacturer model number number of units again since the cells are in gray color it is not taken into consideration for your analysis but to be I mean if your seniors are reviewing your work they can uh take this as an example from where did you get this information right there could be places where you got um this information from an online source and you want to save that document you can select show notes and that is a place where you can type in all the link or anything as a reference for future records so in our case we have a seasonal efficiency of 80% we have a compressor that is a cop of three so I will go into the cooling I will select again there are multiple types of ways we can do cooling I will select a compressor it is electricity and it is a cop so I will select so there are two ways efficiencies is rated in for cooling equipment either SE or cop in our case it is cop and I will consider three right so I have set up my equipment I have set up my rooftop unit so this is the for rtu and this is the furnace for rtu right so I have modeled my rooftop unit now now they have asked us to estimate what is the energy consumed by this rooftop unit for this space right so what I will do is the building is cool to 72° fahit on the same schedule as the heating so cooling set point is 72 the schedule is same as heating so I will assume it is operating 24 by 7 the rooftop unit has a air flow capacity of 5,000 CFM and provides ventilation Heating and Cooling as required okay so what I will do is I will go into the end uses energy ventilation and since it is 24 by 7 I will assume it is 24 out here it is supplying a total of 5,000 CFM right and it is providing Heating and Cooling both right that is what is provided in the information out here so over here in the system selection it is providing Heating and Cooling right we the rooftop unit is providing 20% Outsider right so the fresher intake is 20% of 5,000 over here they asking in percentage so I will just enter 20% out here okay the fan is driven by a 5 HP motor so in this ventilation calculation the rooftop unit I mean red screen can only estimate what is a heating cooling energy consumption by the rooftop unit it cannot estimate what is a fan energy consumption I mean the fan motor energy consumption so for that we need to do a separate model so what we will do is that is a separate end use so we go into to the Energy tab we are now setting up a fan for that rooftop unit right so this is a fan it is a 5 HP uh no need for manufacturer model number load Factor now they haven't given anything about the load factor I don't know what should I consider so what I will do is I will select what is red red screen typical values right so as for red screen the typical range is in the range like 60 to 75% the user should enter Z 100% if the motor is operating at a rated capacity during the operating house I will assume it is not operating at rated capacity I will assume as 65% uh load Factor depending upon what type of fan blade we have um there are multiple options that is something we should be looking into the uh spec sheet efficiency again I don't know efficiency for that fan so I will go into the typical values and depending upon what type of fan blade I have selected out here I can assume in the range of 60 to 70 so I will assume average of those 65 right and set the heating cooling impact to be zero right next it is the fan and ventilation operates 24 by 7 that is a constant volume right so it is operating 24 hours and it is a constant flow right so this is something is my Baseline energy consumption for the model for the supply fan motor right and this is for the heating and cooling being done by the rooftop unit two separate things right um over here they have also told uh the dampers have a medium leakage um so the intake damper the outside that it brings in it is having a medium leak cage out here and the heat there is no heat recovery so I will assume this is zero another thing that they have mentioned it is a constant fan control for the ventilation so both are constant another thing that we we haven't considered is a system reheat system reheat is suppose if you have a rooftop unit and before it enters the space there is a small terminal unit like variable air volume fan powered boxes with3 heat so those are the different types of terminal units that adjust is the amount of air flow and the heating cooling supplier depending upon the thermostat set points right suppose if you have a rooftop unit that is serving two spaces this one and the other one this is calling for cooling the other one is calling for heating right the roof what will rooftop unit do in that case it will always Supply at 55 but the VAV out here that the terminal units there is a reheat coil attached with it so it will adjust the supplier based on the set points that is there in the space and for that one it is is going the cooling mode so that is the question out here is there a reheat in your terminal unit or not right so in our case they have never they have not given anything about the terminal unit so I will assume there is no reheat happening at my terminal unit level so this is my um base load energy consumption again this is in kbtu okay so I've selected kbtu of energy consume and this is my base Lo Lo energy consumption any questions on how to set up uh HVAC system suppose if you have a makeup air unit makeup air unit is something that brings in 100% Outsider so in that case my fresh a will be 100% right same with the DOA system if there if you have a DOA system with heat recovery wheel that is a place I will have my heat recovery efficiency right if you have a uh terminal unit with reheat so that is a place I will set my system to be yes if you have a HPS system that is providing only cooling right so in that case I will select only cooling right so there are multiple ways you can set up depending upon how the design is for your property right so this is my base load energy consumption that I have set based on the information provided now in the proposed case I see the one as an energy audit I'm recommending if the space this is an office space it won't be occupied 24x7 why are you operating so like during unoccupied hours so what I will recommend to the client is why don't you implement uh scheduling measure right or Optimum start stop right Optimum start is everyone aware about Optimum start stop what it is no okay Optimum start stop is sort of a control measure where the building management system like the controls will decide what is the best time to start your system system okay so right now the way it is industry operates the building engineer who maintains the building he decides okay tomorrow the temperature is pretty cold let's let me start my system little at early like 4:00 a.m. it is based on guess or experience but over here Optimum start stop is something the controls will decide what is the best time to start it takes into consideration multiple systems so it takes what is the set point you want to reach what is the outside temperature right uh when is the building going to be occupied like at what time is are your tenants going to be in the space like suppose if you have this space where the tenant will be coming at 8: a.m. and you want the system to reach 72 de Fahrenheit by 8: a.m. right now the building management the controls will calculate what is your heating or cooling load what is my outside temperature and estimate what is a how much early do I need to start my system to reach 72° Fen by 8 a.m. right it could be sometimes it could be 1 and a half hour early it needs to start sometimes it could be 30 minutes sometime it could be 3 hours as right so depending upon what the saving I mean difference is you are saving energy instead of having a fixed start at 5:00 a.m. all the time now you are saving depending upon U the ambient temperature and the load in the build right so that is what we are implementing out here the building is occupied for 10 hours per day and six days per week right so what I will do is I will set a new schedule so I will go into the schedule Tab out here so my new schedule um it is um 10 hours per day and 6 days per week so it doesn't specify so six days is it from Monday to Saturday or Tuesday to Sunday red screen doesn't take that into into consideration it just just takes the total operating hours okay so I will assume it is Monday to Saturday it is operating 10 hours per day okay next modify the fan and ventilation control to operate according to the schedule that is six days per week and you will need to add a schedule okay that is something we done so now we set a new schedule and we want the ventilation to operate based on this schedule that is what they have asked to modify the control second measure that we are implementing out here is implementing a nighttime setback so usually during occupied hours the building has a set point of 68 and 72 but when there is no one in this space why should I maintain 68 and 72 degre Fahrenheit in the space right I could potentially make it like uh 60 and 80 for heating 60 and cooling 80 so I'm saving energy out there right I am not letting my system to turn on when there is no one in the building so that is something that we are doing nighttime setback so which means during night time I want my temp temperature to go on a safer side like conserve energy so they have asked to have a 4° of um dead band for that so my current set point is 68 so with 4° minus it will be 64 and for cooling side it will be plus so 72 is my current set point my proposed will be 76 oop sorry this is for the occupied sorry for my unoccupied it is uh 64 and 76 does this make sense any questions on this what is the meaning of nighttime sideb and why so the way the system operates let me give you a good example like suppose if this is a space my set point is 68 and 72 my space right now is at 65° fah what will happen I want my zone this space to be between 68 and 72 but right now it is at 65 what should happen should It Go in heating or cooling sorry right now it's 65 I want it to be 68 heating right yeah so I want my temperature to go up so what I will do is I will start my heating right the other way around if my set point is my space is currently at 76 but I want 72 what should happen cooling mode right I want to reduce my temperature so I will cool down between 68 and 72 it is known as satisfied condition which means there is neither heating or cooling happening it is just providing that much air right now in unoccupied right there is no one in this space I don't want to Main 68 right what I can do is I can save electricity and natural gas by changing my set points to be on a safer site so what I can do is I can reduce it to 64 so now what will happen between 64 and 76 my system is now not operating I mean it is so it is saving energy for me there Mak sense so only time my system will turn on is when my space temperature goes either below 64 or above 76 so that 8° of difference is the savings that I'm get getting for my electricity and natural gas make sense okay uh and the last measure that we have sorry now last information that we have is the cost for controls for implementing this entire controls is $3,000 um so first I will load all this information so we have on the proposed case for the ventilation it is on a schedule okay sorry one more thing in the schedule we we can't leave this as blank so Sunday enter it as zero or else it will give you error in your calculation so just enter this as zero out here so in your ventilation I want my proposed case like the solution that I'm giving to the client is implement this Optimum start stop sequence and also nighttime setback right it is for the same air flow same outside air there is no reheat it is providing Heating and Cooling and my dampers I haven't fixed my dampers and there is no reheat sorry no heat recovery rather so this is a savings associated with nighttime setback and implementing the um scheduling but again this is not everything do you know what is missing so we implemented the nighttime setback so we did heating cooling Energy savings but what about the ventilation for the fan motor we did not consider the reduction in the operating hours for the motors right so that is something we will be doing now so we go into the fans again same information it is at 65 but now it is operating at 60 hours per week initially it was operating 24 by7 so what I will do is I will select hours per week 60 hours so this is my fan motor Energy savings right the one that we saw in the ventilation it was Heating and Cooling savings the one I'm seeing in the fans is my fan motor savings does that make sense okay and if I want to show to the client like what is the total energy saved okay I I think we haven't included the $3,000 cost so that is my cost for implementing this control measure so I will go into the include measure tab and I will see um the overall uh payback for implementing lighting upgrade and the controls for my rooftop unit it is7 I'm saving 4,000 120 for heating okay this is in kbtu 14057 kbus for my cooling energy I'm saving almost 1,700 and my electricity savings is 1950 uh 19582 any questions on this how did we do like suppose if you have a client who is like I don't want to do lighting upgrade I just want to do controls what you can do is you can remove that measure and still get the savings only specific for one particular measure right or if there's a uh they just want to look at lighting savings so you can get a quick update from that right any questions can I see yes so the changes that we made in our proposed case is one is scheduling I'm assuming we implemented Optimum start stop and we also implemented the nighttime sideb so that is the heating in savings that I'm getting uh for my system uh just check your metric system as well is it in kbtu or any questions online does everyone online are they getting same answers or any different answers one thing that we missed out was what is the efficiency on my proposed case right so I'm assuming it's the same efficiency out here as well my furnace is same efficiency and same for my cooling load so that should be taken into consideration as well for interactive yeah that is something we will discuss there is one more thing but LEDs are you save up on electricity but that heat is being used by the space now keep the space why is is she getting negative Okay the reason for that if you go into the schedule you might have selected degre cius 80% so the question that we have in the audience out here they are getting negative savings probably because they haven't put the efficiency for the proposed case continue we havee stud session can discuss yes yeah uh one thing that I forgot to share so red screen as a software it considers interactive effects interactive means suppose if I'm implementing one of the measure what is the impact of that measure on the Energy savings for the other measure that I implemented like suppose if I implemented lighting upgrade it will change my heating cooling load right and now I'm implementing a controls measure for my rooftop unit so that will have an impact on my heating cooling load so so red screen takes into consideration if you're doing multiple Energy Efficiency project the total savings that you are getting is considering the interactive effect of all and not individual measure what is the influence of one measure on the other so it takes into consideration that okay so next we have is vfd for your pump system okay so there is a office space where there is a pump that is working on a constant volume now we want to do a variable volume and want to do a financial analysis associated with that so that is something we will learn so we will go into the Energy tab we will select the pumps so they have mentioned a 50 HP standard efficiency motor load factor of 75% so my motor is of 50 HP of standard efficiency and a load factor of 75% right my pump is 50% efficient variable flow pump operating 90 hours per week so my pump is 50% efficient it is operating 90 hours per week so what I will do is I will select the drop down per week 90 hours right they mentioned it is a variable flow type so what I will do is instead of a constant volume it is a variable volume right and they have mentioned it operates at a high flow range so my floow range is high and it is a throttle floor control R so I will select a throttling type so I got my Baseline energy consumption for my pumps so what is the difference between a high and a low flow range right so if you select flow range if the system is used most of the time below 50% of the full flow capacity the user should and select a low flow type otherwise it is a high flow type if a pump is designed to operate at 500 GPM and if it is operating at 100 GPM all the time like 50% of the time uh that is a place I will select a low and if it is operating above that it is a high right so this is my Baseline case now I the client is like no I want a variable frequency drive uh what is the savings associated with that and give me a financial report I'm not a technical person I want a financial analysis when I'm getting my payback what is My Equity what are the incentives available so I want a detailed analysis right so so in that case the client is like I want to change my pump to effic premium efficiency as well so I'm changing my pumps like upgrading my pumps to a premium efficiency motor so you see that the efficiency change from 91.1 to 94 again this is from the database that red screen has if you have the actual efficiency for the pumps or rather the motor you should be entering that to get the actual savings associated with it the efficiency for the pumps there is no change in that and it is a variable it is the flow control is a variable speed so over here I'm changing it I'm installing a vfd uh and it is at a high um flow range as well and I'm installing vfd drive and it is operating for the same operating hours so there is a 40.7% savings associated with installing of vfd but the client is looking for financial analysis so what I will do is I will client is looking for financial analysis specifically for vfd and not for all the measures right so what I will do is I will first select unselect everything and just select the pumps that is what the client is interested in right now I will be going into my finance tab okay so the information that the client uses for their financial analysis internally is they have a discounted rate of 5% okay uh depend sorry one thing that I wanted so again there are level one and level two in financial analysis as well depending upon how detailed the client is expecting in terms of the reporting so level one includes the inflation rate Project Life dep ratio interest rate what are the grants or incentives that are available and it will give you a quick analysis but if the client is like no give me like a detailed analysis on the finances aspect so that is a place where we use the level two analysis and it gives you graphical information the financial viability all the financial information that the client is looking for so in our case there's a discount rate of 5% so discount rate is five my reinvestment rate is 5% I won't be diving into what each and every term is um about here so inflation rate is 2% that is two and my inflation rate for energy is 4% right so my energy inflation rate fuel cost escalation rate is 4% I'm assuming my project life is 20 years and incentives so they mentioned ComEd one of the utility provider in the Chicago region they are currently giving you $200 per HP for upgrading to vfd we have a 50 HP motor so we are getting almost $10,000 from ComEd as an incentives right so we will do two types of analysis one without the incentives what is my payback and after getting the incentives what is my payback so that is a difference I can show to the client like the advantage of going with the incentives right so I will assume like the same other default values for the interest rate and this stuff and if you want to do a finance I mean income tax analysis you can do over here so sorry one thing one thing that we missed out was the cost the initial cost is $112,000 for implementing this measure right so now I go to the finance okay so now the client if the client makes an investment of $112,000 for upgrading the FD they are having a payback of 1.5 years without the ComEd incentives right that is associated with the Energy savings that they getting now let's see what is a change if they get incentives they're getting a $10,000 incentives their payback is 0.25 right so this is something that we can show to the client like why it is a good fit for them to upgrade to vfd though there is a capital Improvement measure but there are good incentives available in the market so better take an advantage of that and they are already getting U positive cash flow once they implement the measure right and this is also the place where you can see what is a reduction in their ghg emissions that is 572 uh USD per ton of CO2 save and if you are looking for a detailed GG emissions you go into the emissions tab specifically for doing a vfd upgrade this is a place where you can show to the client like what is a ghg savings associated with it and again as you asked like if it is sorry you had asked about the location so this is a place where specifically for the state of Illinois or depending upon where your project is you can select um the G emission Factor but if you have a specific metric that you use a different database you can certainly update that and um get get the actual GG emission for your project again in emissions that is level two level three depending upon how detailed you want to go uh it's a different level of analysis but to be uh to keep it simple we can do with level one any questions in this yes what is the difference between for which one for Mission yeah uh level one high level pretty straightforward right um level two is a place where depending upon for each fuel source what is my fuel mix what is my electricity generation effic efficiency like suppose if you have um like multiple sources like you have all the detailed information from the utility as well that is a place where you can enter the information for each fuel source and again in level three it is again one step ahead um where you get the GG emissions and everything associated with it I think it's in level two as well but it's uh you can yeah yeah yeah that is okay any questions for vfd upgrade uh there is one last thing that I will be teaching and then we will be taking a 10 minutes break and then hen will be teaching us I mean we will be doing a case study um based on the things that we have learned today okay so last thing that we will be learning from my end is now I have done everything for the HVAC lighting vfd upgrade but what about the building envelope right the building exterior like walls Windows Doors roof floor even that impacts the overall uh performance of your uh building energy right so now we will be modeling building envelope in this uh so we go into the Energy tab the building envelope right so now the first information that they have provided the building the North Face of the building is oriented 30° west of the actual North okay so now let's understand from red screen perspective how to enter that so if you select building North they will give you a definition um how to enter that value in red screen the user enters the angle measured in degrees between the North Face of the building and the true north that is the polar North is the building's North right buildings with North Face directed 10° East are entered as+ 10 and buildings with North Face um directed 10° West is minus 10 right so in our case the building is oriented 30° West so it will be minus 30 correct so as per red screen we need to enter this as minus 30 right next they have given the building floor area and roof area area is 100 by 100 square ft or 10,000 sorry 100 by 100 ft or 10,000 ft right so what I will do is I have the roof area that is of 10,000 squ ft and I have my floor area that is 100 by 100 so the parameter for a square is four times the side of the square right so that is 400 squ speed that is my parameter I will enter that information later I will explain why I am doing that next the Wall height is 20 ft for the building volume of 200,000 Square ft so cubic feet that is the volume for the building right so what I will do is I will go into the infiltration Tab and air change rate that is a place where I can enter the 200,000 that is my volume for the building so there are multiple ways there are multiple factors that impacts the building envelope so it includes so the things that we have is first is the orientation of the building right second walls if there is a window that is associated with that we have doors we have roof we have the floors if you have a basement that there is floor below grade the meaning of grade below grade and above grade anything that is below the ground level is considered as below grid okay anything above the ground level is considered as above grid okay so if you have a parking lot that is in the basement that is below grid if you have a outdoor parking lot that is above make sense the difference okay so we have the volume 200,000 Square cubic meter the east north all the all the walls East but north south is 2,000 square ft so my walls each is 2,000 squ ft um my walls and roof has an R value of 8 square fet degre Fahrenheit per BTU R I would highly recommend looking into the units because it always creates a confusion so in our case it is an R value of eight if you change the units it will give you U value so depending upon what information you have you can enter that information out here right and same for my roof as well my r value is8 okay now they have given floor is uninsulated on SLAP grid so my floor is below grid there I we mentioned about the parameter that is 400 square ft sorry feet and it is uninsulated on grade right so by default my r value is coming out to this one this is from red screen database does it make sense any question so far next they have mentioned my north wall is having a door and it is OCC occupying 10% of my wall area so my doors on the North side is having a 10% area and the windows sorry the South has a window area of 200 so the window is on my South Side 200 squ ft and the windows and doors has an R value of two oops sorry this is in percentage so r value of two for my windows and for my doors there is no solar shading so I will um uncheck that option and they haven't given anything about solar heat gain so I can either refer to the ashray standards for a particular window or I can refer to the uh red screen database so depending dep upon what type of window is it a fixed window or an operable window operable is something that you can open and close fixed is it doesn't move so I will assume it is uh operable window so my total window solar heat gain coefficient I'm assuming it is a double pan window it is 0.55 I'm just assuming that it is not provided I'm just assuming it is a 0.55 solar heat gain coefficient right and uh um and last they have given the air change rate of 04 right and it is impacting my heating cooling load so this is my Baseline Heating and Cooling energy consumption for my building based on the properties that I have defined for my wall Windows Doors uh roof um the air leakage and the floors makes sense and now I'm not doing any upgrade on this one right so one of the easiest way to transfer all the information from Baseline to proposed is the tab out here copy base to propos the one on the top if you select that you can in one go you can transfer all your information from Baseline to propose no need to enter manually everything or you could also do propose to base if you want to do the other way right so since my Baseline and proposed is same there won't be any Energy savings that is something I can confirm make sense okay any questions on this so we learned about benchmarking how to set up HC system we learned about the building envelope we learned about the lighting upgrades if there is a control measure that we are implementing how to do that uh if I'm installing a vfd how to do financial analysis so we learned about the multiple aspect on how red screen could be used um for all your projects and but yeah so now we will be taking a 10 minutes break but uh if you have any questions I'm available out here all right uh We Ready um attendees who are online I hope um you had a good break so did all of you got some time probably to stretch um use restroom have some coffee uh without wasting any time we can get right in um quick introductions my my name is hen shajid I am also an energy and decarbonization project manager at bomman Consulting uh been with the company for over three years now um also a certified red screen expert uh we I I work in the Washington DC office so most of my projects are in the DMV region working on energy audits commissioning commissioning similar to hardik's profile but in the DC area DC Maryland area um I'm going to share my screen and before I start talking about the case study want to make sure that everybody received those two case studies to red screen files uh from IG uh people on online did you guys receive those files because we may we will need you to pull those up while I walk through the case study okay we're going to walk through two case studies one is a multif family or residential property and another one is an office building these are actual projects that we hard and I have worked on in the past um and I will work through the red screen model there are a lot of pieces that uh I'll talk about um and I'll just walk through for the next 20 minutes or so and we'll give you about 40 minutes to work on the proposed case and calculate the energy savings typical Roi simple payback all of it um okay let's just dive right into it the first case study is for a multif family property the owner wants to Electrify the building um they have the the property owner has a decarbonization goal and they use it's it's an old building it's about it was constructed I think in' 70s um they use a lot of natural gas to to mostly heat the building they have a big huge steam boiler uh and they want to Electrify it they want to replace it with heat pumps uh more efficient systems using electricity get rid of any fossil fuels that that's burnt on site so that's the goal um they and in their efforts to Electrify they also want to replace their existing domestic hot water system so they have a central hot water boiler or heater that uses natural gas and supplies you know hot water to different units in the building there are about 50 units all one bedrooms um that's the basic background for the building um I have a few you know um information some information here there's a boiler we have the efficiency U there's no Central cooling system each unit has individual window AC's uh and it has particular efficiency value we have average average it out to a SE of 12 um proposed case what the owner is proposing is to re take out the boiler take out the window AC and install air source heat pumps in individual units um and get rid of the natural gas for heating we have the efficiencies for the heat pump Heating and Cooling we have the installed cost and there's some direction on what um costs to use and I'll get into it in a minute so before I go to the next part which is the domestic replacing the domestic hot water I want to open up the model actually while it's opening up let me talk about the domestic hot water replacement also so that I can work through the entire model together uh you can see the base case is a natural gas domestic hot water heater it has an efficiency of 70% um again they want to Electrify it meaning no natural gas so they want to replace it with a heat pump water heater it's also air sourced it runs on electricity there's no natural gas uh we have a cop we have an efficiency for the hot water system and the quoted price or the installed cost from a vendor is about $350,000 for that system and we want you to calculate the energy savings for both these scenarios uh you can see the kilowatt hour per year savings natural gas savings cost savings and what is the total percent of Energy savings um and of course the simple payback let's see if the model is yep all right uh I'll just quickly walk through you know the base case or the Baseline model it's a building in DC we have all the facility information um I've already created the the end users the system added everything I need to for the building so that you don't you don't have to add the base case all you need to do is calculate the energy savings under electricity and fuel you can see that there are two electricity and natural gas since it's a multif family building it's operating 24x7 we have the set points we have the change over temperatures um under heating you can see that there's a boiler with the efficiency that was also in the case study PDF water heater with an efficiency of 70% uh for now you can ignore the process heat uh because we want to only focus on the boiler and the cooling Heating and the cooling of the building um under cooling the compressor essentially means the window AC units that they have and you can switch the efficiency rating you can switch it from cop to se these are just two different units uh that you know you use to calculate what the efficiency of the system is so for the base is for vend AC units it's a SE of 12 and then we have the building envelope again we've walked through it in our previous or you know before the break uh we have the wall areas we have the window areas we have every all the information entered uh and this information is directly coming from the drawings of the property um the heat the building is heated and cooled it's assigned a boiler it's assigned the window AC units and it calculates the total Heating and Cooling energy for the building we've entered all the lights hallway stairwell basement lights unit lights exterior lights but for this case study you're only going to focus on the heating and cool in uh for the hot water we have entered as an end use how much hot water the building uses we know uh We've calculated we've used the red screen recommended values um for for the apartment um it's about 1325 gallons per day we have entered all the information in here and again we don't need to walk through every detail um we've assigned it a water heater and calculated how much energy is used in heating or in domestic hot water so just as a as a tip all you will you would need to do is change the system and the efficiencies in the proposed case for boiler water heater and the cooling compressor this is all you need to do and calculate the energy savings and of course also calculate the cost uh once you've done that you would go on the include measure Tab and you will see the costs the fuel cost savings the simple payback and you can select each measure individually so if you're calculating only the um electrification of Central Boiler you're replacing the boiler and Window AC you just check the boiler and compressor and right now it's zero because we've not entered anything in the proposed case we've not replace the system yet so it's all zero but once you enter you'll have different values for cost fuel cost saving simple payback um and when you you can check uncheck these two when you're working on the water heater you just check the water heater update the proposed case values and you'll get the the new or the savings number and at the end there's a question for final results which is the project savings so both of these measures combined what is the energy savings and the cost savings for the project for which you will have to check all the equipment so boiler water heater and compressor and it will the red screen software will combine the savings and at the bottom you can get the total cost savings Energy savings and payback any questions for the multif family case study okay uh me open the office and while it opening I'll talk about I'll just give you a quick background about the second case study this one is a commercial building it's a 12 story building um office building and the owner has certain ESG targets and to meet those targets he has planned a renovation an entire office renovation uh the first part of the renovation is going to upgrade upgrade all the lighting in the building currently it they have all fluoresent e8s actually very similar to what you see right here but I think these could be LEDs um uh but the owner wants to replace the fluorescent lights with LEDs um and lighting is a major contributor in that building because it's well very old and these are all floresent t8s um the building is already running all electric there's no natural gas uh and the next thing the owner wants to implement is replacing the existing Windows they have double pane windows and uh the owner wants to replace it with triple pane windows because it's it's essentially an entirely a glass building so there's a lot of solar heat gain um and there's been some thermal Comfort issues and the owner wants to replace the double pain with triple pain so that there's this you know the thermal Comfort increases there will be also Energy savings but the intent or the intention is mostly to increase thermal Comfort um we have some base case numbers here uh and let me just pull up the office building there you go for this uh we not worried about the central system as much as we are for as we want to look at the lighting and the building envelope so in lighting we have three different end uses we have all the floors so these are all the office lighting you can see there are flors and t8s with 32 watts and three lamps per fixture so similar to what we have in this room I can see that there are two lamps we have three lamps for each uh fixture um these Flor ands because they are so old they also have some miscellaneous losses uh losses are assumed to be 10 wats there are 70 fixtures on a single floor and there are total of 12 floors in the building and that gives you around 324,000 kilow hour for just the floor lighting then you also have the exterior lighting these are metal halides 175 wats and it's all in uh the worksheet also exterior lighting 175 wats Mercury hiide with uh 10 wats of losses total of 24 fixtures so 175 Watts 10 watt losses and total of 24 fixtures next is the stairwell lighting we have two lamp 32 wat uh T8 similar to what you have in the office space but there's one floor per fixture so you have 32 wats two lamps per fixture um and 12 floor so 12 uh units any question so far about the lighting part for the proposed case now all you have to do is replace the flors and lighting with LED you have office you're replacing the office lights those are the florescent lamps with 12 wat LED lamps we have the installed cost for each fixture for the exterior lights we are replacing the 175 wat Mercury hiide with 54 wats LED with daylight sensors right so right now these EXT lights are on 24/7 and I can show you that right here so operating hours are 24 hours and in a typical building you don't need the exterior lights to be on 24/7 you can install daylight sensors or photo cells you know so that they go off or at least dim down when it's it's daylight outside um for now I we want you to assume that upon installation of daylight sensors the runtime reduces by 50% so it's not running during the day it's only running during the night and assumption is it's running only 50% of the time so 24 hours becomes 12 hours um and then the third is to replace the stairwell lighting with 8 wat LED lamps and we have the fixture cost also for that so that would be the first um measure to implement in the office renovation case study uh and the next scenario the next measure is window replacement once you've entered or once you've replaced all the lights we want you to go to the building envelope we have all the oh sorry thank you um where was I building envelope we have all the numbers entered already uh this is the base case we have the u values of the window which essentially gives you tells you how um efficient the window is we have the solar heat gain coefficient and again as hardic pointed out in the session previously you can click on the the text itself and there'll be some blue text so these are fixed Windows Office Buildings are generally fixed windows you want to click on typical values for fixed windows and then you have the table right now now they are double pain and what they're installing is the last row in this table which is triple pain low E Arin plus two pyrotic uh Windows um and I want you to use the total window value not the center of glazing uh the last colum and these values essentially so that's the first row is your base case or what's currently uh in the building and the last row is what the owner plans to replace it with so so you can use those values enter it in the proposed case so what you will change is the U value which is which are these numbers uh assuming they same on each face of the building and solar heat gain coefficient which should also be in this table right here SGC for triple pain low E argon which is 0.41 I know I've thrown a lot of information at you uh and again you have about 40 45 minutes to complete the assignment so any questions let me know um before I let you start working on the assignment just one quick let me go back to the assignment okay similar to um the previous case study just enter your savings dollar perer total percent of total Energy savings simple payback um for both measures and have the final result checking of both the measures together uh the reason we want to First do it separately and then do it together do you do you know why we want to calculate both of them together and enter it in total project savings that goes back to the previous conversation we were having about interactive effects so both these case studies if you notice there's a question called are there any interactive effects yes or or no at the end even in the first case study we have uh similar question are there any interactive effects when you're um just give you an a simpler example if I were to insulate this particular room and make it more um tighter or there's more insulation in the walls there's less leakage so the amount of heating and cooling you need is going to be lower um now when I'm replacing those lights along with insulating the walls um LED typically would give out less heat than a fluorescent T8 would so when you replace your florescent with LEDs you save up on your electricity but you do increase your heating demand in the in the room because there's less heat emitted from the light itself so there's there it it still makes sense to replace it because the energy say electricity SA is high enough uh but these both measures both of these measures interact with each other and the savings might not let's say the savings from replacing or insulating the wall was was 100 units but if you replace the lights it would drop from 100 to let's say 80 or 85 I'm just throwing numbers but the these both measures have interactive effects and red screen calculates that so when you check off under include measure if two measures have interactive effect effect and you check both of those measures simultaneously it will take that into consideration and your final savings number would not be X Plus y it'll be lower than that yes but since like this analysis it's focusing on Replacements of like existing like appliances or like insulation is it body Cardon accounted for any analysis or is it just an operating cost it's just the operating uh efficiencies embodied C I'm not sure is does red screen take care no there's no embodied carbon calculation in red screen at least um with that I think I will we have about 45 50 minutes you can start the case study you have those you can use the same models that we've sent you you can use the work sheet we have all the proposed case we have um all the cost values the efficiency values you just need to rep Place into the model and fill the the worksheet all right we will probably get back in about 30 minutes and I'll open up the solutions and we'll walk through the solutions together okay let's go through the multif family um case study which is the first one let me pull up all right so what do we have we had um a boiler system just to recap with a 65% efficiency window AC units with a SE of 12 we are replacing with air source heat pumps um total of 50 heat pumps with a heating cop of 3.2 cooling cop of six so let's go back uh did you guys enter the cop or did you try to use the product database from screen okay uh and that's okay we did not discuss that but let me show you what what what it is let me first copy base to propose so this is your um this is how it was this is your base case you if you check your heating equipment you can just simply change the efficiency to 320% or cop of 3.2 but if you want to use red screen database it also has a list of heat pumps from different manufacturers with different uh efficiency numbers you just check the heating equipment uh box and you see there's a small button which says product data base click on that now if you go back to the case study we've mentioned it's a train tww uh unit let's see if we can find that one in red screen so first you change the technology which is from boiler to a heat pump under type this is an air source heat pump sorry it's an air source heat pump under manufacturer you scroll down to train and let's see what was the model number it's tww 120 A3 TW wa 120 A3 and and you have 50 units so you can change the number of units paste it gives you all the data and now you can just simply change the efficiency to 320% again you don't you don't need to do this but if your client is requesting for particular manufacturer information you you can also uh use thread screen database to input that um what's next we have a cooling cop of six so let's go back to red screen now we go to the oh sorry I did forgot forget to forgot to mention that you have to change your fuel or technology and fuel type from boiler to heat pump and heat pump is not going to use natural gas it's going to use electricity so you change the fuel source electricity and that's what your proposed cases for the boil for the heating system now for the cooling system you go to the compressor uh the technology and fuel technology can change to heat pump but the fuel source or fuel type is going to stay to electricity um I'm going to uncheck this cooling equipment the cop of performance uh is being given as six so I've entered that as six and that finishes off the proposed case for heating and cooling now um for the cost it's recommended that we use red screen values or values from red screen database and I'll show you how to do that for average air cooled systems and I'll show what that means so we go back to the boiler you see this little doll dollar sign uh under the equipment you click on the cost database and it pulls up this database of costs you have biomass systems boiler furnace heater heat pumps uh ground source and air source for for the case study we are using the uh air source heat pumps we are installing air source heat pumps and we want to use the average cost so you have three ranges minimum average and maximum uh for this case study we are going to use 1520 which is the average cost for a air soat pump um and you just hit paste data and that's 1520 and comes up to about 2.7 million us one thing I do want to mention that in the model I've already have an exchange rate because this is in Canadian dollars so I've added a although it's much higher now but the exchange rate is entered as 1.25 and it's US in US Dollars it's about 2.7 million but this is only for the heating part you have to do the same for the cooling part click on the dollar value there's heat pump again average uh cost which is $680 and I paste the data and there you go so we have the cost but we also need to do that for a water heater what's the water heater cost have you mentioned the water heater cost let's scroll down actually we'll get to it in a minute uh were you able to fill out those numbers for the savings for heating and cooling if not this is how this is what the numbers are and let me pull up that again I go to include measure I check only the boiler and the compressor because I want to see the savings from replacing the central system and my cost is about 39 million to replace the entire Central system and Window AC units with heat pumps airs so heat pumps my fuel cost savings is $15,000 annually and the payback you can see is it's negligible it's there is no payback back um but generally there are there are goals uh for different building owners and they want to Electrify because uh to just give an example Washington DC has a building performance standard which requires or sooner than later it will require buildings to get rid of all fossil fuels burnt on site so it people could do that building owners could do that for different reasons although there is sometimes no payback but the savings number if you see um how can you see the % of total savings you click on comparison on the top and it brings you to this page that summarizes your um savings for you so your on the top right you can see the fuel saved so natural gas you've saved about 26,000 thms electricity you've saved or you've not saved because now you've electrified the system so you're using more electricity than you were but you're saving up on natural gas you're using 113,000 kilow hours more than you were initially but your total savings is 60.4% meaning the building uh if the building chooses to replace its Central system with heat pumps it will save 60% of its energy that it's using annually although there is no real payback in terms of dollar value but it ends up saving 60 60 to 61% so if there are corporate targets that a building has to meet or if there are performance standards that the the building has to meet 20% reduction 30% reduction just you know replacing the central system in this case can meet those targets any questions for the boiler replacement okay let's go to the heat pump water heater um to replace the heat pump water heater we have initially we have an efficiency of 70% so let's go back we go to water heater this is let me first copy based to propose so we have an efficiency of 70% but we are replacing the water heater with a heat pump water heater so now it's not going to use natural gas instead it's going to use electricity to provide uh domestic hot water to all units in the building so I change that to a heat pump system I change the source of fuel from elect natural gas to electricity and the effic icy or the cop is 3.5 which is in red screen numbers it's 350% we have also been given the cost of the project it's about $350,000 I can just add that number without using red screen database I can just add $350,000 here um now if I go to include measure I see that the numbers have not changed and this is because I've not checked the water heater so I uncheck my first measure and I check only the water heater you can see the incremental costs the initial cost is $350,000 um the project is saving $1,500 annually again virtual there's no payback at all um but how much do you end up saving in percentage it's about 88.8% so you lose electricity you're using more electricity you save about 4,156 thms you're using about 25,000 Kow hours more than you were but you're saving almost 9% of total energy as seen in this table here now for the final results all I need to do is just check both of these measures together so I checked the boiler I've already checked water heater I checked the compressor which is the cooling uh part of the project and now it gives me the total cost which is about 4.2 million kilow uh for $4.2 million these are my dollar savings again even combined there is no um real payback but the total percent savings is almost 70% so just by replacing or getting rid of fossil fuel like burning equipment the building can end up saving about 70% of its energy but because electricity is generally um a much more expensive fuel there is no real payback on these projects but these two measures don't have any interactive effects between them meaning if I were to uh when I when I replace my boiler with heat pumps let's say I end up saving 100 units of energy and if I replace the domestic hot water with heat pump water heater I end up saving 50 units of energy I can simply add those two and confidently say that the total savings would be 100+ 150 because there there are no interactive effects between them so that would answer your final question are there any interactive effects no these two measures do not interact with each other any questions for case the first case study all right let's go to the second one um okay this is an office renovation the base case is we've already established the base case they have florescent lights Mercury alids for exterior and also florescent lights for stairwell what are they replacing it with so they're replacing office lights with 12 watt LEDs let's go to the let's go to the lighting section so this is for the office light I'm replacing the floresent t8s with LED my electricity load per lamp or Watts goes down to 12 watt the number of fixtures stay the same so I'm still I still have three lamps per fixture but there are no miscellanous losses so I get rid of this so just by replacing the office lights I'm saving 66% of the electricity uh the next is replacing exterior lights with 44 54 wat LED lamps with daylight sensor so I go to the exterior lights I changed the metal Hy to LED initially the they had metal halides at 175 wats I'm now replacing it with a 54 W LED assuming there are no miscellaneous losses but now they also have these are equipped with daylight sensors so the 24r change goes down to 12 hours assuming there there's a 50% reduction in run hours and that gives just within the exterior lights it's a saving of about 85% electricity similarly let's do the stairwell lights it's 8 watt LED I have already made those changes so LED 8 watts two lamps again nothing else changes just the wattage and the type of fixture and that's about 78.4% savings I've already added the costs um actually let's let's add the cost installed cost for each fixture is $100 so per fixture that they replace it's about $100 and there are about uh 70 fixtur so I'm going to multiply that 70 into 100 which is about $7,000 oh sorry I'm entering into the wrong column it's the initial cost $7,000 for exterior lights it's $250 per fixture so $250 per fixture and for stairwell lights it's $80 per fixture so I can just enter that in the blue columns and let's go to include measure let's just check the lighting bit so these three measures I can see on an individual level or on on each row what's the payback what the savings is but if I want to calculate the total savings out of this lighting retrofit my initial costs are about $90,000 my savings is about $20,000 and my simple payback is about 4.4 years which is not bad any questions for the lighting retrofit okay the last one is the window replacement um the owner wants to replace its windows with double pin to Triple pin and we have the initial or base case u values and the solar heat gain coefficient in the case study it's recommended that we use the red screen database for U value and solar heat gain coefficient for the proposed case for triple pin and that's what we are going to do so let's go back I would click on U value and typical values for fixed windows because this is an office building and generally assuming that these are fixed windows and not operable and for triple pain plus two ptic uh low E Argan Windows the U value is 1.18 and S GC or solar heat gain coefficient is 0.41 so I'm just going to enter that in my proposed case but what I have to be very careful about is that the units are in imperial system right now so I need to change that to metric because the recommended numbers were in the metric system um so now I changed that to I forgot 1.18 I changed that for all faces so north east west and south 1.18 and my solar heat gain coefficient was 0.41 0.41 and if I scroll down I would see the Savings in Heating and Cooling energy by replacing the windows from double pain to Triple pan now for the cost it's also recommended to use uh red screen database with average uh value of average installation without in insulating Edge so let's go back and again hit on the hit click on the dollar icon and it'll give you all the databases or the red screen database so I'm using this is not an operable type this is a fixed type uh window I'm going to select the window itself because and you can select and unselect whatever you want so when you pull up this is how it's going to be I'm replacing the window I'm adding l e because it's triple pain and Aran but I'm not insulating The Edge so I'm not going to select this but this is only the window cost okay we were talking about the and I hope you can see the screen now we're talking about pulling the costs from red screen database for Windows so I click on the database um when you open the windows this is how it's going to look like um first I need to select the type of window that I want to replace it with so I'm replacing with a triple pane window I'm using the average cost for the windows um average cost for adding Argan it's low E but I'm not insulating The Edge space so I'm not going to select the Plus 23 uh I also need to add the cost for installation which includes labors and other costs so I select that but there's nothing on these rows and I just hit apply and it gives me uh dollar value per square feet and the total cost for replacing the windows now if I go to include measure I want to see the savings from the window replacement so I uncheck the lights I go to building envelope I check the building envelope and these are my numbers so my initial costs are $640,000 my savings is about $8,000 the payback is about 77.4 which is again virtually there's no payback and usually with building enclosure measures there are there is no payback it's it doesn't save as much as it costs but if I I want to see the percent of Energy savings I click on comparison again I see that I've saved 76,000 kilowatt hours I've saved $8,000 and I've saved about 4% of the total energy or total site energy any questions so far no okay and the last question was what what the final results are and now there are interactive effects between these two measures because when you're um replacing your windows your your load reduces which means your savings from the lightings is going to interact with the windows savings and it's not going to be 1+ 1 equal to two it's going to be lower than that for that to know what the final savings number are we need to check all the measures that we've implemented and at the bottom these are your numbers so your payback now is 25.1 years with a savings of about $30,000 and investment of $730,000 and if you want to see how much you've saved uh on a site energy basis I click on comparison again I've saved about 14% energy by implement or by replacing the lights and replacing the windows any questions um all right I think if that's all we're going to share the final case study Solutions and the worksheet with you after this presentation um feel free to reach out to hardik or myself or to um IG if you have any questions happy to answer any questions I think you have a 30-day 30-day trial with red screen so you know go ahead and play with it um you can there are virtual energy analyzers and let me quickly show you how that works I'm going to share the screen for people who are online since we are on the call so if you go to file you see virtual energy analyzer you click on the virtual energy analyzer and you can pick an address you can pick the type of building let's say I want to try and I want to see a residential building um I want to see a single family home I want to see it in Houston Texas you can enter the entire address if you have it and I just run that it will give you uh an archetype so it's it's there are hundreds and thousands of archetypes in red screen you can just you know pick whatever you want to see so it's it's it's a predefined model with different measures implemented and the savings calculated and they also have notes so if you scroll down you would maybe not this one was maybe this was not a great example for notes but generally in archetypes they also have notes written down or measures how they've how they've measured it uh solar water heater solar PV you can calculate the savings or generation out of Renewables also so you can pick any any facility globally uh different types different measures implemented and you know that would be a good starting point if you want to see how red screen is calculating these numbers or how to go about it all right if that's all thank you so much guys for being patient with us uh it was a long training but thank you so much appreciate uh you all attending and I hope you get home safely there's a wi of storm out there uh for those of you online thank you so much for attending if you have any questions just reach out to again hardik myself uh or IG happy to answer any questions that you may have