Slide 1

Low Energy Building DesignScott MorrisonSamantha Dowling Nicolas Levaudel Nicolas SoroScott1Sample Wall Construction

Nico L2Prefabrication

Curtain Walling SystemCladding SystemInsulation Panels

Glazing

Triple GlazingLow E Coating Argon FillInsulated FrameU-Value = 0.57w/m2kSolar Transmittance = 0.57

Nico S4Solar GainArea of Glazing = 660m2Transmittance = 0.57South facing verticalTotal Solar Heat Gain = 216110kWhJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember

5

Solar ControlGreen Building Store http://www.greenbuildingstore.co.uk/page--ecoplus-energy-efficient-glazing.htmlExternal shading overhangs/louvres

Light shelf

6Lighting

Samantha

7Lighting

21st March 9.00AM

70% of lighting required at 67% intensityScott

8Lighting

50% of lighting required at 50% intensity

21st March 12.00PMScott9Lighting

100% of lighting required at 83% intensity

21st March 6.00PM

Scott10LightingOpen Plan office space average % lighting required = 50%36 fittings per floor operational 13 hours a day

Cellular offices with occupancy sensors 12 fittings per floor operational 8 hours a day

Toilets with occupancy sensors 4 fittings per floor operational 3 hours a day43W fittings throughout

Energy consumption for March (average for the year) = 1502.6kWh

Heat gain from lighting 100% = 1502.6Samantha

11Materials

Ground Floor ConstructionGGBS Insitu Concrete SlabKingspan Thermafloor TF70 InsulationDamp Proof Membrane/Waterproofing

U-Value Achieved = 0.14 W/m2K

Samantha

12MaterialsRoof ConstructionGGBS Insitu Concrete SlabKingspan Thermaroof TR26 LPC/FM InsulationDamp Proof Membrane/WaterproofingGypsum PlasterU-Value Achieved = 0.112 W/m2K

Atrium Glazing (Full System Frame + Glass)A98 Atrium Glazing UnitsU-Value Achieved = 0.79 W/m2K

Samantha

13Demand ReductionGrey Water Harvesting Permeable Paving

Samantha

14Demand ReductionWater Reduction Appliances

TapsToiletsUrinalsShowerApplianceTM-95065 Monoblock Tap

If Sign Universal WC

AIRFLUSH urinal system

Aerated Ecosmart shower headTypical Flowrate of non-water saving20L/Minute (Cold)12L/Minute (Hot)11L/Flush10L/Hour/Urinal20L/MinuteWater-Saving Appliance Flow Rate 1.7L/Minute4L/Flush-6L/MinutePercentage of water saving91.5% (Cold)85.83% (Hot)63.64%100%*70%

Samantha

15Demand ReductionSamantha

16Fabric Heat Loss

Q= U*A*T

Samantha

17Ventilation lossPv = (Cv*N*V*T)/3600

Samantha

18Solar gains

Samantha

19Casual heat gains

Samantha

20Heating/Cooling demand

Energy Balance :

Fabric Heat Losses + Ventilation Heat Losses =Solar Heat Gains + Casual Heat Gains + Energy for Heating or CoolingSamantha

21Heating/Cooling demandSamantha

22Heating/Cooling demand

With shading overhang: % of solar transmited = 0,84 in winter % of solar transmited = 0,55 in summerSamantha

23Heating/Cooling demandUnderfloor heating and cooling system

Samantha

24Cooling demandUnderfloor cooling system is not good enoughIncrease airflow through ventilationInstall air conditioning system

Air Supplied Air extracted Ground Heat ExchangerVentilation Design

Website

WebsiteThanks for Listening Any Questions? Nico L29Feuil1Hours of the day77.3088.3099.301010.301111.301212.301313.301414.301515.301616.301717.301818.301919.3020Number of people03280152200248288296296296290260240244272280276260240200152764020840Heat gain from people (W)0352088001672022000272803168032560325603256031900286002640026840299203080030360286002640022000167208360440022008804400Heat gain from laptops (W)064016003040400049605760592059205920580052004800488054405600552052004800400030401520800400160800Air change (l/s)025664012161600198423042368236823682320208019201952217622402208208019201600121660832016064320Air change (m3/hour)0921.623044377.657607142.48294.48524.88524.88524.88352748869127027.27833.680647948.87488691257604377.62188.81152576230.4115.20Consumption for ventilation (W)051212802432320039684608473647364736464041603840390443524480441641603840320024321216640320128640Air change per hour00.0997834560.24945864010.47397141620.62364660030.77332178430.89805110440.92299696840.92299696840.92299696840.90428757040.81074058030.74837592030.76084885230.84815937640.87310524040.86063230840.81074058030.74837592030.62364660030.47397141620.23698570810.12472932010.062364660.0249458640.0124729320Heat gain per sitting person (W)110Heat gain from laptop (W)20Air change per hour per person8Overall electrical demand from applicances (W)33800Buidling volume (m3)9236Interior temperature (C)20Average air change per hour0.548578028

JanuaryfebruarymarchaprilmayjunejulyaugustseptemberoctobernovemberdecemberAverage outside temperature (C)33.557101314.5141294.53.5Ventilation loss (W)28424275882508021736167201170491961003213376183922591627588Ventilation loss (kWh)7759.7527531.5246846.845933.9284564.563195.1922510.5082738.7363651.6485021.0167075.0687531.524Natural ventilation loss (kWh)3103.90083012.60962738.7362373.57121825.8241278.07681004.20321095.49441460.65922008.40642830.02723012.6096

Solar gain (Watt)6657119.81395642019826892280269702844901924866354268547522256932118741614162122267541226.55636161Solar gain (kWh)6657.119813956.4219826.89228026.9728449.01924866.35426854.75222569.32118741.61416212.2267541.22655636.161WallsGlazingRoofFloorAtriumU-Value0.130.570.1120.140.71Surface1008660615615172JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberOutside temperature (C)33.557101314.5141294.53.5Ground temperature (C)8656810.512.51414.513.5129Fabric loss though walls (W)222821621966170413109177217861048144120312162Fabric loss though glazing (W)639562075643489137622633206922573010413858316207Fabric loss though roof (W)11711137103389568948237941355175810681137Fabric loss though floor (W)10331205129212051033818646517474560689947Fabric loss though atrium (W)20762015183215881221855672733977134318932015TOTAL Fabric loss (W)129031272611765102838016570644864706605982401151212468TOTAL Fabric loss (kWh)960094688753765059644245333835014508613185659276

Average heat gains from people5283Average heat gains from appliances1423Average heat gains from lighting1503JanuaryfebruarymarchaprilmayjunejulyaugustseptemberoctobernovemberdecemberTOTAL GAIN 148652216528035362353665733075350633077826950244201574913844TOTAL LOSS17360170001560013584105287440584862408160111521564016808Difference-249451651243522651261292563429215245371879013269110-2963Solar gain with shading5591.98063211723.392816654.5892815414.833515646.9604513676.494714770.113612413.1265510307.887713618.269846334.630264734.37524total gain138001993224863236232385521885229782062118516218261454312943total loss17360170001560013584105287440584862408160111521564016808diff-35602932926310039133271444517130143811035610675-1097-3865

Feuil1Hours of the day77.3088.3099.301010.301111.301212.301313.301414.301515.301616.301717.301818.301919.3020Number of people03280152200248288296296296290260240244272280276260240200152764020840Heat gain from people (W)0352088001672022000272803168032560325603256031900286002640026840299203080030360286002640022000167208360440022008804400Heat gain from laptops (W)064016003040400049605760592059205920580052004800488054405600552052004800400030401520800400160800Air change (l/s)025664012161600198423042368236823682320208019201952217622402208208019201600121660832016064320Air change (m3/hour)0921.623044377.657607142.48294.48524.88524.88524.88352748869127027.27833.680647948.87488691257604377.62188.81152576230.4115.20Consumption for ventilation (W)051212802432320039684608473647364736464041603840390443524480441641603840320024321216640320128640Air change per hour00.0997834560.24945864010.47397141620.62364660030.77332178430.89805110440.92299696840.92299696840.92299696840.90428757040.81074058030.74837592030.76084885230.84815937640.87310524040.86063230840.81074058030.74837592030.62364660030.47397141620.23698570810.12472932010.062364660.0249458640.0124729320Heat gain per sitting person (W)110Heat gain from laptop (W)20Air change per hour per person8Overall electrical demand from applicances (W)33800Interior temperature (C)20Average air change per hour0.55Buidling volume (m3)9236Volumetric specific heat capacity of air (J/m3K)1200

JanuaryfebruarymarchaprilmayjunejulyaugustseptemberoctobernovemberdecemberAverage outside temperature (C)33.557101314.5141294.53.5Ventilation loss (W)28424275882508021736167201170491961003213376183922591627588Ventilation loss (kWh)776075326847593445653195251127393652502170757532Natural ventilation loss (kWh)310430132739237418261278100410951461200828303013

Solar gain (Watt)6657119.81395642019826892280269702844901924866354268547522256932118741614162122267541226.55636161Solar gain (kWh)6657.119813956.4219826.89228026.9728449.01924866.35426854.75222569.32118741.61416212.2267541.22655636.161WallsGlazingRoofFloorAtriumU-Value0.130.570.1120.140.71Surface1008660615615172JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberOutside temperature (C)33.557101314.5141294.53.5Ground temperature (C)8656810.512.51414.513.5129Fabric loss though walls (W)222821621966170413109177217861048144120312162Fabric loss though glazing (W)639562075643489137622633206922573010413858316207Fabric loss though roof (W)11711137103389568948237941355175810681137Fabric loss though floor (W)10331205129212051033818646517474560689947Fabric loss though atrium (W)20762015183215881221855672733977134318932015TOTAL Fabric loss (W)129031272611765102838016570644864706605982401151212468TOTAL Fabric loss (kWh)960094688753765059644245333835014508613185659276

Average heat gains from people5283Average heat gains from appliances1423Average heat gains from lighting1503JanuaryfebruarymarchaprilmayjunejulyaugustseptemberoctobernovemberdecemberTOTAL GAIN 148652216528035362353665733075350633077826950244201574913844TOTAL LOSS17360170001560013584105287440584862408160111521564016808Difference-249451651243522651261292563429215245371879013269110-2963Solar gain with shading5591.98063211723.392816654.5892815414.833515646.9604513676.494714770.113612413.1265510307.887713618.269846334.630264734.37524total gain138001993224863236232385521885229782062118516218261454312943total loss17360170001560013584105287440584862408160111521564016808diff-35602932926310039133271444517130143811035610675-1097-3865

Feuil1Hours of the day77.3088.3099.301010.301111.301212.301313.301414.301515.301616.301717.301818.301919.3020Number of people03280152200248288296296296290260240244272280276260240200152764020840Heat gain from people (W)0352088001672022000272803168032560325603256031900286002640026840299203080030360286002640022000167208360440022008804400Heat gain from laptops (W)064016003040400049605760592059205920580052004800488054405600552052004800400030401520800400160800Air change (l/s)025664012161600198423042368236823682320208019201952217622402208208019201600121660832016064320Air change (m3/hour)0921.623044377.657607142.48294.48524.88524.88524.88352748869127027.27833.680647948.87488691257604377.62188.81152576230.4115.20Consumption for ventilation (W)051212802432320039684608473647364736464041603840390443524480441641603840320024321216640320128640Air change per hour00.0997834560.24945864010.47397141620.62364660030.77332178430.89805110440.92299696840.92299696840.92299696840.90428757040.81074058030.74837592030.76084885230.84815937640.87310524040.86063230840.81074058030.74837592030.62364660030.47397141620.23698570810.12472932010.062364660.0249458640.0124729320Heat gain per sitting person (W)110Heat gain from laptop (W)20Heat gain from printers (W)1100Heat gain from laptop (W)20Air change per hour per person8Overall electrical demand from applicances (W)33800Interior temperature (C)20Average air change per hour0.55Buidling volume (m3)9236Volumetric specific heat capacity of air (J/m3K)1200

JanuaryfebruarymarchaprilmayjunejulyaugustseptemberoctobernovemberdecemberAverage outside temperature (C)33.557101314.5141294.53.5Ventilation loss (W)28424275882508021736167201170491961003213376183922591627588Ventilation loss (kWh)776075326847593445653195251127393652502170757532Natural ventilation loss (kWh)310430132739237418261278100410951461200828303013

JanuaryfebruarymarchaprilmayjunejulyaugustseptemberoctobernovemberdecemberSolar gain (W)665712013956420198268922802697028449019248663542685475222569321187416141621222675412275636161Solar gain (kWh)665713956198272802728449248662685522569187421621275415636WallsGlazingRoofFloorAtriumU-Value0.130.570.1120.140.71Surface1008660615615172JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberOutside temperature (C)33.557101314.5141294.53.5Ground temperature (C)8656810.512.51414.513.5129Fabric loss though walls (W)222821621966170413109177217861048144120312162Fabric loss though glazing (W)639562075643489137622633206922573010413858316207Fabric loss though roof (W)11711137103389568948237941355175810681137Fabric loss though floor (W)10331205129212051033818646517474560689947Fabric loss though atrium (W)20762015183215881221855672733977134318932015TOTAL Fabric loss (W)129031272611765102838016570644864706605982401151212468TOTAL Fabric loss (kWh)960094688753765059644245333835014508613185659276

Average heat gains from people5283Average heat gains from appliances1423Average heat gains from lighting1503JanuaryfebruarymarchaprilmayjunejulyaugustseptemberoctobernovemberdecemberTOTAL GAIN 148652216528035362353665733075350633077826950244201574913844TOTAL LOSS17360170001560013584105287440584862408160111521564016808Difference-249451651243522651261292563429215245371879013269110-2963Solar gain with shading5591.98063211723.392816654.5892815414.833515646.9604513676.494714770.113612413.1265510307.887713618.269846334.630264734.37524total gain138001993224863236232385521885229782062118516218261454312943total loss17360170001560013584105287440584862408160111521564016808diff-35602932926310039133271444517130143811035610675-1097-3865

Feuil1Hours of the day77.3088.3099.301010.301111.301212.301313.301414.301515.301616.301717.301818.301919.3020Number of people03280152200248288296296296290260240244272280276260240200152764020840Heat gain from people (W)0352088001672022000272803168032560325603256031900286002640026840299203080030360286002640022000167208360440022008804400Heat gain from laptops (W)064016003040400049605760592059205920580052004800488054405600552052004800400030401520800400160800Air change (l/s)025664012161600198423042368236823682320208019201952217622402208208019201600121660832016064320Air change (m3/hour)0921.623044377.657607142.48294.48524.88524.88524.88352748869127027.27833.680647948.87488691257604377.62188.81152576230.4115.20Consumption for ventilation (W)051212802432320039684608473647364736464041603840390443524480441641603840320024321216640320128640Air change per hour00.0997834560.24945864010.47397141620.62364660030.77332178430.89805110440.92299696840.92299696840.92299696840.90428757040.81074058030.74837592030.76084885230.84815937640.87310524040.86063230840.81074058030.74837592030.62364660030.47397141620.23698570810.12472932010.062364660.0249458640.0124729320Heat gain per sitting person (W)110Heat gain from laptop (W)20Heat gain from printers (W)1100Heat gain from laptop (W)20Air change per hour per person8Overall electrical demand from applicances (W)33800Interior temperature (C)20Average air change per hour0.55Buidling volume (m3)9236Volumetric specific heat capacity of air (J/m3K)1200

JanuaryfebruarymarchaprilmayjunejulyaugustseptemberoctobernovemberdecemberAverage outside temperature (C)33.557101314.5141294.53.5Ventilation loss (W)28424275882508021736167201170491961003213376183922591627588Ventilation loss (kWh)776075326847593445653195251127393652502170757532Natural ventilation loss (kWh)310430132739237418261278100410951461200828303013

JanuaryfebruarymarchaprilmayjunejulyaugustseptemberoctobernovemberdecemberSolar gain (W)665712013956420198268922802697028449019248663542685475222569321187416141621222675412275636161Solar gain (kWh)665713956198272802728449248662685522569187421621275415636WallsGlazingRoofFloorAtriumU-Value0.130.570.1120.140.71Surface1008660615615172JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberOutside temperature (C)33.557101314.5141294.53.5Ground temperature (C)8656810.512.51414.513.5129Fabric loss though walls (W)222821621966170413109177217861048144120312162Fabric loss though glazing (W)639562075643489137622633206922573010413858316207Fabric loss though roof (W)11711137103389568948237941355175810681137Fabric loss though floor (W)10331205129212051033818646517474560689947Fabric loss though atrium (W)20762015183215881221855672733977134318932015TOTAL Fabric loss (W)129031272611765102838016570644864706605982401151212468TOTAL Fabric loss (kWh)960094688753765059644245333835014508613185659276

Average heat gains from people (kWh)5283Average heat gains from appliances (kWh)1423Average heat gains from lighting (kWh)1503JanuaryfebruarymarchaprilmayjunejulyaugustseptemberoctobernovemberdecemberTOTAL GAIN 148652216528035362353665733075350633077826950244201574913844TOTAL LOSS17360170001560013584105287440584862408160111521564016808Difference-249451651243522651261292563429215245371879013269110-2963Solar gain with shading5591.98063211723.392816654.5892815414.833515646.9604513676.494714770.113612413.1265510307.887713618.269846334.630264734.37524total gain138001993224863236232385521885229782062118516218261454312943total loss17360170001560013584105287440584862408160111521564016808diff-35602932926310039133271444517130143811035610675-1097-3865