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Building Performance Simulation (BPS) Software for Planning of Energy EfficiencyRetrofits

Mondrup, Thomas Fænø; Karlshøj, Jan; Vestergaard, Flemming

Publication date:2015

Document VersionPeer reviewed version

Link back to DTU Orbit

Citation (APA):Mondrup, T. F., Karlshøj, J., & Vestergaard, F. (2015). Building Performance Simulation (BPS) Software forPlanning of Energy Efficiency Retrofits [Sound/Visual production (digital)]. 10th Nordic Symposium on BuildingPhysics, Lund, Sweden, 15/06/2014

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for Planning of Energy Efficiency RetrofitsBuilding Performance Simulation (BPS) Software

Thomas Fænø Mondrup, Jan Karlshøj, and Flemming VestergaardDepartment of Civil Engineering, DTU, Denmark

Session: Retrofitting of Buildings II, Paper Nr: 15210th Nordic Symposium on Building Physics (NSB 2014) Lund, Sweden, 15-19 June 2014

18/06/20014DTU, Civil Engineering, Technical University of Denmark

Index

• Study Background• Study Goals• Case Study- (a) Framework

- (b) Methodology

- (c)Investigations[1-4]

• Conclusions

NSB‘14

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Study Background

• Selecting Retrofit Strategies - Whenplanningaretrofit,multipleperformancestrategiesandactions has to be considered. - Howtoselectthemostappropriateretrofitstrategy/actions? - Adecisionsupportmethodologyisneeded. - Possiblesolution:ImplementingBuildingPerformanceSimulation(BPS) softwareasaperformance-baseddecision-makingtool.

Strategy 2: Building systemsand installations

Strategy 1: Building envelopeand design aspects

Strategy 3: Building servicesand management tools

Actions: Insulation upgrades, air leakage reduction, improvement of doors and windows, control and exploitation of solar gain and daylight, etc.

Actions: Monitor and control of the building during operation, utilization of metering services, clock controls, sensors, etc.

Actions: Installation of high-e�ciency HVAC systems, improvement of electrical lighting systems, improvement of domestic appliances, installation of renewable energy, etc.

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Study Goals

• Multifaceted Study - ThemainpurposeistodescribeamethodologytofacilitateBPS softwareasaperformance-baseddecision-makingtool. - The methodology is implemented and tested in a retrofitcasestudy.

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Case Study Framework

• Gate 21 Pilot Project - ThecasestudyisdirectedtowardstheGate21pilotproject”Building EnvelopeRetrofits:RetrofittingofDanishSocialHousing”. - Thecasestudyaimstodevelopmultipleexemplarbuildingenvelope retrofitactions,whichcanbeadoptedintofutureprojects. - ThecasestudyfocusesonintegratingBPSsasaperformance-based decision-supporttool.

• Clients Requirements - Theclient(Gate21)wishestodevelopbuildingenveloperetrofitactions optimizedforsolarradiationanddaylightexploitation. - Retrofittingfocus:Investigatingdifferentbuildingenvelopedesign variables,particularly,differentwindowpositions,sizes,andshapes.

DEN EUROPÆISKEUNIONDen EuropæiskeFond forRegionaludvikling

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Case Study Methodology

• Simulation-based process - Thesimulation-basedretrofitdesignprocessconsistsofthreephases: (1)Analysisofexistingconditions (2)Developmentofretrofitstrategies/actions(+evaluation) (3)Implementationofretrofitstrategies/actions

OptimizedDesign

Existingconditions

Phase 2: Based on existing conditions, multiple retro�t strategies/actions are developed and evaluated against prede�ned performance criteria.

//////////////////////////////////////////////////////////////////////////////////////////Phase 3: The �nal step is to construct and implement the proposed retro�t strategies/actions, hereby improving the overall building performance.

Phase 1: First step is to understand existing conditions, current requirements, limitations, project site context, etc.

Deployment of proposalsInformation exchange

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Case Study Investigations [1/4]

• Analysis of Existing Conditions - Thedwellingusedfortheretrofitcasestudyisaprecastconcrete construction,1970ssinglestoreyhouseinAlbertslund,Denmark. - Pre-retrofitbuildingsconditions:Agingwindowunits,poorinsulation, airleakage,andmouldgrowthduetosurfacecondensation.

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Case Study Investigations [2/4]

• Development of Retrofit Strategies/Actions - Retrofitactionsfocusoninvestigatingselectedbuildingenvelopedesign variables:Alternativewindowpositions,sizes,andshapes. - Listofretrofitactions: Action (0): Existing conditions Action (1): Energy efficient windows Action(2):Energyefficientwindows+increasedwindowwidth Action(3):Energyefficientwindows+increasedwindowheight Action(4):Energyefficientwindows+extrawindowsectionatpatiodoors Action(5):Energyefficientwindows+doublepatiodoors Action(6):Energyefficientwindows+smallskylightinlivingroom Action (7): Energy efficient windows + large skylight in living room Action(8):Energyefficientwindows+extrawindowsectioninlivingroom Action(9):Energyefficientwindows+extrawindowsectioninmasterbedroom

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• Development of Retrofit Strategies/Actions - BPSsoftwareisusedtoinvestigatetheretrofitactions;simulationofinterior solargainsanddaylightdistribution[performedinIESVE]. HERE: Average annual solar gains and daylight distribution, mapped over existing conditions, Action 1, and Action 7, contour range 40-760 LUX.

Case Study Investigations [3/4]

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EXISTINGFIGURES, LIVING ROOMSOLAR GAIN = 352 kWh/yr

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EE WINDOWSFIGURES, LIVING ROOMSOLAR GAIN = 530 kWh/yr

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SKYLIGHTFIGURES, LIVING ROOMSOLAR GAIN = 862 kWh/yr

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Action 0

Action 1

Action 2

Action 3

Action 4

Action 5

Action 6

Action 7

Action 8

Action 9

#Existing conditions

#Energy ef�icient windows

#Window width

#Window height

#Windows at patio doors

#Double patio doors

#Small skylight, living room

#Large skylight, living room

#Window section, living room

#Window section, master bedroom

1

1 2 3

1 2

1 2 3

1 2 3

1 2 3

1 2 3 4

4

5

51 2 3 4

1 2 3 4

41 2 3

45

Case Study Investigations [4/4]

• Implementation of Retrofit Strategies/Actions - Theclientshouldselectspecificretrofitactionswithinthe developedsolutionspace.

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Conclusions

• Implementation of Retrofit Strategies/Actions - Inthedecision-makingprocessofselectingspecificretrofitstrategies, multipleactionsareavailable. - Therefore,adecisionsupportisneeded. - BPScanbeimplementedasaperformance-based decision-making methodology.

ThomasFænøMondrup PhDStudent

DepartmentofCivilEngineering TechnicalUniversityofDenmark

M:tfmo@byg.dtu.dk

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