building performance simulation (bps) software for ... · planning of energy efficiency retrofits...
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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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18/06/20014DTU, Civil Engineering, Technical University of Denmark
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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18/06/20014DTU, Civil Engineering, Technical University of Denmark
Study Goals
• Multifaceted Study - ThemainpurposeistodescribeamethodologytofacilitateBPS softwareasaperformance-baseddecision-makingtool. - The methodology is implemented and tested in a retrofitcasestudy.
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18/06/20014DTU, Civil Engineering, Technical University of Denmark
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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18/06/20014DTU, Civil Engineering, Technical University of Denmark
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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18/06/20014DTU, Civil Engineering, Technical University of Denmark
Case Study Investigations [1/4]
• Analysis of Existing Conditions - Thedwellingusedfortheretrofitcasestudyisaprecastconcrete construction,1970ssinglestoreyhouseinAlbertslund,Denmark. - Pre-retrofitbuildingsconditions:Agingwindowunits,poorinsulation, airleakage,andmouldgrowthduetosurfacecondensation.
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18/06/20014DTU, Civil Engineering, Technical University of Denmark
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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18/06/20014DTU, Civil Engineering, Technical University of Denmark
• 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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18/06/20014DTU, Civil Engineering, Technical University of Denmark
Conclusions
• Implementation of Retrofit Strategies/Actions - Inthedecision-makingprocessofselectingspecificretrofitstrategies, multipleactionsareavailable. - Therefore,adecisionsupportisneeded. - BPScanbeimplementedasaperformance-based decision-making methodology.
ThomasFænøMondrup PhDStudent
DepartmentofCivilEngineering TechnicalUniversityofDenmark
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