Introduction to building performance simulation

Transcription

1 Introduction to building performance simulation prof.dr.ir.. Jan Hensen Czech Technical University in Prague Faculty of Mechanical Engineering Environmental Engineering Eindhoven University of Technology

2 Agenda Background Need for integrated approach of building and systems Building performance simulation Conclusions and future work

3 Agenda Background Need for integrated approach of building and systems Building performance simulation Conclusions and future work

4 Background importance of HVAC (heating, ventilation and air-conditioning) We spend 90% of our life in buildings

5 Background importance of HVAC We spend 90% of our life in buildings ~60% of national gross domestic product (GDP) is produced in buildings (NL)

6 Background importance of HVAC We spend 90% of our life in buildings ~60% of GDP is produced in buildings (NL) Building energy consumption 30 40% national total

7 Background importance of HVAC We spend 90% of our life in buildings ~60% of GDP is produced in buildings (NL) Building energy consumption 30 40% national total 5 10% of building costs = HVAC - domestic

8 Background importance of HVAC We spend 90% of our life in buildings ~60% of GDP is produced in buildings (NL) Building energy consumption 30 40% national total 5 10% of building costs = HVAC - domestic 30 50% of building costs = HVAC - commercial

9 Background complexity of buildings The built environment is becoming increasingly complex due to interacting economical, environmental and social developments:

10 Background complexity of buildings The built environment is becoming increasingly complex due to interacting economical, environmental and social developments: Awareness and demand for better quality of the indoor environment (health, comfort, productivity)

11 Background complexity of buildings The built environment is becoming increasingly complex due to interacting economical, environmental and social developments: Awareness and demand for better quality of the indoor environment (health, comfort, productivity) Buildings often contain a mix of functions (working, living, shopping, leisure, )

12 Background complexity of buildings The built environment is becoming increasingly complex due to interacting economical, environmental and social developments: Awareness and demand for better quality of the indoor environment (health, comfort, productivity) Buildings often contain a mix of functions (working, living, shopping, leisure, ) New buildings should be flexible, adaptable (teleworking( teleworking, hotdesking, )) and robust (organizational + climate changes)

13 Background complexity of buildings Built environment is increasing in complexity due to interacting economical, environmental and social developments: Awareness and demand for better quality of the indoor environment (health, comfort, productivity) Buildings often contain a mix of functions (working, living, shopping, leisure, ) New buildings should be flexible, adaptable (teleworking( teleworking, hotdesking, )) and robust (organizational + climate changes) Internationalization and industrialization of construction industry (design & build, IFD,...)

14 Agenda Background Need for integrated approach of building and systems Building energy modelling and simulation Conclusions and future work

15 Need for integrated approach

16 Need for integrated approach Energy costs: 8 35 euro/m 2 floor - typical office design Energy costs: 5 25 euro/m 2 floor - good practice design

17 Need for integrated approach Energy costs: 8 35 euro/m 2 floor - typical office design Energy costs: 5 25 euro/m 2 floor - good practice design In EU office salary costs ~400 euro/m 2 floor; What about saving due to 10% 10% higher productivity because of better indoor environment?

18 Need for integrated approach Energy costs: 8 35 euro/m 2 floor - typical office design Energy costs: 5 25 euro/m 2 floor - good practice design In EU office salary costs ~400 euro/m 2 floor; What about saving due to 10% 10% higher productivity because of better indoor environment? What about saving in national medical expenses if healthy life could be improved by 10% 10% because of better indoor environment?

19 Need for integrated approach Energy costs: 8 35 euro/m 2 floor - typical office design Energy costs: 5 25 euro/m 2 floor - good practice design In EU office salary costs ~400 euro/m 2 floor; What about saving due to 10% 10% higher productivity because of better indoor environment? What about saving in national medical expenses if healthy life could be improved by 10% 10% because of better indoor environment? What about reduction in global warming if we can reduce fossil fuel usage by increasing renewable energy applications in buildings and systems?

20 Need for integrated approach building = system system = building luchtbehandeling afzuigkanaal afzuiging inblaas enkel glas dubbel glas binnen glazenwas balkon

21 Need for integrated approach collaborative engineering: everybody together at the same time towards a common goal

22 Agenda Background Need for integrated approach of building and systems Building performance simulation Conclusions and future work

23 Building performance simulation Using a (computer) model (= virtual building) to predict what will happen in the real world

24 Building performance simulation Using a (computer) model (= virtual building) to predict what will happen in the real world

25 Building performance simulation Using a (computer) model (= virtual building) to predict what will happen in the real world Iterative process involving: Creation of model, including analysis of building (existing or design) and model calibration

26 Building performance simulation Creation of model, including analysis of building (existing or design) and model calibration

27 Building performance simulation Using a (computer) model (= virtual building) to predict what will happen in the real world Iterative process involving: Creation of model, including analysis of building (existing or design) and model calibration Simulation with (design) relevant boundary conditions

28 Building performance simulation Using a (computer) model (= virtual building) to predict what will happen in the real world Iterative process involving: Creation of model, including analysis of building (existing or design) and model calibration Simulation with (design) relevant boundary conditions Multi-variate analysis of simulation results and extraction of relevant design information

29 Building performance simulation Multi-variate analysis of simulation results and extraction of relevant design information

30 typically: deterministic, time-discretized, finite volume, 1 st principle conservation based, state-space models of whole building Building performance simulation

31 Agenda Background Need for integrated approach of building and HVAC systems Building performance simulation Conclusions and future work

32 Conclusions and future work Simulation will soon be used more in practice because: E + IEQ performance based standards Promotion by ASHRAE, IBPSA (NVL), Specialized practices offering simulation services Training, professional development and incorporation in curricula of higher education Introduction and capita selecta of building performance simulation Projectwork

33 Conclusions and future work Future work to remove barriers in application: Quality assurance: (automatic) uncertainty analysis validation and calibration procedures Program inter-operability Program development on task-sharing sharing basis Application earlier in (conceptual) design and after building is completed (commissioning, control, auditing, )

34 Conclusions and future work Integrated approach of building and (HVAC) systems needs capable people (designers) and (software) tools People and tools will likely have specializations For an integrated approach it is essential that people and tools will be able to to deliver quality to communicate to co-operate operate

35 Finally The best way to predict the future is to create it