22-23 October 2012 Trondheim, Norway

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1 22-23 October 2012 Trondheim, Norway

2 Scope of the presentation Increasingly, architects and builders are opting for passive solutions in their designs. This is the approach enshrined in the Passive House Standard. The presentation outlines a new dynamic insulation (DI) technology that can be used in passive as well as active building designs. This affordable, sustainable technology can dramatically cut energy use and carbon emissions from buildings in both cold and hot climates. It is a technology for all seasons.

3 What is DI? From SAP Appendix Q Dynamic insulation (DI) is a configuration of insulation materials that enables incoming ventilation air to be passed through the insulation before entering the dwelling. By preheating the ventilation air, the heat loss via conduction of the dynamic insulation is reduced and when considered as a system, the net heat loss is also reduced.

4 NPL s guarded hot box

5 Dynamic U-value (1) (1) TYPE-II permeodynamic insulation.

6 Early adopter trials (UK)

7 Early adopter trials (UAE)

8 Introduction to VSDI With Void Space Dynamic Insulation (VSDI), any flat sheet insulation product can be readily and cost effectively used to dynamically insulate any building envelope or facade. A special VSDI fixing / air distribution component is used to form an inplane void between the layer(s) of insulation. The key features of VSDI are (a) uniform, bi-directional airflow through the entire wall area, (b) simple, robust installation, (c) passive performance, and (d) low cost. These are unique features that allow full envelope coverage, and with it maximum energy efficiency and carbon reduction to be achieved at minimum cost in all building types.

9 The VSDI concept Insulation sheet #2 Insulation sheet #1 Outer leaf Sheet-type VSDI spacer Inner leaf Air inlet

10 Technical evaluation VSDI sheet spacer VSDI trapezoid bar VSDI fluted bar

11 Technical evaluation 3m x 3.6m Full fill VSDI walls 3m x 7.2m Full fill VSDI walls... etc.

12 VSDI wall model

13 Airflow optimisation (2) (2) Taken from flow simulation fs14h-di1c of the Q1-140 randomised profile dyinso spacer sheet.

14 Airflow optimisation (2) (2) Taken from flow simulation fs15h-di1c of the P1-140 randomised profile dyinso spacer sheet.

15 FF-3600 results

16 U-Value (W/m2K) FF-3600 results Plain, BI Plain Al, QH P1-Q4, QH P1 Misc, QH Conv / Static Static Model Plain, QH P1 Grids, BI P1 Win, QH P1-Q4, HR, QH P1 Pass, QH DI Theory Case Names

17 Comparative performance

18 Comparative performance (3) (3) 2 x 50 mm phenolic insulation sheets + 20 mm TRZ void spacer.

19 Comparative performance (3) (3) 2 x 50 mm phenolic insulation sheets + 20 mm TRZ void spacer.

20 Dynamic heat flux pattern (4) (4) Full-fill 3600x2600 VSDI wall at va = 0.5 litres/m2s, T=20oC.

21 Simple building model 5(w) 5(d) 2.6(h) m internal dimensions, 250 mm thick concrete VSDI wall (50 mm void)

22 Simple building model 5(w) 5(d) 2.6(h) m internal dimensions, 250 mm thick concrete VSDI wall (50 mm void)

23 Simple building model Supply air Exhaust air Concrete rainscreen envelope (100 mm) Void space / plane (50 mm) Insulated drywall lining (100 mm) U s = 0.40 W/m 2 K

24 Simple building model

25 Active simulation results - HC

26 Active simulation results - HC

27 Passive simulation results - HC

28 Active simulation results - CC

29 Active simulation results - CC

30 Passive simulation results - CC

31 Concluding remarks VSDI is a compelling energy efficiency technology that works equally well in hot (summer) and cold (winter) climates. The performance of VSDI in cold seasons can benefit from solar gain. This is less so in hot seasons, where the effects of solar gain are mitigated to an extent. Active and passive VSDI can provide very significant reductions in building fabric energy use and carbon emissions. Computer simulation results show that passive VSDI has promise, so further research, including full scale monitored building trials, is warranted.

32 Concluding remarks VSDI should be easy to implement in current building practice, to improve energy efficiency and gain valuable regulatory credits. It can be used alone, as part of an active solution, or with passive, low energy and renewable technologies. VSDI, which was conceived in the spirit of the Passive House Standard, is the ideal solution for both new build and retrofit applications. An FP7-WP2013 proposal to investigate and further develop the use of VSDI is in preparation. RD&D cooperation with specifiers, developers, builders and manufacturers is invited.

33 dyinso datasheets

34 Contact information Dr Mohammed Salah-Eldin Imbabi School of Engineering, Fraser Noble Building University of Aberdeen, Aberdeen AB24 3UE

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