Practice Exercise: Building Envelope Systems

Your Name
Van Marcke, Albertine
  1. baseline scenario

When opening insight and changing the operating schedule to 12/5 and the roof construction to R38, the energy use intensity was 43.3 kBtu/ft2/year. I am

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  1. Building envelope choices
  • Wall construction: from 43.3 to 39.7 using R38 wood
  • As can be seen in the image below, the WWR, window shades and Glass do not seem to have a significant impact on the EUI, probably because this model does not include windows
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  1. Power and Lightning measures
  • Plug load efficiency to 0.6W/sf: reduced the EUI from 39.7 to 35.1
  • Lightning efficiency: by improving the efficiency to 0.3 W/sf the EUI is lowered from 35.1 to 31.7
  • Day lighting & Occupancy Controls: by introducing both: EUI = 31.4 kBtu/ft2/year
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  1. PV panels
  • Surface coverage: a 90% coverage improves the EUI from 31.4 to 18.9 kBtu/ft2/year
  • Panel Efficiency: an efficiency of 20.4% lowers the EUI to 16.0 kBtu/ft2/year
  • Payback limit: increasing the payback limit to 30 years gives a final EUI of -10.4
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