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Can day-lighting controls be considered for LEED certification under “Energy & Atmosphere – Optimize Energy Performance”? If so where should the light sensor be located in the space? Is there any energy code that allows credit for day-lighting controls? The DOE2 program allows two light sensors per space. Supposing the two sensors are located 5 ft and 10 ft from the window. Is the average daylight at these two points used in determining the reduction in artificial lighting?
The DOE2 program expects zones to have 6 surfaces defined with X,Y,Z coordinates and reflectance values for day-lighting analysis. Ignoring this produces warning messages but the results show a reduction in artificial lighting energy. For day-lighting analysis we only enter into DOE2 the X,Y coordinates of the window origin relative to the wall and also the wall and window dimensions. Can we assume that the energy savings results from the DOE2 program are on the safe side (the actual energy saved is more) when we use the program without all the surfaces and coordinates?
Are there any rules for day-lighting analysis for establishing energy savings and for comparing the results from different studies?
Varkie Thomas Skidmore, Owings & Merrill LLP Tel: (312) 360-4467 (direct) =====================================================You received this e-mail because you are subscribed to the BLDG-SIM@xxxxxxxx mailing list. To unsubscribe from this mailing list send a blank message to BLDG-SIM-UNSUBSCRIBE@xxxxxxxx |