[Bldg-sim] "Horses mouth" question.
jra_sac at yahoo.com
Mon Oct 11 12:01:26 PDT 2010
Question on Cool Roof and the way to simulate them in eQuest.
My boss came to me with a cool roof and asked me to do a quick eQuest on it. I
did a 25,000 sf single story office in Los Angeles, saw the roof outside
emissivity was 0.9. I changed it to 0.5 and the electric usage went UP. I
change it again to 0.12 and the electric usage went up AGAIN. The HVAC is a
standard single zone pacakge unit with furnace heat.
Am I seeing reality or what am I missing?
John R. Aulbach, PE, CEM
Senior Energy Engineer
1990 E. Grand Avenue, El Segundo, CA 90245
W: 888-826-1216, X254| D: 310-765-7295 | F: 310-817-2745
www.ptrenergy.com| jaulbach at ptrenergy.com
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