Benjamin,
I agree that shading with an air gap above the roof should reduce the cooling load and also agree that expect more than ~2.54% reduction in cooling load which is seen here for 6" air gap. May be someone else can enlighten us with the results.
Thanks,
Chandan
On 8/26/2014 11:48 PM,
benjamin_khuong@xxxxxxxxx [EnergyPlus_Support] wrote:
Chandan,
Yes I did just that, I ran simulations with an air gap of 0, 6", 1', 1'6", and 2'. As the overhang went higher the annual cooling load decreased. I'm assuming that is due to the loss of shading over the south side of the house.
But shouldn't there be a bigger difference from having no air gap to a 6" air gap.With no Air gap the roof of the home is being directly heated by the sun but with a 6" air gap the roof of the entire roof of the home is being shaded.
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Posted by: Chandan Sharma <chandangsharma@xxxxxxxxx>
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