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[EnergyPlus_Support] wind speed vs electric consumption


I was doing a kind of sensitive analysis (pretty rough one).
I  changed the wind speed from 0,1,2, 3,4 to 5
to see how the wind speed affects the heat rejection (or say electric 
consumption) of window type air conditiopners
in the same building with the same schedule.

The results showed
1. During the daytime, the electic consumption (heat rejection) of air 
condioners is getting lower as the the wind speed increases.
2. At night (after sunset and before sunrise), the electic consumption 
(heat rejection) of air condioners is getting HIGHER as the the wind 
speed increase goes up. That means we need more electric consumption 
when there is  windy outside at night.

I think result 1 is reasonable, but I wonder how to explain the result 2.
do you have any ideas about that? Thank you very much.


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