UPS Battery Room cooling
UPS Battery Room cooling
(OP)
thread658-338980: Re: Heat dissipation calculation
I came across the same problem today. We were provided with the battery heat rejection data on a 15 minute and a 2 hour time frame in terms of btu/hr. The math is simple enough, and the heat balance is simple enough. However we have nothing to compare the design to in order to validate the cooling requirements. For example, 165 batteries, gel-cel, 2-hours at 110 btu/hr each = 18,150 btu/hr ~ 1.5 tons cooling, but at 15 minutes the heat rejection is much higher, approx. 600 btu/hr ~8.3 tons. I have to assume that the heat rejection is not internal to the battery itself, but to the ambient environment. Does anyone have a different opinion and other reasoning on this issue?
I came across the same problem today. We were provided with the battery heat rejection data on a 15 minute and a 2 hour time frame in terms of btu/hr. The math is simple enough, and the heat balance is simple enough. However we have nothing to compare the design to in order to validate the cooling requirements. For example, 165 batteries, gel-cel, 2-hours at 110 btu/hr each = 18,150 btu/hr ~ 1.5 tons cooling, but at 15 minutes the heat rejection is much higher, approx. 600 btu/hr ~8.3 tons. I have to assume that the heat rejection is not internal to the battery itself, but to the ambient environment. Does anyone have a different opinion and other reasoning on this issue?





RE: UPS Battery Room cooling
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