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kW to cfm's

kW to cfm's
by Weary on 11/10/05 at 14:32:16

I need to convert kW to cfm's. I have a heat source that throws off 150kW’s of heat. How many cfm’s do I need to pull out of the room?

Re: kW to cfm's
by Robert Fogt on 11/11/05 at 02:43:48

I don't see a direct relationship between power and flow rate.

I assume you're trying to reduce the temperature of the room a certain amount? Probably would depend on too many other factors, such as the size of the room, current temperature, temperature of the air coming in, location of the fans, etc.

Re: kW to cfm's
by Kevin Reed on 11/11/05 at 03:49:01

[quote author=Weary link=board=general;num=1131651136;start=0#0 date=11/10/05 at 14:32:16]I need to convert kW to cfm's. I have a heat source that throws off 150kW’s of heat. How many cfm’s do I need to pull out of the room?[/quote]

I take it you are cooling air. Convert the 150 kW to BTU (British thermal units) as these are standard to air conditioning and air heat exchangers. 150 kW = 511,821 BTU. 12,000 BTU = 1 Ton of air conditionng capacity. Divide your BTU by 12,000 to get  42.65 Tons of Air conditioning is equal to the enegry you produce at 150 kW of heat.      A typical Air Comditioning system uses 400 CFM per ton of air conditioning. So I guess your answer is 150 kW = 511,821 BTU = 42.65 Tons  (Air Conditioning) , 42.65 Ton X 400 cfm/Ton= 17060 cfm  to cool 150 kW

;D

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