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Re: heat exchangers


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Posted by David on November 16, 2003 at 08:36:37:

In Reply to: heat exchangers posted by Sean Wilson on February 07, 2002 at 14:47:54:

the amount of cooling a heat exchanger does is based soley on the diference in average temp of the "cooled" side minus average temp of the "cooling" side. If the cooling water flow is increased, a specific unit water spends less time in the heat exchanger, and therefore absorbs less heat, therefore the outlet tempurature of the cooling water doesn't get as warm. This effect lowers the average tempurature of the cooling water, therefore increasing cooling efficiency, although, as the cooling water outlet temp approaches inlet temp, increasing flow will have less and less of an effect. When your co-workers reduce flow, they feel the outlet of cooling water get warmer, and assume that that means more heat is being transfered.


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