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Effect of velocity on heat exchange

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Posted by AC Me on June 11, 2008, 2:22 pm
Hi guys.

I would like to be able to calculate the effect of fluid velocity on
heat exchange. For instance, if the temperature on one side of a heat
exchanger is a constant 160 Farenheit and that on the other side is a
constant 70 Farenheit then it is fairly easy to calculate the heat
transferred through the walls of the heat exchanger assuming zero
fluid velocity and an infinite volume on the side with the lower
temperature. However if the fluid on the side with the lower
temperature is moving then the heat transferred from the source
(higher temp side) to the destination (lower temp. side) increases.
I cannot remember what formulae are used for this.
I cannot find my old thermodynamic text books.
I have not been able to locate anything suitable on the web, although
I may not be using the correct search phrases.

Can anyone point me in the right direction?

I'd appreciate any help you might be able to give.

Take care.


Posted by Morris Dovey on June 11, 2008, 2:42 pm
AC Me wrote:


Try DAGS "heat transfer"+"fluid flow"+formula -abstract

You're likely to find more than you ever wanted. :-)

Morris Dovey
DeSoto Solar
DeSoto, Iowa USA

Posted by AC Me on June 12, 2008, 8:32 pm
Thanks Morris.
You're not wrong. There's more there than I hope I'll need.

Take care.


Posted by J. Clarke on June 13, 2008, 11:04 am
 AC Me wrote:

FWIW, Amazon has used copies of "Principles of Heat Transfer" for
under a buck plus shipping.

to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)

Posted by AC Me on June 16, 2008, 10:46 pm

Thanks John.


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