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santoshmit
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India - Member - New Member

Join Date: Oct 2007
Posts: 20

Pressure Drop in Heat Exchanger

07/23/2009 12:15 AM

Dear all can any one tell me the what will be the effect on delta P if nos of plate incraeses in a plate type heat exchanger

is there any formula to calculate the exact pressure drop

thx in advance
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: Pressure drop in plate type heat exchanger

07/23/2009 3:45 AM

If the flowrate through the unit stays the same, the number of pathways through the exchange increases when adding plates, so the pressure drop reduces. However, there is a pay-off. With lower pressure drop the velocity between plates reduces, which reduces the turbulence, which reduces the heat exchange per plate.

The best advice would be to discuss the proposal with the manufacturer, who will have experience of applying the products across a wide range of applications and will be in the best position to advise.

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Tim in Mexico
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#2
In reply to #1

Re: Pressure drop in plate type heat exchanger

07/25/2009 7:49 AM

I would think the pressure drop increases rather than reduces when adding plates huh?

By the way PWSlack, what is that thing pictured in your aviator anyway???
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sb
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Join Date: Mar 2007
Posts: 2550
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#3
In reply to #2

Re: Pressure drop in plate type heat exchanger

07/25/2009 8:03 AM

PWS is right.

More plate means also the size of the HE is increasing (you do not insert plates in between rather at the end. So more crossection for fluid.

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