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zahirazam2009
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Join Date: Oct 2013
Location: CHENNAI, India.
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Heat Exchangers

11/26/2013 11:42 PM

i have a question regarding X type shell i.e. cross flow shell....

fluid comes from one end and leave from other exactly opposite side & fluid will try to follow a stream line path so will there will be fluids that remain at the corners of the shell and unable to exit?????

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Tornado
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#1

Re: heat exchangers

11/26/2013 11:50 PM

Two Maxwell's demons can fix that, one in each dead corner.

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PWSlack
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#2

Re: heat exchangers

11/27/2013 3:19 AM

That is what internal baffles are there to prevent.

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phoenix911
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#3

Re: heat exchangers

11/27/2013 5:39 AM

Sometimes the world is not perfect....... But depending if it's horonzontal or vertical mount. It will drain out. But yes there will be some what dead spots (low flow) in the HX.

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PWSlack
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#4

Re: heat exchangers

11/27/2013 6:08 AM

...which means that the turbulence in some areas will be higher as a consequence. Turbulence eases heat transfer.

The World isn't perfect. If no dead spots are a selection criterion, consider plate-and-frame heat exchangers instead.

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GMZ Ahsan
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Posts: 9
#5

Re: Heat Exchangers

11/27/2013 11:12 PM

Ensure end surfaces of shell are curved to provide sufficient turbulance & material strength. Turbulance will ensure contact of entire secondary liquid with primary circuit. Fixing baffle plates directed towards outflow is another solution
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