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Temp. Approach For Shell And Tube Heat Exchanger.

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#1 Takechi


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Posted 30 June 2018 - 10:19 AM

Dear all simulation expert


When I do the basic design stage, what is the minimum temp approach should I use for shell and tube heat exchanger design.


Best regard,


#2 Saml


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Posted 30 June 2018 - 02:54 PM

It is not a question about simulation.  It is about economics.

The higher the energy cost, the lower the approach.

The higher the financial cost for your project, the more you focus on reducing equipment cost and less in ongoing efficiency.

The higher the pressure or more exotic the exchanger material, the wider the approach.



 ->   5 °C to 10 °C for Cooling Water and near ambient temperature exchangers made of carbon steel.

 ->   1 °C or 2 °C are common in cryogenics (Air separation, LNG) since the cost of refrigeration is high



But it is you, as you specify the equipment, within the specific context of the project,  who has to define the criteria. In fact, using rules of thumb guidances on this area is not a good Idea. 

Edited by Saml, 01 July 2018 - 01:17 PM.

#3 Takechi


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Posted 01 July 2018 - 10:49 AM

Many thank for your sharing Saml. 



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