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Sizing S&t Ex In Hysys


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#1 grduran12

grduran12

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Posted 14 August 2019 - 01:46 PM

Hello,

 

I setup my heat exchanger on hysys as a condenser for a the overhead products of a distillation column, once I reached convergence, I got an  AEL exchanger with 160 tubes, and 60.32m2 of total area then I realized that the sizing won't change even if I modify any of the process variables (flow, temperature, pressure, etc.). Which is very odd, So I simulate another exchanger this time for the reboiler (a whole new set of configurations) and ended up with the same sizing for the condenser. Why do this happen?

 

Also, when I switch to rigorous mode with the EDR tool I choose auto-sizing, the EDR found a solution and when I choose to "accept design" and switch to main flow tab the exchanger partially loses the input data and is no longer ok, Why do this happen?

 

What should I do?

 

Thanks in advance,


Edited by grduran12, 14 August 2019 - 01:48 PM.


#2 Bobby Strain

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Posted 14 August 2019 - 06:39 PM

First, do the exchanger design as an ancillary operation, not within the main flow. Then see what happens.

 

Bobby



#3 grduran12

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Posted 15 August 2019 - 08:29 AM

First, do the exchanger design as an ancillary operation, not within the main flow. Then see what happens.

 

Bobby

Thanks for your time Bobby, 

 

I haven't heard of this ancillary operation can you tell me more about it? 



#4 Bobby Strain

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Posted 17 August 2019 - 11:37 AM

Export the column overhead vapor and use as feed to exchanger.

 

Bobby






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