Temperature cross in evaporator

Simulate chemical processes using advanced thermodynamic models

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Temperature cross in evaporator

Forum: Open Discussion

Creator: Tanatip

Created: 2023-03-29

Updated: 2023-04-05

Tanatip - 2023-03-29

Hello, I don't know why the temperature cross scenario occurred at the evaporator. It seems like there is no chance to happen due to the temperature difference between the heat source (air 445C at evaporator inlet) and the working fluid (R1233zde 250 C at evaporator outlet)

I'm confused a lot. If anyone can help, I'll appreciate it.
Thank you in advance

R1233zde but temp cross at evaporator.dwxmz

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Frank R Brown III - 2023-03-29

Try changing the Efficiency on the Evap to something less than 100%, say 85%. That insures there is a temperature difference between the cold inlet and the hot outlet streams.

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- Tanatip - 2023-03-30
  
  I've tried by input more heat loss (cannot input efficiency) but it still not work.
  
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Daniel Medeiros - 2023-03-30

@Tanatip check this

R1233zde but temp cross at evaporator 2.dwxmz

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Anu Choudhary - 2023-04-05

I came across the same error recently along with "Recycle reached the maximum number of Iterations without converging". I am using n-pentane a s the working fluid.

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