Hello everyone,
I would like to simulate a heat exchanger with tear stream in aspen plus. I got convergence in shortcut mode. But when I change it into the rigorous mode, I no longer can get the convergence. I tried the following ideas to get the convergence but no luck in getting it.
1) Changed the method
2) Relaxed tolerance
3) Initialized the stream
Any idea to solve the problem will be appreciated.
Thank you in advance
Regards,
Kamalidevi
hello, In my opinion you should increase number of iteration. just go to set up and then in calculation options increase the number of iteration.
Thank you for the suggestion Abdul Wahab . I tried that too. But could not solve the issue because the initialization was poor. However I solved the issue by running the model in the dynamics.
my problem was solved just by increasing no. of iteration but can you tell me please what do you mean by initializing? besides please explain "model in dynamics"? thanks
I appreciate your enthusiasm Abdul Wahab. To converge the tear streams, we have to give correct appropriate initialization. This initialization you can find by breaking the tear open and doing trial and error analysis until the tear values are almost equal. If attaining this equality is difficult, then we can export the steady state with the tear open and run it in the dynamics by joining the tear. I hope it is understandable! For more information, you can have a look at the paper I attached.
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