How to converge. How to converge. How to converge~ A bit annoying thing, said three times
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As the title suggests, I am performing a simulation of heat pump distillation. This process has four circulating streams (atypical heat pump), three of which have converged ； For the fourth case, I calculated it in an open-loop manner, and the differences between the two were minimal; however, once I connected them together, it stopped converging! (I mean, assuming A is a cyclic flow and an initial value is applied to A in an open-loop manner, the resulting value of A is pretty much the same as the initial value; but when I connect them together, convergence does not occur.) Dear sea friends, can I solve this problem by specifying the calculation order? How did friends in similar situations end up calming down in the end? Thank you!
Increase the number of iterations; the results of the cyclic logistics are input into input (T P F). The convergence method is changed to Broyden, and there are basic cases – the convergence process is quite simple.
I think convergence should be simple, as the physical system isn’t complex and there aren’t many variables. I’ve tried all the methods you mentioned. This heat pump distillation isn’t the classic type; firstly, it’s connected to other processes, and secondly, in short, the process designed by foreigners isn’t a classical one, as there are nested circulation flows within it. Of course, the third possibility is that I haven’t found a way yet.
You can upload the process; we’ll take a look for you.