When ASPEN EDR is used to design and calculate heat exchangers, the following error message appears
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During the design and calculation of the ASPEN EDR heat exchanger, an error message as shown in the figure appeared; several solutions were tried, but the issue has not been resolved to date
There’s a temperature crossover; let’s see if too much heat needs to be exchanged
This issue occurs when connecting to EDR directly via an interface from Aspen； When another method is chosen, that is, generating the psf file first and then importing it into EDR, this error does not occur.
This issue occurs when connecting to EDR directly via an interface from Aspen； When another method is chosen, that is, generating the psf file first and then importing it into EDR, this error does not occur.
What do you mean by directly using the interface, and how is it done? Furthermore, this kind of problem is very likely caused by a phase change and inconsistent calculation methods on both sides
Yes, hot streams involve phase changes； Could you please explain how to improve it specifically? Thank you
A preliminary look shows that the minimum pressure of the hot fluid as you’ve specified is 0.035 bar, while the pressure drop on the hot side of your heat exchanger is quite high, dropping to 0.02 bar. In such cases, it’s necessary to use extrapolation for the property values; the extrapolated temperature comes out to -13°C, so it’s unlikely there won’t be errors. There are also issues with the settings: you’ve set the temperature on the hot side to 14°C and Vapor to 1, which may lead to problems in the property calculations. Also, your export method is quite strange – why is there no flow rate during the beta test? It is best to use the Aspen environment, to perform a precise calculation for the heat exchanger area, and then specify the path where the EDR file should be saved; this export method is preferable.
A simple heat exchanger with a single flow stream is used in the Aspen simulation file； What is exported are the physical property parameters of the heat flux stream. Public utility condensation is used, and the process conditions are known and entered manually; the cold flow rate you mentioned can be calculated by the software. Previously, I would create the PSF file first and then import it into EDR, and I never encountered this kind of problem before. It seems convenient to use the interface directly from ASPEN to connect to EDR; I tried this approach and ran into the problem I’m facing now.