Simscape how to set up a multi-process evaporator or condenser

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Ke 2023-9-7

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评论： Ke 2023-9-20

Hello, I want to create a parallel flow microchannel condenser with four processes but there doesn't seem to be a similar module in simscape, what should I do.

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Yifeng Tang 2023-9-8

Could you please clarify what you mean by "four processes". Is that four passes where the refrigerant zig-zag two times?

What about the external fluid? You mentioned "parallel flow" but I am not sure if it's about the refrigerant channels being parallel to each other or the external fluid (air?) flow in parallel with the refrigerant. The latter feels uncommon. I usually see air flow perpendicular to the refrigerant flow.

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Yifeng Tang 2023-9-11

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The architecture looks right: refrigerant in series and air flow in parallel, like the actual heat exchanger.

A few things to pay attention to, based on my past experience with this type of heat exchanger:

pay attention to the air flow through each pass and make sure the flow rate is proportional to the overall cross section area
if necessary, you may add some volume between the passes, to represent the "collector" volumes that may exist at the two sides of the passes
start with maybe two passes, by bundling some together, and gradually increase the passes. Observe any difference in results and simulation speed.

Good luck and happy modeling.

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Yifeng Tang 2023-9-19

You are right. There isn't a geometry-based 2P-2P Heat Exchanger yet. Is this for an intercooler in a refrigeration system? You'll most likely need to build one from some foundation blocks, if the system-level one won't be sufficient for your engineering purpose.

It may make sense if you can put this question as a new question, as it is a separate one from the original one. This way, more people may see it and learn. I'll try to provide more details there.

Ke 2023-9-20