local restriction (2P)
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How to model the local restriction (2P) for a specific pressure differential? Using parameters from a thermostatic expansion valve seems to not do the trick. Any other method that can be used to appropriately size this component?
P.S. Any reference would be helpful.
Yifeng Tang on 1 Jul 2022
Depending on what you mean by "a specific pressure differential":
If you just want to drop/increase the pressure, regardless of flow rate, which is quite unlikely, you can just use a pressure source with a negative pressure increase.
If you want to find the orifice area needed to achieve a certain pressure drop by a given flow, like from a data sheet, you can set up a test harness with two ends of the restriction connected to reservoirs set at the specified pressure, then watch the flowrate. Adjust the restriction area so you get the right flowrate.