Hello, can someone please advise me whether the typical fan / affinity laws for centrifugal compressors are valid for varying suction conditions.
For context, the manufacturer has provided the performance curve with X = Inlet Volumetric Flow, Y = Polytropic Head, Z = Shaft Speed at compressor suction pressure of 10,000 kPa. Is this curve still valid for compressor suction pressure of 5,000 kPa and can I apply fan laws to evaluate compressor performance at the lower suction pressure.
Obviously inlet volumetric flowrate will change due to the change in gas density, however, I'm not sure whether the performance curve is still valid given the manufacturer has only supplied 1 set of curves at 10,000 kPa suction.
If the performance curve is not valid at 5,000 kPa suction, can I use HYSYS to extrapolate and generate a new performance curve for me from the original.
Thanks in advance
Edited by SickPuppy0, 25 January 2023 - 05:00 AM.