High back pressure at the compressor outlet
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I have a gentle question: if the back pressure at the compressor outlet is high, will it affect the flow rate at the inlet? I installed a PSA unit for the separation of hydrogen. The gas obtained after separation enters a compressor where it is pressurized and then fed into the high-pressure gas pipeline network. Recently, the pressure in this pipeline network has been quite high, which has resulted in some of the separated gas being vented. I don’t quite understand. If you know, please explain. Thank you
High back pressure is equivalent to a smaller outlet valve, which will definitely affect the flow rate
Ask the host manufacturer for the flow-backpressure performance curve; it’s easy to see at a glance
First, we need to know what type of compressor it is?
Take a look at the compressor’s performance curve: a high outlet back pressure is equivalent to an increased pressure ratio, which results in a reduced flow rate
This post was last edited by Anhui Liu Hua on 2025-10-30 at 11:48. The back pressure is too high, which prevents an increase in flow rate; as a result, the compressor operates closer to the anti-surge zone. Increasing the vent volume is a necessary measure taken to boost the inlet flow rate
It will definitely affect the flow rate; high back pressure and high resistance mean that less of the medium will pass through