How to determine the compression stages using the reciprocating machine parameters in the figure below?
Thread Content
Could some expert give me some ideas? Are the conditions sufficient? I always feel that it would be fine if I just had an exhaust temperature sensor.
The molecular weight is 2.16; the medium is hydrogen. The inlet pressure is 2.05 MPa, while the outlet pressure is 10.9 MPa, giving a pressure ratio of 5.2. A single stage is definitely not sufficient; generally, two stages are appropriate
Hydrogen primarily controls the exhaust temperature, with a standard value of 135°C; however, larger design firms tend to be more conservative. Additionally, there are fluctuations in pressure during operation, so it is better to keep the temperature around 120°C. The pressure ratio for fresh hydrogen is generally around 2. The adiabatic temperature of your parameter is already close to 130; the temperature is expected to be even higher, and stage 3 compression will yield better results. Of course, if the inlet pressure is increased a bit, 2-stage compression can also be considered.