What are the differences between these two types of compressors?
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I read in the documents that there are 2 compressors: one hydrogen circulation compressor of the back-pressure type with a back pressure of 3.5 MPa and steam pressure of 1.0 MPa, and one booster compressor that is a centrifugal compressor driven by a condensing turbine at 3.5 MPa； The cooling method for the condensing turbine is air cooling. Both the cycle hydrogen compressor and the booster are powered by 3.5 Mpa steam; does one of them produce 1.0 Mpa of steam? One that produces condensate water? I don’t understand. Please explain, thank you
Turbines are classified into back-pressure type and fully condensed type, based on the exhaust pressure of the steam after it has done work. In the back-pressure type, the steam discharged from the turbine has a certain pressure and can be sent to external pipelines for other uses. In the fully condensed type, the exhaust pressure is essentially negative; the steam must be completely condensed into water before it can be recovered