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Compressing a gas above compressor's discharge pressure

  1. Aug 10, 2017 #1


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    A 2 stage compressor has a final delivery/discharge pressure of 250 bar.
    hydrogen is been compressed and stored in vessels.
    The pressure in the storage vessel reaches the delivery pressure(i.e.250 bar) and the compressor is still running ( vessel has a safety pressure of 450 bar) and the pressure increases above the discharge pressure of 250 bar( with the help of a no return valve).
    I want to know what effects this situation will have on the compressor's power consumption?(when the storage pressure is below and above discharge pressure)
    Would there be any energy losses?
  2. jcsd
  3. Aug 10, 2017 #2


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    Staff: Mentor

    The compressive uses more energy to pump up to a higher pressure, obviously. Some is lost as heat of compression and most of the rest is lost as inefficiency in regulating it back down to working pressure.
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