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Explain the necessity of multi-staging and inter cooling in case of two stage compressor with PV diagram

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Explain the necessity of multi-staging and inter cooling in case of two stage compressor with PV diagram
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Necessity of multi staging with intercooling in air compression: The large pressure ratio gives rise in high compression ratio and high discharged temperature which produce adverse effect on the efficiency and performance of the system. In such application efficiency decreases and works done and power increases. So to get better performance and saving in work and power multi staging with intercooling is necessary.

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