Is the compression ratio of a piston compressor related to the inlet pressure?

2016-07-01View Original

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In a two-stage piston compressor, flow rate is controlled by forcing the intake valve to allow some of the air to return to the intake pipe without being compressed, thereby regulating pressure. Assuming the outlet pressure at the first stage is 1.0 Mpa, the opening degree of the exhaust valve at the second stage is 50%, and the compression ratio at the second stage is 1.3, if the opening degree of the exhaust valve at the first stage is adjusted so that the outlet pressure at that stage becomes 1.1 Mpa, while keeping the exhaust valve at the second stage unchanged, will the compression ratio at the second stage change? If so, will it increase or decrease?

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Is the compression ratio of a piston compressor related to the inlet pressure?

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