Air enters a two-stage compressor at 100 kPa and 278C and

Chapter 7, Problem 7191

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Air enters a two-stage compressor at 100 kPa and 278C and is compressed to 625 kPa. The pressure ratio across each stage is the same, and the air is cooled to the initial temperature between the two stages. Assuming the compression process to be isentropic, determine the power input to the compressor for a mass flow rate of 0.15 kg/s. What would your answer be if only one stage of compression were used?

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