A gas refrigeration cycle with a pressure ratio of four uses air as the working fluid. Air enters…

A gas refrigeration cycle with a pressure ratio of four uses air as the working fluid. Air enters the compressor at 100 kPa and 0 ?C and the turbine at 50 ?C. The isentropic efficiencies of the compressor and turbine are 84%. Determine (a) the temperature at the turbine exit, (b) the heat removed per unit mass of the air, and (c) the COP of the cycle. Use constant specific heat for air at room temperature with cp = 1.005 kJ/kg·K and k = 1.4

 

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