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Air within a piston cylinder assembly executes a Carnot refrigeration cycle between hot and cold reservoirs...

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Mechanical Engineering

Air within a piston cylinder assembly executes a Carnotrefrigeration cycle between hot and cold reservoirs at TH=500 K andTC=300 K, respectively. The magnitude of the heat transfer rejectedto the high temperature reservoir is 250 kJ per kg of air. Thepressure at the start of the isothermal expansion is 325 kPa. Theair can be modeled as an ideal gas with constant specificheat.
For the air as a system, determine
a. (5) the coefficient of performance.
b. (5) the net work input to the cycle in kJ/kg.
c. (10) the Pv and Ts diagrams for the cycle with arrows showingthe directions of the processes.

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