An air refrigeration cycle has a pressure ratio of 5. Air enters the compressor at (12^{circ} mathrm{C})

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An air refrigeration cycle has a pressure ratio of 5. Air enters the compressor at \(12^{\circ} \mathrm{C}\) and the turbine at \(48^{\circ} \mathrm{C}\). The mass flow rate of air is \(0.08 \mathrm{~kg} / \mathrm{s}\). Take \(C_{P}=1.007 \mathrm{~kJ} / \mathrm{kg}-\mathrm{K}\) and \(\gamma=1.4\). Determine

(a) The actual power input coefficient of performance

(b) The coefficient of performance.

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