HW14 - L =-20 ° C Process C Isothermal heat removal at-20...

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Spring 2006 1 ME 201 Thermodynamics Homework 14, Due Wednesday, 3/22/2006 1. Consider the Carnot cycle occurring in a piston-cylinder device containing refrigerant-134a with operating conditions given below: Process A: Isothermal heat addition at T H = 30 ° C to convert saturated liquid to saturated vapor Process B: Isentropic and adiabatic expansion to T
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Unformatted text preview: L = -20 ° C Process C: Isothermal heat removal at -20 ° C Process D: Isentropic and adiabatic compression back to the initial state With R-134a as the working fluid for this cycle calculate the thermal efficiency using η th net in = W Q Compare this to the ideal Carnot cycle efficiency given by η Carnot L H = 1 - T T...
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