A refrigerator operates on the ideal vapor-compressionrefrigeration cycle and uses refrigerant-134a as the workingfluid. The condenser operates at 300 psia and the evaporatorat 20F. If an adiabatic, reversible expansion device were availableand used to expand the liquid leaving the condenser, howmuch would the COP improve by using this device instead ofthe throttle device?

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Chapter1: Units, Trigonometry. And Vectors
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A refrigerator operates on the ideal vapor-compression
refrigeration cycle and uses refrigerant-134a as the working
fluid. The condenser operates at 300 psia and the evaporator
at 20F. If an adiabatic, reversible expansion device were available
and used to expand the liquid leaving the condenser, how
much would the COP improve by using this device instead of
the throttle device?

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