2 points Save Answer The gas refrigeration cycles have lower COPs relative to the vapor-compression refrigeration cycles or the reversed Carnot cycle. True False
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COP is a measure of a refrigerator's efficiency, defined as the ratio of the refrigeration effect to the work input. Show more…
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Consider two vapor-compression refrigeration cycles. The refrigerant enters the throttling valve as a saturated liquid at $30^{\circ} \mathrm{C}$ in one cycle and as subcooled liquid at $30^{\circ} \mathrm{C}$ in the other one. The evaporator pressure for both cycles is the same. Which cycle do you think will have a higher COP?
How does the COP of a cascade refrigeration system compare to the COP of a simple vapor-compression cycle operating between the same pressure limits?
Does a refrigerator that has a higher COP necessarily have a higher second-law efficiency than one with a lower COP? Explain.
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