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A refrigeration cycle absorbs 20,000 kJ/h of heat from a space maintained at -45oC and rejects...

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Mechanical Engineering

A refrigeration cycle absorbs 20,000 kJ/h of heat from a spacemaintained at -45oC and rejects heat to the surroundingair at 30oC.
i. Determine the actual power input to the refrigeration cycle ifthe coefficient of performance (COP) of the refrigeration cycle is25% of that of a reversible refrigerating cycle operating betweenthe same two temperature reservoirs (kW).
ii. Determine the minimum work input to the refrigeration cycle(kW).
iii. Will the heat rejected to the surrounding by the actualrefrigeration be greater, smaller or the same as the heat rejectedto the surrounding by the reversible refrigeration cycle?

Answer & Explanation Solved by verified expert
3.6 Ratings (358 Votes)
Ansi For reversible refrigerating cycle COPrev T2 T1 T2 228 303 228 304For actual cycle COPactual 25 ofCOPrev 025 304 076Also COPactual Q2    See Answer
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