At steady state, a reversible refrigeration cycle discharges energy at the rate QH to a hot reservoir at temperature TH, while receiving energy at the rate QC from a cold reservoir at temperature TC. a. If TH = 13°C and TC = 2°C, determine the coefficient of performance. b. If QH = = 10.5 kW, 8.75 kW QC , and TC = 0°C, determine TH, in °C. c. If the coefficien

a) , b)

Explanation:

a) The coefficient of performance of a reversible refrigeration cycle is:

Temperatures must be written on absolute scales (Kelvin for SI units, Rankine for Imperial units)

b) The respective coefficient of performance is determined:

But:

The temperature at hot reservoir is found with some algebraic help:

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explanation:

answer:

(b)

explanation: