A Carnot vapor refrigeration cycle operates between thermal reservoirs at 40oF and 100oF. For (a) R-12, (b)

Question:

A Carnot vapor refrigeration cycle operates between thermal reservoirs at 40oF and 100oF. For (a) R-12, (b) R-134a, (c) water, (d) R-22 and (e) ammonia as the working fluid, determine the operating pressures in the condenser and evaporator, in lbf/in2, and the coefficient of performance.