A Carnot cycle heat pump is used to heat a living space. The working fluid is R-
134a. Heat is transferred from the refrigerant at 100°F. During this process the R-
134a changes phase from saturated vapor to saturated liquid. Heat transfer to the
R-134a occurs at 20°F. Determine the following:
i) the heat transfer to the living space (Bru/lbm)
ii) the coefficient of performance
iii) the net cycle work (Btu/lbm)
iv) the quality at the completion of the heat transfer process occurring at 20°F