(Solved): Components of a heat pump for supplying heated air to a dwelling are shown in the schematic below. ...

Components of a heat pump for supplying heated air to a dwelling are shown in the schematic below. At steady state, Refrigerant(R-134a) enters the compressor at -20 \( { }^{\circ} \mathrm{C} \),as a staurted vapor and is compressed adiabatically to \( 75^{\circ} \mathrm{C}, 10 \) bar. From the compressor, the refrigerant passes through the condenser, where it condenses to liquid at \( 28^{\circ} \mathrm{C}, 10 \) bar. The refrigerant then expands through a throttling valve such that. The states of the refrigerant are shown on the accompanying Figure \( 4(\mathrm{~T}-\mathrm{s} \) diagram). Return air from the dwelling enters the condenser at \( 20^{\circ} \mathrm{C}, 1 \) bar with a volumetric flow rate of \( 0.42 \mathrm{~m}^{3} / \mathrm{s} \) and exits at \( 50^{\circ} \mathrm{C} \) with a negligible change in pressure. Using the ideal gas model for the air and neglecting kinetic and potential energy effects. Deterrmine: (a) the rates of entropy production, in \( \mathrm{kW} / \mathrm{K} \), for control volumes enclosing the condenser, compressor, and expansion valve, respectively. (b) Discuss the sources of irreversibility in the components considered in part (a). (c) determine the power, in \( \mathrm{kW} \). (d) the isentropic compressor efficiency.