solution
A residential heat pump system operating at steady state is shown schematically in Fig. P5.66. Refrigerant 134a circulates through the components of the system, and property data at the numbered locations are given on the figure. The mass flow rate of the refrigerant is 4.6 kg/min. Kinetic and potential energy effects are negligible. Determine
(a) rate of heat transfer between the compressor and the surroundings, in kJ/min.
(b) the coefficient of performance.
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Figure P5.67 shows a simple vapor power plant operating at steady state with water circulating through the components. Relevant data at key locations are given on the figure. The mass flow rate of the water is 109 kg/s. Kinetic and potential energy effects are negligible as are all stray heat transfers. Determine
(a) the thermal efficiency.
(b) the mass flow rate of the cooling water passing through the condenser, in kg/s.
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