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Unformatted text preview: o C. Saturated vapor enters the condenser at 36 o C, and saturated liquid exists at the same temperature. The mass flow rate of refrigerant is 10kg/min. Determine a) The rate of heat transfer to the refrigerant passing through the evaporator, in kW. b) The net power input to the cycle, in kW c) The coefficient of performance. d) The refrigeration capacity, in tons. Problem 4 (10.18) A vapor-compression refrigeration system, using ammonia as the working fluid, has evaporator and condenser pressures of 200 and 30 lbf/in 2 , respectively. The refrigerant passes through each heat exchanger with a negligible pressure drop. At the inlet and exit of the compressor, the temperatures are 10 o F and 300 o F, respectively. The heat transfer rate from the working fluid passing through the condenser is 50,000 Btu/h, and liquid exits at 200 lbf/in 2 , 90 o F. If the compressor operates adiabatically, determine a) The compressor power input, in hp. b) The coefficient of performance....
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- Spring '09
- Thermodynamics, constant volume, Thermal efficiency, Constant volume heat, air-standard diesel cycle, Carnot vapor refrigeration