The diagram shows a simplified version of how an air conditioner works. A liquid refrigerant (represented by stream 1 in the figure) passes through an expansion valve, where it flashes to a lower pressure and partially evaporates. This liquid-vapor mixture (represented by stream 2) passes through an evaporator coil that cools indoor air. Heat absorbed from the indoor air causes the refrigerant to completely vaporize. This vapor stream (represented by stream 3 ) goes to an adiabatic compressor, where it is pressurized. During the pressurization process, the temperature is simultaneously raised. This superheated vapor (represented by stream 4) passes through a condenser, where the stream is cooled to condensation by outside air. After condensation, the refrigerant is at the same conditions as it was in the start of the cycle. Consider the refrigeration cycle applied to the refrigerant chlorodifluoromethane (CHClF2, referred to in industry as R22). R-22 is circulated through the air conditioner at a rate of 89.00lbm/min. The streams are at the conditions listed. - Stream 1: liquid, 95F,197psi,H^liq=104.8Btu/lbm - Stream 2: liquid and vapor, 37F,79.5psi,H^liq=87.75Btu/lbm,H^vap=175.1Btu/lbm - Stream 3: vapor, 37F,79.5psi,H^vap=175.1Btu/lbm - Stream 4: vapor, 122F,197psi,H^vap185.0Btu/lbm If the expansion valve operates adiabatically and Ek is negligible, perform an energy balance around the valve to determine the fraction of the refrigerant that evaporates at the expansion valve. If the expansion valve operates adiabatically and Ek is negligible, perform an energy balance around the valve to fraction of refrigerant evaporated: determine the fraction of the refrigerant that evaporates at the expansion valve. What is the rate of heat transfer to evaporating refrigerant in the evaporator coil? QB=Btu/min If the refrigerant loses 7140Btu/min in heat through the condenser, calculate the horsepower the compressor must Ws= input to the refrigerant