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Engineering · Mechanical Engineering
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A two-evaporator compression refrigeration system as shown in the figure uses R- as the working fluid. The regrigerant in evaporator 1 is at 4°C, and in evaporator 2 at 27.0°C. The condenser pressure is 800 kPa. The mass flow rate of the refrigerant through the compressor is 0.11 s and the low-temperature evaporator serve a clooing load of 9 kW. The refrigerant is saturated liquid at the condenser exit and saturated vapor at the exit of each evaporator, and the compressor is isentropic. Determine the following values. (1) The mass flow rate through the low-temperature evaporator. (2) The specific enthalpy of the refrigerant at the comrpessor inlet. (3) The cooling rate of the high-temperature evaporator. (4) The compressor power input. 5) The COP of the system

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