A refrigerator uses refrigerant-134a as the working fluid and operates on the vapor-compression refrigeration cycle. The evaporator and condenser pressures are 100 kPa and 1400 kPa, respectively. The isentropic efficiency of the compressor is 88 percent. The refrigerant enters the compressor at a rate of 0.022 kg/s superheated by 26.37°C and leaves the condenser subcooled by 4.4°C. Problem 11.021.b - Comparison to ideal vapor compression cycle 1) Determine the rate of heat removal from the refrigerated space 2) The rate of heat rejection from the refrigerant to the environment 3) The power input and the COP if the cycle is operated on the ideal vapor-compression refrigeration cycle between the same pressure limits. (Take the required values from saturated refrigerant-134a tables.)
A refrigerator uses refrigerant-134a as the working fluid and operates on the vapor-compression refrigeration cycle. The evaporator and condenser pressures are 100 kPa and 1400 kPa, respectively. The isentropic efficiency of the compressor is 88 percent. The refrigerant enters the compressor at a rate of 0.022 kg/s superheated by 26.37°C and leaves the condenser subcooled by 4.4°C.
Problem 11.021.b - Comparison to ideal vapor compression cycle
1) Determine the rate of heat removal from the refrigerated space
2) The rate of heat rejection from the refrigerant to the environment
3) The power input and the COP if the cycle is operated on the ideal vapor-compression refrigeration cycle between the same pressure limits.
(Take the required values from saturated refrigerant-134a tables.)
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