A Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant evaporates at 120 kPa and condenses at 30ᵒC. The refrigerant changes from saturated vapor to saturated liquid in the condenser as it rejects heat. Determine the heat removal (kJ/kg) from the refrigerated space.

Why is truck refrigeration designed to provide low- and medium-temperature refrigeration?

A heat pump operates on the ideal vapor-compression refrigeration cycle and uses refrigerant-134a as the working fluid. The condenser operates at 1400 kPa and the evaporator at 140 kPa. Determine this system's COP and the rate of heat supplied to the evaporator when the compressor consumes 7 kW. (Take the required values from saturated refrigerant-134a tables.) The COP of the system is and the rate of heat supplied to the evaporator is KM 4

An ideal vapor-compression refrigeration cycle using refrigerant-134a as the working fluid is used to cool a brine solution to -5°C. This solution is pumped to various buildings for the purpose of air-conditioning. The refrigerant evaporates at -18°C with a total mass flow rate of 5 kg/s and condenses at 600 kPa. Determine the COP of the cycle and the total cooling load. (Take the required values from saturated refrigerant-134a tables.) The COP of the cycle is , and the total cooling load is kW.

A Carnot vapor refrigeration cycle uses R-134a as the working fluid. The 2 poin refrigerant enters the condenser as saturated vapor at 28°C and leaves as saturated liquid. The evaporator operates at a temperature of -10°C. For every kg of refrigerant flow, calculate the coefficient of performance of the cycle.

An ideal vapor-compression refrigeration cycle using refrigerant-134a as the working fluid is used to cool a brine solution to -5°C. This solution is pumped to various buildings for the purpose of air-conditioning. The refrigerant evaporates at -12.00°C with a total mass flow rate of 8.000 kg/s and condenses at 600 kPa. Determine the COP of the cycle and the total cooling load. (Take the required values from saturated refrigerant-134a tables.) The COP of the cycle is (Round the final answer to three decimal places.) and the total cooling load is kW.

An air conditioner using refrigerant-134a as the working fluid and operating on the ideal vapor-compression refrigeration cycle is to maintain a space at 26°C while operating its condenser at 1400 kPa. Determine the COP of the system when a temperature difference of 2°C is allowed for the transfer of heat in the evaporator. (Take the required values from saturated refrigerant-134a tables.) The COP of the system is

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An air conditioner using refrigerant-134a as the working fluid and operating on the ideal vapor-compression refrigeration cycle is to maintain a space at 36.00°C while operating its condenser at 1600 kPa. Determine the COP of the system when a temperature difference of 4.000°C is allowed for the transfer of heat in the evaporator. (Take the required values from saturated refrigerant-134a tables.) (Round the final answer to three decimal places.) The COP of the system is

A vapor compression refrigeration cycle uses refrigerant-134a as its working fluid. The condenser pressure is 800 kPa and the evaporator temperature is -20 C. The compressor has an isentropic efficiency of 80 percent. The mass flow rate is 1.7489 kg/s. In the question that follows, select the answer that is closest to the true value. What is the heat going to the evaporator in units of kW?