A commercial refrigerant that uses R-134a as the refrigerant is used for cooling, to keep the...

A commercial refrigerant that uses R-134a as the refrigerant is used for cooling, to keep the condition at -35o, throws heat into the cooling water that has been in the condenser at 18oC and 0.25kg / s and has been formed since 26o. The refrigerant enters the condenser at 1.2 MPa and 50o ° and exits by cooling 5o C more than the saturation temperature at the same pressure. If the compressor consumes 3.3 kW (Answer: 0.0498 kg / s, 5.07 kW, 1.54, 1.13 kW) a) mass flow rate of refrigerant b) cooling load (amount of usage amount of heat) c) COP d) required for the same cooling load tr detect small compressor power

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genius_generous answered 2 years ago

A commercial refrigerator with refrigerant 134a as the working fluid is used to keep the refrigerated...

A commercial refrigerator with refrigerant 134a as the working fluid is used to keep the refrigerated space at TL = -35°C by rejecting waste heat to cooling water that enters the condenser at 18°C at a rate of 0.25 kg/s and leaves at 26°C. The refrigerant enters the condenser at 1.2 MPa and 50°C and leaves at the same pressure and 41.3°C. If the compressor consumes 3.3 kW of power, determine (a) the mass flow rate of the refrigerant, (b)...

Consider a vapour compression refrigeration cycle that uses R-134a as refrigerant. The R-134a enter

Consider a vapour compression refrigeration cycle that uses R-134a as refrigerant. The R-134a enters the compressor as a saturated vapour at 200 kPa, and exits the condenser as a saturated liquid at 900 kPa. The rate of refrigeration of the cycle is to be 6.0 tons of refrigeration (1 ton of refrigeration = 3.517 kW). The compressor isentropic efficiency is 80%. Determine: a) The temperature of evaporation and condensation of the refrigerant; b) Mass flow of the refrigerant R-134a, in ...

A steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant changes from saturated...

A steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant changes from saturated vapor to saturated liquid at 40 C in the condenser as it rejects heat. The evaporator pressure is 120 kPa. Determine: (a) the amount of heat absorbed from the refrigerated space; qL = _______________ kJ/kg (b) the net work input; and wnet = ______________ kJ/kg (c) the coefficient of performance of the system. COP = _____________

a refrigerator uses refrigerant 134a as a working fluid and operates on the vapour -compression refrigiration...

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Refrigerant R-134a enters the compressor of a refrigeration machine at 140 kPa pressure and -10 °...

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A 10-ft3 tank contains a saturated mixture of refrigerant R-134a at a pressure of 40 psia....

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Saturated liquid refrigerant R-134a is throttled from 900 to 90 kPa at a rate of 0.32 kg/s. What is the rate of entropy generation for this throttling process? kW/K

For an ideal vapor-compression heat pump cycle, refrigerant 134a is used to provide 35 kW of...

For an ideal vapor-compression heat pump cycle, refrigerant 134a is used to provide 35 kW of heat to a building. Saturated vapor enters the compressor at 1.6 bar and saturated liquid exits the condenser which operates at 8 bar. What is (a) the mass flow rate of the refrigerant, and (b) the COP?

Air enters an air-conditioning system that uses refrigerant-134a at 30°C and 70 percent relative humidity at...

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An ice-making machine operates on the ideal-vapor compression cycle using refrigerant-134a. The refrigerant enters the compressor...

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