Refrigerant-134a enters the condenser of a residential heat pump at 1400 kPa and 65°C at a rate of 0.062 kgis and leaves at 1400 kPa as saturated liqud. If the compressor consumes 1.6 kW of power, determine (a) the COP of the heat pump and (b) the rate of heat absorption from outside air COP 3.651V& OL 4465 kW COP 6.356 & QL 8.570 KW COP - 5432 & QL 9.653 KW COP 13468 QL 2.784 KW

Refrigerant-134a enters the condenser of a residential heat pump at 1400 kPa and 65°C at a rate of 0.062 kgis and leaves at 1400 kPa as saturated liqud. If the compressor consumes 1.6 kW of power, determine (a) the COP of the heat pump and (b) the rate of heat absorption from outside air COP 3.651V& OL 4465 kW COP 6.356 & QL 8.570 KW COP - 5432 & QL 9.653 KW COP 13468 QL 2.784 KW

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 2RQ: The operating condition for the single compressor in a household refrigerator is the lowest box...

See similar textbooks

Similar questions

The operating condition for the single compressor in a household refrigerator is the lowest box temperature, which is typically A. 0F B. -20F C. 20F D. 40F
4) Refrigerant-134a enters the condenser of a heat pump at 1000 kPa and 50°C with a rate of 0,02 kg/s. It leaves at 1000 kPa with 120 kJ/kg internal energy. On the other hand, compressor consumes 1,5 kW power a- The actual COP b- The max COP
2- 750 LPa 55 Condumsur Expusion valve Corpressor Evaparatx Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 550C at a rate of 0.018 kg/s and leaves at 750 kPa subcooled by 3°C. The refrigerant enters the compressor at 200 kPa superheated by 4°C. Determine a-the isentropic efficiency of the compressor b-the rate heat supplied to the heated room c-the COP of the heat pump
The compressor of a refrigerator using refrigerant R134a draws 1.2 kW. Since the evaporation temperature in the evaporator is -22 °C and the condensation temperature in the condenser is 38 °C; (a) Plot this refrigerator system schematically with its elements and show it on the T-s and P-h diagram of the refrigeration cycle (b) The cooling power of the refrigerator (c) The amount of heat the refrigerator gives to the environment (d) Calculate the ideal and Carnot COP cooling values of this refrigerator.
A manufacturer conducted an experiment for an evaporator capacity 548.8 kW cooling. Enthalphies of the refirgerant and solution are found to be: -144 solution leaving the Absorber -535.27 solution leaving the Generator 3256.50 refrigerant generated 167.93 refrigerant leaving the Condenser 2549.76 refrigerant absorbed determine: Mass flow of the refrigerant in kg/s Answer in four decimal places.
An ammonia compressor operates on an evaporator pressure of 291.57 kPa and a condenser pressure of 1557 kPa. A Heat Exchanger is installed thus superheating the refrigerant by 100C and a subcooling by 50 C. The system is used to cool water at 2 kg/s from 250 C to 150 C. Given: h1=1476 kJ/kg , h2=1752 kJ/kg . Determine the ff: a.) mass flow of reffrigerant. kg/s b.) compressor work. kw c.) mass flow of cooling water needed in the condenser for a temp. drop of 180F. kg/s
1) Refrigerant-134a enters the condenser at 200 kPa and 10°C and it leaves at 200 kPa with a quality of 45 percent in a heat pump. The load of heat pump is 700 W and COP of the heat pump is 3.5, determine a- The rate of heat gains from the environment ( b- The minimum compressor work c- The mass flow rate of the refrigerant
A real heat pump has .02 kg/s of refrigerant-134a flowing through and consumes 3 kW of power. The refrigerant is a mixture at 50% quality and 120 kPa entering the evaporator and leaves at 100 kPa and -20 C. The refrigerant enters the condenser at 1.4 MPa and leaves at 1.2 MPa. Assuming no loss in pressure or temperature in the connecting pipes, determine the temperature, pressure, enthalpy and entropy at all positions in the cycle, the heat transfer coming in and leaving, the COP of this heat pump, the isentropic efficiency of the compressor, and the rate of entropy generation in the compressor.
A real Heat Pump has .02 kg/s of refrigerant flowing through it and consumes 3 kW of power. The refrigerant is a mixture at 50% quality and 120 kPa entering the evaporator and leaves at 100 kPa and -20 C The refrigerant enters the condenser at 1.4 MPa and leaves at 1.2 MPa Assuming no loss in pressure or temperature in the connecting pipes determine the Temperature, Pressure, Enthalpy and Entropy at all positions in the cycle, the heat transfer coming in and leaving, the COP of this Heat Pump, the Isentropic Efficiency of the compressor and the rate of entropy generation in the compressor and of the throttling process
1) refrigerated space at -35°C by rejecting waste heat to cooling water that enters the condenser at T, C at a rate of 0.25 kg/s and leaves at 26°C. The refrigerant enters the condenser a leaves at the same pressure subcooled by T, C. If the compressor consumes 3.3 kW of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, Q. (c) the COP. Is this cycle reversible or irreversible? Explain. A commercial refrigerator with refrigerant-134a as the working fluid is used to keep the 1.2 MPa and 50°C and Notes: If the last digit of your student number is less than 5,1 T, is equal to the last digit of your student number. T. 16°C. It is 20°C otherwise. in any ofogse questions, yoe
A real heat pump has .02 kg/s of refrigerant-134a flowing through and consumes 3 kW of power. The refrigerant is a mixture at 50% quality and 120 kPa entering the evaporator and leaves at 100 kPa and -20 C. The refrigerant enters the condenser at 1.4 MPa and leaves at 1.2 MPa. Assuming no loss in pressure or temperature in the connecting pipes, determine the temperature, pressure, enthalpy and entropy at all positions in the cycle, the heat transfer coming in and leaving, the COP of this heat pump, the isentropic efficiency of the compressor, and the rate of entropy generation in the compressor and of the throttling process.
A vacuum refrigeration system consists of a large insulated flash chamber kept at low pressure by steam ejector which pumps vapor to a condenser. Condensate is removed by condensate to an air vent. Warm return water enters the flash chamber at 13oC, chilled water comes out of the flash chamber at 5oC Vapor leaving the flash chamber has a quality of 0.97 and the temperature in the condenser is 32oC. For 350 kw of refrigeration How much vapor must the steam ejector remove from the flash chamber?