Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 35°C at a rate of 0.018 kg/s and leaves at 800 kPa as a saturated liquid. The compressor consumes 1.2 kW of power. Use data from the tables. 800 kPa x-0 - Expansion valve QH Condenser Evaporator Q₁ Compressor Determine the COP of the heat pump. The COP of the heat pump is 2.55 800 kPa 35°C

Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 35°C at a rate of 0.018 kg/s and leaves at 800 kPa as a saturated liquid. The compressor consumes 1.2 kW of power. Use data from the tables. 800 kPa x-0 - Expansion valve QH Condenser Evaporator Q₁ Compressor Determine the COP of the heat pump. The COP of the heat pump is 2.55 800 kPa 35°C

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

Chapter41: Troubleshooting

Section: Chapter Questions

Problem 8RQ: When the outside ambient air temperature is 90F, the temperature of the condensing refrigerant in a...

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When the outside ambient air temperature is 90F, the temperature of the condensing refrigerant in a standard- efficiency unit should be approximately A. 120F. B. 130F. C. 140F. D. 150F.
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In a steam power plant, the condenser pressure is 10 kPa. The turbine and pump isentropic efficiencies are both 85 %. Draw the schematic and T-S diagrams. Label the points by setting point 1 at the condenser outlet, point 2 at the pump outlet, point 3 at the boiler outlet, and point 4 at the turbine outlet. Use the label 2a and 4a for the points due to the isentropic efficiency of the pump and turbine, respectively. Use 2 decimal places for the enthalpy and other energies in solving and for the final answers. For the steam quality (x) and entropy (s), use 4 decimal places in solving. For the specific volume, use 6 decimal places. The pressure and the temperature of steam that enters the turbine are 4.5 MPa and 800 oC Determine the following: (INPUT YOUR ANSWERS ON THE BLANK SPACES PROVIDED.) Enthalpy at point 1 in kJ/kg = Enthalpy at point 2 in kJ/kg = Enthalpy at point 3 in kJ/kg = Enthalpy at point 4 in kJ/kg = Actual Enthalpy at point 2a in kJ/kg = Actual Enthalpy at point…
In a CO2 refrigerating plant, the specific enthalpy of the refrigerant as it leaves in the condenser is 135 kJ/kg and as it leaves the evaporator it is 320 kJ/kg. If the mass flow of the refrigerant is 5 kg/min, calculate the refrigerating effect per hour.
An ideal vapor-compression refrigeration cycle that uses refrigerant-134a as its working fluid maintains a condenser at 800 kPa and the evaporator at 15 kPa. Given 300 kW of cooling load, determine the following: 1. Construct didactic sketches, showing the operating principles of a refrigeration system.2. When you select a refrigerant for a certain application, what qualities would you look for in the refrigerant?3. Estimate the reversible COP values, if the low and high medium temperature are as for the evaporator and condenser.
Problem 2 – Heat Pump Thermodynamic Analysis Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 50°C at a rate of 35 L/min and leaves at 750 kPa subcooled by 3°C. The refrigerant enters the compressor at 200 kPa superheated by 3°C. Neglecting changes in kinetic and potential energy and any stray heat transfer, please answer the following. a. Create a schematic of the cycle, use the same numbers used in your textbook for the inlet and exit states of each device, and include the energy exchanges between the cycle devices and the surroundings. b. Sketch the cycle processes on a T-s diagram. c. Determine the isentropic efficiency of the compressor. d. Compute the rate of heat supplied to the heated room. e. Determine the COP of the heat pump.