A heat pump is installed in a building to heat the space to a constant 22 °C when the outdoor temperature is 15 °C. The heating requirement at these conditions is 30 kW. The system uses R-410a as a refrigerant and operates according to an ideal vapor compression cycle as shown in the figures below. The saturation temperature of the refrigerant in the indoor coil is typically 20 °C higher than the desired space temperature, and the saturation temperature of the refrigerant in the outdoor unit is typically 20 °C lower than the outdoor temperature. (one of those coils is the condenser, the other is the evaporator...you should be able to identify which one is positioned outside and which one is inside for this application)
A heat pump is installed in a building to heat the space to a constant 22 °C when the outdoor temperature is 15 °C. The heating requirement at these conditions is 30 kW. The system uses R-410a as a refrigerant and operates according to an ideal vapor compression cycle as shown in the figures below. The saturation temperature of the refrigerant in the indoor coil is typically 20 °C higher than the desired space temperature, and the saturation temperature of the refrigerant in the outdoor unit is typically 20 °C lower than the outdoor temperature. (one of those coils is the condenser, the other is the evaporator...you should be able to identify which one is positioned outside and which one is inside for this application)
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...
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1. Determine the mass flow rate of refrigerant through the heat pump.
2. Determine the power required by the compressor.
3. Determine the COP of the heat pump.
4. Determine the rate of exergy destruction in each component of the heat pump.
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Step 1: Calculate the mass flow rate of refrigerant, compressor power and COP of heat pump
VIEWStep 2: Calculation of the mass flow rate of refrigerant through the heat pump
VIEWStep 3: Calculation of the power required by the compressor
VIEWStep 4: Calculation of the COP of the heat pump
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