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A house is equipped with an air conditioner that uses refrigerant-134a as the working fluid, as shown in Figure 1. The air conditioner is used to keep the house at 25°C by rejecting heat the waste heat to outdoor at 37°C. The house gains heat through the walls and the windows at a rate of 300 kJ/min while the heat generated with the computer, TV and lights amounts to 900 W. The refrigerant enters the compressor at 500 kPa as a saturated vapour with a rate of 150 L/min and leaves at 1200 kPa and 50°C. Determine: i. actual COP, il. the maximum COP, and iii. the minimum volume flow rate (in L/min) of the refrigerant at the compressor inlet for the same compressor inlet and exit conditions. QH Expansion valve Condenser Evaporator •Q₁ 1.2 MPa 50°C Win Compressor 500 KPa Saturated vapor 500 KPa

A house is equipped with an air conditioner that uses refrigerant-134a as the working fluid, as shown in Figure 1. The air conditioner is used to keep the house at 25°C by rejecting heat the waste heat to outdoor at 37°C. The house gains heat through the walls and the windows at a rate of 300 kJ/min while the heat generated with the computer, TV and lights amounts to 900 W. The refrigerant enters the compressor at 500 kPa as a saturated vapour with a rate of 150 L/min and leaves at 1200 kPa and 50°C. Determine: i. actual COP, il. the maximum COP, and iii. the minimum volume flow rate (in L/min) of the refrigerant at the compressor inlet for the same compressor inlet and exit conditions. QH Expansion valve Condenser Evaporator •Q₁ 1.2 MPa 50°C Win Compressor 500 KPa Saturated vapor 500 KPa

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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b) A house is equipped with an air conditioner that uses refrigerant-134a as the working fluid, as shown in Figure 1. The air conditioner is used to keep the house at 25°C by rejecting heat the waste heat to outdoor at 37°C. The house gains heat through the walls and the windows at a rate of 300 kJ/min while the heat generated with the computer, TV and lights amounts to 900 W. The refrigerant enters the compressor at 500 kPa as a saturated vapour with a rate of 150 L/min and leaves at 1200 kPa and 50°C. Determine: I. actual COP. ii. the maximum COP, and iii. the minimum volume flow rate (in L/min) of the refrigerant at the compressor inlet for the same compressor inlet and exit conditions. QH Expansion valve Condenser 1.2 MPa 50°C Evaporator •Q₁ Figure 1: Air-conditioner Cycle Win Compressor 500 KPa Saturated vapor 500 KPa
Transcribed Image Text:b) A house is equipped with an air conditioner that uses refrigerant-134a as the working fluid, as shown in Figure 1. The air conditioner is used to keep the house at 25°C by rejecting heat the waste heat to outdoor at 37°C. The house gains heat through the walls and the windows at a rate of 300 kJ/min while the heat generated with the computer, TV and lights amounts to 900 W. The refrigerant enters the compressor at 500 kPa as a saturated vapour with a rate of 150 L/min and leaves at 1200 kPa and 50°C. Determine: I. actual COP. ii. the maximum COP, and iii. the minimum volume flow rate (in L/min) of the refrigerant at the compressor inlet for the same compressor inlet and exit conditions. QH Expansion valve Condenser 1.2 MPa 50°C Evaporator •Q₁ Figure 1: Air-conditioner Cycle Win Compressor 500 KPa Saturated vapor 500 KPa
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