e vapor-compression refrigeration cycle uses R-134a as poler operates in 80°F surroundings, and the water coc M stream of liquid water from 60°F to 35°F. The comp ondenser pressures that will allow the refrigeration cy
e vapor-compression refrigeration cycle uses R-134a as poler operates in 80°F surroundings, and the water coc M stream of liquid water from 60°F to 35°F. The comp ondenser pressures that will allow the refrigeration cy
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
Chapter44: Geothermal Heat Pumps
Section: Chapter Questions
Problem 10RQ: A(n) ______well draws water from the top of thewater column, circulates it through the heat pump,...
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![A water cooler based on the vapor-compression refrigeration cycle uses R-134a as the
working fluid. The water cooler operates in 80°F surroundings, and the water cooler
will used to cool a 0.50 GPM stream of liquid water from 60°F to 35°F. The compressor
efficiency is 75%.
a) Select evaporator and condenser pressures that will allow the refrigeration cycle to
operate in this environment, and find the coefficient of performance of the
refrigeration cycle.
b) Find the power input to the compressor, in horsepower.
Use Cengel's R-134a tables posted on Canvas to model the refrigerant.
Expansion
Valve
TOUT
= 35°F
3
4
80°F
Surroundings
QCONDENSER
2
Condenser
Evaporator
EVAPORATOR
0.50 GPM of Water
Compressor
TIN = 60°F
W COMPRESSOR](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe374e874-5461-490c-9f50-64cb80000b51%2F28323137-37ac-413f-9022-cde1d59152e6%2Fv3xvt0v_processed.png&w=3840&q=75)
Transcribed Image Text:A water cooler based on the vapor-compression refrigeration cycle uses R-134a as the
working fluid. The water cooler operates in 80°F surroundings, and the water cooler
will used to cool a 0.50 GPM stream of liquid water from 60°F to 35°F. The compressor
efficiency is 75%.
a) Select evaporator and condenser pressures that will allow the refrigeration cycle to
operate in this environment, and find the coefficient of performance of the
refrigeration cycle.
b) Find the power input to the compressor, in horsepower.
Use Cengel's R-134a tables posted on Canvas to model the refrigerant.
Expansion
Valve
TOUT
= 35°F
3
4
80°F
Surroundings
QCONDENSER
2
Condenser
Evaporator
EVAPORATOR
0.50 GPM of Water
Compressor
TIN = 60°F
W COMPRESSOR
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