Concept explainers
(a)
The rate of heat removal from the refrigerated space.
(a)

Answer to Problem 106P
The rate of heat removal from the refrigerated space is
Explanation of Solution
Write the highest thermal efficiency a heat engine between two specified temperature limits.
Here, the temperature inside the refrigerator is
Write the maximum power output of this heat engine.
Here, the rate of heat gain per unit degree is
Write the coefficient of performance of the Carnot refrigerator depends on the temperature limits in the cycle.
Write the rate of heat removal from the refrigerator space.
Conclusion:
Convert the temperature
Convert the temperature
Substitute
Substitute
Substitute
Substitute 8 for
Thus, the rate of heat removal from the refrigerated space is
(b)
The total rate of heat rejection to the ambient air.
(b)

Answer to Problem 106P
The total rate of heat rejection to the ambient air is
Explanation of Solution
Write the total heat rejected by refrigerator.
Write the total heat rejected by heat pump.
Write the total heat rejected to ambient.
Conclusion:
Substitute
Substitute
Substitute
Thus, the total rate of heat rejection to the ambient air is
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Chapter 6 Solutions
EBK THERMODYNAMICS: AN ENGINEERING APPR
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