The refrigerator shown in Fig. P5.35 operates at steady state with a coefficient of performance of 4.5 and a power in- put of 0.8 kW. Energy is rejected from the refrigerator to the surroundings at 20°C by heat transfer from metal coils whose average surface temperature is 28°C. Determine (a) the rate energy is rejected, in kW. (b) the lowest theoretical temperature inside the refrigerator, in К. (c) the maximum theoretical power, in kW, that could be de- veloped by a power cycle operating between the coils and the surroundings. Would you recommend making use of this opportunity for developing power? Refrigerator B = 4.5 Surroundings, 20°C Coils, 28°C M 0.8 kW

The refrigerator shown in Fig. P5.35 operates at steady state with a coefficient of performance of 4.5 and a power in- put of 0.8 kW. Energy is rejected from the refrigerator to the surroundings at 20°C by heat transfer from metal coils whose average surface temperature is 28°C. Determine (a) the rate energy is rejected, in kW. (b) the lowest theoretical temperature inside the refrigerator, in К. (c) the maximum theoretical power, in kW, that could be de- veloped by a power cycle operating between the coils and the surroundings. Would you recommend making use of this opportunity for developing power? Refrigerator B = 4.5 Surroundings, 20°C Coils, 28°C M 0.8 kW

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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Question

* \Q1
The refrigerator shown in Fig. P5.35 operates at steady
state with a coefficient of performance of 4.5 and a power in-
put of 0.8 kW. Energy is rejected from the refrigerator to the
surroundings at 20°C by heat transfer from metal coils whose
average surface temperature is 28°C. Determine
(a) the rate energy is rejected, in kW.
(b) the lowest theoretical temperature inside the refrigerator, in
К.
(c) the maximum theoretical power, in kW, that could be de-
veloped by a power cycle operating between the coils and
the surroundings. Would you recommend making use of
this opportunity for developing power?
Refrigerator
B = 4.5
Surroundings, 20°C
Coils, 28°C
S.
0.8 kW
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