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Work Wis done onthe heat pump.Hot reservoirat ThEnergy Qis expelledto the hotreservoirWHeatpumpEnergy IQdis drawnfrom theCold reservoircoldat Treservoir.

Question

If a 35.2%-efficient Carnot heat engine (left figure) is run in reverse so as to form a refrigerator (right figure), what would be this refrigerator's coefficient of performance?

Work Wis done on
the heat pump.
Hot reservoir
at Th
Energy Q
is expelled
to the hot
reservoir
W
Heat
pump
Energy IQd
is drawn
from the
Cold reservoir
cold
at T
reservoir.
help_outline

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Work Wis done on the heat pump. Hot reservoir at Th Energy Q is expelled to the hot reservoir W Heat pump Energy IQd is drawn from the Cold reservoir cold at T reservoir.

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check_circleAnswer
Step 1
Given, efficionay of Canot engine
TH
TL
TH
"careat
Carnot
pWP
HE
TL
35-2
11
TH
(00
TL
--
TH TL
35-2
Εqμαtio Ο
(o0
TH
help_outline

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Given, efficionay of Canot engine TH TL TH "careat Carnot pWP HE TL 35-2 11 TH (00 TL -- TH TL 35-2 Εqμαtio Ο (o0 TH

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Step 2
(Coefficient of pefovmance) for
Catnot Jefrige rator
CoP
is given by
TH
Ti
Ccod
TH-TL
WD
RE
4rom Equation D
PA
TH
Eeμαtio
TL
35 A
TiH TL
help_outline

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(Coefficient of pefovmance) for Catnot Jefrige rator CoP is given by TH Ti Ccod TH-TL WD RE 4rom Equation D PA TH Eeμαtio TL 35 A TiH TL

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Step 3
00
TH
35 2
THT
-TL
TH TH T
84
35.2
Tit- TL
TL
(84
THTL
TL
4or a Refrigerator cop
TH-TL
( I
help_outline

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00 TH 35 2 THT -TL TH TH T 84 35.2 Tit- TL TL (84 THTL TL 4or a Refrigerator cop TH-TL ( I

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