Chapter-5 2 nd Law
Chapter-5 2 nd Law
Chapter-5 2 nd Law
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Heat Pumps:<br />
‣ another device that transfer heat from TL to TH.<br />
‣ objective is different : maintain a heated space at high<br />
temperature.<br />
COPHP =<br />
Desired output<br />
Required input<br />
<br />
Q<br />
W<br />
H<br />
net,<br />
in<br />
The objective of a heat pump<br />
is to supply heat Q H into the<br />
warmer space.<br />
COP<br />
HP<br />
<br />
Q<br />
H<br />
QH<br />
Q<br />
L<br />
<br />
1<br />
1<br />
QL<br />
Q<br />
H
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