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Principles of Sustainable Energy Systems, Second Edition, 2nd Edition
book

Principles of Sustainable Energy Systems, Second Edition, 2nd Edition

by Frank Kreith, Susan Krumdieck
August 2013
Intermediate to advanced content levelIntermediate to advanced
790 pages
30h 5m
English
CRC Press
Content preview from Principles of Sustainable Energy Systems, Second Edition, 2nd Edition
634 Principles of Sustainable Energy Systems
© 2008 Taylor & Francis Group, LLC
condenser operate at an effective temperature difference of T of 4 K, with an overall
heat transfer coefcient U of 6000 W/m
2
K. Use the Carnot efciency for the power plant
as an approximation.
Solution
The rate of heat transfer to the working uid in the evaporator of area A is approximately
qU
AT
in
=∆
The rate of enthalpy increase of the water is
qQcT TQcT TT TQcT
TT
in hc wh wc wh wc
=−=−−+
[]
=−

ρρ ρ() ()()
()
∆∆ 2
where
ρ is the density (1.0 kg/m
3
)
c is the specic heat (4.2 × 10
3
J/kg K)
The Carnot efciency η
c
of the energy conversion process is
η
c
hc
h
wh wc
wh
TT
T
TT T
TT
=
=
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Publisher Resources

ISBN: 9781466556966