Unformatted text preview: urce at 400°C. Determine (a) the entropy change of the
working fluid, (b) the entropy change of the source, and (c) the
total entropy change for the process.
7–27 Reconsider Prob. 7–26. Using EES (or other)
software, study the effects of the varying heat
added to the working fluid and the source temperature on the
entropy change of the working fluid, the entropy change of the
source, and the total entropy change for the process. Let the
source temperature vary from 100 C to 1000 C. Plot the entropy changes of the source and of the working fluid against
the source temperature for heat transfer amounts of 500 kJ,
900 kJ, and 1300 kJ, and discuss the results.
7–28E During the isothermal heat rejection process of a
Carnot cycle, the working fluid experiences an entropy change
of 0.7 Btu/R. If the temperature of the heat sink is 95°F, SINK
95°F 7–31 The radiator of a steam heating system has a volume of
20 L and is filled with superheated water vapor at 200 kPa and
200°C. At this moment both...
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This document was uploaded on 11/28/2012.
- Spring '09