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Engineering and Tech / Fundamentals of Engineering Thermodynamics 7 / Chapter 2 / Problem 73P

Fundamentals of Engineering Thermodynamics | 7th Edition | ISBN: 9780470495902 | Authors: Michael J. Moran, Howard N. Shapiro, Daisie D. Boettner, Margaret B. Bailey

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Analyzing Thermodynamic CyclesFigure P2.73 shows a power

Chapter 2, Problem 73P

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QUESTION:

Figure P2.73 shows a power cycle executed by a gas in a piston-cylinder assembly. For process 1-2, \(U_2-U_1=15 \mathrm{~kJ}\). For process 3-1, \(Q_{31}=10 \mathrm{~kJ}\). There are no changes in kinetic or potential energy. Determine (a) the work for each process, in kJ, (b) the heat transfer for processes 1-2 and 2-3, each in kJ, and (c) the thermal efficiency.

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QUESTION:

Figure P2.73 shows a power cycle executed by a gas in a piston-cylinder assembly. For process 1-2, \(U_2-U_1=15 \mathrm{~kJ}\). For process 3-1, \(Q_{31}=10 \mathrm{~kJ}\). There are no changes in kinetic or potential energy. Determine (a) the work for each process, in kJ, (b) the heat transfer for processes 1-2 and 2-3, each in kJ, and (c) the thermal efficiency.

ANSWER:

Solution

Step 1 of 5

We need to find out the work for each process, the heat transfer for the processes and and the thermal efficiency.

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