Introduction of exergy concepts using intuitive methods

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:483936

Petrescu, S; Petrescu, V ^[1]; Harman, C M ^[2]

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1. Bucknell Univ., Lewisburg, PA (United States). Dept. of Mechanical Engineering
2. Duke Univ., Durham, NC (United States). Dept. of Mechanical Engineering and Materials Science

Exergy or availability concepts in steady flow are presented in an intuitive manner through use of physical models and accompanying property diagrams. The concept of exergy is explained through the use of reversible steady flow shaft work. The Gouy-Stodola theorem is proven and the processes illustrated using property diagrams. Finally, a comparison is made of the Carnot cycle operated as an engine, as a refrigerator and as a heat pump and exergetic efficiencies are shown for each. The exergetic and energetic Sankey balance diagrams for each of the three cycles are combined and compared to show the similarities and differences in the use of the exergetic method.

• OSTI ID: 483936
• Report Number(s): CONF-961105--; ISBN 0-7918-1527-7
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
42 ENGINEERING
CARNOT CYCLE
EXERGY
HEAT ENGINES
HEAT PUMPS
REFRIGERATORS
STEADY-STATE CONDITIONS