Exergy Analysis for the Evaluation of the Performance of Closed Thermal Energy Storage Systems

[+] Author and Article Information
M. A. Rosen

Department of Mechanical Engineering, Ryerson Polytechnical Institute, Toronto, Ontario, M5B 2K3, Canada

F. C. Hooper, L. N. Barbaris

Department of Mechanical Engineering, University of Toronto, Toronto, Ontario, M5S 1A4, Canada

J. Sol. Energy Eng 110(4), 255-261 (Nov 01, 1988) (7 pages) doi:10.1115/1.3268265 History: Received January 28, 1988; Revised July 29, 1988; Online November 11, 2009


The use of exergy analysis, rather than energy analysis, for the evaluation of the performance of thermal energy storage systems is discussed. The energy and exergy relationships for a simple closed tank storage with heat transfers by heat exchanger are obtained. A complete storing cycle, as well as the individual charging, storing, and discharging periods, are considered. A numerical example for a simple case is given. The work reported is preliminary to the task of developing simplified conventions for the evaluation and comparison of the performance of thermal storages using exergy analysis methods. The establishment of such simplified conventions appears to be a necessary prerequisite to general acceptance of these methods by the engineering community.

Copyright © 1988 by ASME
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