The Optimum Design of Stratified Thermal Energy Storage Systems—Part I: Development of the Basic Analytical Model

[+] Author and Article Information
R. J. Krane

Department of Mechanical and Aerospace Engineering, The University of Tennessee, Knoxville, TN 37996-2210

M. J. M. Krane

Physical Technology Group, Semiconductor and Interconnect Technology, Digital Equipment Corporation, Andover, MA 01810

J. Energy Resour. Technol 114(3), 197-203 (Sep 01, 1992) (7 pages) doi:10.1115/1.2905941 History: Received February 15, 1991; Revised December 12, 1991; Online April 16, 2008


This investigation employs the techniques of second law analysis to show that significant improvements in performance are possible through the use of “perfectly stratified” thermal energy storage systems. Although the possibility of such improvements has been widely acknowledged in the literature, previous studies have not quantified the maximum possible performance gains attainable through the use of thermally stratified systems, nor have they established the viability of these optimal systems in actual practice. Thus, the present study was performed to achieve these two goals. This work is presented in two parts. In Part I, the specific class of systems to be examined is defined and the development of the basic analytical model is carried out. The completion of the analytical model and the presentation and interpretation of the results of an optimization study are given in Part II.

Copyright © 1992 by The American Society of Mechanical Engineers
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