A Correlation for the Heat Conduction Effects in Counterflow Rotary Regenerative Heat Exchangers

[+] Author and Article Information
C. M. Shen, W. M. Worek

Department of Mechanical Engineering (m/c 251), University of Illinois at Chicago, 842 West Taylor Street, Chicago, IL 60607-7022

J. Energy Resour. Technol 115(4), 287-290 (Dec 01, 1993) (4 pages) doi:10.1115/1.2906434 History: Received September 18, 1992; Revised June 21, 1993; Online April 16, 2008


Equations that predict the dependence of regenerator effectiveness on heat conduction in the matrix both parallel to and perpendicular to the fluid flow are derived from numerical simulations. The equations developed use Biot numbers parallel to the direction of fluid flow (Bix ) and perpendicular to the fluid flow direction (Biy ), the ratio of heat capacity rates (C*), the heat capacity rate ratio (C*Γ ), and the overall number of transfer units (NTUo ) to characterize the regenerator performance. Comparison of numerical predictions with those obtained using the equations developed in this paper show excellent agreement. These equations enable designers to accurately account for two-dimensional conduction effects when regenerators are designed.

Copyright © 1993 by The American Society of Mechanical Engineers
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