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REVIEW ARTICLES

A Review of Solution Methods for Determining Effectiveness-NTU Relationships for Heat Exchangers With Complex Flow Arrangements

[+] Author and Article Information
D. P. Sekulić

Center for Robotics and Manufacturing Systems, College of Engineering, University of Kentucky, Lexington KY 40506-0108

R. K. Shah

Delphi Harrison Thermal Systems, Lockport NY 14094-1896

A. Pignotti

Fundacion para el Desarrollo Tecnologico, L Alem 1067, 1001 Buenos Aires, Argentina

Appl. Mech. Rev 52(3), 97-117 (Mar 01, 1999) (21 pages) doi:10.1115/1.3098928 History: Online April 14, 2009

Abstract

A number of approaches have been employed for the design and analysis of two-fluid heat exchangers. These approaches include the effectiveness (ε or P)-number of transfer units (NTU) method, the mean temperature difference method, and the ones using the Mueller and Roetzel charts. A comprehensive review is presented of solution methods for obtaining effectiveness-NTU relationships for simple and complex heat exchangers and heat exchanger assemblies. These include analytical methods for obtaining exact solutions, approximate (including semi-numerical and analog) methods, numerical methods, matrix formalism, and additional methods based on the properties of the exchanger configurations. Additional details that pertain to the Laplace transforms and matrix formalism that includes the chain rule methodology are discussed. A step-by-step procedure that illustrates the chain rule methodology is presented. This review article includes 73 references.

Copyright © 1999 by American Society of Mechanical Engineers
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