Numerical Determination of the LMTD Correction Factor for Shell-and-Tube 1-2 Heat Exchangers

Abstract:

This paper outlines a novel numerical methodology to compute the LMTD correction factor for a shell-and-tube heat exchangers. Although the presented methodology can be extended to other shell-and-tube heat exchangers, the analysis presented is this paper concerns the one shell pass and two tube pass configuration, namely 1-2 shell-and-tube heat exchanger. The correction factor is compute by means of an association of e-NTU and LMTD approaches proposed by Kays and London (1998). An analysis of the convergence of the solution provided by the numerical methodology is confronted against results from an analytical solution available in the literature to compute the LMTD correction factor for infinite number of baffles. Numerical results shows that, as the number of baffles is increased, the numerical solution approaches the analytical solution available in the literature. The presented numerical methodology allows the direct computation of the LMTD correction factor for a determined arrangement, giving a new perspective on the project and sizing of shell-and-tube heat exchangers, since typically the analytical solution is applied for all arrangements.

• Periodical: Applied Mechanics and Materials (Volumes 789-790)
• Pages: 457-461
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.789-790.457
• Online since: September 2015
• Authors: Luiz Gustavo Monteiro Guimarães*, Matheus dos Santos Guzella, Luben Cabezas-Gómez, Flávio Neves Teixeira
• Keywords: LMTD Correction Factor, Numerical Methodology, Shell-and-tube heat exchangers

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