THERMAL PERFORMANCE OF ONE-PASS SHELL-AND-TUBE HEAT EXCHANGERS IN COUNTER-FLOW

Author(s)

Magazoni, Felipe C. ^[1] ; Cabezas-Gomez, Luben ^[1] ; Alvarino, Pablo F. ^[2] ; Saiz-Jabardo, Jose M. ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Engn Mecan, Escola Engn Sao Carlos, Sao Carlos, SP - Brazil

^[2] Univ A Coruna, Escola Politecn Super, Coruna - Spain

• Document type: Journal article
• Source: Brazilian Journal of Chemical Engineering; v. 36, n. 2, p. 869-883, APR-JUN 2019.
• Web of Science Citations: 0

Abstract

A computational methodology is proposed and applied to calculate the temperature effectiveness, P, and the logarithmic mean temperature difference (LMTD) correction factor, F, of TEMA E shell-and-tube heat exchangers with one-pass and fluids flowing in counter-flow. An arbitrary number of baffles is considered along with three different mixture conditions of the shell-side fluid. The methodology is based on various modeling considerations adopted in several publications addressing crossflow and shell-and-tube heat exchangers. Each section between two baffles is idealized as a crossflow heat exchanger with different shell-side mixing conditions. The obtained results are compared to available solutions from the literature, showing a very good agreement. New closed-form mathematical P relations and approximate F correlations depending on the number of baffles, very appropriate for preliminary computerized analysis and design procedures, are provided. A theoretical study about the influence of the number of baffles and two shell-side fluid mixing hypotheses over P and F values is presented. The proposed methodology could be used to obtain P and F values for a particular arrangement of 1-1 shell-and-tube heat exchanger. (AU)

• FAPESP's process: 16/09509-1 - Phase change heat transfer processes of high performance applied to solar energy recovery
• Grantee: Gherhardt Ribatski
• Support type: Research Projects - Thematic Grants