期刊
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
卷 84, 期 -, 页码 309-322出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2014.06.001
关键词
Heat transfer correlations; Thermal contact resistance; Fin-and-tube heat exchanger; CFD simulation
Plate fin-and-tube heat exchangers operate in a cross-flow arrangement. The numerical studies of performance of these heat exchangers encounter difficulties in the proper prediction of the total gas side temperature difference, because thermal contact resistance between the fin and the tube is unknown. The local measurements of its value are difficult to carry out. This paper presents a modified method for estimating the mean value of thermal contact resistance in a plate fin-and-tube heat exchanger. The proposed computational method is based on the CFD simulations and experimental measurements and it allows an accurate prediction of the total gas-side temperature difference in a heat exchanger. Furthermore, this paper presents the modified method of determining the average heat transfer coefficient for the air flow, which is similar to the technique used for experimental data reduction. (C) 2014 Elsevier Masson SAS. All rights reserved.
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