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Proceedings of CHT-08 ICHMT International Symposium on Advances in Computational Heat Transfer
May, 11-16, 2008, Marrakesh, Morocco

DOI: 10.1615/ICHMT.2008.CHT


ISBN Print: 978-1-56700-253-9

ISSN: 2578-5486

COMBINED HEAT AND MASS TRANSFER ANALYSIS FROM ANNULAR FINS OF CONSTANT CROSS-SECTIONAL AREA

page 15
DOI: 10.1615/ICHMT.2008.CHT.1100
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Краткое описание

A numerical analysis was carried out to study the efficiency and temperature distribution of annular fins of constant cross-sectional area when subjected to both heat and mass transfer mechanisms. The temperature and humidity ratio differences are the driving forces for the heat and mass transfer, respectively. In the previous work reported in the literature a linear model assumption is used for the relationship between the humidity ratio and temperature; however in the present work actual psychrometric relations are used in the solution procedure. In this regard a nonlinear mathematical model representing the heat and mass transfer mechanisms was solved using a finite difference successive over-relaxation method. Numerical solutions are obtained for the temperature distribution over the fin surface in addition to fin efficiency for both fully wet and partially wet fin surfaces. The numerical results are compared with those of previous studies in order to find if the linear model in the published analytical results are close to the real situation. It was found that one of the linear models for the relation between the humidity ratio and temperature is a reasonable engineering approximation.

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