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Performance Evaluation of Finned Tube Heat Exchanger with Vortex Generators in a Low Reynolds Number Regime  

Kwak Kyung-Min (School of Mechanical and Automotive engineering, Kyungil University)
Song Gil-Dal (Department of Mechanical Engineering, Yokohama National University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.18, no.2, 2006 , pp. 151-157 More about this Journal
Abstract
The present paper reports the method for evaluation of heat-transfer performance of finned tube heat exchangers in a low Reynolds number regime (Re = $160\~800$) and also reports the data of heat transfer and pressure loss taken from a finned tube heat exchanger with/without vortex generators (VGs) installed as a heat-transfer enhancement device. The evaluation is based on the modified single blow method conducted in a specially designed low Reynolds number duct. Three different test core geometries, i.e., fin only, fin-tube without VGs and that with VGs, are studied here. The data of heat transfer and pressure loss taken from the fin only geometry agree well with the empirical correlations, thus validating the present method as used for low Reynolds number regime. The data taken from the finned tube geometries with and without VGs are presented and compared to examine the effect of VGs in the low Reynolds number regime.
Keywords
Low Reynolds number; Heat transfer enhancement; Pressure loss; Finned tube heat exchanger;
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