Heat-exchanger design: Optimal length of an array of uniformly-spaced vertical rectangular fins protruding upwards from a horizontal base

C. W. Leung and S. D. Probert

Applied Energy, 1988, vol. 30, issue 1, 29-35

Abstract: The effect of varying the fins' length on the steady-state rate of heat loss from this commonly adopted orientation of this simple, popular type of rectangular-based heat exchanger has been studied. The investigation was carried out with a base width of 190 mm, a duralumin fin thickness of 3 mm and a protrusion of 60 mm. The optimal fins' length, to achieve a maximum rate of heat transfer under natural convection conditions, rose from 247 to 319 mm as the fin separation was increased from 10 to 50 mm, all other parameters remaining invariant. The base temperature was kept constant at either 20(±0·2)°C or 40(±0·2)°C in excess of the laboratory's mean air temperature, in the vicinity of the heat exchanger, of 20(±0·2)°C during the investigation.

Date: 1988
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