Heat transfer enhancement in round tube using wire coil: Influence of length and segmentation

Abstract

Experiments are performed to study heat transfer enhancement in a round tube using a wire coil as a turbulator. This paper presents the effects of length and segmentation of the wire coil. Experiments are conducted with three different wire coils (1000, 500, and 300 mm) on the effect of length. The wire coils used to measure the effect of segmentation are three different types but of the same area (500 mm × 1, 100 mm × 5, and 50 mm × 10). The wire coils are made of copper of diameter 1.5 mm. The test fluid is water. Both heat transfer and friction factor are measured and compared. From the experiments, we were able to conclude that heat transfer and friction positively correlate to length of the wire coil. Heat transfer correlations are given as Eq. (7) for length and Eq. (10) for segmentation. © 2003 Wiley Periodicals, Inc. Heat Trans Asian Res, 32(2): 99–107, 2003; Published online in Wiley InterScience (http://www.interscience.wiley.com). DOI 10.1002/htj.10072

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