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Experimental studies on a corrugated plate heat exchanger for OTEC applications, experimental thermal and fluid science

Faizal, Mohammed and Ahmed, Mohammed R. (2011) Experimental studies on a corrugated plate heat exchanger for OTEC applications, experimental thermal and fluid science. Experimental Thermal and Fluid Science, 36 . pp. 242-248. ISSN 0894-1777

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Abstract

Experimental studies were performed on a corrugated plate heat exchanger for small temperature difference applications. Experiments were performed on a single corrugation pattern on 20 plates arranged parallely, with a total heat transfer area of 1.16298 m2. The spacing, ΔX, between the plates was varied (ΔX = 6 mm, 9 mm, and 12 mm) to experimentally determine the configuration that gives the optimum heat transfer. Water was used on both the hot and the cold channels with the flow being parallel and entering the heat exchanger from the bottom. The hot water flow rates were varied. The cold side flow rate and the hot and cold water inlet temperatures were kept constant. It is found that for a given ΔX, the average heat transfer between the two liquids increases with increasing hot water flow rates. The corrugations on the plates enhance turbulence at higher velocities, which improves the heat transfer. The optimum heat transfer between the two streams is obtained for the minimum spacing of ΔX = 6 mm. The pressure losses are found to increase with increasing flow rates. The overall heat transfer coefficients, U, the temperature difference between the two stream at outlet, and the thermal length are also presented for varying hot water flow rates and ΔX. The findings from this work would enhance the current knowledge in plate heat exchangers for small temperature difference applications and also help in the validation of CFD codes.

Item Type: Journal Article
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Engineering and Physics
Depositing User: Ms Shalni Sanjana
Date Deposited: 20 Jun 2011 21:48
Last Modified: 20 Jun 2012 21:48
URI: http://repository.usp.ac.fj/id/eprint/4774
UNSPECIFIED

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