Contact resistance in air-cooled plate fin-tube air-conditioning condensers |
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Authors: | RE Critoph MK Holland L Turner |
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Affiliation: | Engineering Department, University of Warwick, Coventry CV4 7AL, UK |
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Abstract: | Test equipment and procedures have been developed to measure the heat transfer performance of an industry-standard wavy plate fin-tube condenser, and to compare it with alternative designs. Two test rigs were employed: one used direct electric heating, and the other used an R22 thermosyphon. Analysis revealed that the standard production heat exchanger suffered from excessive fin-tube resistance. This was confirmed by sectioning and microscopic examination. Seven different designs were compared at the same Reynolds number. The results were analysed to isolate the air-side heat transfer coefficient. |
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Keywords: | heat transfer tube fin air testing rig heat transfer coefficient |
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