Energy-efficient flat-tube heat exchangers for indirectly cooled display cabinets |
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| Authors: | Caroline Haglund Stignor, Bengt Sund n,Per Fahl n |
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| Affiliation: | aSP Technical Research Institute of Sweden, Energy Technology, P.O. Box 857, SE-501 15 Borås, Sweden;bLund University, Faculty of Engineering, Division of Heat Transfer, P.O. Box 118, SE-221 00 Lund, Sweden;cChalmers University of Technology, Building Services Engineering, SE-412 96 Gothenburg, Sweden |
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| Abstract: | Different designs of flat-tube heat exchangers with plain fins have been evaluated theoretically in a parameter study in order to evaluate their performance potential in indirectly cooled display cabinets. Two different types of flat-tube heat exchangers were considered; one with serpentine fins and one with continuous plate fins. Both flat-tube heat exchanger types were adapted to the laminar flow regime on the liquid as well as on the air side. The performance of the two heat exchanger types had previously been verified experimentally under dehumidifying conditions. The results from this parameter study show that considerable savings in the required electric drive power to compressors, pumps and fans can be obtained in comparison with the traditional cooling coil. The savings may be up to 15%. In addition, the required temperature difference for the flat-tube heat exchangers is so small that frost-free operation is possible, which would result in even larger savings. |
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| Keywords: | Heat exchanger Display cabinet Tube Finned tube Geometry Calculation Energy efficiencyMots-clé s: É changeur de chaleur Meuble de vente Tube Tube aileté Gé omé trie Calcul Efficacité é nergé tique |
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