每年出版 8 期
ISSN 打印: 1065-5131
ISSN 在线: 1563-5074
Indexed in
ENHANCED EVAPORATIVE FLUID COOLERS
摘要
A novel design algorithm is developed for application of enhanced heat transfer technology in evaporative fluid coolers (EFCs). In spite of substantial increase in heat transfer rate, application of these devices can lead to a non-negligible pressure drop, so it is necessary to consider pressure drops in design algorithm directly. In this paper, first the plain tube bundle for EFCs is examined by a new design algorithm and then the thermal appraisal of enhanced bundles is mainly targeted. In this study, application of a typical tube insert in EFCs was investigated. It is determined that by considering the maximum allowable pressure drops, maximum heat and mass transfer coefficients and the minimum required area can be obtained in a straightforward manner. The algorithm is easily adaptable when the other various types of heat transfer enhancement devices are applied inside or even outside of the tube bundle of EFCs. The results are revealed that, depending on the enhancement device, while the heat transfer area required for a given duty is reduced the heat transfer and mass transfer coefficients can be increased significantly.
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