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首页> 外文期刊>Journal of Heat Transfer >Boiling of R134a in a Plate-Fin Heat Exchanger Having Offset Fins
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Boiling of R134a in a Plate-Fin Heat Exchanger Having Offset Fins

机译：R134a在翅片偏置翅片式换热器中的沸腾

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摘要

This paper presents experimental results on boiling heat transfer of R134a in a compact plate fin heat exchanger. The exchanger is made of aluminum and has high density offset fins (30 fins/in.). Such heat exchangers are widely used in air separation industry and aerospace applications because of their high compactness and low weight. The test heat exchanger is attached to a vapor cycle refrigeration basic module to study the effects of boiling phenomena and its influence on performance as there is limited information available for this type of fins. This in turn allows for discussion on boiling mechanism of R134a inside the fins using the water circuit on the other side of the test heat exchanger. The water side single phase heat transfer coefficient (Colburn j factor) is calculated using the cfd tool fluent and validated with available open literature. The results are presented for heat fluxes up to 5500 W/m~2 and mass fluxes up to 20 kg/(m~2 s) with water side flow rate varying from 0.033 to 0.17 kgls for water temperatures of 10, 15, 20, 25, and 30℃.
机译：本文介绍了紧凑型板翅式换热器中R134a沸腾传热的实验结果。交换器由铝制成，并具有高密度偏置鳍片（30鳍片/英寸）。这种热交换器由于其高紧凑性和低重量而被广泛用于空气分离工业和航空航天应用中。测试热交换器连接到蒸汽循环制冷基本模块上，以研究沸腾现象的影响及其对性能的影响，因为此类翅片的可用信息有限。这进而允许使用测试热交换器另一侧的水回路来讨论散热片内部R134a的沸腾机理。水面单相传热系数（Colburn j因子）是使用cfd工具流利计算得出的，并已通过公开的文献进行了验证。给出了在水温为10、15、20， 25和30℃。

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