An Assessment of Refrigerant Heat Transfer, Pressure Drop, and Void Fraction Effects In Microfin Tubes
An Assessment of Refrigerant Heat Transfer, Pressure Drop, and Void Fraction Effects In Microfin Tubes
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DOI：
10.1080/10789669.2001.10391267
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发表时间：
2001-04
期刊：
影响因子：
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通讯作者：
T. Newell;R. Shah
中科院分区：
文献类型：
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作者：
T. Newell;R. Shah
微翅片管可以显著增加制冷蒸发器和冷凝器的传热。微鳍的有效性取决于流体特性、流场结构、热流方向（蒸发和冷凝）以及管的几何形状。本文综述了微鳍管在制冷系统中的性能，并详细介绍了有关微鳍管性能的已知信息以及尚未研究的信息。一般来说，微鳍增强传热的量与内壁表面增加的表面积相似或更大。压降没有明显增加的趋势；然而，报道的压降效应范围很广。油一般会降低传热，增加压降；然而，油的浓度和粘度是重要的因素。
Microfin tubing can significantly increase heat transfer in refrigeration evaporators and condensers. The effectiveness of microfins is dependent on fluid properties, flow field configuration, heat flux direction (evaporation and condensation), and tube geometry. This review focuses on the performance of microfin tubes in refrigeration systems and details information known about microfin tube performance as well as information that is not yet investigated. Generally, microfins enhance heat transfer by an amount that is similar or greater than the amount of surface area added to the internal wall surface. Pressure drop does not tend to increase significantly; however, the range of reported pressure drop effects is broad. Oil generally degrades heat transfer and increases pressure drop; however, the oil concentration and viscosity are important factors.