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首页> 外文期刊>Journal of Thermal Science and Engineering Applications: Transactions of the ASME >Heat Transfer Enhancement of Double-Tube-Type Heat Exchanger by Petal-Shaped Tube (Study on Optimum Tube Shape)
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Heat Transfer Enhancement of Double-Tube-Type Heat Exchanger by Petal-Shaped Tube (Study on Optimum Tube Shape)

机译：花瓣状管热传递增强双管式热交换器（最佳管形研究）

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摘要

Heat exchangers are used widely in many fields, and various kinds of exchanger have been developed according to the requirement of the practical applications. Recently, heat exchangers that are highly efficient or compact have become more desirable from the viewpoint of energy conservation, and several new types have been developed, such as a compact fin tube type and a double tube type having an inner pipe with a special geometry. In this study, the flow and heat transfer characteristics of a petal-shaped double tube with a large wetted perimeter of six and five petals and five shallow petals and the effect of tube shape on the heat transfer and heat transfer efficiency were examined experimentally. The heat transfer of the double tube with a petal-shaped inner tube was increased because of the large wetted perimeter, but the pressure loss by friction increased. The optimal shape of the petal-shaped double tube with a high heat transfer performance and the greatest efficiency is discussed.
机译：热交换器在许多领域中广泛使用，并且根据实际应用的要求开发了各种交换器。最近，从节能的观点出发，高效或紧凑的热交换器已经更加理想，并且已经开发了几种新型，例如紧凑的翅片管型和具有特殊几何形状的内管的双管型。在本研究中，实验研究了具有六个和五个花瓣的大湿润周长的花瓣形双管的流量和传热特性，以及管形状对传热和传热效率的效果。由于大的湿润周长，具有花瓣形内管的双管的传热增加，但通过摩擦的压力损失增加。讨论了具有高传热性能和最大效率的花瓣状双管的最佳形状。

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