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首页> 外文期刊>Journal of Thermal Science and Engineering Applications: Transactions of the ASME >Experimental Characterization of Heat Transfer and Pressure Drop Inside a Tubular Evaporator Utilizing Advanced Microgmoved Surfaces
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Experimental Characterization of Heat Transfer and Pressure Drop Inside a Tubular Evaporator Utilizing Advanced Microgmoved Surfaces

机译：利用先进的微运动表面对管状蒸发器内的传热和压降进行实验表征

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摘要

Performance enhancement of heat exchangers with a focus in optimum weight/volume and the amount of working fluid in circulation is of significance to a diverse range of industries. This paper presents heat transfer and pressure drop characteristics of a compact tubular evaporator which utilizes a manifold force-fed microchannel design. A microgrooved structure with an aspect ratio of 3:1 (channel width of 100 μm and channel height of 300 μm) forms the channels used on the refrigerant side and minichannels of 1 mm depth were used on the water side. The system was tested using R134a as the refrigerant with a refrigerant flow rate of 6 to 22 g/s and water flow rate of 150 to 640 ml/s. Overall heat transfer coefficients of more than 10,000 W/m~2 K were obtained with modest values of pressure drop. The present results indicate a significant enhancement in thermal performance when compared to the state-of-the-art technologies in the same application area.
机译：专注于最佳重量/体积和循环中工作流体的量，提高热交换器的性能对各种行业都具有重要意义。本文介绍了紧凑的管状蒸发器的传热和压降特性，该蒸发器采用歧管强制供气微通道设计。具有3：1的长宽比的微槽结构（通道宽度为100μm，通道高度为300μm）形成了在制冷剂侧使用的通道，在水侧使用了1 mm深度的微型通道。使用R134a作为制冷剂对系统进行了测试，制冷剂流速为6到22 g / s，水流速为150到640 ml / s。在压降适中的情况下获得的总传热系数超过10,000 W / m〜2K。与同一应用领域中的最新技术相比，本结果表明热性能有了显着提高。

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