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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Flow boiling heat transfer with HFC mixtures in a smooth horizontal tube. Part II: Assessment of predictive methods
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Flow boiling heat transfer with HFC mixtures in a smooth horizontal tube. Part II: Assessment of predictive methods

机译：在光滑的水平管中与HFC混合物进行流沸腾传热。第二部分：预测方法的评估

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摘要

In tube heat transfer characteristics of R410A and R404A have been experimentally investigated in a smooth horizontal tube made of stainless steel with an inner diameter of 6 mm and a length of 6 m, uniformly heated by the Joule effect. The evaporation pressures has been varied within the range from 3 to 12 bar, the refrigerant mass flux within the range from 290 to 1100 kg/m(2)s and the heat flux within the range from 11 to 39 kW/m(2). In this paper attention is focused on the comparison between experimental results and theoretical results predicted with the most known correlations from literature. The best agreement was found with the results of the correlation of Kandlikar [J. Heat-Transfer, 112 (1990) 219]. A modification of the Kandlikar correlation has been proposed in the present paper to predict the local heat transfer coefficients obtained with the test facility. A correction factor that enhance the influence of the nucleate boiling term has been introduced to take into account the influence of the reduced pressure on the heat transfer coefficients. (C) 2004 Elsevier Inc. All rights reserved.
机译：在管内，已通过内径为6 mm，长度为6 m的不锈钢制成的光滑水平管通过焦耳效应均匀加热，对R410A和R404A的传热特性进行了实验研究。蒸发压力在3至12 bar的范围内变化，制冷剂质量通量在290至1100 kg / m（2）s的范围内，热通量在11至39 kW / m（2）的范围内。在本文中，注意力集中在实验结果和理论结果之间的比较上，这些结果是根据文献中最已知的相关性预测的。与坎德利卡的相关性结果发现了最好的一致性[J.热传递，112（1990）219]。本文对Kandlikar相关性进行了修改，以预测通过测试设备获得的局部传热系数。考虑到减压对传热系数的影响，已经引入了一种增强核沸腾项影响的校正因子。 （C）2004 Elsevier Inc.保留所有权利。

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