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首页> 外文期刊>International Journal of Heat and Mass Transfer >Flow regime based heat transfer correlation for R245fa in a 3 mm tube
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Flow regime based heat transfer correlation for R245fa in a 3 mm tube

机译：3毫米管中R245fa基于流态的传热相关性

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摘要

241 heat transfer measurements for R254fa were conducted. The heat transfer coefficient was determined for a smooth stainless steel tube with an inner tube diameter of 3 mm. The experiments were conducted for five mass fluxes (100, 300, 500, 700 and 1000kg/(m~2s)), three heat fluxes (10, 30 and 50 kW/m2) and at three saturation temperatures (40 ℃, 70 ℃ and 125 ℃). The experiments were used to determine the influence of the saturation temperature, mass flux, heat flux, vapour quality and flow regime on the heat transfer coefficient. At a low saturation temperature, the heat transfer coefficient increases with an increasing mass flux. However, at a high saturation temperature the heat transfer coefficient decreases with an increasing mass flux. Furthermore, the heat transfer coefficient increases with increasing vapour quality at a low saturation temperature. On the contrary, the heat transfer coefficient decreases at higher saturation temperatures. Due to the fact that most heat transfer models found in literature are developed for low saturation temperatures and one flow regime, the heat transfer coefficients predicted by the existing models do not comply very well with the experimental data. Thus, a new heat transfer correlation for R254fa was proposed. The new correlation has a Mean Absolute Error of 11.7% for the experimental data of a tube with an inner tube diameter of 3 mm. Finally, this new correlation was also verified with R245fa datasets of other authors.
机译：对R254fa进行了241次传热测量。确定内管直径为3 mm的光滑不锈钢管的传热系数。在五个质量通量（100、300、500、700和1000kg /（m〜2s）），三个热通量（10、30和50 kW / m2）和三个饱和温度（40℃，70℃）下进行了实验和125℃）。实验用于确定饱和温度，质量通量，热通量，蒸汽质量和流动方式对传热系数的影响。在低饱和温度下，传热系数随着质量通量的增加而增加。然而，在高饱和温度下，传热系数随着质量通量的增加而降低。此外，在低饱和温度下，传热系数随着蒸气质量的增加而增加。相反，在较高的饱和温度下传热系数降低。由于文献中发现的大多数传热模型都是针对低饱和温度和一种流动状态而开发的，因此现有模型预测的传热系数与实验数据不太吻合。因此，提出了一种新的R254fa传热相关性。对于具有3 mm内管直径的管的实验数据，新的相关性具有11.7％的平均绝对误差。最后，还使用其他作者的R245fa数据集验证了这种新的相关性。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2018年第2期|1304-1311|共8页
  • 作者

    Marijn Billiet; Bernd Ameel; Romain Charnay; Remi Revellin; Michel De Paepe;

  • 作者单位

    Department of Flow, Heat and Combustion Mechanics, Ghent University, Sint-Pietersnieuwstraat 41, 9000 Chent, Belgium;

    Department of Flow, Heat and Combustion Mechanics, Ghent University, Sint-Pietersnieuwstraat 41, 9000 Chent, Belgium;

    Univ Lyon, CNRS, INSA-Lyon, University Claude Bernard Lyon 1, CETH1L UMR5008, F-69621 Villeurbanne, France;

    Univ Lyon, CNRS, INSA-Lyon, University Claude Bernard Lyon 1, CETH1L UMR5008, F-69621 Villeurbanne, France;

    Department of Flow, Heat and Combustion Mechanics, Ghent University, Sint-Pietersnieuwstraat 41, 9000 Chent, Belgium;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Two-phase; Refrigerant; Heat transfer measurement;

    机译：两相制冷剂传热测量;

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