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Heat Transfer Correlations for Single-Phase Flow, Condensation, and Boiling in Microfin Tubes

机译:微翅片管中单相流动,冷凝和沸腾的传热相关性

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摘要

Experimental single-phase, condensation and flow boiling heat transfer data from the literature and our previous studies were collected to evaluate existing heat transfer correlations for microfin tubes of different geometries. The Ravigururajan and Bergles correlation modified by using the hydraulic diameter proposed by Li et al. (2012) can predict single-phase heat transfer data relatively well. Among the four reviewed condensation heat transfer correlations, the Yu and Koyama (1998) correlation presents the best prediction. However, all the four condensation correlations are prone to overpredict the carbon dioxide data. For flow boiling in microfin tubes, the general semiempirical correlation developed by Wu et al. (2013), applicable for intermittent and annular flow patterns, is the most reliable predictive method among the five evaluated correlations. It can predict 90% of the overall 754 data points within a ±30% error band, with a mean absolute deviation and a standard deviation equal to 18.2% and 21.9%, respectively, covering pure halogenated refrigerants, near azeotropic refrigerant mixtures, and carbon dioxide with the following applicable range: fin root diameter 2.1 to 14.8 mm, mass flux 100 to 800 kg/m~2s, heat flux 4.5 to 59 kW/m~2, and reduced pressure 0.07 to 0.7.
机译:收集来自文献和我们先前研究的实验性单相,冷凝和沸腾传热数据,以评估不同几何形状的微翅片管的现有传热相关性。通过使用Li等人提出的水力直径来修正Ravigururajan和Bergles相关性。 (2012年)可以很好地预测单相传热数据。在四个综述的凝结传热相关中,Yu和Koyama(1998)的相关性提供了最好的预测。但是,所有四个冷凝关系都容易高估二氧化碳数据。对于微翅片管中的流动沸腾,由Wu等人开发的一般半经验相关性。 (2013年)适用于间歇和环形流动模式,是五种评估相关性中最可靠的预测方法。它可以预测在±30%误差范围内的全部754个数据点中的90%,平均绝对偏差和标准偏差分别等于18.2%和21.9%,涵盖纯卤化制冷剂,接近共沸制冷剂混合物和碳二氧化硫的适用范围如下:鳍根直径为2.1至14.8 mm,质量通量为100至800 kg / m〜2s,热通量为4.5至59 kW / m〜2,减压度为0.07至0.7。

著录项

  • 来源
    《Heat Transfer Engineering》 |2015年第8期|582-595|共14页
  • 作者单位

    Department of Energy Sciences, Lund University, Lund, Sweden;

    Department of Energy Sciences, Lund University, Box 118, Lund SE-22100, Sweden;

    PS2E Institute, Centre de recherche Claude-Delorme, Jouy-en-Josas, France;

    Department of Energy Engineering, Zhejiang University, Hangzhou, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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