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首页> 外文期刊>International Journal of Heat and Mass Transfer >Development of heat transfer correlations for multi-row helically coiled tube heat exchangers used in surface water heat pump systems
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Development of heat transfer correlations for multi-row helically coiled tube heat exchangers used in surface water heat pump systems

机译：用于地面水热泵系统中使用的多排螺旋盘管热交换器传热相关性的开发

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摘要

For a type of multi-row helically coiled tube (MHCT) heat exchanger used in surface water heat pump systems, a series of numerical simulations for outside mixed and forced convections and experiments for natural convection are carried out with a conjugate thermal condition. The effects of geometric parameters of vertical spacing (△y), horizontal spacing (△x), tube length (L), and number of rows (K) on the outside Nusselt number (Nu_o) are detailed for 11 heat exchangers in different configurations. The results show that an increase in Ay or a decrease in K can increase Nu_o both in the forced and natural convections, whereas, there is a slight change in Nu_o as K ＞ 2 or △y - d_0 ≥ d_0. Furthermore, Nu_o is insensitive to changes in Ax and L The correlations for natural and forced convections are first developed by considering the effects of these geometric parameters. Then, the correlation for mixed convection is modeled using a function of the natural and forced convections. A dimensionless parameter, Gr/Re~(1/r), is proposed to divide the convection region and can be used to select the corresponding correlation for the design of the MHCT heat exchanger in different surface-water bodies.
机译：对于一种类型的多排螺旋盘管（MHCT）热交换器，用于地表水热泵系统，具有用于外部混合和强制对流的一系列数值模拟以及自然对流的实验，具有共轭热条件。垂直间隔（△Y），水平间距（△），管长度（L）和行外部NURSET NUMBER（NU_O）上的行数（k）的几何参数的影响在不同配置中为11个热交换器详述。结果表明，k的增加或减少可以在强制和自然对流中增加nu_o，而Nu_o为k> 2或△y-d_0≥d_0则略有变化。此外，Nu_O对AX的变化不敏感，L通过考虑这些几何参数的效果首先开发自然和强制对流的相关性。然后，使用自然和强制对流的函数建模混合对流的相关性。提出了一种无量纲参数Gr / Re〜（1 / R），以除去对流区域，并且可用于选择不同表面水体中MHCT热交换器的设计的相应相关性。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2020年第12期|120491.1-120491.16|共16页
  • 作者

    Chaohui Zhou; Yang Yao; Long Ni;

  • 作者单位

    School of Architecture Harbin Institute of Technology Harbin 150090 China Key Laboratory of Cold Region Urban and Rural Human Settlement Environments Science and Technology Ministry of Industry and Information Technology Harbin China;

    School of Architecture Harbin Institute of Technology Harbin 150090 China Key Laboratory of Cold Region Urban and Rural Human Settlement Environments Science and Technology Ministry of Industry and Information Technology Harbin China;

    School of Architecture Harbin Institute of Technology Harbin 150090 China Key Laboratory of Cold Region Urban and Rural Human Settlement Environments Science and Technology Ministry of Industry and Information Technology Harbin China;

  • 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

    Multi-row helically coiled tube; Surface water heat pump; Natural convection; Mixed convection; Forced convection;

    机译：多排螺旋盘管;地表水热泵;自然对流;混合对流;强迫对流;

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