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An investigation of the performance of compact heat exchanger for latent heat recovery from exhaust flue gases

机译：紧凑型热交换器从烟道气中回收潜热的性能研究

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摘要

An experimental and theoretical investigation of the utilization of finned tube compact heat exchanger for a heat recovery steam generator (HRSG) to recover both sensible and latent heat is presented in this paper. The heat transfer and pressure drop characteristics of the fin-and-tube heat exchanger are theoretically studied. A correlation of the combined convection-condensation heat transfer is derived by using the heat and mass transfer analogy models. The experimental results have shown that the Colburn factor (j) and the friction factor (f) for humid air, simulating the exhaust of HRSG, are larger than those for dry air. It has been also found that the/factor difference between humid air and dry air decreases as the air side Reynolds number increases and both the/factor and the j factor for humid air increase with the increase of water vapour concentration. A scheme for the design of compact heat exchanger for HRSGs is presented.
机译：本文提出了利用翅片管紧凑型换热器用于热回收蒸汽发生器（HRSG）回收显热和潜热的实验和理论研究。理论研究了翅片管式换热器的传热和压降特性。通过使用传热和传质的类比模型，得出了对流-冷凝组合传热的相关性。实验结果表明，模拟HRSG排气的潮湿空气的Colburn因子（j）和摩擦因子（f）大于干燥空气的Colburn因子（j）和摩擦因子（f）。还已经发现，随着空气侧雷诺数的增加，湿空气和干空气之间的/因子差减小，并且湿空气的/因子和j因子都随着水蒸气浓度的增加而增加。提出了一种用于HRSG的紧凑型热交换器的设计方案。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2011年第3期|p.606-615|共10页
  • 作者

    Xiaojun Shi; Defu Che; Brian Agnew; Jianmin Gao;

  • 作者单位

    School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China,State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

    School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;

    School of the Built Environment, Northumbria University, Newcastle upon Tyne, UK;

    State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, 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

    compact heat exchanger; heat and mass transfer; latent heat recovery; finned tube; pressure loss;

    机译：紧凑型热交换器传热传质;潜热回收翅片管压力损失;

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