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Fluid Flow Distribution and Heat Transfer in Plate-Fin Heat Exchangers

机译：板翅式换热器中的流体分布和传热

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摘要

Single-phase and two-phase flow distribution in plate-fin heat exchangers and the influence of nonuniform fluid flow distribution on the thermal performance of such heat exchangers were experimentally investigated. The experimental results show that flow maldistribution can be a serious problem in plate-fin heat exchangers because of nonoptimized header configurations. The uneven distribution of two-phase flow in plate-fin heat exchangers is more pronounced than that of single-phase flow. It is shown that the uneven distributions result in a significant deterioration of the heat transfer performance. The relationship between the flow maldistribution characteristics and the resulting loss in heat exchanger effectiveness has been studied in this work. Certain improved header configurations with perforated plates were proposed in order to solve the maldistribution problem. It was found that the new header configurations could effectively improve the thermal performance of plate-fin heat exchangers. By changing the header configuration, the degree of flow and temperature nonuniformity in the plate-fin heat exchanger was reduced to 16.8% and 74.8%, respectively, under the main test condition.
机译：实验研究了板翅式换热器中的单相和两相流分布以及流体分布不均匀对这些热交换器的热性能的影响。实验结果表明，由于未优化的集管结构，在板翅式换热器中流量分布不均可能是一个严重的问题。板翅式换热器中两相流的不均匀分布比单相流更明显。结果表明，不均匀的分布导致传热性能显着下降。在这项工作中，已经研究了流量分布不均特性与换热器效率损失之间的关系。为了解决分布不均的问题，提出了某些改进的带有穿孔板的集管结构。发现新的联管箱配置可以有效地改善板翅式换热器的热性能。通过改变集管结构，在主要测试条件下，板翅式换热器的流量和温度不均匀度分别降低至16.8％和74.8％。

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  • 来源
    《Heat Transfer Engineering》 |2015年第11期|806-819|共14页
  • 作者

    ZHE ZHANG; SUNIL MEHENDALE; JINJIN TIAN; YANZHONG LI;

  • 作者单位

    Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Jinba Road, Tianjin 300134, China;

    School of Technology, Michigan Technological University, Houghton, Michigan, USA;

    Tianjin Key Laboratory of Refrigeration Technology, Tianjin University of Commerce, Tianjin, China;

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