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首页> 外文期刊>Heat Transfer Engineering >Improvements on Flow Distribution and Heat Transfer Performance of Plate-fin Heat Exchangers by Qusai-S Type Header Configuration
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Improvements on Flow Distribution and Heat Transfer Performance of Plate-fin Heat Exchangers by Qusai-S Type Header Configuration

机译：Qusai-S型联管箱结构改进了板翅式换热器的流量分布和传热性能

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摘要

In order to reduce flow maldistribution and enhance the heat transfer performance, an improved quasi-S-type header configuration of plate-fin heat exchangers is proposed. Based on the analysis of the fluid flow distribution, the results indicate that the outlet velocity of the conventional header is uneven. However, the qusai-S-type header not only effectively reduces the geometric mutation, but also extends the hydraulic path, which guides fluid to the two sides and thereby reduces the maldistribution. The qusai-S-type header was designed on the basis of the cubic curve (denoted as configuration B), Bezier curve (configuration C), or two semi-circular segments uniting with one-line segment (configuration D). Compared with the conventional header (configuration A), the maldistribution parameters for configuration B, C, and D decrease by 75.2-93.9%, 80-94.8%, and 78.4-94.3%, respectively. Yet, the power consumptions of them increase by 26.3%, 22.3%, and 42.3%, respectively. Besides, the effectiveness of the conventional plate-fin heat exchanger declines about 15.1% due to improper header configuration, while the decrease of effectiveness can be controlled within 2.0% using the improved header configurations. Therefore, the improved header configurations can effectively enhance the flow uniformity and the heat exchanger effectiveness, but with a low power consumption penalty.
机译：为了减少流量分配不均，提高传热性能，提出了一种改进的板翅式换热器准S型集管结构。基于对流体流量分布的分析，结果表明常规集管的出口速度不均匀。但是，qusai-S型集管不仅有效地减少了几何变形，而且还扩展了液压路径，从而将流体引导至两侧，从而减少了分布不均。 qusai-S型集管是根据三次曲线（表示为配置B），贝塞尔曲线（配置C）或两个与单线段组合的半圆形段（配置D）设计的。与常规标头（配置A）相比，配置B，C和D的分布不均参数分别降低了75.2-93.9％，80-94.8％和78.4-94.3％。但是，它们的功耗分别增加了26.3％，22.3％和42.3％。此外，传统的板翅式换热器的效率由于不正确的集管结构而下降了约15.1％，而使用改进的集管结构可以将效率的下降控制在2.0％以内。因此，改进的集管构造可以有效地提高流动均匀性和热交换器效率，但是具有低功耗损失。

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  • 来源
    《Heat Transfer Engineering》 |2017年第18期|1547-1560|共14页
  • 作者

    Huizhu Yang; Jian Wen; Xin Gu; Ke Li; Simin Wang; Yanzhong Li;

  • 作者单位

    Department of Refrigeration and Cryogenics Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China;

    Department of Refrigeration and Cryogenics Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China;

    Department of Refrigeration and Cryogenics Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China;

    Department of Refrigeration and Cryogenics Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, China;

    Department of Process Equipment and Control Engineering, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, China;

    Department of Refrigeration and Cryogenics Engineering, 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);
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