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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental and numerical investigations of thermal-hydraulic characteristics in a novel airfoil fin heat exchanger
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Experimental and numerical investigations of thermal-hydraulic characteristics in a novel airfoil fin heat exchanger

机译：新型翼型翅片换热器中热液压特性的实验性和数值研究

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摘要

A novel airfoil fin (AFF) Printed Circuit Heat Exchanger (PCHE) with a 100 kW class heat transfer capacity was experimentally tested as a cooler in a supercritical CO_2 system. Numerical analysis was also conducted to have an insight into the flow and heat transfer mechanism in the AFF channels. The results showed that the novel AFF structure has superior hydraulic performance as the pressure drop in the AFF PCHE is only about 1/6 of that in the zigzag channel PCHE with a comparative heat transfer rate. In comparison with the mass flow rate and operating pressure, the inlet temperature has relatively insignificant effect on the heat transfer rate and pressure drop in the AFF heat exchanger. The broadening of the fin has no obvious improvement in heat transfer coefficient but increases the friction factor massively, and thereby resulting in worse comprehensive performance in the fin channel. At smaller temperature and mass flow rate, the periodic fluctuations of the heat transfer coefficient and comprehensive performance criterion could be weakened significantly. In addition, the determinant effect of the effective thermal conductivity in the viscous sublayer and buffer layer on local heat transfer coefficient is also validated in AFF channels.
机译：一种新型翼型翅片（AFF）印刷电路热交换器（PCHE），具有100 kW级传热容量在超临界CO_2系统中作为冷却器进行实验测试。还进行了数值分析，以了解AFF通道中的流动和传热机制。结果表明，新颖的液体结构具有优异的液压性能，因为AFF PCHE中的压降仅为Z字形通道PCHE中的约1/6，具有比较传热速率。与质量流量和操作压力相比，入口温度对交易热交换器中的传热速率和压力下降具有相对微不足道的影响。翅片的扩大在传热系数中没有明显的改善，而是增加摩擦系数，从而导致翅片通道中的综合性能更差。在较小的温度和质量流量下，传热系数和综合性能标准的周期性波动可能会显着减弱。另外，在局部传热系数上的粘性子层和缓冲层中有效导热率的决定性效果也在AFF通道中验证。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第8期|121333.1-121333.14|共14页
  • 作者

    Haiyan Zhang; Jiangfeng Guo; Xinying Cui; Jingzhi Zhou; Xiulan Huai; Huzhong Zhang; Keyong Cheng; Zengxiao Han;

  • 作者单位

    Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China School of engineering science University of Chinese Academy of Sciences Beijing 100049 China Nanjing Institute of Future Energy System IET CAS Nanjing 211135 China;

    Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China School of engineering science University of Chinese Academy of Sciences Beijing 100049 China Nanjing Institute of Future Energy System IET CAS Nanjing 211135 China;

    Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China School of engineering science University of Chinese Academy of Sciences Beijing 100049 China Nanjing Institute of Future Energy System IET CAS Nanjing 211135 China;

    Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China School of engineering science University of Chinese Academy of Sciences Beijing 100049 China Nanjing Institute of Future Energy System IET CAS Nanjing 211135 China;

    Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China School of engineering science University of Chinese Academy of Sciences Beijing 100049 China Nanjing Institute of Future Energy System IET CAS Nanjing 211135 China;

    Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China School of engineering science University of Chinese Academy of Sciences Beijing 100049 China Nanjing Institute of Future Energy System IET CAS Nanjing 211135 China;

    Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China School of engineering science University of Chinese Academy of Sciences Beijing 100049 China Nanjing Institute of Future Energy System IET CAS Nanjing 211135 China;

    Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China School of engineering science University of Chinese Academy of Sciences Beijing 100049 China Nanjing Institute of Future Energy System IET CAS Nanjing 211135 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

    Airfoil fin heat exchanger; Experiments; Simulations; Supercritical carbon dioxide; Thermal-hydraulic performance;

    机译：翼型翅式换热器;实验;模拟;超临界二氧化碳;热液压性能;

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