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Heat transfer performance of wavy-channeled PCHEs and the effects of waviness factors

机译:波状PCHE的传热性能及波纹度的影响

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摘要

The printed circuit heat exchanger (PCHE) is a key component in the future compact energy cycles due to its high heat transfer performance and structural rigidity. In this study, the thermal performance of wavy-channeled PCHEs, and the effects of the waviness factors: the amplitude and the period, on the thermal performance of the PCHE are investigated numerically. The thermal performance of the wavy-channeled PCHEs is compared with that of conventional PCHEs with straight channels. Based on the numerical results, it has been shown that the wavy-channeled PCHEs can have significantly higher thermal performance than the conventional straight-channeled PCHEs due to the increased area for heat transfer. The effect of recirculating flow induced by the waviness is estimated to be negligible for the typical range of CO_2 mass flow rate of compact power generations. It has been shown that the performance enhancement can be predicted using a sole nondimensional parameter: the ratio between amplitude and period, and has linear relationship with this nondimensional parameter.
机译:印刷电路换热器(PCHE)由于其高的传热性能和结构刚性,是未来紧凑型能源循环中的关键组件。在这项研究中,数值研究了波状PCHE的热性能,以及波度因素:振幅和周期对PCHE的热性能的影响。将波浪形通道PCHE的热性能与具有直通道的常规PCHE的热性能进行了比较。基于数值结果,已经表明,由于增加了传热面积,所以与常规的直通道PCHE相比,波浪通道的PCHE可以具有显着更高的热性能。对于小型发电的CO 2质量流量的典型范围,估计由波纹引起的再循环流的影响可以忽略。已经表明,可以使用唯一的无量纲参数(幅度与周期之比)来预测性能增强,并且与该无量纲参数具有线性关系。

著录项

  • 来源
  • 作者单位

    Korea Institute of Energy Research, Daejeon, South Korea;

    School of Mechanical Engineering, Yeungnam University, Gyeongsan, South Korea;

    School of Mechanical Engineering, Yeungnam University, Gyeongsan, South Korea;

    School of Mechanical and Nuclear Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea;

    School of Mechanical and Nuclear Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea;

  • 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

    PCHE; Supercritical CO_2 cycle; Wavy;

    机译:PCHE;超临界CO_2循环;波浪状的;

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