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Thermal performance of heterogeneous PCHE for supercritical CO_2 energy cycle

机译：异质PCHE在超临界CO_2能量循环中的热性能

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摘要

The supercritical CO_2 (S-CO_2) energy cycles are gaining increasing attention due to its high efficiency in a compact footprint and ability to utilizing various heat sources. The printed circuit heat exchanger (PCHE) is regarded an essential component in the S-CO_2 cycle due to its high compactness and structural rigidity. In this study, an innovative type of PCHE, the heterogeneous type PCHE is proposed and its thermal performance is investigated numerically. The effect of channel sizes of heat source fluid and heat sink fluid, the spacing between the channels, and the channel cross-sectional shape on the thermal performance is analyzed. The results indicate that the thermal performance of the PCHE decreases monotonically as the either of channel size increases, because the flow velocity decreases subject to fixed mass flow rate condition. The spacing between the channels is shown to hardly affect the thermal performance of the PCHE. However, the spacing significantly affects the structural reliability of the PCHE. The channel cross-sectional shape also does not have significant effect on the thermal performance, provided that the hydraulic diameter of the channel remains constant.
机译：超临界CO_2（S-CO_2）能量循环因其紧凑的占地面积中的高效效率和利用各种热源的能力而受到越来越多的关注。印刷电路换热器（PCHE）由于其高紧凑性和结构刚性而被视为S-CO_2循环中的重要组成部分。在这项研究中，提出了一种创新型的PCHE，即异质型PCHE，并对其热性能进行了数值研究。分析了热源流体和散热器流体的通道尺寸，通道间距以及通道横截面形状对热性能的影响。结果表明，PCHE的热性能随通道尺寸的增加而单调降低，因为流速在固定质量流量条件下会降低。通道之间的间距显示几乎不会影响PCHE的热性能。但是，间距会显着影响PCHE的结构可靠性。只要通道的水力直径保持恒定，通道的横截面形状也不会对热性能产生重大影响。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2016年第11期|867-876|共10页
  • 作者

    Sangwoo Jeon; Young-Jin Baik; Chan Byon; Woojin Kim;

  • 作者单位

    School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea;

    Korea Institute of Energy Research, Daejeon 305-343, Republic of Korea;

    School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea;

    Technology Convergence R&BD Group, Korea Institute of Industrial Technology, Daegu 771-880, Republic of 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

    Supercritical CO_2 cycle; Heterogeneous; PCHE;

    机译：超临界CO_2循环;异质;PCHE;

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