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Experimental and Numerical Analysis of Condensation Heat Transfer and Pressure Drop of Refrigerant R22 in Minichannels of a Printed Circuit Heat Exchanger

Author

Listed:
  • Shilin Li

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China)

  • Zhongchao Zhao

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China)

  • Yanrui Zhang

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China)

  • Haijia Xu

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China)

  • Weiqin Zeng

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China)

Abstract

A Printed Circuit Heat Exchanger (PCHE) is a type of highly complete and efficient heat exchanger that consists of numerous mini/micro-channels and has been successfully applied to the Liquefied Natural Gas (LNG) regasification project. During the research presented in this paper, the condensation flow and heat transfer performance of the R22 in PCHE hot side minichannels are analyzed via experiments and numerical simulations, respectively. A liquid nitrogen–R22 experimental loop is established to examine the pressure difference and heat transfer coefficient of R22 in the minichannels of the PCHE hot side. The inlet pressures of the R22 range from 0.5 MPa to 0.65 MPa, the mass flux values are changed from 10.52 kg m − 2 s − 1 to 109.42 kg m − 2 s − 1 , and the inlet temperatures vary from 273 K to 289 K. The differences between experiments and simulations are analyzed by comparing the experimental values of the Nusselt number (Nu) and the friction pressure gradient with the numerical ones. Furthermore, the influences of pressure and mass flux on the Nu, as well as the friction pressure gradient, are analyzed in depth through condensation flow regimes to explore the underlying mechanism giving the results.

Suggested Citation

  • Shilin Li & Zhongchao Zhao & Yanrui Zhang & Haijia Xu & Weiqin Zeng, 2020. "Experimental and Numerical Analysis of Condensation Heat Transfer and Pressure Drop of Refrigerant R22 in Minichannels of a Printed Circuit Heat Exchanger," Energies, MDPI, vol. 13(24), pages 1-19, December.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:24:p:6589-:d:461934
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    References listed on IDEAS

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    1. Zhongchao Zhao & Yimeng Zhou & Xiaolong Ma & Xudong Chen & Shilin Li & Shan Yang, 2019. "Effect of Different Zigzag Channel Shapes of PCHEs on Heat Transfer Performance of Supercritical LNG," Energies, MDPI, vol. 12(11), pages 1-15, May.
    2. Zhongchao Zhao & Yimeng Zhou & Xiaolong Ma & Xudong Chen & Shilin Li & Shan Yang, 2019. "Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs," Energies, MDPI, vol. 12(3), pages 1-19, February.
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    Cited by:

    1. Peng Sun & Yiping Lu & Jianfei Tong & Youlian Lu & Tianjiao Liang & Lingbo Zhu, 2021. "Study on the Convective Heat Transfer and Fluid Flow of Mini-Channel with High Aspect Ratio of Neutron Production Target," Energies, MDPI, vol. 14(13), pages 1-15, July.
    2. Eloy Hontoria & Alejandro López-Belchí & Nolberto Munier & Francisco Vera-García, 2021. "A MCDM Methodology to Determine the Most Critical Variables in the Pressure Drop and Heat Transfer in Minichannels," Energies, MDPI, vol. 14(8), pages 1-13, April.

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    More about this item

    Keywords

    printed circuit heat exchanger; minichannel; R22; pressure drop; heat transfer;
    All these keywords.

    JEL classification:

    • R22 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Household Analysis - - - Other Demand

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