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Numerical Study on Thermal Hydraulic Performance of Supercritical LNG in Zigzag-Type Channel PCHEs

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  • Zhongchao Zhao

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

  • Yimeng Zhou

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

  • Xiaolong Ma

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

  • Xudong Chen

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

  • Shilin Li

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

  • Shan Yang

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212000, China)

Abstract

In this paper, we study a promising plate-type heat exchanger, the printed circuit heat exchanger (PCHE), which has high compactness and is suitable for high-pressure conditions as a vaporizer during vaporization. The thermal hydraulic performance of supercritical produce liquefied natural gas (LNG) in the zigzag channel of PCHE is numerically investigated using the SST κ - ω turbulence model. The thermo-physical properties of supercritical LNG from 6.5 MPa to 10MPa were calculated using piecewise-polynomial approximations of the temperature. The effect of the channel bend angle, mass flux and inlet pressure on local convection heat transfer coefficient, and pressure drop are discussed. The heat transfer and pressure loss performance are evaluated using the Nusselt and Euler numbers. Nu/Eu is proposed to evaluate the comprehensive heat transfer performance of PCHE by considering the heat transfer and pressure drop characteristics to find better bend angle and operating conditions. The supercritical LNG has a better heat transfer performance when bend angle is less than 15° with the mass flux ranging from 207.2 kg/(m 2 ·s) to 621.6 kg/(m 2 ·s), which improves at bend angle of 10° and lower compared to 15° at mass flux above 414.4 kg/(m 2 ·s). The heat transfer performance is better at larger mass flux and lower operating pressures.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:3:p:548-:d:204743
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    References listed on IDEAS

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    1. Zhongchao Zhao & Kai Zhao & Dandan Jia & Pengpeng Jiang & Rendong Shen, 2017. "Numerical Investigation on the Flow and Heat Transfer Characteristics of Supercritical Liquefied Natural Gas in an Airfoil Fin Printed Circuit Heat Exchanger," Energies, MDPI, vol. 10(11), pages 1-18, November.
    2. Huang, Dan & Wu, Zan & Sunden, Bengt & Li, Wei, 2016. "A brief review on convection heat transfer of fluids at supercritical pressures in tubes and the recent progress," Applied Energy, Elsevier, vol. 162(C), pages 494-505.
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    Cited by:

    1. 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.
    2. Artur J. Jaworski, 2019. "Special Issue “Fluid Flow and Heat Transfer”," Energies, MDPI, vol. 12(16), pages 1-4, August.
    3. Hu Liu & Yankang Zhang & Pengfei Yu & Jingwen Xue & Lei Zhang & Defu Che, 2022. "Numerical Investigation on Thermal–Hydraulic Performance of a Printed Circuit Heat Exchanger for Liquid Air Energy Storage System," Energies, MDPI, vol. 15(17), pages 1-15, August.
    4. 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.

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