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Numerical Investigation on the Flow and Heat Transfer Characteristics of Supercritical Liquefied Natural Gas in an Airfoil Fin Printed Circuit Heat Exchanger

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  • Zhongchao Zhao

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 210000, China)

  • Kai Zhao

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 210000, China)

  • Dandan Jia

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 210000, China)

  • Pengpeng Jiang

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 210000, China)

  • Rendong Shen

    (School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 210000, China)

Abstract

As a new kind of highly compact and efficient micro-channel heat exchanger, the printed circuit heat exchanger (PCHE) is a promising candidate satisfying the heat exchange requirements of liquefied natural gas (LNG) vaporization at low and high pressure. The effects of airfoil fin arrangement on heat transfer and flow resistance were numerically investigated using supercritical liquefied natural gas (LNG) as working fluid. The thermal properties of supercritical LNG were tested by utilizing the REFPROF software database. Numerical simulations were performed using FLUENT. The inlet temperature of supercritical LNG was 121 K, and its pressure was 10.5 MPa. The reference mass flow rate of LNG was set as 1.22 g/s for the vertical pitch L v = 1.67 mm and the staggered pitch L s = 0 mm, with the Reynolds number of about 3750. The SST k-ω model was selected and verified by comparing with the experimental data using supercritical liquid nitrogen as cold fluid. The airfoil fin PCHE had better thermal-hydraulic performance than that of the straight channel PCHE. Moreover, the airfoil fins with staggered arrangement displayed better thermal performance than that of the fins with parallel arrangement. The thermal-hydraulic performance of airfoil fin PCHE was improved with increasing L s and L v . Moreover, L v affected the Nusselt number and pressure drop of airfoil fin PCHE more obviously. In conclusion, a sparser staggered arrangement of fins showed a better thermal-hydraulic performance in airfoil fin PCHE.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:11:p:1828-:d:118416
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    References listed on IDEAS

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    1. Liu, Shanshan & Jiao, Wenling & Wang, Haichao, 2016. "Three-dimensional numerical analysis of the coupled heat transfer performance of LNG ambient air vaporizer," Renewable Energy, Elsevier, vol. 87(P3), pages 1105-1112.
    2. Yousefi, Amin & Birouk, Madjid, 2017. "Investigation of natural gas energy fraction and injection timing on the performance and emissions of a dual-fuel engine with pre-combustion chamber under low engine load," Applied Energy, Elsevier, vol. 189(C), pages 492-505.
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    Cited by:

    1. Li Lei & Yuting Zhao & Wukai Chen & Huiling Li & Xinyu Wang & Jingzhi Zhang, 2021. "Experimental Studies of Droplet Formation Process and Length for Liquid–Liquid Two-Phase Flows in a Microchannel," Energies, MDPI, vol. 14(5), pages 1-17, March.
    2. 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.
    3. 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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