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Numerical Analysis of Liquid–Liquid Heat Pipe Heat Exchanger Based on a Novel Model

Author

Listed:
  • Qilu Chen

    (School of Energy Science and Engineering, Nanjing Tech University, Nanjing 210000, China)

  • Yutao Shi

    (School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 210000, China)

  • Zhi Zhuang

    (School of Energy Science and Engineering, Nanjing Tech University, Nanjing 210000, China)

  • Li Weng

    (School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 210000, China)

  • Chengjun Xu

    (School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 210000, China)

  • Jianqiu Zhou

    (School of Energy Science and Engineering, Nanjing Tech University, Nanjing 210000, China)

Abstract

Heat pipe heat exchangers (HPHEXs) are widely used in various industries. In this paper, a novel model of a liquid–liquid heat pipe heat exchanger in a countercurrent manner is established by considering the evaporation and condensation thermal resistances inside the heat pipes (HPs). The discrete method is added to the HPHEX model to determine the thermal resistances of the HPs and the temperature change trend of the heat transfer fluid in the HPHEX. The established model is verified by the HPHEX structure and experimental data in the existing literature and demonstrates numerical results that agree with the experimental data to within a 5% error. With the current model, the investigation compares the effectiveness and minimum vapor temperature of the HPHEX with three types of HP diameters, different mass flow rates, and different H * values. For HPs with a diameter of 36 mm, the effectiveness of each is improved by about 0.018 to 0.029 compared to HPs with a diameter of 28 mm. The results show that the current model can predict the temperature change trend of the HPHEX well; in addition, the effects of different structures on the effectiveness and minimum vapor temperature are obtained, which improve the performance of the HPHEX.

Suggested Citation

  • Qilu Chen & Yutao Shi & Zhi Zhuang & Li Weng & Chengjun Xu & Jianqiu Zhou, 2021. "Numerical Analysis of Liquid–Liquid Heat Pipe Heat Exchanger Based on a Novel Model," Energies, MDPI, vol. 14(3), pages 1-19, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:3:p:589-:d:486123
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    References listed on IDEAS

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    4. Rafal Andrzejczyk, 2018. "Experimental Investigation of the Thermal Performance of a Wickless Heat Pipe Operating with Different Fluids: Water, Ethanol, and SES36. Analysis of Influences of Instability Processes at Working Ope," Energies, MDPI, vol. 12(1), pages 1-28, December.
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    Cited by:

    1. Łukasz Adrian & Szymon Szufa & Piotr Piersa & Piotr Kuryło & Filip Mikołajczyk & Krystian Kurowski & Sławomir Pochwała & Andrzej Obraniak & Jacek Stelmach & Grzegorz Wielgosiński & Justyna Czerwińska , 2021. "Analysis and Evaluation of Heat Pipe Efficiency to Reduce Low Emission with the Use of Working Agents R134A, R404A and R407C, R410A," Energies, MDPI, vol. 14(7), pages 1-29, March.
    2. Łukasz Adrian & Szymon Szufa & Piotr Piersa & Filip Mikołajczyk, 2021. "Numerical Model of Heat Pipes as an Optimization Method of Heat Exchangers," Energies, MDPI, vol. 14(22), pages 1-38, November.

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