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Advanced multi-evaporator loop thermosyphon

Author

Listed:
  • Mameli, M.
  • Mangini, D.
  • Vanoli, G.F.T.
  • Araneo, L.
  • Filippeschi, S.
  • Marengo, M.

Abstract

A novel prototype of multi-evaporator closed loop thermosyphon is designed and tested at different heaters position, inclinations and heat input levels, in order to prove that a peculiar arrangement of multiple heaters may be used in order to enhance the flow motion and consequently the thermal performance. The device consists in an aluminum tube (Inner/Outer tube diameter 3.0 mm/5.0 mm), bent into a planar serpentine with five U-turns and partially filled with FC-72, 50% vol. The evaporator zone is equipped with five heated patches (one for each U-turn) in series with respect to the flow path. In the first arrangement, heaters are wrapped on each bend symmetrically, while in the second layout heaters are located on the branch just above the U-turn, non-symmetrical with respect to the gravity direction, in order to promote the fluid circulation in a preferential direction. The condenser zone is cooled by forced air and equipped with a 50 mm transparent section for the flow pattern visualization. The non-symmetrical heater arrangement effectively promotes a stable fluid circulation and a reliable operation for a wider range of heat input levels and orientations with respect to the symmetrical case. In vertical position, the heat flux dissipation exceeds the pool boiling heat transfer limit for FC-72 by 75% and the tube wall temperatures in the evaporator zone are kept lower than 80 °C. Furthermore, the heat flux capability is up to five times larger with respect to the other existing wickless heat pipe technologies demonstrating the attractiveness of the new concept for electronic cooling thermal management.

Suggested Citation

  • Mameli, M. & Mangini, D. & Vanoli, G.F.T. & Araneo, L. & Filippeschi, S. & Marengo, M., 2016. "Advanced multi-evaporator loop thermosyphon," Energy, Elsevier, vol. 112(C), pages 562-573.
  • Handle: RePEc:eee:energy:v:112:y:2016:i:c:p:562-573
    DOI: 10.1016/j.energy.2016.06.074
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    References listed on IDEAS

    as
    1. Han, Xiaohong & Wang, Xuehui & Zheng, Haoce & Xu, Xiangguo & Chen, Guangming, 2016. "Review of the development of pulsating heat pipe for heat dissipation," Renewable and Sustainable Energy Reviews, Elsevier, vol. 59(C), pages 692-709.
    2. ., 2013. "Meeting the climate change challenge," Chapters, in: Strategic Public Private Partnerships, chapter 10, pages 111-122, Edward Elgar Publishing.
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    Cited by:

    1. Luo, Zhenbing & He, Wei & Deng, Xiong & Zheng, Mu & Gao, Tianxiang & Li, Shiqing, 2023. "A compacted non-pump self-circulation spray cooling system based on dual synthetic jet referring to the principle of two-phase loop thermosyphon," Energy, Elsevier, vol. 263(PB).
    2. Guo, Lukai & Lu, Qing, 2017. "Potentials of piezoelectric and thermoelectric technologies for harvesting energy from pavements," Renewable and Sustainable Energy Reviews, Elsevier, vol. 72(C), pages 761-773.
    3. Stålhammar, Sanna, 2021. "Polarised views of urban biodiversity and the role of socio-cultural valuation: Lessons from Cape Town," Ecosystem Services, Elsevier, vol. 47(C).
    4. Tawfik, M. & Tonnellier, X. & Sansom, C., 2018. "Light source selection for a solar simulator for thermal applications: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 90(C), pages 802-813.

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