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Critical heat flux of a two-phase closed thermosyphon with fins

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Abstract

The critical heat fluxes (CHFs) of two-phase closed thermosyphons with and without fins were studied. The thermosyphons were fabricated using 1.25-mm-thick iron tubes with inner diameters of 16, 21 and 26 mm. The lengths of the evaporator, adiabatic, and condensation sections were 20, 10 and 20 cm, respectively. Pure water, ethanol, and R134a refrigerant were used as the working fluids with 50 % filling rate of the evaporation length. CHF data when using fins of different thicknesses (1.0, 1.5 and 2.0 mm), radii (5, 10 and 15 mm), and spacing (10, 20 and 30 mm) were recorded. The CHF increased with the fin thickness and radius but decreased with the increase in fin spacing. In addition, the CHF increased with the diameter of the thermosyphon tube. Overall, the CHF of thermosyphons with fins was higher than that of thermosyphons without fins regardless of the working fluid.

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Authors and Affiliations

  1. Heat-Pipe and Thermal Tools Design Research Unit, Department of Mechanical Engineering, Faculty of Engineering, Mahasarakham University, Kantarawichai District, MahaSarakam Province, 44000, Thailand

    Wasan Pinate & Sampan Rittidech

  2. Department of Physics, Faculty of Science, Mahasarakham University, Kantarawichai District, MahaSarakam Province, 44000, Thailand

    Pattanapol meena

Authors
  1. Wasan Pinate
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  2. Sampan Rittidech
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  3. Pattanapol meena
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Corresponding author

Correspondence to Sampan Rittidech.

Additional information

Recommended by Associate Editor Youngsuk Nam

Wasan Pinate is a post doctor of Heat- Pipe and Thermal Tools Design Research Unit, Department of Mechanical Engineering, Faculty of Engineerig Mahasarakham University, Kantarawichai District, MahaSarakam province, Thailand 44000.

Sampan Rittidech is a Lecturer of Heat-Pipe and Thermal Tools Design Research Unit, Department of Mechanical Engineering, Faculty of Engineerig Mahasarakham University, Kantarawichai District, MahaSarakam province, Thailand 44000.

Pattanapol meena is a Lecturer of Department of Physics, Faculty of Science Mahasarakham University, Kantarawichai District, MahaSarakam province, Thailand 44000.

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Pinate, W., Rittidech, S. & meena, P. Critical heat flux of a two-phase closed thermosyphon with fins. J Mech Sci Technol 32, 2357–2364 (2018). https://doi.org/10.1007/s12206-018-0447-7

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  • DOI: https://doi.org/10.1007/s12206-018-0447-7

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