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Enhancement of the performance heat transfer of a thermosyphon with fin and without fin heat exchangers using Cu-nanofluid as working fluids

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Abstract

This research demonstrates the enhancement of a thermosyphon heat exchanger with fins and without fins using Cu-nanofluid as a working fluid. The heat pipe-type thermosyphon used in this study was made of steel. The steel tube had an outside diameter of 20 mm and a thickness of 1.25 mm. The lengths of the evaporator, adiabatic and condenser sections were 20, 10, and 20 cm, respectively. The thermosyphon heat exchanger had 13 tubes with Di-water and Cu-nanofluid as working fluids, and a filling ratio of 50% by total volume. The exchangers were installed with two fin sizes: 0.5 and 1.0 cm. The fins were a 16 piece/pipe. The evaporator section was heated by a heater, while the condenser section was cooled by fresh air. The hot air was controlled at three levels: 60, 70, and 80°C, and the fresh air velocities were adjusted at three levels: 0.5, 1.0, and 1.5 m/s. The test operation focused on the heat transfer rate and thermal effectiveness of the thermosyphon heat exchanger with a fin using Cu-nanofluid as a working fluid. It was found that the maximum value of heat transfer rate and thermal effectiveness occurred when the air velocity was 0.5 m/s, 1 cm of fin, temperature 80°C, and using Cu-nanofluid as the working fluid. It is indicated that the heat transfer rate and thermal effectiveness performance increased when compared with DI-water at all variables.

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Authors and Affiliations

  1. Department of Physics, Energy Technology and Heat Pipe Laboratory (ETHL), Faculty of Science, Maha Sarakham University, 44150, Maha Sarakham, Thailand

    P. Meena, P. Tammasaeng, J. Kanphirom, A. Ponkho & S. Setwong

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  1. P. Meena
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  2. P. Tammasaeng
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  3. J. Kanphirom
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  4. A. Ponkho
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  5. S. Setwong
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Correspondence to P. Meena.

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Meena, P., Tammasaeng, P., Kanphirom, J. et al. Enhancement of the performance heat transfer of a thermosyphon with fin and without fin heat exchangers using Cu-nanofluid as working fluids. J. Engin. Thermophys. 23, 331–340 (2014). https://doi.org/10.1134/S1810232814040110

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  • DOI: https://doi.org/10.1134/S1810232814040110

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