Journal of Mechanical Science and Technology

  • 제16권9호
  • /
  • Pages.1102-1111
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  • 2002
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  • 1738-494X(pISSN)
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  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

A Study on the Improvement of Heat Transfer Performance in Low Temperature Closed Thermosyphon

  • Han, Kyu-Il (School of Mechanical Engineering, Pukyong National University) ;
  • Yee, Seok-Su (School of Mechanical Engineering, Pukyong National University) ;
  • Park, Sung-Hyun (School of Mechanical Engineering, Pukyong National University) ;
  • Lee, Suk-Ho (School of Mechanical Engineering, Pukyong National University) ;
  • Cho, Dong-Hyun (Department of Mechanical Design Engineering, Daejin University)
  • 발행 : 2002.09.01
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초록

The study focuses on the heat transfer performance of two-phase closed thermosyphons with plain copper tube and tubes having 50, 60, 70, 80, 90 internal grooves. Three different working fluids(distilled water, methanol, ethanol) are used with various volumetric liquid fill charge ratio from 10 to 40%. Additional experimental parameters such as operating temperature and inclination angle of zero to 90 degrees are used for the comparison of heat transfer performance of the thermosyphon. Condensation and boiling heat transfer coefficients, heat flux are obtained using experimental data for each case of specific parameter. The experimental results are assessed and compared with existing correlations. The results show that working fluids, liquid fill charge ratio, number of grooves and inclination angle are very important factors for the operation of thermosyphons. The relatively high rate of heat transfer is achieved when the thermosyphon with internal grooves is used compared to that with plain tube. The optimum liquid fill charge ratio for the best heat transfer performance lies between 25% and 30%. The range of the optimum inclination angle for this study is 20$^{\circ}$～30$^{\circ}$ from the horizontal position.

키워드

참고문헌

  1. Andros, F. E., 1980, 'Heat Transfer Characteristics of the Two-Phase Closed Thermosyphon(Wickless Heat Pipe) Including Direct Flow Observation,' Ph. D. Thesis, Arizona State University
  2. Botemps, A., Goubier, C., Marquet, C., Solecki, J. C. and Nardi, C., 1987, 'Performance Limits of a Toluene Loaded Closed Two- Phasa Thermosyphon,' 6th IHPC, Grenoble, pp. 634-644
  3. Chen, M. M., 1987, 'Heat Transfer Performance of Two-Phase Closed Thermosyphons with Different Lengths,' 6th IHPC, Grenoble, pp. 647-651
  4. Cho, D. and Kwon, H., 1997, 'A Experimental Study on the Heat Transfer Performance inside inclined Thermosyphon for the Effect of the Ratio of Reynolds Number of Cooling to Hot Water,' Proc. KSME Spring Conf., pp. 405-410
  5. Clement, B. and Lee, Y., 1981, 'Additional Parameters in Two-Phase Closed Thermosyphon : Effects of Tube Diameter and Wall Thickness,' Int. J. of Heat and Mass Transfer, Vol. 24, No. 9, pp. 1554-1555 https://doi.org/10.1016/0017-9310(81)90223-4
  6. Cohen, H., Bayley, F. J., 1955, 'Heat Transfer Problem of Liquid Cooled Gas Turbine Blades,' Proc. Inst. Mech. Eng., 169-20, pp. 1063-1080
  7. Fledman, K. T., Srinivasan, Jr. and R., 1984, 'Investigation of Heat Transfer Limits in Two-Phase Closed Thermosyphon,' 5th IHPC, Tsukuba, pp. 30-35
  8. Gaugler, R. S., 1944, Heat Transfer Device, US Patent No.2350348, US Patent Application. Dec. 21, 1942
  9. Hahne, E. and Gross, U., 1981, 'The Influence of the Inclination Angle on the Performance of a Closed Two-Phase Thermosyphon,' 4th IHPC, London, pp. 125-135
  10. Hashimoto, H., Kaminaga, F. and Matsumura, K., 1999, 'Study on Condensation Heat Transfer Characteristics in a Thermosyphon with Non-Condensable Gas Effect,' 11th IHPC, Vol. 1, pp. 121-126
  11. Hong, J., Boo, J. and Jung, Y, 1998, 'Experiments on the Thermal Performance of a Thermosyphon in Inner Grooved Copper Tube,' Proc. SAREK Summer Conf., pp. 313-317
  12. Imura, H., Kusuda, H., Ogata, J. I., Miyaz, T. and Sakamoto, N., 1977, 'Heat Transfer in Two-Phase Closed-Type Thermosyphons,' Trans. of Japan Soc. of Mech. Engrs., pp. 485-493
  13. Kline, S. J. and McClintock, F. A., 1953, 'Describing Uncertainties in Single-Sample Experiments,' Mechanical Engineering, Vol. 75, pp. 3-8
  14. Larkin, B. S., 1971, 'A Experimental Study of the Two Phase Thermosyphon Tube,' Trans. Canda. Soc. Mech. Engrg., 14-B6, pp. 1-8
  15. Lee, Y. and Mital, U., 1972, 'A Two-Phase Closed Thermosyphon,' Int. J. of Heat and Mass Transfer, 15-9, pp. 1695-1707 https://doi.org/10.1016/0017-9310(72)90098-1
  16. Negishi, K. and Sawards, T., 1983, 'Heat Transfer Performance of an Inclined Two- Phase Closed Thermosyphon,' Int. J. of Heat and Mass Transfer, Vol. 26, No. 8, pp. 1207-1213 https://doi.org/10.1016/S0017-9310(83)80175-6
  17. Nusselt, W., 1916, 'Die Oberflachenkondensation des Wasserdampfes, Z. Ver. Deut. Ing., 60
  18. Park, R. J., 1992, 'Two-Phase Closed Thermosyphon with Two-Fluid Mixtures,' M. S. Thesis, Department of Mechanical Engineering, University of Ottawa, Ottawa, Ontario, Canada
  19. Peterson, G. P. and Ma, H. B., 1996, 'Experimental Investigation of the Maximum Heat Transport in Triangular Groove,' ASME J. of Heat Transfer, Vol. 35, No. 3, pp. 740-746
  20. Qi, W. and Lang, Y., 1999, 'Heat Transfer Characteristics of a Closed Two-Phase Thermosyphon Working with a Binary Mixture at Different Incline Angles,' 11th IHPC, Vol. 1, pp. 110-115
  21. Sterling, C. O. and Tichacek, L. J., 1961, 'Heat Transfer Coefficients for Boiling Mixtures,' Chem. Engrg Sci., 16, pp. 297-337 https://doi.org/10.1016/0009-2509(61)80040-7
  22. Stre'tsov, A. I., 1975, 'Theoretical and Experimental Investigation of Optimum Filling for Heat Pipes,' Heat Transfer, Soviet Research, Vol. 7, No. 1, pp. 23-27
  23. Tu, C., Xie, G., Hu, C., Gao, Z. and Hong, R., 1984, 'The Two Phase Closed Thermosyphon : an Experimental Study with Flow Pattern and Optimum Fill Charge,' China-U. S. Seminar on Two-flows and Heat Transfer, Sian, pp. 395-405
  24. Yiwei, M., Wang, J. C. Y., Jifu, L. and Yi, F., 1989, 'Theoretical and Experimental Studies on Condensation Heat Transfer inside Vertical and Inclined Thermosyphons,' National Heat Transfer Conference HTD-vol, 108, pp. 111-116