Browse > Article
http://dx.doi.org/10.3795/KSME-B.2002.26.12.1646

The Effect of the Fill Charge Ratio on the Heat Transfer Characteristics of a Two-Phase Closed Thermosyphon  

Park, Yong-Joo (성균관대학교 대학원 기계공학부)
Hong, Sung-Eun (유한전문대학 건축설비과)
Kim, Chul-Ju (성균관대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.26, no.12, 2002 , pp. 1646-1654 More about this Journal
Abstract
A two-phase closed thermosyphon was one of the most effective devices in the removing heat because of its simple structure, thermal diode characteristics, wide operating temperature range and so on. In this study, a two-phase closed thermosyphon(working fluid PFC(C6F14), container copper(inner grooved surface)) was fabricated with a reservoir which can change the fill charge ratio. The experiments were performed in the range of 50~600W heat flow rate and 10~70% fill charge ratio. The results were compared with some correlations that were presented by Rohsenow and Immura et al. in the evaporator, by Nusselt, Gross and Uehara et al. in the condenser and by Cohen and Bayley, Wallis, Kutateladze and Faghri et al. in heat transfer limitation etc.. The heat transfer coefficient at the evaporator increased with the input power. However the effect of the fill charge ratio was nearly negligible. At the condenser, it showed an opposite trend to the evaporator and with increase of the fill charge ratio, showed some enhancement of heat transfer. The heat transport limitation was occurred by the dry-out limitation for small fill charge ratio(10%) and presented about 100W. For the case of large fill charge ratio(Ψ$\geq$40%), it was occurred by the flooding limitation at about 500W.
Keywords
Two-Phase Closed Thermosyphon; Flooding; Dry-out; Fill Charge Ratio; Critical Heat Flux; Maximum Heat Rate;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Faghri, A., 1995, Heat Pipe Science and Technology, Taylor & Francis, pp. 1-60
2 Cohen, H. and Bayley, F. J., 1955, 'Heat Transfer Problems of Liquid-Cooled Gas-Turbine Blades,' Proc. Instn. Mech. Engrs., Vol. 169, pp. 1063-1074   DOI
3 Charto, J. C. and Laurence, W. T., 1964, Development Heat Transfer, pp. 371-388
4 Kim, C. J., Kang. H. K., Lee, J. S. and Park, Y. J., 1997-2000, 'Design and Manufacturing of the Heat Sink using Heat Pipes,' Hyudai Heavy Industry Co., Report.(in Korean)
5 Schmidt, E., 1995, Proc. Instn. Mech. Engrs., Conf. ASME(London), pp. 361-363
6 Luca Rossi and Frantisek Polasek, 1999, 'Thermal Control of Electronic Equipment by Heat Pipes and Two-Phase Termosyphons,' 11th IHPC
7 Larkin, 1971, 'An Experimental Study of Two-Phase Thermosyphon Tube,' Trans. CSME, Vol. 14, pp. 17-24
8 Uehara, H., Kusuda, H., Nakaoka, T. and Yamada, A., 1983, 'Filmwise Condensation for turbulent Flow on a Vertical Plate,' Heat Transfr-Jap. Res., Vol. 12, pp. 85-96
9 Hong. S. E., 2002, 'A Study on Characteristics of Heat Transfer and Two-Phase Flow in PFC Thermosyphon,' SKKU, Doctoral Thesis
10 Shiraishi, M., Yoneya, M. and Yabe, A., 1984, 'Visual Study of Operating Limit in the Two-Phase Closed Thermosyphon,' Proc. 5th IHPC, pp. 10-17
11 Wallis, G. B., 1961, 'Flooding Velocities for air and water in vertical tubes,' AEEW-R123
12 Imura et al., 1979, Heat Transfer-Jap. Res., Vol. 32, p.41
13 Carey, V. P., 1992, Liquid-Vapor Phase Change Phenomena, Hemisphere Publication Co., pp. 222-245
14 Pushikina, O. L. and Sorokin, Y. L., 1969, 'Breakdown of liquid film motion in vertical tubes,' Heat Trans. Soviet Res., Vol. 1, No. 5, pp. 56-64
15 Gross, U., 1992, 'Reflux Condensation Heat Transfer Inside a Closed Thermosyphon,' Int. J. of Heat and Mass Trans., Vol. 35, pp. 279-294   DOI   ScienceOn
16 Wallis, G. B. and Makkenchery, S., 1974, 'The Hanging Film Phenomenon in vertical Annular Two-Phase Flow,' J. of Fluids Eng., No. 3, pp. 297-298
17 Kang, H. K., Kim. J. J. and Kim, C. J., 1999, 'A Study on Heat Transfer Limitation for a Perfluorocarbon Heat Pipe,' SAREK, Vol. 11, No. 3, pp. 313-332   과학기술학회마을
18 Kutateladze, S. S., 1972, 'Elements of Hydrodynamics of Gas-Liquid Systems,' Fluid Mechanics Soviet Res., Vol. 14, pp. 29-50
19 Tien, C. L. and Chung, K. S., 1978, 'Entrainment Limits in Heat Pipe,' Proc. 3rd, IHPC, pp. 36-40
20 Faghri, A., Chen, M. M. and Morgan, M., 1989, 'Heat transfer in Two-Phase Closed Conventional and Concentric Annular Thermosyphon,' Int. J. of Heat and Mass Trans., Vol. 111, pp. 611-618   DOI