Journal of Mechanical Science and Technology

  • 제20권5호
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  • Pages.681-691
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  • 2006
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  • 1738-494X(pISSN)
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  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

Electrohydrodynamic (EHD) Enhancement of Boiling Heat Transfer of R113+WT4% Ethanol

  • Oh Si-Doek (Power and Industrial Systems R&D Center, Hyosung Corporation) ;
  • Kwak Ho-Young (Mechanical Engineering Department, Chung-Ang University)
  • 발행 : 2006.05.01
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초록

Nucleate boiling heat transfer for refrigerants, R113, and R113+wt4% ethanol mixture, an azeotropic mixture under electric field was investigated experimentally in a single-tube shell/ tube heat exchanger. A special electrode configuration which provides a more uniform electric field that produces more higher voltage limit against the dielectric breakdown was used in this study. Experimental study has revealed that the electrical charge relaxation time is an important parameter for the boiling heat transfer enhancement under electric field. Up to 1210% enhancement of boiling heat transfer was obtained for R113+wt4% ethanol mixture which has the electrical charge relaxation time of 0.0053 sec whereas only 280% enhancement obtained for R113 which has relaxation time of 0.97 sec. With artificially machined boiling surface, more enhancement in the heat transfer coefficient in the azeotropic mixture was obtained.

키워드

참고문헌

  1. Basu, D. K., 1973, 'Effect of Electric Fields on Boiling Hysteresis in Carbon Tetrachloride,' Int. J. Heat Mass Transfer, Vol. 16, pp. 1322-1324 https://doi.org/10.1016/0017-9310(73)90139-7
  2. Bonjour, E. and Verdier, J., 1960, 'Mecanisme de L'ebullition Sous Champ Electrique,' C. R. Hebd, Seasons Acad. Sci., Paris, pp. 924-926
  3. Bryan, J. E. and Seyed-Yagoobi, J., 2000, 'Electrohydrodynamically Enhanced Convective Boiling : Relationship between Electrohydrodynamic Pressure and Momentum Flux Rate,' J. Heat Transfer, Vol. 122, pp. 266-277 https://doi.org/10.1115/1.521464
  4. Cotton, J., Robinson, A. J., Shoukri, M. and Chang, J. S., 2005, 'A Two-phase Flow Pattern Map for Annular Channels Under a DC Applied Voltage and the Application to Electrohydrodynamic Convection Boiling Analysis,' Int. J. Heat Mass Transfer, Vol. 48, pp. 5563-5579 https://doi.org/10.1016/j.ijheatmasstransfer.2005.05.032
  5. Cooper, P., 1990, 'EHD Enhancement of Nucleate Boiling,' ASME J. Heat Transfer, Vol. 112, pp. 458-464 https://doi.org/10.1115/1.2910400
  6. Han, S., Na, M., Oh, S. and Kwak, H., 1999, 'Electrohydrodynamic (EHD) Enhancement of Boiling Heat Transfer with a Lo-fin Tube,' KSME Int. J., Vol. 13, pp. 376-385 https://doi.org/10.1007/BF02939326
  7. Johnson, R. L., 1968, 'Effect of an Electric Field on Boiling Heat Transfer, AIAA J., Vol. 6, pp. 1456-1460 https://doi.org/10.2514/3.4788
  8. Judd, R. L. and Hwang, K. S., 1976, 'A Comprehensive Model for Nucleate Pool Boiling Heat Transfer Including Microlayer Evaporation,' ASME J. Heat Transfer, Vol. C98, pp. 623-629
  9. Kawahira, H., Kubo, Y., Yokoyama, T. and Ogata, J., 1990, 'The Effect of an Electric Field on Boiling Heat Transfer of Refrigerant-11 ; Boiling on a Single Tube,' IEEE Trans. Ind. Appl., Vol. 26, pp. 359-365 https://doi.org/10.1109/28.54264
  10. Markels, M. and Durfee, R. L., 1964, 'The Effect of Applied Voltage on Boiling Heat Transfer,' AIChE J., Vol. 10, pp. 106-110 https://doi.org/10.1002/aic.690100130
  11. Ogata, J., Iwafuji, Y., Shimada, Y. and Yamazaki, T., 1992, 'Boiling Heat Transfer Enhancement in Tube-bundle Evaporators Utilizing Electric Field Effects,' ASHRAE Trans.: Symposia, pp. 435-444 (BA-92-5-2)
  12. Oh, S. and Kwak, H., 2000, 'A Study of Bubble Behavior and Boiling Heat Transfer Enhancement Under Electric Field,' Heat Transfer Engineering, Vol. 21, pp. 33-45 https://doi.org/10.1080/01457630050144488
  13. Ohadi, M. M., Paper, R. A., Ng, T. L., Faani, M. A. and Radermacher, R., 1992, 'EHD Enhancement of Shell-side Boiling Heat Transfer Coefficients of R -123/ oil Mixture,' ASHRAE Trans. Symp., pp. 427 -434 (BA -92-5-1)
  14. Rohsenow, W. M., 1952. 'A Method of Cor？relating Heat Transfer Data for Surface Boiling of Liquids,' Trans. ASME Vol. 74, pp. 969-976
  15. Seyed-Yagoobi, J., Geppert, C. A. and Geppert, L. M., 1996, 'Electrohydrodynamically Enhanced Heat Transfer in Pool Boiling,' J. Heat Transfer, Vol. 118, pp. 233-237 https://doi.org/10.1115/1.2824048
  16. Singh, A., Kumar, A., Dessiatoun, S., Faani, M.A., Ohadi, M.M. and Ansari, A.I., 1993, 'Compound EHD-enhanced Pool Boiling of R-123 in a Liquid-to-Refrigerant Heat Exchanger,' Paper #93-WA/HT-40, ASME
  17. Snyder, T. J., Schneider, J. B. and Chung, J. N., 1996, 'A Second Look at Electrokinetic Phenomena in Boiling,' J. Appl. Phys., Vol. 79, pp. 6755-6760 https://doi.org/10.1063/1.361497
  18. van Stralen, S. and Cole, R., 1979, Boiling Phenomena, Hemisphere Publishing Corp., New York