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논문 상세정보


The direct contact condensation phenomenon, which occurs when steam is injected into the subcooled water, has been experimentally investigated. Two plume shapes in the stable condensation regime are found to be conical and ellipsoidal shapes depending on the steam mass flux and the liquid subcooling. Divergent plumes, however, are found when the subcooling is relatively small. The measured expansion ratio of the maximum plume diameter to the injector inner diameter ranges from 1.0 to 2.3. By means of fitting a large amount of measured data, an empirical correlation is obtained to predict the steam plume length as a function of a dimensionless steam mass flux and a driving potential for the condensation process. The average heat transfer coefficient of direct contact condensation has been found to be in the range 1.0~3.5 ㎿/$m^2$.$^{\circ}C$. Present results show that the magnitude of the average condensation heat transfer coefficient depends mainly on the steam mass fin By using dynamic pressure measurements and visual observations, six regimes of direct contact condensation have been identified on a condensation regime map, which are chugging, transition region from chugging to condensation oscillation, condensation oscillation, bubbling condensation oscillation, stable condensation, and interfacial oscillation condensation. The regime boundaries are quite clearly distinguishable except the boundaries of bubbling condensation oscillation and interfacial oscillation condensation.

참고문헌 (22)

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  2. Condensation Measurement of Horizontal Concurrent Steam/Water Flow , I.S. Lim(et al.) , J. of Heat Transfer / v.106,pp.425-432, 1984
  3. Vapor-Liquid Interaction in a High Velocity Vapor Jet Condensing in a Coaxial Water Flow , R.J. Young(et al.) , Proc. 5th Int. Heat Transfer Conf. / v.3,pp.226-230, 1974
  4. The Potential for Penetration of a Hot Vapor Jet into a Subcooled Liquid , S.S. Tsai;M.S. Kazimi , ASME 76-WA/HT-78 / v.,pp., 1976
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  10. Heat Transfer in Condensing Jets of Steam in Water , M. Cumo(et al.) , Proc. 6th Int. Heat Transfer Conf. / v.5,pp.101-106, 1978
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  17. Condensation of Submerged Vapor Jets in Subcooled Liquids , L.D. Chen;G.M. Faeth , J. of Heat Transfer / v.104,pp.774-780, 1982
  18. Pressure and Temperature Measurement in a Vapor Condensing Jet , G. D. Tin(et al.) , Proc. 7th Int. Heat Transfer Conf. / v.6,pp.159-164, 1982
  19. Experimental Investigation of Horizontal Liquid Film: Wave Formation, Atomization, Film Thickness , J.J. van Rossum , Chemical Engineering Science / v.11,pp.35-52, 1959
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  21. A Regime Map for Direct Contact Condensation , C.K. Chan;C.K. B. Lee , Int. J. Multiphase Flow / v.8,pp.11-20, 1982
  22. Hydrodynamics of a Subsonic Vapor Jet in Subcooled Liquid , M.E. Simpson;C.K. Chan , J. of Heat Transfer / v.104,pp.271-278, 1982

이 논문을 인용한 문헌 (1)

  1. 2003. "Review of Steam Jet Condensation in a Water Pool" 에너지공학 = Journal of energy engineering, 12(2): 74~83 


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