A Study of the Evaporation Heat Transfer in Advanced Reactor Containment

  • Y. M. Kang (Seoul National University Department of Nuclear Engineering) ;
  • Park, G. C. (Seoul National University Department of Nuclear Engineering)
  • Published : 1997.08.01

Abstract

In advanced nuclear reactors, the passive containment cooling has been suggested to enhance the safety. The passive cooling has two mechanisms, air natural convection and oater cooling with evaporation. To confirm the coolability of PCCS, many works have been performed experimentally and numerically. In this study, the water cooling test was performed to obtain the evaporative heat transfer coefficients in a scaled don segment type PCCS facility which have same configuration with AP600 prototype containment. Air-steam mixture temperature and velocity, relative humidity and well heat flux are measured. The local steam mass flow rates through the vertical plate part of the facility are calculated from the measured data to obtain evaporative heat transfer coefficients. The measured evaporative heat transfer coefficients are compared with an analytical model which use a mass transfer coefficients. From the comparison, the predicted coefficients show good agreement with experimental data however, some discrepancies exist when the effect of wave motion is not considered. Finally, a new correlation on evaporative heat transfer coefficients are developed using the experimental values.

Keywords

References

  1. Int. J. Heat and Mass Transfer v.33 Heat and Mass Transfer in Evaporating Two Component Liquid Film Flow W.W. Baumann;F. Thiele
  2. Int. J. Heat and Mass Transfer v.23 Combined Heat and Mass Transfer in Natural Convection along a Vertical Cylinder T.S. Chen;C.F. Yuh
  3. Int. J. Heat and Mass Transfer v.29 Natural Convection Flows in a Vertical, Open tube Resulting from Combined Buoyancy Effects of Thermal and Mass Diffusion C.J. Chang;T.F. Lin;W.M. Yan
  4. Int. J. Heat and Mass Transfer v.34 Evaporative Cooling of Liquid Film through Interfacial Heat and Mass Transfer in a Vertical Channel W.M. Yan;T.F. Lin;Y.L. Tsay
  5. Journal of Heat Transfer Heat Transfer to Evaporating Liquid Films K.R. Chun;R.A. Seban
  6. Int. J. Heat and Mass Transfer v.34 Surface Evaporation of Turbulent Falling Films Thore Bemtsson(et. al.)
  7. Proceeding of International Conference on New Trends in Nuclear Thermohydraulics Advanced PWR Passive Containment Cooling Experimental Program F.E. Peters(et. al.)
  8. Proceeding of International Conference on New Trends in Nuclear Thermohydraulics Heat Transfer from a Plate Cooled by a Water film with Count-current Air Flow W. Ambrosini(et. al.)
  9. Principles of Heat Transfer(Italian edition) F.Kreith
  10. Ph. D. Thesis, University of Wisconsin-Madison Modeling of Condensation Heat Transfer In a Reactor Containment M.H. Kim
  11. Heat Transfer(7th edition) J.P. Holman
  12. Convective Boiling And Condensation(2nd edition) J.G. Colbum
  13. Heat Transmission(3rd edition) W.H. McAdams
  14. Proceedings of the AFERC Conference Experimental Research on the Interfacial Characteristics in a Stratified Flow M.H. Kim;H.C. Kang
  15. Ph. D Thesis, Seoul National University A Theoritical Modeling of Heat Transfer and Evaporation in the Vertical Channel Related to PCCS, and Development of Correlations H.O. Kang