Nuclear Engineering and Technology

  • 제38권1호
  • /
  • Pages.61-68
  • /
  • 2006
  • /
  • 1738-5733(pISSN)
  • /
  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
권호 표지

EXPERIMENTAL STUDY ON CHF CHARACTERISTICS OF WATER-TI02 NANO-FLUIDS

  • 발행 : 2006.02.01
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초록

CHF characteristics of nano- fluids were investigated with different volumetric concentrations of $TiO_2$ nanoparticles. Pool boiling experiments indicated that the application of nano-fluids, instead of pure water, as a cooling liquid significantly increased the CHF. SEM (scanning electron microscope) observations subsequent to the pool boiling experiments revealed that nanoparticles were coated on the heating surface during pool boiling of nano-fluids. In order to investigate the roles of nanoparticles in CHF enhancement ofb nano-fluids, pool boiling experiments were performed using (a) a nanoparticle-coated heater, prepared by pool boiling of nano-fluids, immersed in pure water and (b) a nanoparticle-coated heater immersed in nano-fluids. The results demonstrated two different roles of nanoparticles in CHF enhancement using nano-fluids: the effect of nanoparticles coated on the heater surface and the effect of nanoparticles suspended in nano- fluids.

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참고문헌

  1. S. M. You, J. H. Kim, and K. H. Kim, 'Effect of nanoparticles on critical heat flux of water in pool boiling heat transfer,' Applied Physics Letter, 83, 3374 (2003) https://doi.org/10.1063/1.1619206
  2. P. Vassallo, R. Kumar, and S. D'Amico, 'Pool boiling heat transfer experiments in silica-water nano-fluids,' Int. J. Heat Mass Transfer, 47, 407 (2004) https://doi.org/10.1016/S0017-9310(03)00361-2
  3. I. C. Bang and S. H. Chang, 'Boiling heat transfer performance and phenomena of Al2O3-water nano-fluids from a plain surface in a pool,' Int. J. Heat Mass Transfer, 48, 2407 (2005) https://doi.org/10.1016/j.ijheatmasstransfer.2004.12.047
  4. J. P. Holman, Experimental methods for engineers, 7th ed., Chap. 3, McGraw-Hill, (2001)
  5. N. Zuber, 'Hydrodynamic aspects of boiling heat transfer,' AEC Rep. AECU-4439 (1959)
  6. N. Barkhru and J. H. Lienhard, 'Boiling from small cylinders,' Int. J. Heat Mass Transfer, 15, 2011 (1972) https://doi.org/10.1016/0017-9310(72)90028-2
  7. J. M. Ramilison, P. Sadasivan, and J. H. Lienhard, 'Surface factors influencing burnout on flat heaters,' J. Heat Transfer, 114, 287 (1992) https://doi.org/10.1115/1.2911261
  8. N. Dinh, J. Tu, and T. Theofanous, 'Hydrodynamic and physico-chemical nature of bum out in pool boiling,' Proc. 5th Int. Conf. on Multiphase Flow, Yokohama, Japan, 2004
  9. J. Tehver, 'Influence of porous coating on the boiling burnout heat flux,' Recent Advances in Heat Transfer, 231 (1992)