Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Enhancement of Pool Boiling Heat Transfer Coefficients with the Use of Carbon Nanotubes

탄소나노튜브 사용 풀비등 열전달 촉진

  • Park Ki-Jung (Graduate School of Mechanical Engineering, Inha University) ;
  • Jung Dong-Soo (Department of Mechanical Engineering, Inha University)
  • Published : 2006.10.01
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Abstract

In this study, the effect of carbon nanotubes (CNTs) on boiling heat transfer is investigated. Three refrigerants of R22, R123, R134a, and water are used as base working fluids and 1% of CNTs by volume is added to the base fluids to study the effect of CNTs. All data are obtained at the pool temperature of $7^{\circ}C$ for all refrigerants and $100^{\circ}C$ for water in the heat flux range of $10{\sim}80\;kW/m^2$. Test results show that CNTs increase the boiling heat transfer coefficients for all fluids. Especially, large enhancement was observed at low heat flutes. With increasing heat flux, however, the enhancement was suppressed due to vigorous bubble generations. Fouling was not observed during the course of this study. Optimum quantity and type of CNTs and their dispersion should be examined for their application in pool boiling heat transfer.

Keywords

References

  1. Webb, R. L., 1994, Principles of enhanced heat transfer, John Wiley & Sons, Inc., New York, pp.293-294
  2. Ohadi, M. M., 1991, Electrohydro-dynamic (EHD) enhancement of heat transfer in heat exchangers, ASHRAE Journal, Dec
  3. Eastman, J. A., Choi, U. S., Li, S., Thompson, L.J. and Lee, S., 1997, Enhanced thermal conductivity through the development of nano-fluids, Proc., Symposium on Nanophase and Nanocomposite materials II, Materials Research Society, Boston, Vol. 457, pp.3-11
  4. Lee, S., Choi, U. S., Li, S. and Eastman, J. A., 1999, Measuring thermal conductivity of fluids containing oxide nanoparticles, ASME J. Heat Transfer, Vol. 121, pp.280-289 https://doi.org/10.1115/1.2825978
  5. Das, S. K, Putra, N. and Roetzel, W., 2003, Pool boiling charactersitics of nano fluids, Int. J. Heat Mass Transfer, Vol. 46, pp. 851-862 https://doi.org/10.1016/S0017-9310(02)00348-4
  6. Vassallo, P. V., Kumar, R. and D'Amico, S., 2004, Pool boiling heat transfer experiments in silica-water nano fluids, Int. J. Heat Mass Transfer, Vol. 47, pp.407-411 https://doi.org/10.1016/S0017-9310(03)00361-2
  7. Bang, I. C. and Chang, S. H., 2004, Boiling heat transfer performance and phenomena of $Al_2O_3$-water nano fluids from a plain surface in a pool, Pro. ICAPP, pp.1-7
  8. Ajayan, P. M., 1999, Nanotubes from carbon, Chem. Rev., Vol. 99, pp.1787-1799 https://doi.org/10.1021/cr970102g
  9. Dresselhaus, M. S., Dresselhaus, G. and Avouris, P., 2001, Carbon nanotubes: Synthesis, Structure, Properties and Applications, Eds., Springer, New York, Vol. 80
  10. Baughman, R. H., Zakhidov, A. A. and de Heer, W. A., 2002, Carbon nanotubes - the Route Toward Applications, Science, 297, 787 https://doi.org/10.1126/science.1060928
  11. Jung, D., Kim, Y., Ko, Y. and Song, K., 2003, Nucleate boiling heat transfer coefficients of pure halogenated refrigerants, Int. J. of Refrigeration, Vol. 26, No.2, pp.240-248 https://doi.org/10.1016/S0140-7007(02)00040-3
  12. Lee, J. K., Ko, Y.H., Song, K. H., Jung, D. S. and Kim, C. B., 1998, Pool boiling heat transfer coefficients of alternative refrigerants in enhanced tubes, Transactions of the Korea Society of Mechanical Engineers B, Vol. 22, No.7, pp.980-991
  13. Kline, S. J. and McClintock, F. A., 1953, Describing uncertainties in single-sample experiments, Mechanical Engineer, Vol. 75, pp, 3-9
  14. Stephan, K. and Abdelsalam, M., 1980, Heat transfer correlations for natural convection boiling, Int. J. Heat Mass Transfer, Vol. 23, pp.73-87 https://doi.org/10.1016/0017-9310(80)90140-4
  15. Cooper, M. G., 1982, Correlations for nucleate boiling formulation using reduced properties, PCH, Vol.3, No.2, pp. 89-111
  16. You, S. M. and Kim, J, H., 2003, Effect of nanoparticles on critical heat flux of water in pool boiling heat transfer, Applied Physic Letter, Vol. 83, pp.3374-3376 https://doi.org/10.1063/1.1619206