Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
권호 표지
DOI QR코드

DOI QR Code

Pool boiling heat transfer of a copper microporous coating in borated water

  • Jun, Seongchul (Department of Mechanical Engineering, Erik Jonsson School of Engineering and Computer Science, The University of Texas at Dallas) ;
  • Godinez, Juan C. (Department of Mechanical Engineering, Erik Jonsson School of Engineering and Computer Science, The University of Texas at Dallas) ;
  • You, Seung M. (Department of Mechanical Engineering, Erik Jonsson School of Engineering and Computer Science, The University of Texas at Dallas) ;
  • Kim, Hwan Yeol (Korea Atomic Energy Research Institute Severe Accident & PHWR Safety Division)
  • Received : 2019.07.08
  • Accepted : 2020.02.27
  • Published : 2020.09.25
Download PDF
⟨ Previous Next ⟩

Abstract

Pool boiling heat transfer of a copper microporous coating was experimentally studied in borated water with a concentration of boric acid from 0.0 to 5.0 vol percent (vol%) to determine the effect of boric acid on boiling heat transfer in water. A high-temperature, thermally conductive microporous coating (HTCMC) was created by sintering copper powder with an average particle size of 67 ㎛ onto a 1 cm × 1 cm plain copper surface with a coating thickness of ~300 ㎛ within a furnace in a vacuum environment. The tests showed that the nucleate boiling heat transfer coefficient (NBHT) of HTCMC became slightly less enhanced as the concentration of boric acid increased but the NBHT coefficient values were still significantly higher than those of the plain surface. The critical heat flux (CHF) values from 0 to 1.0 vol% were maintained at ~2,000 kW/㎡, and then, they gradually decreased down to ~1,700 kW/㎡ as the concentration increased further to 5.0 vol%. It is believed that the micro-scale pores of the HTCMC were partially blocked by the high boric acid concentration during the nucleate boiling such that the small bubbles were not effectively created using the HTCMC reentrant cavities as the boric acid concentration increased.

Keywords

References

  1. Y. Yang, J. Maa, Pool boiling of dilute surfactant solutions, J. Heat Tran. 105 (1983) 190-192. https://doi.org/10.1115/1.3245541
  2. W. Wu, H. Lin, Y. Yang, J. Maa, Critical heat flux in pool boiling of aqueous surfactant solutions as determined by the quenching method, Int. J. Heat Mass Tran. 37 (1994) 2377-2379. https://doi.org/10.1016/0017-9310(94)90377-8
  3. Y. Tzan, Y. Yang, Experimental study of surfactant effects on pool boiling heat transfer, J. Heat Tran. 112 (1990) 207-212. https://doi.org/10.1115/1.2910346
  4. V. Wasekar, R. Manglik, Pool boiling heat transfer in aqueous solutions of an anionic surfactant, J. Heat Tran. 122 (2000) 708-715. https://doi.org/10.1115/1.1316785
  5. G. Hetstoni, J. Zakin, Z. Lin, A. Mosyak, E. Pancallo, R. Rozenblit, The effect of surfactants on bubble growth, wall thermal patterns and heat transfer in pool boiling, Int. J. Heat Mass Tran. 44 (2001) 485-497. https://doi.org/10.1016/S0017-9310(00)00099-5
  6. T. Inoue, Y. Teruya, M. Monde, Enhancement of pool boiling heat transfer in water and ethanol/water mixtures with surface-active agent, Int. J. Heat Mass Tran. 57 (2004) 5555-5563.
  7. P. Kortchaphakdee, M. Williams, Enhancement of nucleate pool boiling with polymeric additives, Int. J. Heat Mass Tran. 13 (1970) 835-848. https://doi.org/10.1016/0017-9310(70)90129-8
  8. J. Zhang, R. Manglik, Nucleate pool boiling of aqueous polymer solutions on a cylindrical heater, J. Non-Newtonian Fluid Mech. 125 (2005) 185-196. https://doi.org/10.1016/j.jnnfm.2004.12.001
  9. L. Cheng, D. Mewes, A. Luke, Boiling phenomena with surfactants and polymeric additives: a state-of-the-art review, Int. J. Heat Mass Tran. 50 (2007) 2744-2771. https://doi.org/10.1016/j.ijheatmasstransfer.2006.11.016
  10. S.M. You, J.H. Kim, K.H. Kim, Effect of nanoparticles on critical heat flux of water in pool boiling heat transfer, Appl. Phys. Lett. 83 (2003) 3374-3376. https://doi.org/10.1063/1.1619206
  11. S.J. Kim, I.C. Bang, J. Buongiorno, L.W. Hu, Surface wettability change during pool boiling of nanofluids and its effect on critical heat flux, Int. J. Heat Mass Tran. 50 (2007) 4105-4116. https://doi.org/10.1016/j.ijheatmasstransfer.2007.02.002
  12. J.S. Coursey, J. Kim, Nanofluid boiling: the effect of surface wettability, Int. J. Heat Fluid Flow 29 (2008) 1577-1585. https://doi.org/10.1016/j.ijheatfluidflow.2008.07.004
  13. S.M. Kwark, R. Kumar, G. Moreno, J. You, S.M. You, Pool boiling characteristics of low concentration nanofluids, Int. J. Heat Mass Tran. 53 (2010) 972-981. https://doi.org/10.1016/j.ijheatmasstransfer.2009.11.018
  14. J. Lee, Y. Jeong, S. Chang, CHF enhancement in flow boiling system with TSP and boric acid solutions under atmospheric pressure, Nucl. Eng. Des. 240 (2010) 3594-3600. https://doi.org/10.1016/j.nucengdes.2010.05.027
  15. S.M. Kwark, M. Amaya, H. Moon, S.M. You, Effect of soluble additives, boric acid (H3BO3) and salt (NaCl), in pool boiling heat transfer, Nuc. Eng. Tech. 43 (2011) 1-10. https://doi.org/10.5516/NET.2011.43.1.001
  16. M. Amaya, S.M. Kwark, A. Gurung, S.M. You, Pool boiling heat transfer of borated(H3BO3) water on a nanoporous surface, J. Heat Tran. 135 (2013) 1-8, 091302.
  17. S. Jun, J. Kim, D. Son, H.Y. Kim, S.M. You, Enhancement of pool boiling heat transfer in water using sintered copper microporous coatings, Nuc. Eng. Tech. 48 (2016) 932-940. https://doi.org/10.1016/j.net.2016.02.018
  18. S. Jun, J. Kim, S.M. You, H.Y. Kim, Effect of heater orientation on pool boiling heat transfer from sintered copper microporous coating in saturated water, Int. J. Heat Mass Tran. 103 (2016) 277-284. https://doi.org/10.1016/j.ijheatmasstransfer.2016.07.030
  19. S. Jun, J. Kim, S.M. You, H.Y. Kim, Effect of subcooling on pool boiling of water from sintered copper microporous coating at different orientations, Sci. Tech. Nuc. Ins. (2018) 1-9.
  20. S.J. Kline, F. McClintock, Describing uncertainties in single-sample experiments, Mech. Eng. 75 (1953) 3-8.
  21. S. Jun, H. Wi, A. Gurung, M. Amaya, S.M. You, Pool boiling heat transfer enhancement of water using brazed copper microporous coatings, J. Heat Tran. 138 (2016) 71502. https://doi.org/10.1115/1.4032988

Cited by

  1. Pool Boiling Performance of Multilayer Micromeshes for Commercial High-Power Cooling vol.12, pp.8, 2020, https://doi.org/10.3390/mi12080980
  2. Boiling heat transfer on the micro-nano structured surface fabricated by mechanical sandblasting/alkali-assisted oxidation vol.183, pp.no.pb, 2020, https://doi.org/10.1016/j.ijheatmasstransfer.2021.122079