Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
권호 표지
DOI QR코드

DOI QR Code

Study on the Behaivor of Bubbles in Array Type Flow Channels

균일형 유로에서 기포의 거동에 관한 연구

  • Jung, Youngguan (Department of Mechanical Engineering, Kumoh National Institute of Technology)
  • 정영관 (금오공과대학교 기계공학과)
  • Received : 2013.02.01
  • Accepted : 2013.02.28
  • Published : 2013.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

The hydrogen or oxygen gas producted by electrolysis become many bubbles in the electrolyte, but exact data on the behavior of these bubbles in the separator of an electrolysis stack didn't become known. In this study, the flow visualization experiment on the behavior of bubbles in the flow pattern of the array type separator is performed by using of a visible alkaline electrolysis stack and a stereoscopic microscope. As the results, a fine size bubbles adhered to the surface of the flow pattern grow to large sized bubbles until each bubble's buoyance is lager than the sum of external force and weight. And then the large bubbles flow into the upper area of the separator. Bubbles adhered to the surface of the vertical flow pattern grow quickly than them adhered to the surface of the horizontal flow pattern. Also, he electrolysis efficiency is declined because many multi-size bubbles occupied the wide volume in the flow pattern.

Keywords

References

  1. M. D. Mat, K. Aldas, "Application of a two-phase flow model for natural convection in an electrochemical cell", Int. Journal of Hydrogen Energy, Vol. 30, 2005, p. 411-420. https://doi.org/10.1016/j.ijhydene.2004.04.002
  2. P. Mandin, A. A. Aissa, H. Roustan, J. Hamburger, G. Picard, "Two-phase electrolysis process: From the bubble to the electrochemical cell properties", Chemical Engineering and Processing, Vol. 47, 2008, p. 1926-1932. https://doi.org/10.1016/j.cep.2007.10.018
  3. H. Matsushima, Y. Fukunaka, K. Kuribayashi, "Water electrolysis under microgravity, Part II. Description of gas bubble evolution phenomena", Electrochimica Acta, Vol. 51, 2006, p. 4190-4198. https://doi.org/10.1016/j.electacta.2005.11.046
  4. H. S. CHOI, D. S. YiM, C. H. RHYU, J. C. KiM, G. J. HWANG, "Study on the electrode characteristics for the alkaline water electrolysis", Trans. of the Korean Society of Hydrogen and New Energy Society, Vol. 23, No. 2, 2012, p. 15. https://doi.org/10.7316/KHNES.2012.23.2.117
  5. Y. G. JUNG. S. W. KIM, K. H. KIM, S. D. CHOI, T. I. JANG, C. M. WHANG, "SA study on the hydrogen supply for variation in output from a metal hydride canister", Trans. of the Korean Society of Hydrogen and New Energy Society, Vol. 20, No. 3, 2009, p. 218-223.
  6. H. H. JO, S. H. LEE, B. J. JANG, J. Y. SONG, "A study on the bipolar plate of electrolytic cell of hydrogen gas generation system by numerical system", J. of the Korean Oil Chemists' Soc., Vol. 27, No. 1, 2010, p. 61-68.
  7. H. H. JO, B. J. JANG, J. Y. SONG, "A study on the channel design of bipolar plate of electrolytic cell by flow dynamic simulation in the two phase flow system", J. of the Korean Oil Chemists' Soc., Vol. 27, No. 4, 2010, p. 415-420.
  8. K. Aldas, "Application of a two-phase flow model for hydrogen evolution in an electrochemical cell", Applied Mathematatics and Computation, Vol. 154, 2004, p. 507-519. https://doi.org/10.1016/S0096-3003(03)00731-8
  9. H. Matsushima, T. Nishida, Y. Konishi, Y. Fukunaka, Y. Ito, K. Kuribayashi, "Water electrolysis under microgravity, Part 1. Experimental technique", Electrochimica Acta, Vol. 47, 2008, p. 1926-1932.
  10. C. RYU, J. KIM, D. PARK, Y JUNG, "Study on the Behavior of bubbles in the Srparator", Trans. of the Korean Society of Hydrogen and New Energy Society, Vol. 23, No. 5, 2009, p. 538-544.