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http://dx.doi.org/10.6110/KJACR.2011.23.3.173

Freezing of Micro-size Water Droplet on Micro Porous Surface  

Park, Chun-Wan (Graduate School, Chonbuk National University)
Lee, Dong-Gyu (Graduate School, Chonbuk National University)
Peck, Jong-Hyeon (Korea Institute of Industrial Technology)
Kang, Chae-Dong (Department of Mechanical Engineering, Chonbuk National University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.23, no.3, 2011 , pp. 173-178 More about this Journal
Abstract
Gas diffusion layer(GDL) in PEMFC performs the discharge of water vapor smoothly. When GDL is revealed to cold environment, the freezing of the water droplet or water net in GDL occurs. The purpose of this work is to observe the cooling and freezing behavior of the water droplet which meets to the microporous surface and air under the various low temperature conditions. GDL was coated with waterproof material, which has three types of coating rate, 0, 40 and 60%. Water droplets in series of sizes on GDL were supercooled, frozen and crystalized orderly by circulating low temperature brine. The process of cooling was investigated with the temperature and the snapshot of the water droplet.
Keywords
Supercooing; Gas Diffusion Layer(GDL); Freezing; PEMFC;
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  • Reference
1 Kraytsberg, A. and Ein-Eli, Y., 2006, PEM FC with improved water management, Journal of Power Sources, Vol. 160, No. 1, pp. 194-201.   DOI   ScienceOn
2 Krishnamurthy, B. and Deepalochania, S., 2009, Effect of PTFE content on the performance of a Direct Methanol fuel cell International J. Hydrogen Energy, Vol. 34, No. 1, pp. 446-452.   DOI   ScienceOn
3 Tang, H., Wanga, S., Pana, M., and Yuana, R., 2007, Porosity-graded micro-porous layers for polymer electrolyte membrane fuel cells, Journal of Power Sources, Vol. 166, No. 1, pp. 41-46.   DOI   ScienceOn
4 Zhang, L., 2008, Model predictive control of water management in PEMFC, J. Power Sources, Vol. 180, No. 1, pp. 322-329.   DOI   ScienceOn
5 Jiao, K. and Li, X., 2010, Cold start analysis of polymer electrolyte membrane fuel cells International journal of hydrogen energy, Vol. 35, No. 10, pp. 5077-5094.   DOI   ScienceOn
6 Urbani, F., Barbera, O., Giacoppo, G., Squadrito, G., and Passalacqua, E., 2008, Effect of operative conditions on a PEFC stack performance International Journal of Hydrogen Energ, Vol. 33, No. 12, pp. 3137-3141.   DOI   ScienceOn
7 Lim, N.-Y., Park, G.-G., Park, J.-S., Yoon, Y.- G., Lee, W.-Y., Lim, T.-W., and Kim, C.-S., 2006, Freeze/Thaw cycle effects on GDLs and MEAs of PEFC, proceedings of KSNRE 2006 Spring Annual Conference, pp. 96-98.
8 Lu, Z., Kandlikar, S. G., Rath, C., Grimm, M., Domigan, W., White, A. D., Hardbarger, M., Owejan, J. P., and Trabold, T. A., Water management studies in PEM fuel cells, Part II：Ex situ investigation of flow maldistribution, pressure drop and two-phase flow pattern in gas channels, International Journal of Hydrogen Energy, Vol. 34, No. 8, pp. 3445-3456.
9 Toray GDL material catalog http://www.torayca.com/properties/en/images/report_eng09_2.html.