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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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