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COMPUTATIONAL STUDY FOR PERFORMANCE EVALUATION OF FLOW CHANNELS INSIDE CDI UNIT CELL  

Sohn, D.Y. (아주대학교 대학원 기계공학과)
Choi, Y.H. (아주대학교 기계공학부)
Park, D.W. (삼성전자 DMC 연구소)
Jung, C.H. (삼성전자 종합기술원)
Publication Information
Journal of computational fluids engineering / v.15, no.1, 2010 , pp. 31-36 More about this Journal
Abstract
In the present study, computations for flow fields inside the CDI unit cells with electrodes and spacers have been made to evaluate their performance. Three types of unit cells that include a planar type, a serpentine channel type, and a spiral wound type were considered and their flow characteristics were compared. From the computational results, it is found that the serpentine channel type has a large flow resistance and can not guarantee the outflow flux for industrial applications. On the other hand, the planar type can sustain a large enough outflow flux but it's efficiency is low for the electrode-use because of the non-uniform velocity distribution inside the cell and dead zones in every corner. Finally, The spiral wound type has not only a large outflow flux as much as the planar type has, but also a high efficiency for the electrode-use because of uniform velocity distribution. From this comparison, we can expect that the spiral wound type of CDI unit cell would have a high performance deionization capability.
Keywords
Capacitive Deionization; Flow Characteristics; CFD; Porous Electrode;
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1 2005, 전상훈, "탄소나노물질을 이용한 CDI 공정 모사," 석사학위논문, 아주 대학교, 수원.
2 2004, 손정식, "전기이중층 모델을 이용한 이온의 전기흡착 거동 해석," 석사학위논문, 전남 대학교, 전남.
3 1997, Farmer, J.C., Bahowick, S.M., Harrar, J.E., Fix, D.V., Martinelli, R.E., Vu, A.K. and Caroll, K.L., "Electrosorption of Chromium Ions on Carbon Aerogel Electrodes as a Means of Remediating Ground Water," Energy and Fuels, Vol.11-2, pp.337-347.
4 1996, Farmer, J.C. and Joseph, C., "Capacitive Deionization of NaCl and NaNO3 Solutions with Carbon Aerogel Electrodes," J. Apple. Electrochemistry, Vol.143-1, pp.159-169.
5 1996, Farmer, J.C., Fix, D.V., Mack, G.V., Pekala, R.W. and Poco, J.F., "Capacitive Deionization of $NH_4ClO_4$Solutions with Carbon Aerogel Electrodes," J. Apple. Electrochemistry, Vol.26-10, pp.1007-1018.