Numerical investigation on side heat transfer
enhancement in 300 kA aluminum reduction cell
Numerical investigation on side heat transfer
enhancement in 300 kA aluminum reduction cell
WANG Changhong1, ZHU Dongsheng1, LEI Junxi1, ZHOU Jiemin2
1.Educational Ministry Key Laboratory of Enhanced Heat Transfer & Energy Conservation, Chemistry and Chemical Engineering, South China University of Technology; 2.School of Energy Science and Engineering, Central South University;
Abstract：Industrial test and numerical simulation were synchronously applied to analyze the side heat transfer process and enhance heat transfer in aluminum reduction cell. The 3D slice finite element model of aluminum reduction cell was developed, with which the sidewall temperature field of the cell was computed by using software ANSYS. The main influencing factors on heat dissipation were analyzed and some effective measures were proposed to enhance sidewall heat transfer. The results show that the shell temperature of the test cell and the common cell is respectively 312°C and 318°C and the ledge thickness is 16 cm and 15 cm when side coefficient of heat transfer between the shell and the surroundings is 70 W/(m2K). With the increase of the side coefficient of heat transfer between the shell and the surroundings, the temperature of the shell decreases but the thickness of the side ledge increases when the electrolytic temperature, the ambient temperature, the coefficient of heat transfer between molten bath and ledge, the eutectic temperature and the thermo-resistance of the side lining are constant.
出版日期: 2008-09-05
引用本文:
. Numerical investigation on side heat transfer
enhancement in 300 kA aluminum reduction cell[J]. Frontiers of Energy and Power Engineering in China - Selected Publications from Chinese Universities, 2008, 2(3): 256-260.
WANG Changhong, ZHU Dongsheng, LEI Junxi, ZHOU Jiemin. Numerical investigation on side heat transfer
enhancement in 300 kA aluminum reduction cell. Front. Energy, 2008, 2(3): 256-260.
Huo Q F . Aluminum Reduction Technology and Equipment. Shenyang: Liaohai Press, 2002, 23–52
2
Wang C H . Industrial test and numerical simulation of the graphitized cathodelining in the 300 kA prebaked aluminum reduction cells. Dissertation for the Doctoral Degree. Changsha: Central South University, 2006
3
Dupuis M, Bojarevics V, Frebergs J . Demonstration thermo-electric and MHD mathematical modelsof a 500 kA aluminum electrolysis cell: Part 2. Light Metals, 2004, 453–459
4
Dupuis M . Usageof a full 3D transient thermo-electric FE model to study the thermalgradient generated in the lining during a coke preheat. Light Metals, 2001, 757–762
5
Dupuis M, Bojarevics V . Weakly coupled thermo-electricand MHD mathematical models of an aluminum electrolysis cell. Light Metals, 2005, 449–454
6
Tomasino T, Martin C, Waz E, et al.. Numerical modeling of heat transfer around analuminum reduction pot shell. Light Metals, 2004, 433–438
7
Eika K, Skjeggstad R . Heat recovery and dynamicprocess studies. Light Metals, 1993, 277–284
8
Hashimoto T, Ikeuchi H . Computer simulation of dynamicbehavior of an aluminum reduction cell. Light Metals, 1980, 273–280
9
Palsen K A . Variations of lining temperature anode position and current/voltageload in aluminum reduction cells. LightMetals, 1980, 325–341
10
Mei C, Wang Q P . Study on thermal field ofaluminum reduction cell. Light Metals, 1992, 29–32
11
Zhou J M, Li M, Wang C H . Numerical simulation of electro-thermal field in thealuminum electrolysis cell with graphitized cathode. Carbon Techniques, 2007, 26(2): 6–9
12
Li M, Zhou J M, Wang C H . Coupled simulation of multiple physical fields in a 300kA aluminum electrolysis cell. The ChineseJournal of Process Engineering, 2007, 7(2): 354–359
13
Sun H J, Zilkanov O . Non-linear two-dimensionalmodel of melt flows and interface instability in aluminum reductioncells. Fluid Dynamics Research, 2004, 34: 255–274. doi:10.1016/j.fluiddyn.2004.06.003
14
ANSYS Incorporation. . AnsysUser Manual. Beijing: ANSYS Branch Company in CHINA, 2000, 122–147
15
Patankar S V . Numerical Heat Transfer and Fluid Flow. New York: Hemisphere Publishers, 1984, 44–72
