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Study on Cross-flow Heat Transfer in Fixed Bed
Abstract:Radial flow reactor was focused for large scale methanol synthesis and in which the heat transfer type was cross-flow. The effects of operating conditions including the reactor inlet air temperature, the heating pipe temperature and the air flow rate on the cross-flow heat transfer was investigated and the results showed that the temperature profile of the area in front of the heating pipe was slightly affected by all the operating conditions. The main area whose temperature profile was influenced was the area behind the heating pipe. The heat transfer direction according to the air flow directions. In order to provide the basis for radial flow reactor design calculation, the dimensionless number group method was used for data fitting of the bed effective thermal conductivity and the wall heat transfer coefficient which was calculated by the mathematical model with the product of Reynolds number and Prandtl number. The comparison of experimental data and calculated value showed that the calculated value fit the experimental data very well and the formulas could be used for reactor designing calculation.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1329118Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1552
 K. C. Xie, D. Y. Fang, Methnaol technology. Beijing: Chemical Industry Press, 2010.
 X. N. Fan, E. Z. Bai, "Technology development of methanol production and the supply & demand forecast", Chemical Catalyst and Methanol Technology, no. 3, pp. 14-16, 2006.
 K. C. Xie, W. Y. Ying, Chemicals synthesis from coal. Beijing: Chemical Industry Press, 2010.
 H. F. Ma, W. Y. Ying, D. Y Fang, "Simulation of a combined converter for methanol synthesis", Journal of east China University of Science and Technology, vol. 34, no. 2, pp. 149-153, 2008
 J. M. Wu, H. T. Zhang, W. Y. Ying, D. Y. Fang, "Effective Thermal Conductivity of Fixed Packing Bed of Cobalt-based Catalyst", Chinese Journal of Process Engineering, vol. 10, no. 1, pp. 29-34, 2010.
 O. Krischer, K. Kroll, Die wissenschaftlischen grundlagen der troknungstechnik. Berlin: Gottingen Heiderberg, 1956.
 S. Yagi, D. Kunii, "Studies on effective thermal conductivities in packed beds", AIChE J, vol. 3, pp. 373-381, 1957.
 D. Kunii, J. M. Smith, "Heat transfer characteristics of porous rocks", AIChE J, vol. 6, pp. 71-78, 1960.
 E. U. Schlunder, "Local heat transfer coefficients in film condensation at high prandtl numbers", Chem Ing Tech, vol. 38, pp. 967-979, 1966.
 J. Butt, "Thermal conductivity of porous catalysts", AIChE J, vol. 11, pp. 106-112, 1965.
 D. L. Swift, "The thermal conductivity of spherical metal powders including the effect of an oxide coating", Int J Heat Mass Transfer, vol. 9, pp. 1061-1074, 1966.
 P. Zehner, E. U. Schlunder, "Thermal conductivity of granular material at moderate temperature", Chem Ing Tech, vol. 42, pp. 933-941, 1970.
 R. Krupiczka, "Analysis of thermal conductivity in granular materials", International Chem Eng, vol. 7, no. 1, pp. 122-143, 1967.
 K. Nasr, "An experimental investigation on forced convection heat transfer from a horizontal cylinder embedded in a packed bed", Journal of Heat Transfer, vol. 116, pp. 73-79, 1994.
 K. Nasr´╝îS. Ramadhyani, R. Viskanta, "Numerical studies of forced convection heat transfer from a horizontal cylinder embedded in a packed bed", Int J Heat Mass Transfer, vol. 38, no. 13, pp. 2353-2366,1995.
 R. M. Fand, R. T. Phan, "Combined forced and natural convection heat transfer from a horizontal cylinder embedded in a porous medium", Int J Heat Mass Transfer, vol. 30, no. 7, pp. 1351-1358,1987.