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Hear Transfer in a High Temperature Fluidized Bed
Korean Journal of Chemical Engineering, March 1999, 16(2), 260-264(5), 10.1007/BF02706846
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Abstract
The heat transfer characteristics between the bed and immersed tube in a high temperature fluidized bed (7.5 cm 1.D.× 70 cm H) were investigated with sand and iron ore particles. The heat transfer coefficients were measured at operating temperatures of 200-600℃ and gas velocities of 1-10 Umf. The bed emissivity measured by the radiation probe was found to be 0.8-0.9. The experimentally obtained radiative heat transfer coefficient was in the range of 30-80 W/m2K for the operating temperature of 400-800℃ and the contribution of radiation to total heat transfer was about 13% and 18% for the operating temperatures of 400℃ and 600℃, respectively.
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Basu P, AIChE Symp. Ser., 74, 187 (1978)
Cho YJ, Kim SD, Han GY, Korean J. Chem. Eng., 13(6), 627 (1996)
Choi JC, Kim YJ, Moon SH, Kim SD, HWAHAK KONGHAK, 23(3), 153 (1985)
Han GY, "Experimental Study of Radiative and Particle Convective Heat Transfer in a Fast Fluidized Beds," Ph.D. Thesis, Lehigh University, Bethlehem, U.S.A. (1992)
Il'Chenko AI, Pikashov VS, Makhorin KE, J. Eng. Phys., 14, 602 (1968)
Jolley LT, Fuel, 28, 114 (1949)
Kharchenko NV, Makhorin KE, Int. Chem. Eng., 4, 650 (1964)
Mathur A, Saxena SC, AIChE J., 33, 1124 (1987)
Ozkaynak FT, Chen JC, Frankfiels TR, "An Experimental Investigation of Radiation Heat Transfer in a High Temperature Fluidized Bed," Proc. 4th Int'l Conf. on Fluidization, Japan (1983)
Sieder EN, Tate CE, Ind. Eng. Chem., 28, 1429 (1936)
Yoshida K, Ueno T, Kunii D, Chem. Eng. Sci., 29, 77 (1974)
