The Effect of Flat Heater Inclination on the Heat Transfer Coefficient in Gas-Fluidized Beds

摘要

In this paper the effect of the orientation of a flat heater on the heat transfer coefficient in a gas- solid fluidized bed was experimentally investigated. The effect of the rectangular heater and the gas flow was examined by changing the angle from 0 to 180, and its connection with the effect of the hydrodynamic parameters. The experimental results were conducted at ambient temperatures in a Plexiglas Coleman of 142 mm I.D. and the heater used was made of copper and electrically heated by a constant power of 6w. The heater position was at constant height in the column but its radial position was changed. Oil shale particles of different size were used as the solid phase in the fluidized bed. The velocity of air was changed in the range from 0.035 m/s to 1.8 m/s. The results obtained were discussed and compared with other previous studies. This study aids in gaining a better understanding of heat transfer mechanism which is sufficient to designing and operating the fluidized bed reactors properly.