HEAT-TRANSFER IN A PRESSURIZED CIRCULATING FLUIDIZED-BED

Bed-to-wall heat transfer in a pressurized circulating fluidized bed i s analyzed. The cluster renewal model is modified to account for the e ffect of pressure on heat transfer. Bed-to-wall heat transfer coeffici ents at different operating pressures were measured. The effects of sy stem pressure, bed suspension density, particle size and superficial g as velocity were investigated in the tests. In addition to the modifie d model, a semi-empirical equation based on the lest data is proposed for the prediction of heat transfer coefficients. A comparison with ex perimental data in the literature, as well as those from the present w ork, shows a good agreement. Copyright (C) 1996 Elsevier Science Ltd.