Experimental Investigation on Heat Transfer in a Gas-Solid Fluidized Bed with a Bundle of Heat Exchanging Tubes

An experimental investigation was carried out in mimicked Fischer-Tropsch fluidized bed reactor with vertical heat exchanging tubes. heat transfer to quantify the heat transfer exchanging of heat a better quantification and understanding of the heat transfer in this reactor, an advanced heat transfer technique has been used in this study to quantify the impact of the presence of the cooling tubes on the local heat transfer coefficient at four radial positions (r/R = +/- 0.58, +/- 0.03) at an axial height of H/D =15 cm from the distributor plate with a wide range of superficial gas velocities (0.2-0.48). It has been found that the local heat transfer coefficient in the fluidized bed reactor equipped with a bundle of vertical tubes increases significantly as superficial gas velocity increases at the wall region, while different behavior was noticed at the center of the reactor. Moreover, the results show that the local heat transfer significantly decreases at the reactor's core region for all studied superficial gas velocities. Furthermore, the new tube arrangement offers a uniform local heat transfer profile for all studied operating conditions. The obtained new high-quality experimental data for the local heat transfer coefficient in a fluidized bed reactor equipped with a bundle of tubes can be used for validation CFD simulations, developing mathematical models, facilitating design, scale-up, and operation of this reactor .