[PDF] Top 20 Experimental and numerical studies of fluidization in a circulating fluidized bed

... Th€ results suggest that (i) the right angle exit and the right angle exit with intemal baffle invoke an upstream exit region ofrcduced solids volume ftaction, (ii) the bend exit yi[r] ... See full document

... liquid-solid circulating fluidized bed (ILSCFB) system was ...liquid-solid fluidization under the conventional fluidization regime was also ...the circulating fluidization ... See full document

... Parametric studies on cluster characteristics such as its size, shape, and solids concentration have been done experimentally with the development of the measuring techniques (Lackermeier et ... See full document

... The numerical results illustrated the effect of the fluidization superficial velocity on the average volume ...the experimental results and CFD predictions. First, the modified fluidized ... See full document

... particle fluidization processes under different conditions, including different properties of solids and fluid, Reynolds number, volume fraction, ...packed bed fluidization regime, such as the Ergun ... See full document

... their experimental comparison was unfortunately based on the same auxiliary liquid velocity, which could lead to different solids circulation rate for different types of particles (Zheng et ... See full document

... limited studies on the hydrodynamics in the riser of the LSCFBs and its overall operation ...conventional fluidization regime, which is considered to be a homogeneous where particles are uniformly spreader ... See full document

... conventional fluidized bed include packed bed, minimum fluidization, bubbling, slugging and finally ...minimum fluidization led to a condition suitably designated as the minimum ... See full document

... years, fluidized bed combustion has been increasingly utilised in the field of combustion of Biomass, sewage sludge and low grade brown coals in order to decrease the emissions and minimising the envi- ... See full document

... An image is the optical representation of an object illuminated by a radiating source. For digital images captured during the whole experiment time period, a critical concern is how to ensure all the experiments are ... See full document

... CFB largely depends on the presentation and analysis of gas-dynamic processes. Their most promising research, taking into account the level of development of modern computer technology, using the methods of ... See full document

... were chosen in an effort to characterize the acceleration zone (0.8 m) and the fully developed zone (1.5, 2.2 and 3.0 m). Radial positions were chosen at the midpoints of eleven equal distributed areas (r/R = 0.0, 0.16, ... See full document

... the bed and Vortex- Circulating bed of the solar dryer is circulating while drying chillies that are present in it, this model can predict the change in the relative humidity of air across the ... See full document

... Since chemical kinetics, heat and mass transfer in fluidi­ zed beds are functions of the flow pattern of both the fluid and the solid a working knowledge of the mechanics of fluidi­ zation should improve design ... See full document

... reactions. Fluidized bed combustors are used worldwide to combust for coal and ...stationary bed of strong particles is brought to a fluidized state by an upward flow of gas as quickly as the quantity ... See full document

... a fluidized bed furnace, CFB reactors pre- sent some interesting features which make more attract- tive than other solid fuel fired boilers (excellent gas-solid and solid-solid mixing, homogeneous ... See full document

... flux, the downflow of the particles in the corrected flow fields is in a much better equi- librium with the upward flow than the uncorrected result. Still, in the downward flow regions a higher velocity is observed than ... See full document

... The model used by [11] was adopted for the simulation of drying process of cassava particulate in a fluidized bed. Preliminary experiments for the determination of the physical and thermal properties of ... See full document

... swirling fluidized bed is an outcome of studies carried out in order to overcome the disadvantages of the conventional fluidized beds ... See full document

... of fluidization velocity on the relative humidity in the outlet chamber shown in ...with fluidization velocity of ...of fluidization velocity 16.4 m/s is faster than the fluidization velocity ... See full document