Effects of rapid heat transfer using a fluidized bed on the heat-treating response of Al-Si-Mg alloys (both unmodified and Sr modified) were investigated. The heating rate in the fluidized bed is greater than in conventional air convective furnaces. Particle size analyses of eutectic Si showed that the high heating rate during fluidized bed solution heat treatment causes faster fragmentation an...

This study aims to model a hybrid power system that can continuously generate by switching between two possible thermal sources: solar radiation and combustion energy from synthesis gases. The comprised receiver, dish, Stirling generator, fluidized-bed gasifier, boiler, water tank. dish was dual-reflection collector used mirrors, namely the main subordinate concentrators, concentrate broad expa...

A model for steam gasification of biomass was developed by applying thermodynamic equilibrium calculations. With this model, the simulation of a decentralized combined heat and power station based on a dual fluidized-bed steam gasifier was carried out. Fuel composition (ultimate analysis and moisture content) and the operating parameters, temperature and amount of gasification agent, were varie...

In this study, it was aimed to control the formation of flow regimes planned be in gasification process on model, and hydrodynamic structure circulating fluidized bed gasifier obtained using MFIX program. For purpose, a model established before pilot scale systems modeling performed by entering system dimensions that were calculated analytically. Because is necessary condition from point view c...

In this study, hydrogen production performances of groundnut shells in a circulating fluidized bed gasifier is evaluated by employing previously developed and validated model. Basically, we simulate gasification system that connected to water-gas shift reactor, for purification with the temperature 1150 K. We find amount gas produced from increases 49.25 kmol 68.83 (per 1000 kg raw shells) when...

Introduction Understanding the jetting phenomena near the gas distributor plate in a fluidized bed is important to gassolids mixing, heat and mass transfer, and erosion on any bed internals, which can all affect the performance of the bed. Moreover, acoustic vibration in a fluidized bed can be used to enhance the fluidization quality of particulate matter. Visualizing the jetting structure usin...

several methods are used to decrease seed drying time and enhance the quality of dried seeds. influidization methods, good aeration occurs during the drying process. in this research, conditioned seedswith 20% d.b. moisture content were dried at 30°, 40°, 50° and 60°c using three bed conditions (fixed,minimum fluidized, fluidized). all experiments were done using a batch-type fluidized bed drye...

In this paper, an innovative power plant, constituted by a gas turbine in combined-cycle fuelled by a synthesis gas (or syngas), produced in a local biomass gasifier, is analyzed. The plant is integrated with an external combustion system, fed by cellulosic biomass, connected to a heat exchanger able to increase the air temperature, as in a regenerative cycle. The combustion products pass throu...

Spirals as internals are utilized to reduce the axial mixing of solids in fluidized beds, by routing the solids flow in a predetermined route or by localizing the solids mixing. The drying kinetics of continuous fluidized bed with and without internals has been compared and modeled using batch drying kinetics and residence time distribution analysis. The batch drying experiments were conducted ...