Exergetic Evaluation of Fluidized Bed for Different BiomassWaste Inceneration

Bubbling fluidized bed gasifiers (BFG) has potential for rural electrification projects especially in third world countries where biomass supplies are abundant from agricultural, wood industries and where electricity supply from the grid is not available. An equilibrium model is developed for biomass waste gasification in bubbling fluidized bed gasification. Exergetic analysis of a bubbling fluidized bed gasifier (BFG) for incineration of different biomass wastes has been performed and the influences of moisture content of the fuel and gasifying relative fuel/air ratio and the gasifier temperature on the producer gas composition and properties of the process has been investigated. It is shown that higher moisture will decrease the product gas higher beating value and gasifier cold gas efficiency while increase the exergetic efficiency and increase in temperature and gasifying air/fuel ratio will increase the exergetic efficiency. The model shows good a greement with the experimental results.

Keywords:

Exergetic analysis , Fluidized bed gasification , biomass wastes