Energy and exergy analyses of solar-assisted fluidized bed drying integrated with biomass furnace
Abstract A hybrid solar-biomass fluidized bed drying system was designed, evaluated and developed. The system was comprised of a fluidized bed, a solar collector, and a biomass furnace. This solar-assisted fluidized bed dryer integrated biomass furnace was used to investigated the drying kinetics of paddy. The average temperature of the air drying were 61 and 78 °C. The paddy's moisture content was dried to 14% from 20% (wet basis) with a mass flow rate of 0.125 kg/s. The performance of the fluidized bed drying system was assessed base on energy and exergy analyses. The specific energy consumption (SEC), solar fractions, biomass fractions, thermal and exergy efficiencies were obtained. The SEC and drying times were lower in hybrid solar-biomass fluidized bed drying system compared to solar dryers. Highlights Experimental studies were carried out using solar-assisted fluidized bed dryer integrated biomass furnace for paddy. The drying rate and performances of this system were evaluated. The drying times and SEC were lower in this system compared to solar dryers. The solar fractions, biomass fractions, thermal and exergy efficiencies were investigated. The exergy efficiency is 48% and 50% for air temperature drying of 61 °C and 78 °C, respectively.
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