Heat Recirculation Using a Porous Medium for Air Pre-Heating in a Biomass Stove
Keywords:
Heat Recirculation, Preheated-Air, Porous Medium, Biomass StoveAbstract
The purpose of this research is to develop a biomass stove with a heat-recirculating approach that utilized a porous medium material to capture combustion heat and pre-heat the air inlet. Corn cobs were employed as the solid fuel. The combustion chamber of the biomass stove was 40 liters in volume, and the porous medium was made of alumina ceramic balls with an average diameter of 10 mm and a porosity of 41.21 percent. This substance has the ability to pre-heat and premix air, hence increasing the stove's combustion efficiency. The fuel consumption rate was 1.2 kg/h, and the operating time was four hours with a lean-burn ratio of 0.75 for the fuel/air ratio. The power input, power output, percentage of char created, burning rate, and temperature efficiency were determined to be 0.006 kW, 94.98 kW, 38.88 percent, 20 g/min, and 28.28 percent, respectively. In comparison to the conventional biomass stove without porous medium, the new biomass stove efficiently reduces ash by 38.88 percent. This study demonstrated the successes of integrating heat recirculation into a biomass stove to increase efficiency.
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