Abstract
Combustion of biomass, including charcoal releases harmful pollutants that not merely contribute to household and outdoor air pollution, particularly in rural regions, but also imposes significant risks on human health. Due to the rising concerns on the increasing severity of environmental pollution, some countries have established benchmarks on pollutant emissions based on governmental health guidelines. In this paper, a numerical study of thermal performance and emissions was performed in a digital charcoal stove model using the commercial software ANSYS Fluent 2024 R1. The main objective of this study is to comprehend the effect of the variation of air inlet velocity on determining the optimum operating conditions. A 2D digital charcoal stove was constructed and non-premixed combustion model was employed for simulating the data. Variation of the amount of emissions was performed by changing the velocity of air inlet, (0.02-0.045m/s) while maintaining a constant fuel inlet velocity of 0.04m/s, under air and fuel temperatures (300 and 400K). The results showed a decreasing trend in maximum mass fraction of CO 2with increasing air inlet velocity up to 0.045m/s, then remained stable. Additionally, at an air inlet velocity of 0.02m/s, the stove achieved a maximum temperature of 1820K and the lowest CO/ CO 2ratio, showing that this condition is optimal as it provided the highest combustion efficiency.
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