Effect of Injected Air Flow Ratio on Combustion Characteristics in a Bench-Scale Biomass-Fired Furnace; [탁상형 바이오매스 연소로의 연소 특성에 대한 주입 공기 흐름 비율의 영향]

Abstract

Sugarcane bagasse is gaining attention as a potential solution to the ongoing climate crisis. Due to various constraints limiting power generation facility experimentation, numerical analysis can aid in predicting physical phenomena. In this study, the internal flow and combustion characteristics of a cyclone-based biomass combustion furnace, with four combustion chambers, are examined using numerical analysis on a bench-scale model. The injected air flow ratio for each combustion chamber serves as a variable. Differences in flame size, temperature, chemical species, and particle trajectory, resulting from swirl and rising airflow generated by injected air, were analyzed. With respect to the four model cases, CO levels decreased by up to 19.75, while CO2 levels increased by up to 13.17 based on case 4. The findings suggest that various factors, such as combustibility and environmental impact, should be considered when designing a furnace. © 2023 The Korean Society of Mechanical Engineers.