Combustion Characterization of Cooking Stove Based on Box–Behnken Response Surface Methodology

In this paper, the effects of the number of fuel additions, pot size and the size of the primary air outlets on the thermal performance and pollutant emission of cooking stoves were investigated, based on which the response surface test was designed and parameter optimization was carried out. The results showed that: the order of the main and secondary factors affecting the thermal efficiency was as follows: B-pot size > C‑primary air ratio > A-fuel additions; the order of the main and secondary factors affecting the SO₂ emission was as follows: B-pot size > A-fuel additions > C-primary air ratio. Through the combination of the highest thermal efficiency and the lowest SO₂ emission factors: when the number of fuel additions is 4 times, the size of the iron pot is 18 cm, and the proportion of the primary air is 63.5%, the thermal efficiency is 31.13%, and the amount of SO₂ released is 6.79 mg. This study provides a reference for the biomass cooking stoves to achieve the purpose of reducing the waste of fuel and reducing the emission of pollutants.