This study aimed to evaluate the energy efficiency, thermal power and amount of volatiles released (CO2, CO and SO2) by three models of wood-metallic cookstoves into single-family residences in the city of Irati / PR, Brazil. All cookstoves had a low average energy efficiency from 2.9% ± 0.3 (stove 1), 2.6% ± 0.5 (stove 2) to 4.6% ± 0.2 (stove 3). The thermal power was 159.3 W ± 14.2 (stove 1), 142.7 W ± 39.2 (stove 2) and 176.5 W ± 21.7 (stove 3). It was observed a high pollutant levels of volatile compounds such as CO 34,9 Nm3/kg ± 3,1; 35,2 Nm3/kg ± 8,6 and 24,5 Nm3/kg ± 2,1; CO2 314,4 Nm3/kg ± 28,3; 316,5 Nm3/kg ± 77,0 and 220,9 Nm3/kg ± 19,0, lastly SO2 0,027 Nm3/kg ±0,0; 0,027 Nm3/kg ± 0,0 and 0,019 Nm3/kg ± 0,0, respectively from first to third stove. The results of the analysis of variance showed that the stove 3 showed to be the most efficient among the models investigated. In general, the obtained data indicate a low energy conversion and a potential health risk to the user due the release of toxic gases, such as carbon monoxide, present in the smoke inside the house’s kitchen.

Autores: Lau, P.C. ; Machado, G. O. ; Horta Nogueira, Luiz A ; Christoforo, A. L. ; Gonçalves, D. ; Lahr, F. A. R..
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