Propose The present study shows the results of the evaluation of the pellets made from two forestry crops and eight agricultural crops in Costa Rica by employing a 50 kW domestic stove. Methods The following variables were evaluated: flame outlet and flue gas temperatures and emissions (CO 2 , CO, NO, NO 2 , NO x and SO 2 ). Results It was found that the pellet consumption varies from 2.5 to 3.4 kg/h, where the former corresponds to Tectona grandis and the latter to the mesocarp oil palm fruit. Flame outlet temperature varied from 400 to 623°C and flue gas temperature varied from 205 to 322°C, where the lowest temperature corresponds to Phyllostachys aurea and the highest to the oil palm residue. T. grandis showed the highest variation in temperature, while Cupressus lusitanica showed the lowest variation. A result that stands out in the measurement of emissions is that the two forestry crops show the lowest values. Conclusions Different type of pellet produces different behaviour in domestic stove. Gynerium sagittatum and C. lusitanica were with greater heat generation and Pennisetum purpureum and T. grandis with the lowest heat generation.
<p>Se presenta la evaluación de la combustión de pellets fabricados con dos cultivos forestales y ocho cultivos agrícolas en Costa Rica utilizando un quemador doméstico de 50 Kw/h. Se evaluó las características de la biomasa, las temperaturas en la salida del quemador y en la chimenea, las emisiones (O2, CO2, CO, NO, NO2, NOx y SO2), las pérdidas de calor y la eficiencia. La temperatura de salida en el quemador varió entre 400 °C y 613 °C y la temperatura en la chimenea estuvo desde los 205 a 322 °C, la temperatura más baja correspondió a Phyllostachys aurea y la mayor al residuo de la palma de aceite. Tectona grandis presentó la mayor variación de la temperatura, mientras que Cupressus lusitanica obtuvo la menor variación. Los dos cultivos forestales presentaron los menores valores de emisiones. En la eficiencia en combustión el mejor cultivo fue Gynerium sagittatum, mientras que las especies forestales presentaron una eficiencia intermedia entre los cultivos analizados.</p>
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