O consumo de energia vem aumentando muito nos últimos anos, principalmente por conta do uso intensivo nas indústrias e também pelo aumento do padrão de vida. Nesse cenário, a matriz energética brasileira é bem diversificada e conta com importante uso de fontes renováveis. No presente trabalho, fez-se uma avaliação técnica e econômica do aproveitamento de energia solar, eólica e daquela proveniente da queima de bagaço de cana, num processo de cogeração. Para isso, foram levados em conta os investimentos necessários e as capacidades de geração de cada uma dessas fontes. O custo específico de geração da energia solar foi de R$0,98/kW∙h, o da eólica igual a R$0,12/kW∙h e aquele da biomassa foi de R$0,27/kW∙h. Esses números sugerem que a geração de energia a partir de fontes renováveis é interessante do ponto de vista econômico.Energy consumption has been increasing a lot recently because of the intensive use of energy in manufacturing processes and due to the modern lifestyle in our society. In this context, Brazilian energy sources are pretty diversified and they are mainly composed by renewable energy. A technical and economical assessment of solar, wind and biomass power generation was carried out in this work. With this aim, capital costs and generation capacities for each energy source were taken into account. Specific costs of solar generation resulted in R$0.98/kW∙h, wind power were equal to R$0.12/kW∙h and biomass power, obtained in a cogeneration process with sugarcane bagasse, resulted in R$0.27/kW∙h. These data suggest that renewable energy is quite interesting from an economical point of view.
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