ANÁLISE COMPARATIVA ENTRE VEÍCULOS HÍBRIDOS COM GRAFENO, APLICANDO O MÉTODO SAPEVO H2
Resumo
Desde sua descoberta, em 2004, o grafeno tem adquirido crescente relevância industrial, incluindo aplicações no setor automotivo. No entanto, uma análise de mais de 120 artigos indexados na Scopus entre 2020 e 2024 demonstra que a maioria dos estudos se concentra apenas em propriedades vantajosas específicas e isoladas do grafeno, sem comparar parâmetros semelhantes em diferentes aplicações veiculares. Para suprir essa lacuna, 15 estudos foram selecionados a fim de subsidiar uma avaliação comparativa de veículos híbridos aprimorados com aditivos à base de grafeno. O objetivo foi avaliar o custo de aquisição, o consumo de combustível e o consumo de óleo, utilizando o método de decisão multicritério SAPEVO-H². Modelou-se um cenário hipotético para quatro veículos híbridos com preços entre R$ 120.000,00 e R$ 150.000,00, incorporando 0,1–0,3% de grafeno (em volume) ao líquido de arrefecimento, o que levou a um aumento estimado de 6–8% no calor específico, sob as condições modeladas, e 0,15–0,20% de grafeno (em massa) ao óleo do motor, resultando em redução de 33–39% no coeficiente de atrito. A análise indicou que o desempenho do líquido de arrefecimento apresentou a maior relevância (44,6%), seguido pelo custo de aquisição (33,4%) e pelo desempenho do óleo do motor (22,0%). Dentre as alternativas, o Veículo 1 (R$ 120.000,00) foi identificado como a melhor opção, enquanto o Veículo 4 (R$ 150.000,00) foi o menos favorável.
Biografia do Autor
Escola Politécnica da USP
Department of Industrial Engineering of Fluminense Federal University. Rio de Janeiro – RJ, Brazil.
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