DESEMPENHO DE NANOFLUIDOS EM TROCADORES DE CALOR COMPACTOS:
SIMULAÇÃO TERMOHIDRÁULICA E VALIDAÇÃO EXPERIMENTAL
DOI:
https://doi.org/10.69609/1516-2893.2026.v32.n2.a4114Palabras clave:
Simulação computacionalResumen
O gerenciamento térmico eficiente é crucial para o desempenho e a sustentabilidade de sistemas automotivos modernos. Este artigo investiga a eficiência de transferência de calor em radiadores veiculares operando com nanofluidos de dióxido de titânio (TiO₂). O objetivo principal é comparar o desempenho térmico de misturas convencionais de água desmineralizada e etilenoglicol (EG) com nanofluidos de TiO₂ em baixas concentrações volumétricas. A metodologia consistiu no desenvolvimento de um modelo de simulação termohidráulica em regime permanente, implementado em ambiente Matlab/Simulink através do método e-NUT, validado por ensaios experimentais em uma bancada de testes equipada com sensores de alta precisão e sistema de aquisição de dados. Os resultados demonstram que a adição de nanopartículas de TiO₂ eleva a condutividade térmica efetiva e os coeficientes convectivos, resultando em um aumento na Unidade de Rejeição de Calor (UHR). Observou-se que o ganho térmico é potencializado em condições de elevada vazão de ar externo. Contudo, a análise também revelou penalizações hidráulicas, com aumento da perda de carga proporcional à concentração de nanopartículas. Conclui-se que os nanofluidos de TiO₂ são promissores para otimizar o dimensionamento de trocadores de calor em veículos a combustão e eletrificados, desde que o projeto equilibre o ganho de eficiência térmica com o incremento na potência de bombeamento.
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Derechos de autor 2026 Fernando Silva de Araújo Porto, Carlos Henrique De Paula Junior , Luiz Carlos Cordeiro Junior, Luís Fernando de Almeida

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