Desenvolvimento de um secador solar de leito fixo: estudo experimental e simulação CFD

Autores

DOI:

https://doi.org/10.33448/rsd-v9i3.2667

Palavras-chave:

Secagem solar; Sustentabilidade; Moringa oleífera; Folhas; Soja.

Resumo

Diante do desafio de desenvolver secadores solares mais eficientes, a técnica de Fluidodinâmica Computacional (CFD) foi aplicada neste trabalho para testar diferentes configurações de entrada de ar em um secador solar de leito fixo, com entradas laterais. Por meio das simulações, foi determinada a melhor configuração de alimentação de ar que favoreceu o contato entre partículas. Foi construído um secador solar de leito fixo, no qual se realizou experimentos com sementes de soja e folhas de Moringa oleífera LAM. Duas configurações de alimentação de ar no secador foram testadas: entradas totalmente abertas e parcialmente abertas. Os resultados de CFD mostraram que a vazão de ar foi mais pronunciada no topo do leito, perto do exaustor, quando a alimentação de ar ocorre por entradas laterais totalmente abertas ao longo do leito. Isso pode explicar os resultados experimentais de secagem, em que os materiais apresentaram uma secagem heterogênea, secando de forma mais eficiente no topo do leito.  De acordo com as simulações, o perfil de velocidade de ar passa a ser mais homogêneo quando o ar é alimentado apenas na base do leito. Assim, a secagem na configuração parcialmente aberta foi mais homogênea, e com taxa de secagem cerca de 300% superior à obtida na condição com entradas totalmente abertas.

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Publicado

27/02/2020

Como Citar

STOPPE, A. C. R.; NETO, J. L. V.; SANTOS, K. G. dos. Desenvolvimento de um secador solar de leito fixo: estudo experimental e simulação CFD. Research, Society and Development, [S. l.], v. 9, n. 3, p. e123932667, 2020. DOI: 10.33448/rsd-v9i3.2667. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/2667. Acesso em: 17 jul. 2024.

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Engenharias