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Transferência de calor no interior do tubo de um sistema de energia solar de calha parabólica
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ISBN10: 6209507158
ISBN13: 9786209507151
Publisher: Edicoes Nosso Conhecimento
Published: Jan 24 2026
Pages: 68
Weight: 0.23
Height: 0.16 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786209507151
Publisher: Edicoes Nosso Conhecimento
Published: Jan 24 2026
Pages: 68
Weight: 0.23
Height: 0.16 Width: 6.00 Depth: 9.00
Language: Portuguese
Atualmente, as tecnologias de geração de eletricidade através de conversões de energia térmica tornaram-se uma forte procura; um investimento rentável é a unidade de energia solar concentrada incorporada nos componentes do coletor de calha. O objetivo deste trabalho é apresentar um novo estudo térmico do tubo circular absorvedor/recetor do sistema de colectores solares de calha parabólica para escoamento laminar e turbulento (modelo k-ɛ) de fluidos. Usando o software CFD ANSYS FLUENT, uma simulação numérica bidimensional é realizada no fluxo aprimorado e fluido de transferência de calor do ar no tubo recetor PTC. Em ambos os regimes de fluxo laminar e turbulento, os resultados mostraram melhorias significativas na transferência de calor, velocidade e queda de temperatura também, o padrão de distribuição de temperatura sobre o absorvedor de tubo é exibido e vectores de velocidade, contornos de pressão, contornos de temperatura são analisados. A queda de velocidade aumenta e a queda de pressão diminui com o aumento da distância ao longo do eixo da linha central em direção à linha de saÃda do tubo recetor. É apresentado o efeito do aumento do fluxo de calor na direção da parede do tubo; este provoca um aumento da temperatura da parede (de 350 para 390 K em escoamento laminar e de 310 para 325 K em escoamento turbulento).
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