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Transferência de calor no interior do tubo de um sistema de energia solar de calha parabólica by Marwa Ibrahim

Transferência de calor no interior do tubo de um sistema de energia solar de calha parabólica

by Marwa Ibrahim
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Book cover type: Paperback
  • ISBN13: 9786209507151
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Edicoes Nosso Conhecimento
  • Publisher Imprint: Edicoes Nosso Conhecimento
  • Publication Date:
  • Pages: 68
  • Original Price: GBP 38.19
  • Language: Portuguese
  • Edition: N/A
  • Item Weight: 105 grams
  • BISAC Subject(s): Electrical

Atualmente, as tecnologias de gera��o de eletricidade atrav�s de convers�es de energia t�rmica tornaram-se uma forte procura; um investimento rent�vel � a unidade de energia solar concentrada incorporada nos componentes do coletor de calha. O objetivo deste trabalho � apresentar um novo estudo t�rmico do tubo circular absorvedor/recetor do sistema de colectores solares de calha parab�lica para escoamento laminar e turbulento (modelo k-ɛ) de fluidos. Usando o software CFD ANSYS FLUENT, uma simula��o num�rica bidimensional � realizada no fluxo aprimorado e fluido de transfer�ncia de calor do ar no tubo recetor PTC. Em ambos os regimes de fluxo laminar e turbulento, os resultados mostraram melhorias significativas na transfer�ncia de calor, velocidade e queda de temperatura tamb�m, o padr�o de distribui��o de temperatura sobre o absorvedor de tubo � exibido e vectores de velocidade, contornos de press�o, contornos de temperatura s�o analisados. A queda de velocidade aumenta e a queda de press�o diminui com o aumento da dist�ncia ao longo do eixo da linha central em dire��o � linha de sa�da do tubo recetor. � apresentado o efeito do aumento do fluxo de calor na dire��o 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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