Análise da transferência simultânea de calor e massa nos processos de absorção de vapor em soluções binárias via GITT

• Ano de defesa: 2010
• Autor(a) principal: Silva, Frank Werley Xavier da
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal da Paraí­ba; BR; Engenharia Mecânica; Programa de Pós-Graduação em Engenharia Mecânica; UFPB
• Palavras-chave em Português: Refrigeração por absorção; Problemas de difusão acoplados na interface; Transferência simultânea de calor e massa; Absorption refrigeration; Interface coupled diffusion problems; Simultaneous heat and mass transfer; ENGENHARIAS::ENGENHARIA MECANICA
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/tede/5424

The simultaneous heat and mass transfer phenomenon presents on the absorbers of the absorption refrigeration machine was studied by Generalized Integral Transform Technique GITT, for three practical interest cases with growing degree of difficulty in your mathematical formulation. The two first occur over an inclined flat plane with laminar flow regime. It is considered the fully developed flow and obtained the explicit velocity profile with constant thickness film. The adiabatic and isothermal wall is analyzed. The third case, that represent a real condition of operation occur over external surface of a single tube. It models the falling film on a tube where the thickness of the film varies along the perimeter. The phenomenon studied, classified like diffusion problem coupled, presents a strong couplement on the liquid-vapor interface and so, the energy and concentration equations are simultaneously solved. The solutions are obtained from two auxiliary eigenvalues problems for concentration and energy problems. Following the GITT formalism, a hybrid analyticnumerical solution to the potentials is described. Results of practical interest are found such as Sherwood and Nusselt numbers, mass flux in the interface and average potentials.