Análise teórica do escoamento bifásico em evaporadores cilíndricos via transformada integral

• Ano de defesa: 2003
• Autor(a) principal: Novo, Ediman Dias
• Tipo de documento: Dissertação
• 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: Escoamento Bifásico; Evaporador; Two phase flow; Evaporator; ENGENHARIAS::ENGENHARIA MECANICA
• Link de acesso: https://repositorio.ufpb.br/jspui/handle/tede/5371

In this work we analyze a heat exchanger type cylindrical evaporator usually employed on the domestic refrigerators. The internal flow occurs with a fluid in phase change process. Equations representing the problem under study are the equations of conservation of mass momentum and energy. The tool used to solve these differential equations is the generalized integral transform technique (GITT) produces hybrid solutions for both the hydrodynamic field as for the thermal field. The used model for the evaporator considers it as straight duct and with stratified flow where both phase liquid and vapor can flow with different too. To avoid mathematical complexity of modeling each phase separately is introduced the void fraction concept. The thermal and hydrodynamic fields are studied on the dimensional form and combine as a coupled problem. The thermal field is plotted against enthalpy.