Numerical Assessment of Steam Ejector Efficiencies Using CFD

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Szabolcs Varga (Autor) FEUP; Armando C. Oliveira (Autor) FEUP; Bogdan Diaconu (Autor) FEUP

Revista

Título: International Journal of Refrigeration

Vol. 32 Nº 6

Páginas: 1203-1211

ISSN: 0140-7007

Editora: Elsevier

Indexação

ISI Web of Knowledge - 123 Citações

ISI Web of Science

Scopus - 140 Citações

INSPEC

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-003-G6X

DOI: 10.1016/j.ijrefrig.2009.01.007

Abstract (EN): Ejector efficiencies for the primary nozzle, suction, mixing and diffuser were determined for the first time, according to their definitions, using an axi-symmetric CFD model. Water was considered as working fluid and the operating conditions were selected in a range that would be suitable for an air-conditioner powered by solar thermal energy. Ejector performance was estimated for different nozzle throat to constant section area ratios. The results indicated the existence of an optimal ratio, depending on operating conditions. Ejector efficiencies were calculated for different operating conditions. It was found that while nozzle efficiency can be considered as constant, the efficiencies related to the suction, mixing and diffuser sections of the ejector depend on operating conditions.

Idioma: Inglês

Tipo (Avaliação Docente): Científica