Numerical Assessment of Steam Ejector Efficiencies Using CFD

• Type: Article in International Scientific Journal
• Date: 2009

Authors

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

Journal

Title: International Journal of Refrigeration

Vol. 32 No. 6

Pages: 1203-1211

ISSN: 0140-7007

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 123 Citations

ISI Web of Science

Scopus - 140 Citations

INSPEC

COMPENDEX

Scientific classification

FOS: Engineering and technology

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific