COMPARATIVE STUDY OF THE PERFORMANCE OF A VARIABLE AREA RATIO STEAM EJECTOR

• Type: Article in International Conference Proceedings Book
• Date: 2012

Authors

Szabolcs Varga (Author) FEUP; Armando C. Oliveira (Author) FEUP; Ma, XL (Author) Other; Omer, SA (Author) Other; Zhang, W (Author) Other; Riffat, SB (Author) Other

Conference proceedings International

Title: ICEM15: 15TH INTERNATIONAL CONFERENCE ON EXPERIMENTAL MECHANICS

Pages: 119-124

15th International Conference on Experimental Mechanics (ICEM)

Porto, PORTUGAL, JUL 22-27, 2012

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 10 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-005-K72

DOI: 10.1093/ijlct/ctq048

Abstract (EN): In the present paper, experimental results for a 5 kW capacity steam ejector with variable primary nozzle geometry are presented and compared to numerical simulations. The variable geometry was achieved by applying a movable spindle in the primary nozzle. Operating conditions were considered in a range that would be suitable for an air-conditioning application, with thermal energy supplied by vacuum tube solar collectors. The numerical results were obtained using CFD. The experimental entrainment ratio varied in the range of 0.1 to 0.5 depending on operating conditions and spindle tip position. It was found that the primary flow rate can be successfully adjusted by the spindle. CFD and experimental primary flow rates agreed well, with an average relative error of 7.7%. CFD predicted the secondary flow rate and entrainment ratio with good accuracy only in 70% of the cases.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13