CFD simulation of two-phase ejector performance influenced by different operation conditions

Ping Zheng, Bing Li and Jingxuan Qin

Energy, 2018, vol. 155, issue C, 1129-1145

Abstract: In this paper, the influence of temperature phase change on two-phase ejector is investigated by the computational fluid dynamics (CFD) technique. The working fluids used in this research are LNG as primary fluid and BOG as secondary fluid. The transient behavior in the two-phase ejector is simulated to find the optimal operation conditions for higher ejector performance. The axial velocity, pressure and temperature, entrainment ratio, heating coefficient, volume fractions of gas and liquid are obtained under different operation conditions. The predicted values by CFD simulation prove to be in good agreement with on-site test data. Phase change has a significant effect on the performance of LNG-BOG ejector. The results show that entrainment ratio increases with increasing LNG inlet velocity and decreasing mixture outlet pressure. Too high BOG inlet and mixture outlet pressure can result in abnormal ejection. For the specific two-phase ejector described in this paper, the optimal ejection performance is obtained under the conditions with LNG inlet velocity of 11–12 m/s, BOG inlet pressure of 0.101–0.507 MPa and mixture outlet pressure of 0.101–0.304 MPa. This study may provide a beneficial reference for good performance of LNG-BOG ejector and may be helpful for further applications in LNG transportation.

Keywords: Two-phase ejector; Temperature phase change; Entrainment ratio; Transient; CFD; Operation conditions (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S036054421830673X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:155:y:2018:i:c:p:1129-1145

DOI: 10.1016/j.energy.2018.04.066

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().