Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Analysis of the ejector for low-pressure evaporative desalination system using solar energy

태양에너지 이용 저압 증발식 해수 담수시스템 이젝터 CFD 해석

  • Hwang, In-Seon (Solar Thermal Research Center, Korea Institute of Energy Research) ;
  • Joo, Hong-Jin (Dept. of Mechanical Eng., Graduate School, In-Ha University) ;
  • Kwak, Hee-Youl (Solar Thermal Research Center, Korea Institute of Energy Research)
  • 황인선 (한국에너지기술연구원) ;
  • 주홍진 (인하대학교 기계공학과 대학원) ;
  • 곽희열 (한국에너지기술연구원)
  • Received : 2010.09.29
  • Accepted : 2010.12.20
  • Published : 2010.12.30
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Abstract

In this study, the ejector design was modeled using Fluent 6.3 of FVM(Finite Volume Method) CFD(Computational Fluid Dynamics) techniques to resolve the flow dynamics in the ejector. A vacuum system with the ejector has been widely used because of its simple construction and easy maintenance. Ejector is the main part of the desalination system, of which designs determine the efficiency of system. The effects of the ejector was investigated geometry and the operating conditions in the hydraulic characteristics. The ejector consists mainly of a nozzle, suction chamber, mixing tube(throat), diffuser and draft tube. Liquid is supplied to the ejector nozzle, the fast liquid jet produced by the nozzle entrains and the non condensable gas was sucked into the mixing tube. In the present study, the multiphase CFD modeling was carried out to determine the hydrodynamic characteristics of seawater-air ejector. Two-dimensional geometry was considered with the quadrilateral-mashing scheme. The gas suction rate increases with increasing Motive flow circulating rate.

Keywords

References

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