태양에너지 이용 저압 증발식 해수 담수시스템 이젝터 CFD 해석
Analysis of the ejector for low-pressure evaporative desalination system using solar energy
0
조회
0
다운로드
4
인용
0
참고문헌
키워드
초록
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.
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.
참고문헌 (9)
- Fluegel, G, "Berechnung von strahlapparaten, VDI Forschungsheft 395 Ausgabe B Band 10", ~ (1939)
- Sun, D.W, "1995 Recent debelopments is the design theories and applications of ejectors-a review", journal of the Institute of Energy, 68, pp.665~679 (1995)
- Witte, J.H, "Efficiency and design of liquid-gas ejector", British chemical engineering, 10(9), pp.602~607 (1965)
- Daltrophe, N.C, "Heat and mass transfer in a jet ejector for absorption system", Int. Absorption Heat Pump Conference ASME, 31, pp.327~332 (1993)
- Mitra, A.K, "Momentum transfer in a jet ejector for absorption system", The Canadian Journal of Chemical Engineering, 50, pp.313~373 (1972)
- Abu-Jabal,M.S, "Proving test for a solar - power desalination system in Gaza - Pales time", Desalination, 137, pp.1~6 (2001)
- T, Utomo, "A CFD Analysis on Hydrodynamics Characteristics of Gas-Liquid Ejector", 한국동력기계 공학회 2006 추계학술대회 논문집, pp.172~176 (2006)
- Drew, D. A, "In particulate Two-Phase Flow" (1993), Butterworth- Heinemann
- G, Kundo, "Experimental studies on a co-currentgas-liquid downflow bubble column", Multiphase flow, 21(5) (1995)