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CFD해석에 의한 마이크로 횡류수차의 속도와 압력 분포
임재익(Jae ik Lim),최영도(Young do Choi),최민선(Min seon Choi),김유택(You taek Kim),이영호(Young ho Lee) 한국유체기계학회 2007 유체기계 연구개발 발표회 논문집 Vol.- No.-
The renewable energy is necessary to develop as a countermeasure of greenhouse effect. Among the renewable energy resources, small hydropower generates few CO₂ and energy density of the small hydropower is relatively higher than that of the other renewable energy resources. Recently, development of hydroelectric power system in our country is mainly focused on the improvement of performance of the turbine-generator and also, standardization of the turbine is very important. Because of the structural feature of cross-flow turbine, standardization of the turbine is easy. The purpose of this study is to examine the optimum configuration of main variables to further optimize the cross-flow hydraulic turbine structure and to improve the performance. The turbine has been proved that the output power varies by the turbine design factors such as nozzle shape, runner blade angle and the number of the runner blade.
밸러스트 여과기용 hydrocyclone 형상 변화에 따른 분리 성능비교에 관한 연구
임재익(Jae-Ik Lim),배기화(Gi-Hwa Bae),유찬욱(Chan-Uk Ruy),황태규(Tae-Gyu Hwang) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
10 billion ton ballast water is moved, and is irradiated that creature more than 7000 kind moves along ballast's water worldwide every year. These most die in new environment, but survived creatures disturb ecosystem that is flowed in newly strong viability and ability to breed or are destroyed. Because IMO completes international agreement for ballast water of ship and control of deposit and administration, IMO is getting now confirmation of every country. Advantage of hydrocyclone is simple rescue and excellent separation performance. In this study, shape wishes to forecast result by change using CFD to save most suitable shape that is correct in the capacity for filtration of ballast water.
밸러스트 여과기용 hydrocyclone 형상 변화에 따른 분리 성능 비교에 관한 연구
임재익(Jae-Ik Lim),배기화(Gi-Hwa Bae),유찬욱(Chan-Uk Ruy),황태규(Tae-Gyu Hwang) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
10 billion ton ballast water is moved, and is irradiated that creature more than 7000 kind moves along ballast's water worldwide every year. These most die in new environment, but survived creatures disturb ecosystem that is flowed in newly strong viability and ability to breed or are destroyed. Because IMO completes international agreement for ballast water of ship and control of deposit and administration, IMO is getting now confirmation of every country. Advantage of hydrocyclone is simple rescue and excellent separation performance. In this study, shape wishes to forecast result by change using CFD to save most suitable shape that is correct in the capacity for filtration of ballast water.
합금 극세사 필터 엘리멘트 세정을 위한 세정조 내부유동 특성 연구
임재익(Lim Jae-Ik),유찬욱(Ryu Chan-Uk),박재현(Park Jea-Hyoun),최주형(Choi Joo-Hyoung),김정환(Kim Jeong-Hwan) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.10
The microfiber filter continued using filter's efficiency is degraded. The continued use of filters to remove contaminants through a cleaning. In this study a wash trough fluids flow inside the inlet for the efficient mixing of the location were investigated. The inlet and outlet of the Wash trough internal filter change intervals depending on the position of the flow analysis was performed.
유효낙차에 따른 80kW급 횡류수차의 성능 및 내부유동 해석
최영도,임재익,이영호,Choi, Young-Do,Lim, Jae-Ik,Lee, Young-Ho 한국마린엔지니어링학회 2010 한국마린엔지니어링학회지 Vol.34 No.5
Recently, small hydropower attracts attention because of its clean, renewable and abundant energy resources to develop. However, suitable turbine type is not determined yet in the range of small hydropower and it is necessary to study for the effective turbine type. Therefore, a 80kW-Class cross-flow turbine is adopted in this study because of its simple structure and high possibility of applying to small hydropower. The result shows that as effective head increases, tangential and radial flow velocities increase and thus, the increased tangential velocity contributes to the increase of angular momentum and output torque. 최근 신재생에너지 연구개발과 관련하여 소수력발전에 대한 관심이 높아지고 있지만, 기존의 대수력용 수차 시스템과는 달리 소수력에 적당한 수차의 설계법이 아직 확립되어 있지 않기 때문에 고성능의 소수력용 수차의 개발이 요구되고 있다. 그러나, 복잡한 터빈의 구조에 의한 상대적으로 높은 제작단가는 소수력발전용 터빈의 개발에 큰 걸림돌로 작용하고 있다. 따라서, 본 연구에서는 수차의 형상이 상대적으로 간단하고 소수력자원에 적용하기가 용이한 80kW급 횡류형 수차에 대하여 유효낙차 변화에 따른 성능 및 내부유동에 대해서 검토하였다. 유효낙차가 증가함에 따라서 원주방향 및 반경방향 속도비가 증가하게 되며, 증가한 원주속도에 의해 각운동량이 증가하여 출력도 커지게 된다.