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조철희(Chul-Hee Jo),임진영(Jin-Young Yim),채광수(Kwang-Su Chae),박노식(Ro-Sik Park) 한국해양공학회 2009 韓國海洋工學會誌 Vol.23 No.1
Several tidal current power plants are being planned and constructed in Korea utilizing the strong tidal currents along the west and south coasts. A tidal current reaches 9.7 m on the west coast; there are few potential regions for tidal current power generation. The construction of a dam to store water can prevent the circulation of water, causing a great enviromental impact on the coast and estuary. The tidal barrage could produce a large amount of power, but it should be carefully considered. The purpose of developing renewable energies is to minimize the environmental impact and to maximize the utilization of clean energy. To produce a great quantity of power, tidal current farms require the placement of numerous units in the ocean. The power generation very depedent on the size of the rotor and the incoming flow velocity. Also, the interactions between devices contribute greatly to the production of power. The efficiency of a power farm is estimated to determine the production rate. This paper introduces 3-D interaction problems between rotating rotors, considering the axial, transverse, and diagonal distances between horizontal axis tidal current devices.
조철희(Jo, Chul-Hee),임진영(Yim, Jin-Young),이강희(Lee, Kang-Hee),송승호(Song, Seung-Ho) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
Tidal current power system is one of ocean renewable energies that can minimize the environmental impact with many advantages compared to other energy sources. Not like others, the produced energy can be precisely predicted without weather conditions and also the operation rate is very high. To convert the current into power, the first device encountered to the incoming flow is the rotor that can transform into rotational energy. The performance of rotor can be determined by various design parameters including numbers of blade, sectional shape, diameter, and etc. The stream lines near the rotating rotor is very complex and the interference effects around the system is also difficult to predict. This paper introduces the experiment of rotor performance and also the effect of design parameter on the performance of HAT rotor by CFD.
조철희(Jo, Chul-Hee),임진영(Yim, Jin-Young),이강희(Lee, Kang-Hee),채광수(Chae, Kwang-Su),노유호(Rho, Yu-Ho),송승호(Song, Seung-Ho) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
여러 해양에너지 중 유체의 빠른 흐름을 이용하는 조류발전은 서해안과 남해안에 적용하기에 적합하며 해양환경의 영향을 최소화 하면서 많은 에너지를 연속적으로 생산할 수 있는 장점이 있다. 조류발전에서 1차적으로 에너지를 변환시키는 로터는 조류발전시스템의 주요한 장치중의 하나로 여러 변수에 의해 그 성능이 결정된다. 블래이드 수, 형상, 단면적, 허브, 직경 등 여러 요소를 고려하여 로터를 설계하며, 설계정보와 실험데이터를 바탕으로 수치모델을 구현하여 실험에서 직접 계측할 수 없는 로터 주변의 유체현상 및 간섭영향 등을 예측할 수 있다. 본 논문에서는 변화하는 유속에 따른 HAT 로터의 시동속도, 회전수를 측정하여 로터 형상과 허브-직경비가 다른 로터의 성능을 고찰하고, 이를 수치모델로 구현하여 로터주변 유동변화를 연구하였다.
조철희(Jo, Chul-Hee),임진영(Yim, Jin-Young),이강희(Lee, Kang-Hee),채광수(Chae, Kwang-Su),노유호(Rho, Yu-Ho),송승호(Song, Seung-Ho) 한국신재생에너지학회 2009 신재생에너지 Vol.5 No.2
Tidal current power system is one of ocean renewable energies that can minimize the environmental impact with many advantages compared to other energy sources. Not like others, the produced energy can be precisely predicted without weather conditions and also the operation rate is very high. To convert the current into power, the first device encountered to the incoming flow is the rotor that can transform into rotational energy. The performance of rotor can be determined by various design parameters including numbers of blade, sectional shape, diameter, and etc. The stream lines near the rotating rotor is very complex and the interference effects around the system is also difficult to predict. The paper introduces the experiment of rotor performance and also the fundamental study on the characteristics of three different rotors and flow near the rotor by CFD.
조철희(Chul-Hee Jo),이강희(Kang-Hee Lee),임진영(Jin-Young Yim),노유호(Yu-Ho Rho) 한국유체기계학회 2009 유체기계 연구개발 발표회 논문집 Vol.2009 No.-
Tidal current power system is the energy converter which converts the kinetic energy of tidal stream into electric energy. The performance of the rotor which initially converts the energy is determined by various design factors and it should be optimized by the ocean environment of the field. Flow direction changes due to rise and fall of the tides, but horizontal axis turbine is very sensitive to direction of flow. To investigate the rotor performance considering the interaction problems with incidence angle of flow, series of experiments have been conducted. The results and findings are summarized in the paper.
조철희(Chul-Hee Jo),박노식(Ro-Sik Park),임진영(Jin-Young Yim),이강희(Kang-Hee Lee) 한국해양공학회 2010 韓國海洋工學會誌 Vol.24 No.4
The use of a tidal-current power system is one source of renewable energy that can minimize the environmental impact of power production and offer many other advantages compared to conventional energy sources. Unlike other energy production approaches, rate of energy production can be precisely predicted and the operational rate is very high. The performance of the rotor, which has a vital role in energy production using tidal currents, is determined by various design factors, and it should be optimized for the specific ocean environment in the field. The horizontal-axis turbine is very sensitive to the direction of flow and flaw direction changes due to rise and fall of the tides. To investigate the performance of the rotor considering the interaction problems with incidence angle of flaw, a series of experiments were conducted, and a 3D CFD model was designed and analyzed by ANSYS CFX. The results and findings are summarized in the paper.
임진영,강인호,이상준 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(계획계)
The purpose of this study is to provide useful information about a Post-Occupancy Evaluation in the Yon-sei University the 1st Engineering Center. The data were collected by surveying 300 students, employees in the Yon-sei University the 1st Engineering Center. This building wokers perceive that improvements of building layouts would enhance creative and environment. The analysis identified that students' satisfaction in learning environment and building layout is strongly correlated with students and wokers' satisfaction in overall learning-place. This study suggests that the space factors such as classroom size, arrangement of hallways, degree of students' satisfaction, degree of bathroom's reform, etc are important for learning-place satisfaction. Finally this study was proposed to empirically examine the presuppositions made in this paper.