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전도성 스퍼터링 탄소전극을 사용한 TCO-less 염료감응형 태양전지의 특성에 관한 연구
주용환,김남훈,박용섭,Joo, Yong Hwan,Kim, Nam-Hoon,Park, Yong Seob 한국전기전자재료학회 2016 전기전자재료학회논문지 Vol.29 No.11
We investigated the characterizations of carbon films fabricated by dual magnetron sputtering under various film thickness for the electrodes in TCO-less DSSC (dye-sensitized solar cells). Carbon films prepared at various conditions were exhibited smooth and uniform surfaces without defects. Also, the rms surface roughness of carbon films was decreased from 2.25 nm to 1.0 nm with the increase of film thickness. The sheet resistance as the electrical properties are improved from $11.2{\times}10^{-3}$ to $2.28{\times}10^{-3}$ with the increase of film thickness. In the results, the performance of TCO-less DSSC critically depended on the film thickness of working electrodes, indicating the conductivity of carbon films.
전철주 및 문자 인식을 이용한 시설물 절대위치 검지 방법
최우용(Woo-Yong Choi),박종국(Jong-Gook Park),이병곤(Byeong-Gon Lee),주용환(Yong-Hwan Joo),한승훈(Seung-Hun Han) 대한전기학회 2016 전기학회논문지 Vol.65 No.4
In this paper, we proposed pole position detection system for providing exact location information to users. The proposed system consists of pole recognition part and pole number recognition part. Above all, exact pole recognition is carried out by PDD(Pole Detection Device). And recognition of pole number is performed by PID(Pole Inspection Device). Acquired image by using line scan camera is judged whether it is free bracket or not through image processing. When it is judged as free bracket, pole number image is acquired by OCR camera and recognized by OCR. By recognizing pole number, exact location information is provided to user.
극초단파 부분방전 검출장치를 통한 가스절연개폐장치 유지보수 연구
문기선 ( Ki Sun Moon ),주용환 ( Yong Hwan Joo ) 조선대학교 공학기술연구원 2016 공학기술논문지 Vol.9 No.3
Gas insulated switchgear (GIS) was replaced with indoor, compact, and closed-terminal types in accordance with emphasis on maintenance, safety and facilitation. There is a drawback of the long duration in the accident-restoration caused by the impossibility of verification for the fault section within easy range of a technician in the existing GIS facility. Therefore, the partial discharge (PD) measurement techniques were used in the applied voltage state. In this study, the criterion point of PD detector for GIS was obtained by verifying the huge amount of data in the installed and operated systems under Korea Railroad corporation. The criterion point for the judgment on existence/absence of the PD occurrence in GIS was determined with realignment of criterion value through the reflection of the corresponding warning number by detecting pC and PPS values of the ultra high frequency sensor in abnormality and the adjacent sensor. As a result, the scientific and systematic judgment of criterion in the maintenance was secured not only to decrease in economic losses by use-suspension of the operating equipments but also to prevent the accidents by the PD in advance.
김원식 ( Won Sik Kim ),우남섭 ( Nam Sub Woo ),박종명 ( Jong Myung Park ),김현도 ( Hyun Do Kim ),강동효 ( Dong Hyo Kang ),박인석 ( In Seok Park ),김영준 ( Young Jun Kim ),주용환 ( Yong Hwan Joo ),이호영 ( Ho Young Lee ) 한국지구물리·물리탐사학회 2014 지구물리와 물리탐사 Vol.17 No.1
해양 오일-가스 개발을 위한 플랜트 산업은 많은 장비들을 설계 및 배치하고 운영해야 하는 산업이며, 최근 동향을 보면 생산설비가 해저면(Subsea)쪽으로 증대되고 있다. 해양이라는 특성상 한번 설치되면 변경하기가 용이하지가 않으므로 기본 설계단계에서부터 적절한 시추정 개수, 위치 및 심도, 생산관 직경, 생산 시 관막힘 또는 손상 등의 생산 및 운영과 직접 관련된 정보뿐 아니라 해저에 설치되는 장비들의 안정성과 효과적인 생산운영을 위한 배치에 대한 고려가 필요하다. 이러한 정보들을 근본적으로 제공하기 위한 기법으로 해양탐사를 본 해설에서 다루고자 한다. 먼저 해양 오일-가스 개발을 위한 플랜트장비들을 요약하고, 오일-가스 해양플랜트 설계 및 설치 단계에서 해양탐사가 담당하는 역할을 요약하였다. 그리고 해외사례를 통하여 독자의 이해도를 높이고자 하였다. 해양 오일-가스 플랜트에 적용될 수 있는 해양 탐사기법에 대한 이해와 향후 이 분야에 필요한 국내 해양탐사기술 개발에 도움이 되고자 한다. Because offshore plant industry needs to design, deploy and operate much of equipment especially, the latest trend shows the installation of production facilities is augmented in the subsea. The installed facilities are very difficult to be repaired or changed because they are located in the subsea. For solving these problems, both the directly related information of the production like the optimal number, position and depth of wells and the distribution for effective operation and safety of equipment of subsea should be considered at the preliminary stage of FEED (Front End Engineering Design). The marine exploration is introduced in this paper for providing the fundamental technology to answer the questions related to above considering points. First, some kinds of the offshore plant facilities are enumerated and aims of marine exploration for the offshore oil/gas development are summarized. In addition to it, the main roles of marine survey, in the step of designing and installing offshore oil-gas plant, development are briefly listed. And then foreign examples are shown to help the reader`s understand. This paper is hoped to be helpful for understanding the marine exploration that can be applied to offshore oil/gas plant and to be contributed to developing the domestic techniques in this field for the future.
주용환,조규대 한국환경과학회 1998 한국환경과학회지 Vol.7 No.1
Surface heat budget of the Deukryang Bay from July 1, 1992 to September 12, 1993 is analyzed by using the meteorological data (by Changhung Observatory and Mokpo Meteorological Station) and oceanographical data (by Research Center for Ocean Industrial Development, Pukyong National University). Each flux element at the sea surface which has annual variation is derived with application of an aerodynamical bulk method and empirical formulae. The solar radiation is the maximum in spring and summer, and the minimum in autumn and winter. The effective back radiation, the latent heat and the sensible heat are the maximum in autumn and winter, and minimum in summer. The heat storage rate is calculated by using the rate of water temperature variation according to the depth. The oceanic transport heat is estimated as a residual. The net heat flux, the heat storage rate are positive in spring and summer, while they are negative in autumn and winter. The oceanic transport heat is convergence in winter and divergence in the rest of seasons.