http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
정영석(Jung Young-seok),강기환(Kang Gi-hawn),유권종(Yu Gwon-jong),송진수(Song Jin-soo) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
In recent years, for the viewpoint of environment and electric power demand for stable secure, new energy such as photovoltaic system (PV) become increasingly popular. In case of interconnecting PV to the commercial electric company, two problems will occur when operating in isolation with the other general consumers. One is doing harm to the power quality. And the other is the security problem caused by char ching a part of commercial system line that has to be no voltage. In this paper, a simple modelling of distribution system and grid -connected PV system and simulation result were proposed.<br/> <br/>
윤대식(Yoon Dae-Sik),안영수(Ahn Young-Soo),강기환(Kang Gi-Hawn),장효식(Chang Hyo Sik),이진석(Lee Jin-Seok) 한국태양에너지학회 2022 한국태양에너지학회 논문집 Vol.42 No.3
This paper describes the physical process used to recover silicon from a solar module, where the solar cell recovery rate (87.4 %) was determined under optimized process conditions. This physical recycling method requires a particle separation process because selective separation of the recovered materials is difficult, and the recovery rate and purity of the recovered materials can be low after the initial particle separation. In this study, the recovery rate was determined with respect to the crushing time and rotational speed of the cutter mill as well as the amplitude and separation time of the sieving machine, which were optimized to increase the Si recovery rate. In addition, an etching process was used to recover high-purity Si from the solar cells. To determine whether Ag and Al were removed from the recovered Si, XRD analysis was performed to confirm the measured Si peak and small TiO₂ peak, and ICP-MS analysis was performed to confirm the purity of the recovered Si, which was found to be of 3N grade.
안성수(Ahn Sung-Soo),이준규(Lee Jun-Kyu),안영수(Ahn Young-Soo),강기환(Kang Gi-Hawn),장효식(Chang Hyo-Sik),이진석(Lee Jin-Seok) 한국태양에너지학회 2021 한국태양에너지학회 논문집 Vol.41 No.6
In this study, a solution capable of leaching silver (Ag) from solar cells in an environment-friendly manner was presented, and a leaching effect according to the concentration was evaluated. Generally, a nitric acid (HNO₃) solution is used to leach Ag. However, it often causes environmental pollution owing to its high toxicity and the nitrous oxide (NOx gas) generated during the process, thus requiring considerable development. Accordingly, Ag leaching behavior according to the concentration was confirmed by mixing sulfuric acid (H₂SO₄) and hydrogen peroxide (H₂O₂) solutions. After this process, the optimal concentration condition was derived by confirming the Ag leaching effect through inductively coupled plasma-atomic emission spectroscopy (ICP-AES) analyses of the leachate. Additionally, Ag removal in the recovered scrap to which the optimal concentration condition was applied was confirmed using scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDS). Conclusively, as the H₂SO₄ and H₂O₂ mixed solution concentration increased, the Ag leaching effect tended to increase, and the optimal condition derived from the analysis reached a level capable of replacing the HNO₃ solution.