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태양광발전 효율향상을 위한 목표온도 추적식 냉각수 분사시스템 제어방법
정채봉(Che-Bong Joung),장성택(Seong-Teak Jang),이충식(Chung-Sik Lee),김태진(Tae-Jin Kim),김영근(Young-Geun Kim) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.2
As the Photovoltaic system market increases, various technologies are emerging to improve system operation efficiency. Such additional systems of the power generation system are generally referred to as ‘Balance of System’, for example a panel cooling, a panel cleaning and a panel angle adjusting apparatus. In this paper, we discuss an algorithm to calculate the target temperature of cooling in response to changes in the installation environment conditions of the power generation system so that the efficiency improvement rate target set by the user can be achieved with respect to the control method of the cooling water injection system among various panel cooling apparatuses. In order to calculate the target temperature of cooling, the output enhancement coefficient is calculated experimentally based on the temperature change according to the solar radiation condition of the PV panel, and the required reduction temperature of each irradiation condition is calculated considering the efficiency improvement rate. In addition, the efficiency improvement ratio is calculated considering the installation condition of the general power generation system without a separate control group. The thermal performance coefficient of the PV panel test body for calculating the expected temperature of the PV panel is calculated experimentally. The target temperature of cooling is calculated as the sum of the expected temperature of the PV panel and the required reduction temperature, and the injection system that tracks the target temperature by cooling water injection is constructed and compared with the power generation improvement rate and the user setting efficiency improvement rate.
태양광발전 효율향상을 위한 목표온도 추적식 냉각수 분사시스템 제어방법
정채봉 ( Che-bong Joung ),장성택 ( Seong-teak Jang ),이충식 ( Chung-sik Lee ),김태진 ( Tae-jin Kim ),김영근 ( Young-geun Kim ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.2
As the Photovoltaic system market increases, various technologies are emerging to improve system operation efficiency. Such additional systems of the power generation system are generally referred to as ‘Balance of System’, for example a panel cooling, a panel cleaning and a panel angle adjusting apparatus. In this paper, we discuss an algorithm to calculate the target temperature of cooling in response to changes in the installation environment conditions of the power generation system so that the efficiency improvement rate target set by the user can be achieved with respect to the control method of the cooling water injection system among various panel cooling apparatuses. In order to calculate the target temperature of cooling, the output enhancement coefficient is calculated experimentally based on the temperature change according to the solar radiation condition of the PV panel, and the required reduction temperature of each irradiation condition is calculated considering the efficiency improvement rate. In addition, the efficiency improvement ratio is calculated considering the installation condition of the general power generation system without a separate control group. The thermal performance coefficient of the PV panel test body for calculating the expected temperature of the PV panel is calculated experimentally. The target temperature of cooling is calculated as the sum of the expected temperature of the PV panel and the required reduction temperature, and the injection system that tracks the target temperature by cooling water injection is constructed and compared with the power generation improvement rate and the user setting efficiency improvement rate.
성태경(Sung Tae-Kyung),박연민(Park Yeon-Min),김종민(Kim Joung-Min),이충식(Lee Chung-Sik),이을영(Lee Euol-Young),정채봉(Joung Che-Bong),김병철(Kim Byung-Chul) 한국태양에너지학회 2015 한국태양에너지학회 논문집 Vol.35 No.5
Whereas recent domestic buildings and industrial facilities are being constructed as large as possible, the daylighting systems for the large space have rarely been developed. Domestic situation has been reported as only several small or medium sized daylighting systems have been developed, and the large scaled systems have entirely being imported from abroad. We have developed a large scaled daylighting system for the big space. The developed system have been evaluated in terms of the average system efficiency and daylighting factor. Each results are shown with tabulated experimental data.
이을영(Lee, Euol-Young),성태경(Sung, Tae-Kyung),김병철(Kim, Byung-Chul),정채봉(Joung, Che-Bong) 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.11
In this paper the skylight panel of double glazing structure is developed for large space. A double glazing structure was selected for the shape of the skylight panel. The result of optical simulation that consists of 3-D modeling and ray tracing was applied to the pattern adopted in the sky light panel. And new type of molds was designed for making double glazing structure. The pattern of bending point and the condition of exterior molding were suitable for design criteria in analysis of the skylight panel structure, But, the structure was easily damaged by external impact because of the stiffness of material and imperfection of mold condition.