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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(Tae-Kyung Sung),이충식(Chung-Sik Lee),정채봉(Che-Bong Joung),김병철(Byung-Chul Kim) 대한설비공학회 2012 대한설비공학회 학술발표대회논문집 Vol.2012 No.6
We development of solar tracking prismatic daylighting system. In this system, we tackled some issues of the previous passive prismatic daylighting system; the system efficiency of the passive system is too much sensitive to the sunlight direction and the glare effect is inevitable due to solar motion. Developed system has equipped with an azimuth tracking device with own power generating unit which can provide the power need to track the solar motion in azimuth. We tested the system efficiency of the developed system after test field installation and compared with the results of the previous system. Results show that system efficiency of the developed system is higher 40% respectively than the previous.
자연조명과 인공조명이 병행 적용된 하이브리드 디밍제어시스템의 성능평가
성태경(Sung, Tae-Kyung),이충식(Lee, Chung-Sik),김병철(Kim, Byung-Chul),정채봉(Joung, Che-Bong),강승훈(Kang, Seung-Hoon) 한국태양에너지학회 2014 한국태양에너지학회 논문집 Vol.34 No.3
In this paper, the performance of Hybrid Dimming control system for Daylighting system is evaluated by accredited tests. The system controls the balance of illuminance of daylight between daylight system and LED light system. It makes the normal illuminance of interior without the effects of weather by controlling the LED depending on the brightness of outside. For the tests, 6 diffusers(600x300mm) were installed in lighting area(36㎡) and normal operation of the system sensors were tested about the interference of sunlight. The results of the examinations were satisfied with the criteria of accredited tests. Further research is the verification of energy saving effect by comparing the Hybrid Dimming control system to current artificial light system.
성태경(Tae-Kyung Sung),이충식(Chung-Sik Lee),김종민(Jong-Min Kim),정채봉(Che-Bong Joung),김병철(Byung-Chul Kim) 대한설비공학회 2013 설비공학 논문집 Vol.25 No.5
We developed a parabolic reflector based daylighting system which can be used as an alternative indoor daytime lighting device such as for fluorescent lamps. The system comprises three main components:a daylight concentrator made of 4 pairs of parabolic reflectors and mirrors, a silica optical fiber bundle based light transmitter, and 4 light diffusers for the final indoor delivery of the collected daylight. We analyzed the performance of the system and revealed the system efficiency and daylighting factor. All test methods follow the rule, NR PV601:2007-daylighting system, governed by Korea Energy Management Corporation.
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.
성태경(Tae-Kyung Sung),이충식(Chung-Sik Lee),김종민(Jong-Min Kim),정채봉(Che-Bong Joung),김병철(Byung-Chul Kim) 대한설비공학회 2012 대한설비공학회 학술발표대회논문집 Vol.2012 No.11
In this papers, we developed Solar Tracking Lens-Optical fiber Daylighting System. This system has Double plate structure, the front plate for fixing lens and the rear plate for fixing optical fiber. As field test results show that system efficiecy is 38.89%, average illuminance of diffuser is 28,389 lx, average illuminance is 1,715 lx.
이충식(Chung-Sik Lee),성태경(Tae-Kyung Sung),정채봉(Che-Bong Joung),김병철(Byung-Chul Kim) 대한설비공학회 2012 대한설비공학회 학술발표대회논문집 Vol.2012 No.6
In this paper, We developed a prototype of concave mirror Type solar tracking daylighting system. This system has conducted for improving color rendering, one of weak points of the previous lens-POF type daylighting system. we compared the developed system with the previous system about performance. Results show that color rendering(Ra) of the developed system is higher 30(Ra) than the previous.