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주거용 건물 태양광발전시스템의 설치유형에 따른 발전성능 평가
김덕성(Kim, Deok-Sung),김법전(Kim, Beob-Jeon),신우철(Shin U-Cheul) 한국태양에너지학회 2017 한국태양에너지학회 논문집 Vol.37 No.2
The types of installation of the photovoltaic system applied to domestic residential buildings are classified as follows: Mounted modules with air circulation, semi-integrated modules with air duct behind, integrated modules with fully insulated back. In order to study generation characteristics of PV system, we verified the validity of interpretation program based on long-term measurement data of demonstration house installed in BAPV form and also analyzed the generation characteristics and performance of each installation type. The results are as follows. First, the RMSE of amount of generation and simulation according to annual daily insolation of demonstration system located in Daejeon was 0.98kWh and the range of relative error of monthly power generation was -5.8 to 3.1. Second, the average annual PR of mounted modules was 82%, semi-integrated modules 76.1% and integrated modules 71.9%. This differences were attributed to temperature loss. Third, the range of operating temperature of annual hourly photovoltaic modules was –6.5 to 61.0°C for mounted modules, –6.0~73.9°C for semi-integrated modules and –5.5 to 88.9°C for integrated modules. The temperature loss of each installation type was –14.0 to 16.1%, –13.8 to 21.9%, and –13.6 to 28.5%, respectively.
김법전(Kim Beob-Jeon),임희원(Lim Hee-Won),김덕성(Kim Deok-Sung),신우철(Shin U-Cheul) 한국태양에너지학회 2018 한국태양에너지학회 논문집 Vol.38 No.4
nZEH (net-Zero Energy House) is defined as a self-sufficient energy building where the sum of energy output generated from new & renewable energy system and annual energy consumption is zero. The electricity generated by new & renewable energy system with the form of distributed generation is preferentially supplied to electrical demand, and surplus electricity is transmitted back to grid. Due to the recent expansion of houses with photovoltaic system and the nZEH mandatory by 2025, the rapid increase of distributed generation is expected. Which means, we must prepare for an electricity-power accident and stable electricity supply. Also electricity charges have to be reduce and the grid-connected should be operated efficiently. The introduction of ESS is suggested as a solution, so the analysis of the load matching and grid interaction is required to optimize ESS design. This study analyzed the load matching and grid interaction by expected consumption behavior using actual data measured in one-minute intervals. The experiment was conducted in three nZEH with photovoltaic system, called all-electric houses. LCF (Load Cover Factor), SCF (Supply Cover Factor) and f grid (Grid Interaction Index) were evaluated as an analysis indicator. As a result, LCF, SCF and f grid of A house were 0.25, 0.23 and 0.27 respectively; That of B house were 0.23, 0.23, 0.19, and that of C were 0.20, 0.19, 0.27 respectively.
영농형 태양광 구조물 활용 고부가가치 작물의 이상기후 영향 분석
김우람(Wooram Kim),남재우(JaeWoo Nam),김근호(Geun Ho Gim),김덕성(Deok Sung Kim),임철현(Cheolhyun Lim) 한국태양광발전학회 2021 Current Photovoltaic Research Vol.9 No.2
Agrovoltaic system is a concept that combines agriculture and photovoltaic (PV) system by applying a PV system to the upper part of farmland. In this study, we developed a folding drive system for an agrophotovoltaic (agroPV) module (150 Wp/4×9 cell) exclusively for pear farming with 10 kW capacity. The system was installed in 2018, and the growth characteristics and quantity of pears under the agroPV folding system have been investigated for 2 years. We found that thare is no differences of the characteristics of pears grown under the agroPV system compared to the pears grown without the system (control) except the percutaneous color L of pear. However, the weight and sugar content of the pear grown under the agroPV system were decreased by 4.5% and 1.3°Bx compared to that of the control, respectively. We assume that this is mainly due to the influenced of the delay in flowering as upper PV module block some of sunlight. However, interestingly, when we deleyed the pear harvesting by 2 weeks, the weight of pears increased by 8.5% and they became nearly the sample as the control pears harvested 2 week earlier. In addition, we also found that the agroPV modules decrease the fall rate of pear when the typoon struck, also it mitigates cold damage by 38% during April by protecting from frost. In conclusion, it can be said that the agroPV system help to protect target crops from the environmental conditions and the quality of the crops are similar to the that of control.
영농형 태양전지 스트링 구성에 따른 발전량 및 농업생육환경 분석
김태영(Taeyoung Kim),김덕성(Deok Sung Kim),김근호(Geun Ho Gim),남재우(Jaewoo Nam) 대한전기학회 2020 전기학회논문지 P Vol.69 No.1
The distributed solar module composition in small size is necessary for simultaneous crop cultivation and power generation in agrophotovoltaic (APV). The purpose of this study is to compare and analyze PV power generation and agricultural environment changes according to different cell string composition (3×12 and 4×9 module). Ground solar radiation was simulated and a test-bed was constructed, with 30% shading rate, to collect monthly power and agricultural environment data for 10 months. The 3×12 module had a 0.7% higher ground solar radiation value than the 4×9 module in the simulation results. In test-bed, though the 4×9 module may be considered for use in the APV in terms of power production, ground solar radiation, and soil humidity, the 3×12 module should be considered that the damage of crops caused by waterdrop can be mitigated when the PV module has fewer strings. These results can contribute for the selection of standard APV module design in terms of installing 10GW of APV by government vision.