Evaluation of the development potential of rooftop solar photovoltaic in Taiwan |
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| Affiliation: | 1. Technology and Business Integrated Service Section Industrial Upgrading Service Department, Metal Industries Research & Development Centre, Kaohsiung, Taiwan;2. Department of Industry Technology Education, National Kaohsiung Normal University, Kaohsiung, Taiwan;3. Department of Resources Engineering, National Cheng Kung University, Tainan, Taiwan;1. Chair of Building Physics, Swiss Federal Institute of Technology, ETHZ Zurich, Switzerland;2. Laboratory for Urban Energy Systems, Swiss Federal Laboratories for Materials Science and Technology, EMPA, Duebendorf, Switzerland;3. Laboratory for Multiscale Studies in Building Physics, Swiss Federal Laboratories for Materials Science and Technology, EMPA, Duebendorf, Switzerland;1. University of Maribor, Faculty of Electrical Engineering and Computer Science, Smetanova ulica 17, SI-2000 Maribor, Slovenia;2. University of Maribor, Faculty of Energy Technology, Hočevarjev trg 1, SI-8270 Krško, Slovenia;1. Chair of Energy Economics, Karlsruhe Institute of Technology (KIT), Hertzstr. 16, 76187 Karlsruhe, Germany;2. Chair of Business Administration, Production and Operations Management, Karlsruhe Institute of Technology (KIT), Hertzstr. 16, 76187 Karlsruhe, Germany;1. Renewable Energy Department, Research Center for Energy, Environment and Technology (CIEMAT), Av. Complutense 40, Madrid 28040, Spain;2. Polytechnic University of Madrid, ETSIDI, Department of Electrical, Electronic, Automatic Engineering and Applied Physics, Ronda de Valencia 3, Madrid 28012, Spain |
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| Abstract: | Because of extensive exploitation, fossil fuels are gradually becoming depleted and global warming issues are increasing. Therefore, all nations must develop alternative energy resources to reduce the potential risk of exhausting the available fossil fuel energy supply and to resolve environmental degradation.The amount of sunlight and installed power capacity are crucial factors that influence solar photovoltaic (PV) efficiency. Among domestic and international studies, numerous scholars have proposed various installed power capacity assessment models, which typically calculate areas based on sub-fields, ground floors or per capita. However, an evaluation of the potential of solar PV power generation on rooftops indicated that the shadow effect caused by building structures substantially influence the amount of installed power capacity. This study aims to effectively compute the shadow areas (shaded areas) on rooftops. By using the Hillshade module, the buildings' elevation data and the solar azimuth and altitude angles at different hours were calculated to obtain the hourly sun/shade grayscale values. The grayscale values were then integrated into binary images to calculate the shadow areas on rooftops.This study suggests that the rooftop solar photovoltaic installation capacity is some 12,428.5 MW and power generation capacity 15,423.75 GWh in Taiwan. |
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| Keywords: | Rooftop solar photovoltaic Geographic information systems (GIS) Threshold value Hillshade |
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