Research on the Application of Solar Power to Rooftop Rainwater Harvesting System

• Main Authors: Li-Wei Wen, 溫立維
• Other Authors: Chao-Hsien Liaw
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/07116601238222571675

碩士 === 國立臺灣海洋大學 === 河海工程學系 === 98 === 97% of energy in Taiwan are imported. Water shortage becomes serious because of economic development. Therefore, developing renewable energy sources and alternative water sources become important issue in the future. Renewable energy includes solar, wind, hydro, biomass energy, etc. Rainwater harvesting can replace parts of domestic water supply such as toilet flushing, irrigation, car washing, etc. Research is combing renewable energy and rainwater harvesting is rare. This study tried to combine solar power system and rooftop rainwater harvesting system. According to practical conditions, four different types of combination can be found. They are categorized: independent system (TypeⅠ); connect with public electric system (Type Ⅱ); connect water public water supply system (Type Ⅲ); standard system (Type Ⅳ). The simulation process of each type of the system has been written by Microsoft Visual Basic 6.0 selected for sample study Keelung and Penghu are with data for 1999 to 2009. Results obtained from the simulation will provide on reference for people who are interested to installing the system required. Results show that total average annual rainwater used for toilet flushing occupies 40% of water supply in Penghu area, and 30% of power generation in used. On the contrary, in Keelung area, total average annual rainwater used reaches 40% and 58% of power generation is used. For the assumed care study, the suitable storage tank volume on the ground and temporary storage volume on the roof are 5 tons and 1 ton respectively in Penghu area. For Keelung area, they are 1.5 tons and 1 ton, respectively. Both of there deployments, rainwater used for toilet flushing can reach 50% of water supply. Results obtained from this research will provide a reference for system selection but other factor may influence the system deployment.