A Study of Building-integrated Solar Hot Water Heater

• Main Authors: Yu-Hsing Lin, 林佑星
• Other Authors: Bin–Juine Huang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/01407579376223655110

碩士 === 國立臺灣大學 === 機械工程學研究所 === 97 === The main purpose of the project is to develop a new type of solar water heater that can be viewed as building material, such as parapet and sun-shading canopy in order to improve the outward appearance from existing heater. The device can fit in with different constructing condition and mounting angle and by covering with various colors of glasses. Unlike regular heaters, the solar heater integrates water storage with collector to achieve lower volume and make cost down. In order to prove the feasibility of building-integrated solar water heater, an automatic monitoring system was designed and set up complying with CNS B7277 national standard. According to the experiment, by setting up transparent optical glass toward south with 25° angle of inclination (regular heater mounting method), we can get a figure of 0.621 for daily-total solar energy collection efficiency, and the result conforms to the condition of subsidy program－Daily-total solar energy collection efficiency ≧ 0.5 which was adopted by the Taiwan Government as a necessary condition for the acceptance of the program. The study analyses the influence toward daily-total solar energy collection efficiency when the solar water heater is mounted under different methods with different colors of glasses. The discrepancy is under 20% which was derived from the comparative result for on-site test and analysis data. Therefore, the analysis result of the study can be considered as a reference when mounting Building-integrated solar hot water heater. The study thus takes one step further to simulate and discuss the long-term performance and economical efficiency for the heater mounted in northern, middle and southern of Taiwan. From the above research, we come to a conclusion as follow: If the Building-integrated solar hot water heater being applied as parapet (vertical mounted), even in Taipei, the last area to develop solar energy industry, whether transparent, green or blue glasses are being chosen, the payback period for the heater can hold a performance of 7~11 years. Considering most dwellings were designed as tall buildings in Taipei and the spaces on the rooftop are usually not enough to mount conventional heater, the application of the research will be worthy of development in the future.