Efficiency Assessment of the Combined Photovoltaic and Heat Recycling System

• Main Authors: Shih-ChiLiao, 廖仕麒
• Other Authors: Ru-Min Chao
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/71935247593263119775

碩士 === 國立成功大學 === 系統及船舶機電工程學系碩博士班 === 100 === This study uses a hybrid system of a photovoltaic solar panel and a thermal-recycling hot-water arrangement (PV/T) to discuss the overall PV and hot water generation efficiency. The development of this hybrid system includes a solar panel with its own DC/DC converter operating at its maximum power point condition by quadratic maximization technique, and a hot water system using sprinkle nozzles to recycle the thermal heat from the back side of the solar panel. The entire mechatronic system operates under NI compact RIO platform including the embedded controller, input/output modules and self-developed DC/DC converter for system variables measuring and controlling. Thanks to the development of the distributed PV harvesting system, this work is able to generate maximum possible solar energy from the sun at changing insolation and any temperature variation due to heat recycling process of the water droplets. Experiment observation shows that the cooling system can increase the PV panel’s efficiency up to 4.06 %, and the thermal efficiency is about 25%~40%. It is then possible to identify the optimal working conditions for maximum PV power generation and heat recycling for the hybrid system in consideration. The work can be also helpful in designing a larger hybrid PV/T system for residential purpose.