ビル一体型太陽光・燃料電池ダブル発電システムの最適サイズの検討

抄録

A building integrated energy system (photovoltaic (PV) and fuel cell (FC) is proposed for assessment of the energy-sufficiency rate in seven cities (Nagoya, Toyota, Tajimi, Takayama, Ogaki, Hamamatsu, Shizuoka) in Tokai region. In this work, it is considered that the electricity requirement of the building for household user is provided by the building integrated photovoltaic (BIPV) system and the gap between the energy demand and BIPV supply is fulfilled by the FC. The FC is powered by the electrolytic H₂ produced from the surplus power of PV. A design study of using the proposed system in seven cities has been performed. It has been observed that the monthly power production from BIPV as well as FC system is higher than in spring and summer, while it is lower in autumn and winter at all considered locations. The self-sufficiency rate of the FC system is higher with decreasing households’ number and it has been observed that the 16 households are more suitable. Since the climate condition is more favorable, Hamamatsu is the best city for installing the proposed system among considered cities. The relationship between the households’ number and self-sufficiency rate of the FC system per solar PV installation can be expressed by the approximate curve of y = ax^b well.