2015 年 81 巻 826 号 p. 14-00164
In this study, we propose a Photovoltaic power generation (PV) and Fuel Cell (FC) hybrid system for residential use to reduce consumption of energy originated from fossil resources. In the hybrid system, FC supplies electricity and heat into residence with hydrogen fuel, which is produced by power of PV installed at house. So, consumed energy is generated by PV and FC which are operated with renewable energy. Therefore, energy independence in residence is approached with applying the proposed system. In the first report of this study, primary energy consumption in PV and Solid Oxide Fuel Cell (SOFC) combined system were calculated by simulation with optimizing method. The results of the first paper showed that the energy reduction of PV-SOFC combined system was larger than the sum of those in PV only and SOFC only system. In this second paper, energy saving performance and cost of PV -SOFC are compared with other energy systems —PV -Battery system in which PV power is stored as electrical energy, and PV-EHP system in which power of PV is converted into hot-water as thermal energy, to evaluate the effectiveness to store PV power as hydrogen energy in PV-SOFC system.
