Abstract
With the on-going heightened issues on climate change, there is a global objective and shared responsibility to significantly reduce the CO2 emissions. Based on 2013 CO2 emissions, Japan is targeting a reduction by 26.0% in 2030 and by 80% in 2050. The proportion of solar energy in primary energy supply volume is expected to increase. Furthermore, because of the fall of electric power selling price, the use of surplus energy obtained by solar power generation is changing from selling to self-consumption. From these considerations, the solar energy systems are on the turning point. Therefore, there is a need to optimize the solar energy utilization systems from the point of view of CO2 emissions and costs. In this paper, we constructed a simulator by creating mathematical models they are experimentally validated. This can analyze the CO2 emissions and costs of various solar energy utilization systems constituted of PV panel, solar collector, heat pump water heater, and storage battery. By using this simulator, we compared the annual performance of introducing various solar energy utilization systems for a certain residential household in Japan.
