발전실적에 의한 20kW 태양광시스템의 전과정평가 및 경제성분석

Abstract

The application of Photovoltaic(PV) systems has increased too slowly because the costs of electricity with PV systems are more expensive than the fossil fuel generations. However, in the Life Cycle Assessment(LCA) point of view, the environmental performance of PV systems is more excellent than the fossil fuel generation. Thus, the environmental authorities encourage the application of PV systems by adopting the incentive policy that provides the support fund for PV system. For these reasons, each research such as LCA, the economic evaluations, the reasonable ratio of support fund for PV systems has been conducted by each researcher about the systems in the worldwide. But the comparative researches of these parts were not sufficient. This research aims to contribute to increasing the application of PV systems by presenting the environmental performance and the economic feasibility with the variation of ratio of the support fund for a 20kW PV system in Busan. The results of this research show that Energy Payback Time(EPBT) of the system is 10.41(year) and Green House Gases(GHG) emission of the system is 68.69(g-CO2/kWh) which is 12.8% of fossil fuel GHG emission; 2,397(g-CO2/kWh). In the economic analysis, the conditions are the life time is 30years, the performance decreasing is 20(%/30years). The result of the economic analysis shows that IRR is 8.38(%), NPV is 23,731,000(Won/30years), PBP is 14.6(year) In conclusion, to increase the application of PV systems, the ratio of supporting fund should be increased in Korea.