Economic Effect of Household Energy Systems Considering Initial Cost Redemption

摘要

In recent years, the application of the fuel cell cogeneration systems in residential houses has begun to draw interest in Japan due to their high energy efficiency and low carbon-dioxide emissions. Photovoltaic system also has gradually been introduced in the residential houses. However, their high initial costs are disadvantageous to the promotion of these systems in residential sector. On the other hand, the initial cost will decrease with the technological progress and the expansion of production. Few of researches addressed the economic effect of these systems considering the initial cost redemption. In this paper, by using the learning curve methodology, the initial cost redemption of these systems from 2005 to 2030 is predicted at an interval of 5 years. The annual operation of conventional system ( normal household energy system in Japan), fuel cell cogeneration system and photovoltaic system are simulated in a typical Japanese detached house and the corresponding annual running costs are evaluated. Based on these initial cost prediction and simulation results, the economic effect is examined from 2005 to 2030.