Abstract
The concept in which renewable energy is imported from foreign countries or other regions using energy carriers should be strongly promoted from the viewpoint of energy security and climate change in addition to development of other energy technologies. The apparent economic comparison among electricity and these chemicals as energy carriers was done in our earlier studies. However the costs in our earlier studies were relatively high compared with the present electricity prices. In this paper, cost reduction of these systems is described. By setting parameters properly, the re-electrification cost in Japan is reduced to the range of the present electricity price in Japan. Therefore, large scale demonstration and deployment projects and/or financial incentives for these systems are necessary to commercialize these systems.
