Abstract
The energy conversion efficiency of PEM electrolysis for H2 supply station was examined by verification test equipment. A high temperature electrolysis was also evaluated for purpose of reduction of power consumption using exergy diagram. A characterization of hydrogen energy was estimated by calculating Japanese power demand forecast with exhaustion of fossil fuels in mind. Also thermal power plant efficiency was calculated to put through Kyoto Protocol goal. Furthermore, water splitting by solar energy was considered for sustainable energy.
