Journal of the Hydrogen Energy Systems Society of Japan
Online ISSN : 2436-5599
Print ISSN : 1341-6995
Advanced alkaline water electrolysis system for renewable hydrogen production
Taketoshi USUI
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RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS

2016 Volume 41 Issue 1 Pages 16-22

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Abstract

Advanced alkaline water electrolysis system has been developed, which is based on our world top-level brine electrolysis technologies. Using the system, low-cost green hydrogen can be made at high efficiency from renewable energy such as wind power and photovoltaic power. In this system, hydrogen can be produced at about 82% energy conversion efficiency (HHV) by applying a current density of 0.6A/cm2 and at 90% HHV by applying a current density of 0.2A/cm2. Compared to conventional ones, it is possible to produce three times amount of hydrogen at the same 82% HHV on the same area of the electrode. The performance and durability of the system with fluctuating power are evaluating. The system can rapidly respond to precipitous change of electricity. A system equipped with the commercial size electrode (about 3m2) started demonstrating in 2015 in Yokohama-city.

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© 2016 Hydrogen Energy Systems Society of Japan
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