Estimation of technology level required for low-cost renewable hydrogen production

ScienceDaily | 1/31/2019 | Staff
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The effort to increase renewable power generation has encountered some issues, such as unstable power generation and low annual capacity ratio. Specific examples include Japanese power companies suspending acceptance of applications from renewable energy suppliers in September 2014 and Kyushu Electric Power Company controlling output power suppression of solar power generations in October 2018. To address these issues, various organizations have been studying systems capable of storing excess electricity in rechargeable batteries and power-to-gas (P2G) systems capable of producing hydrogen using renewable electricity and storing and supplying produced hydrogen. However, most of these systems were found to be expensive to operate, undermining the effort to massively implement economically feasible power generation technology driven by domestic renewable energy.

The joint research team designed an integrated system (diagram below) capable of adjusting the amount of battery charge/discharge and the amount of electrolysis hydrogen production in relation to the amount of solar power generated. The team then evaluated the economic...
(Excerpt) Read more at: ScienceDaily
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