ACES Delta to install pressurised alkaline electrolyser after tests

US-based ACES Delta project is to use a technology based on alkali electrolysers that can respond to variable renewables, subject to the successful completion of large-scale testing in Japan.

The alkaline electrolyser is being tested at Mitsubishi Power’s Takasago Hydrogen Park in Japan (Image credit: MHI)

The 5.5MW single-stack pressurised alkaline electrolyser is being validated in two stages at Mitsubishi Power’s Takasago Hydrogen Park in the Hyogo Prefecture.

A single unit was installed and tested at the Herøya Industrial Park in Norway, where the short-term validation culminated in a 96-hour baseload run. 

The technology is now undergoing long-term validation at full load and in real-world conditions at a permanent installation in the Takasago Hydrogen Park, where the electrolyser will be operated under the same conditions as it would operate commercially. 

The full-scale validation aims to minimise technology risk and includes performance, operations, start-ups, shutdowns, gas quality, safety and digital control integration.

The Advanced Clean Energy Storage (ACES Delta) project in Utah, USA, is a joint venture between Chevron and Mitsubishi Power Americas. 

ACES Delta will produce, store and deliver green hydrogen from 2025, using renewable energy-powered electrolysers. Two salt caverns will each store 150GWh of the hydrogen produced for dispatch to the grid when needed.

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