National Gas to trial Gravitricity’s H2 storage solution

The patented system uses lined geological shafts to store up to 100 tonnes of pressurised hydrogen at 220 bar, equivalent to about 3.33GWh of energy. Unlike natural storage such as salt caverns and disused gas fields, the shafts can be sited anywhere. Gravitricity has previously stated its preference for co-locating the storage near to renewable generation and potential major consumers of hydrogen such as heavy industry.

“The future large-scale adoption of green hydrogen in industrial processes and for heat and transport will require safe and cost-effective mid-scale hydrogen storage which can be located wherever required – both in distribution networks and at point of use,” said Martin Wright, Gravitricity co-founder and executive chairman.

“Each H₂FlexiStore can store up to 100 tonnes of pressurised green hydrogen safely below ground in a lined rock shaft which can be built more cheaply than above ground vessels, with a much smaller visual footprint. We believe it will be a key technology in gas networks of the future and we look forward to working closely with National Gas to share our combined expertise.”