Seasonal storage of hydrogen to balance renewable generation will be cost-competitive in 2050, says DNV GL, a Norway-based consulting firm that advises the energy and shipping industries. The firm models nonstop production of hydrogen every summer, using electrolysis units powered by market electricity. The hydrogen would be compressed and stored underground in salt caverns or depleted gas fields, and the following winter would be converted nonstop to electricity, using fuel cells. Daily balancing would be achieved using batteries and pumped hydro. To the extent the entire grid ran on renewables in the summer, the hydrogen would be “green,” or renewably produced. A project along these lines is under development in Utah, and would use underground salt caverns to store hydrogen. The hydrogen would be renewably produced by 2045, to help Los Angeles achieve its renewables goal.
PV Magazine 16th March 2020 read more »