Re:How green is blue hydrogen?
by pfdietz on Friday August 13, 2021 @07:23AM
(#28167646)
Hydrogen energy storage capacity underground: $1/kWh
Li-ion energy storage capacity: somewhere around $200/kWh?
So, no, hydrogen is not "hard to store". It's vastly cheaper to store it at scale than it is to use shorter-term storage technologies. The disadvantage is low round trip storage efficiency (maybe 40% if used with a combined cycle power plant) but THAT'S OK for long term storage, which will have many fewer such iterations than diurnal storage.
If you want to level grid energy use and demand over a year, batteries would be insane. Hydrogen, however, could be quite practical.
Li-ion energy storage capacity: somewhere around $200/kWh?
So, no, hydrogen is not "hard to store". It's vastly cheaper to store it at scale than it is to use shorter-term storage technologies. The disadvantage is low round trip storage efficiency (maybe 40% if used with a combined cycle power plant) but THAT'S OK for long term storage, which will have many fewer such iterations than diurnal storage.
If you want to level grid energy use and demand over a year, batteries would be insane. Hydrogen, however, could be quite practical.