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Producing hydrogen when there is excess power from renewable source could be a great addition to the mix of "how to store energy when we produce more than we ne
by danmaz74 8y ago
Producing hydrogen when there is excess power from renewable source could be a great addition to the mix of "how to store energy when we produce more than we need, and use it when we need it".
- ridewinter 8y agoI don’t understand why this isn’t the answer to the problem of excess renewable energy at the times we don’t need it?
- rurban 8y agoBecause of security. Hydrogen is pretty dangerous, much more dangerous than anything else.
- Havoc 8y agoIs it that much more dangerous than say LPG though?
- deleted 8y ago[deleted]
- ridewinter 8y agoIs security the reason that hydrogen vehicles haven’t taken off yet, or is it a question of infrastructure?
- lev99 8y agoJust compare hydrogen cars with electric cars and you'll see why people prefer electric. CA has 33 hydrogen refueling stations, so many people in CA could get by with one.
- rurban 8y agoWell, security is fixable. It's hydrogen after all and not a heavy gas; in case of leaks it goes up not down. leaks are still dangerous as it explodes when being mixed with oxygen. the flames are invisible, you only feel being burned but you don't see it. but the biggest problem is psychological: The Hindenburg, still
- konschubert 8y agoMostly because of the cost associated with turning electricity into hydrogen. Which I hope will be coming down in future.
- the8472 8y agoFor simple grid storage the efficiency is just bad. The electricity-hydrogen-electricity round-trip efficiency is about 60%, pumped hydro or batteries can do better. So it's only worth it if you have other uses for the hydrogen or need longer-term storage, e.g. gas reservoirs. Plus any infrastructure you build will have to be overprovisioned because by definition it'll be designed to absorb peaks and run idle the rest of the time, which makes it even less profitable.
- baud147258 8y agoOne way it's used in France is pumping water from below hydroelectric dams to above, so the water can be reused by the dam during the day to produce electricity.
- danmaz74 8y agoThat's great, where it's feasible. Which isn't enough places, as you need abundant water, a higher reservoir, and a lower reservoir.