8·20 hours ago- Yes.
- Hydrogen as a fuel is stupid and impractical, it’s dead because the thermodynamics suck and there’s no real benefit (even energy density isn’t far off the better batteries nowadays). Hydrogen is the new carbon capture, I.e. dead-end technology that people pull out to get headlines and fake some green credentials.
- If you want to store heat, you can just store it in a bunch of rocks wrapped in insulation. It needs to scale up a bit, because the cube-square law makes it cheaper and longer lasting the bigger it is, but at a 20 metre wide cylinder with 1 metre thick insulation, you can use summer solar to cover the entire winter’s heating needs for a city district with 1950s technology and no moving parts besides the fans in the air ducts (and a normal district heating system).