3 ms·

You cannot get every kWh from renewable energy into a BEV no matter what. The intermittency problem guarantees that a lot of it will be lost or never captured.

by _hypx 3y ago

You cannot get every kWh from renewable energy into a BEV no matter what. The intermittency problem guarantees that a lot of it will be lost or never captured. An idea like hydrogen that lets you store energy for long periods lets you utilize energy that otherwise would be lost. As a result, the full cycle efficiency of a hydrogen car can exceed that of a battery car.

entropicgravity 3y ago
'... lets you store store hydrogen for long periods of time' is not as easy as you suggest. It's well known that hydrogen makes most (possibly all) metals become brittle over time. Hydrogen also leaks easily through metals because the atoms are so small. Consequently very expensive tanks are require to '..store hydrogen for long periods of time...'. It's a near certainty that storing energy for long periods is more effectively done with Megapacks of batteries. A little googling will show that Tesla (and others) are now making a booming business in this technology whereas, to my knowledge, not one substantive hydrogen storage plant has been built to date, because of the problems stated above.
- _hypx 3y ago
  > It's well known that hydrogen makes most (possibly all) metals become brittle over time. It's not "well known." In fact, this is bullshit. Only some metals have this problem. Even then there are ways of preventing the problem via coatings and the like. Nor is it even necessary, as geological formations can be used to store hydrogen in the same way we store natural gas. You are simply reading too much pro-BEV propaganda. These are solved or are easily solvable problems.
_aavaa_ 3y ago
> As a result, the full cycle efficiency of a hydrogen car can exceed that of a battery car. No it does not. Efficiency is about energy in at the source versus energy out energy out at the wheels.

3 ms·

You cannot get every kWh from renewable energy into a BEV no matter what. The intermittency problem guarantees that a lot of it will be lost or never captured.

by _hypx 3y ago

entropicgravity 3y ago
'... lets you store store hydrogen for long periods of time' is not as easy as you suggest. It's well known that hydrogen makes most (possibly all) metals become brittle over time. Hydrogen also leaks easily through metals because the atoms are so small. Consequently very expensive tanks are require to '..store hydrogen for long periods of time...'. It's a near certainty that storing energy for long periods is more effectively done with Megapacks of batteries. A little googling will show that Tesla (and others) are now making a booming business in this technology whereas, to my knowledge, not one substantive hydrogen storage plant has been built to date, because of the problems stated above.
- _hypx 3y ago
  > It's well known that hydrogen makes most (possibly all) metals become brittle over time. It's not "well known." In fact, this is bullshit. Only some metals have this problem. Even then there are ways of preventing the problem via coatings and the like. Nor is it even necessary, as geological formations can be used to store hydrogen in the same way we store natural gas. You are simply reading too much pro-BEV propaganda. These are solved or are easily solvable problems.
_aavaa_ 3y ago
> As a result, the full cycle efficiency of a hydrogen car can exceed that of a battery car. No it does not. Efficiency is about energy in at the source versus energy out energy out at the wheels.