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It's not really fair to compare the efficiency numbers directly that way. The efficiency for hydrogen is measured from the hydrogen fuel directly, but the effic
by philwelch 2y ago
It's not really fair to compare the efficiency numbers directly that way. The efficiency for hydrogen is measured from the hydrogen fuel directly, but the efficiency of the EV is measured from the wall. In reality, generating electricity is about 40% efficient at best. Yes, there's also an efficiency cost to refining the hydrogen, but if we compare apples to apples and take a ton of LNG and use it to power an EV versus a hydrogen car, I doubt the EV is going to get more milage.
- pipodeclown 2y agoSure but you should be comparing the goal end state, a world in which out energy consumption and generation is green, that's the whole point of our move to bev's and hydrogen. So you should be comparing energy generation by green means to power a BEV or using green energy to produce hydrogen to power a hydrogen car. In that world the whole energy production and consumption chain is about 3x as efficient for BEV, which in my mind means there is no way hydrogen is going to be competitive and we shouldn't waste valuable resources on persuing it.
- philjohn 2y agoHydrogen that doesn't come from the natural gas industry requires that very same electricity to be extracted from water - so they're operating from the same baseline in my efficiency calculations.
- philwelch 2y agoBut the electricity is generated by burning natural gas.
- philjohn 2y agoNot 100%. A lot in the US, for sure, less in the EU where renewables are a much larger part of the grid, as is Nuclear (thanks to interconnects from France). And if we work at it that number might go the same way as Coal has within our lifetimes.