Quote:
Originally Posted by FastFrog
Quote:
Originally Posted by H2O_Doc
It's can still be a net carbon reduction because the ICE is so horribly inefficient. That a power plant is powered by fossil fuels doesn't mean that the EV that charges off of it doesn't represent a reduction in emissions over its gas powered counterpart.
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This is a good point. It is indeed possible.
However, we can't just state that power plants have a higher energetical efficiency than individual cars (closer to maximal therical efficiency, see Carnot and all stuff), which is true, to conclude in a way or another.
To do so, we have to consider all the contributors to the global energy cost. Line loss as already stated (which has its counterpart with trucks dealing gas to stations), but also recharge efficiency, electric motors efficiency, battery production energetical cost (ICE production obviously costs as well), etc.
All in all, I wouldn't be surprised if global cost of primary energy is close for EVs and ICEVs.
- In case primary energy is fossil for both cases, carbon emissions would then be pretty close.
- In case primary energy is partly or fully nuclear for EVs, carbon emissions would then be lower for EVs. |
Yes, it's complicated and the whole carbon cost account has to be done. I think it's very important that we have good numbers on whether and how much net carbon reductions are being achieved. And we should assume just because it's electric, it's better. Very important points.