Talya wrote:
Rafael wrote:
There's also some fundamental advantages that petrol fuel powered systems will hold for quite some time due to the long development history refining combustion propulsion: cost, power to weight ratio, and stability of fuel.
Electric batteries suck when, pound for pound, compared to gasoline in terms of available potential energy and stability in real-world environments. Hopefully, what cheap, plentiful electricity does is spurs the development of battery technology. Here, electrical engineers are simply at the mercy of material science research, just as mechanical engineers have been at the mercy of chemists.
CNG and petrol fuel powered engines will remain in use, particularly for certain applications such as aircraft, small watercraft and some types of automobiles. Eventually, batteries and other energy storage systems will be developed enough to phase that out.
Nobody would be using electric batteries. Hydrogen fuel cells are stable, provide a competitive mass-to-power ratio with carbon combustion, and would be cheap to manufacture if we had the electricity to separate hydrogen from water. Electric cars could already be run entirely on Hydrogen Fuel Cells, and they'd have a longer range before they need to pull into a service station to quickly swap cells than current cars do with a tank full of gas.
Using fusion to make hydrogen from sources other than fossil fuels (i.e. water) for fuel cells means there's another conversion process (electrolysis, thermolysis etc.) to manufacture hydrogen. Yes, there is a new way to generate hydrogen, but it is also limited by the abundance of its own fuel source. Any realized fusion reactor design is not implicative of instantaneous, unlimited electricity or heat for any purpose as you suggest.
Batteries have the advantage of fuel distribution systems already existing. It's likely transmission systems would not be able to handle the demand of an entirely battery powered vehicle fleet in the United States (or any developed country for that matter) in their current state but it's still at an advantage to HFCs as even if batteries need to be shipped by vehicle because it can still be augmented by the existing transmission system. Even a decentralized HFC production model would require significant up-front construction costs, including the up scaling up the current transmission networks over even what batteries would demand, as the process of electrolysis and hydrogen discharge consumes more energy than simply charging and discharging batteries.
Eventually, HFC may be be fuel storage unit of choice, but not without massive funding for development and construction to support it. So contrary to what you're suggesting, batteries will indeed play a part in the coming decades, and a significant one at that.