Originally Posted by AnalogMan
(Post 3392866)
Yes, of course you're right that it takes more energy in than you get out whenever you transform one form of energy into another.
My point regarding the Porsche 'miracle fuel' is that it's not really a 'miracle'. Electrolysis of water into hydrogen and oxygen was discovered 1789. The Sabatier reaction to make methane from hydrogen was discovered in 1897. My comment was that this basic chemistry has been around for a long time. The twist with Porsche's could be if you powered the reactions with renewable energy, theoretically it could be a carbon-neutral form of liquid fuel for IC engines. But if it was manufactured with energy off a standard power grid, it would seem to be pointless (it would be more efficient to just use the fossil fuel directly in a car rather than generate electricity with it to then get hydrogen from water and complex it with carbon etc.).
Of course, you could also use renewable sources (wind, solar, tidal, etc.) to generate electricity to then charge batteries in BEVs. But at the current state of technological development, IC engines and liquid fuels still have several advantages over BEVs. Such as, greater range (not everyone can afford the $70,000 for a Tesla S 100 kWh), refueling time (3 minutes at a gas pump beats even a 'fast charger'), and may be more practical for people who don't have ready access to a charging station (such as those who live in apartments).
Taxing fossil fuels more heavily is an economic option but not a technological solution. Unless the tax revenues were somehow used to pay for converting the power grid to renewables, build more charging stations, and and subsidize BEV purchases for people who can't afford them (great idea but could you imagine the U.S. government actually doing that?), all it would do is put a disproportionate financial burden on those least able to afford it.
If gas suddenly was taxed to $10 a gallon tomorrow, or was made illegal, what would everyone who cannot afford a BEV do? Mass transit is the standard go-to answer, but most people can't get to where they work using mass transit. Even if somehow magically everyone was given a BEV, net use of fossil fuels wouldn't change that much right now, because 2/3 of electricity in the U.S. is generated with fossil fuels (natural gas and coal).
Then there's also the elephant in the room that the current electric distribution grid couldn't handle the additional loads if everyone suddenly had a BEV instead of an IC car. The cost of expanding electricity distribution capacity is usually not factored in to the price of going to an all-electric future.
The ultimate answer which underlies any prospects for a future for humanity is the need for the electric power grid to be generated from renewable sources and not fossil fuels. That's when BEVs truly make sense, when the batteries are charged by wind, solar, etc. and not from generating plants burning natural gas or coal. If we want to save the planet, and save ourselves and the future of most forms of life in the process, we will have to stop getting most of our energy from burning carbon-based sources dug out of the ground.
Unfortunately, the ultimate pesky reality is always the same: money. I've seen estimates that the cost to convert the U.S. electric grid to renewables is about $5 trillion. Cost over-runs and the usual graft and corruption with major projects like that would probably increase it substantially. The payback time would be far longer than most corporations could bear (shareholder pressure is fierce to maximize short-term profits), so it would take some kind of government funded effort.
Given the massive long-term damage being done to the world economy thanks to the pandemic, that won't be easy. The U.S. is already adding trillions of dollars worth of long-term debt with economic bailouts that must be paid back. It's hard to see where an extra $5 trillion+ could come from.
I'd love to see our power grid generated entirely from renewable sources. But there's no easy one-click solution to achieve this. If there was, it would have happened. That's always the problem with utopian ideals - they run into the painful brick wall of economic realities. As long as this country (and most of the world) remain fundamentally capitalist where profit is the most important (and often only) priority, money will decide what happens and when.
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