Back to Musk - I came across this in some searching, had seen it before, but maybe forgot that Musk had repeated it:
https://www.businessinsider.com/elo...-how-the-electric-car-got-its-revenge-2011-10
"You have enough electricity to power all the cars in the country if you stop refining gasoline," says Musk. "You take an average of 5 kilowatt hours to refine [one gallon of] gasoline, something like the Model S can go 20 miles on 5 kilowatt hours."
Well!!! As I have said, I'm technology agnostic, I believe in solutions. So if that were true, it seems obvious that we should stop driving petroleum based cars, and drive EVs, to the maximum extent possible/practical.
Wait a minute...
"if" it were true? That was Elon Musk talking, he's clearly a very bright, well informed, successful guy, and this is his field. He
must be right, right?
Well, I'm pretty skeptical of things that seem that obvious. I mean, why aren't we just doing it (going all EV) then? I recall looking up the number of gallons we refine in the US, and overall electrical consumption that goes to industry. I had read 6 kWh originally, and either number times the gallons of gasoline refined in the US just made up such a huge % of the total industrial consumption, that it just seemed hard to believe that it wasn't common knowledge.
So when I saw it again, I did a deeper dive and opened a spreadsheet instead of a napkin (lots of zeroes to keep track of). So here you go:
Sources:
Refined annual:
https://www.eia.gov/dnav/pet/pet_pnp_refp2_dc_nus_mbbl_a.htm
Refined energy consumption annual:
https://www.eia.gov/dnav/pet/pet_pnp_capfuel_dcu_nus_a.htm
I added up the various fuels (in thous bbl), multiplied by 42 g/bbl * 1000 ( comes to ~ 1..26x10^11). Divide the purchased kWh (4.86x10^10) by those gallons, and we get...
not 5 kWh. Not even 0.5 kWh, but 0.385 kWh. That is 385 watt-hours, about enough to drive an EV 1 mile, not the 20 miles that Elon said. But we must believe Elon, right?
Another easy calculation (nowhere near so many zeroes to keep trak of!) to see if this is in the realm of reality...
The industrial average for a kWh is $0.0691 ( source: .
www.statista.com/statistics/190680/...-estimates-for-retail-electricity-since-1970/). So 5 kWh per gallon would be ~ $0.35 per gallon - just for the electricity to refine that gallon of gasoline.
But this source (
https://www.eia.gov/petroleum/gasdiesel/ ) says that the JULY 2018 average gas price was $2.85/gallon, with 15% going to refining costs, and 15% = $0.43. If electricity made up 80% of refinery costs, it just seems there would be more awareness of that.
Apparently, this all comes from some twist of some study that said it took 6 kWh of
energy to refine a gallon of gasoline. But much of that energy comes from waste (or impractical to market) products of the refining process itself. It's not like you can run a Tesla on some thick goey tar-like substance.
But the EV fans just eat these numbers up w/o question, and beg our politicians to subsidize EVs "for the children". I suggest they learn some math - for the children!
-ERD50