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> A coal powered EV has roughly equivalent emissions to a gasoline car, Can you cite this? Thank you
by abdullahkhalids 4y ago
> A coal powered EV has roughly equivalent emissions to a gasoline car,
Can you cite this? Thank you
- bryanlarsen 4y agoLet's do the math the other way. Germany is showing 543 gCO₂eq/kWh. A gallon of gasoline is 8887 grams/gallon. Add 40% to account for refining & transporting the gas to the gas station. A Tesla at 5 miles/kWh emits 109 g/mile. A Camry at 30 mpg emits 415 g/mile.
- niloc132 4y ago> A gallon of gas is 8887 grams/gallon. That doesn’t seem right, gas is 20-30% lighter than water and water is only 8lbs~=3600 grams.
- Symbiote 4y agoThe additional mass comes from oxygen from the air used to burn the fuel. Burn 1g of coal, to make it easy: C + O₂ → CO₂ Carbon has molecular mass 12g/mole (carbon has atomic weight ~12), carbon dioxide 44g/mole (12 + 2×16). So burning 1g of carbon produces 3.67g of CO₂.
- niloc132 4y agoAh thanks, that does indeed line up the numbers I had misunderstood.
- Tagbert 4y agoHere is a map produced with data from the Union of Concerned Scientists that shows the MPG equivalent in terms of CO2 in various US locations based on their power grid mix as of 2019. (Coal percentages have been dropping noticably even since then.) https://blog.ucsusa.org/wp-content/uploads/2021/06/MicrosoftTeams-image-2-1125x900.png https://blog.ucsusa.org/wp-content/uploads/2021/06/Microsoft... this is a tool that UCS makes available to give you a mpg equivalent for a particular EV in a particular zip code based on the same data. https://evtool.ucsusa.org/ https://evtool.ucsusa.org/
- bryanlarsen 4y agoBesides the fact that the grid has gotten cleaner, EV's have gotten more efficient and their manufacturing has gotten cleaner as a side effect of them getting cheaper. So those numbers are significantly out of date.