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Except that electric engines can be more than 90% efficient while combustion engines are 30 to 45% efficient.
by gbugniot 9y ago
Except that electric engines can be more than 90% efficient while combustion engines are 30 to 45% efficient.
- otabdeveloper1 9y ago> if you ignore the creation and disposal of the batteries
- dragontamer 9y agoThe engine may be 90% efficient, but the charger is only 95% efficient, and the electric grid is only 90% efficient. And then the coal power plant that generates all that electricity is only 40% efficient. All of a sudden, combustion engines are better in overall efficiency. Transporting liquid fuel and distributing it has major efficiency benefits.
- jjtheblunt 9y agoYou made a big presumption though with the word "coal", which supports your calculation but isn't realistic.
- dragontamer 9y agohttps://www.eia.gov/tools/faqs/faq.php?id=427&t=3 https://www.eia.gov/tools/faqs/faq.php?id=427&t=3 > Natural gas = 33.8% > Coal = 30.4% > Nuclear = 19.7% > Renewables (total) = 14.9% Granted, Natural Gas is highly efficient, but Coal is still a major contributor to people's electricity generation in the USA.