5 ms·
Combustion engines are about 15-20% efficient. Toyota has 30+% engines in their Prius. Electric motors are about 90% efficient. So electric motors are about 5
by sebnukem2 10y ago
Combustion engines are about 15-20% efficient. Toyota has 30+% engines in their Prius.
Electric motors are about 90% efficient.
So electric motors are about 5x more efficient than ICEs.
- timthorn 10y agoBut don't forget the losses in charging the battery as well.
- Cshelton 10y agoThat's about 10%, and it's all heat. So to charge a 90kwh battery, you need roughly 99kwh of energy. Which for me, since it's charging in my garage, the excess heat is actually kind of nice as it will keep my garage slightly warmer in the winter and thus my house as my garage is on the lower floor. Either way, it's still WAY more efficient than any time of combustion engine. Including hydrogen. Hydrogen is kind of a wasted effort (unless we are doing fusion ;p )
- samfisher83 10y ago67% of electricity comes from fossil fuel. https://www.eia.gov/tools/faqs/faq.cfm?id=427&t=3 https://www.eia.gov/tools/faqs/faq.cfm?id=427&t=3 Efficiency of coal plant is ~ 33% http://www.eia.gov/electricity/annual/html/epa_08_01.html http://www.eia.gov/electricity/annual/html/epa_08_01.html Natural gas is about ~40%. So in reality you are getting 90% of ~35% or 31.5%.
- parimm 10y agoThere are combined cycle natural gas plants that can go up to 68% eff
- samfisher83 10y agoThat is not what it is currently for a majority of plants. Maybe there is few plants here or there, but I posted the data directly from eia.