Forum Discussion
valhalla360
Dec 20, 2018Navigator
Chainwright wrote:
No no no. No pie in the sky nothing. At the end of the day it's becoming about efficiency. You have to ask yourself what is MORE efficient, a Combustion Engine or an Electric motor?
The second law of thermodynamics puts a fundamental limit on the thermal efficiency of all heat engines. Max efficiency of combustion engines fueled by petroleum is 20-25%, diesel tops off at 40%. electric engines can be more than 90% efficient and even up to 98% efficient, but even at 75% it would be a win win.
Yeah, back in 1906 Automotive technology was "Pie in the sky tech" too. Well we see how that went.
Problem with your analysis is you've included the full efficiency of IC engines but omitted the least efficient part of battery EV's
- You still have inefficiencies in the generation.
- Inefficiencies in transporting the electricity
- Inefficiencies in battery charging.
- Plus the inefficiencies in the electric motor.
When you do an apples to apples comparison...electric is no more efficient and in most cases worse.
Of course, the big issue is really energy density. Even if we buy your supposed efficiency, batteries hold so little energy that it's not even close on range.
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