Technically, any heat (or sound) produced by an engine is wasted energy.
An ideal engine would produce no heat or sound, having converted all
the chemical energy into mechanical energy.
Consider my house furnace, for instance...it converts 95% of the fuel
energy into useable heat. The exhause is cool enough that it uses
plastic pipe for the exhaust.
Given that current car engines are something like 35% efficiency, there
is a lot of room for improvement.
Well, not totally, the heater uaes the engine heat to warm the car in the
Exactly, typically electricity is 4 times more efficient to power a car.
Oddly it is cheaper and uses less fuel to create electricity to power that
car than it is to use that fuel directly to power the car. Today's car
engines are an inefficient design to convert fuel into immediate energy.
It would probably be a good idea for him to talk with the SawStop people,
they successfully made it happen with similar skepticism and pit falls.
I am not so sure that I would be too concerned about connectivity initially.
The car sized engine would be tiny, IIRC the inventor held up a coffee can
sized object suggesting that a car engine could be that size. With mass
production cost would come down and something that small would probably be
similar in cost to a starter motor. So you have to replace the motor 3 or 4
times during the life of a car, not totally unlike replacing 3 or 4 sets of
tires and or 2 or 3 batteries.
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