jd
alternator of car when running produces how much? i guess 12v at least and so many amps/watts
from that much (say 5 ampres gives 30% to power a car)
im saying you can get a lot more power from what youre putting in
to what your getting out
For 100s of years people have been trying to make 'perpetual motion' machines. A machine that gives out more energy than it consumes. For exactly the same length of time they have been failing - not because they haven't found the answer yet but because it just isn't possible.
There is hope in all of us, like hoping to win the lottery, however this is like trying to win the lottery without buying a ticket!
The only way you could get more energy out is if the laws of physics / thermodynamics/ entropy and basically all of science were wrong. Not just slightly wrong but completely wrong. Even when looking at the quantum level where weird things happen like particles just appear and disappear, on average you still have nothing and it still works out perfectly.
Any energy you take from the alternator will require the engine to work harder and use more fuel. An alternator I guess is only 80% efficient, so you have already lost 20%, now add the losses in making the H2 due to heating and finally the 30% efficiency of the engine itself. You have lost ma massive amount! Even if you had 100% efficiency in everything (this means ZERO friction, heating of components, and an 100% efficient car engine so no radiator needed to keep it cool!? etc) you still only get what you took in the first place.
The key to fuel efficient motoring is making the car as efficient as possible. Think about the energy getting you and your 1,500KG car up to 40mph, only to slow down again at the next junction. If that energy could be captured rather than wasted as heat in your brakes you could use it to accelerate again. Unfortunately we don’t have batteries that can charge that quickly, or capacitors small enough to store all the energy – but research in this field is rapidly being done and this is where any answers will be found.
So we want to get closer and closer to 100% efficiency where no energy is lost. This we can achieve through research and innovation.
Finally just think about the numbers. A modern 1.6 car engine produces about 100 bhp = 73 KW. In terms of electrical power, at 12 Volts that would be (73,000 / 12 = 6,083 Amps) Remember that is the OUTPUT of the engine and modern engines are about 30% efficient as most of the input energy (petrol) is wasted as heat and noise. This means you need to input 243 KW to get your 73 KW output. So this equates to (243,000/ 12 = 20,250 Amps)!!! If your alternator was working at full power you would probably get about 70 Amps out of it, so you would need (20,250 / 70 = 289) alternators fitted to your car! Now imagine them all working at full power and hopefully you can see there is no way your 1.6 engine could cope and it would just stall.
