A car with 0 fuel consumption

hi,
A question which was troubling a lot is can a car with no fuel
consumption is possible or what.
Three things led to me to think about it
1. On the bottom of a lorry I saw a long rod rotating, which was
rotating the backend wheels and engine it was.
2. A generator uses petrol which rotates a rod in between magnetic
field to produce electricity.
3. The thing what I require in a vehicle is motion.
I studied in my 12th standard that some energy is lost in a generator.
Can I use a generator to run my vehicle. But not with petrol but with
electricity only.
I will produce some electricity with the electric generator, loose
some, but I can save some thing. Motion is there , which I will use to
move the vehicle.
electric generatory:- electricity+ motion;
1. electricity back to generator
2. Motion to run the vehicle
I am not a mechanical engineer, ( a computer engineer) but this
question is puzzles me , I think such a system can be built, but if it
can be built why has it not been built, what were the limitations.
If limitations are there with so much advancement in mechanical
engineering why cannot we overcome those.
I would be happy if any body can throw some light on these facts.
I am open for critics.
regards,
RAMESH
Reply to
RAMESH
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Dear RAMESH:
These are electric cars. Energy is stored in batteries (around 40% thermal efficiency from charge losses to discharge losses), then released to move the car.
Only a perpetual motion machine works with no losses. Even electric cars run on electric energy that is provided by others.
If you put a motor to drive the front wheels, and a generator on the back wheels, no motion would occur. If you pushed the car to put energy in it, it would stop. The generator is not 100% efficient. The wires between the two devices are not 100% efficient. The motor is not 100% efficient. And they all have varying efficiency at different rotating speeds.
...
The efficiency of a system is the product of the efficiencies of each linked system. So a 95% generator driving a 95% motor through 99.9% wires, yields 90% system efficiency. Energy is lost. Motion stops.
We can reduce the losses, but the system would still not be self-starting, and it still would grind to a stop.
David A. Smith
Reply to
N:dlzc D:aol T:com (dlzc)
No, a car with no fuel consumption is not possible.
This general area is called, for convenience "Perpetual Motions"
The search for perpetual motions effectively ceased in the mid ninteenth century when it became apparent that energy conservation laws demanded an input, if work was to be output.
Brian Whatcott Altus OK
Reply to
Brian Whatcott
What kind of a person could call himself ANY kind of engineer who has no grasp of the first and second laws of thermodynamics
Reply to
Tom Miller
Dear Tom Miller:
Be a little tolerant, Tom. Computers (or at least information science) deal with a "universe" that has no entropy that cannot be avoided. With careful design and proper maintenance, there is no loss of "energy". Objects only mutate when directed to do so. Stuff like that. It is possible for someone dealing with that world to forget the world that underlys that one.
David A. Smith
Reply to
N:dlzc D:aol T:com (dlzc)
Dear Greg Locock:
...
So stated in my post. The real world underlys the artifically created world. I'm certain that there are hosts of data tapes fading into illegibility, which is where magnetic domains go when entropy claims them. I was not trying to hide anything.
David A. Smith
Reply to
N:dlzc D:aol T:com (dlzc)
I suspect Tom's point is that either you are an engineer or you aren't, and if you are then you will have been taught things like Shannon's law, the laws of Thermodynamics, and Kirchoff's laws. Leastways, any engineer of any calling at my university would have had those inflicted on them.
BTW, you misunderstand (or perhaps deliberately misstate) the concept of entropy in computers. It is possible to minimise the loss of entropy in them, but there is always an energy overhead in processing data.
Cheers
Greg Locock
Reply to
Greg Locock
Sure it is. A car the doesn't consume fuel (within itself) is not only possible, they have operated. It's called an electric car. It is also called a flywheel car. No fuel is consumed in them. Fuels are consumables like wood, oil, CNG and gasoline. I know it is a technicality, because SOMEWHERE in the energy chain a fuel is consumed, but that doesn't mean my statement isn't true.
Reply to
Dan Bollinger
I disagree-- a non-solar electric car still uses fuel--it just uses it at the power plant rather that immediately at car
Reply to
Michael
Dear Dan Bollinger:
'consumed'
Silly. The battery does not have to be consumed to be a source of energy. Although with the slow disintegration of the plates over discharge/recharge cycles... maybe "consumed" is a pretty accurate description.
David A. Smith
Reply to
N:dlzc D:aol T:com (dlzc)
Nah, that's just wear and tear. It's not like lead disintegration is what's powering the car. Next you'll be saying that bearing wear makes the engine go 'round.
This is sillier: If you push your Buick backwards the tanks fills with gas?
The key here is the meaning of 'fuel' as oppossed to energy source. Fuel is an 'energy source', but not all energy sources are 'fuel.'
Reply to
Dan Bollinger

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