Water-powered cars? Yeah right!,

Nick Lewis 2448°

Come on, be real! How can a car possibly run on water? If that were true, the water companies would have competed against the symbiotic relationship between Big Auto and Big Oil. Prove me wrong.

4 replies

I'm with you Nick. Water fueled cars are scam (at best). But then again, siding with you is actually siding with the laws of physics, so it's really a pretty easy choice.

Written in June 2008

It takes more energy to split the water into oxygen and hydrogen than you get back from the hydrogen in power, so it's technically impossible.
But you can run a car on air - http://www.aircarcatvolution.com/

Written in June 2008

Leanne V. 197°

The myth is busted. The metal hydride is the fuel for the car, not the water itself. Neat trick.

"Ya canna change tha laws a physics, cap'n!"

Scotty said it all, really.

In the meanwhile, your best and most effiecient transport method remains - the bicycle. Closely followed by the horse (and other animals) and your own two feet.

Written in July 2008

Charles M. 110°

While "water powered" cars are an outright scam, it is possible that water injection or hydrogen injection **could** improve the efficiency of an otherwise very inefficient process.

We know that any energy cycle is lossy. For example if you use the car's alternator to break down water into hydrogen and oxygen and then burn those to get power you will have to put in a whole lot more power than you get out. For example, you might be putting in 2 units of energy and getting 1 out.

However, there is a possibility that adding the hydrogen to a regular gas engine combustion **could** improve its efficiency to more than make up for that loss.

Or in numbers:
A regular gas engine might take in 20 units of energy and give you 10 out. However if you inject 1 unit of hydrogen the efficiency **might** improve to give you 15 units of energy. So that gives you a gain of 5 units of energy at the cost of 2 extra units of energy to make the hydrogen or a nett gain of 3 units!

Notice please that I use words like **could** and **might** because I would not bet on this panning out in the real world. If it did work then chances are your car's engine needs a tune up and that would give better results than fiddling with hydrogen. I also doubt very much that any modern car with a modern combustion control/ignition system is going to gain from this.

Note too that this does not violate any laws of physics. It just makes more efficient use of the waste energy going out the tailpipe.

Written in July 2008

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