""Free energy" from water mains pressure or complete BS?

[Howzit]

http://www.youtube.com/watch?v=yh_-DUKQ4Uw&eurl=http://www.cnczone.com/forums/showthread.php?t=72617

[The_Casual_Observer]

1. If they are getting more energy out than they are putting in, they

should rig it up so that they can unplug the motor & keep it running.

[salvorhardin]

2. Total scam

So-called over-unity devices are just another variation on perpetual motion machines.

[tanngrisnir3]

3. Complete and utter BS. "More than 100% efficient" should tip you off

[The River]

4. Total BS nt

[BlueJazz]

5. It does work....like my "Invention" works

You see ...you take this Generator...hook it to a motor, which drives the Generator, which drives the Motor, which...

I'll be Rich, I tell you..Rich!

[Dumak]

6. If the energy is coming from water mains pressure, then the energy

was initially supplied by whoever pumped the water up to a high enough elevation to create the pressure.

[NYC_SKP]

7. I thought that, too. Watch the video.

It uses and electric motors, spins the water, turbulence creates heat, claims more energy out than in.

Not very believable, but not something that relies on main pressure, apparently.

[TheWraith]

9. Turbulence, i.e. friction, comes out of the energy of the water pressure. nt

[Howzit]

8. In other words, free, as in stolen nt

[Kolesar]

10. Natural gas pipeline companies recover pressure at the final terminal

I am not sure what mechanism they use; I think they generate electricity with it.

[madokie]

11. Free in the sense that it is not being used

sure they are running pumps to presurize the water to get it to flow out of my shower head so I can wash my stinking ass but the energy they are capturing is otherwise going to waste. They are capturing the energy of the flowing of the water whose main purpose is like my afore mentioned use. The pressure remains pretty much the same on both sides of the water turbine so the cost of presurizing the water to make it flow is always there and it remains for the most part the same. What they are doing with this is getting some of that otherwise going to waste energy back. All the energy that can be captured by use of a dam and turbines from a stream cascading down the mountain side is being utilized in warming that water from the friction otherwise. There is neither energy made nor lost its all right there and its being used, this captures some of it.

[HamdenRice]

12. Actually viable some places like New York. It's actually renewable weather energy. I use it already.

I didn't even look at the video, but the concept works in some places, like New York City, but there are drawbacks. I should point out, that I already have one device that uses "free" energy from water pressure -- my high pressure, low flow flush toilet.

In New York City, our water comes from watersheds upstate in the mountains. While there are some pumps, mostly the water pressure we have is passive. It comes from the fact that the source of our water is hundreds of feet higher than here at sea level where we use it. The force of gravity of the water running down hill from upstate to New York is what creates the water pressure here in the city.

That energy was put into the system by the weather. In other words, sunlight raised the water into the clouds and it rained down on the mountains upstate where that weather energy was stored.

We could withdraw some of that energy in the mains, but the cost would be that we would have lower water pressure in our homes. On the other hand, we do use that energy in low volume, high pressure flush toilets that store energy in the toilet tank between flushes.

Even in places that don't have mostly passive gravity based water delivery like we do, you could think of taking that water main energy as "energy recovery." Many water jurisdictions use energy to pump ground water up into water towers. Then gravity creates water pressure in the mains. To the extent that some of that pressure isn't needed for delivery into the homes, that energy could be recovered, but again at the cost of reduced pressure to the consumer.

On edit: After seeing the video, it's clear that the idea of free energy is not possible. But the idea asked about in the OP -- whether we can get energy from water main pressure -- is viable.

[ProgressiveProfessor]

13. Its total bunk