Jump to content



Photo

Self sustainable vehicle

vehicle sustainable

  • Please log in to reply
19 replies to this topic

#16 Stetson

Stetson

    Neowinian Senior

  • 2,869 posts
  • Joined: 04-October 06

Posted 21 May 2012 - 23:53

Couldn't wind capturing systems work?


If you mean a stationary wind turbine that sends power the roller coaster or charges the battery of a parked car, then yes.

If you mean mounting a wind turbine on a car, then no. Just like with the generator, you will get less energy out of the wind turbine than it takes to move it through the air.

http://www.lghs.net/...PoweredSail.mov


#17 Mark

Mark

    (: ollǝɥ

  • 3,780 posts
  • Joined: 22-October 04
  • Location: Derbyshire, UK

Posted 21 May 2012 - 23:54

I'd love to see this car :shifty:

The best option at the moment for propelling anything is solar panels on light high flying aircraft which can fly high enough to get a constant supply of sunlight, and where air resistance is thinner.

Everything else loses energy. You only start with so much fuel with a full tank of petrol. When you start to move, some of it is converted to kinetic energy, causing the car to move. When it's used, that's it, it's lost. Well it isn't exactly, there are many ways it's let off, for example the wind caused by the car moving, the heat generated by the engine. Yes, you can capture some of it and charge a battery for a while but ever wonder why a car with a battery needs to be running for the battery to keep working? It's because it can only hold so much power and you're actually using some of that fuel to power the battery, even though it's being captured from the function of the engine in the first place.

#18 NitramX9X

NitramX9X

    Neowinian

  • 30 posts
  • Joined: 29-December 05
  • Location: Croatia

Posted 22 May 2012 - 01:06

If i remember correctly, an electric generator consists of two parts, one part the rotor which is spinning (because connected to the tires, wind turbine,...) and has a magnet attached on it and it creates and changing magnetic field, and a second part the stator which consists of a copper coil. The changing magnetic field creates an electric charge in the copper coil and that's how you get electricity . The thing is that electric current flowing thru a wire or coil creates a magnetic field the same way that a changing magnetic field creates electricity in a wire or coil and in case of a generator that new magnetic field is opposite of the first one and causes the rotor to slow down. That's why you won't get any surplus energy when you connect an motor to an generator, and only have an energy transfer minus the losses.

#19 Stetson

Stetson

    Neowinian Senior

  • 2,869 posts
  • Joined: 04-October 06

Posted 22 May 2012 - 01:32

If i remember correctly, an electric generator consists of two parts, one part the rotor which is spinning (because connected to the tires, wind turbine,...) and has a magnet attached on it and it creates and changing magnetic field, and a second part the stator which consists of a copper coil. The changing magnetic field creates an electric charge in the copper coil and that's how you get electricity . The thing is that electric current flowing thru a wire or coil creates a magnetic field the same way that a changing magnetic field creates electricity in a wire or coil and in case of a generator that new magnetic field is opposite of the first one and causes the rotor to slow down. That's why you won't get any surplus energy when you connect an motor to an generator, and only have an energy transfer minus the losses.


Yep, that's right.

If you took away the car part completely and had an electric motor hooked to a generator with the motor draining from a battery and the generator charging the same battery, it would run if you started it with the battery at full charge but the battery would eventually drain down and the motor would stop.

#20 Stetson

Stetson

    Neowinian Senior

  • 2,869 posts
  • Joined: 04-October 06

Posted 22 May 2012 - 03:26

Couldn't wind capturing systems work?

or

Using different sets of batteries. Have the the energy from the moving car charge the dead batteries while the car uses the batteries that powers the car.


The dead batteries would recharge at a slower rate than the motor would drain the other batteries. You would end up with less energy than you started with.

The difference between how much energy was in the motor batteries at the start and how much was in the generator batteries at the end would be equal to the amount of energy lost due to friction etc.