Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - remove the alternator and installing it on the front of the car

noeryan · 02-05-2009, 02:58 AM

Hey, instead of relating you somewhere else, I'll try to explain how this video is a hoax.

In modern physics, energy is not created or destroyed. Also, for every action, there is an equal and opposite reaction. **Remember these laws**

Also, since we are human, we can not produce many devices that work 100% efficiently... in fact, we do good to push 50% efficiency in most. Most modern, large, complex wind turbines max out around 35% efficient. This is using control systems for proper AoA (angle of attack), yawing, expensive generator systems, etc.

Since we know that energy isn't created or destroyed, how do the turbines extract energy from the wind? By converting some of the kinetic energy of the wind into mechanical energy then to electrical energy that is useful.

What does converting the kinetic energy of the wind really mean? It means the fast air is pushing on the blades... this pushing is called dynamic pressure. **This pressure is pushing the car backwards.** Using this pressure, the blades spin and create electricity.

How do you overcome this pressure? By applying the same amount of pressure in the forward direction. This pressure is produced by the engine. Since our engine is running off of pressure pushing the car backwards and the engine is producing a pressure forwards to counteract it, if the entire system was 100% efficient it wouldn't move or it would be accelerated to a certain velocity by an outside source and then would kick in and maintain that velocity but could never accelerate faster.

HOWEVER, like I stated earlier, we are doing good to get 50% efficiency most of the time so if this were our case, we would be pushing with half of the pressure that is getting pushed on by the turbines which means we would quickly decelerate to a stop.

That might be over complicated sounding and actually a pretty poor explanation of the subject. How about just trusting that the power obtained by the turbines is a lot less than the power it takes to push them at that velocity.

Youtube.com should have a 'B/S' tag on it to help with the ridiculous videos that get posted by scam artists.

02-05-2009, 02:58 AM	#15 (permalink)
noeryan EcoModding Lurker Join Date: Feb 2009 Location: Alabama Posts: 62 Black Fit - '08 Honda Fit Sport Thanks: 0 Thanked 0 Times in 0 Posts	Hey, instead of relating you somewhere else, I'll try to explain how this video is a hoax. In modern physics, energy is not created or destroyed. Also, for every action, there is an equal and opposite reaction. Remember these laws Also, since we are human, we can not produce many devices that work 100% efficiently... in fact, we do good to push 50% efficiency in most. Most modern, large, complex wind turbines max out around 35% efficient. This is using control systems for proper AoA (angle of attack), yawing, expensive generator systems, etc. Since we know that energy isn't created or destroyed, how do the turbines extract energy from the wind? By converting some of the kinetic energy of the wind into mechanical energy then to electrical energy that is useful. What does converting the kinetic energy of the wind really mean? It means the fast air is pushing on the blades... this pushing is called dynamic pressure. This pressure is pushing the car backwards. Using this pressure, the blades spin and create electricity. How do you overcome this pressure? By applying the same amount of pressure in the forward direction. This pressure is produced by the engine. Since our engine is running off of pressure pushing the car backwards and the engine is producing a pressure forwards to counteract it, if the entire system was 100% efficient it wouldn't move or it would be accelerated to a certain velocity by an outside source and then would kick in and maintain that velocity but could never accelerate faster. HOWEVER, like I stated earlier, we are doing good to get 50% efficiency most of the time so if this were our case, we would be pushing with half of the pressure that is getting pushed on by the turbines which means we would quickly decelerate to a stop. That might be over complicated sounding and actually a pretty poor explanation of the subject. How about just trusting that the power obtained by the turbines is a lot less than the power it takes to push them at that velocity. Youtube.com should have a 'B/S' tag on it to help with the ridiculous videos that get posted by scam artists.