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Wind Energy AIDED Car(LOCKED)
By goucho, Section Wind Posted on Fri Sep 12th, 2008 at 06:22:34 PM MST
Wind Energy AIDED Car

OK, let me start out by saying that I am NOT trying to break the laws of Physics by building a perpetual motion machine. The idea that i'm thinking of is placing a small wind turbine (in the form of a jet turbine) into an electric car to produce energy that will allow for a longer trip between charges.
Right now I am trying to figure out if the increased drag will out weigh the energy produced. The question I have is as follows:
Is there anyplace that I can find the Coefficient of Drag (Cd) for a typical wind turbine blade at roughly 55 mph?
I know there are a LOT of factors that play a part in this, but is there any way to roughly find this out. Any ideas of where to find this (besides using any CFD programs or wind tunnel testing, which i do not have access to)? Or does anyone know any other forums that I could post this in? Thanks for your help!
obvious reasons, no overunity allowed
Kurt

Wind Energy AIDED Car(LOCKED) | 1 comment (1 topical, 0 editorial)

Re: Wind Energy AIDED Car (3.00 / 0) (#1)
by richhagen (richhagen (a t) Juno.com) on Fri Sep 12th, 2008 at 01:25:07 PM MST
(User Info)

Yes, it will. The first law of thermodynamics - conservation of energy - means that you will not get more power out than the power put in. Since you won't be 100% efficient in your energy conversion you will do much worse - reference Betz's theorum for wind turbines and add to that the innefficiencies of converting your stored chemical energy in the batteries into kinetic energy. In other words there will be more energy lost from the added drag than you can generate with your turbine and your range will in fact be decreased. If you can do better you will do something no one else has ever been observed to do in a reproducible experiment and should be the hands down winner of a Nobel Prize. Not meaning to rain on your parade, but you are wasting your time with this idea. Rich
'A Joule saved is a Joule made'

Wind Energy AIDED Car(LOCKED) | 1 comment (1 topical, 0 editorial)

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