The sort version is you don't get something for nothing.
God no, not on the trains, and the turbine itself would be an upright one, the way that the blades are designed, they can accept airflow from any direction (at least in small scale tests). As for using more trains, no, they won't use more fuel. The air friction happens from the air head on and the vehicle moves and the air around the side causes drag, it is not generated from the side as it is in motion. If this was the case, a car would use dramatically more fuel when going through tunnels, car parks, country roads where there are a buildup of trees etc and this isn't the case.
I have put 18 months (around work and family commitments) of research into this, and so far, everything in my computer model testing and small scale prototype (10cmx5cmx5cm - without the electrical charging capacity) says I am on track for this (pardon the pun), and I am currently building a full scale prototype to test first.
Last edited by featured_spectre; 4th July 2013 at 10:56 AM.
Along with the wind that is naturally occurring, the residual energy from air friction as it leaves the train in motion generates the energy.
Hopefully sometime this month I should get my original grain watches that I helped fund. When I do get them I will post pics.
Even if the train uses more fuel as it goes past it's going to be an inconsequential amount.
I'm slightly worried that you say your calcs are not based on the turbines under load when generating.
When the full scale prototype is finished, I will be testing it in a wind tunnel with a local company near to me, which can generate wind variances as if a train/car/plane etc were going past. Will cost around £500 for the testing, but it will be invaluable. If I get the results I hope, then happy days, if not, the adjustments will be made.
Situation 1 : A train travels for 10 miles at 100mph. It uses X amount of energy. For convenience we measure that in joules.
Situation 2 : A train travels for 10 miles at 100mph. Every mile there are 10 turbines which collect y amount of energy per turbine, so in total Y=100*y total energy. The Train uses Z energy.
If the train does not provide the energy to the turbines then Z=X and Y comes from nowhere. You have just won the Nobel prize and saved mankind from a horrible fate frying in our own waste gasses. In fact Z=X+Y (ignoring that situation 2 will involve additional losses).
Before you spend £500 on a wind tunnel test, sign yourself up to Village of the Banned - All Discussions and give some details on your set-up. You might save yourself £500 and learn a lot in the process.
In terms of watts that it generated it was a total of 0.15W for 10 seconds of blowing.
Scaled to 1 minute this equates to 0.9W.
Scaled to 1 hour this equates to 54W.
Bare in mind that is if it has a constant flow of air.
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