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Highway wind turbines to capture energy from passing vehicles

Discussion in 'Energy, Environment, and Policy' started by TEG, Sep 6, 2011.

  1. TEG

    TEG TMC Moderator

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  2. efxjim

    efxjim Member

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    At least the bird will not be waiting to target your freshly waxed Tesla.
     
  3. vfx

    vfx Well-Known Member

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    Though you maye nd up with it's head on your windshield.
     
  4. dpeilow

    dpeilow Moderator

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    These type of turbines work well as vertical axis because the wind can blow from any directions. Here it's only when blowing along the highway. What are they intending, to capture the air displaced from passing trucks?
     
  5. doug

    doug Administrator / Head Moderator

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    That picture is at least a few years old. As I recall, it was some student project and yeah, the idea was to recapture energy from passing traffic.
     
  6. TEG

    TEG TMC Moderator

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    #6 TEG, Sep 12, 2011
    Last edited by a moderator: Mar 13, 2016
  7. Norbert

    Norbert TSLA will win

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    Won't that increase the air resistance for the passing vehicles, by keeping the air from flowing along with the cars?
     
  8. zack

    zack Member

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    I'd love to see an explanation for what happens (drafting-wise) when you suck up the wind energy on one side of a large truck.
     
  9. TEG

    TEG TMC Moderator

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    #9 TEG, Sep 12, 2011
    Last edited by a moderator: Mar 13, 2016

     
  10. vfx

    vfx Well-Known Member

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    Yeah. seems to me that it would take more gasoline.
     
  11. zack

    zack Member

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    And weird tire wear. Seems like you'd have to pull to one side all the time. i dunno... it's pretty curious. I'm amazed at how well drafting works in the Tesla. I can see an instantaneous improvement... my real range indicator freezes at first, then slowly starts to climb after a few minutes of careful drafting, even in highly hilly environments where the semi or bus is changing speeds all the time and I'm constantly reacting to that.
     
  12. TEG

    TEG TMC Moderator

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    You think drafting is good in a Roadster? Try driving a Ford RangerEV with a big camper shell on it. It is like driving a brick into the wind. Get behind a big truck and it feels like a turbo kicked in.
    (Well, I am exaggerating a bit, but you can feel the difference.)
     
  13. VolkerP

    VolkerP EU Model S P-37

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    For a racing ICE, drafting cuts off a fair amount of air flow required to cool the engine. For EV it is perfect. Would like to have my Model S with an automated "draft behind Audi Q7" mode.
     
  14. doug

    doug Administrator / Head Moderator

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    Ok, stay on topic. Discussion of drafting is here: Drafting
     
  15. doug

    doug Administrator / Head Moderator

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    #15 doug, Sep 13, 2011
    Last edited by a moderator: Mar 13, 2016
    I feel the same about this as I do about many "wouldn't that be cool" ideas (cf. Solar Trees, solar roads, power generating speedbumpbs, etc). I haven't done the engineering work, nor a proper efficiency or cost analysis, but it seems to me that you'd be better off using whatever resources you'd spend here on more conventional installations. I.e., just putting up wind turbines where the wind blows (solar panels on rooftops, etc). Once you have all the easy wind and solar, then you pursue these diminishing-returns schemes.
     
  16. vfx

    vfx Well-Known Member

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    And again, I can't help but think "there's no free lunch" I suppose if a speed bump it there anyway to slow down a driver then having it create energy is a good thing but if it takes energy to push a truck down the road through the air, does not objects like turbine blades near enough to use that displaced air energy add more drag to the truck make them move?
     
  17. TEG

    TEG TMC Moderator

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    I suppose they could use those turbines to power under road induction to recharge EVs.
    But I wouldn't want to blow a tire and slam into one of those airflow directing walls.
     
  18. zack

    zack Member

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    If the presence of those turbines reduces the drag forces resulting from turbulence behind the vehicle, there's a net gain for the vehicle. In that case, this isn't a "free lunch" question... it's more about comparing it to drafting, where the vehicle behind the truck improves mileage for both of them. Drafting does seem like "free lunch" but it's all about the serious inefficiency of a single vehicle going down the road vs a train of them holding open a tunnel in the atmosphere.
     
  19. doug

    doug Administrator / Head Moderator

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    Spun this thread out on it's own since it was detracting from the general Wind News thread.
     
  20. vfx

    vfx Well-Known Member

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    Yeah, I'm thinking it addds drag. Honestly I don't know.


    Someone call Adam and Jamie.
     

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