« OzTREKK University of Queensland, Australia, Medical School Medical School Rankings
Baba Ramdev -Yoga for High Blood Pressure (Uchch Rakt Chaap) »

VERTICAL AXIS WIND TURBINE WINDMILL ALTERNATIVE GREEN POWER

http://www.greenpowerscience.com/
A simple wind turbine all around you.

Alternative energy green job training. Wind power.

Duration : 0:3:16


Technorati Tags: , , , , , , , , , , , , , , , , , , , , , , ,

This entry was posted on Sunday, February 21st, 2010 at 9:16 pm and is filed under alternative. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

25 Responses to “VERTICAL AXIS WIND TURBINE WINDMILL ALTERNATIVE GREEN POWER”

  1. easy now mr …
    easy now mr invisible particle, one day you will love and seek for the normaility again, but i know you gotta go down there from event hahahahaha. thoose who don´t have that need live i am dead at least inside. there is now escape from hardcore gravity.

  2. Hey ike, why are …
    Hey ike, why are you taking the time to tell people what they Can’t do….you are using a very small % of you power, for the wrong reason…Don’t show off with your Hands off math ! Do something good, we both know you are more than a grumpy old man ? The world is NOT flat, & they can Now grow new body parts in a lab. That math will lock you down, and removes chance. Don’t close any doors ! CRAFTS !? Thanks ike. Keep trying EVERYONE ! :>)

  3. powdermonkey1111 on February 21st, 2010 at 9:16 pm

    Why is Everyone …
    Why is Everyone kicking on Ike and giving him thumbs down for stating the mathematics behind why this really isn’t that great of a model of wind power generation? I mean aren’t these things designed to suck air into the center from all sides? I personally don’t know much about then, but from the fact they are referred to as “blowers” and looking at their design that is a far different usage than being spun by a single directional wind. It pretty much throws away the mechanical usage that it had.

  4. Ok, last piece of …
    Ok, last piece of rant.

    You want to make something without understanding the underlying principles…try crafts, because you will not be successful at science, engineering or inventing, and certainly not at “green power”.

  5. In other words, why …
    In other words, why would you vote down a logical, mathematical analysis? Whether you do the analysis or not, you are engineering something when you build one…and the great majority of successful engineering projects are analyzed first using mathematical models. You can’t say if something will work for sure but you can usually rule things out. Optimization is huge also. It’s one thing to get a tiny 12v bulb to light, something else to make useful power. The difference is analysis.

  6. …see this turbine …
    …see this turbine spinning at a paltry 170 rpm. There’s branches waving all over the place yet this thing can barely overcome the friction in it’s one bearing (see 2:10). It’s not driving a load, the only load is friction! There are so many hints in this vid that this approach is a waste of time.

    Why is it that when talking about “green power” as soon as you throw out some math – the same stuff that is used on the big MW turbines – you get a minus score?

  7. “you math people …
    “you math people are so smart” maybe. There’s not much math up there. A couple of unit conversions, maybe a trivial amount of algebra. I’ve only looked at this because I want to build a VAWT. I think wind power could be useful to me in a grid-tied setting. There are VAWT units out there producing renewable power right now, this blower rig-job just isn’t a very good way to do it.

    I do the math to see if an approach is worth trying. With a serious breeze in the background I can see this…

  8. Realistic …
    Realistic assumptions:
    Wind is 11 mph.
    Turbine efficiency is 35% (the huge MW wind turbines are about here).
    DC generator efficiency 60%.
    Converter? Not really sure – lets just say it’s still less than the number I’m about to give you…

    32w * (11/20)^3 * .35 * .60 = 1.1 watt
    So 10 strung together might just barely light a standard CFL. I would be surprised if you could even get that much out – as it’s loaded the generator will slow decreasing its efficiency more.

  9. Pw = 0.5 * 1.23 * …
    Pw = 0.5 * 1.23 * 0.075 * 8.9^3 = 32 watts of wind power.
    A really smart guy named Albert Betz (a wind energy expert from Germany) figured the best possible wind turbine efficiency is 59%. The best possible electrical generator efficiency is about 80% (if you use 3 phase AC – good luck finding one of these at this power level!).

    32w * .80 * .59 = 15.3 watts. This is about as much of a best case analysis you could imagine. If you had a 100% efficient converter you could light a standard CFL.

  10. …continued for …
    …continued for krrrr….
    Savonious, height is 1ft and diameter is 1ft. Blade area is circ * height * 0.25 = pi*d*h*0.25
    0.25 because air acts on only one quarter of the blades at a time (others are either blocked by blades being acted on or are returning and therefore spinning towards the wind in a Savonious).
    Neglect air friction from returning blades.
    1 meter = 39 in & 1ft = 0.31m.
    Ab = pi * 0.31 * 0.31 * 0.25 = 0.075 sq meters

  11. @krrrr….

    Sure, …
    @krrrr….

    Sure, it could turn a very small generator.
    Pw = 0.5 * Da * Ab * Vwind^3
    Pw = power of wind in Watts
    Da = air density (1.23 Kg/m^3 at sea level)
    Ab = area of blades in sq meters
    Vwind = wind velocity in m/sec

    Assumptions:
    At sea level.
    Wind is 20mph average (this is super windy, 10-12 is a better estimate but I’m humoring you) or 8.9m/sec on average.
    Blade area – this is a little rougher to get. Assume your turbine is savonious – air is pushing the blades…

  12. krrrruptidsoless on February 21st, 2010 at 9:16 pm

    @ikedasquid
    So …
    @ikedasquid
    So your saying these could turn extremely small generators.
    And a bunch of these linked to a storage source could actually work.
    Good job.
    So 10 small generators from 10 seperate blower fans could produce how much exactly?
    And that would be able to charge or make how much power?
    You math people are soo smart.

  13. Vertical Wind …
    Vertical Wind Turbines do show promise. However the example of the blower fan is not a good comparison.
    It shows a concept but not a proper power generating design.
    It’s much like a prop on a boat.
    When the prop is used for powering the boat it works fine, but if the boat is dragged through the water (as on a sailboat) it doesn’t give back near the power.
    It has to be designed differently to do so, the same with this concept. But it CAN be done and it’s not junk.

  14. It’s called POWER. …
    It’s called POWER. No arrangement of gears will increase power (gears induce friction, lowering power). Efficient generators turn quickly, and for wind generators this is faster than the turbine spins.

    This lowers torque to the generator.

    P = T * w (power=torque * angular velocity)
    If the gear train turns the generator faster than the turbine, causing w to go up, T must come down to keep P constant.

    P in KW, T in N*M, w in RPM
    P=T*w*2pi/60
    P in HP, T in Ft*lbf, w in RPM
    P=T*w/5252

    JUNK!

  15. @ikedasquid Its …
    @ikedasquid Its called gearing…..proper gearing is what makes any wind turbine work. They other wise don’t produce enough torque to spin a generator properly

  16. 100 mph???? are you …
    100 mph???? are you crazy?? thats totally shaking ….unballanced….the strong vibes will destroy it….

  17. Overall, I like …
    Overall, I like this channel…but this vid is horrible.

    Types of centrifugal blowers like these are a cheap & inefficient way to move air. When freewheeling like this they are savonius turbines with poorly shaped blades.

    A connected generator will produce a force opposite that produced by the wind. Generating more power increases this force. If you can stop the turbine with your hand (like you can here) you can only produce as much power as you could produce with a hand crank!

    JUNK!

  18. 68plymouthmuscle on February 21st, 2010 at 9:16 pm

    Cool idea I love …
    Cool idea I love your video!

  19. Thanks for sharing …
    Thanks for sharing this. Other commenters are right, these ideas have been in use for ages and they are not dependent on having the latest technology. So, you have to wonder why, for some people, these concepts are on the verge of magic? I truly believe it’s because generations have been systematically “dumbed down”. Pleease keep the vids coming. You are forcing people to think.

  20. you use a dynamo.
    you use a dynamo.

  21. Dan, I’ve NEVER …
    Dan, I’ve NEVER criticized your wonderful work here, my friend, but … how about just using some nice classical guitar or something mellow … please? Thanks, Dan!

  22. were to fat and …
    were to fat and lazy to maintain them

  23. my brain is now …
    my brain is now dripping out my ear after that commentary

  24. @sev07pass All you …
    @sev07pass All you need to make electricity is to move a magnetic field near a copper wire. So, if you glue magnets on the side ot her wind fan thing, and put a plastic spacer on the axel and, say , a frisbee that has some copper wire coils mounted in it..and make the spacer so that the fan side is close to, but doesn’t touch the frisbee coils – poof – you have a windpowered electricity generator. No gears are needed.Hook the 2 wire ends from the frisbee to a battery to harness the power.

  25. So if you ever want …
    So if you ever want to turn on a light bulb on a day when the wind is howling, and you have a long standing hatred of birds, there is a green alternative at your nearest junk yard!

Leave a Reply