Alas, not another one…

I would appreciate it if these green fashionista inventors would AT LEAST do their research and learn from the mistakes of others. Case in point –the Portland, OR, USA Trimet Light Rail Station pole mounted small, kinetic architecture’ installation, er AKA Oregon Wind Revolution small wind turbine generators.

…will include 22 wind turbines mounted on top of the light-rail catenary poles. The turbines will provide 275 watts of power.

===> 12.5 watts per turbine. Who signs off on this kind of nonsense?!

You can’t read the rest of the aforementioned article, because it no longer exists. I wonder why…

And I have so many questions about this design:

  • Output voltage (VDC)?
  • Maximum wind speed  a single unit and wind tree can withstand?
  • Ballasting? How is this addressed for a veritable plethora of mounting scenarios? Roof parapet? Roof top? Near building?
  • What is the material of the rotor and blades?
  • Optimal gap between the blades?
  • Cp,max? [For a Hybrid = 0.24, this is the theoretical max power (called  Cp,max–maximum coefficient of power) available in the free stream of wind converted to mechanical power at the rotor axis for this configuration.]

As wind sage Paul Gipe said about this wind tree, “Darrieus himself would be embarrassed. c’est la vie.

The Oregon Wind Revolution [in the image below] is known as a Savonius design. The highest Cp,max [maximum coefficient of performance] is found w/a 2-bladed design w/a gap between the turning bodies of 0.1-0.15. Savonius rotor gap is higher than a drag-driven rotor, and uses high material.