Greetings Dr. Yuji Ohya,



I have seen some reports on your development of a "wind lens" to increase the power generation of wind turbines. Fascinating work! In your paper, I noticed that you listed on only one negative aspect of the development:[1]
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(5) As for demerits, wind load to a wind turbine and structural weight are increased.
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I wanted to inquire as to whether you foresee any additional difficulties with respect to scaling this device. For instance:
- Does your system require particularly high rpms, and if so, might these be difficult to attain with a device larger than your lab-scale device?

- Have any simulations or experiments been conducted to predict the energy gains at an industrial sized wind turbine size? In other words, if you are achieving an X% increase over bare wind turbines for your 1m size, what power gains would be predicted for the final size? (Or should these gains remain fairly constant?)

Many thanks for any response you can provide.


Best regards,
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[1] Ohya Y., Karasudani T. A Shrouded Wind Turbine Generating High Output Power with Wind-lens Technology. Energies. 2010; 3(4):634-649.