Interesting! Don't you get a fair amount of turbulence from the trees?
Nevertheless the originality of the approach to the air stream concentration, some disadvantages of this idea should be mentioned.
First of all it concerns the problems of arable lands exclusion as well as making artificial barriers for agricultural machines. You have noted that it will take much time to realize the given idea. But of greatest importance is that the air stream formed by wind dam is accelerated in the near-surface region having low wind velocities, and the trees can contribute to stream turbulence in the created corridor. As a result the wind station receive rather disturbed stream which can influence its dynamical durability.
This proposal requires a series of theoretical and experimental studies. After submission of the results obtained to the State Research Institute of Renewable Energetics and Electrical Engineering we can consider also the commercial aspect of your proposal.
Director of State Research Institute of Renewable Energetics and Electrical Engineering (Kyiv)
Tel: +38(044) 221-46-04
I appreciate your enquiry, but I am not convinced that it would be effective.
In my experience the wind is a Gentleman, rather than quarrel he would rather go around. I imagine the trees of your "wind dam" will form a pressure wave that will cause the faster moving air to go higher, unless wind speeds are already high, when it wouldn't be needed in any case.
However, good luck with it, measurements will be the final say.
Advanced Wind Technologies
Our organization is ready to consider and discuss variants of collaboration in projects on construction and exploitation of wind dams.
We are ready to consider the problem of joint production.
Potemkin Vladimir Vladimirovich,
Director of NPP "Intellect" (Mariupol)
As the owner of many utility-size wind turbines, I can say that your idea has considerable merit.
While new turbine installations are on taller towers, thousands of older turbines are on towers which could benefit from a wind dam, where it properly designed. The wind dam might well be less than the cost of new towers. Further, I think it likely that the Darrieus, Savonius, and other ground-mounted designs should benefit.
Turbines installed in wind flow systems such as the Altamont Pass, CA., and the Delaware MTS., Texas, could benefit, since the wind velocity at these locations is often highest at ground level.
Finally, wind dams might benefit owners of small turbines on shorter towers, especially in marginal areas.
Please keep us informed of your progress.
David M. Reavis
Powerline Energy Corp.
Although the concept is original and sound, we are not able to participate because we do not foresee application in Western Europe - our main market. To date a typical wind turbine in Europe has a hub height of 40 m or more. To operate efficiently, as a minimum a wind dam should have a vertical scale of the order of 40 m as well, and a horizontal scale exceeding this value. I'm not an expert on trees, but think this tree size cannot be realised in the course of a wind farm project with a typical duration of 20 years. So we do not consider this practical. The same goes for an artificial wind dam - a structure with basically the same dimensions - which would meet fierce opposition in the planning procedure in Europe.
On the other hand, the idea might be realistic for wind turbines with a hub height smaller than the vertical size of the wind dam.
Ir. H.J.M. Beurskens
ECN - Solar & Wind Energy
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