battery-less VAWT [RE-wrenches]

[Kelly Keilwitz]

Wilco,
I wasn't aware of this outfit, thanks. Their "testing" facility in Kelowna,
BC is ~ 5 hours from us - in fact I was through there last week.

However, the first availability was stated as August, 2007 and they're
marketing it as roof-top mounted. I'd like to know that one of those 300-lb,
64 s.f. spinning objects has stayed up and operational on someone's roof (in
a windy spot) for a few years before I recommend it to a customer.

Rooftop mounting, even if the turbine stays up, and doesn't vibrate, still
is missing the main point: there just isn't much fuel there. The cost of a
tower can be justified simply by Energy ~= velocity cubed.

-Kelly
Kelly Keilwitz, P.E.
Whidbey Sun & Wind, LLC
Renewable Energy Systems
NABCEP Certified PV Installer
987 Wanamaker Rd, 
Coupeville, WA 98239
PH & FAX 360-678-7131
sunwind at whidbeysunwind.com



On 2/1/08 8:51 PM, "Wilco Vercoelen" <w.vercoelen at dommelvalley.ca> wrote:

> 
> 
> Have you guys looked at Windterra http://www.windterra.com/
> It is a fairly new Canadian 1.2kW direct grid-tie VAWT, but based on the
> specs and pricing we think it has its own place in the market. We do not see
> it as an alternative to a horizontal wind turbine but rather as a type that
> can be used under certain circumstances, e.g. higher rise buildings.
> We know that for example the Dutch Grid-Tie Turby (European market) is
> pretty effective and well developed, but again in its own little place in
> the market. We believe that the majority of turbines will be horizontal, now
> and in the future, but that doesn't mean that a well-tested vertical turbine
> with actual good field test results and certifications can be a solution
> under certain conditions. Unfortunately there aren't many out there, yet....
> 
> Wilco Vercoelen
> Dommelvalley Green Power
> Utopia, Ontario
> 


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