battery-less VAWT [RE-wrenches]

[Kelly Keilwitz]

Wrenches,

After starting this thread, doing research on the subject and hearing back
from wind Wrenches here is my response regarding the RFQ & design to combine
multiple VAWT's along with a 40 KW PV array on a commercial rooftop in the
Seattle area:

"... I¹ve spent considerable time looking into the current state of vertical
axis wind turbine (VAWT) availability, reliability, appropriateness, and
grid-tied options. As a result I cannot recommend using VAWT¹s in your
project. In summary, VAWT¹s mounted on the facility roof will be expensive
spinning art, that will likely incur high maintenance costs, could transmit
harmonic vibration, and could pose a liability hazard. VAWT¹s will only
produce reasonable energy output in high (storm) winds, which don¹t occur
often enough to generate much energy. There are very few installations in
the US, and no long-term installations that have stood the test of time.
Most VAWT manufacturers have not been in business long, which doesn¹t give
much comfort in depending on a warranty for backup. There are no direct
grid-connected VAWT models, and most are designed for 12 & 24-volt battery
systems (which means quite big conductors for voltage drop). Most
importantly, the available wind resource at the site at roof-top level will
almost certainly not be sufficient to justify wind power.

As an experienced consultant in the Renewable Energy Industry I feel that
it¹s my duty to recommend and demonstrate real, sustainable solutions for
energy production. I cannot conscionably recommend, design or install VAWT¹s
at the site, when the budget for wind would be more effectively, and
appropriately applied to the PV system."


The response from our EE contact at the project architectural-mechanical
design firm was positive and appreciative.

-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 1/25/08 2:34 PM, "Matt Tritt" <solarone at charter.net> wrote:

> 
>  From recent info on PacWind, it looks like they're pretty much out of
> business, at least for the time being.
> 
> Now why does that not seem to be a huge surprise?
> 
> Matt
> 
> Nik Ponzio wrote:
> 
>> Take 2:
>> 
>> We have also been looking for a reputable VAWT and I can confirm that
>> the PacWind machines (both Delta models) are only available in battery
>> charging mode. The specs on the Delta 1 show 0-190VDC output but Dave
>> in Tech Support says a battery-less option is still forthcoming....
>> 
>> 
>>  


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