Tracker efficiencies - generalized [RE-wrenches]
Windy Dankoff, Dankoff Solar
windy at dankoffsolar.com
Thu Mar 21 17:02:58 PST 2002
<x-flowed>
>.... Personally, I've about
>had it w/trackers. I'm willing to work on mine all of the time but my
>clients are at their wits end.
>
>Jeff Oldham
Jeff,
Are you including Zomeworks passive trackers in the above statement?
That would be very surprising. They are extremely durable in my
experience. You replace a shock absorber or two every 5 years or so.
Leakage of the working fluid is pretty rare and can be fixed by
replacing the cannister assembly.
UNIRack now has a passive tracker on the same principle.
To estimate the gain from passive tracking, you need to take the
theoretical data you might get from NREL, and subtract a factor for
less accuracy, less range of motion, morning wake-up delay, and
occasional wind-shift. I would guess it's about 15% less gain.
We sell lots of passive trackers for water pumping systems, only
discouraging their use in extreme wind areas or extremely turbulent
sites.
Windy
- - - -
To send a message: RE-wrenches at topica.com
Archive of previous messages: http://www.topica.com/lists/RE-wrenches/
List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm
Check out participant bios: www.mrsharkey.com/wrenches/index.html
Hosted by Home Power magazine
Moderator: michael.welch at homepower.com
==^================================================================
This email was sent to: michael.welch at homepower.com
EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9
Or send an email to: RE-wrenches-unsubscribe at topica.com
T O P I C A -- Register now to manage your mail!
http://www.topica.com/partner/tag02/register
==^================================================================
</x-flowed>
More information about the RE-wrenches
mailing list