[Greenbuilding] Greenbuilding Digest, Vol 11, Issue 18

[Keith Winston]

On Fri, Jul 29, 2011 at 3:00 PM, <
greenbuilding-request at lists.bioenergylists.org> wrote:

> >> His panels are attached to a 12 metre (40 ft) long horizontal pipe
> >> oriented with it's long axis running North-South, suspended about 3
> >> metres
> >> (10 ft) off of the ground.
> >>
> >> The pipe rotates to follow the arc of the sun over the course of the
> >> day.
> >>
> >
> > I'm trying to visualize this array. Does the North end of the pipe angle
> > up by XY degrees? Or are the individual panels tilted up?
> > Is the array 2x26 panels (I got that from the first graphic found at the
> > Enphase link)?
> > Does the XY angle above change over the course of the year?
>

Just for reference: normally on single-axis tracking collector systems, the
axis is E-W, not N-S. Are you CERTAIN it's N-S? Also, single-axis is
generally good for more like 20% performance improvement, not 30-40%. But at
those far north latitudes it may be that my rules of thumb suck (terrible
pun on thumb-sucking, for those who missed it).

K
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