PSN-L Email List Message

Subject: Re: Not so simple photoelectrics, or are they?
From: mprice@........
Date: Tue, 29 May 2001 18:08:29 -0700

twleiper@........ wrote:
> [snip]
> other things, it tracked the Sun in order to maximize the
> yield. I built a photo-cell / optical system to do so with
> much experimentation, but ran into the challenge of the
> diffusion caused by overcast days, non-linear cell response
> and so forth. So then I added a "jog" cycle that would just
> reset the collector to due east every morning and then drive

There are commercial solar systems that achieve this by using a
fluid that is evaporated by sunlight resulting in a weight shift that
causes the panel to track the sun. As the fluid re-condenses after
sunset, the panel returns to the rest position facing east. Think
about those bobbing glass birds in cups of water for an analogy.

Mike Price

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Larry Cochrane <cochrane@..............>