Roy Spencer’s Swimming Pool
This is what happens when a climate scientist engages in a little DIY solar pool heating project:
Since the area of each of the two collectors is about 1.5 sq. meters, this means about 800 Watts per sq. meter of heat flux was being usefully generated by the collectors. I’m guestimating that this would be about 80% efficiency, assuming about 1,000 Watts per sq. meter is falling on my collectors at this time. (The sun’s elevation in the sky was approaching 65 degrees at this time, and I had the collectors tilted toward the sun at about 15 degrees.) By the way, none of the numbers I have come up are here meant to be very accurate.
You can find out how well his design works on drroyspencer.com.
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