| While a dry collector may heat up to 700+F degrees fairly quickly,
| adding water will absorb the heat fairly quickly. It's a lot like
| pouring water into a hot pan on the stove. You may get a hiss of
| steam with the first few drops, but before you've added a cup
| you'll find that the water isn't boiling and you have to wait for
| it to heat up. Of course if you have a really-really hot stove, or
| a really really big solar collector you might bring that water to a
| boil immediatly... but I don't think that's what the original
| poster was talking about.
Steve, thank you! You're absolutely right - I have no idea what I was
thinking. A trough with a 4x8 capture area can't provide any more heat
than a 4x8 flat panel.
Duber, my apologies.
DeSoto, Iowa USA
yes the simple would be best. (i think)
this forum has some dam good eng's,
so thanks for the help