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parabolic solar heater | 12 comments (12 topical, editorial)

Re: parabolic solar heater (3.00 / 0) (#3)
by johnlm on Thu Sep 6th, 2007 at 04:52:03 PM MST
(User Info)

I don't mean to sound amazed here but something is wrong with your numbers.

You have about 35 square feet of collector, and if you were able to convert all 35 sq ft of sunshine at 100 % effeciency you would only be able to collect 300 BTU / Hr per sq ft. or about 10,562 BTU per hr total. That would raise about 10,000 pounds of water 1 degree F in one hour. 10,000 lbs of water is 1272 gallons. Either your numbers are of by 10X or you got alot of heating just by having the ambient temp heat the pool of water.

Nice looking collectors by the way.

Johnlm

[ Parent ]

Re: parabolic solar heater (3.00 / 0) (#5)
by richhagen (richhagen (a t) Juno.com) on Thu Sep 6th, 2007 at 05:34:01 PM MST
(User Info)

I thought about that too. He's got about 4 square meters in the collector give or take, so about 4000 Watts in full sun even if he could collect all of it. That's not enough to heat it that fast, but the sun would also have been shining on the pool at a 1000 W/square meter too, a percentage of which would be absorbed, in addition to any conduction from a warmer environment. Rich
'A Joule saved is a Joule made'
[ Parent ]

parabolic solar heater | 12 comments (12 topical, 0 editorial)

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