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Solar thermal array calculations

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Posted by Keith D on July 2, 2006, 10:42 pm
 
Is there a rule for calculating the size of the solar array I would require
for heating water (i.e. number of people in house etc) and for the size of
the collector tank (solar thermal tank)



Posted by Jeff on July 3, 2006, 12:13 am
 
Keith D wrote:


Others more knowledgeable will hopefully reply, but in the meantime...

   The figure I keep seeing is 15 to 20 square feet of collector per
person. This is enough to supply all (or almost all) hot water in the
sunny months and roughly half the other half of the year. 80 gallon
tanks seem to be popular. YMMV.

   Jeff

Posted by Brian Graham on July 26, 2006, 8:36 pm
 I have (2) 4x8 flat plate panels and only a 40 gallon solar water tank. My wife
recently did 4 loads of laundry one afternoon - we have 2 young kids. The pipes
were still too hot to touch after the last load.

Everyone should have SDHW!
--
Brian

Keith D wrote:


Others more knowledgeable will hopefully reply, but in the meantime...

   The figure I keep seeing is 15 to 20 square feet of collector per
person. This is enough to supply all (or almost all) hot water in the
sunny months and roughly half the other half of the year. 80 gallon
tanks seem to be popular. YMMV.

   Jeff



Posted by Solar Flare on July 4, 2006, 1:39 am
 Depends on your climate. I have heard 2m^2 per person will yeaild 80%.

The other 20% is next to nothing in December and Jan.



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