Hybrid Car – More Fun with Less Gas

how many sq ft of panel needed? - Page 2

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Posted by Sundug on November 4, 2007, 1:02 pm
 

Sorry, I thought you were asking about domestic hot water use. Doug


Posted by DoHop on November 4, 2007, 7:11 pm
 


Posted by Jeff on November 6, 2007, 3:19 pm
 greif wrote:


How much does it take to heat now? Find the number of therms.

   You can find solar data here:

<URL: http://rredc.nrel.gov/solar/old_data/nsrdb/redbook/sum2/14898.txt  />

Figure roughly 45% efficiency. Less on really cold days and variable
depending on collector. A good evacuated tube will hold efficiency
better than a good flat plate.

Radiant heat is ideal for solar.

   Jeff


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