Friday, July 31, 2009

July Performance for the $1K Solar Water Heating System

The $1000 Solar Water Heating System has been in operation for nearly a year now.  I've been logging the tank, collector, and ambient temperatures and posting the plots of these temperatures at the end of each month.

So, here is the July one:

As you might expect for the middle of summer, the solar fraction was 100%.

This month was a test of the strategy to keep the stagnation temperatures within the limits of the PEX tube used in the collector, and it appeared to do OK with a maximum collector temperature of 195F.

More details on the $1K system...
Performance plots for the last 10 months...


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