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An A-frame solar water heater concept - Page 5

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Posted by News on July 26, 2005, 5:57 pm


England in the tropics?  Well if it stays below freezing all day, it is a
very cold day.   In Winter, dropping below freezing during the night is

Well the UKs most northerly part, is further north than the most southerly
point of Greenland.  The most southerly, the Scillies, never gets frost.  We
will be quite mild, yet on that same latitude where polar bears roam in
other parts.

Posted by Derek Broughton on July 26, 2005, 6:20 pm
News wrote:

Note the smiley...  You are, in fact, almost 7 degrees north of me. I was
born in London, I know the temperature difference.

Posted by News on July 23, 2005, 1:09 pm

Say a 20 foot length of this 4" plastic pipe running under the roof apex in
the attic.  Say, 20C in the attic and water inside, coming in from the water
mains at 5C, who long to raise the mass of water to 20C?

How much are you going to gain from solar heat?  It may take a while to
payback the cost of the pipe and fitting.

Just out of interest.

Posted by nicksanspam on July 22, 2005, 7:31 pm

Since you ask, I'll comment. The pond above is much more efficient than
a pipe in the attic, and it's a draindown system with no exposed water
to freeze at night.

Just hot water for showers. The "special greenhouse" might cost $00.

What does that mean?

That might happen north of the Arctic circle :-)

Unpretentious is nice :-)

The staff of the b?

Vegetable gardens don't reflect much sun...

...6 is the garden? Looks like your ascii art got corrupted.

Attwood's $0 pumps have a 3 year guarantee and a 600 hour lifetime.

Nice, altho this requires more pump power than a horizontal pond above
a tank with a spiral pipe heat exchanger in the bottom which leaves
the water level of the supply and return pipes just below the pond when
the pump isn't running. What would you use for a pump and a tank, vs
a $8 EZ-set setup?

Nice. You might turn the pump on with Grainger's $ 2E247 snap-disc
thermostat in a 1 liter soda bottle (closed above 130 F and open below
115) and turn it off with Grainger's $0 2E365 thermostat (closed below
120 and open above 140) sensing the water temp, if you plan to use a
pressurized flat PE pipe spiral as the cold water heat exchanger.

You might pressurize the hot water, unless you live in the basement.

Sounds like work. You mightr say more about this compost process.
I did address the cloudy and short days, using actual numbers :-)

Same for the A-frame, with most of the water on the ground.

Sounds familiar.

"Work!" -- Maynard G. Krebs

I disagree.


Posted by George Ghio on July 22, 2005, 10:41 pm

nicksanspam@ece.villanova.edu wrote:

  The simple solution Nick. Build it. Collect the real data from use.
Compare data to your theory.

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