Posted by Bert Menkveld on April 1, 2005, 11:23 pm
I got to see a presentation about this project last summer. Apparently it
was originally intended to be located in Southern Ontario (where I live),
where there is less cold but also much less sunshine in the winter.
Seasonal storage seems like the only way to get anywhere near 100% solar
heating in our climate, especially for existing older homes. Though this
project may look expensive, it will be interesting to see how well it
Posted by Kiyu on April 4, 2005, 5:13 am
On Fri, 1 Apr 2005 18:23:35 -0500, "Bert Menkveld" <bertATreentronicsDOTcom>
Do you have any details of how they will do the underground storage and how
much it will take per house?
Posted by News on April 4, 2005, 1:42 pm
"Bert Menkveld" <bertATreentronicsDOTcom> wrote in message
Apart from insulation over the earth to be heated from solar panels, what
other precautions are there to prevent heat from convecting to the
Posted by Bert Menkveld on April 7, 2005, 10:55 pm
The thermal storage encompasses a volume of soil 25m in diameter and 50m
deep (under the centrally located park). The way the heat is kept inside
this volume is simply through the limited thermal conductivity of the soil
itself. Obviously there will be significant heat loss through conduction,
but it's such a big volume that the loss is tolerable (amounts to less than
50% of the heat put in, but I don't remember how much less than 50%).
Looking at my notes, I see they figured the thermal conductivity of the soil
is 2.11W/mK, so you can try to do some figuring yourself if you're so
Posted by Cosmopolite on April 2, 2005, 2:16 am
Well, Nick, if the rest of your data is as accurate as your
climatological data for Edmonton, then you should put it into
the nearest dumpster and start over.