by steam_cannon » Thu 20 Mar 2008, 21:06:57
$this->bbcode_second_pass_quote('BigTex', 'Y')ou may have seen these roof-mounted solar-powered attic ventilation fans.
Solar-powered attic fans are a great idea. Though I think he's given
this all some thought and is going with a vent tube or something to
just let the wind do the work.
$this->bbcode_second_pass_quote('BigTex', 'Y')ou know what, come to think of it, I wonder if you couldn't rig this
ventilation setup to also provide a kind of low volume passive air
exchanger between the interior of the above-ground dwelling and
the interior of the shelter to help the HVAC system of the dwelling
not work quite so hard during the day.
Regarding in cooling a building. He would probably want to limit
the amount of air going though his storage tube to keep condensation
to a minimum, so it probably wouldn't be a good idea. But similar
things have been done before.
$this->bbcode_second_pass_quote('', '[')b]earth cooling tube
Also known as an earth tube, a long, underground metal or plastic
pipe through which air is drawn. As air travels through the pipe it
gives up some of its heat to the soil, and enters the house as cooler air.
Potential problemsEarth cooling tubes are likely to perform poorly in hot, humid areas,
because the ground does not remain sufficiently cool at a
reasonable depth during the summer months. Moreover,
dehumidification, another equally important aspect of cooling, is
difficult to achieve with earth cooling. Mechanical dehumidifiers will
most likely be necessary.
The dark and humid atmosphere of the cooling tubes may be a
breeding ground for odor-producing molds and fungi. Furthermore,
condensation or ground water seepage may accumulate in the
tubes and encourage the growth of bacteria. Good construction and
drainage could eliminate some of these problems.
http://www.daviddarling.info/encycloped ... _tube.html-----------------------------------------------------------------------------------
1979 Hillside Cool Tube Filtered Fresh Air Intake
http://www.zeroenergydesign.com/Architecture.htmunderground air cooling system diagram
http://www.fieldlines.com/story/2007/11/3/542/37792
air into a house.
Your second most important consideration is humidity...
Air circulation...