[Cob] Cobber looking to cob

[joe r dupont]

I kind of doubt it.
if you had a heat sink.. something that is big, has a lot of mass and
will assume earth temp, then you might have a plan.
holes drilled at the base of the house will draw air through mass that is
generally colder than the outside air, especially if on the north side.
HOwever if there were a great pressure drop..the thin air would assume
that temp and when the pressure increases  inside the house I would think
it would get hotter. the pressures differences are so slight that I doubt
that it would matter.
Earth Pipes are a straight foward way to go.. cheap corrugated PE pipe
that flexes.. 4" ID  put it down  8 feet and you have either cold air
increase to earth temp .. or hot air reduced to earth temp.
If the angle is correct you can put a sump pump and collect condesation
too.
some people complain about mold..
but I love the idea.
you can use a solar chimney to draw the air into the house. The more sun
the more draw..
 
On Sun, 10 Jun 2007 12:05:56 -0400 "paul" <dotpaul at paulleblanc.net>
writes:
> Hi, here's an interesting article about passive air conditioning by 
> use of a 
> "cooling tower" (a Persian design.)  I don't think it's really 100% 
> passive 
> because you need to pump small amounts of water up to the top of the 
> tower, 
> but that is minimal and can be handled by 12 volt.  It's pretty 
> ingenious. 
> The best part is that it is the total ventilation system as it drags 
> the 
> cool air down the tower and into the house, as it forces the hot air 
> out the 
> solar chimney.  Very nice.  No need to swelter even in brutally hot 
> 
> climates.  Between this and some thermal mass of cob or adobe you 
> have a 
> very nice "climate" inside.
> 
> http://www.thefarm.org/charities/i4at/lib2/aircool.htm
> 
> Has anybody heard of the following technique?  You drill small holes 
> in the 
> window sills and at the bottoms of doors, close up the windows 
> tight,  with 
> an attic fan pulling air in through the small holes?  Supposedly the 
> air is 
> cooled down by forcing it through the small holes (and it dehydrates 
> it to 
> some degree.)  I can't find info about this though, so if you know 
> of it can 
> you post it?  I heard long ago that Indians in Florida used this 
> technique 
> but leveraged the breezes instead of a fan.  Apparently if you play 
> the 
> breezes right (which has to do with creating high and low pressures) 
> it can 
> be done passively.
> 
> I think that effect is known as the Venturi effect.  It's sort of 
> like 
> ramming air through a small space to create velocity and this causes 
> an A/C 
> effect.  I've been searching without much luck though.  Anybody know 
> more 
> about this?
> 
> 
> 
> 
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