Sunday, May 25, 2008

Re: [papercreters] PAHS

My tubes will have to be at least 4' down if not more.  I've got the elevation and the soil, so no worries there.  If I go 4' down I need to insulate over the pipes.  The deeper I go the less I need to insulate laterally.  Don will have to be the final word on this.  He isn't coming over to visit until we're a lot closer to building.
 
I'm using corrugated non-perforated pipe for my PAHS tubes.  It gives more surface area to dissipate the heat.
 
I'll use at least two collectors which I'll build out of papercrete.  The ones at Mica peak are concrete block, but papercrete will be far superior . . . acting as both thermal mass and insulation.
 
ElfN
----- Original Message -----
Sent: Sunday, May 25, 2008 10:32 AM
Subject: RE: [papercreters] PAH

I have been following Don's webpage for quite some time it would be nice if he updated a bit more frequently.  Depending on the depth the tubes go in the ground I may have enough elevation on my site to use only gravity.  How deep are your tubes going in?  Are you using 4" solid plastic tile?

 

Nick

 

From: papercreters@yahoogroups.com [mailto:papercreters@yahoogroups.com] On Behalf Of ElfNori
Sent: Saturday, May 24, 2008 11:29 PM
To: papercreters@yahoogroups.com
Subject: Re: [papercreters] PAH

 

I had the great fortune to meet Don Stephens (www.greenershelter.com), solar architect/engineer.  He designed a brilliant passive annual heat storage system for Jerry and Marilyn Mueller's new home on Mica Peak in eastern Washington.  I was privileged to see the system in use and look at Jerry's log of the temps at the various sensor points.  Very illuminating.  He'd been keeping track of the ground temperature since building began.  At 4 years of running the system he was nearly at his thermal battery conditioning goal.

 

The Mica Peak (Mueller's) system uses a solar chimney, which I don't want, so we've worked out a different system that uses solar powered fans and loops that begin and end in the collector.  The air is drawn through the ground loops (multiple loops per collector) very slowly to allow the heat to be absorbed into the ground.  The fans will come on when the box temperature is X degrees higher than the ground temperature.

 

ElfN


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