[Greenbuilding] [BULK] Re: rock storage + heat pump

[Brian Hyslop]

 One reason to use rocks (I think) is that they will release heat/energy more slowly, thereby holding heat longer into the winter.  If you do pull the air directly from the rock mass and end up having a mold problem, you need to figure out  to resolve it with out scrapping your entire system.
Brian Hyslop


Elemental Building Design LLC
1042 W. 18th Pl
Eugene OR
97402


541-484-1220
brian_hyslop at yahoo.com
OR CCB#165372



----- Original Message ----
From: Lawrence Lile <LLile at projsolco.com>
To: "YankeePerm at aol.com" <YankeePerm at aol.com>; "greenbuilding at listserv.repp.org" <greenbuilding at listserv.repp.org>
Sent: Wednesday, May 21, 2008 2:50:50 PM
Subject: Re: [Greenbuilding] [BULK]  Re:  rock storage + heat pump

Exactly, this is a good idea vs. using air as a medium.  But with water, why use rocks at all?  Water is better at holding and storing heat than almost anything else.

> -----Original Message-----
> From: greenbuilding-bounces at listserv.repp.org [mailto:greenbuilding-
> bounces at listserv.repp.org] On Behalf Of YankeePerm at aol.com
> Sent: Wednesday, May 21, 2008 4:39 PM
> To: greenbuilding at listserv.repp.org
> Subject: [BULK] Re: [Greenbuilding] rock storage + heat pump
> Importance: Low
>
> Why not sidestep the mold problem, immerse the rock in water, and use
> the
> heat pump to charge or discharge (depending on thermal needs) the
> temperature of
> the water/rock mass? If the water were in a closed system, circulating,
> you
> would have no problem with mold or other contaminants.   Someone better
> versed
> in the mechanical end of things might chime in about exactly how this
> is done.
>  If you install radiators, convection can supply warm water for heating
> in
> the event of electric failure, common in winter in many areas.
>
> Dan Hemenway
>
> In a message dated 5/20/08 11:53:19 PM, l-shea at sbcglobal.net writes:
>
>
> > We are building in Northwestern Illinois.  We want to combine a 4-6
> ft deep
> > rock storage system with a heat pump.
> >
> >   If we pull air directly from the rock storage with no separate duct
> system
> > running through the rock, do we need to worry about air quality
> (moisture/
> > mold)?
> >
> >   Is 4-6 ft deep enough to take advantage of geothermic heat in a
> rock
> > storage system?
> >
> >   If we use a heat pump, can this system both heat and cool the
> house?
> >
> >   One more question:  does the rock have enough thermal mass to act
> as the
> > active solar collector?  We are not building a hot room/ greenhouse.
> >
> >   Has anyone tried this combination?
> >
> >   Thanks,
> >
> >   Greg
> >
> >
>
>
>
>
>
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