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5272Re: cool/cold climate greenhouse

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  • Sapho
    Mar 4 8:12 AM
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      Thats very intresting, thanks for the links!

      More on heating greenhouses in substainable & energy efficient ways:
      Has any of you done any experimenting with compost-heating?

      http://attra.ncat.org/attra-pub/compostheatedgh.html

      Sapha



      --- In pfaf@yahoogroups.com, "Ossi Kakko" <ossi@...> wrote:
      >
      > Just want to let you know that Jerome Osentowski in Central Rocky Mountain
      > Permaculture Institute has excellent cool/cold climate greenhouse design
      > utilizing the subterranean heating and cooling system, aka climate
      > battery. See more info:
      >
      > http://permaculture.org.au/2010/08/16/clever-rocky-mountain-greenhouses-give-major-season-extension/
      >
      > http://ecosystems-design.com/Greenhouse%20Design%20Services.html
      >
      >
      > :) ossi (from finland)
      >
      >
      > > You have to have lots of panels and lots of storage capacity to handle the
      > > nights and the unexpected days when there is cloud cover. In northern
      > > latitudes, solar in winter is a dream or a very, very expensive reality.
      > >
      > > From experience, it doesn't take many hours to drain a storage bank if it
      > > is not being replenished every day and I do mean every day. An overcast
      > > day is a big, big problem. Two days in a row means turning on the mains
      > > or a generator. When ever I look at a so-called off-grid setup, the
      > > moment I see a generator is the moment that I call foul.
      > >
      > > Since you are trying to minimise heat loss, it would seem to make sense to
      > > look at construction. Obviously, south facing is critical. If that's
      > > where the sun is strongest, why expose the northern wall to the air?
      > > Insulate it, ideally, by building into a hill side and burying all but
      > > that south wall. Build on a concrete slab that is painted black.
      > >
      > > MikeH
      > >
      > > --- In pfaf@yahoogroups.com, john willis <wilf1946@> wrote:
      > >>
      > >>
      > >> Hello Traveller in ThymeTotally agree about heating greenhouses with
      > >> fossil fuel but I do feel they are pretty good passive solar collectors
      > >> on sunny days and also pv panels can be used to charge batteries for
      > >> nights and dark days.JohnMW
      > >>
      > >> To: pfaf@yahoogroups.com
      > >> From: traveler.in.thyme@
      > >> Date: Wed, 2 Mar 2011 13:59:36 +0000
      > >> Subject: [pfaf] Re: overwintering tomatoes in greenhouse
      > >>
      > >
      > >
      >
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