Win a copy of Keeping Bees with a Smile this week in the Honey Bees forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Nicole Alderman
  • Mike Haasl
  • Anne Miller
  • Joylynn Hardesty
  • Pearl Sutton
  • paul wheaton
  • r ranson
  • James Freyr
  • Devaka Cooray
  • Jocelyn Campbell
master gardeners:
  • Steve Thorn
  • Ash Jackson
  • thomas rubino
  • Jay Angler


Posts: 4154
Location: Northern New York Zone4-5 the OUTER 'RONDACs percip 36''
hugelkultur fungi books wofati solar woodworking
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
It has been proposed that a Hugel-Bed as the north wall of a Greenhouse will insulate, add moisture as it captures run off from Greenhouse roof, increase growing
area, and as a thermal mass balance temperature swings !

For my dialog I will call the Hugel-Bed what it often is, and will be if used this way here ! Our Super Saturated Hugel Sponge S.S.H.S., is a large mass that by being
saturated does not truly insulate the interior of the greenhouse, but actually cools it. ( I.M.H.O.!) As the Super Saturated Hugel Sponge S.S.H.S. tries to equalize its
water vapor pressure with the interior of the greenhouse, the movement of that vapor cools the S.S.H.S. as the result of the latent heat of evaporation . As the vapor
in the Greenhouse increases there will be more water vapor condensing against the interior skin of the green house- here most of that heat will be radiated out through
the outside wall of the Greenhouse!

The vaporization continues until the wet bulb temperature is reached and every surface in the green house is wet ! The S.S.H.S. has given up a lot of latent heat of
Evaporation to the interior of the green house that was then lost to the cooler skin of the Greenhouse and now cools the interior of the Greenhouse !

We now need to look at the Dangers of having a heated space at total water vapor saturation,leading to Smuts, Rusts, and molds - or requiring increased levels of Air
Exchanges With even more heat energy lost plus the energy bill for moving/exchanging the air !

This does not mean that there would not be a place for the S.S.H.S. Greenhouse as an adjunct after your plants have hardened off ! We just need to be aware of the
hidden energy costs ! This is my attempt at a reasoned description of what I Believe will happen in a S.S.H.Sponge-Greenhouse. Y.M.M.V. - A. L.

For the future/good of the Craft ! Be safe, keep warm ! PYRO-Logical Big AL - As always, your comments / questions are solicited and are Welcome A. L.
Posts: 90
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I think I would agree and put the Hugel on the other side of the greenhouse.

Greenhouses are usually places for intensive cultivation of plants so irrigation does not seem out of place to me.
One might use aquaponics and some sort of automatic watering system to help reduce the work load.
I'm so happy! And I wish to make this tiny ad happy too:
Learn Permaculture through a little hard work
    Bookmark Topic Watch Topic
  • New Topic