[Greenbuilding] Composting cat shit
bkorves at winfirst.com
Sat Feb 21 12:17:06 CST 2009
----- Original Message -----
From: "RT" <ArchiLogic at yahoo.ca>
> Perhaps someone would care to 'splain eet to me, the wisdom of making a
> "low mass greenhouse" because quite frankly (and shirley too) I don't get
> Rob Tom
First, it is "low thermal mass sunspace", not "low mass greenhouse." This
is used as an air heater to transfer energy to the insulated building, and
any excess produced stored in thermal mass there.
It is ideal for heat transfer if the sunspace can heat up quickly, therefore
more quickly able to transfer heat to a cooler interior or mass storage.
Any additional thermal mass in the sunspace slows the rate of warming, and
whatever heat is stored in the sunspace mass will be mostly lost back
through the glazing at night or when clouds move in. The low mass sunspace
is much better able to collect heat during partly cloudy days with a short
period of sun followed by a period of clouds.
This assumes a sunspace built primarily to help heat the building, and not
planned primarily for maximizing plant or human comfort levels in the
sunspace. Such low thermal mass sunspaces can be built with a small depth
from the building walls, purely as a solar collector, or may have additional
depth for light storage (bicycles?) and for use by occupants when conditions
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