Solterra
was designed completely with CADKEY, a very versatile and easy to use
CAD software program. The model is done totally in 3D CADKEY Solids
with R19 so that positions of all architectural components can be
checked for dimensional accuracy and clearances from each other. The
model provides many visual and exciting images that subcontractors,
companies, and material suppliers can readily understand and relate to.
Since I teach CAD at a local community college, it was very natural for
me to do the entire plans myself with CADKEY.
The image above shows a rendering of Solterra. One main requirement of
design was to be energy independent at least a portion of the year. To
accomplish that, we've utilized the following:
1. Super insulated the home with Nudura ICF walls and Insul-Deck ICF
ceiling along with a radiant barrier on all external surfaces to cut
heat loss and gain.
2. Included a 1.5 KW wind turbine that feeds power back to Toledo Edison on a 64 ft. tilt tower.
3. Mounted a 2.8 KW Photovoltaic (solar cell) array on the 15° pitch of
the 2nd story roof trusses, which also feeds power back to Toledo
Edison.
4. Mounted 5 Sunearth "Empire" collectors with black chrome absorbers
on the 56° pitch of the trusses to generate thermal heat to be stored
in a 440 gal FG insulated storage tank from which DHW and heat for the
radiant floors will be exchanged.
5. Included a geothermal Water Furnace will provide A/C in the summer and become a double backup for heat.
6. Used passive solar input through glass areas on the south and east
with overhangs to block out the sun during the summer months.
7. Built in a Trombe wall for passive solar collection and radiation throughout the nighttime hours.
Another of the goals for the home was to have little or no maintenance.
Groundcover and plants will cover the sloping berms and earth covered
roof. Designs of a radiant sun and moon all will be done with plants.
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