Annualized geo-solar Enables passive solar heating in Even cold, foggy north temperate areas. It uses the ground as a thermal building to heat and cool the building. After a design, the thermal lagoon of the heat is returned to, or removed from, the inhabited spaces of the building. In hot climates, exposing the collector to the frigid night sky in winter can cool the building in summer.
The six-month thermal lag is provided by ten feet of dirt. A six-meter-wide (20 ft) buried skirt of the building of the building, which is usually under the building. The dirt is radiant heating and cooling through the floor or walls. A thermal siphon moves the heat between the dirt and the solar collector. The solar collector may be a sheet metal in the roof , or a wide flat box on the side of a building or hill. The siphons can be made from plastic pipe and carry air. Water leaks and water-caused corrosion. Plastic pipe does not corrode in earth damp, as metal ducts can.
AGS heating systems typically consist of:
- A very well-insulated, energy efficient, eco-friendly living space;
- Heat captured in the summer months from a sun-warmed sub-roof or attic space, gold has sunspace greenhouse , a ground-based, flat-plate, thermosyphon collector, solar or other heat-collection device;
- Heat transported from the collection source for the earth mass under the living space (for storage), this mass surrounded by a sub-surface perimeter “cape” or “umbrella” providing both insulation and heat-loss. outdoors air and a barrier against moisture migration through heat-storage mass;
- A high-density floor which is designed to radiate heat back into the living space, but only after the proper sub-floor-insulation-regulated time-lag;
- A control-scheme or system which activates (often PV-powered) fans and dampers, when the warm-season is sensed to be hotter in the collection area (s) than in the storage mass, or allows the heat to be moved into the storage-zone by passive convection (often using a solar chimney and thermally activated dampers .)
Usually it requires several years for the storage of earth-mass to fully preheat the local at-depth soil temperature (which varies widely by region and site-orientation) to an optimum living space through the winter. This technology continues to evolve, with a range of variations (including active-return devices) being explored. The listserve where this innovation is most often discussed is “Organic Architecture” at Yahoo.
This system is often used in Northern Europe. One system has been built at Drake Landing in North America. A more recent system is a Do-it-yourself energy-neutral home in progress in Collinsville, IL that will rely solely on Annualized Solar for conditioning.