Branching U Tube Thermal Siphon For Annualized Heat Storage
Addressing Cold-Wet Ground Conditions Found In The US Northeast
In addition to drain-pipe drainage, stored-warmth forces water downward. It is a form of drying. In summer, soil is dried by evaporation and trapped moisture can also be forced downward to cooler soil. (Perhaps these include a form of downward condensation as well). This can inspire a confidence in daring to build a system in soils, which are initially cold and wet soils. The insulation encloses the semi buried house with the large mass of earth to hold temperature steady. Perpetual conduction of heat through a very large volume of earth can stabilize comfortable ambient temperatures inside, largely from summer heat replenishment. Air tight construction with heat-exchanger-ventilators keeps air fresh and it's temperature un wasted. Outdoors could be the worst heat wave or the most frigid arctic cold. All this with out purchase of energy, no heating-cooling bills. Such are the implications of self heating houses.
Here is a self heating house model which employs branching u tubes to accelerate heat transfer. The living space could perhaps be larger, even with a second story added above ground. As drawn it might serve in extremely cold-wet climates. The only heat-system costs are tubes and insulation which may be purchased along with hired labor. The job to insulate around the perimeter of the earth mass would largely be accomplished with a back hoe by digging a perimeter ditch. This ditch is additionally important to intercept and drain ground water and keep the house site dry as possible.(Drainage tubing and sand may also be needed, house building has numerable tasks). Below is another picture-set displaying only the tubes with surrounding insulation, for simpler clarity.
This visual-schematic system amplifies heat exchange and conceivably might reduce ventilator tubing needs. The use of two perimeter tubes along with radial tubes near to the outdoor ground surface is the main focus offered here. It is perhaps more complex than other earth heating systems reported out there. It does however save labor by combining the important dug drain, additional insulation and the outer perimeter tube installation. Also, house-air- ventilation tubes might take advantage of this outer perimeter path. It would connect through the "U Connector Closet" in first picture. A simple solar chimney is also needed, (or green house in it's place).
Complete Independence From Imported Heating Fuel For Cold Climate Buildings.
As of 2006, the green building movement has yet to celebrate an otherwise ignored technology. This complete independence is implied by some amazing successes which have already been pioneered. Various terms have been suggested ie: Passive Annualized Heat Storage, PAHS, Annualized Geothermal AGS. Semi-buried houses hold many advantages for this more thorough and economical "green technology". Otherwise, unburied houses must be "buried" with piles of super-insulation. Minimalist-window- super insulating has achieved green popularity. However, it still depends on some heating fuel, (though a conserving amount of fuel). To open a house up with more windows and at the same time not consume imported fuels at all, is the domain of massive-thermal-storage like PAHS or AGS. The chief obstacle is combining geology with architecture which stretches belief and skill. It is left to pioneers to explore the ramifications. The incentive is fuller green living, bringing more daylight and scenery in for health, while not promoting world havoc for energy. This model is the result of intuitive speculation, spurred by reported successes with underground houses.
See my nephew's research and discussion page on PAHS and PAHS precursors.
Joe Anderson, PE, through his Prime Design Engineering, has done some interesting thermal modeling for self heating houses. (I think Joe coined the term "self heating house"). Joe found that earth tubes can be minimal and even omitted for much of the USA. I interpret that one can almost remove floor insulation in a super insulated house to achieve self heating, self powered radiant flooring? Through some emails and perhaps unknowingly, Joe helped jog me to invent the square donut design.
Here is a Virginia man who achieves self heating without earth tubes, but does depend on an electrical heat exchanger.
Another North Westerner who has designed and built AGS homes reports on his work, but offers few picture-diagrams on the web.
In the 1900s, the most acclaimed book on PAHS: "Passive Annual Heat Storage, Improving the Design of Earth Shelters.
I would love to discuss a potential project like this. Here is my approach to building a strong, style adaptable and cost efficient concrete structure. It is especially suitable for semi-buried or bermed housing. I can offer discounts on my labor for the first project.
Note: These pages are placed in the public domain and are furnished "as is". The author assumes no responsibility for the use or misuse of the concepts in this series. All authorities should be satisfied first, as might be required, by relevant laws, before any building proceeds.
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