Dear, dear... I'm an apocalyptical-like type of guy, but that doesn't stop me to be joyfull about hearing that "I'm not alone in the universe".
I live in an area, where, my main concern is to heat the living space.
So, a DX (Direct Exchange) heat pump is the best solution for me, given the fact, that the depth of the soil (the high thermal inertia kind of, dense and wet... huh, i can't spell it in English...) is approx. 4 meters (13 feet), but , even if i should go horizontally, i went vertically, and drilled (manually, no machine involved, no gas had been burned for that drill-bit to turn) in the hard lime that lied beneath the 4 meters.
Rock, has less thermal conductivity and less inertia, so i had to drill deeper.
The compressed air, heat pump, failed, at least for me, because of the much higher pressures involved, and the two step compressor needed for air liquification or vapor saturation. I'm sure that it would be much more "powerfull", but with out a compressor big enough, I'll stick with, ozone friendly, butane.
It's easy to compress and safe enough( regarding the explosion risk)
The first few tests. revealed that i need a slightly better butane-ground thermal contact, I'll do it with, vertical, copper sheets, welded on the ground pipes like fins on a radiator.
Also, it might be powered with additional solar power, as a solar heater is under construction, or even go completely self-sustained with solar photovoltaic cells and solar heater!
I had some time to learn about the physics involved in heat transfer and fluid mechanics, I'm an experienced electronist, with a passion for physics, and ecology, ameing for total (101%) energetic autonomy, so, i hope that nobody else starts to compress butane at 20+ bar, without the necessary knowledge, skills and experience in the hazards involved in using highly compressed, highly flamable gases, so, very, near to spark sources, as compressro's relays or mains switches, not to mention how hot that butane gets, in the condensor's coils!
Finally, i hope to finish the complete instalation of the heat pump in my house, sometime this year or at the beginning af the next.
After that, i will try to put some schematics of the electronics involved, plans of the pump and photos of the installed pump next by the ruthless thermometer, all in one place for the willings, the "numbers" will decide if i will install another or more small sized pumps.
Sorry for those spelling issues, but.. spellcheckers might not be perfect.<img>
They make sense economically and environmentally.
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