https://www.econologie.com/forums/post242139.html#242139
Did67 wrote:dedeleco wrote:
To heat for free in winter with summer heat, it has been working since 2007, with good efficiency, at:
www.dlsc.ca
This system interests me as part of a project related to my work.
Unfortunately I have not found any financial data: how much does this whole installation cost: drilling, pipes, connectors, pre-storage and the control system? For what surface (or what heating power? [Well, the power, I can guess via the assessments that are put].
This system is new and therefore the price of a first realization with exploratory research in Canada, has no reference value to make a decision. Everything can be simplified, and in my opinion you just have to try before a big achievement.
For example, on a greenhouse that needs less 20 ° C and that is content with 10 ° C or even just be frost-free in winter.
I want to try ultra-simple in the 83, not cold, to take the place of my scam heat pump, but I do not have 20 or 25 mm drills with long extensions easily in the trade.
My current thoughts in addition to those on econology:
https://www.econologie.com/forums/chaleur-d- ... 28-20.html
https://www.econologie.com/forums/dedeleco-o ... 99-30.html
What seems fascinating to me is the simplicity, drilling easy holes a few meters deep a little more than 3 to 6m, and everything is accessible to the handyman at home in his garden for a system both new and very old in the caves prehistoric, for a solar thermal with shallow geothermal storage, eliminating all CO2, all nuclear, all pollution, in perpetuity, to heat !!
I put assessments of orders of magnitude and links on this type of interseasonal heating (on google) on econology to fix the guiding principles, which have been discussed on econology, with fairly disparate techo choices, shallow or deep, by Obamot often (with his fallacy from the gas power plant), and above all the serious problem of traffic deep waters, to be blocked if they exist by injections of product blocking this circulation, cheap cement ou same product making water solid by soaking up water.
A basic figure that fixes the ideas is that one stores roughly 10KWh / m3 earth (clay for example, a little more in the rock) by heating it from 36 ° C in addition to 20 ° C to 56 ° C (a Canadian well having 3 times minus 12 ° C, in variation of T gives 3 times less in reserve before freezing, with a heat pump)
You have to descend more than 3 to 6 m.
There are other various achievements and studies with published technical articles to read, which I did not research thoroughly.
For dlsc.ca, there must be detailed articles in paid trade journals to have the article.
The price in my opinion is very strongly a function of the methods of realization, the nature of the ground, soft or hard, the method of drilling holes which can be of small diameter with pipes of small diameter, as made by the specialists of injection of expanding foam to straighten houses and buildings with collapsed foundations ( Uretek or Géosec ).
I saw them do it, they pierce the foundations and the ground underneath manually with a long drill like butter with a perforating drill, quickly to thread pipes of small diameters, about 20mm, easily already a good depth of several meters.
I think that with the same system there is a way to greatly reduce the price compared to large wells of 150mm or 200mm well conventional for wells, a price however not astronomical.
It is better to increase the density of these small diameter boreholes;
At home, I want to try, to measure, with the simplest material, hand drill, long drill, since it is very simple with a simple inexpensive 16mm hose (the one for drip irrigation is very well, solid more than 10 years in the sun in my garden, usable in earthen holes, as well as for simple and cheap thermal solar collectors of summer shown on Apper, econology and internet, just under plastics.
It's super easy to make, except for me, get me long drills, put end to end of small diameter 20mm or 30mm.
You can easily find up to 1m but no more.
There are also sellers of drilling equipment who can generally supply larger diameters, 150 or 200mm or less as 50mm with a geotechnical drilling auger.
For a large project, the price of such an auger is not excessive, (price of car or van) used and owned by all soil survey professionals.
We should be able to rent them.
So the price is that of labor to drill, and then much lower than that of larger diameter drilling.
I want to try at home by drilling in my gardens with a perforator, far from the foundations of houses, (heating the ground is like having a heat wave that cracks the clay under the foundations and therefore the house). The best place is under the asphalt of a nearby car park, by drilling at an angle.
The only problem for me is to have long bits put end to end of small diameter. So trying and measuring the thermal properties of the soil is easy.
The problem is that professional equipment is not very accessible to DIY enthusiasts.
Otherwise the development of inexpensive and fast simple drilling would be interesting, with drill at the end of the small diameter pipe to bury and thread, with circulation of water and pressurized air to rotate the drill, and to remove debris, which would allow the pipe to follow a path in large U underground, as a kind of micro-robot (or like a robotic mole).
In my opinion, with a little imagination there is a way to greatly reduce the cost price, to very little.
Everything else can be very inexpensive, the pipe costs less than € 40 per 100m, put underground as well as under the sun !!
For the circulating groundwater, there is also a way to block it by injection of the product which swells and solidifies the water, or with pressurized cement, a method already developed for large-scale works.
I think, to identify the best solutions, that we must try simple, by investing not too much, just what is necessary, by avoiding spending too much, in what is not essential, and thus by trying different variants, of this system which is basically very simple compared to any other technological system currently used, such as a heat pump, a Stirling or a nuclear power plant.
It is accessible to DIY enthusiasts to develop with imagination.
In France we prefer big projects and we despise what is to be made cheap, specialty of the Japanese who made the general public inexpensive in large numbers, very expensive systems at the start, such as the microwave oven or the heat pump .