Dear forum members,
I am planning to build a single-family house with a heat pump and want to carry out a deep drilling for this purpose.
Problems in my view – possible legacy issues from mining (Ore Mountains).
In another post, I also read that the local water authority has objected:
“Now the local water authority has thrown a wrench in the plans and does not allow deep drilling.”
Therefore, I would like to know where problems generally arise and how these can be identified early and avoided.
Best regards,
Florian
PS: The construction company believes that deep drilling would not be problematic.
PPS: I would prefer not to be surprised by insurmountable problems after the planning process.
I am planning to build a single-family house with a heat pump and want to carry out a deep drilling for this purpose.
Problems in my view – possible legacy issues from mining (Ore Mountains).
In another post, I also read that the local water authority has objected:
“Now the local water authority has thrown a wrench in the plans and does not allow deep drilling.”
Therefore, I would like to know where problems generally arise and how these can be identified early and avoided.
Best regards,
Florian
PS: The construction company believes that deep drilling would not be problematic.
PPS: I would prefer not to be surprised by insurmountable problems after the planning process.
GRD Drilling Method – this term has not yet been discussed in this forum.
Currently, it is common practice to access geothermal energy through vertical drilling. The drilling technology required for this is complex, expensive, and often causes surface damage.
It is not unusual for a significant portion of the investment costs to be solely attributed to drilling. This limits the willingness to invest for many homeowners.
With the new GRD method (GRD = Geothermal Radial Drilling), the costs can be significantly reduced.
Just as a tree spreads its roots into the ground, the GRD method allows geothermal probes to be installed radially (in a star-shaped pattern) from a small shaft in all directions and angles, including beneath buildings.
In northern German terraced housing in Westphalia, the system was awarded an innovation prize.
===
With the new GRD method, it is possible to install geothermal probes quickly and cost-effectively using a small drilling rig tailored to the task. Unlike conventional installation techniques, this method installs geothermal probes into the subsoil at inclination angles between 25 and 65° from a central shaft in all directions.
If interested, please search for more information online...
Best regards
Ecart
Currently, it is common practice to access geothermal energy through vertical drilling. The drilling technology required for this is complex, expensive, and often causes surface damage.
It is not unusual for a significant portion of the investment costs to be solely attributed to drilling. This limits the willingness to invest for many homeowners.
With the new GRD method (GRD = Geothermal Radial Drilling), the costs can be significantly reduced.
Just as a tree spreads its roots into the ground, the GRD method allows geothermal probes to be installed radially (in a star-shaped pattern) from a small shaft in all directions and angles, including beneath buildings.
In northern German terraced housing in Westphalia, the system was awarded an innovation prize.
===
With the new GRD method, it is possible to install geothermal probes quickly and cost-effectively using a small drilling rig tailored to the task. Unlike conventional installation techniques, this method installs geothermal probes into the subsoil at inclination angles between 25 and 65° from a central shaft in all directions.
If interested, please search for more information online...
Best regards
Ecart
B
Baujulchen20 Oct 2015 06:06BeHaElJa schrieb:
Lower Saxony has a website where all boreholes are listed. Maybe there is something similar where you are.I just asked Aunt Google, but I haven’t found a list yet.
Could you please tell me where I should look?
The state of Lower Saxony?
B
Bauexperte20 Oct 2015 10:01Good morning,
Regards, Bauexperte
Ecart schrieb:To my knowledge, the costs for this drilling method are about the same as for conventional drilling, depending on ground conditions. This is likely because multiple smaller boreholes need to be drilled; and this drilling method is not actually that new. Therefore, there must be a reason why it hasn’t become the leading technique; innovation awards are not the only decisive factor.
With the new GRD method, geothermal probes can be installed quickly and cost-effectively using a small drilling rig tailored to the task.
Regards, Bauexperte
T
toxicmolotof21 Oct 2015 01:09I don't find the price too expensive, but I paid significantly less for 10 meters (about 33 feet) less—by that, I mean roughly 2,000 euros less, NRW Rhineland.
How many meters have you drilled? The state office recommends 70 to 90 meters (230 to 295 feet) for a double U-tube probe. The drilling contractor suggested 100 meters (330 feet) and assumes a heat extraction rate of 50 W/m (15 W/ft), which we don’t even have. This confuses me a bit.
If you google "efficient heat pump sizing for ground probes" and click on the first non-ad page, you’ll find very good information on designing the borehole that will hopefully help you. Unfortunately, links are not allowed :-(.
Otherwise, I would recommend taking a few meters (feet) more rather than less, as this definitely increases efficiency (even if only slightly), and it puts you on the safe side—especially if a long and cold winter occurs.
Otherwise, I would recommend taking a few meters (feet) more rather than less, as this definitely increases efficiency (even if only slightly), and it puts you on the safe side—especially if a long and cold winter occurs.