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Geothermal model

Rating (?)
Difficulty (?)
Duration (?)0h 30 min.
Cost (?)~12 CHF
Languagefrançais english
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This project illustrates in a simplified way the drilling techniques used in deep geothermal energy.


Geothermal energy concerns the heat (thermal) found in the earth's subsoil (geo). This energy comes mainly from the earth's core, whose heat is considered, on a human scale, as an almost infinite resource. It is so considered as renewable and low-polluting energy.


Geothermal energy has been exploited since ancient times thanks to the hot springs that naturally reach the earth's surface. Today, in addition to heat pumps (20-300 meters deep), we are trying to take even better advantage of this energy by digging at very great depths to reach areas where the temperature often exceeds 100°C!


In a deep geothermal drilling (3-5 km), heat is recovered by injecting cold water underground. This water will warm up when it comes into contact with the heat of the subsoil and then rise to the surface through a second pipe. The heat from the borehole water is then transferred to another water network to heat buildings or produce electricity. Once cooled, the borehole water is returned to the ground and the process can start again.



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Mix the water and the quick-setting moulding powder according to the instructions. Place a layer ...
Wait for the moulding paste to harden (approx. 20 min), then add a layer of 1.5 cm of gravel.
With a large awl make two holes in the thin plastic circle. Push the two straw sections through ...
Prepare some more moulding paste and fill the rest of the jar almost to the top. Wait for it to ...
Punch a hole in the center of the bottle cap and push through one of the flexible tubes for abou ...
With transparent adhesive tape, stick one thermochromic strip on the bottle and the other one on ...
Download the diagram below from the Blueprints/Plans section and cover it both sides with transp ...
Open the cardboard ring by cutting it vertically.   To make it waterproof, cover it with plast ...
With double-sided adhesive tape, fix the ring inside the diagram to form a cylinder. Staple both ...

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