Geothermal heat

The Earth is hot at the core. This heat disappears through the crust into the vacuum of the universe.

Heat or lack of cold is a special form of energy. It has a similar property with fluid and gravity. Due to gravity, the liquid searches for the lowest point. Don't look for warmth at the lowest point, but always in the area where it is colder. Depending on the insulation of the heat, it takes longer for the heat to flow away. Think of a thermos. The thermos bottle has greater insulation than a normal bottle and therefore a liquid stays warm and cold for longer in a normal bottle.

Heat can be produced in different ways:
     • due to friction (non-lubricated parts, brake discs)
     • by combustion (combustion, explosions, these are actually chemical reactions)
     • by electricity
     • by nuclear fusion or fission

In the Netherlands, the average temperature at a depth of 1 m is 10 °C. In Iceland the temperature is much higher in some places. The temperature is so high that houses can be heated with it. In other places the ground is frozen, such as in Siberia. There it is called permafrost. The permafrost contains a lot of trapped methane and its thawing increases global warming.

On average, the temperature in the earth's crust rises 1°C for every 10 m that you go deeper. The depth where there is sufficient heat to heat houses therefore varies. If we want steam, we have to go much deeper. We can use steam to spin turbines and generate electricity.

Geothermal heat therefore offers an opportunity for clean energy.

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