The diagram illustrates the process of extracting hot underground water in order to produce electricity.
The initial stage of the cycle begins by pumping hot underground water to the surface. This water is delivered to a heat exchanger using a pipe. The heat exchanger is able to use the heat from the water to run a power station which in turn produces electricity. This electricity is forwarded to the national grid and is used to serve our electricity needs.
Once the heat is taken from the water, the cool water is returned back through the layer of hot rock where it will heat up again.
To sum up, using geothermal energy to produce electricity is relatively easy and requires extracting heat from layers of hot rock in the form of hot water. This is a renewable form of energy as the water is returned back to the ground and re-heated to be used again.
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