TENERGIE
Hydroelectricity, the main source of renewable energy in France
Principle
Hydroelectric power is a renewable source of electricity obtained by the conversion of hydraulic energy from the different sources of flowing water (rivers, waterfalls, marine currents, tides, waves etc,). The kinetic energy of the flowing water is transformed by a turbine into mechanical energy and then, by an alternator, into electricity.
A small hydroelectric plant is defined as an electricity-producing plant, with a production of less than 10 MW. There are 1700 small hydroelectric plants in France, 1400 of which are owned by private producers of electricity. They are classified according to the amount of installed power :
- Small plant: from 2MW to10 MW
- Mini-plant: from 500 kW to 2 MW
- Micro-plant: from 20 kW to 500 kW
- Pico-plant: Less than 20 kW
The two essential factors to the recuperation of the available energy are the height of the drop and the water’s rate of flow.
Working principle of a small hydroelectric plant
Small hydroelectric plant
A guaranteed profitability
Of all the sources of renewable energy, hydroelectricity offers a definite advantage in terms of profitability:
- The contract with EDF is guaranteed for 20 years, by ministerial decree: each day, hydraulic energy provides regular incomes. (download the pdf file in French)
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