Electric power stations that use non-renewable energy sources

There are two types: thermal power stations and nuclear power stations.

THERMAL POWER STATIONS THAT USE FOSSIL FUELS.

This type of power stations use fossil fuels for generate thermal energy, for after convert the thermal energy into mechanical energy.

Thermal power stations works with coal, oil and natural gas that heat wáter in a boiler. In the boiler turns a turbine connected to the rotor of a generator. The energy produced by the generator is transported by a network of high voltage power lines. The steam goes to a condenser, where it cools and becomes liquid wáter. Finally, the water is pumped back to the boiler.

Combined-cycle power stations.

In cogeneration power stations, electricity is generated in two systems. The first, burns natural gas with compressed air, and then it produces superheated gases, which turn a turbine to generate electricity.
The second uses the previous hot gases and uses them to produce steam in a heat recover boiler. Finally the steam turns a turbine to generate more electricity. This are the reasons because of combined-cycle stations are more efficient that the single.




NUCLEAR POWER STATIONS.

This type of power stations use nuclear reactors, that uses radioactive material (specially isotopes of uranium), to produce heat.




Nuclear power stations produce a lot of energy that we can sold at a profit, but, in these power stations happens many accidents and  storage of radioactive waste.