The reading module. Read the text: thermal and nuclear power

Read the text: Thermal and Nuclear Power

In a conventional thermal power station, a fuel is used to heat water, which gives off steam at high pressure. This in turn drives turbines to create electricity.

At the heart of a power station is a generator, a rotating machine that converts mechanical energy into electrical energy by creating relative motion between a magnetic field and a conductor. The energy source harnessed to turn the generator varies widely. It depends chiefly on which fuels are easily available and on the types of technology used.

Thermal power plants are classified by the type of fuel used.

Nuclear power plants use a nuclear reactor’s heat to operate a steam turbine generator

Fossil fuelled power plants may also use a steam turbine generator or in the case of natural gas fired plants may use a combustion turbine.

Geothermal power plants use steam extracted from hot underground rocks.

Renewable energy plants may be fuelled by waste from sugar cane, municipal solid waste, landfill methane, or other forms of biomass.

In integrated steel mills, blast furnace exhaust gas is a low-cost, although low-energy-density, fuel. Waste heat from industrial processes is occasionally concentrated enough to use for power generation, usually in a steam boiler and turbine.

Solar thermal electric plants use sunlight to boil water, which turns the generator.

Дата добавления: 2015-08-03