Electricity Generation How Heat Energy is Transformed into

Electricity Generation How Heat Energy is Transformed into Electricity

Electricity is a secondary source of energy We must use a primary source of energy to transform it into electricity v. Electricity is the flow of electrical power or charge. v. It is a secondary energy source which means that we get it from the conversion of other sources of energy, like coal, natural gas, oil, nuclear power and other natural sources, which are called primary sources. v. The energy sources we use to make electricity can be renewable or nonrenewable, but electricity itself is neither renewable nor non-renewable.

Energy Transformations— Remember what we know about energy transformations: Potential Energy Forms Chemical Energy Stored Mechanical Energy Nuclear Energy Gravitational Energy Kinetic Energy Forms Electrical Energy Radiant Energy (light and solar) Thermal Energy Motion Energy Sound Energy

Energy Transformations To Create Electricity Potential Chemical Energy Kinetic Thermal Energy Kinetic Motion Energy Kinetic Electrical Energy

5 Current creates Field that wraps around wire.

6 An electron orbiting the nucleus creates a small magnetic field

Magnetic Induction Moving magnet creates a current 7

Electricity and Magnetism 8 Moving charges (Current) Creates a Magnetic Field. Moving Magnets Create Current

Heat & Electricity Generation Water is heated in the boiler Fossil Fuel (Coal) -Combustion to heat water Heated water turns to high pressure steam Steam turns the turbine In the generator a coil of copper wire spins between electromagnets to create electric current Steam condenses water is recirculated Source: Tennesse Valley Authority website at http: //www. tva. gov/power/coalart. htm

Combustion Potential Chemical Energy Coal contains what kind of ? energy When coal is combusted (burned) the energy it contains is released in the form of what kind of energy ? Kinetic Thermal Energy Potential Energy Forms Chemical Energy Stored Mechanical Energy Nuclear Energy Gravitational Energy Kinetic Energy Forms Electrical Energy Radiant Energy (light and solar) Thermal Energy Motion Energy Sound Energy

Steam Kinetic Thermal Energy heats incoming water in the boiler (furnace) The heated water is turned to high pressure steam

Turbine The High Pressure Steam turns a Turbine, transforming the kinetic thermal energy into what kind of energy ? Kinetic Motion Energy Potential Energy Forms Chemical Energy Stored Mechanical Energy Nuclear Energy Gravitational Energy Kinetic Energy Forms Electrical Energy Radiant Energy (light and solar) Thermal Energy Motion Energy Sound Energy

Generator The turbine turns a magnet surrounded by a copper coil creating electric current. Kinetic Motion Energy is transformed into what kind of energy ? Electrons move through the copper wires to the transformer. Kinetic Electrical Energy Potential Energy Forms Chemical Energy Stored Mechanical Energy Nuclear Energy Gravitational Energy Kinetic Energy Forms Electrical Energy Radiant Energy (light and solar) Thermal Energy Motion Energy Sound Energy

If your starting fuel was something different, what parts of the power plant would be the same or different? v Combustion fuels (petroleum, gas, biofuels) ? v Nuclear v Geothermal v Wind and Tidal Power v Solar Photovoltaic