Post on 13-Dec-2015
How Heat Energy is Transformed into Electricity
ElectricityElectricity is a secondary source of energy
We must use a primary source of energy to transform it into electricity
Electricity is the flow of electrical power or charge.
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.
The energy sources we use to make electricity can be renewable or non-renewable, but electricity itself is neither renewable nor non-renewable.
Energy Transformations—Remember what we know about energy transformations:
Potential Energy Forms Kinetic Energy FormsChemical EnergyStored Mechanical EnergyNuclear EnergyGravitational Energy
Electrical EnergyRadiant Energy (light and solar)Thermal EnergyMotion EnergySound Energy
Energy TransformationsTo Create Electricity
55
Current Current creates Field creates Field that wraps that wraps
around wire.around wire.
66
An electron orbiting the nucleus An electron orbiting the nucleus creates a small magnetic fieldcreates a small magnetic field
77
Magnetic InductionMagnetic InductionMoving magnet creates a currentMoving magnet creates a current
88Electricity and Electricity and MagnetismMagnetism
Moving charges (Current) Creates a Moving charges (Current) Creates a Magnetic Field.Magnetic Field.
Moving Magnets Create CurrentMoving Magnets Create Current
Heat & Electricity Generation
Source: Tennesse Valley Authority website at http://www.tva.gov/power/coalart.htm
Fossil Fuel (Coal) --Combustion to heat water
Water is heated in the boiler
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 re-circulated
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
Potential Energy Forms
Kinetic Energy Forms
Chemical EnergyStored Mechanical EnergyNuclear EnergyGravitational Energy
Electrical EnergyRadiant Energy (light and solar)Thermal EnergyMotion EnergySound Energy
?
?
Potential Chemical Energy
Kinetic Thermal Energy
Kinetic Thermal Energy heats incoming water in the boiler (furnace)
The heated water is turned to high pressure steam
The High Pressure Steam turns a Turbine, transforming the kinetic thermal energy into what kind of energy
Potential Energy Forms
Kinetic Energy Forms
Chemical EnergyStored Mechanical EnergyNuclear EnergyGravitational Energy
Electrical EnergyRadiant Energy (light and solar)Thermal EnergyMotion EnergySound Energy
?
Kinetic Motion Energy
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.
Potential Energy Forms
Kinetic Energy Forms
Chemical EnergyStored Mechanical EnergyNuclear EnergyGravitational Energy
Electrical EnergyRadiant Energy (light and solar)Thermal EnergyMotion EnergySound Energy
?
Kinetic Electrical
Energy
?
If your starting fuel was something different, what parts of the power plant would be the same or different?
Combustion fuels(petroleum, gas, biofuels)
Wind and Tidal Power
Geothermal
Nuclear
Solar Photovoltaic