How Do Generators Work?
Flip Flop Professional DevelopmentJune 14, 2012
Presenters:Jane R. Pablico
Gloria A. Quisido
Introduction Science Content Standards Vocabulary Review Lecture
◦ How Power Plants Work◦ How Generators Work
Hands On Activities◦ Building Turbine and Linear Generators
Presentation of Output
Agenda
SI GLE’s (Scientific Inquiry Skills, Understanding Scientific Inquiry)
PS GLE’s (Forms of Energy, Transformations of Energy, Interactions of Energy and Matter)
SE GLE’s ( Resources and Resource Management, Environmental Awareness and Protection)
Related Science Content Standards
Kinetic energy Potential energy Mechanical energy Generator Turbine generator Linear generator Electromagnetic induction Motor
Vocabulary Activity
Vocabulary Review Kinetic energy - the energy possessed by bodies in motion Potential energy - the energy possessed by bodies at rest and
ready to do work Mechanical energy - the energy associated with the motion and
position of an object Generator - a device that converts mechanical energy to
electrical energy Turbine generator - a rotary mechanical device that extracts
energy from a fluid flow and converts it into electrical energy or useful work
Linear generator –a device that induces electrical energy by a sliding magnet that moves back and forth through a solenoid - a spool of copper wire
Electromagnetic induction – a process in which electric current is produced by moving a wire loop through a magnetic field or by moving a magnet through a loop of wire
Motor - a machine designed to convert energy into useful mechanical motion
How a Coal-Fired Power Plant Works
HOLT Environmental Science
How a typical nuclear power plant works
HOLT Environmental Science
Heat is generated to turn water into steam. The steam turns a turbine which then makes the generator produce electricity.
What is Common to Both Power Plants?
A device that converts mechanical energy into electrical energy◦Turbine generator◦Linear generator
What is an Electric Generator
When the device is shaken back and forth, the magnet oscillates through the coil and induces an electric current.
How a Linear Generator Works
Shake Flashlight
Generating Electricity from Wave Energy
http://sustainabledesignupdate.com/2007/12/ocean-wave-energy/
As the turbine turns, the rotor (which is either the coil of wire or the magnet) connected to it will also spin with respect to the stator. If the magnet is the rotor, the coil of wire is the stator, and vice versa. The relative motion between the magnets and the coils of wire induces electrons to move through the wire, therefore producing electricity.
How a Turbine Generator Works
Any change in the magnetic environment of a coil of wire will cause a voltage (emf) to be "induced" in the coil.
Faraday’s Law of Electromagnetic Induction
http://www.way2science.com/index.php/faradays-laws-of-electromagnetic-induction/
changing the magnetic field strength moving a magnet toward or away from the coil
moving the coil into or out of the magnetic field
rotating the coil relative to the magnet
Ways of Electromagnetic Induction
Linear GeneratorTurbine Generator◦Wind◦Hydroelectric
Hands on Activities
Presentation of Outputs
Arms, K. & Savannah, G. (2004). Environmental Science. HOLT, Rinehart & Winston
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html
http://www.re-energy.ca/
References
Thank you!!!