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Table of contents

Chapter 11

Energy in the News

Magnets

EarthsÕ Magnetic Field Lines

Magnetic Particles Lined Up in Field

Electrical Currents Make Magnetic Fields

Coils of Wire (Solenoids)

Parallel Currents Attract

Parallel Currents in Loops Attract

Parts of an Electric Motor

Detail of Electromagnet in Motor

Two Types of Current

A Moving Magnet Produces Current in the Wire

Electrical Generator

Electrical Generator: Second View

Alternating Current from Generator

Cross Section of Gas Turbine

High Voltage Transmission Lines

Transformer: Changes Voltage and Current (not Power)

Transformer on Power Pole

Overall Electrical Distribution

Typical Magnetic and Electrical Fields

Costs of Electricity

Costs of Transmitting Energy

Turbines (Jet Engines)

How a Turbine Engine Works

Detail of Turbine Combustion Area

Cogeneration Power Plant= Both Heat and Power Output

Separate Power and Heat Generation vs Cogeneration

Efficiency of Cogeneration

Coal Gasification with CoGeneration

Author: W

E-mail: menke@ldeo.columbia.edu