Energy Types and Electrical Generation

Overview of Energy Types and Transformation

• Electrical Energy
    - Energy of charged particles.
    - Many types of energy can be transformed into electrical energy.

Types of Energy

1. Mechanical Energy
      - Definition: Sum of kinetic and potential energy.
      - Examples:
        - Roller coasters: The kinetic energy is high when descending; potential energy is high at the top.
        - Flowing water: Kinetic energy from the moving water can be transformed into electrical energy.

2. Kinetic Energy
      - Definition: Energy of motion.

3. Potential Energy
      - Definition: Stored energy due to an object’s position or condition.

4. Chemical Energy
      - Definition: Energy stored in chemical bonds, released when a chemical reaction occurs.
      - Examples:
        - Batteries: Store chemical energy which can be converted to electrical energy.
        - Biomass & fossil fuels: Stored chemical energy in organic materials from plants and animals.

5. Solar Energy
      - Definition: Energy carried by electromagnetic radiation from the Sun.

6. Nuclear Energy
      - Generated by forming new atoms.
      - Types:
        a) Nuclear Fusion: New atoms are created when smaller atoms collide and fuse together.
        b) Nuclear Fission: New atoms are formed by splitting larger atoms.

7. Thermal Energy
      - Definition: Energy due to the rapid motion of particles in an object.
      - Sources:
        - Nuclear reactions.
        - Earth’s interior (Geothermal energy) which can lead to phenomena such as geysers.

Electrical Energy Generation

• Electrical energy is generated in different ways from various sources:
    - Canada's Approach: Mostly generates electric energy from kinetic sources (e.g., hydropower).

The Generator System

• Definition: A mechanical system that transforms kinetic energy into electrical energy.

• Turbine: Can be spun by steam, water, or air; converts the mechanical energy of flow into rotational energy.
    - Shaft: Part of the system that spins with the turbine.
    - Generator: Converts the kinetic energy of the spinning shaft into electrical energy.

Primary Energy Sources in Canada:

• Hydropower

• Fossil fuels

• Nuclear reactions

Alternative Sources:

• Wind Energy: Wind turns the turbine within the generator system.

• Solar Energy: Photovoltaic cells transform visible light into electrical energy by allowing electrons to flow freely when exposed to sunlight.

• Geothermal Energy: Uses steam from molten rock that rises to the Earth’s surface to turn turbines.

• Wave and Tidal Energy: The rise and fall of tides and waves can be harnessed to turn turbines, generating additional energy.