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CURRENT ELECTRICITY 1. History 2. Methods for generating current electricity

CURRENT ELECTRICITY 1. History 2. Methods for generating current electricity. Luigi Galvani’s Experiments (1780-6 ) Discovered bioelectricity in animal cells. from The Day the Universe Changed by J. Burke.

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CURRENT ELECTRICITY 1. History 2. Methods for generating current electricity

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  1. CURRENT ELECTRICITY1. History2. Methods for generatingcurrent electricity

  2. Luigi Galvani’s Experiments (1780-6) Discovered bioelectricity in animal cells. from The Day the Universe Changed by J. Burke

  3. Mary Shelley’s Frankenstein concept was a result of Galvani’s discovery of bioelectricity.

  4. Defibrillator:An example of Galvani’s idea in modern use

  5. A battery with negative and positive terminals and electric current. Count Alessandro Volta (1799) from The Day the Universe Changed by J. Burke

  6. The First Motors and Electricity Generators are Developed in the early 1800’s Faraday’s Induction Machine (1832) from The Day the Universe Changed by J. Burke Oersted Discovers Electromagnetism (1820) from The Day the Universe Changed by J. Burke

  7. Electrical Generators Motors A generator converts motion energy to electrical energy. A motor converts some form of energy to motion energy.

  8. Electricity Generation • Today we use vast amounts of electrical energy. • According to the First Law of Thermodynamics, energy can be converted from one form to another, but cannot be created or destroyed. • How is the First Law of Thermodynamics used to generate electricity?

  9. Current Electricity Generation Hoover Dam

  10. Generators and Turbines Ina turbine, the input energy, like flowing water, pushes blades. The blades turn a shaft connected to a generator. The generator converts the kinetic energy into electrical energy.

  11. Energy Sources • Moving water, wind, sunshine energy, nuclear energy and heat energy from burning fossil fuels like oil, coal and gas are all energy sources for generating electrical energy. • These are divided into renewable and non-renewable energy sources.

  12. RENEWABLE – can be replaced within a human lifetime. Huron Wind Farm PhotovoltaicCells

  13. NON-RENEWABLE - can only be used once Burning Fossil Fuels: coal, oil or natural gas Nuclear Power: uranium

  14. Advantages and Disadvantages • There are advantages and disadvantages for all these forms of generating electrical energy. Consider these three factors: • 1. Economic Factors – costs to build, operate, to shut down? Amount of electricity 24 hours a day, 7 days a week? • 2. Environmental Factors – is the environment still healthy and clean? • 3. Social Issues – are there any health care costs or other hazards?

  15. Ontario Place What are some advantages and disadvantages?Wind Turbines Ontario Place Pickering

  16. Ontario Place What are some advantages and disadvantages?Oil and gas from the Alberta Tar Sands Ontario Place Pickering

  17. What are some advantages and disadvantages? Hydroelectricity– La Grande, a small part of the James Bay power project in northern Quebec

  18. Sustainability In summary we must consider if the electricity generation source is sustainable. Sustainability means considering the social, economic and environmental effects of producing and using electricity now and in the future. The decisions we make about generating and using electricity have many consequences and we must make good social choices.

  19. Sustainable?

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