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Solar Energy - P.5 Biogas – P.10 Nuclear Power – P.15

Solar Energy - P.5 Biogas – P.10 Nuclear Power – P.15. Alternative Energy Source. Defining of Alternative fuels. Any materials/substances can be used as a fuel Include Biodiesel Bioalcohol Eg:Ethanol, Butanol Batteries and Fuel cells etc. Hydrogen Non-fossil methane

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Solar Energy - P.5 Biogas – P.10 Nuclear Power – P.15

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  1. Solar Energy - P.5 Biogas – P.10 Nuclear Power – P.15 Alternative Energy Source

  2. Defining of Alternative fuels • Any materials/substances can be used as a fuel Include • Biodiesel • Bioalcohol Eg:Ethanol, Butanol • Batteries and Fuel cells etc. • Hydrogen • Non-fossil methane • Non-fossil natural gas • Vegetable oil • Other biomass sources.

  3. Renewable Energy • A energy source amount that can be produced at a faster rate than our using rate • For example, Solar energy and Nuclear energy are two different kinds of renewable energy

  4. Importance of Renewable energy • Unlimited supply • Preventing energy resources deficiently • Environmentally friendly

  5. Solar energy The most common renewable energy

  6. Solar energy • Technology of obtaining usable energy from the sun light Use lots of mirrors to reflect the rays onto a boiler then the water in the boiler heats up to become steam that turns the turbine • Collect by solar panels • Most common uses in daily Solar panels

  7. Common uses • Domestic use • Supply heat or hot water • Desalination of seawater • Air-conditioning • Generate electricity • Greenhouse energy supply • Solar energy calculating machine • Solar transportation • Space explore An Earth observation satellite

  8. International • Solar Cities initiative Australia carry out this cause more than 4 city to be Solar City • The first Europe solar factory Spain built it in Seville on 30 March,2007 • Rising the sum of Solar energy California increase the maximum of generate solar energy

  9. Expensive to build panels Seasonal Pros & Cons of Solar energy • Easy to collect • Manifold Using • No by-product • Secure Can’t work in dim light condition

  10. Biogas Natural renewable energy

  11. Biogas • Refers to a gas produced by the • Anaerobic digestion • Fermentation of organic matter manure sewage sludge municipal solid waste biodegradable waste • Containing Methane

  12. Produce of Biogas • Mainly production is anaerobic digestion for treating biodegradable waste Valuable fuel can be produced while destroying pathogens and reducing the volume of wastes Anaerobic digestion component

  13. Methane • Molecular formula CH4 • Not toxic • Highly flammable • May form explosive mixtures with air • Greenhouse gas with a greater global warming potential than CO2 • Attractive fuel • Methane's relative abundance • Clean burning process CH4 + 2O2 → CO2 + 2H2O

  14. Dangerous Forms explosive mixtures Will cause global warming Methane is Greenhouse gas Pros & Cons of Biogas • Reduce the volume of wastes • Cheapest Just reuse wastes

  15. Nuclear Power The most dangerous alternative energy

  16. Nuclear Power • Nuclear power is energy released from the atomic nucleus • Mainly uses Uranium-235 or Plutonium-239 • A Controversial energy • As of 2004,nuclear power provided 6.5% of the world's energy and 15.7% of the world's electricity

  17. How to produce electricity!? • Nuclear fuels break down in a controlled way to generate Heat • The heat is used to boil water to steam • The steam drives the turbine • Turbine produces electricity Producing electricity

  18. Common uses • Mainly for generation of electricity • Heavy-duty weapons use it for power source • Additional, hydrogen production by generation of electricity Factory

  19. Why Nuclear energy cannot replace fossil fuel? • Expensive to construct & run a nuclear power station • The purpose of petroleum is wider • The required technique level is higher • Safer for using fossil fuel • Accidents will destroy the environment • Effect the surrounding population’s health • The wastes are radioactive • The waste heat of produce Nuclear power is difficult to reduce The Nuclear Fuel Cycle

  20. Argument of using Nuclear power!? • The accident of nuclear power station is serious Such as the Chernobyl disaster‏ • May be controlled by careerist to develop nuclear weapon • nuclear warhead • nuclear-armed missile • Environmental impacts of nuclear power are damaged by • Uranium mining which is radioactive effluent emission • waste heat.

  21. Can reduce global warming when produce a great amount of energy Very expensive The wastes are harmful Is serious that the nuclear plant have any accidents Pros & Cons of nuclear power

  22. To summarize

  23. The useful energy in future • We think Biogas is the most suitable in future - Come from nature - Can be produced a lot by populations raising - Repayment is the greatest - Completely absorb the methane by technique arise - Area of wastes occupied will decrease

  24. Disadvantage of develop alternative fuels • Excess resources for testing and producing station • Less range of uses than petroleum • Efficiency is low • Usually, need a lot of technology to support • Some are dangerous to produce or • Difficult to handle( Methane )

  25. End 5B Group 7 |22| Chui Man Kit |31| Lui Ka Kit |32| Lui Tsz Shing |33| Mok Ho Lung |34| Sham Kong Sang

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