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Worldwide Energy Production. 2000. 2050 ?. Sustainable Energy. Chapter 22. ENERGY FROM BIOMASS. Photosynthesis 6H 2 0+6CO 2 + solar energy = C 6 H 12 O 6 +6O 2. Fuelwood. Other Sources of Biomass Energy. Dung Where other fuel is in short supply, people often dry and burn animal dung.

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worldwide energy production
Worldwide Energy Production

2000

2050?

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sustainable energy

Sustainable Energy

Chapter 22

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energy from biomass
ENERGY FROM BIOMASS
  • Photosynthesis
    • 6H20+6CO2 + solar energy = C6H12O6+6O2

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fuelwood
Fuelwood

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other sources of biomass energy
Other Sources of Biomass Energy
  • Dung
    • Where other fuel is in short supply, people often dry and burn animal dung.
  • Methane
    • Methane is main component of natural gas produced by anaerobic decomposition.
  • Negative Impacts

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energy from earth s forces hydropower
ENERGY FROM EARTH\'S FORCESHydropower

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dam drawbacks
Dam Drawbacks
  • Human Displacement
  • Ecosystem Destruction
  • Wildlife Losses
  • Large-Scale Flooding Due to Dam Failures
  • Sedimentation
  • Herbicide Contamination
  • Evaporative Losses
  • Nutrient Flow Retardation

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dam alternatives
Dam Alternatives
  • Low-Head Hydropower - Extract energy from small headwater dams.
  • Run-of-River Flow - Submerged directly in stream and usually do not require dam or diversion structure.
  • Micro-Hyrdo Generators - Small versions designed to supply power to single homes.

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other sources of energy from earth s forces
Other Sources of Energy from Earth\'s Forces
  • Tidal and Wave Energy
    • Ocean tides and waves contain enormous amounts of energy that can be harnessed.
  • Ocean Thermal Electric Conversion
    • Heat from sun-warmed upper ocean layers is used to evaporate a working fluid, such as ammonia, which has a low boiling point.
  • Geothermal Energy
    • High-pressure, high-temperature steam fields exist below the earth’s surface.

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wind energy
Wind Energy

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wind energy in canada
Wind Energy in Canada

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cypress wind power facility
Cypress Wind Power Facility

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negative impacts of wind energy
Negative Impacts of Wind Energy
  • Interrupt view in remote places
  • Noise
  • Destroy sense of isolation
  • Potential bird kills

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solar energy
SOLAR ENERGY

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solar energy16
Solar Energy
  • Passive Solar Heat - Using absorptive structures with no moving parts to gather and hold heat.
  • Active Solar Heat - Generally pump heat- absorbing medium through a collector, rather than passively collecting heat in a stationary object.
  • Eutectic Chemicals are also used to store large amounts of energy in a small volume.

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photovoltaic solar energy
Photovoltaic Solar Energy

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storing electrical energy
Storing Electrical Energy
  • Electrical energy storage is difficult and expensive.
    • Lead-acid batteries are heavy and have low energy density.
    • Metal-gas batteries are inexpensive and have high energy densities, but short lives.
    • Alkali-metal batteries have high storage capacity, but are more expensive.
    • Lithium batteries have very long lives, and store large amounts of energy, but are very expensive.

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promoting renewable energy
Promoting Renewable Energy
  • Proposed Energy Conservation Policies:
    • Distributional Surcharges
      • Small fee levied on all utility customers.
    • Renewable Portfolio
      • Suppliers must get minimum percentage of power from renewable sources.
    • Green Pricing
      • Allows utilities to profit from conservation programs and charge premium prices for renewable energy.

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promoting renewable energy21
Promoting Renewable Energy
  • "Negawatt" Programs
    • It is much less expensive to finance conservation projects than to build new power plants.
  • Cogeneration
    • Simultaneous production of both electricity and steam, or hot water, in the same plant.

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energy costs
Energy Costs

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conservation
CONSERVATION
  • Utilization Efficiencies describe how well available energy is used for its intended purpose.
  • Energy Efficiency is a measure of energy produced compared to energy consumed.
  • Net Energy Yield - Based on total useful energy produced during the lifetime of an entire energy system, minus the energy required to make useful energy available.

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energy conversion efficiencies
Energy Conversion Efficiencies

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net energy yields
Net Energy Yields

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links
Links
  • Saskatchewan Waste Reduction Council (www.saskwastereduction.ca)
  • Canadian Wind Energy Association (www.canwea.ca)
  • Canadian Hydro Developers, Inc. (www.canhydro.com)
  • Solar Energy Society of Canada (www.solarenergysociety.ca)
  • Canadian Renewable Fuels Association (www.greenfuels.org)

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