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Title:

Environment 7/e

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... Technology Energy Solution Heating Buildings and Water Passive solar energy Solar Sunspace Utilizes passive solar energy to heat and cool homes Can be ... – PowerPoint PPT presentation

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Title: Environment 7/e


1
Chapter 13 Renewable Energy and Conservation
2
Overview of Chapter 13
  • Direct Solar Energy
  • Indirect Solar Energy
  • Wind
  • Biomass
  • Hydropower
  • Geothermal
  • Tidal
  • High and Low Technology Energy Solution

3
Heating Buildings and Water
  • Passive solar energy

4
Solar Sunspace
  • Utilizes passive solar energy to heat and cool
    homes
  • Can be added to existing homes

5
Heating Buildings and Water
  • Active Solar Energy
  • System of collecting and absorbing the suns
    energy, and using pumps or fans distribute the
    collected heat
  • Typically used to heat water
  • 8 of energy in US is used to heat water
  • This technology could supply large amount of US
    energy demand

6
Heating Buildings and Water
  • Solar Thermal Electric Generation
  • Means of producing electricity in which the suns
    energy is concentrated by mirrors or lenses to
    either heat a fluid filled pipe or drive a
    Stirling engine
  • More efficient than other solar technologies
  • No air pollution
  • No contribution to global warming or acid
    precipitation

7
Solar Thermal Electric Generation

8
Photovoltaic Solar Cells
  • A wafer or thin film that is treated with certain
    metals so that they generate electricity when
    they absorb solar energy

9
Cost of Electrical Power Plants
  • Biomass
  • used as fuel
  • Wind energy
  • Hydropower
  • Form of renewable energy reliant on flowing or
    falling water to generate mechanical energy or
    electricity

10
Biomass
  • Advantages
  • Reduces dependence on fossil fuels
  • Often uses waste materials
  • If trees are planted at same rate biomass is
    combusted, no net increase in atmospheric CO2
  • Disadvantages
  • Requires land, water and fossil fuel energy
  • Can lead to
  • Deforestation
  • Desertification
  • Soil erosion

11
Wind Energy
  • Few environmental problems
  • Kills birds and bats
  • No waste - clean source of energy
  • Biggest constraints
  • Cost
  • Public resistance (NIMBY)

12
Hydropower

13
Hydropower

14
Hydrogen as a Fuel Source
  • Hydrogen gas (H2)
  • Comprised of two hydrogen molecules
  • Large amounts of available energy
  • Explodes when combined with oxygen releasing
    energy and forming water

15
Energy Consumption Trends and Economics

16
Energy Savings in Commercial Buildings

17
Saving Energy at Home
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