Renewable Energy

1
Chapter 15

• Renewable Energy

2
Renewable Energy Sources
3
Solar Energy Flat Panel Collector
4
Solar Energy Water Heater
5
Solar Energy Space Heating
6
Solar Energy Passive Heating
7
Solar Energy Landscaping
8
Solar Energy Photovoltaic Cell
These cells transform solar energy directly into
electrical energy. You will find them in your
calculator!
9
Solar Energy The Market
As the cost of solar energy has declined, the
number of users has increased
10
Solar Energy Hydrogen

• Use solar energy to remove H from water and then
  use the H as fuel in automobile engines.
• Use hydrogen fuel cells (at left) to run electric
  cars. As yet they are expensive and the
  infrastructure to provide H for consumers does
  not exist.

11
Indirect Solar Energy

• Hydropower clean, but environmental degradation
• Wind Power clean, some dislike appearance, can
  kill birds
• Biomass historically useful, can not be done
  with large populations

12
Additional Renewable Energy Options

• Geothermal uses heat from Earth, or hot water
  from springs
• Tidal essentially a water wheel for the tides
• Ocean Thermal Energy Conversion uses heat
  differential from upper to lower ocean

13
Policy

• Energy Star and Green Light energy efficient
  appliances
• Climate Change Technology Initiative RD to
  reduce greenhouse gas emissions
• Global Change Research Program money to support
  research on climate change
• Deregulation of Electric Power Industry allows
  consumers to choose greener electricity
  sources

14
Summary

• Renewable Energy Sources
• Solar Energy flat panels, water heaters, space
  heaters, passive heating, landscaping,
  photovoltaic cells, market share, hydrogen fuel
  cells
• Indirect Solar Energy hydropower, wind power,
  biomass
• Additional Renewable Energy Options geothermal,
  tidal, ocean thermal energy conversion
• Policy