Energy Resources Chapter 5 Section 4 Energy Conservation Notes 5-4

Conservation and Efficiency Fossil Fuels are nonrenewable resources Fossil Fuels are nonrenewable resources Find new sources of energy Find new sources of energy Conserve the fossil fuels we are using now Conserve the fossil fuels we are using now Energy conservation: Energy conservation: Reducing energy use Reducing energy use Ex: Using a bike instead of a car Ex: Using a bike instead of a car

Energy Conservation Other Examples: Other Examples:

Conservation and Efficiency Efficiency: Efficiency: Percentage of energy that is used to perform work Percentage of energy that is used to perform work Get as much out of the fuel as possible Get as much out of the fuel as possible Lights: Lights: Only 10 % of the electricity from an incandescent light bulb is turned into light; the rest is lost as heat Only 10 % of the electricity from an incandescent light bulb is turned into light; the rest is lost as heat Fluorescent bulbs are more efficient; use only ¼ the energy Fluorescent bulbs are more efficient; use only ¼ the energy

Conservation and Efficiency Heating and Cooling: Heating and Cooling: Insulation: layer of material that helps block the transfer of heat Insulation: layer of material that helps block the transfer of heat Helps with heating and cooling Helps with heating and cooling Pink insulation: Pink insulation: Made of thin pieces of fiberglass Made of thin pieces of fiberglass Holds air in pockets; air works as an insulator Holds air in pockets; air works as an insulator Fiberglass 15 cm thick insulates as well as a brick wall 2 m thick or a stone wall 6 m thick Fiberglass 15 cm thick insulates as well as a brick wall 2 m thick or a stone wall 6 m thick

Conservation and Efficiency Window are a big problem with losing heat or gaining heat. Window are a big problem with losing heat or gaining heat. Most windows that were put in place (made) after 1980 are double paned Most windows that were put in place (made) after 1980 are double paned They have two pieces of glass with air between the pieces. They have two pieces of glass with air between the pieces. The air acts as an insulator that helps keep heat in during the winter and out during the summer. The air acts as an insulator that helps keep heat in during the winter and out during the summer.

Conservation and Efficiency Transportation: Transportation: Energy efficiency of vehicles is improving Energy efficiency of vehicles is improving President Obama’s law to make vehicles more efficient by President Obama’s law to make vehicles more efficient by Use less cars by carpooling or using public transportation Use less cars by carpooling or using public transportation They now have carpooling lanes in the city. They now have carpooling lanes in the city. Alternative fuels: ethanol, electricity, hydrogen fuel cells Alternative fuels: ethanol, electricity, hydrogen fuel cells

Energy Conservation Energy Conservation: reduce energy use. Energy Conservation: reduce energy use. Walk instead of drive Walk instead of drive Carpool if you have to drive Carpool if you have to drive Recycle Recycle Use fans instead of air conditioning Use fans instead of air conditioning Turn off lights and TV when leaving the room Turn off lights and TV when leaving the room