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chapter20 - Sustainable Energy After studying Chapter 20...

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Sustainable Energy After studying Chapter 20 you should know about: Energy Conservation and Cogeneration Energy policy Alternative energy sources & their environ. effects Solar, Wind, Biomass, Hydroelectric, Hydrogen, & Geothermal Tapping solar energy for heating Passive vs . Active solar technology Thermal and PV solar energy for electricity Fuel cells
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Utilization Efficiencies Utilization Efficiencies - Most of the potential energy in fuel (coal & oil) is lost as waste heat Hi oil prices in the 70s, avg US auto gas mileage Ç from 13 mpg in ‘75 to 28.8 mpg in ‘88 Falling fuel prices of the ‘80s discouraged further conservation Insulation (quick, cheap, effective) - today’s average new home uses 50% fuel used to heat/cool a house built in 1974 per m 2 (but avg home is bigger now!) New national standards: ¾ New washing machines will use 35% less water ¾ Cuts US water use by 40 T liters annually ¾ CO 2 standards currently being contested by mfg indus.
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