Sustainable EnergyAfter studying Chapter 20 you should know about:Energy Conservation and CogenerationEnergy policyAlternative energy sources & their environ. effectsSolar, Wind, Biomass, Hydroelectric, Hydrogen, & Geothermal Tapping solar energy for heatingPassive vs. Active solar technologyThermal and PV solar energy for electricityFuel cells
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Utilization Efficiencies•Utilization Efficiencies-Most of the potential energy in fuel (coal & oil) is lost as waste heatHi oil prices in the 70s, avg US auto gas mileageÇfrom 13 mpg in ‘75 to 28.8 mpg in ‘88Falling fuel pricesof the ‘80s discouraged further conservationInsulation(quick, cheap, effective) - today’s average new home uses 50% fuel used to heat/cool a house built in 1974 per m2(but avg home is bigger now!)New national standards:¾New washing machines will use 35% less water¾Cuts US water use by 40 T liters annually¾CO2standards currently being contested by mfg indus.