energy sources

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topic 7 - energy resources sources of energy sources of energy nature energy is movement or the possibility of creating movement: exists as potential (stored) and kinetic (used) forms. conversion of potential to kinetic. movement states: ordered (mechanical energy) or disordered (thermal energy). temperature can be perceived as a level of disordered energy. major tendency is to move from order to disorder (entropy). importance human activities are dependant on the usage of several forms and sources of energy. energy demands: increased with economic development. the world’s power consumption is about 12 trillion watts a year, with 85% of it from fossil fuels. 1 2 sources of energy 1 chemical fossil fuels (combustion) nuclear uranium (fission of atoms) energy non-renewable renewable chemical muscular (oxidization) nuclear geothermal (conversion) fusion (fusion of hydrogen) gravity tidal, hydraulic (kinetic) indirect solar biomass (photosynthesis) wind (pressure differences) direct solar photovoltaic cell (conversion) 3 fossil fuels are …

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eneration by type of fuel, 2002 9 source: iea 2004 other includes: solar, wind, combustible renewables, geothermal and waste energy sources hubbert’s peak geologist who predicted in the 1950s that oil production in the united states would peak in the early 1970s: us oil production peaked in 1973. assumption of finite resource. production starts at zero. production then rises to a peak which can never be surpassed. peak estimated around 2004-2008: one estimate places it symbolically at thanksgiving 2005. once the peak has been passed, production declines until the resource is depleted. 1 10 image2.emf oleobject1.bin image3.emf oleobject2.bin image4.emf oleobject3.bin image5.emf oleobject4.bin 020406080100120140 hydrogen gasoline natural gas methane methanol ethanol kerosene crude oil coal wood 0%20%40%60%80%100% 15th century mid 19th century early 20th century late 20th century mid 21st century animal biomass coal oil natural gas nuclear hydrogen 0 1000 2000 3000 4000 5000 6000 7000 8000 195019531956195919621965196819711974197719801983198619891992199519982001 natural gas …

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topic 7 - energy resources sources of energy sources of energy nature energy is movement or the possibility of creating movement: exists as potential (stored) and kinetic (used) forms. conversion of potential to kinetic. movement states: ordered (mechanical energy) or disordered (thermal energy). temperature can be perceived as a level of disordered energy. major tendency is to move from order to disorder (entropy). importance human activities are dependant on the usage of several forms and sources of energy. energy demands: increased with economic development. the world’s power consumption is about 12 trillion watts a year, with 85% of it from fossil fuels. 1 2 sources of energy 1 chemical fossil fuels (combustion) nuclear uranium (fission of atoms) energy non-renewable renewable …

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