Lecture 2 - Energy Sources, Uses and Conversion What really...

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Energy Sources, Uses and Conversion What really controls energy efficiency?
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Engineering Issues with Energy Development Primary Source of Energy Fossil Fuels Nuclear Renewables Disposal of Waste Heat Thermal pollution of aquatic environment Cooling towers Economies of scale Why are large power plants more efficient than smaller plants? Environmental Impact Community/industry integration
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Forms of Energy Mechanical energy Flowing rivers, wind Electrical energy Batteries, Electromagnetic Field Chemical Energy Released in Chemical Reactions Thermal Energy Heat (released by chemical reactions, nuclear reactions, geothermal sources, etc.)
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What are the uses of different forms of energy? Mechanical Energy Operate equipment (pump water, grind grains, weaving machines, etc.) Moving vehicles Conversion into electrical energy Chemical Energy Produce new chemicals Make heat Conversion into electrical energy (batteries, fuel cells) Thermal Energy Space heating, hot water Materials processing Conversion to Electrical Energy Electrical Energy Most flexible form of energy. Easily transmitted and converted to other forms of energy Radiant Energy Solar radiation Lighting
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Availability vs. Utility Electrical Energy is most useful. Can be converted into all the other types of energy. Chemical Energy is best for storage (batteries) and transmission (gas and oil) Thermal Energy is most available. Can be produced in almost any location by burning fuels, electrical dissipation
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What are the sources of energy? • Chemical – Fossil fuels (coal, oil, natural gas) –B iomass • Agricultural (grains, plants, animals) • Aquatic (fish, algae, photo-plankton) • Mechanical – Hydro (rivers, tidal) –W ind • Radiant – Solar • Nuclear
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World Energy Consumption by Region 0 1,000 ,000 2,000 3,000 4,000 5,000 6,000 7,000
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This note was uploaded on 09/22/2008 for the course MAE 228 taught by Professor Yiguangju,jayb.benziger,roberth.socolow during the Fall '08 term at Princeton.

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Lecture 2 - Energy Sources, Uses and Conversion What really...

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