MIT22_081JF10_lec01b - Overview of Energy Use and Related...

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Overview of Energy Use and Related Issues or, Energy - What’s the problem Dr. John C. Wright± MIT - PSFC 9 SEP 2010± S.E. Lecture 2 1
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Introduction W ELL KNOWN ISSUES ± Energy use is increasing Raw fuel reserves are limited ± Pressure on standard of living Global warming S.E. Lecture 2 2
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Introduction Selecting solutions S OME PROPOSED SOLUTIONS ± Replace coal with renewables (wind, solar) Sequester CO2 Switch to biofuels Conservation Add heating insulation Bring back nuclear S.E. Lecture 2 3
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Introduction Selecting solutions M ORE PROPOSED SOLUTIONS ± Drive smaller cars Expand use of geothermal Use oil shale and tar sands for gasoline ± Build smaller houses Increase the efficiency of everything Cars: hybrids, plug-in hybrids, fully electric S.E. Lecture 2 4
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Introduction Selecting solutions S TRATEGY A SSESSMENT± It’s a hodge-podge Are all problems being addressed? Are alternatives compared by means of a cost-benefit analysis? Are we providing sufficient funds for R&D innovations? Does the media do a good job informing the public? S.E. Lecture 2 5
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Introduction Course and this lecture M AIN C OURSE G OALS ± Put logic and order into the energy situation Develop a comprehensive overview Learn how to measure and evaluate options Arm you with the knowledge to make sensible decisions S.E. Lecture 2 6
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Introduction Course and this lecture O UTLINE ± Energy uses Energy consumption ± Fuel reserves The greenhouse effect Energy technologies± S.E. Lecture 2 7
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Energy usage E NERGY S OURCES AND U SES ± A useful breakdown of energy usage Heating - gas, oil Transportation - oil Electricity - coal, nuclear, gas, hydro Heating - anything will do Transportation - need mobile fuel Electricity - lighting, cooling, industry± S.E. Lecture 2 8
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Energy usage US E NERGY U SAGE± Energy by Application in 2007 Electricity Electricity Transportation Heating Heating Transportation (EIA-DoE 2007) 40% 32% 28% S.E. Lecture 2 9
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Energy usage Resource usage breakdowns US O IL U SAGE ± Transportation vs. heating Heating 31% Transportation 69% S.E. Lecture 2 10
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Energy usage Resource usage breakdowns US E LECTRICITY B REAKDOWN ± How do we obtain electricity? Electricity Breakdown 2007 Coal 49% Gas 22% 19% 4% 6% Other Hydro Nuclear S.E. Lecture 2 11
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Energy usage Resource usage breakdowns O THER± Other = 4.1% Oil 1.61% Wood 0.93% 0.41% 0.78% Geothermal 0.36% Solar 0.01% Waste Wind ± S.E. Lecture 2 12
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Energy usage Resource distribution W ORLD
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