P110_2008_Week_2

P110_2008_Week_2 - U.S. Wind power since 1995 (mQuads...

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U.S. Wind power since 1995 (mQuads energydelivered/year) 0 50 100 150 200 250 300 350 1994 1999 2004 Series1 Series2 From EIA website Annual Energy Report: 2007 20.7% annual growth DATA FIT
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Hubbert Curve Exponential extrapolation World Coal Production Curve Data Finite resource -> Final answer is 0 Exponential growth CANNOT be sustained in a World of FINITE resources!!
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Renewable Resource A resource that can be replenished on a time scale much shorter than the lifetime of the civilization exploiting it (e.g. wood, crops, hydro- electric). A resources whose expected lifetime is much longer than the lifetime of the civilization exploiting it (e.g. solar, wind, tidal). (NOTE: the book says “a resource that cannot be used up”, technically there is no such thing, but from a practical matter it is the same as above).
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Energy Conversions (Table 2.2) Automatically Happens! digestion thermal A key question to consider is with what EFFICIENCY can each of these Conversions be accomplished (Useful energy output/ total energy input)
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Energy Conversions Thermal energy in the sun is converted to radiant energy (light, IR, Visible, UV). Solar cell converts radiant energy to electricity (low efficiency)
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P110_2008_Week_2 - U.S. Wind power since 1995 (mQuads...

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