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Today

Today. Energy Intensity=energy per unit of benefit (GDP) “EMERGY”– how much energy does it take to extract energy? Reading: wikipedia was ok www.greatchange.org/footnotes-emergy.html All power point images are only for the exclusive use of Phys3070/Envs3070 Spring term 2014.

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Today

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  1. Today Energy Intensity=energy per unit of benefit (GDP) “EMERGY”– how much energy does it take to extract energy? Reading: wikipedia was ok www.greatchange.org/footnotes-emergy.html All power point images are only for the exclusive use of Phys3070/Envs3070 Spring term 2014

  2. Energy INTENSITY Energy used per dollar of GDP, or Carbon Intensity ( later) Carbon/CO2 emitted per dollar of GDP.

  3. ‘Real’ dollar, in 2000

  4. We are getting better at this conversion of energy to prosperity! Energy INTENSITY=Energy consumed per unit of Gross Domestic Product

  5. USA

  6. Energy costs to get energy Costs of discovery, extraction, transportation, processing……. Compared to the energy you can sell

  7. Emergy=Embodied Energy How much energy do we have to into a process to have that process give us energy? Machinery to dig coal, trains to haul the coal, steel to build the power plant, copper to make the generator, energy to grind the coal to dust, energy to scrub the gases, copper for the transmission wires,….…… A systems accounting problem.

  8. A Prosperous Way Down :Principles and Policies Howard T. Odum and Elizabeth C. Odum University Press of Colorado or Environment and Society in Florida Howard T. Odum

  9. Biofuels example

  10. Examples: emergy yield ratio Farm windmill, 17 mph 0.03 Sugarcane ethanol 1.14 Natural gas/offshore 6.8 Natural gas/onshore 10.3 Century-old rainforest 12.0 emergy yield/emergy of all inputs from the economy

  11. Late registration? Start with //www.colorado.edu/physics/CAPA/Cindex.html Click on ‘late enrollment’

  12. PIN comes to you by email. Then, //capa.colorado.edu

  13. Next week Fossil fuels Monday– Oil. Where is it and how do we get it? R and K 2.1—2.7 CAPA #1 due by 0900! Wednesday- Future of oil, Hubbert Curves //en.wikipedia.org/wiki/Peak-oil Friday-Natural gas- where is it and how do we get it, conventionally? R and K 2.8—2.11

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