34. Renewable Energy A reality check on renewables - David 2 days ago   48:03

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The Atmosphere, the Ocean and Environmental Change (GG 140)

Renewable energy sources are discussed. These include wind energy, solar energy, biomass energy and geothermal energy. Energy from wind is acquired through the use of large wind turbines. These turbines ideally need to be located in areas where there is strong wind and low atmospheric turbulence. Solar power is collected using both photovoltaic solar cells and concentrated solar power. Energy from biomass can be produced in two ways: burning biomass to generate electricity or fermentation to produce fuel ethanol. Geothermal energy is produced by pumping water below the earth's surface into areas of hot rocks which heats the water and creates steam. This steam is then run through a turbine to produce power.

00:00 - Chapter 1. Renewable Energy Sources
02:20 - Chapter 2. Wind Energy
35:19 - Chapter 3. Solar Power
42:18 - Chapter 4. Biomass Energy
45:14 - Chapter 5. Geothermal Energy
46:45 - Chapter 6. Electricity Sources

Complete course materials are available at the Open Yale Courses website: http://oyc.yale.edu

This course was recorded in Fall 2011.
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A reality check on renewables - David 34. Renewable Energy 2 days ago   18:35

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How much land mass would renewables need to power a nation like the UK? An entire country's worth. In this pragmatic talk, David MacKay tours the basic mathematics that show worrying limitations on our sustainable energy options and explains why we should pursue them anyway. (Filmed at TEDxWarwick.)

Lesson by David MacKay.

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