On 1/12/2013 2:35 AM, Roger Clough wrote:
The unpredictability of solar energy I've lost the page ref for the graph below, but it's typical of numerous other graphs of the daily variation in solar energy on the internet. (For a comparison see solar variations on http://www.bigindianabass.com/big_indiana_bass/2010/01/yearly-water-temps-precip-and-solar-energy.html ) The hourly variation would be much worse, since the sun does not shine at night. The variation from day to day is unpredicatable and enormous, going from near 0 Ly to almost 100 Ly. This is probably due to variable cloud cover, not auto exhaust emissions. I'll stay with conventional electric power, thank you very much.*Ly. *Langley, a measurement of solar energy. One langley is equal to one gram-calorie per square centimeter. A gram-calorie is the amount of heat required to raise the temperature of one gram of water one degree Celsius.
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