Energy: Part 3: End Notes

Other Misc Notes

(notes – we consume 73 billion barrels/year of oil. Our vehicles use 167.75 billion gallons of gasoline/day. There are 234,624,000 of them as of 2002. There are only 407,000 alternative fueled vehicles as of yet, and most of them derive from natural gas, which is a much rarer fossil fuel than oil.)
Source: http://www.infoplease.com/ipa/A0004727.html

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7.3 barrels/tonne crude oil
18,300 Btu/lb

5.8E6 Btu/barrel gross
1055.0559 J/Btu
6.1E9 J/barrel

Hoover Dam – 1434 MW output.

This guy thinks the most we can expect from solar is 77MW/km^2.
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Earth’s radiation budget
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1370 W/m^2. About half makes it to Earth. Earth is lighted about half of the time. So you get 340W/m^2 on average.

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This source gives a different energy budget, taking into account clouds, ect.
He has it varying between 342 and -100W/m^2 seasonally. This is net radiation though, so it takes nighttime and Earths outbound radiation into account.

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This site gives some information on photovoltaic conversion.

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More photovoltaics info.