by iisthatwhichiis » Tue 27 Sep 2005, 22:09:56

Hi Omar, All,
Omar writes:
$this->bbcode_second_pass_quote('', 'S')olar energy is diffuse, unreliable and expensive. That number is probably an average. It neglects the fact that the earth is 70%, efficencies in solar power are the worst in the energy business, production costs for solar panels are still magnitudes of order above commerical utilization and at its core, solar power is simply too intermittant for a global economy.
I did not mean to imply that Solar Power was the way to go but rather that it is the way that Nature/Mother Earth has accumulated most of the current non renewable energy that mankind currently uses.
Radioactive materials, as I understand it, are left over from the decay of previous stars and mankind uses power from this source by both Fission power plants (directly) and Geothermal power plants (indirectly).
My point in the above post was that when all of the above sources are used up, and the sun stops sending energy to us, mankind is in deep doodoo. The earth will continue on in some form but we will not inhabit it.
Each of the various power sources are limited in scope and usability.
As you mention Solar energy is diffuse, unreliable and expensive, But it is efficient to heat hot water and space heating with proper use of trombe walls or other heat sinks.
Nuclear Fission Power difficulties seems to be threefold:
1. Political
2. Storage space for the waste. This probably could be solved by remixing it with the ore and putting it back in the mines it came out of. Contamination of water sources then becomes a problem.
3. Meltdown or explosion which makes the surrounding area uninhabitable for hundreds of years.
Geothermal works well in Iceland, New Zealand, California and Hawaii. Corrosion in high sulfur areas is a problem.
Wind power also is intermitant and like solar requires some type of storage.
Electric power for automobles seems to be a better and more efficient way to move autos and trucks than gasoline, if it were not for the resistance and greed of the oil companies.
Hydro electric is developed almost to the max.
Hydrogen like gasoline is primarily a storage medium.
So what is left?
Wave power? Tidal power? Fusion? OTEC?
