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Originally Posted by Guest
Let me try again to explain entropy. You have tons of renewable energy systems in The Villages. They are called solar pool heaters. You are correct it takes oil and it takes energy to refine it, make the plastic and mold the plastic. How much does this energy cost, I don't know but since I know of no subsidies for solar pool heaters I think we can guess it's a small part of the purchase price. Purchase price will include other costs, labor, taxes, profit to name a few. They are renewable energy because they turn sun light into hot water. It would be much simpler to hook you pool up to your hot water heater and use coal derived electricity. I'm sure if you talk to your neighbors they will say the solar heater payed for itself many times over compared to an electric heater. Some day the solar heather will wear out, it will start to leak and not be fixable. You can't get the entropy back out of the system because their is no good way to turn the solar heater back into oil and unlock the energy used to make the plastic. However it is such a insignificant cost you don't care. A solar pool heater and a windmill are the same concept, turn one form of energy into another.
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It's NOT a comparison...it's apples to oranges...since when did we add the sun? We are SO far from the original premise. Heating water is comparable to driving an electric car via batteries?
You said batteries can take over for oil...can replace fuel. I said they can't.
So...prove it.
Get me the TOTAL cost...in ENERGY...to build a battery...energy used charging it...and compare that to it's total energy output over it's life.
It won't be CLOSE to the amount of energy used to create it. It's energy negative...there is negative EREI (energy return for energy invested). It takes more energy to make your battery than it will ever produce. So WHY "switch"? You're going to use more energy than you gain.
A barrel of oil contains the equivalent of 8 "man years" of "energy", of "work". One man working continuously, no breaks, no days off, 24/7, for 8 years in ONE barrel of oil.
How much is in your battery? REMEMBER...EVERY CHARGE has energy costs. You say: "I can use the sun to charge the battery...it's free...solar is free".
Au contraire...you MUST factor in the ENERGY COST of your solar charger. The sun's energy is HARDLY free. Solar panels take a lot of energy to mine, refine, manufacture, the electronics need fabrication plants. Copper needs mining, can't use plastic for anything...it's made of oil.
A barrel of oil is $60...a barrel of diesel is $125. How much are your batteries?
Batteries are NOT going to REPLACE fuels.
Oh...another thing...the power grid. It can't handle adding 250 million electric cars. You DO know WHY they want us to conserve electricity? Why everything is "Energy star"? Because there's NOT ENOUGH to go around during peak demands. How do you handle road trips? Everyone can't charge at night.