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Old 12-14-2018, 01:26 PM   #4100 (permalink)
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Originally Posted by sendler View Post
2:1 efficiency improvement leaves 8 TW average for the world to replace with solar or wind. 13 million 2MW turbines at 33% CF. 170 tons of materials each. 2.7 Gigatons.
1 billion cars in the world. 1.7 tons each. 1.7 Gigatons
We probably ought to decide which to really focus on next.

One construction crew can install and commision 50 2MW turbines per year. Capacity factor of 33% gives 33MW actual capacity per year per crew.
24 million crew years to install 8 TW of wind. If they last 24 years, we need 1 million crews working continously forever to power the world with wind. More or less. Towers last longer so the second and third time through would be easier.
20 hours of storage for the world would require 1.6 million BigF'nBatteries at 100 MWh each. 250 GigaFactories for 25 years and then forever to keep recycling them. If they could last 25 years.
If I buy a Powerwall and drive a Prius, can I smug around town in light of this information?

Originally Posted by RedDevil View Post
How many people work in the energy industry now? Should be millions too.
Same people, different jobs.
sendler said a million crews, not million people. There are many people on a crew.
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