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Old 01-09-2019, 07:29 PM   #4477 (permalink)
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178 meter tall tower topped by 3.4MW turbine with a predicted 35% capacity factor.

So. To make 1/2(from onshore wind) of 1/2(efficiency gains from full electrification) of Germany's total energy (0.44 TW currently) with these tall turbines needs 0.1 TW total from onshore wind.
3.4 MW turbines on 170m towers is apparently about as big as it gets due to limitations of transporting larger nacelles or blades over roads. 35% CF is predicted. Which is 10% higher than the current world average for onshore wind due to the extremely tall towers.
This would be 83,000 wind turbines in total.
5 rotor diameters spacing between each one to avoid dominoes from a tossed blade, and to reduce wind shadows is 1 per km2.
83,000 km2 is 24% of the land area of Germany fully populated with wind turbines. But 24% of Germany is not all of adequate wind resources.
squeezing them to 3 rotor diameters spacing gets it down to 50,000 km2.
14% of the total land area.
To build them all in 20 years so that we can start rebuilding them all over again as they wear out is 11 per day. And then start over with rebuilding them all continually at 11 per day forever. For 1/2 of 1/2 of Germany's current energy.
Multiply this by 38 for the world.
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