New answers tagged wind-power
3
votes
Why are wind turbines installed slightly "nose up" as opposed to the blade disk being perpendicular to the ground?
The blades bend backwards under wind forces and if they hit the tower its frequently catastrophic - the tower wall buckles, weakening it, and the blade disintegrates causing the fast spinning rotor to ...
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2
votes
Why are wind turbines installed slightly "nose up" as opposed to the blade disk being perpendicular to the ground?
Because under heavy winds the blades can bend back slightly. The angle ensure that even if they do so, they won't be fouled by the mast.
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4
votes
Why are wind turbines installed slightly "nose up" as opposed to the blade disk being perpendicular to the ground?
Most airfoil blade shapes; forward orientation is slightly bent upward 10-15 degrees because this creates the most lift with the least amount of drag.
The now slightly turbulent air flow isn't just ...
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26
votes
Why are wind turbines installed slightly "nose up" as opposed to the blade disk being perpendicular to the ground?
Short answer- because the pylon causes too much interference otherwise. Tipping the rotor up increases the clearance to the pylon and reduces flow perturbations and their associated vibration problems....
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1
vote
Wind farms that wind up in the wind, and then unwind producing energy when the wind is still
Energy storage is a tricky challenge.
Batteries are one, but the cost of even city scale single day's storage is gargantuan.
Others have proposed using renewable energy to generate hydrogen or in-situ ...
- 544
6
votes
Wind farms that wind up in the wind, and then unwind producing energy when the wind is still
I suppose what you had in mind with your question was something like, every single turbine winches up a heavy weight to its tower while surplus energy is available, then lowers it again to recuperate ...
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0
votes
Wind farms that wind up in the wind, and then unwind producing energy when the wind is still
Not a full answer, but an addition to the existing answers. I see that most of the other users restricted their options for energy storage to the systems that are more publicised, not the ones that ...
- 67
5
votes
Wind farms that wind up in the wind, and then unwind producing energy when the wind is still
You're describing a Gravity Battery. While the other answers have pointed out that water is the most common lifted weight, EnergyVault is a Swiss company that's basically lifting concrete blocks. The ...
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3
votes
Wind farms that wind up in the wind, and then unwind producing energy when the wind is still
As other answers have pointed out, the key to a system that utilizes renewable energy sources with an energy storage backup envisioned by the question is the ability to store large amounts of energy ...
- 131
11
votes
Wind farms that wind up in the wind, and then unwind producing energy when the wind is still
The storage part of the RES systems is probably the biggest challenge today.
There are several ways to store energy. By far the most used way today is Pumped storage hydroelecticity systems.
...
- 24.3k
6
votes
Wind farms that wind up in the wind, and then unwind producing energy when the wind is still
You've described energy storage, or physical batteries. You wouldn't need half of each wind farm dedicated to this; you would simply store the excess, beyond what is used at a given time. It's not ...
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