Pour des éoliennes à transmission directe ou sans multiplicateur, le générateur est le cœur du système. Dans la production d’énergie, de la chaleur est générée sur les bobinages. Cette chaleur doit être évacuée afin de refroidir le générateur. Pour les grandes éoliennes multi-mégawatts, un refroidissement par air/eau est utilisé pour refroidir les générateurs.
Outre la surveillance de température du générateur et du fluide de refroidissement, il est également important de surveiller la pression et le débit de refroidissement. Si le système de refroidissement tombe en panne, la centrale doit être arrêtée afin d’éviter une surchauffe du générateur.
Translation:
Generator cooling
For wind turbines with direct transmission or without a gearbox, the generator is the heart of the system. In power generation, heat is generated on the windings. This heat must be removed in order to cool the generator. For large multi-megawatt wind turbines, air / water cooling is used to cool the generators.
In addition to monitoring generator and coolant temperature, it is also important to monitor cooling pressure and flow. If the cooling system fails, the power plant must be shut down to prevent the generator from overheating.
So maybe a cooled generator could be used for power generation, as well as a device that converts energy into heating.
I have tried flying ring discs: this works very well, perhaps better than solid discs.
I tried taping a three-bladed propeller inside the 33 cm diameter orange model (see photo): no rotation with my fan as opposed to the propeller alone. On the throw, the whole thing went 3 to 4 times less far than the ring alone.
Not very promising, at least if the blades are inside. Perhaps it would be better with many thin blades like spokes, providing both rigidity when scaling up, and rotation. See perhaps with outer blades in addition.
Better (in front of the same fan as previously where there was no rotation) for this counter-rotating helicopter rotor: about 200 rpm for both annular rings (see the photos below: orange 0.33 m diameter, blue 0.25 m diameter), so less (but not far less) than 3.9–6.14 rps when a rotating disk is launched, and far less (half) than the rotor alone.
Generally the ring slows down the rotation, regardless of the configuration. Its annular band should be much less wide, but then you lose lift and gyroscopic effect…
A bad idea (one more) came back to me after a few years. It involves a hydrogenerator that falls to the bottom of the water while spinning, then is lifted by a kite, still spinning (but unfortunately in the opposite direction, which slows it down at each half cycle). We could call this a gravity hydrogenerator kite. This is a reeling kite with power reel-in and reel-out phases. Here are the two versions, which are identical. Naturally, this is for remote areas.
A gravity hydrogenerator could also be a storage method if the waters are deep enough. After gravity use, the hydrogenerator is lifted by the kite for a new potential cycle, being then fixed under the floating barge (like on the first sketch, but using a waterproof magnet instead of a rebound plate (7)), a bit like Pumped-storage hydroelectricity - Wikipedia.
