Christophe wrote:2 to 3 times more energy supposes the exploitation of low and high speed winds ... where conventional wind turbines fish ....
Otherwise it is a surunitaire wind turbine !!
If you compare the power curves of this wind turbine:
and that of the "standard" wind turbine of roughly equivalent power:
You will see that the weak winds are not exploited in any of the cases.
On the other hand, the maximum speed tested in the wind tunnel for the first one is given at 45m / s (162Km / h) which greatly exceeds the 25m / s (90Km / h) commonly accepted as maximum wind speed before a standard wind turbine does puts on a curtain.
So that, if the top curves continued to the right, the "plateau" of the top one would continue at least up to 45m / s while the lower one would plunge to 0 to 25m / s (curtain blades ).
So,
theoretically, the first having a greater range of use, its yield over the year is thereby increased.
Now, in practice, count the days when the wind is between 90Km / h and 162km / h ....