No the Spanish enclosed versions are 25 per cent less efficient per given wind velocity and flow versus the exposed tower turbine blades....Yes you’d need a higher minimum speed to get them turning but once turning and brought up to speed, you have energy flow similar to the open 3 blade monsters.
The enclosed are more durable and don’t break down as frequently. They are more protected from the elements other than the wind. So the 25 per cent less efficiency start up speed is more than made up for by the savings in not having to repair or replace them as frequently. The turbine design is different...more like jet turbines, smaller blades at top and larger at bottom.
In other words, is the benefit of horizontal turbines that you don't see them when driving by?
If you had enclosed wind turbines around here they would look like a horizontal popsicle in a week. They actually paint the blades black to mitigate icing on the ones we have already.
Like many alternative energy concepts it is fascinating from an elegant engineering perspective but impractical and fundamentally unworkable as a form of large scale utility grade clean power
Not sure if you are aware of this ( few are), but the term politically correct was first coined back in 1917, the early days of Post Revolutionary Soviet Russia, for a totally unworkable scheme by two uneducated, peasant class Heros of the Revolution who came up with a crazy idea on how to generate “ socialist electric power” based on superior, sound communist theory and principles.
A huge amount of scarce and precious post revolutionary Russian assets and resources were squandered on this scheme to demonstrate the superiority of Socialist Power based on Communist theory to the capitalist world and its utter and complete failure was a serious blow to Soviet economic development. This monumental failure and waste of resources ( just the first of many for the USSR) in the pursuit science and technology based on communist ideology was excused and actually praised by propaganda arm of the Soviet Communist Party Apparatus on the grounds that while it was a total failure and technically and economically the incorrect thing to do , it was done by committed communists so, their words, “ the project was done by two stalwarts of the Revolution who were proving the superiority of Communism so, while a failure, it was the Politically Correct thing to do”
The term stuck as an ironic euphemistic phrase to refer the many politically and ideologically driven scientific, technological, economic and sociological failures of the Soviet Union over the years.
Very little has changed since then it seems
Still a very bad idea