The same principle have been posted many times. The only important thing, is the surface area of the collector, that where the energy comme from.
In this case, think about the cost of all this structure vs the same area swept by a blade. The cost of the simple blade is always lower than the same area of 'concentrating funnel'.
Right now they are building turbine with blade of 90m of diameter, imagine building a concentrating structure of the same size.
The same principle have been posted many times. The only important thing, is the surface area of the collector, that where the energy comme from.
In this case, think about the cost of all this structure vs the same area swept by a blade. The cost of the simple blade is always lower than the same area of 'concentrating funnel'.
Right now they are building turbine with blade of 90m of diameter, imagine building a concentrating structure of the same size.