http://www.pes21.com
Let me show you advanced new technology for vertical wind turbine that is absolutely different mechanism comparing with current one, something may be similar one such as this type but this is completely different principle of the turbine rotation by wind force, so far now, All most wind turbine regardless of horizontal or vertical type is rotating by wind velocity force, however, this wind turbine is rotated by pressure different force caused by wind velocity. At the moment, we need to know that atmosphere at any condition, wind collection is not true because there is no static pressure different atmosphere, this means that no principle of continuity, no Bernoulli's ventury effect is available atmosphere, so what we called building wind is not happens actually in other area beyond the building where wind velocity is exactly same velocity between two building.

For this principle of the wind turbine, we can find no wind zone in centroid of the wind turbine rotor because wind velocity is completely blocked by wind partition installed at 90 degree for each one, so this wind turbine rotated by only pressure different energy not by wind velocity.

This model test shows rotation performance for each stage, I installed different wind turbine type. shortly wind turbine is divided into two type
the first one is a drag type and another one is a lift type,So I installed it from the first stage.

1. Twin lift blade
2. Single drag blade
3. Single lift blade
4. Twin drag blade

Take look at the top of this stage, I installed same wind turbine of Single lift blade at atmosphere condition. Finally I could not see Turbine rotating due to low wind velocity of 2m/s.
Also, I can see that efficiency of each wind turbine comparing two type of the wind turbine
the best efficiency of the wind turbine is twin lift blade enclosed with wind block partition. I never seen this kind of a blade in current vertical wind turbine.