Wind dam can be used with Vertical Axis Wind Turbines (VAWT). Primarily it concerns Darrieus vertical axis wind turbines.

The basic theoretical advantages of VAWT are as follows:

• it can operate with wind flowing in any direction, i.e. you do not need a yaw mechanism to turn the rotor against the wind;
• you may place the generator, gearbox etc. on the ground and you may not need a tower for the machine;
• blade production technology is based on aluminium pressing that is five times cheaper than to produce blades from composite materials, as in the propeller-type rotor.

• wind speeds are very low close to ground level, so although you may save a tower, wind speeds will be very low on the lower part of your rotor;
• the overall efficiency of the vertical axis machines is not impressive;
• the machine is not self-starting.

Given disadvantages can be substantially smoothed off while using Darrieus VAWT with WD forming high-speed air flow. Maybe it is best to use Extended Height/Diameter Ratio Darrious VAWT (EHD).

We also consider the Finnish turbines "Wind Side" to be very prospective. They have certain advantages over other types of turbine, namely: they can work at the wind velocity up to 60m/c; they are rather resistant against turbulence, noiseless, safety and possess other useful characteristics.