Disadvantages:

Their performance against winds near the Earth is difficult.

Their transportation costs to the installation site (roughly 20% of the total price of the turbine)

Their installation requires heavy machinery and equipment.

Need maintenance.

The opposition groups of these turbines consider their use to reduce the beauty of nature.

Vertical Axis or VAWT

Unlike the horizontal type, these turbines have perpendicular blades that are attached to the shaft vertically. Unlike horizontal turbines that are mounted on a base or turbine tower, the turbine equipment and components are close to the ground.

Types of vertical axis wind turbines:

1. Darius Wind turbines:

This model of perpendicular turbines was first invented by Georges Darrieus in 1931. Darius has come from high speed and low torque turbines that require a manual setup to rotate and reaches its maximum speed after a short period of time. Darius has 2 to 3 blades or blades that are perpendicular to the shaft. Of course, there are other types of Darius turbines that were later developed. H-type series and Helical series with 3 blades. Darius’s perpendicular wind turbines are also known as Lift-based turbines, which are more popular and more popular than the Drag-based Turbines.

2. Savonius Wind Turbine:

Unlike the Darius model, this model has a high torque but lower rotational speed and, due to its design nature, has a weaker performance than the Darius model. The model also needs to be manually started to rotate, but the very low speed produces less energy, so their economic justification and efficiency are lower than other turbines.