With the growing climate crisis and the continuous environmental damage, people are today more than ever on the lookout for renewable energy resources. Rising sea levels and the suffocating level of pollution in various countries around the globe has given rise to humankind’s interest in and development of wind turbines.
What is a Wind Turbine?
A wind turbine secures air into a hub and later converts it into a generator. The air that passes through the turbine blades is spun into the generator via rotational momentum. Over time wind turbines have developed into one of the most efficient methods of renewable energy generation.
Types of Wind Turbines
Wind turbines are mainly of two types:
- Vertical Axis (VAWT)
- Horizontal Axis (HAWT).
HAWT is the most common type of wind turbine built worldwide. VAWT is a type of wind turbine that has two or three blades and in which the main rotor shaft runs vertically.
However Vertical Axis Turbines are the most popular amongst household owners as a reliable source of renewable energy. Check which wind turbine is better.
Types of VAWT
Vertical Axis Turbines are economical, practical, quiet, and efficient in structure. There are mainly two types of vertical wind turbines:
- Darrieus Model
- Savonius Rotor
- Quiet revolution QR5
1. Darrieus Wind Turbine
The Darrieus model was invented by Georges Darrieus in 1931. It is more suited for generating alternating current electricity. The Darrieus model requires a manual push therefore needing an external power source to start operating, making it less reliable. This is comparatively smaller in size than the savonius rotor and looks like an egg beater.
2. Savonius Wind Turbine
These are used in high-reliability low-efficiency power turbines. It consists of fewer parts than the Darrieus model, resulting in a more budget-friendly maintenance. They are cheaper to produce than the horizontal axis turbines. Its appearance is that of a 55 gallon drum cut in half and then placed upon a rotating shaft.
Savonius rotor models are the more commonly found wind turbines in today’s date.
3. Quiet revolution QR5
There is another type of vertical axis wind turbine, not very famous, which is the Quiet revolution QR5. It is a variation on the Darrieus wind turbine. It quietly generates enough energy to power a home or small work space at lower wind speeds. However, it requires a three-phase electrical connection which is not always available at small commercial or residential spaces. Currently, this model is only operational in the United Kingdom.
The rotor is approximately 5 m (16.4 ft) tall and 3.1 m (10.17 ft) in diameter, and weighs approximately 450 kg (990 lb). The blades are on a 3.4-m (11.15-ft) shaft where height restrictions are a concern.
Vertical Axis Wind Turbines being a cheaper and more efficient means of renewable energy are currently the only reliable option for households and small commercial spaces. Due to their quiet structure they are popular amongst the average man.