Wind turbines are one of the earliest devices to be used for power generation. Over the years, wind generators’ designs have steadily improved, especially in terms of how the blades that are responsible for turning the turbines’ rotors have been constructed. Today, it’s possible to generate much more power from much less wind than ever before, which is largely thanks to these improvements.
Mats made out of reeds were used as the blades for the earliest types of wind turbines. While they functioned reasonably well under the right conditions, they broke easily. They frequently needed replacing, especially when they were exposed to strong winds.
Reed blades ending up being replaced by lighter and more durable cloth sails. Thanks to this blade design, early windmills were able to harness wind power effectively for processing grain.
The next phase in the evolution of wind turbines came with the introduction of wood blades and horizontal axis blade configurations. The inispiration for the new style of turbine was the design of airplane blades, which had recently made major strides. Although much lighter, wooden blades were nevertheless able to generate much more power than earlier turbine blades.
This was the point at which wind turbines were first used as a means of producing electricity. The first wind turbines of this type were relatively small in size, but they would soon be enlarged and used for commercial purposes.
In order to meet divergent needs, the differences between horizontal axis turbine blade designs and vertical axis ones started to become even more distinct. In terms of horizontal axis blade design, most of the changes would manifest themselves as adjustments in blade shape and pitch, materials, and the number of blades used per rotor.
In most cases, 3-blade designs came to be used for horizontal axis wind turbines, as they provide the best balance of stability and rotor speed. Composite blades, which provide superior strength and flexibility in addition to lightweight construction, are used for many modern turbines. Wind turbines with composite blades can not only spin faster, but can also generate power from low-speed winds, which older models couldn’t do.
Furthermore, vertical axis wind turbines have undergone a number of developments which have opened them up to a wide variety of purposes. The rotation for these units is usually provided by aspects that take advantage of wind drag or wind lift.
The big advantage of vertical axis wind turbine designs is their ability to provide power regardless of wind direction. In this way, they offer a more consistent output of power than most horizontal axis turbines. What’s more, because vertical axis turbines rarely require a tower, they’re often favored by residential users.
To know about the pros and cons of solar energy, check out Advantages and Disadvantages of Wind Power.
For the best guide I have found for building your own wind turbines with step by step videos, go to Best DIY Solar and Wind Guides.
Here’s another guide to building your own wind turbine Homemade Wind Turbine.
Tags: Advantages and Disadvantages of Wind Power, Best DIY Solar and Wind Guides, homemade wind turbine, Wind Turbine Blade Design