Heating, Cooling and HVAC

Introduction:
Wind energy is one kind of green energies which is never exhaust
ed to use. Wind energy is available free of cost.

A windmill is an engine powered by the energy of wind. It often refers to an engine contained in a large building as in traditional post mills, smock mills and tower mills. It also refers to small tower mounted wind engines used to pump water on farms and modern wind turbines for generating electricity.

Since ancient times, man has harnessed the power of the wind to provide motive power for transportation. Likewise, the technique of grinding grain between stones to produce flour is similarly ancient, and widespread. Quite where and when these two came together in the first windmill is unknown, but a likely scenario suggests a Persian origin, from where (tradition has it) the knowledge spread back into Northern Europe as a result of the Crusades. However, since the Persian mills were quite unlike the early European designs it seems just as likely that the adaptation of wind as a power source was independently discovered in Europe, albeit at a later date. (Of course wind was not the first non-human power source applied to the task of grinding corn - it was preceeded by both animal power, and in all probability by water power).
European millwrights became highly skilled craftsmen, developing the technology tremendously, and as Europeans set off colonizing the rest of the globe, windmills spread throughout the world.

The pinnacles of windmill design include those built by the British, who developed many advanced “automatic control” mechanisms over the centuries, and the Dutch (who used windmills extensively to pump water and for industrial uses, as well as to grind grain).

As steam power developed, the uncertain power of the wind became less and less economic, and we are left today with a tiny fraction of the elegant structures that once extracted power from the wind. These remaining windmills, scattered throughout the world, are a historic, and certainly very photogenic, reminder of a past technological age. A number of mills have been restored, either visually, or in some cases back to full working order, where the trend for organic and non-manufactured foodstuffs has shifted the economics slightly back in their favour once again.

However the promise of widespread power from the wind lives on, both in the form of wind turbines producing electricity, and in the form of small scale windpumps (often largely low-tech “appropriate technology” installations) still used extensively in world.
agriculture.

Wind power can save money
Small wind electric systems are not only have no pollution, they are among the most financially efficient renewable energy systems available for home use. Used in a variety of ways, small wind electric systems may be used on farms for water pumping among other applications.

Small wind electric systems may provide the following for home users:
* 50 - 90% reduction in electricity bills
* In the event of power outages, small wind electric systems can supply power
* For those in remote or extreme rural areas, small wind electric systems may eliminate the need for extending power lines.
For a home wind energy system, there are a few pieces that make up the wind energy system. The system generally consists of a wind turbine, the tower (the small wind turbine is usually mounted on a tower) to position the system higher to take advantage of increased wind speed, thus increasing system output. Lastly, balance of system components, which really depend on your application for the wind energy system, but generally might include inverters, controllers, and/or batteries.
You may buy a small wind electricity system from most manufacturers with complete parts for your exact use.

To make the sails face the wind the entire post mill had to be turned. This was a cumbersome and time consuming task. Eventually a better way was found to achieve to same end. Masonry towers were constructed and the sails were placed in a cap which could be turned 360 degrees. We do not know who invented the cap but it seems to have been in use by the fourteenth century. Many small drawings appear in manuscripts of that time and examples can be found in stained glass. These drawings show how mills appeared to mediaeval artists. They may not have known how a mill worked but some drawings do provide technical evidence.

Wind power was also used to raise water. The earliest water-raising mills operated scoop wheels. A Scoop-wheel had a lift which was less than its radius. Many mills of this kind were used by the Dutch engineers Nicholas Vermuyden when he drained the Fens in the C17. There were hundreds of drainage mills in various parts of England but most were in Suffolk or Norfolk. Wooden scoop wheels were placed in narrow brick channels and as the wheel turned it pushed water uphill and across the threshold. This then ran off into a higher channel. On a steep slope several wind pumps were used close together.

Owner of Farm House, having a pond where he raises fish should install Windmill by the side of the pond for several benefits. First of all this will provide more oxygen to the pond water and keep the water fresh, the fishes will be healthy and grow fast and maintain the the biodiversity of that area.Secondly, he can run a generator to supply power to his firm house or at least he can run a water pump which will sprinkle water to his lawn and flowering plants.

The use of wind energy has been re-valued in recent years. Wind power can be used to generate electricity. Even traditional mills can be constructed to provide power. This Cretan form of mill is one of many to be seen at the Centre for Alternative Technology, Machynlleth. It is simple to build and does not require elaborate tools.