Wind Mill

Question: Write an essay on Wind Mill? Answer: Introduction Wind mill- it is a mechanical mill that is used to convert the rotational energy of the blade into electricity with the help of sail. Sail are also blade but its name is given because their structure is just like sail which can take the maximum amount of wind so that maximum amount of utilisation energy takes place and electricity is generated on a large scale. Application of wind mill In the pre historical times and in the 19th centuries they are generally used to mill grain, water pumping or sometimes they are used for the purposes. When they are used in combination than they are quite utilise more than if they are used for single purposes. Thats why they are generally gristmills or wind pumps or they are both. in the modern age the modern mills application is quite different and they are used for generations of electricity with the help of steam turbine .now a days they are also used for the pumping the water through wind pumps .wind pump is also used for land drainage or to extract the ground water. Different types of wind mill Horizontal wind mill vertical wind mill post mill hollow post mill tower mill mill Post mill- it is one of the earliest wind mill. The structure of wind mill is that the complete body of the mill is mounted in a single straight vertical post. One of the most earliest wind mill is in OUTWOOD in Surrey which was known to be built in the year 1665. It is located in England. Some of the non- operational post mill is found in Great Gransden in Cambridgeshire that was built in the year 1613. There are different types of post mills Sunk Horizontal wind mill- it is special type of wind mill whose blades are rotated in the horizontal plane around the perpendicular vertical axis. The main components of horizontal axis wind mill (HAWT) are rotor shaft, electrical generator, turbines, and gearbox. The rotor and electrical generator are generally fitted on the top of the tower .when small turbine wind mill are used they are simply pointed by wind vane where as large turbine use wind sensor with servo meter. Different component of blading in the wind turbine are- the lifting style blading in the turbine blade-this blading style is carrying large amount of strong energy wind.This type of blading has maximum efficiency. The drag style blading in turbine blade-they are not capture maximum amount of strong wind but they are popularly used for water mills. the structure of wind mill is quite differentas they have flattened plates for catching the wind Vertical wind mill- it is such a wind mill in which blade are rotated in the in the vertical direction. From the historical period it has been found that vertical mills are discovered after the discovery of horizontal mill. Post mill- this type of wind mill are generally small and they cannot work under heavy wind as they are less stable and easily break. Open trestle post mill-it is such type of wind mill which are generally bigger and they canwork under heavy wind. Post mil with round house-it is such a wind mill in which has dual function of creating a covered storage area and also protecting the trestle present hollow post mill- it is such type of wind mill in which the post is hollowon which the body is mounted to keep the drive shaft inside it.in this hollow- post mills the wheel that is used are just like driving scope. ex- hollow post wind is in neither land Tower mills-it is such type of wind mill that is discovered in the early 14th century whose construction is quite simple .it is just like tower above which a cap is present who can rotate about its axis rather then the complete motion of the mill.it is such type of mill whose construction is quite complex . it is quite different from the post mills, the cap of the tower mills is necessary to turned whenever there is chances of motion of wind in other direction. there fore there is requirement of making the tower mills quite taller so that maximum air can come in contact with the wind for making the efficienciesquite higher then the other types of mills that was discovered at that time . there is also requirement to make the blade also so that maximum energy is utilised .there is also requirement of making the blade so automated that they can co relate with the wind an move together with him to get the maximum utilisation this wind mills is generally found in the nearby area of the co ast of Mediterranean sea this wind mill are also found in the big countries like Germany, France. Smock mills-it is the recent development of the tower mill which is quite different from the other mills.it principle is generally based on the wooden frame work called smock. smock is generally made of wooden framework and also the smocked is also thatched, or covered by some special material like sate tar paper etc. they are generally lighter than othertypes of mills . Working of wind mills Generally there are three blades found in the wind mills.it has to be noted that they are generally rotated clockwise. Wind mills are generally control by the computer .when the wind is allow to face the blade. The work of the computer to controlled the direction of blade according to the blade. There is hub present whose work is to control the facing of the blade towards the wind with the help of computer. The blade of the windmills is aerodynamically working to provide the rotational energy. These blades are connected through the generator or gear box which converts the mechanical energy directly into the electrical energy which is then transfer to the different power station without much loss of energy and finally they are sent different household places where they are further utilised in variety of forms. Conclusion The windmill is described completely along with its definition, types and mechanism. References Ecotricity n.d(viewed on 14th june 2015)(https://www.ecotricity.co.uk/our-green-energy/our-green-electricity/from-the-wind/how-windmills-work) (Norfolk Mills) Thornham composite mill(viewed on 14th june) Mill definition". Thefreedictionary.com. Retrieved 2013-08-15.(viewed on 14th june)