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Wind Based Water Pump

Published in: Science
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Water Pump Using Renewable Energy Like Wind!

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    WIND BASED WATER PUMP Abstract: The main aim of the project is to draw water using wind. The main parts in this project are Rotating blades, wheel setup, Cylinder and piston arrangement, one way Valves, Suction pipe, Delivery pipes and Wind direction pointer, Foot valve. The vanes in the turbine are rotated with constant speed. A connecting rod is connected with the fly wheel. The connecting rod will move up and down when the fly wheel is rotated.
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    A cylinder and a piston arrangement is connected with the connecting rod. When the rod is moving up and down, the piston inside the cylinder moves up and down and thereby operates a one way valve. The one way valve is closed when the piston moves up and opened when the piston moves down. A foot valve is connected at the end of suction pipe. Inside the foot valve, there is a one way valve. The one way valve is closed when the piston moves up and opened when the piston moves down. Thus there is an alternate flow of water in the delivery pipe. Since this uses no electric power and fuel, this is a very cheap and best option. INTRODUCTION : The major advances in the design of the windpump, however, took place in the USA. The Technology was taken up and developed by the early pioneers or settlers who needed a method of lifting ground water for irrigation, for watering of livestock and later for providing water for steam locomotives which began to spread across the country. There were several significant
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    technical developments to the commercial machines during this time; the ability of the machine to turn into the prevailing wind automatically; the development of a self-governing mechanism which automatically turned the machine out of the wind when the wind velocity became high enough to cause damage; various improvements in rotor design and general durability and the introduction of gearing mechanisms. Windpumping for rural areas of the developing world : There are manufacturers in several developing countries now producing windpumps. The uptake of wind machines for water pumping, however, has been generally very slow even though the technology is well suited to the demand of many regions of Africa, Asia and Latin America. Where they are used, the demand is for one of the following end uses: • Village water supplies • Irrigation • Livestock water supplies Irrigation methods : There are several types of irrigation methods, where the most common is some kind of surface irrigation, sprinkle irrigation or drip irrigation. Surface irrigation is when the field is covered with water, either for a short period or during a longer. The water moves over the surface of the field by gravity flow.
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    Technical : The power in the wind : The power in the wind is proportional to: • the area of windmill being swept by the wind • the cube of the wind speed • the air density - which varies with altitude The formula used for calculating the power in the wind is shown below: PW = 1/2 p A V3 Where ,Pw is power in watts available in the wind (W) p is the air density in kilograms per cubic metre. A is the swept rotor area in square metres. V is the wind speed in metres per second (m/s). The fact that the power is proportional to the cube of the wind speed is very significant. This can be demonstrated by pointing out that if the wind speed doubles then the power in the wind increases by a factor of eight! It is therefore worthwhile finding a site which has a relatively high mean wind speed. Power that is produced by the wind machine can be given by : P = 1/2.CppAV3 where, Cp is the coefficient of performance of the wind machine. A rough estimate of the output from a windpump can be obtained using : PA = 0.1 AV3 where, PA is the average power output in watts over the year.
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    V is the mean annual windspeed in m/s Matching rotor and pump . When installing a windpump it is important to match the characteristics of the pump and the wind machine. A good interaction between pump and rotor is essential. The most common type of pump used for water pumping (especially for borehole water pumping) in conjunction with a windmill is the reciprocating or piston pump. The piston pump tends to have a high torque requirement on starting because, when starting, the rotor has to provide enough torque to overcome the weight of the pump rods and water in the rising main - once the rotor is turning, the torque requirement decreases because of the momentum of the revolving rotor. The windspeed can then drop to about 2/3 of the start-up windspeed before the windpump will stop. Windpumping with electricity : Although the multiblade windpump is by far the most common windpump in use, it is not the only option available. There is a requirement for the pump to be sited remote from the wind machine, is to use an aerogenerator to provide electricity for an electric pump. Although they tend to be more expensive, they do have the advantage that the electricity can be used for other applications
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    when not pumping and also that the electricity can be stored in batteries for use when the windspeed is insufficient for direct electricity supply.


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