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Windmills
Windmills are machines used to convert wind energy into other usable forms. They are commonly used for the pumping of water or milling of grains.
841 Questions
the wind turns the windmill blades, which turn an electrical generator (ac or dc) which makes electricity. normally power stations turn generators with steam made by boiling water with coal or gas or wood or oil etc. - these fuels are used up when burnt and cause pollution. normal fuel is expensive, difficult to get in bulk and are running out. Wind does not create pollution (although making windmills does) and does not run out
Windmills were invented to harness the power of wind for various applications such as grinding grain, pumping water, and generating electricity. They provided a renewable source of energy that helped improve productivity and efficiency in various industries.
What is the physics behind windmills?
Windmills work by converting the energy from the wind into mechanical power through the rotation of their blades. The force of the wind causes the blades to turn, transferring the kinetic energy into rotational energy in the turbine. This rotational energy is then converted into electrical energy by a generator, which can be used to power homes or businesses.
The average height of a wind turbine, including the blades, is around 290 feet (88 meters). However, newer models can reach heights of over 600 feet (183 meters) to take advantage of stronger winds at higher elevations.
What types of energy can windmills produce?
Windmills can produce electrical energy by converting the kinetic energy of the wind into mechanical energy, which is then transformed into electricity through a generator. They do not produce other forms of energy like heat or light directly, but the electricity generated can be used to power various devices and appliances.
Windmills can vary in size depending on their design and purpose. Commercial-scale wind turbines can have rotor diameters ranging from around 50 to 160 meters (164 to 525 feet) and tower heights of 70 to 120 meters (230 to 394 feet). Small-scale or residential wind turbines are typically smaller, with rotor diameters of 1 to 10 meters (3 to 33 feet).
Why do windmills always turn counter clockwise?
Windmills typically turn counter clockwise in the northern hemisphere due to the Coriolis force, which is a result of the Earth's rotation. This force causes the wind to deflect to the right, resulting in a counterclockwise rotation of the windmill blades.
Windmills have blades that are designed to catch the wind, causing them to spin. The rotation of the blades drives a generator inside the windmill, which then converts the kinetic energy of the wind into electrical energy.
Why are windmills called windmills?
Windmills are called so because they are machines that harness the power of wind to generate energy or perform work. The term "mill" refers to the machine's ability to grind grain or pump water, while "wind" signifies the source of energy used to operate the mill.
Where is the oldest windmill now?
The oldest windmill still standing is likely the Chesterton Windmill in Warwickshire, England, believed to have been built in the 1630s. It is a well-preserved example of a stone tower mill and is still operational, though it is now primarily a tourist attraction.
The blades are twisted so they rotate when the wind blows. This rotation can be used to turn millstones to grind corn into flour, or to pump water out of the ground, or to turn a turbine to produce electricity.
The sails of a mill are set at an angle to the wind. As the wind spills off the sails it imparts some of its kinetic energy to the shaft and starts it turning. A tail fan is used to automatically point the mill into the wind. The rotating shaft has a gear wheel which supplies energy to the hursting frame, where the two millstones, one fixed and one rotating, are kept a small distance apart. Grain is fed into a hole in the center of the rotating stone and progressively moves to the edge whereupon flour falls into sacks via a chute.
Wind produces kinetic energy which moves the rotor and, when the rotor moves the gears also move and turn the generator. When the generator turns, it will change the kinetic energy turn to electrical energy.
A:A windmill works on the principle of wind energy. when the wind blows its force make the blades of the windmill to move. they move in circular motion . thus, the energy of wind can be made to electricity or to grind grains into flour. it is a much better way as it is Eco friendly.Windmills have large blades or propellors which catch the wind. When the wind blows the blades turn. This turning motion can be used to grind corn, pump water or generate electricity.
Wind blows into the large fan, fan has a shaft through the centre that extends to the rear. Flange fitted to the rear of the shaft has a connection point like a stud or such. A long shaft is then attached to the connection (must be a flexible connection & shaft usually runs down vertically to well/bore), As the flange spins with the fan shaft, the attachment point prescribes a vertical circular motion, the shaft attached to the connection point will be raised up and down as the fan completes each circle. The shaft can then be attached to any other mechanical device that can use such energy.
Windmills help us by converting the energy from the wind into electricity. This renewable energy source is clean and does not produce greenhouse gas emissions like fossil fuels. Windmills also help reduce our reliance on nonrenewable energy sources and contribute to a more sustainable energy future.
What is a ball mill and how does it function?
Ball Mill is widely used in metal and nonmetal mines, building materials and other industrial sectors of various minerals and rock grinding operation.
Principle: The rotation is through the ball mill motor driven pinion gear shift operation,
the pinion installed on the cylinder rotation gear, and slow down, speed gear are
rotating cylinder operation to work, the material in the feed gradually into the hollow
shaft cover cylinder body, in the cylinder spins, centrifugal force and friction generated,
so that medium (steel balls) and the ore up to a certain height with the cylinder wall
when the weight of a parabola with its fall or drip down , grind the ore is mainly
broken by the impact when the media fall when the abrasive force and motion to
achieve, the cylinder with the movement of ore into the ore to rely on constant
pressure to achieve, the final discharge from the discharge cover of the hollow
shaft. Wet grinding, the ore taken away by water, dry mill, the ore is extracted to the
air outside the tube out.(Zoneding Machine)
Henan Zhongke Engineering Technology Co.,Ltd tell you something about Ball Mill:
The ball mill is a key equipment to grind the crushed materials, and the ball mill is widely used in powder-making production line including cement, silicate, new-type building material, refractory material, fertilizer, ore dressing of ferrous metal and non-ferrous metal, glass ceramics, etc, and the ball mill can grind various ores and other materials with dry type and wet type. There are two kinds of ball mill, grate type and overfall type due to different ways of discharging material.
To grind the material continuously that, to feed from one end and to collect the discharge in a cyclone from other end with the help of a fan. The classifier may be of mechanical type or for a very precise & fine separation variable speed motor driven classifier is also available.
Basic principle Ball mill is generally used to grind material 1/4 inch and finer, down to the particle size of 20 to 75 microns. To achieve a reasonable efficiency with ball mills, they must be operated in a closed system. There is a specific operating speed for most efficient grinding. At a certain point, controlled by the mill speed, the load nearest the wall of the cylinder breaks free and it is so quickly followed by other sections in the top curves as to form a cascading, sliding stream containing several layers of balls separated by material of varying thickness.
Henan Zhongke Enineering Technology Co.,Ltd
How do windmills know which way to face?
There may be a small propeller on the opposite side to the main sails or there may be a vane to turn the windmill. See the examples in the links below. There may be a small propeller on the opposite side to the main sails or there may be a vane to turn the windmill. See the examples in the links below.
How do windmills slow global warming?
By using windmills to produce energy, it cuts down on energy produced via fossil fuels such as coal and oil which produce greenhouse gases. Greenhouse gases are the main causes of global warming.
Basically, using windmills to make clean energy cuts down on the production of greenhouse gases.
How much does a windmill propeller weigh?
The weight of a windmill propeller can vary depending on its size and design. On average, a typical propeller for a small residential wind turbine can weigh anywhere from 30 to 150 pounds, while larger commercial wind turbine propellers can weigh several tons.
Windmills use blades to gather wind that flows over it. Just like an airplane uses wings for lift, windmills use their blades for lift as well - in this case to turn the windmill. Windmills are pretty simple structures; their blades are connected to a drive shaft that is connected to an electric generator. As the blades turn, this turns the drive shaft and creates electricity. Electricity is sent through wires and collected.
There are several different types of windmills, categorized by the direction in which their blades rotate. Two different types of windmills, most commonly called turbines when producing energy, are the horizontal axis turbines and the vertical axis turbines. Horizontal turbines are by far the most popular type of turbine and are the traditional type of windmill with blades that are similar to an airplane's propeller. These are the windmills we often see pictures of - the Holland variety. On the other hand, vertical axis windmills have blades that resemble an egg beater. They are far less popular than horizontal windmills only making up a very small overall percentage.
In addition, wind mills can be used to harness energy without producing electricity. An example is the type of windmill that takes the mechanical motion induced by the blades to turn millstones that grind corn and other grains, hence the term "windmill". Other examples of non-electrical windmills include those that pump water. (These have been around for a long time.)
How does wind make electricity?
Wind makes electricity by turning the blades of a wind turbine. The spinning blades are connected to a generator, which converts the kinetic energy of the wind into electrical energy through electromagnetism. The electricity produced is then transmitted through power lines for distribution.
Where you can get plans to build a working windmill like you see out West on the Internet?
You can find plans to build a working windmill on various websites that offer DIY projects, woodworking plans, or renewable energy resources. Websites like Instructables, Mother Earth News, and Home Depot provide guides and instructions for building a functional windmill. Additionally, you can search for specific windmill designs, such as the classic Dutch-style windmill or modern turbine models, to find detailed plans online.
Windmills do not "fly" in the traditional sense. Windmills harness the power of wind to generate electricity or pump water by using the kinetic energy generated by the movement of the wind to turn blades attached to a rotor. This rotational motion is then converted into mechanical energy through a generator.
What energy transformations occur in a hairdryer?
Motor action occurs when electromagnetic energy (electricity) is converted into mechanical energy (rotation) by the fan motor. The fan then turns and air moves through the device. Electromagnetic energy (that same electricity) is also converted into thermal energy in the heating element, and from there the heat is transferred into the air as it passes by.
What would be a girly science fair project?
ANY science fair project done by a girl is "girly." Don't be limited by gender roles. If you're like, "Science is haaard!", i would say a girly science fair project would be something like this example:how long does it take flowers to grow Another thought: collect several scents over a wide range of prices-- for women and or men. Figure out a way to test how long-lasting the scents are. Put a very carefully measured amount of each on something odorless, and get a few people to help with a subjective scale of how much scent is left. Test them after fixed lengths of time... You get the point. Match up the results with any info you can find on the contents of the scent. What is the basic 'medium' or 'vehicle' substance that forms the base of the liquid? I understand that some scents have bases that give up the scent notoriously fast. This would actually be interesting, and might yield some surprising results.
Where is the best geographical location for an oncologist?
== == That would probably depend upon what you mean with "best". If best means, that you want to help as many people as possible and would thus like to chose the region with the most cancer patients Chernobyl might be the geographical location of your choice. If you just want to make as much money as possible you would probably chose to settle down in the US, as patients are charged more for their treatment then anywhere else. If you like the easy life you might think about going to an Arab country and have the royal family pay you a considerable income for not doing much.... If you like bureaucracy and have masochistic tendencies, Germany might be your pick, since you will send more time filling out forms for the public insurances than anything else.
How much energy does a wind mill produce?
Most turbines being set up 2012 in Europe are rated in the 1.5 MW to 3 MW range, 4 MW and 6 MW units have been set up but still are very few; 7 and 10 MW units are on the drawing boards of most large manufacturers.
As a rule of thumb some projectors calculate that a turbine will produce the rated power for 30% of the years 8760 hours. A 3 MW unit will then produce close to 7.9 GWh per year
Wind turbine manufacturers vary a little, but those such as General Electric (GE) produce a 1.5-megawatt model that is the industry average. This mean that if the wind blows within the ideal range, between 27 and 56 mph, a 1.5 MW wind turbine will produce power at the rate of 1.5 MW, its rated capacity. GE and others companies are producing turbines in the 2.5 to 3 MW range now, and research continues to develop even greater producing turbines.
All wind turbines have a range of wind speeds, usually this is from 30 to 55 mph. It is in this range that turbines will produce at rated, or maximum capacities. When the wind speed is slower, power output drops. For instance, if the wind speed falls to half of the rated capacity production decreases at a factor of eight. Turbine industry manufacturers estimate that annual output for most turbines is actually around 35% annually. Real world estimates put that power output at about 22.5% annually.
Here's another way to look at it:
The power output of a 1.5 MW turbine that produces for one year at 25% will produce 3,285 MWh (Mega Watt hours), equal to 3.285 million kWh (Kilowatt hours) during that year.
Total worldwide wind generated power output for 2008 was 121 GW (Gigawatts) -- 1 GW = 1,000 Megawatts = 1,000,000 Kilowatts = 1,000,000,000,000 watts.
For a better comparison, 1 kW equals about 1.34 horsepower. The average American home uses about 8,900 kilowatt-hours, or about 1kW continuously during the whole year.
How do you power a light bulb off of wind mill?
A wind turbine is used to convert the kinetic energy from the wind into mechanical power, which can then be used to generate electricity. The electricity generated can be stored in batteries and then used to power a light bulb.
