Surfaces that are not Ideal
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Turbine blade convoy passing through Edenfield in the UK The components of a wind turbine need to be transported from the factories to the wind farm where they will be installed. The difficulty is that current wind blades are very large, being able to be 100 meters long, or even more. Wind farms are usually…
Wind Turbines at Palouse, WA, United States Yes, Wind turbines can work and operate in cold and ice regions. Certified wind turbines can operate down to -40 Celsius without interruption. For some windfarm regions in the world, the windiest time of the year is during the winter. Turbines operating in regions with years-round snow have…
In fact, fires in wind turbines are much less common than fires in other energy sources, suchas the oil and natural gas sector, where there are thousands of fires a year. The main causes of fire in wind turbines are: The biggest risk in wind turbine fires is with wind blades, which are made of…
Painting blades black can reduce bird mortality by up to 72%, according to a 10-year study conducted at a 68 MW wind farm in the Norwegian archipelago of Smola. The idea is to paint one of the three blades black to make the system more visible and create more contrast so that birds can easily…
Video Have you noticed that in some countries wind turbines are painted with redstripes? mainly closed to the outer section of the wind turbine blades. What’s the reason? The red paint on the wind turbine blades signifies the proximity of an airport or airstrip. The number of stripes painted on the wind turbine blades is…
For local residents, calculations concerning the noise impact of wind turbines concern the noise exposure on the outer wall of the house. In addition, a distance measure can (also) be used. This is the minimum distance that must be maintained from the foot of the wind turbine to the outer wall of a house. However,…
As far as I have seen, the blades of all Danish wind turbines run in the same direction, i.e. clockwise. Is there a technical reason for that? The short answer is: No, it is not the wind’s fault, and no, there is no technical reason for all blades to rotate the same way. It looks…
Wind turbines at sea have to endure a lot. Raindrops combined with a high rotational speed can cause erosion of the turbine blades. Pieces consisting of fiberglass in an epoxy matrix, and paint can then break off. This is the same material as a polyester sailboat or surfboard. The material is non-toxic, but of course,…
Why on earth do all wind turbines have exactly three blades? ship propellers can manage with two – and one would immediately think that 4 or 5 blades would catch even more wind and therefore provide even more power. The 3-blade horizontal axis wind turbine is the most advantageous option, in several technical and operational…
There are a number of reasons why turbines actually stop temporarily. As the name of the technology implies, wind turbines are naturally dependent on wind. Measurements of local wind conditions on site guarantee that they are built in areas with sufficient wind. There are often other reasons for turbines to be temporarily shut down. One…
Wind turbines are highly advanced technologies. Nevertheless, the dismantling and recycling of their components is not a problem, as waste management companies have confirmed. In the meantime, companies have found safe solutions for recycling wind turbines and reusing themprofitably. Modern wind turbines can be almost completely recycled: 80 to 90 percent of the components of…
Wind turbines produce clean electricity, but energy also has to be produced for their production, operation, and disposal. So at what point are these quantities of energy recovered? To find the answer, we need to look at “energy amortisation”. Modern turbines can pay for themselves in terms of energy in a few months at most….
The Earth’s climate is constantly changing due to natural meteorological factors. But the speed at which this has happened in recent years has increased unnaturally. The drought in many regions of Europe in the summer of 2022 is just another example. Humanity has contributed to accelerated global warming through the depletion of the Earth’s resources,…
Videos Atmospheric variables and Forces Part 1 Atmospheric variables and Forces Part 2 Atmospheric variables and Forces Part 3 Atmospheric variables and Forces Part 4 Slides Variables that are used to describe the atmosphere are as Pressure Pressure can be thought of in two way the 2nd definition also explains why pressure always decreases with…
Video Slides The atmosphere is the layer of thin gases that surrounds the earth’s surface held by gravity forces. Depending upon the height of the earth’s surface, atmosphere layers are classified into different regions The temperature and pressure of the atmosphere vary with respect to the height as we go up from the earth’s surface….
How much energy content is in the wind and how much power a wind turbine can generate from a given wind speed can be explained by the following formula So, the power generated by a wind turbine depends upon air density, rotor disc area, and wind speed. Usually, we consider air density as constant thus…
No wind turbine can capture more than 59.3% of the kinetic energy of incoming wind in an open channel. This is called the Betz limit named after the german scientist Alfred Betz who derived this limit in 1919. Betz Limit Explanation Let’s understand why the wind turbine cant extracts 100% kinetic energy from the wind….
Wind energy is a source of renewable energy. It is clean and environmentally friendly and does not pollute our environment. Wind energy is obtained from the wind. The kinetic energy of the wind is harvested through wind turbine blades to generate electricity. The wind has driven people for centuries. In the past, it helped us…
Video: How Winds are formed? Wind results from the movement of air due to atmospheric pressure gradients. Wind flows from regions of higher pressure to regions of lower pressure. The larger the atmospheric pressure gradient, the higher the wind speed. The Sun is the key source of winds on the earth’s planet. Winds are mainly…
The blades of a wind turbine are affected by four forces: drag, lift, centrifugal, and gravitational forces. Drag Force on Wind Turbine Drag forces are caused by the air molecules that hit the surface of the blade facing the wind. A major component of the drag force acts in the direction that is parallel to…
Wind turbines work on a simple principle. The wind hits the rotor blades. The combination of wind speed and blade rotation results in a pressure distribution on the rotor blades. The pressure distribution causes a turning moment (torque). The turning moment rotates the shaft. The shaft is coupled to a generator that produces electrical power…