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Kurioser Wind-Mixer liefert mehr Strom als Windräder?

Nov 10, 2022

Kurioser Wind-Mixer liefert mehr Strom als Windräder?

Wind

turbines must be in other words, when a particularly large amount of

wind

power is available, it can be turned off. You would completely overload yourself! Vertical

wind

turbines for private users, the Ice

Wind

company, on the other hand, can even in bad storms, i.e.

wind

speeds of 60 m/s, supply electricity without any problem. (Source 8) Depending on the location, an increase in electricity production of more than 50% can be achieved! An ingenious and aesthetically pleasing system that made many people's dreams of grid independence and low electricity prices come true. Small size, high durability of 20 years and a perfect complement to photovoltaics, especially in the

wind

y but darker months of autumn and winter. (Source 8) But is it really worth the investment?
kurioser wind mixer liefert mehr strom als windr der
We did the math! Besides the fact that vertical

wind

turbines are usually much more aesthetic than horizontal systems and are therefore popular with the population they are more likely to be accepted, the approach also has advantages in terms of energy technology! Of course, there are also disadvantages, but we'll talk about that latermore! (Source 1) One advantage, for example, is that vertical shafts cope particularly well with turbulent

wind

conditions. (Source 1) But probably the biggest advantage is that the

wind

turbine does not have to be continually realigned in the

wind

tunnel. With conventional horizontal axes, the relay is taken by a technical mechanism called

wind

direction tracking. (Source 4) In vertical

wind

turbines, one differs between the Savonius approach and the Darreius approach.
kurioser wind mixer liefert mehr strom als windr der
At first glance, both systems appear quite similar, however they differ greatly in the way they use kinetic converts

wind

energy into electricity. (Source 1) The Savonius approach is the most intuitive approach to a vertical

wind

turbine. Scoops in the

wind

tunnel catch colloquially said the muffled

wind

. Ultimately, the tensile force is used here. Savonius rotors are drag rotors and can spin faster than the speed of the

wind

. (Source 1) In principle, this type of system is therefore applied as something inefficient. The efficiency is sometimes well below 20%! (Source 16) The Darreius rotor, on the other hand, works completely another way.
kurioser wind mixer liefert mehr strom als windr der
Here the buoyant force is used. Through a sophisticated rotor blade shape and right angle, the rotation speed can like the

wind

speed by a factor exceeds 5! (Source 10) That seems a little weird at first, but it works - it makes a lot of sense. Here's an example: a fan does the same thing as a

wind

turbine, only in reverse. We invest electricity to generate

wind

. At the same time, and everyone can easily observe this, the fan rotates many times faster than the

wind

from the fan moved. (Source 3) The speed depends on the angle of the rotor blade.
kurioser wind mixer liefert mehr strom als windr der
The flatter the angle, the higher the speed of rotation must fail. Related to

wind

power technology can with this principle, the technical disadvantage due to vertical rotation can be compensated. In other words: Darreius rotors can theoretically achieve the same efficiency as conventional horizontal

wind

turbines (source1). Still, it would be wrong to use the Darreius rotor as being able to be described as superior to the Savonius rotor. Both systems have strengths and weaknesses. So a Darreius rotor cannot start itself. For this, a motor or a small Savonius rotor is used as a supplement. In addition, a Darreius rotor is more prone to vibrations, which cause higher material fatigue, but also lower efficiency. (Source 1) The older models of the Ice

Wind

company therefore counted everything on the Savonius rotors.
kurioser wind mixer liefert mehr strom als windr der
This concept tends to have the advantage that it is easier to build, simpler, more reliable, and less expensive. (Source 8) The company's latest Icelandic turbine However, Ice

Wind

seems to combine both approaches in a certain way and combine the best of both worlds. And the result is impressive! The 60-80 kg heavy

wind

turbine convinces mainly due to a really low noise level of only 30DB. This corresponds to a quiet room with a maximum one ticking clock. (Source 8) With a height of 1.5-2.2m and a diameter of 1.1-1.3m, the system theoretically fits in all front yards and on all house roofs. (Source 8) However, home users will be at this pointTwo factors are of particular interest!
kurioser wind mixer liefert mehr strom als windr der
The current possible or expected performance, and the price per kilowatt hour. So let's take a look at the scientific data in more detail! (Music change) Unfortunately, Ice

Wind

only sent the datasheets for the RW 100 and RW 500. These are the two industrial systems. However, we can assume that the Freya commercial system specifications are of a similar order of magnitude. (Source 8, 13) So it should be possible to provide valid forecasts for all products. In Germany the RW100 system would deliver almost 50-170kWh at an average

wind

speed of 3-5m/s, the RW500 system at least 100-450kWh! (Source 6) Assuming a family of four in Germany, which has an electricity requirement of approximately 4,600 to 5,500 kWh per year, however, this is a very sobering result. (Source 9) Interestingly, this is due to a location disadvantage attributed to it.
Germany tends to be less

wind

y than, for example, Iceland, the birthplace of the

wind

turbine. The problem is really serious because the production of electricity increases disproportionately with the increase in

wind

speed. At twice the

wind

speed, 4 to 8 times the energy yield is expected. (Source 8, 13) But we do not want to rush to this point to draw conclusions. How much is a kilowatt hour of the plant? Maybe the system is worth it after all! (music change) Let's calculate that average annual electrical performance with the useful life of the system and the acquisition costs. You can count on a price of €6000 for one of the commercial

wind

turbines.
In the isolated version of the independent network, the amount increases to €6,500. (Source 15) Calculated with the average

wind

speed in Germany, the system will deliver around 200-500kWh of electricity per year. Considering a lifetime of 20 years, which the data sheet promises, the system will supply a total of 5000-10,000kWh output of electricity. So a kilowatt hour has a pridePrice of 60ct to €1.20 (source 6) A payback would be with the average German only after 40 years or realistically not given at all. The system makes financial sense for private users only of average

wind

speeds above 5 m/s, which, however, is mainly only in the north of Germany can reach.
The system is particularly cost effective for the Central US where we like to have

wind

speeds of 7m/s to 10m/s. These values ​​also occur in very

wind

y Iceland. In these regions we can generate electricityExpect from 800kWh to more than 2000kWh. (Source 13) Here electricity costs can go up to 40ct drop 15ct. This will pay for itself within the lifetime definitely possible! Especially in off-grid areas with little sun, which means there is little potential for PV, this could happen system to be a game changer. It is clear that the Ice

Wind

system has a right to exist and it will pay off for many people.
Some, however, have to look for an alternative to put. And therefore a warning at this point. Before going into such an inverted or related mini

wind

power system, you should definitely perform a cost-benefit analysis. Because in itself it can be almost anywhereGermany Small

wind

power technology pays off. It should only be according to the

wind

supply. Efficiency may be higher and the purchase price of a lower system. A

wind

speed measurement is essential for this, which can bring you back to earth very quickly. Because especially on the roofs of houses in inner cities, unfavorably even with a pitched roof, you can get decent laminar

wind

currents to search in vain for small

wind

turbines.
There's a reason

wind

turbine operators mostly rely on giant systems, and records for the world's largest

wind

turbine are broken almost every six months. At the top the

wind

blows much more constantly and stronger, which means that much more energy can be gained. In fact, you can take advantage of the vertical axis to play on a large scale. In Germany, more precisely in Lower Saxony, a promising vertical shaft was built, which is more environmentally friendly, covers less of the landscape and, above all, is significantly quieter. Due to the incredibly low noise level the system must be even at a distance of only 45 m from the nearest residential building to be erected.
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