Adding a cement tank to a wind turbine can match the 100 MWh of Musk

Germans have always maintained a leading position on the importance and achievements of clean energy. One of the reasons is that they occasionally open their brains and try to increase the efficiency and utilization of clean energy. This is not the case. The “Global Highest Wind Turbine Generator” project being built by Germany's MaxBoglWind is another example of a German mind. The project will be equipped with a barrel of "water battery" for each wind turbine, combining wind power generation with pumped storage, and will also improve the stability and sustainability of clean energy.

Moreover, this "water battery" power can even rival the 100 megawatt-hour super battery that Tesla CEO Musk promised to the Australian government!


The cement pier under the wind turbine tower is a "water battery"

When the project went live in 2018, the four wind turbines will become the world's highest land-based wind turbine with a cabin altitude of 178 meters and a total height of 246.5 meters. The further away from the ground, the more stable the airflow, which means higher efficiency. For every additional meter of cabin height, the annual power generation can be increased by 0.5% to 1%. therefore. The height alone is enough to show the German's ability.

But this is not the point. The focus is on the storage tank below each wind turbine tower. The water storage tank made of cement not only put on a “patch shoes” of up to 40 meters for wind turbines, increasing their power generation from a height, but also becoming their unique “water battery”.

This storage tank is the "energy storage" part of pumped storage. MaxBoglWind's wind turbine site selection is very special, just 200 meters below the top of the hill there is a hydroelectric power station with its own reservoir. When the grid power is sufficient, the electricity generated by the wind turbine, even from the grid, can be used to pump water from the reservoir into the tank. When the power demand is too large or the wind power is insufficient, the water storage tank can be opened to release water and use the kinetic energy brought by the 200-meter drop. The entire system can be converted from energy storage to power generation within 30 seconds, and the total design of the four tanks is 70 MWh. Although this storage capacity is only 70% of the Musk Super battery, it is only 4 wind turbines. If there are 10, 20, 50?

It is important for Germany to be able to store excess wind energy. It is important to know that windy Germany often suffers from negative electricity charges due to excess wind power. On the weekend of October 29, due to the windy weather, Germany's total wind power generation reached 39,409 MW, equivalent to 40 nuclear reactors. In order to balance the relationship between supply and demand, the German power grid will consume excess power so as not to damage the power grid. A negative electricity fee means that the power plant must pay the user. Or stop generating electricity temporarily.


German electricity chart: When the vertical axis is Euro/MWh, the red line is 0, when the white line is lower than the red line, the electricity fee is negative

At present, the three main technologies for clean energy in the world are solar power generation, wind power generation, and hydroelectric power generation. All three have their own advantages and disadvantages. By combining wind power and hydroelectric power, the Germans not only compensated for the weakness of the sustainability of wind power generation, but also compensated for the weakness of hydropower generation. Let us look forward to the next brain hole of the Germans. (Author: Chen Xiangyu)

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