Liquid aluminum may be used for temporary storage of energy




Melted and thus liquid aluminum in the giant smelting furnaces may be used to store wind energy temporarily. A large German aluminum smelter is researching the concept.

According to the German aluminum producer Trimet Aluminium SE, the company can keep an amount of molten aluminum over a period of two days, which equals 3360MWh, accounting for the energy needs of approximately 300,000 households for a day. Furthermore, would the estimated efficiency of the process are 90 percent, while the company says it needs to implement any major changes in its production process.

Aluminium is produced by heating alumina powders in ovens to approximately a thousand degrees Celsius. Using electrodes will send the smelters direct current through the liquid. As a result, the liquid aluminum drops to the bottom of the oven.

The production process takes a lot of energy: Trimet need for each tonne of aluminum 14MWh of power. Thus, the company places a huge burden on the power grid, but Trimet currently viewing the ability to turn into liquid aluminum in furnaces like giant batteries.

The temporary energy storage is possible by varying the speed at which the aluminum smelting companies, thinks Trimet. The 290MW that the smelter is normally used can be varied up and down by 25 percent. At times when there is much supply of energy to the power supply and the price is so low, such as wind turbines produce electricity on a large scale, the company additional aluminum melt. At peak times, the company can provide power right back, writes Bloomberg.

In Germany, due to the Energiewende lot of money and time into research for the temporary storage of green power. According to scientists with the principle of energy storage that can Trimet browsing also be used for other energy-intensive production processes, such as that of cement, paper and various chemicals.


In: A Technology & Gadgets Asked By: [20403 Red Star Level]

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