In Germany, successfully completed tests of an underwater energy storage systems

Saving energy obtained for future use - a very promising sector power development. One of the simplest methods is the storage of energy by means of pumping in a reservoir disposed above the power generator turbine, ordinary water. The liquid is pumped during the low energy peaks and is pumped with increasing demand for electricity. But recently, experts from the Institute for Wind Energy and Energy Systems Fraunhofer modified this technology and have successfully completed a series of tests.

In Germany, successfully completed tests of an underwater energy storage systems

The development of German scientists reservoirs, is a sphere with a diameter of 30 meters, it is not on the surface of the water and sink to the bottom of the reservoir together with the turbine generator. Excess energy in the system used for pumping water out of the sphere, but in the moment of filling the scope of the accumulation of energy obtained by the rotation of the turbine power generator. Such a sphere when immersed to a depth of 700 meters with a 5 MW turbine can accumulate energy up to 20 MW / h. The process of complete filling of the tank takes about 4 hours.

In Germany, successfully completed tests of an underwater energy storage systems

Schematic representation of the principle of energy storage

In Germany, successfully completed tests of an underwater energy storage systems

The test sample sphere

The new technology will be able to perfectly complement the existing wind farm, located in the open sea. During a series of tests, scientists have made a miniature version of the container with a diameter of 3 meters with the turbine on board and put it to a depth of 100 meters in the waters of Lake Constance, which has another name - Lake Constance. During the experiment, the technology has proven its worth, and the resulting data will be used later in the development of full-scale project of underwater power. Although development and is only at a very early stage, it has already attracted the attention of investors from the energy sector, and the Ministry of Economics and Technology of Germany, even financially support the launch of investigations.