Invisible Gigantic Pumped Storage Power Plants (PSPPs) in Lignite Open-Cast Mines - A Key Technology for Short-Term Storage to Implement the Energy Transition

The sun provides Earth, and thus mankind, with a virtually unlimited amount of environmentally friendly, renewable energy in the form of light. Therefore, an energy crisis does not exist on Earth. Most of this Solar energy is stored as heat in the atmosphere and the oceans. However, to utilize this energy source in the atmosphere, we humans must learn to convert this energy into electricity using modern technologies, primarily wind turbines WK and photovoltaics PV, and then store it.

Many different methods of storing electrical energy (green hydrogen, batteries such as lithium-ion batteries, hydro power plants etc.) are currently being discussed and tested. Energy storage by hydro power plants has been proven for a long time. It can not only store enormous amounts of energy, but it is also very economical and has an approximately 80% recovery efficiency for electricity. A proposal to erect huge hydro power plants is the idea of invisible pumped-storage hydroelectric power plants in open-cast lignite mines or in the deep sea.