Compressed air energy storage / CAES
Compressed air energy storage facilities (CAES) are particularly suitable for short-term energy storage. In CAES plants, surplus electrical energy is used to compress air, storing it under high pressure in caverns. The compressed air can then be used later to generate power. Diabatic compressed air energy storage power plants compress air prior to storage. The power is reconverted at peak load times using additional combustion of fuels. This improves the efficiency of conventional gas turbines and reduces CO2 generation. If the heat generated during compression is temporarily stored and used on extraction to increase the air temperature prior to expansion, no additional combustion is necessary (adiabatic compressed air energy storage, A-CAES). An adiabatic compressed air storage facility is a purely electricity-to-electricity store, with a performance profile and investment costs similar to those of conventional pump storage.
In 1978, the world’s first compressed air storage plant was commissioned in Huntorf near Oldenburg. KBB was involved in its planning and construction. In the early 90’s, KBB acted as a consultant for the construction of a compressed air storage system in McIntosh, USA.