Large heat storage systems are increasingly needed to cover the heat requirements of villages and towns with as little CO2 as possible. The most economical construction method is the so-called earth basin heat storage system, which consists of a water-filled earth basin.
Several of these heat storage tanks with a water volume of 35,000 to over 200,000 cubic metres are already in operation in Denmark. The storage cover is insulated, floats on the water basin and cannot be used. Operating experience in recent years has also shown a need for improvements to the current designs. In Germany, the demand for underground heat storage tanks is increasing, whereby the surface area of the storage cover should be usable. For this purpose, high-quality architectural solutions are required that offer good utilisation concepts and solve existing problems with a construction that is as cost-effective as possible.