Many private households will need to switch their heating systems to renewable sources in the coming years. In Germany alone, this affects 20 million gas and oil heating systems. However, there are currently very few technologies capable of providing climate-neutral heating in winter. At the DLR, a novel thermochemical energy storage system based on lime has been developed for this purpose. The planned DLR spin-off CALOGY aims to offer a storage system for the building sector, thereby paving the way for a renewable heat supply. The technology is capable of storing large amounts of energy efficiently and cost-effectively over long periods. The storage system can be charged whenever renewable electricity is available at a low cost. The stored energy is retained without thermal losses for weeks or even months and is used to provide heating when discharged.
