The decentralized feed-in of solar heat into district heating networks is a promising option for the decarbonization of heating networks in urban areas. However, there are still many technical and organizational issues regarding this approach that have not been solved yet. Accordingly, many key players are reluctant to erect a solar heating plant with decentralized feed-in.
The Stadtwerke Düsseldorf AG is different. In the previous project SWD.SOL (runtime: 2015 to 2018), they demonstrated pioneering spirit and constructed an experimental plant on a real scale. This experimental plant can be used for practical testing of decentralized solar heat feed-in into the existing district heating system in Düsseldorf. By using the implemented experimental plant, the SWD.SOL2 project will carry out an evaluation of different hydraulic variants for the decentralized integration of solar heat into large urban district heating networks.