Conversion of Germany’s First Solar Seasonal Thermal Energy Storage into an Innovative Multifunctional Storage
Abstract
In 1996 the first large-scale seasonal solar thermal energy storage in Germany was built in Hamburg-Bramfeld. It was operated until 2009 in a central solar heating plant with seasonal storage storing solar thermal energy from the summer period to the heating season. The owner of the storage, the E.ON Hanse Wärme GmbH, now decided to connect the storage to the district heating net of Hamburg-East and to convert it into an innovative multifunctional storage. This means that besides solar heat in future also surplus heat from a waste-fuelled cogeneration plant will be charged into the storage. With this connection a favourable combination of solar seasonal heat storage and waste heat from cogeneration will be demonstrated for the first time. The partners in this project are Hamburg Gas Consult GmbH for the design of the overall system, WTM Engineers GmbH for the design of the storage reconstruction, the Technical University of Brunswick (IGS) for monitoring and Solites for scientific accompaniment and advice.