Sorption Technology



Responsible: Jens Lang

Cooperation: W. Mittelbach, UFE SOLAR GmbH and Fraunhofer Institute for Solar Energy Systems (ISE),
F. Seewald, A. Pollei, M. Kraume, Technical University of Berlin

Literature: F. Seewald, A. Pollei, M. Kraume, W. Mittelbach, J. Lang, Numerical Calculation of the Heat Transfer in an Adsorption Energy Storage with KARDOS, Report SC-99-04 (1999), Konrad-Zuse-Zentrum.


The common application for active thermal solar systems is the supply of buildings with hot water. The main obstacle for heating purposes is the gap between summer, when the major amount of energy can be collected, and winter, when the heating energy is required. This demands the application of a seasonal energy storage with small heat loss over a long time and well defined load and unload behavior. For that purpose a new technique has been developed, which is based on the heat of adsorption resp. desorption of stream on silicagel (Mittelbach et. al, 1997). The load of water on the gel is a function of H2O partial pressure and temperature.
For understanding and predicting the operation behavior of the adsorption storage the temperature field and vapor density field in the bed have to be calculated. First computations with KARDOS can be found in the report cited above.
For further informations about the sorption technology see

New Concepts for Building Heating with Sorption Technology
(Fraunhofer Institute Solare Energiesysteme)
Sorptionsspeicher - Saisonale Wärmeleitung für die solare Raumheizung
(UFE SOLAR GmbH).



Last update: July 2007
© 2007 by Konrad-Zuse-Zentrum für Informationstechnik Berlin (ZIB)