The supervising of large-scale solar thermal systems in the frame of the program Solarthermie-2000 produced plenty of reliable data which enable an evaluation and optimisation of a system. The technology of preheating domestic hot water in buildings with a high hot water consumption has passed the demonstration phase. The technology is now subsidized by the market incentive program like small scale solar thermal systems as well.

The new program Solarthermie2000plus extended the task for large-scale solar thermal systems. The solar fraction of the total thermal energy needed for a building is supposed to be over 10 %. This means a contribution of the solar plant to the heating. The focus of the new program is on combined systems for domestic hot water and space heating generation, local network heating, especially in combination with other renewable energies like biomass and new applications for large-scale solar thermal systems.

References

/1/ www. fh-offenburg. de/mv/st2000

/2/ S. Himmelsbach, E. Bollin, U.-M. Klingenberger; “Solare Dusch — und

Beckenwassererwarmung in der albtherme Waldbronn”; Proceedings of the 13. Symposium Thermische Solarenergie in Staffelstein, OTTI Regensburg, 2003 /3/ F.-A. Peuser, K.-H. Remmers, M. Schnauss; “Solar Thermal Systems”; Solarpraxis Berlin, 2002