Solar district heating in Friedrichshafen, Germany
In addition to solar water heating, more and more municipalities are launching projects to utilize solar energy for heating (or cooling), too. Such installations require a common storage tank that is able to feed hot water for a long period into the local district heating network. They may, depending on their size, meet as much as 40-70% of the annual heating needs of a residential estate. Moreover, these systems can use innovative techniques for interconnecting or feeding into a heat network, this providing huge energy savings compared to single installations. In Friedrichshafen, a residential estate with some 600 housing units has been supplied by a small-scale solar district-heating system since 1996.
Keywords: Thermal solar and bioclimatic design; Sustainable urban planning
This case study was prepared by Energie-Cités in cooperation with Technische Werke Friedrichshafen GmbH as well as Steinbeis Transferzentrum in Stuttgart, and with the financial support of European Commission DG XVII within the scope of the ALTENER Programme. A 10-page full-length version (in German) is available from Mr Morgenbrodt, Technische Werke Friedrichshafen GmbH and from Energie-Cités.