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Concept for exergy balancing on community level for enhanced sustainable energy performance in a residential development in Kassel

: Sager, C.

Rode, C. ; Technical University of Denmark -DTU-, Lyngby:
8th Nordic Symposium on Building Physics in the Nordic Countries 2008. Proceedings. Vol.2 : Copenhagen, June 16-18, 2008
Lyngby, 2008 (DTU Byg Report 189)
ISBN: 978-87-7877-265-7
Nordic Symposium on Building Physics in the Nordic Countries <8, 2008, Kopenhagen>
Conference Paper
Fraunhofer IBP ()

At the time being energy efficiency optimisation is majorily focussed on the building physics and technical systems of single buildings. While the energy performance that can be achieved in the building focus is determined by aspects as technological feasibility, economical potential of the owner and individual know-how of planners, the realisation of energy efficiency potentials on a larger scale such as on estate or community level faces decisive additional obstacles mainly on technological and judicial level. Nevertheless the potential for energy savings is significantly higher taking into account a linkage between several units of use. Exergy balancing has the potential of making possible efficiency relationships between supply and demand sides visible and therewith calculable. In a pilot project in Kassel this approach is being traced, using exergy analysis for the design of a low-energy, low-exergy housing estate in an existing community structure. The goal is to supply all buildings on the site with lowexergy energy sources, implying the optimised energetic building design and optimised supply structure including utilisation of the district heating return line. For the pilot all planning aspects starting from legal and economic aspects to technological and communication aspects are covered. The goal is to supply a general guideline on calculation procedures, design and communication strategies and clarify legal questions and boundary conditions for the development of similar projects. At the Nordic Symposium of Building Physics an overview on the project will be given, stating the specific situation as well as generalizable approaches.