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Germany's Energy-Positive Town Hall Unveiled
20 Aug
Summary
- Freiburg's city hall produces more energy than it consumes.
- High-performance solar panels are integrated into roof and facade.
- The building uses groundwater for its heating and cooling systems.
Completed in 2017, Freiburg's modern city hall stands as a landmark energy-positive building. It was designed to produce more electricity than it needs for heating, cooling, ventilation, and lighting. This achievement is realized through a comprehensive energy concept.
High-performance solar panels are integrated into both the roof and facade, generating electricity while providing shade. The building envelope boasts exceptional thermal insulation, enabling low-temperature heating and efficient cooling. A ventilation system with heat recovery minimizes energy loss.
Furthermore, the building leverages groundwater for its heating and cooling. A heat pump system handles heating, while a plate heat exchanger provides cooling. This integrated approach ensures minimal energy demand, complementing its significant renewable energy generation.
The surplus electricity produced by Freiburg's town hall is fed back into the grid, making it a contributor to the wider energy network. Recognized as Europe's largest surplus-energy building, it holds a DGNB Climate Positive certification, showcasing its commitment to environmental sustainability.
