Brief portrait
For the German Air Traffic Control tower in Hanover, the existing heating system was thoroughly modernized to meet future requirements for energy efficiency (65% share of renewable energy according to the GEG) and security of supply. As part of this project, the previous heat generation system is being supplemented by a hybrid system combining heat pump technology with the existing peak-load boiler. In addition, adjustments are being made to the domestic hot water system and the cooling supply.
Hybrid Heating System / Domestic Hot Water System
- 44 kW water-to-water heat pump and 88 kW air-to-water heat pump, both using the natural refrigerant propane (R290), with flow temperatures up to 65 °C.
- Continued operation of the 130 kW gas condensing boiler as a peak-load and redundancy boiler.
- Central buffer storage tank (3,500 l) for efficient distribution to existing heating circuits and ventilation systems
- Domestic hot water production via a modern fresh water station
Cooling supply and waste heat recovery:
- Connection of the water-to-water heat pump to the return line of the existing chilled water network to utilize waste heat potential.
- Additional 2,000-liter chilled water storage tank for hydraulic decoupling between the chilled water network and the heat pump.
Conclusion:
The modernized utility supply concept for the DFS Tower in Hanover combines efficient heat pump technology with the existing boiler system and utilizes waste heat from the chilled water network. Through the use of a central buffer tank, a fresh water station, and hydraulically optimized integration, energy efficiency and operational reliability are significantly increased, creating a future-proof, eligible-for-subsidies heating and cooling supply.
