K.E.D. relies on ROXSTAsmart at the Allianz Arena
K.E.D is modernizing the main kitchen of the Allianz Arena with the ROXSTAsmart. Over 2,000 meters of piping, modern CO₂ technology, and smart control systems ensure efficient cooling and a future‑focused approach to sustainability.
In the vibrant city of Munich, the imposing structure of the Allianz Arena rises, home to the renowned FC Bayern Munich. But behind the scenes of this modern football stadium lies a complex world of refrigeration and air conditioning, crucial for the smooth operation of the gastronomic facilities.
Installation under special conditions
K.E.D Kälte- und Klimatechnik GmbH faced the challenge of equipping the main kitchen of the Allianz Arena with the innovative ROXSTAsmart. A mammoth task, as the existing system dated back to 2006 and was in urgent need of modernization. However, the team at K.E.D did not shy away from the challenge and set out to lay over 2,000 meters of piping throughout the entire stadium. A logistical feat considering the size and complexity of the Allianz Arena.
The installation of the new compound systems was anything but a walk in the park, as maneuvering in a stadium without freight elevators and only stairs for access is quite unique. But K.E.D tackled this un-usual challenge with a smile and the support of a moving company.
The total cooling area of 315 square meters was distributed among 16 standard refrigeration and freezer rooms to ensure efficient supply to the cooling points. Two ROXSTAsmart units were deployed, with two larger rapid coolers each connected to the booster stage with 35 kW cooling capacity at -20 °C. This innovative technology ensures that all areas of the stadium are always supplied with fresh food and drinks. The decision to use ROXSTAsmart was a step towards the future: The systems operate with environmentally friendly refrigerant R744 and utilize heat recovery for heating purposes, highlighting a commitment to sustainability and environmental protection.
But that's not all: TEKO completed the delivery package with four CO2 gas coolers and Whiteline evaporators to maximize efficient cooling in the main kitchen. Two gas coolers were connected to each ROXSTAsmart unit, providing a return cooling capacity of 50 kW per unit. A specially tailored evaporator was delivered for each cooling room according to required temperatures and spaces.
Intelligent control technology from Wurm
The installed Frigotakt+ control system by Wurm GmbH & Co. KG Elektronische Systeme is an innovative technology enabling performance-dependent compressor switching. Cooling points, compressors, and condensers are controlled holistically, focusing on individual cooling temperatures for each cooling point. The system utilizes powerful microcontrollers to model and select online the most energy-efficient operating point based on operational characteristics of all refrigeration components. The optimal operating point is continuously recalculated in advance to minimize compressor switches as much as possible, resulting in an extremely continuous, forward-looking, and energy-efficient operation mode of the Wurm system. Additionally, Frigotakt+ provides insights into potential efficiency enhancements for K.E.D. Through this intelligent control technology, not only precise control of cooling temperature is ensured but also optimal utilization of energy sources is guaranteed.
Commissioning
Partial commissioning took place in August 2023 when 8 cooling rooms were put into operation. These rooms were already present before renovation and equipped with new evaporators last summer as well as connected to the CO2 compound system. Full commissioning of new cooling rooms and rapid coolers took place in January 2024.
Despite all challenges, K.E.D successfully completed the installation, making a significant contribution to smooth operations at the Allianz Arena.
This project shows that we can deliver creative solutions even in challenging situations. We will continue to pursue innovative approaches and inspire our customers with tailored refrigeration and air‑conditioning solutions.
- End customer: Allianz Arena, Munich
- Implemented by K.E.D. Kälte- und Klimatechnik GmbH
- 2× ROXSTAsmart CO₂ refrigeration racks
- 315 m² cold room area – 16 medium and low temperature rooms
- Two blast chillers, each 35 kW at -20 °C, connected to the booster stage
- 4× CO₂ gas coolers (50 kW heat rejection each), two per ROXSTAsmart
- Individually designed Whiteline evaporators for each cold room
- Frigotakt+ control system for efficient, predictive compressor and system control
- More than 2,000 m of piping installed throughout the stadium