STULZ has updated its CyberRack Active Rear Door system, designed to meet the cooling requirements of high-density data centre environments. The solution is a space-saving rear-mounted heat exchanger equipped with electronically commutated (EC) fans that remove heat directly at the point where it is generated.
The enhanced CyberRack Active Rear Door delivers higher performance, greater flexibility and easier integration in both air-cooled and liquid-cooled data centre environments. Integrated sensors continuously monitor return and supply air temperatures within the server rack, allowing cooling capacity to automatically adjust according to the thermal load of the servers. This ensures stable, energy-efficient and reliable cooling performance regardless of workload fluctuations.
Designed for HPC and AI Workloads
The rapid growth of high-performance computing (HPC) and artificial intelligence (AI) applications has pushed server power densities to record levels, creating significant thermal management challenges. With data centre floor space often limited, the CyberRack Active Rear Door has been engineered to provide maximum cooling capacity within a footprint depth of only 274 mm.
The system delivers up to 49 kW of chilled water (CW) cooling and supports higher water temperatures as well as extended free cooling operation. This helps reduce overall energy consumption and operating costs while maintaining reliable cooling performance in high-density environments.
Flexible Deployment and Simplified Maintenance
Thanks to its compact design, the CyberRack Active Rear Door can be installed without repositioning existing racks, making it particularly suitable for retrofit projects and environments with limited floor space. Custom adapter frames enable seamless integration with a wide range of rack sizes and support standalone operation, supplemental precision cooling and hybrid deployments alongside direct-to-chip liquid cooling.
The system has also been developed with ease of maintenance in mind. A two-stage door opening mechanism of more than 90 degrees provides convenient access to fans and heat exchangers, while hot-swappable axial fans with plug connectors simplify servicing and reduce downtime. Differential pressure control automatically adjusts fan speed to match server airflow requirements, ensuring reliable operation with low noise emissions.
Intelligent Control and Reliable Operation
At the core of the system is the STULZ E² intelligent controller with a 4.3-inch touchscreen interface. The unified control platform supports advanced functions including redundancy management, parallel operation of multiple units, emergency operating mode and seamless integration with building management systems (BMS).
The updated CyberRack Active Rear Door reflects STULZ’s commitment to delivering cooling solutions that combine advanced technology, intelligent design, user-friendly operation, energy efficiency, flexibility and reliability. It is particularly well suited to environments where space is limited, heat loads are high or raised floor infrastructure is not available, providing highly efficient cooling regardless of server load.
