North America · Air-Supply System Expansion for Environment Control of a Large Data Center

Project Background: An ultra-large data center in North America handles cloud computing and AI training, with dense server racks and high heat output. Besides precision cooling and liquid cooling, the facility needs substantial compressed air for positive-pressure air supply, pneumatic control valves, precision-air-conditioning humidification and pneumatic actuators of fire-suppression systems.

With rapid business growth, air demand kept rising. Original compressors approached capacity limits with worsening pressure fluctuation and lag in humidification and damper control. Long-term high-load operation raised energy consumption, conflicting with the data center's strict PUE efficiency targets. The system also lacked redundancy, posing interruption risk to environment control if the host failed.

Solution: A capacity-expanded variable-frequency screw compressor system was customized to auto-adjust output according to load peaks and valleys, avoiding prolonged idle operation. High-efficiency drying and filtration ensure clean, dry air to protect precision pneumatic components.

A "primary-backup with auto switchover" architecture ensures any unit can be maintained without interrupting supply. The system connects to the data center BMS for real-time monitoring and intelligent scheduling of pressure, flow and energy, coordinated with humidification and air-supply systems. Low-noise design and a dedicated sound-insulated room address the facility's noise sensitivity.

Results: After expansion, air supply capacity is sufficient with pressure fluctuation kept minimal, and humidification and damper response is more precise, significantly stabilizing temperature and humidity control. On-demand supply and intelligent scheduling cut compressor energy use by about 20%, supporting PUE targets.

Redundant architecture removes single-point-failure risk and greatly improves availability of environment control. The solution maintains uninterrupted critical operations while achieving significant energy and maintenance savings, offering a viable path for similar ultra-large data centers.