A Bank Headquarters Data Center in Hangzhou

HVAC System Configuration

The data center is equipped with a dual-cool source air conditioning system , featuring water-cooled chillers as the primary cooling source and air-cooled chillers as the backup - two independent cooling sources providing mutual redundancy to ensure uninterrupted year-round operation. The system incorporates plate heat exchangers to maximize free cooling during transition seasons and winter, significantly reducing compressor runtime. A thermal energy storage tank is deployed to enable synergy between free cooling and mechanical cooling, while also providing chilled water reserve for continuous cooling in the event of a power outage. The terminal cooling is served by air-cooled precision air conditioning units , delivering stable temperature and humidity control throughout the year to ensure the security and reliability of financial data operations. A DCIM (Data Center Infrastructure Management) system is deployed for 24/7 real-time monitoring and alerting - covering temperature, humidity, leak detection, power status, and UPS operation - enabling unattended operation and intelligent O&M management.

Operation Strategy

An intelligent group control strategy optimizes energy performance throughout the year:

• Summer Mode: Water-cooled chillers operate as the primary cooling source at high efficiency; air-cooled chillers remain on standby.

• Transition Season Mode: When outdoor conditions permit, plate heat exchangers are prioritized for free cooling, with compressors either shut down or operating at reduced load.

• Winter Mode: The entire cooling load is handled by plate heat exchangers; chillers are completely shut down.

• Thermal Storage Tank: Charges during off-peak nighttime hours and discharges during peak daytime hours to reduce operating costs, while also ensuring uninterrupted cooling for the data center during power outages.