YD/T 3980-2021 in English

Core Technology Innovation and Standard Framework

This standard systematically defines the application specifications of cold plate liquid cooling technology in data centers for the first time. Through the standardized design of key components such as liquid cooling cabinets and CDU, the PUE value can be reduced by more than 30%. The main breakthroughs are reflected in:

Analysis of key technologies of liquid cooling system

1. Cold plate liquid cooling architecture

The system adopts a three-stage heat exchange architecture: chip→cold plate→CDU→cooling tower, among which the water distribution manifold must meet the following requirements:

• Branch flow deviation ≤5%
• Pressure bearing capacity ≥1.5MPa
• Quick connector plug-in life ≥5000 times

2. Coolant parameter specifications

Key indicators of secondary side coolant:

Implementation suggestions and risk control

1. Deployment strategy

It is recommended to adopt the W3 temperature level (2-32℃) solution to balance the initial investment and operating costs:

• North China: Cooling tower + dry cooler hybrid mode
• South China: Chiller auxiliary operation

2. Key points of operation and maintenance

A three-level monitoring system must be established:

1. Real-time monitoring of CDU inlet and outlet pressure difference (threshold ±15%)
2. Monthly water quality testing (focus on copper ions ≤0.1ppm)
3. Quarterly pipeline air tightness testing

Technology evolution trend

The next generation technology will develop towards two-phase immersion, and the current standard has reserved interfaces:

• CDU supports high-temperature return water above 45°C (W5 level)
• Liquid cooling joints are compatible with dielectric fluids
• The monitoring system adds a phase change detection module