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What is a Coolant Distribution Unit (CDU)?

A cooling distribution unit (CDU) is a system that manages and distributes coolant within a liquid-cooled data center environment. It acts as the interface between the facility water system and the IT equipment cooling loop.

In a typical setup, a liquid cooling CDU:

l Transfers heat from IT equipment to facility water

l Regulates coolant flow, pressure, and temperature

l Ensures safe and efficient thermal management

CDUs are essential in data center architectures, particularly where high TDP (Thermal Design Power) workloads—such as AI, HPC, and GPU clusters—generate significant heat loads.

Achieve Hgh-density Cooling

Modern processors and accelerators can exceed 500W–1200W TDP per chip, making air cooling insufficient. CDUs enable direct-to-chip cooling, supporting ultra-high rack densities.

Build Energy-efficient Data Centers

By using CDU for liquid cooling, the reliance on CRAC/CRAH systems can be significantly reduced, the PUE (Power Utilization Efficiency) can be improved, and energy consumption can be decreased.

Optimized Heat Dissipation

The CDU utilizes advanced heat exchange technology to efficiently transfer heat from the secondary loop to the facility water, ensuring stable cooling performance even under peak loads.

Reduce Operating Expenses (OpEx)

1. Reduce energy costs 2. Reduce maintenance complexity 3. Extend the service life of the hardware

LORI CDU Series Product

In rack CDUs

Installed directly within server racks Enables localized cooling control Reduces piping complexity and improves scalability

In Row CDUs

Placed between the cabinets Balancing centralized management and modular deployment Suitable for medium-sized and large-scale data centers

Liquid-to-Air (L2A) CDUs

Utilizing ambient air for heat dissipation Suitable for facilities with edge deployment or without water cooling systems

Liquid to Liquid (L2L) CDUs

Transfer heat between two liquid circuits Applicable to facilities equipped with existing chilled water infrastructure High efficiency, with minimal heat loss

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How a CDU Works

At the heart of every data center CDU is a closed-loop cooling system designed for precision and reliability:

Heat Absorption

Coolant absorbs heat from IT components (such as CPUs and GPUs) via cold plates or immersion systems.

Secondary Loop Circulation

The heated coolant flows through the secondary loop, which is isolated from the facility water to ensure safety and control.

Heat Exchange

A plate heat exchanger transfers heat from the secondary loop to the primary facility loop, ensuring that the two fluids do not mix.

Temperature Regulation

Variable-speed pumps dynamically adjust flow rates based on thermal load to ensure optimal performance.

Monitoring and Protection

The integrated system continuously monitors pressure, temperature, and flow rates, and activates safety protections when necessary.

Lori CDU Technical Advantages

Lori CDU adopts advanced engineering design to meet the demands of next-generation data centers.

High-efficiency plate heat exchanger

Compact design with exceptional heat transfer performance; minimizes temperature difference to achieve maximum efficiency.

Smart Variable-Speed Pumps

Dynamically adjust flow rates based on workload; reduce energy consumption and mechanical wear.

Advanced Leak Detection System

Real-time monitoring with rapid response; ensures operational safety and uptime.

Coolant Compatibility

Supports water, ethylene glycol blends, and dielectric coolants; flexibly integrates into various liquid cooling strategies.

Stable Secondary Loop Design

Isolates IT equipment from facility water; enhances system reliability and maintainability.

PROFESSIONAL HIGH POWER COOLING SOLUTION SERVICE

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