Global CDU Industry Pattern and In-depth Analysis of Top 20 Liquid Cooling Suppliers
Driven by explosive AI computing demand and dual-carbon strategies, liquid cooling has evolved from an optional solution to a mandatory standard for modern data centers. As the core hub of liquid cooling systems, the Cooling Distribution Unit (CDU) undertakes critical functions including flow distribution, temperature regulation and pressure balance. Its technological advancement directly determines data center PUE performance and operational reliability. This article deeply analyzes the global CDU industrial landscape and the technical strengths & market layout of top-tier suppliers worldwide.
Widely adopted for facility renovation and low-density computing scenarios, the versatile data center air liquid cooling CDU realizes heat dissipation through air-liquid heat exchange. It eliminates reliance on chilled water pipe networks, enabling flexible deployment and low-cost upgrades for traditional data centers.
Specially optimized for super-high power computing scenarios, the robust high density rack air liquid CDU adapts to extreme heat load of dense AI racks. It delivers stable temperature control and effectively solves heat accumulation pain points of high-density server clusters.
Designed for cabinet-level precision heat management, the rack-mounted server rack air liquid CDU supports in-rack integrated deployment. Featuring compact structure and short circulation loops, it reduces pipeline energy consumption and enhances fault isolation capability.
Tailored for high-performance AI computing hardware, the dedicated GPU cabinet air liquid CDU matches the high heat generation characteristics of GPU training and inference chips. It ensures consistent heat dissipation efficiency and long-term stable operation of AI cabinets.
Built for full-scenario AI infrastructure iteration, the high-adaptability AI server air liquid cooling CDU perfectly fits the upgrading demands of new-generation AI servers. It balances deployment flexibility and cooling performance for both new construction and legacy renovation projects.
Serving as the core thermal control equipment for digital infrastructure, the high-reliability liquid cooling CDU integrates heat exchangers, pumps, filters and intelligent control modules. It forms a closed-loop cooling system to guarantee efficient and safe coolant circulation.
Undertaking overall fluid scheduling and thermal management tasks, the standard liquid cooling distribution unit precisely distributes coolant flow and balances system pressure. It is the indispensable core component supporting the stable operation of the entire liquid cooling loop.
Integrating systematic heat exchange and intelligent regulation capabilities, the efficient liquid CDU cooling system covers full-link temperature, flow and pressure monitoring. It continuously optimizes data center energy efficiency and helps achieve ultra-low PUE operation.
A complete CDU consists of plate heat exchangers, circulation pumps, makeup pumps, filters, water immersion sensors, electric regulating valves, stainless steel pipelines, flow meters and controllers. As the core component of liquid cooling systems, it precisely regulates and distributes coolant to support efficient and stable heat exchange for data center equipment.
Current CDU products present obvious morphological and technical differentiation, mainly divided into cabinet-type and in-row frame-type structures. Cabinet-type CDU is deployed independently with large cooling capacity and strong scalability, suitable for centralized cooling of ultra-large-scale data centers. Frame-type CDU is integrated inside server cabinets for distributed proximity cooling, perfectly matching edge computing and high-density AI cluster scenarios.
In terms of heat exchange principles, the industry forms two mainstream technical routes: liquid-to-liquid and air-to-liquid CDU. Liquid-to-liquid CDU connects with factory chilled water systems through plate heat exchangers, achieving ultra-high heat transfer efficiency and PUE below 1.05, which is the preferred solution for new high-density full liquid cooling data centers. Air-to-liquid CDU dissipates heat directly through built-in air cooling modules without relying on chilled water infrastructure, featuring low deployment difficulty and strong compatibility, and is widely used for traditional air-cooled room renovation.
In terms of system architecture, centralized and distributed CDU solutions have their own advantages. Centralized CDU supports megawatt-level single-unit cooling capacity and serves entire rows of cabinets through main pipelines with low initial investment. Distributed CDU adopts independent cabinet-level short-loop design, featuring low pressure loss, strong fault isolation and higher operational stability, which is more suitable for heterogeneous high-density AI computing scenarios.
Global top CDU suppliers have formed differentiated technical barriers and market layouts. Domestic leading manufacturers include Inspur, HPE, Invicool, Yimikang, Schneider, BHE Electric, CAS Jiyuan, Lianli Electronics, Yuandi Technology, Thermal Control Technology, STULZ, Delta, Cooler Master, and Kunshan Limeng. Their core advantages cover negative-pressure vacuum circulation, megawatt-level high-power cooling, AI intelligent energy saving, phase-change heat dissipation and military-grade ultra-wide temperature adaptation, covering cloud computing, finance, telecommunications and supercomputing scenarios.
International mainstream suppliers include Vertiv, Nidec, CoolIT Systems, LiquidStack and Refroid. With profound accumulation in high-power modular design, zero-leakage technology, IE5 high-efficiency pump group control and large-scale gigawatt-level cooling systems, they have long-term supporting relationships with NVIDIA, Meta, Microsoft and other global cloud giants, leading the technical iteration of high-end liquid cooling CDU.
As the core "heart" of AI liquid cooling infrastructure, CDU determines the energy efficiency ceiling and operational stability of future data centers. Driven by iterative upgrading of high-power AI chips and rigid low-carbon policies, CDU technologies such as negative-pressure circulation, modular expansion and intelligent precise control will continue to iterate. Supplier competition has evolved from single equipment manufacturing to full-link system solution capabilities, becoming a core strategic link in supporting the long-term development of global digital infrastructure and high-end computing industry.
Trusted worldwide as a leader in liquid cooling, EXTRCOOL provides a full suite of thermal management hardware—featuring dual-mode CDUs, manifold assemblies, cold plates, rear-door heat exchangers, dry coolers, and containerized units—all custom-engineered for AI and HPC data centers. Built for reliable performance, seamless integration, and straightforward scalability, these solutions offer a complete turnkey cooling package. We serve data center operators and enterprise clients across North America, South America, Europe, Asia, and Africa.
