Liquid Cooling Loops
Liquid Cooling Loop System Manufacturer – Closed-Loop Liquid Cooling for Data Centers and AI Servers
What is a liquid cooling loop?
The Liquid cooling loop (LCL) is a specialized assembly that combines direct to chip liquid cooling cold plates, pre-assembled fittings and tubing to effectively form an easy-to-install device.
With the continuous progress of AI, cloud computing, IoT, blockchain and other technologies, issues such as high heat density and huge energy consumption also pose higher challenges to data center cooling technology. In AI servers of data centers, each heat source such as CPU or GPU requires a corresponding cold plate to meet the demand for high-performance heat dissipation. Commonly, liquid cooling loops are available for two, four, six, eight or more processors. CGcooler’s liquid cooling loops, direct to chip liquid cooling cold plates, piping and other liquid cooling components are designed to serve data center liquid cooling systems with high quality and performance.Compared with air cooling, the thermal conduction efficiency of LCL has increased by 3 to 5 times. It achieves higher computing density within the same area while significantly reducing energy consumption.
High Performance Liquid Cooling Loop Design
Liquid cooling loops typically consist of a liquid cooling cold plate, a pump, a heat exchanger, and piping or hoses. The cold plate transfers heat to the liquid coolant flowing through the cold plate. The heated coolant is then pumped through a heat exchanger where heat is transferred from the coolant to ambient air, a CDU, dry cooler, or in the case of a liquid-liquid heat exchanger, to another liquid coolant. The cooled coolant then flows back to the cold plate through pipes or hoses, completing the cooling loop.
When designing a modified standard or customized liquid cooling loop, consideration must be given to material compatibility, corrosion protection, condensation control, location of the liquid cooling loop, standard versus customized parts, fittings, accessories, connectors, hoses, and maintenance and service requirements. When properly integrated into a system, liquid cooling can provide efficient heat dissipation with low risk.
Two Core Architectures: Open-Loop vs. Closed-Loop Systems
The fundamental difference between the two systems lies in whether the coolant is exposed to the external environment.
Open-Loop Liquid Cooling Systems
How it Works: Coolant (usually water) absorbs heat from IT equipment. Instead of recirculating within a sealed system, the warmed coolant is discharged (e.g., to a drain, cooling tower basin, or external water body). Fresh, cool coolant is constantly drawn in from an external source to replace it.
Pros: Simpler initial setup (no heat exchanger needed for the primary loop), potentially lower upfront cost if a cheap/free water source is abundant.
Cons:
1. High Water Consumption: Constant intake/discharge wastes significant water – a major sustainability concern.
2. Water Treatment Critical: Incoming water must be meticulously filtered and treated to prevent scaling, biological growth (algae, legionella), and corrosion within sensitive server components. Maintenance demands are high.
3. Environmental Impact: Discharging warm water can have ecological consequences, and water sourcing may be restricted.
Risk: Contaminant ingress can rapidly damage expensive hardware.
Due to the unsustainable high water consumption, high treatment costs and reliability risks, open-loop systems are generally not recommended for modern data centers. Outside of specific niche applications with abundant suitable water sources, they are rarely seen in new deployments.
Closed-Loop Liquid Cooling Systems
How it Works: Coolant (water or dielectric fluid) is permanently sealed within the system. It circulates endlessly:Absorbs heat from components.Flows to a Heat Exchanger (e.g., within a CDU).Transfers heat to a separate, secondary cooling loop (which might use water from a cooling tower, chiller plant, or ambient air via a dry cooler).Cooled primary coolant returns to the IT equipment.The primary coolant loop never mixes with the secondary loop or the external environment.
Pros:
1. Minimal Water Consumption: Only minor makeup water is needed for the secondary loop (e.g., evaporative cooling tower losses), reducing usage by >99% compared to open-loop.
2. Protection & Reliability: The sealed primary loop protects components from external contaminants and corrosion. Coolant quality is tightly controlled.
3. Flexibility: Secondary loop options (chilled water, adiabatic cooling, dry cooler) adapt to climate and site infrastructure.
4. Sustainability: Drastically reduced water footprint and potential for very low PUE.
Cons: Higher initial complexity and cost (requires heat exchangers/CDUs), requires proper maintenance of both primary and secondary loops.
Closed-loop systems are the industry standard and CGcooler’s core focus. We design robust, leak-proof CDUs and manifolds, utilize advanced corrosion inhibitors for water-based loops, and integrate seamlessly with diverse secondary cooling infrastructures for maximum efficiency and reliability.
Ultra-Low PUE
Achieve PUEs consistently below 1.08, slashing operational energy costs.
Water Conservation
Our closed-loop designs are central to sustainable water stewardship in data centers.
Unmatched Reliability
Precision-engineered components, leak detection systems, and high-quality coolant management ensure>99.999% infrastructure uptime.
High-Density Ready
Efficiently cool racks exceeding 50kW+, enabling next-gen AI/GPU deployments.
CGcooler's Liquid Cooling Loops
In the realm of data centers and AI servers, the relentless pursuit of high performance and efficiency continues unabated. CGcooler’s direct to chip liquid cooling loop simplifies the installation process, facilitating easier maintenance of circuit boards, while its hot-swappable design further enhances operational efficiency.
