Soaring Power Consumption of AI Computing: How to Ensure Liquid Cooling Components "Can Be Assembled Correctly, Fit Tightly, and Allow Smooth Flow"?

 

Industry Background: The Liquid Cooling Era — From "Optional" to "Essential"

 

With the explosive growth of AI large model training and high-performance computing, computing infrastructure is undergoing unprecedented transformation. For companies represented by NVIDIA and Google, the power consumption of a single chip has already exceeded the kilowatt level (for example, Google's TPU V8 consumes up to 1,300W), while the power density of a single rack has reached as high as 100kW–300kW. Conventional air-cooling heat dissipation has approached its physical limits. Liquid cooling technology (especially cold-plate and immersion cooling) has become an "essential choice" to ensure the stable operation of high-compute data centers.

However, the efficient operation of a liquid cooling system is highly dependent on the quality and precision of its core components. The machining precision of key components—such as cold plates, quick couplings, and distribution manifolds—directly affects heat dissipation efficiency and leak-proof reliability. Against this backdrop, Wenzel, as a world-leading provider of metrology solutions, is able to address the quality control challenges of liquid cooling components in this field—essentially ensuring that the workpieces "can be assembled correctly, fit tightly, and allow smooth flow."

 

WENZEL's Precision Measurement Solutions for Liquid Cooling Core Components

 

In liquid cooling systems used in high-compute data centers, cold plates, liquid cooling manifolds, and quick couplings are subject to particularly stringent quality requirements. To address the diverse measurement needs of different components, Wenzel offers a combined solution.

 

1.Core Component: Precision Geometric Measurement of Liquid Cooling Plates

 

The liquid cooling plate is a critical component in the liquid cooling system that comes into direct contact with high-power chips. The machining precision of its internal microstructure—such as channel depth, fin height, fin thickness, and tooth pitch—directly determines the coolant flow characteristics and heat exchange efficiency. Meanwhile, the external mounting dimensions and interface position accuracy are essential to assembly reliability and sealing performance.

To address these measurement requirements, Wenzel offers the following combined solution:

• Microstructure Measurement: The CORE series optical high-speed scanning system enables efficient, non-contact precision scanning of minute features on the liquid cooling plate, accurately capturing key parameters such as channel depth, fin height, fin thickness, and tooth pitch. These parameters serve as core inputs for evaluating flow resistance characteristics and heat exchange area, which are difficult to capture efficiently and comprehensively using traditional contact measurement methods.
• External Geometric Dimension Measurement: While completing the internal microstructure scan, the CORE system can simultaneously acquire external mounting dimensions, inlet/outlet port position accuracy, flatness, and other geometric tolerance data of the liquid cooling plate, enabling comprehensive inspection of both internal and external features in a single clamping. The scanning speed saves approximately 4× the measurement time, making it suitable for in-process quality control in batch production.
• Combined Measurement Capability: When encountering measurement limitations such as deep holes or undercuts where optical methods reach their limits, the CORE system can perform measurements using a contact probe. It automatically switches between optical and contact probes, ensuring full feature coverage.
   

2. Distribution Manifold: Multi-Port Position Accuracy and Assembly Dimension Inspection

 

In liquid-cooled data centers, the liquid cooling manifold (water distributor/flow divider) forms the core distribution network of the cooling system. It functions like the cardiovascular system of the human body, responsible for delivering coolant from the main loop accurately, evenly, and efficiently to every heat-generating unit requiring cooling—such as server CPUs, GPUs, or entire racks. The precision requirements for its multiple connector ports and quick-connect fittings are extremely high. These components require not only control of geometric tolerances such as position accuracy and perpendicularity, but also involve thread parameters and sealing surface quality—resulting in multiple inspection dimensions and demanding requirements.

Inspection Requirements: Position accuracy and axis perpendicularity of each interface; flatness of sealing end faces; inner and outer diameter tolerances; overall length and width dimensions; surface roughness of sealing surfaces.

Solution: XO/LH Series High-Precision Multi-Sensor Coordinate Measuring Machine

• Accurately measure the position accuracy and axis perpendicularity of multiple connectors to ensure precise alignment with server nodes, eliminating leakage risks caused by installation stress.
• Evaluate the flatness of the sealing end face to ensure uniform compression of the sealing gasket.
• Measure bore diameters and external dimensions at multiple points to verify assembly compatibility.
• The WENZEL XO/LH series coordinate measuring machine can be equipped with a roughness probe to complete sealing surface roughness measurement without the need for changing equipment.
   

3.UQD Quick Coupling: High-Precision Mating Dimension and Sealing Structure Inspection
 

The UQD quick coupling is the most numerous and most frequently replaced connecting component in liquid cooling systems, and also represents the link with the highest leakage risk. Each server node is typically equipped with two couplings, and a standard rack may contain over a hundred of them. Any dimensional deviation or sealing defect in a single coupling can lead to coolant leakage, resulting in severe equipment damage incidents.

Inspection Requirements: Socket inner diameter and plug outer diameter; nominal insertion distance and minimum insertion distance; cone position and sealing surface profile; termination thread specification; sealing surface roughness.

Solution: XO/LH Series High-Precision Multi-Sensor Coordinate Measuring Machine

• Precisely measure the socket inner diameter and plug outer diameter to ensure a precision fit between the socket and plug.
• Accurately verify the nominal insertion distance and minimum insertion distance to ensure blind-mating reliability.
• Perform high-precision inspection of termination threads to ensure compliance with relevant standards and guarantee interchangeability.
• Simultaneously, one-stop measurement of sealing surface roughness can be completed to ensure long-term wear resistance.

Key Features: The XO/LH series high-precision multi-sensor coordinate measuring machine offers multi-functionality in a single system—comprehensive inspection of geometric dimensions, geometric tolerances, thread parameters, surface roughness, and sealing structure. With micron-level accuracy, it supports automatic probe switching and programmed measurement.

4. Industrial CT: Integrated Non-Destructive Inspection of Internal and External Structures

 

Internal defects in welded components and assemblies (such as insufficient brazing, flow channel blockage, and seal misalignment) are often the root causes of on-site leakage.

Solution: Industrial Computed Tomography System

• Identify internal flow channel blockages, porosity, and brazing layer defects within liquid cooling plates without the need for sectioning.
• Inspect the internal valve core structure, spring position, and sealing ring assembly status of UQD couplings.
• Evaluate internal defects at welded joints of distribution manifolds as well as internal surface roughness of the pipes.
• Simultaneously complete external geometric dimension measurement, achieving integrated inspection of internal and external features.

5. Production Line Integration: Automated and Intelligent Inspection

 

In response to the demands of mass production of AI servers, Wenzel's automated measurement workstation can integrate multiple measurement devices—including the CORE series optical high-speed scanning system, multi-functional coordinate measuring machines, and industrial CT systems. Through deep integration of robotic loading/unloading and measurement software, it enables fully automatic, high-efficiency sampling or 100% inspection of liquid cooling components. Inspection data can be uploaded in real-time to the manufacturing execution system (MES), forming a closed-loop quality control that helps manufacturers achieve "zero-defect" delivery.

 

Conclusion

 

In the "core engine" domain of high-compute data centers and AI infrastructure, the manufacturing quality of liquid cooling components directly determines the stability and service life of computing clusters. Leveraging the CORE series optical high-speed scanning system, multi-functional coordinate measuring machines, industrial CT, and automation integration capabilities, Wenzel provides dedicated and comprehensive geometric accuracy measurement solutions for cold plates, distribution manifolds, and precision connectors within liquid cooling systems. These solutions ensure that every liquid cooling component "can be assembled correctly, fit tightly, and allow smooth flow," guaranteeing that AI servers can continue to operate efficiently in a safe and reliable thermal environment under kilowatt-level power consumption.