How to Choose the Right Liquid Cold Plate: Types, Performance & Cost Comparison

1. What is a Liquid Cold Plate?

A Liquid Cold Plate is a high-efficiency heat dissipation component that uses internal coolant (such as water, glycol solutions, or specialized refrigerants) to directly absorb heat from electronic devices. The core structure consists of a metal plate embedded with precision-designed channels, enabling dual-mode heat transfer: thermal conduction and convection. Compared to traditional air cooling, a liquid cold plate can offer 10–50 times higher thermal conductivity, making it the preferred thermal solution for high-power density applications.

2. Types of Liquid Cold Plates

Liquid cold plates can be categorized into four main types, each with distinct technical characteristics:

• Stamped Liquid Cold Plate
  • Structure: Flow channels are integrally formed by stamping aluminum plates, often combined with internal fins for enhanced heat exchange. Highly flexible channel designs with large contact surface areas.
  • Thermal Performance: Excellent efficiency (average temperature 8.5°C lower than embedded tube types), surface temperature difference controlled within <5°C. Ideal for high-heat-density applications like battery packsand server CPUs.
  • Manufacturing Process: Uses controlled atmosphere brazing (CAB) or vacuum brazing. Leak tested 100%, suitable for mass production. High mold cost, but short unit processing time

• CNC-Machined Liquid Cold Plate

  • Structure: Channels are precision-milled using CNC machining, supporting complex geometries such as micro-pin arrays and serpentine paths. Highest level of customization.
  • Thermal Performance: High channel accuracy and low pressure drop (ΔP < 50kPa). Excellent thermal uniformity, but requires thicker baseplates (≥10mm) to reduce spreading resistance.
  • Manufacturing Process: Relies on high-precision CNC machining and brazing. Time- and material-intensive, resulting in significantly higher costs.

• Embedded Round Tube Cold Plate
  • • Structure: Copper or stainless-steel round tubes are embedded in grooves in the aluminum plate. Comes in continuous or manifold-style configurations.
  • Thermal Performance: Suitable for medium to low heat loads (<1kW). Adding turbulence enhancers improves performance by 10–11%. However, limited contact area leads to lower heat transfer efficiency.
  • Manufacturing Process: Simple and cost-effective, with no brazing required. Uses mechanical pressing for tube fixation, offering high production efficiency.

• Flat Tube Manifold Cold Plate
  • Structure: Uses multi-port extruded (MPE) aluminum flat tubes with a typical thickness of 4–10mm. Large cross-sectional flow area with internal turbulence structures (Reynolds number Re > 40 indicates turbulence).
  • Thermal Performance: Low pressure drop and excellent compatibility with high-viscosity fluids (e.g., glycol, oil). Outstanding surface thermal uniformity and minimal vertical height requirements.
  • Manufacturing Process: One-piece hydraulic forming with built-in turbulence features. Low mass production cost but less adaptable to complex cross-sections compared to CNC machining.

3. Cost and Economic Comparison

• Breakdown of Manufacturing Costs

Each type of liquid cold plate involves different levels of material, tooling, machining, and labor costs. In general:

• • CNC-machined plateshave the highest individual cost due to tooling complexity.
  • Stamped and flat tube platesbenefit most from large-scale production.
  • Round tube platesoffer the lowest entry cost.

• Total Cost of Ownership (TCO)

Initial Investment:
CNC > Stamped > Flat Tube ≈ Round Tube.
Cold plates account for ~16.4% of total CAPEX in a complete liquid cooling system.

• Operational Costs:
• • Flat and round tube cold plates have lower pressure drops, reducing pump power consumption by 10–15%.
  • Stamped cold plates offer low maintenance due to modular design.
  • CNC plates provide excellent sealing but are more complex to service.
• Economies of Scale
• • Mass production from 100,000 to 1 million units can reduce stamped cold plate cost by over 52%(as seen in Huawei’s implementation).
  • As 3D printingbecomes more mature, CNC cold plate costs are expected to drop by another 25%.

4. Summary Table: Liquid Cold Plate Type Comparison

5. Conclusion

Driven by performance optimization and cost-reduction demands, stamped and flat tube liquid cold plates are becoming mainstream solutions, offering a balanced blend of efficiency and affordability. CNC-machined cold plates remain dominant in high-end applications requiring extreme precision, while round tube designs continue to serve specific industrial use cases.

Explore Tongyu’s Advanced Liquid Cold Plate Solutions

At Tongyu, we specialize in high-performance liquid cold plate technologies tailored to meet the evolving thermal management needs of EVs, servers, energy systems, and aerospace applications. Whether you require stamped, CNC-machined, or extruded flat tube solutions, our engineering team delivers precision, efficiency, and reliability—at scale.

👉 Visit tongyucooler.com to explore our full portfolio of liquid cold plates and discover how Tongyu can support your thermal design challenges.

Linda / sales director

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