INDUSTRY COMPONENT

Heat Pipes

Heat pipes are passive heat transfer devices that efficiently transport thermal energy through phase change of a working fluid, commonly used in cooling solutions for electronics and machinery.

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Component Specifications

Definition
A heat pipe is a sealed, vacuum-tight device consisting of a wick structure lining the inner wall and a small amount of working fluid. It operates on the principles of capillary action and phase change: heat applied at the evaporator section vaporizes the fluid, which travels to the condenser section where it condenses, releasing latent heat. The condensed liquid returns to the evaporator via the wick structure, creating a continuous cycle for highly efficient heat transfer with minimal temperature gradient.
Working Principle
Heat pipes utilize the latent heat of vaporization and condensation of a working fluid (e.g., water, ammonia, or refrigerants) within a sealed, vacuum environment. Heat input at the evaporator section causes the fluid to vaporize, creating a pressure gradient that drives vapor to the condenser section. There, heat is dissipated, causing condensation. Capillary action in the wick structure (e.g., sintered powder, grooves, or mesh) pumps the condensed liquid back to the evaporator, enabling passive, high-conductivity heat transport.
Materials
Common materials include copper or aluminum for the outer casing (for high thermal conductivity and corrosion resistance), with wick structures of sintered copper powder, grooves, or mesh. Working fluids vary by application: water for 0-150°C, ammonia for -60 to 100°C, or refrigerants for specific ranges. Compatibility between casing, wick, and fluid is critical to prevent corrosion or degradation.
Technical Parameters
  • Length 50 mm to 500 mm
  • Diameter 3 mm to 25 mm
  • Bending Radius ≥ 3x diameter
  • Max Heat Transport 50 W to 500 W
  • Thermal Conductivity 5,000 to 200,000 W/m·K (effective)
  • Orientation Sensitivity Performance varies with gravity; some designs are orientation-independent
  • Operating Temperature Range -60°C to 300°C (fluid-dependent)
Standards
ISO 19467:2017, DIN EN 13941, ASTM E1530

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Heat Pipes.

heat pipe thermal management cooling solution heat transfer phase change wick structure passive cooling electronics cooling industrial cooling Heat Pipes Heat Pipes in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Cooling Solution (Heatsink/Fan)

Thermal management system for dissipating heat from GPU components

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Engineering Analysis

Risks & Mitigation
  • Leakage of working fluid leading to loss of functionality
  • Wick structure clogging or degradation over time
  • Incompatibility between materials causing corrosion
  • Performance reduction in non-optimal orientations
  • Overheating if heat input exceeds design limits
FMEA Triads
Trigger: Mechanical damage or corrosion
Failure: Casing breach and fluid leakage
Mitigation: Use robust casing materials (e.g., copper with nickel plating), implement protective housings, and conduct regular inspections for damage.
Trigger: High-temperature operation beyond fluid limits
Failure: Fluid decomposition or pressure buildup
Mitigation: Select appropriate working fluid for the temperature range, incorporate temperature sensors, and design with safety margins.
Trigger: Improper installation or bending
Failure: Wick structure damage or reduced capillary action
Mitigation: Follow manufacturer guidelines for bending radius and orientation, use pre-bent designs if needed, and train personnel on handling procedures.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Dimensional tolerances per ISO 2768-m, thermal performance within ±10% of rated conductivity under specified conditions
Test Method
Thermal performance tested per ASTM E1530 (guarded heat flow meter method) or ISO 19467, leak testing via helium mass spectrometry, and material analysis per relevant ASTM standards.

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

How do heat pipes compare to solid metal heat spreaders?

Heat pipes offer significantly higher effective thermal conductivity (up to 200,000 W/m·K vs. ~400 W/m·K for copper) due to phase change, enabling efficient heat transport over longer distances with minimal temperature drop, making them ideal for compact or high-heat applications.

What factors affect heat pipe performance?

Key factors include working fluid selection (based on temperature range), wick structure design (affects capillary pumping and orientation sensitivity), casing material, vacuum integrity, and operating orientation (gravity-assisted or against gravity).

Are heat pipes maintenance-free?

Yes, heat pipes are sealed and passive, requiring no maintenance under normal conditions. However, they can fail due to leakage, wick degradation, or fluid depletion, often requiring replacement.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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