Heat-Pipes

COFAN’S HEAT PIPES ARE SUPERCONDUCTORS WITH EXTRAORDINARY HEAT TRANSFER CAPACITY.

Features Included:

High conductivity (5,000 watts/meter·K to 200,000 watts/meter·K)
Energy-efficient
Light weight
Low cost
Flexibility of many different size and shape options
100% Inspection of all heat pipes, before and after bending
Passed stringent heat transfer tests to reach a minimum temperature gradient within a minimal time period (Delta T < 4 degrees C, time period ~ 7 seconds)
Longest heat pipe on the market, all the way up to 4700 mm

What Are Heat Pipes?

A heat pipe is composed of a vacuum-tightened vessel, wick structure, and some amount of working fluid. As heat is inputted at the evaporator, the fluid vaporizes, creating a pressure gradient. This pressure gradient pushes the vapor to flow along the pipe to the cooler section where it condenses, giving up its latent heat of vaporization. The working fluid is then returned to the evaporator by capillary forces developed in the wick structure or by gravity.

Main components:

Container
High strength, high thermal conductivity
Working fluid
High latent heat, high thermal conductivity
Wick/capillary structure
State-of-the-art copper powder sintering for maximum performance
Maintains effective capillary action when bent or used against gravity

Heat is absorbed from the source through vaporization and released at a sink through condensation. The vapor travels from source to sink through the central channel, while the liquid travels from sink to source through the porous wick.

The rapid growth of the electronics and the personal computer industries have introduced challenging heat dissipation problems. Heat pipes effectively transport heat with minimal drops in temperature.

Typical Applications

Laptop computers
High-performance processors (CPU, GPU)
Aerospace; spacecraft temperature equalization, component cooling
Constrained geometries
Low maintenance/high reliability applications
Noise-sensitive environments where heat can be dissipated to a larger, remote heat sink
Stagnation regions where airflow is poor
Limited electrical consumption
Passive solution to conserve battery power

Wick structure comparison

Heat pipes in stock

heat pipe working fluid

How to select a working fluid:

High surface tension – generates high capillary force and resists environment.
High Vapor pressure – reduces vapor velocity.
High latent heat – transfers more heat with less fluid.
High thermal conductivity – lower ΔT and reduces nucleate boiling at the wick/wall interface.
Low vapor viscosity – increase fluid flow capacity.