Heat Pipes are a reliable method for transporting heat quickly and effectively. By utilizing the high heat capacity of two-phase water cooling in a versatile copper package, copper-water heat pipes are a popular component in a wide variety of thermal management solutions across broad range of industries.
Boyd Corporation has pioneered heat pipe development and solutions. We have set the world’s standard for commercial application of this passive, highly conductive two-phase heat transfer device for 50 years. Boyd heat pipes are designed for high heat load or gravity sensitive applications where reliability and long life are critical.
Using water as the internal working fluid, the Boyd copper-water heat pipe smoothly moves heat from the heat source to where the heat can be managed more effectively through dissipation to air, liquid, or radiated to space. Ductile copper walls and wick enable bending or flattening to meet an application’s thermal and geometric requirements. This can be used to reduce overall height, increase surface contact, or route heat pipes around keep-out areas like mounting hardware.
Copper-water heat pipes are often integrated into thermal management assemblies to improve effective conductivity and efficiency, improving overall system performance. By using epoxy, solder, or a mechanical interference fit, Boyd’s copper-water heat pipes can be integrated into other components to create heat transport heat pipe assemblies or heat spreading heat pipe assemblies that are more customized to your specific application.
For rapid thermal modeling and comparison of multiple heat sink constructions please try Aavid Genie our heat sink design tool.
Copper Water Heat Pipes
Heat Pipe Line Card
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Copper-Water Heat Pipe Parameters
3, 4,5, 6, 8, 9.5 mm
75 - 350 mm *
Heat Pipe Material
High-Purity Copper **
Freeze Thaw Range
-55° to 180°C-200°C to 250°C
Sintered Copper Powder Axially Grooved Wire Mesh Screen
Maximum Heat Flux
Up to 20 years
* Longer distances are possible with axially grooved heat pipes or with technologies like thermosiophons or loop heat pipes. ** Other materials and working fluids available for custom applications, especially for cryogenic heat pipes or high temperature heat pipes
Copper-water heat pipes are available with several wick types that offer benefits geared towards application-specific challenges. The wick is the structure that creates the capillary action for working fluid to return to the evaporator after it condenses and releases heat at cooler regions. Without the wick, a heat pipe is more commonly known as a thermosiphon and relies solely on gravity and buoyancy to transport heat.
Sintered Metal Powder Wick heat pipes are the commercially most common heat pipe wick structure. Standard Aavid copper-water heat pipes use a sintered wick which operates against gravity and can withstand numerous freeze-thaw cycles and temperatures ranging from -55°C to 180°C.
Aavid’s axially grooved wick enables thermal transfer of high heat loads over distances over 3 meters and has a wider freeze-thaw range of -200°C to 250°C compared to sintered wick heat pipes. Axially grooved heat pipes also have reduced manufacturing costs compared to other wick types. Axially grooved heat pipes can also be used to create Constant Conductance Heat Pipes (CCHPs).
A mesh wick is composed of a metal wire woven into a screen and has some tolerance for variable gravity orientations. Screen mesh wicks can also be used to create Variable Conductance Heat Pipes (VCHPs) that are designed for more consistent temperature control.
Sintered Powder Wick
+90° to -90° Gravity Insensitive
High - Over to 15 W/cm2
+90° to 0°
Low - Up to 10 W/cm2
+90° to -5°
Medium - Up to 15 W/cm2
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