Heat Pipe Assemblies

ACT designs and manufactures heat pipes in-house.

Copper/water heat pipes are made of copper, use water as a working fluid and typically operate in the temperature range of 20 to 150°C. ACT manufactures copper/water heat pipes into two basic geometries: Tubular Heat Pipes and Planar Heat Pipes. The tubular heat pipes typically have outer diameters from 1/16″ (1.5mm) to 1.5″ (38mm). Custom diameters can be manufactured per customer requirements. The planar heat pipes are also called vapor chambers which are used as heat spreaders. Below are photos of examples of copper/water heat pipes manufactured at ACT.

Heat Pipe Heat Sink

Heat Pipe Heat Sink

Copper/water heat pipes are often combined with other components to form heat transfer assemblies. Some examples are shown below, including:

  • Heat pipe heat sinks for electronics and energy conversion device cooling
  • Embedded heat pipe heat spreaders for electronics cooling
  • Heat pipe heat exchangers for electronics enclosure cooling, waste heat recovery and chemical process temperature control

Current custom designs and options include:

  • Outer diameter (OD): From 1/16″ (1.5mm) to 1.5″ (38mm)
  • Cross section geometry: round, rectangular or flattened
  • Length: any, depending on application
  • Geometry: straight or multiple bends (certain bend radius limits apply)
  • Bonding of heat pipes to assembly: mechanical, epoxy or soldering
  • Heat pipe surface coating: nickel or tin

All of ACT’s copper/water heat pipes are designed to survive numerous freeze/thaw cycles without any degradation as required by many outdoor applications.