Originally Published MPMN March 2005
HOTLINETubing Offers Thermal Conductivity Times Three
A materials enhancement process enables a resin to triple the amount of heat transferred between
|HTTT offers high thermal conductivity while maintaining a level of stress crack resistance essential in heat exchanger applications.|
A supplier of fluoropolymer engineering and extrusion services has developed a new process to increase thermal conductivity in tubing. The process entails blending fluoropolymer resin with inert inorganic filler to enhance the ability of the natural resin to transfer heat between two liquids.
The resulting product, extruded HTTT high heat transfer tubing from Markel Corp. (Plymouth Meeting, MA), offers up to three times the thermal conductivity of the natural resin. Because the filler is inert and the flouropolymer matrix provides good dispersion, the tubing is suitable for engineers of heat exchange systems.
HTTT is designed to replace traditional graphite-based fluoropolymer tubing. This tubing has limited use due to adverse chemical reactions with some aggressive agents that are encountered in heat exchanger environments. HTTT eliminates this problem while increasing thermal conductivity and retaining all of the properties that make fluoropolymers a good choice in heat exchanger situations.
The tubing is available in two base resins, fluorinatedethylenepropylene and perfluoroalkoxy. A significant increase in the efficiency of heat trace wire insulation can be expected, according to the company.
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