• The Technology

    Promethient’s Thermavance™ system allows for the cooling and heating of a person via direct thermal conduction. Heat is pumped from the person, cooling them, or heat is pumped to the person, warming them. Thermavance is a patented system that was developed by Charles Cauchy, an internationally recognized expert in thermoelectric device design, manufacturing and applications. Thermavance combines solid state heat pumping provided by a thermoelectric device and couples it with thermally conductive, flexible, and lightweight graphene.



  • Thermoelectric Devices and the Peltier Effect

    Solid state heat pumping is accomplished with a specialized semiconductor called a thermoelectric device, or “TED.” TED’s use the flow of electrons to create the Peltier Effect within the semiconductor. The Peltier Effect is created at the junction of P and N type semiconductor elements that are laminated between two ceramic plates. With the application of a voltage and the flow of current, one plate will heat and the opposing plate will cool. When the polarity of the applied voltage is reversed, the heat flow will reverse.


  • Graphene Nanotechnology

    To transfer heat to and from the thermoelectric device, Thermavance uses graphene as a thermal conduit. Graphene is comprised entirely of carbon characterized by a molecular structure featuring a flat layer of carbon atoms. Graphene exhibits a high level of thermal conductivity that is greater than that of copper. Moreover, graphene is lightweight and flexible facilitating its use in surfaces that must be flexible and able to conform to the human body.


In 2010, the Nobel Prize for Physics was awarded to the discoverers of graphene. The Nobel committee described the discovery: “As a conductor of heat, graphene outperforms all other known materials. It is almost completely transparent, yet so dense that not even helium, the smallest gas atom, can pass through it. Carbon, the basis of all known life on earth, has surprised us once again.”

–Swedish Academy of Science


Apply this technology to a wide range of industries and environments