Heat Pipes

Pure Efficiency

The heat pipe is a closed pipe in which the working fluid is present as a two-phase system during operation, namely in liquid and vapor/gas form. Heat pipes are used as highly efficient and compact heat exchangers in areas where very high heat flux densities must be guaranteed in the tightest spaces. The enormous efficiency of the heat pipes is mainly due to the evaporation and condensation process within the heat pipe.

The heat supply in the heating/evaporator zone leads to isothermal evaporation of the working medium. The working fluid then flows through the adiabatic transport zone into the cooling/condenser zone, where it condenses on the tube wall, releasing heat. The capillary structures typically attached to the inner tube wall of the heat pipe, in combination with the liquid, induce capillary forces, which enable passive return of the working medium to the evaporator zone. The return flow of the liquid phase is often supported by gravity if the heat pipes are inclined or laid vertically and the evaporator zone is below the condenser zone.

The choice of a suitable working medium naturally depends on the respective application and is therefore selected according to the desired temperature range of the heat transfer. In general, Alkali metals are used for applications in high-temperature processes. For the temperature range from 700 °C to 1000 °C, for example, sodium can be applied as a working fluid, while in the range from 400 °C to 700 °C potassium or cesium can be used as a heat transfer medium.

Products

Our heat pipe project is currently in the planning phase. Technical information and consulting is available in advance.

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