With the support of the Federal Ministry of Economics and Technology and Euronorm, Schumacher Verfahrenstechnik has developed a new, innovative tube cooling system for the energy-saving pre-cooling of freshly milked raw milk. This tube cooler is based on two technologies which are used in process engineering and in which Schumacher Verfahrenstechnik GmbH has many years of experience. One is the principle of a counterflow heat exchanger embedded in a double pipe system and the other is the technology of static mixing. Static mixers are used in process engineering wherever a wide variety of media need to be mixed quickly, cost-effectively and economically in a continuous process. The energy required for mixing is extracted from the medium by a pressure loss and converted into kinetic energy. The art of designing and calculating static mixers lies in achieving the highest possible mixing quality with the lowest possible pressure loss and gentle handling of the product. Mixing elements with different geometries for different media and aggregate states are available for this purpose. Static mixers have also been used in heat exchangers for some time now, although this usually involves highly viscous media with single-digit Reynolds numbers that only flow laminarly and therefore only have minimal interface contact with the cooling tube wall, such as polymer melts, glucose compounds, pastes or syrups etc.. The ever increasing energy prices gave us the idea of developing a tube cooler or raw milk cooler for the dairy industry which pays for itself relatively quickly and can be easily retrofitted into an existing milk cooling system.