With the support of the German Federal Ministry of Economics and Technology and Euronorm, Schumacher Verfahrenstechnik has developed a new innovative tube cooling system for 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 are to be mixed quickly, cost-effectively and economically in a continuous process. Here, 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 a wide variety of geometries for different media and aggregate states are available for this purpose. Static mixers have also been used in heat exchangers for a long time, but these are usually used for highly viscous media with single-digit Reynolds numbers that flow only laminarly and thus have only minimal interfacial 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 to develop a tube cooler or raw milk cooler for the dairy industry, which amortizes relatively quickly and can be easily retrofitted into an existing milk cooling system.

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