Pipe production with internal structures
Heat exchanger pipes with complex topographical internal structures
Exhibitors
Location
Hall 11, Stand B06
Description
The principle of the heat exchanger involves transferring heat from one medium to another. They do not come into direct contact with each other, but are guided past each other. As a rule, both liquid and gaseous fluids are passed through pipes. Heat is transferred via the pipe wall. In addition to heat exchangers, the principle is also used in boilers, heat accumulators or solar receivers, for example. If surface structures are incorporated into the inner wall of heat exchanger tubes, the flow behavior of the fluid can be influenced in such a way that the resulting turbulence increases heat transfer.
Researchers at KIT have developed a process combination for the production of tubes made of metallic materials with arbitrarily complex inner structures and seamless pressure-bearing outer walls. First, the desired surface structures are applied to sheet metal using cost-effective techniques such as punching, embossing or laser cutting. These are then formed into rings or shell segments and assembled into a tube inner shell. The material for the actual tube body in metal powder form is additively applied to the inner shell from the outside at very high speed using a cold gas spraying process. In contrast to other coating processes for metals, a dense and firmly adhering layer is formed on impact without prior melting or melting of the material. The result is a distortion-free pipe body.
The new manufacturing process enables the economical realization of internal pipe structures of any complexity through the use of mass production techniques with rational use of materials. Due to the higher heat transfer, pipe lengths and diameters can be reduced.
You can get an overview of this technology at KIT stand. More details can be exchanged individually with the responsible scientific employees of KIT after the industry fair.
Contact
Karlsruher Institut für Technologie (KIT)
- Kaiserstr. 12
- 76131 Karlsruhe
- Germany
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