Hollow Fibers Adjustment for Heat Exchangers

Hollow Fibers Adjustment for Heat Exchangers

Currently, copper, aluminum or steel are commonly used for the construction of heat exchangers, which makes them heavy and expensive. Polymer properties differ significantly from the properties of metals and the use of polymers as a construction material can reduce these drawbacks in such applications. The low density, excellent chemical resistance, and smooth surface coupled with their environmental attractiveness are the main advantages of polymers. We offer several ways to adjust the polymeric hollow fibers for higher efficiency of these exchangers.

Description of the Technology

In the production of polymeric hollow fibers heat exchangers is the question of connection of the fibers for inlet and outlet. One way of fibers connection is making of the flange at the ends of fiber bundle by filling their ends with a solidifying filling compound. The process is described in more detail in patent no. 304270. It is possible to modify variously the method of filling. For example during solidification the level of the filling compound is reduced to forming conical risers on the fibers (see patent number 304191).

According to the patent no. 304192 there can be achieved of the extended ends of the hollow fibers of the flange. The fiber ends are blended off and put into a mold filled with a filling compound. The solidification of the filling compound generates heat. At the start of the filling compound solidification, excessive pressure, being generated inside fibers causes bulging of the heated, heat-plasticized fiber in a section inside the filling compound to forming flares at the ends of the fibers.

The bundle of hollow fibers with maintained horizontal pitch is possible to create using the device described in patent no. 304177. The fiber is wound onto the device using distance lamellas, which are situated between layers of fibers. After making of the bundle fibers are clamped and filled up with a solidifying sealing compound for the flange production.

Distribution of fibers is also important for the heat exchanger efficiency. It can be affected by surface finish of the fiber. When fibers at the bundle are touching each other, then heat transfer medium cannot flow between them. So it is better to use curling of fibers which make different distances between fibers and increase the heat transfer area. Procedure for the curling is described in patent application no. 2014-729.

Another way for the increasing of the efficiency is roughening of the fiber, which achieves higher adhesion. Method of production such bundle is described in patents no. 304206 and no. 305208.

Main Advantages

  • Higher efficiency
  • Lower cost and lighter heat exchangers in comparison to conventional heat exchangers

Intellectual Property Status

  • 6 Czech patents granted
  • 1 patent application

Desired Business Relationship

We are offering a license and an opportunity for contractual research collaboration.


Ing. Jana Ondroušková, Ph.D., Technology Transfer Office, This email address is being protected from spambots. You need JavaScript enabled to view it., +420 541 144 225

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