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Wire Structure Heat Exchangers. New Designs for Efficient Heat Transfer

: Fugmann, H.; Laurenz, E.; Schnabel, L.

Fulltext urn:nbn:de:0011-n-4804893 (5.8 MByte PDF)
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Created on: 10.8.2018

Energies 10 (2017), No.9, Art. 1341, 17 pp.
ISSN: 1996-1073
Bundesministerium für Bildung und Forschung BMBF
Journal Article, Electronic Publication
Fraunhofer ISE ()
Thermische Systeme und Gebäudetechnik; Wärme- und Kältetechnik; air conditioning; design; energy efficiency; heat exchanger; performance figures; Gebäudeenergietechnik; Wärme- und Kälteversorgung; Materialien und Komponenten für Wärmetransformation

Enhancing the heat transfer mechanism by increasing the heat exchanger surface area is a standard way to overcome low heat transfer on the gas side of heat exchangers. Different geometrical shapes, for example, plain, wavy, or interrupted fin geometries for plate-fin or tube-fin heat exchangers, are used for this task. Wire structures with dimensions in the submillimeter range are already used in regenerators for their heat capacity, but are rarely used in recuperators as heat transfer enhancers. New textile developments enable the fabrication of adapted structures with irregular grid sizes, and purpose-built for heat exchanger application. These wire structures allow for enlarging the heat transfer surface area, decreasing material utilization, and enabling flexibility of different geometrical dimensions. Possibilities for manufacturing and design selection are studied in the project, EffiMet, and thereafter at Fraunhofer ISE for the implementation of highly efficient heat exchanger geometries based on wire structures.