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Woven wire gas-to-liquid heat exchanger

 
: Fugmann, H.; Tahir, A.J.; Schnabel, L.

:
Fulltext urn:nbn:de:0011-n-3790973 (941 KByte PDF)
MD5 Fingerprint: 2034f49860f0274ef0e826dfc2b089da
Created on: 15.3.2016


Chaouki, J. ; International Academy of Science, Engineering and Technology -IASET-:
2nd International Conference on Heat Transfer and Fluid Flow, HTFF 2015. Online resource : Held at World Congress on Mechanical, Chemical, and Material Engineering (MCM 2015), July 20 - 21, 2015, in Barcelona, Spain
Ottawa: Avestia Publishing, 2015
Paper 314, 9 pp.
International Conference on Heat Transfer and Fluid Flow (HTTF) <2, 2015, Barcelona>
World Congress on Mechanical, Chemical, and Material Engineering (MCM) <2015, Barcelona>
English
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Thermische Anlagen und Gebäudetechnik; Energieeffiziente Gebäude; Wärmeübertragung in gebäudetechnischen Anlagen; transfer; heat exchanger; structures

Abstract
Gas-to-liquid heat exchangers lack in an adequate heat transfer coefficient on the gas side due to low convective heat transfer into the gas. Enhancing the heat transfer mechanism by increasing the surface area yields an improved heat transfer. Woven wire heat exchangers allow enlarging heat transfer surface area, decreasing material usage and the flexibility of different geometrical dimensions with the drawback of an increasing pressure drop. A further advantage of woven capillary-tube-and-wire structures is the possibility to combine the process of production of the mesh with contacting it to a tube. However studying heat transfer and hydraulics of woven capillary-tube-and-wire structures in experimental set-ups shows barriers in achieving good connection between wires and capillary tubes in first samplings. A medium heat transfer coefficient of 110 W/m²K for air velocities of 2 m/s with water as second fluid and stainless steel as solid structure can be achieved. Numerical simulations can reproduce the measurements and extended simulations of the same geometry, with less heat resistance between wires and tubes, yield a heat transfer coefficient of 330 W/m²K for a solid structure of 300 W/mK, showing the potential for wire structures as heat exchanger enhancer.

: http://publica.fraunhofer.de/documents/N-379097.html