Open AccessThermographical study of geometry and phase change influence on PDMS Microchannel liquid cooling devices
Author(s) -
Pedro Pontes,
Luís Amaro Martins,
I. Gonçalves,
Ana Moita,
António Moreira
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2116/1/012050
Subject(s) - microchannel , refrigerant , materials science , thermography , boiling , heat transfer coefficient , heat flux , heat transfer , work (physics) , infrared , pressure drop , hydraulic diameter , mechanics , thermodynamics , optics , nanotechnology , heat exchanger , reynolds number , turbulence , physics
This work proposes a methodology in which high speed camera imaging is combined with infrared (IR) thermography to look at the effect of geometric parameters and boiling in the effectiveness of these coolers. PDMS microchannels were manufactured with 3 channel widths: 250, 500 and 750 µm . HFE7100 was used as the refrigerant. Pressure losses were significant for the thinnest geometry as clogging and flow reversal were observed. The dissipated heat flux, as measured by the IR camera was higher in the largest channels, due to the PDMS poor conductivity. Results obtained with HFE7100 were then compared with those obtained with water at single-phase flow. For the same geometry, HFE 7100 resulted in a higher heat transfer coefficient than water.