Heat transfer characteristics and flow visualization during flow boiling of acetone in semi-open multi-microchannels

XIA, Guodong, CHENG, Yue, CHENG, Lixin and LI, Yifan (2018). Heat transfer characteristics and flow visualization during flow boiling of acetone in semi-open multi-microchannels. Heat Transfer Engineering, 1-14.

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Official URL: https://www.tandfonline.com/doi/full/10.1080/01457...
Link to published version:: https://doi.org/10.1080/01457632.2018.1470296


Experimental results of flow boiling characteristics and flow patterns with acetone in two different microchannel heat sinks are presented in this paper. A semi-open microchannel heat sink and a straight microchannel heat sink with 19 parallel microchannels each were designed and tested. The semi-open microchannels have a channel width of 0.8 mm, fin width of 0.4 mm, and pedestal height of 0.2 mm and the straight microchannels have a rectangular cross section of 0.8 mm × 1 mm. The experimental heat fluxes ranged from 0 to 90 kW/m2, vapor quality ranged from 0.05 to 0.5, mass fluxes ranged from 4.34 to 15.62 kg/m2·s and the inlet temperatures were 20 and 30°C, respectively. Compared to those in the straight microchannels, flow boiling heat transfer coefficients can be improved by up to 36.2%. Furthermore, flow patterns were observed with a speed video camera. The flow boiling heat transfer mechanisms are analyzed according to the observed flow patterns

Item Type: Article
Additional Information: ** From Crossref via Jisc Publications Router.
Uncontrolled Keywords: Mechanical Engineering, Condensed Matter Physics, Fluid Flow and Transfer Processes
Departments: Faculty of Science, Technology and Arts > Department of Engineering and Mathematics
Identification Number: https://doi.org/10.1080/01457632.2018.1470296
SWORD Depositor: Margaret Boot
Depositing User: Margaret Boot
Date Deposited: 11 May 2018 11:43
Last Modified: 16 Nov 2018 13:25
URI: http://shura.shu.ac.uk/id/eprint/21057

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