Flow boiling heat transfer in a microchannel heat sink is experimentally investigated. The microchannels considered are 275 μm wide and 636 μm deep, and the experiments are conducted at inlet water temperatures in the range of 66 to 95°C and mass fluxes of 341 to 936 kg/m2s. Convective boiling heat transfer coefficients are measured and compared to predictions from correlations proposed for larger channels. While an existing correlation was found to provide satisfactory prediction of the heat transfer coefficient in subcooled boiling in the microchannels, saturated boiling was not well predicted by the correlations for macrochannels. A new heat transfer model is developed to correlate the data in the saturated boiling regime. Good agreement with the experimental measurements indicates that this correlation is suitable for use in the design of two-phase microchannel heat sinks.
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ASME 2005 International Mechanical Engineering Congress and Exposition
November 5–11, 2005
Orlando, Florida, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4221-5
PROCEEDINGS PAPER
Flow Boiling in a Microchannel Heat Sink
Suresh V. Garimella
Suresh V. Garimella
Purdue University
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Dong Liu
Purdue University
Suresh V. Garimella
Purdue University
Paper No:
IMECE2005-79555, pp. 633-642; 10 pages
Published Online:
February 5, 2008
Citation
Liu, D, & Garimella, SV. "Flow Boiling in a Microchannel Heat Sink." Proceedings of the ASME 2005 International Mechanical Engineering Congress and Exposition. Heat Transfer, Part A. Orlando, Florida, USA. November 5–11, 2005. pp. 633-642. ASME. https://doi.org/10.1115/IMECE2005-79555
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