Two-phase boiling in advanced microchannel heat sinks offers an efficient and attractive solution for heat dissipation of high-heat-flux devices. In this study, a type of reentrant copper microchannels was developed for heat sink cooling systems. It consisted of 14 parallel Ω-shaped reentrant copper microchannels with a hydraulic diameter of 781μm. Two-phase pressure drop characteristics were comprehensively accessed via flow boiling tests. Both deionized water and ethanol tests were conducted at inlet subcooling of 10°C and 40°C, mass fluxes of 125–300kg/m2·s, and a wide range of heat fluxes and vapor qualities. The effects of heat flux, mass flux, inlet subcoolings and coolants on the two-phase pressure drop were systematically explored. The results show that the two-phase pressure drop of reentrant copper microchannels generally increased with increasing heat fluxes and vapor qualities. The role of mass flux and inlet temperatures was dependent on the test coolant. The water tests presented smaller pressure drop than the ethanol ones. These results provide critical experimental information for the development of microchannel heat sink cooling systems, and are of considerable practical relevance.
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ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer
January 4–6, 2016
Biopolis, Singapore
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4965-1
PROCEEDINGS PAPER
On the Operational Parameters Effects on Two-Phase Pressure Drop Characteristics of Reentrant Copper Microchannels
Daxiang Deng,
Daxiang Deng
Xiamen University, Xiamen, China
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Qingsong Huang,
Qingsong Huang
Xiamen University, Xiamen, China
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Xiang Huang,
Xiang Huang
Zhejiang University of Technology, Hangzhou, China
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Yue Huang
Yue Huang
Xiamen University, Xiamen, China
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Daxiang Deng
Xiamen University, Xiamen, China
Qingsong Huang
Xiamen University, Xiamen, China
Yanlin Xie
Xiamen University, Xiamen, China
Wei Zhou
Xiamen University, Xiamen, China
Xiang Huang
Zhejiang University of Technology, Hangzhou, China
Yue Huang
Xiamen University, Xiamen, China
Paper No:
MNHMT2016-6514, V001T04A004; 8 pages
Published Online:
March 15, 2016
Citation
Deng, D, Huang, Q, Xie, Y, Zhou, W, Huang, X, & Huang, Y. "On the Operational Parameters Effects on Two-Phase Pressure Drop Characteristics of Reentrant Copper Microchannels." Proceedings of the ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. Volume 1: Micro/Nanofluidics and Lab-on-a-Chip; Nanofluids; Micro/Nanoscale Interfacial Transport Phenomena; Micro/Nanoscale Boiling and Condensation Heat Transfer; Micro/Nanoscale Thermal Radiation; Micro/Nanoscale Energy Devices and Systems. Biopolis, Singapore. January 4–6, 2016. V001T04A004. ASME. https://doi.org/10.1115/MNHMT2016-6514
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