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Titolo:
Forced convection boiling in a microchannel heat sink
Autore:
Jiang, LA; Wong, M; Zohar, Y;
Indirizzi:
Hong Kong Univ Sci & Technol, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China Hong Kong Univ Sci & Technol Hong Kong Hong Kong Peoples R China R China
Titolo Testata:
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
fascicolo: 1, volume: 10, anno: 2001,
pagine: 80 - 87
SICI:
1057-7157(200103)10:1<80:FCBIAM>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
TEMPERATURE SENSORS; PERFORMANCE;
Keywords:
flow visualization; forced convection boding; microchannel heat sink; phase change;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Jiang, LA Hong Kong Univ Sci & Technol, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China Hong Kong Univ Sci & Technol Hong Kong Hong Kong Peoples R China
Citazione:
L.A. Jiang et al., "Forced convection boiling in a microchannel heat sink", J MICROEL S, 10(1), 2001, pp. 80-87

Abstract

Micromachining technology was utilized to fabricate a transparent microchannel heat-sink system by bonding glass to a silicon wafer. The micro heat sink consisted of a microchannel array, a heater, and a temperature sensor array. This integrated microsystem allowed simultaneous qualitative visualizations of the flow pattern within the microchannels and quantitative measurements of temperature distributions, flow rates, and input power levels. Boiling curves of temperature as a function of the input power were established. No boiling plateau was observed in the boding curves, consistent with our previously reported data but different from results reported for macrochannel heat sinks. Three stable boiling modes, depending on the input power level, have been distinguished from the flow patterns, Local nucleation boiling was observed in microchannels with a hydraulic diameter as small as 26mum at the lower input power range. At the higher input power range, a stable annular flow was the dominant boiling mode. Bubbly flow commonly observed in macrochannels, could not be developed in the present microchannels. Consequently, no bailing plateau was detected in the boiling curves.

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Documento generato il 24/01/20 alle ore 13:00:31