Flow Boiling Heat Transfer Performance Comparison of Skived Straight and CNC Diverging Microchannels Heat Sinks

SUMMARYFlow reversal and partial dryout are the most severe issue while applying flow boiling in microchannel heat sinks. Some studies have been conducted to resolve this flow reversal problem. One of the most promising design is the diverging channel. This study compared the flow boiling heat trans...

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Bibliographic Details
Main Authors: Lin, Fang-Chou, Liu, Chien-Fu, Yang, Ming-Tsung, Lee, Sung-Wei, Hsu, Cheng-Hung, Sung, Kuan-Fu, Yang, Chien-Yuh
Format: Conference Proceeding
Language:English
Subjects:
Commercialization
Heat sinks
Heat transfer
Microchannels
Resistance heating
Thermal resistance
Online Access:Request full text
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Summary:SUMMARYFlow reversal and partial dryout are the most severe issue while applying flow boiling in microchannel heat sinks. Some studies have been conducted to resolve this flow reversal problem. One of the most promising design is the diverging channel. This study compared the flow boiling heat transfer performance of refrigerant R-245fa in a 2-pass diverging microchannel heat sink and in a commercialized skived microchannel heat sink. The test results showed that the maximum thermal resistance of the skived straight channel heat sink are from 28% lower to 4.2% higher than that of diverging channel heat sink. The flow pressure drops in the skived channel heat sink are from 30% to 48% higher than those in diverging channel heat sink.
ISSN:2577-1000
DOI:10.23919/SEMI-THERM59981.2023.10267893