Nanowires for enhanced boiling heat transfer

Renkun Chen, Ming-Chang Lu, Vinod Srinivasan, Zhijie Wang, Hyung Hee Cho, Arun Majumdar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

516 Scopus citations

Abstract

Boiling is a common mechanism for liquid - vapor phase transition and is widely exploited in power generation and refrigeration devices and systems. The efficacy of boiling heat transfer is characterized by two parameters: (a) heat transfer coefficient (HTC) or the thermal conductance; (b) the critical heat flux (CHF) limit that demarcates the transition from high HTC to very low HTC. While increasing the CHF and the HTC has significant impact on system-level energy efficiency, safety, and cost, their values for water and other heat transfer fluids have essentially remained unchanged for many decades. Here we report that the high surface tension forces offered by liquids in nanowire arrays made of Si and Cu can be exploited to increase both the CHF and the HTC by more than 100%.

Original languageEnglish
Pages (from-to)548-553
Number of pages6
JournalNano Letters
Volume9
Issue number2
DOIs
StatePublished - 11 Feb 2009

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