Enhancing Flow Boiling Heat Transfer in Microchannels for Thermal Management with Monolithically-Integrated Silicon Nanowires
Enhancing Flow Boiling Heat Transfer in Microchannels for Thermal Management with Monolithically-Integrated Silicon Nanowires
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DOI：
10.1021/nl300049f
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发表时间：
2012-07-01
期刊：
影响因子：
10.8
通讯作者：
Yang, Ronggui
中科院分区：
文献类型：
--
作者：
Li, D.;Wu, G. S.;Yang, Ronggui
热管理已成为高热流电子和能源系统的关键问题。集成两相微通道液体冷却技术被认为是一种很有前途的解决方案，但在流动不稳定性方面存在很大的挑战。在这项工作中，硅纳米线原位合成的平行硅微通道阵列的第一次，以抑制流动不稳定性，并增加流动沸腾传热。实验结果表明，多孔陶瓷涂层微通道热沉的流动沸腾传热性能得到显著提高，如泡核沸腾的早期发生、流动振荡的延迟发生、温度和压力降的振荡幅度受到抑制以及传热系数的提高。
Thermal management has become a critical issue for high heat flux electronics and energy systems. Integrated two-phase microchannel liquid-cooling technology has been envisioned as a promising solution, but with great challenges in flow instability. In this work, silicon nanowires were synthesized in situ in parallel silicon microchannel arrays for the first time to suppress the flow instability and to augment flow boiling heat transfer. Significant enhancement in flow boiling heat transfer performance was demonstrated for the nanowire-coated microchannel heat sink, such as an early onset of nucleate boiling, a delayed onset of flow oscillation, suppressed oscillating amplitudes of temperature and pressure drop, and an increased heat transfer coefficient.