Integrating microchannel flow boiling heat transfer with nanofluids is an effective method for cooling electronic devices. However, traditional methods have significant limitations in achieving facile synthesis of nanofluids with desirable properties. In this study, we propose a straightforward synthesis strategy using microfluidic reactors, which enables continuous and high-throughout synthesis of AlO nanofluids with high purity and long-term stability. These nanofluids were found to enhance boiling heat transfer performance by delaying bubbles coalescence, increasing surface nucleation sites, improving the nucleation rate, and enhancing wettability by observation of the bubble behavior. Specifically, the critical heat flux (CHF) and corresponding heat transfer coefficient (HTC) are increased by a maximum of 32 % and 26 %, respectively, with negligible change in pressure drop. Moreover, the heat transfer performance deteriorates with increasing concentration of alumina nanofluids. These findings not only provide guidance of microchannel flow boiling with nanofluids, but also present valuable insights for the application of nanofluids in two-phase cooling systems for electronic devices.

中文翻译：

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Al2O3 纳米流体的微流控合成用于电子器件高效相变沸腾传热增强

将微通道流动沸腾传热与纳米流体相结合是冷却电子设备的有效方法。然而，传统方法在实现具有所需性能的纳米流体的简便合成方面具有显着的局限性。在这项研究中，我们提出了一种使用微流控反应器的简单合成策略，能够连续、高通量地合成高纯度和长期稳定性的Al2O纳米流体。通过观察气泡行为，发现这些纳米流体通过延迟气泡聚结、增加表面成核位点、提高成核速率和增强润湿性来增强沸腾传热性能。具体来说，临界热通量 (CHF) 和相应的传热系数 (HTC) 分别增加最多 32% 和 26%，而压降变化可以忽略不计。此外，传热性能随着氧化铝纳米流体浓度的增加而恶化。这些发现不仅为纳米流体的微通道流动沸腾提供了指导，而且为纳米流体在电子设备两相冷却系统中的应用提供了宝贵的见解。