A Critical Review on Geometric Improvements for Heat Transfer Augmentation of Microchannels
A Critical Review on Geometric Improvements for Heat Transfer Augmentation of Microchannels
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DOI：
10.3390/en15249474
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发表时间：
2022-12
期刊：
影响因子：
3.2
通讯作者：
Hao Yu;Tongling Li;Xiaoxing Zeng;T. He;Ning Mao
中科院分区：
文献类型：
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作者：
Hao Yu;Tongling Li;Xiaoxing Zeng;T. He;Ning Mao
随着微器件在建筑工程、航空航天工业、电子器件、核能等领域的应用，高热流密度的耗散已成为一个亟待解决的问题。微通道散热器由于其高传热和小尺寸的特点，已成为微器件热管理和设备增强的有效手段。然而，由于微型器件对热负荷、温度控制和节能的要求越来越高，高效率的热交换器，特别是微通道越来越受到人们的重视。为了进一步提高微通道的性能，优化通道的几何形状已成为一项非常重要的被动技术，以有效地增强微通道散热器的传热能力。因此，本文对前人研究的微通道几何特性进行了回顾、分类和总结。综述了微通道的几何特征和结构设计，以加强传热和压降的效果。此外，还提出了沸腾换热与微通道流动几何特性的关系，并对微通道几何设计的未来研究方向进行了讨论。
With the application of microdevices in the building engineering, aerospace industry, electronic devices, nuclear energy, and so on, the dissipation of high heat flux has become an urgent problem to be solved. Microchannel heat sinks have become an effective means of thermal management for microdevices and enhancements for equipment due to their higher heat transfer and small scale. However, because of the increasing requirements of microdevices for thermal load and temperature control and energy savings, high efficiency heat exchangers, especially microchannels are receiving more and more attention. To further improve the performance of microchannels, optimizing the channel geometry has become a very important passive technology to effectively enhance the heat transfer of the microchannel heat sink. Therefore, in this paper, the microchannel geometry characteristics of previous studies are reviewed, classified and summarized. The review is mainly focused on microchannel geometry features and structural design to strengthen the effect of heat transfer and pressure drop. In addition, the correlation between boiling heat transfer and geometric characteristics of microchannel flow is also presented, and the future research direction of microchannel geometry design is discussed.