High-Flux Thermal Management with Supercritical Fluids
High-Flux Thermal Management with Supercritical Fluids
复制标题
超临界流体的高通量热管理
DOI：
10.1115/1.4034053
复制
发表时间：
2016
影响因子：
--
通讯作者：
A. Rattner
中科院分区：
文献类型：
--
作者：
B. Fronk;A. Rattner
探索了一种新的热管理方法，该方法使用超临界二氧化碳（sCO 2）作为工作流体来管理电子冷却应用中的极端热通量。在准临界区域，sCO 2具有极高的体积热容，这可以使操作具有低泵送要求，并且没有两相临界热通量（CHF）和流动不稳定性的可能性。一个代表性的微通道散热器的模型进行评估与单相液态水和FC-72，两相沸腾R-134 a，和sCO 2。对于一个固定的泵浦功率，sCO 2被发现产生较低的散热器壁温比液体冷却剂。超临界热管理系统的实际工程挑战进行了讨论，包括预测传热模型的限制，狭窄的工作温度范围，高工作压力，和泵的设计标准。基于这些发现，sCO 2是一种很有前途的候选工作流体，用于冷却高热流电子器件，但在实现实际系统之前，还需要进行额外的热传输研究和工程设计。
A novel thermal management approach is explored, which uses supercritical carbon dioxide (sCO2) as a working fluid to manage extreme heat fluxes in electronics cooling applications. In the pseudocritical region, sCO2has extremely high volumetric thermal capacity, which can enable operation with low pumping requirements, and without the potential for two-phase critical heat flux (CHF) and flow instabilities. A model of a representative microchannel heat sink is evaluated with single-phase liquid water and FC-72, two-phase boiling R-134a, and sCO2. For a fixed pumping power, sCO2is found to yield lower heat-sink wall temperatures than liquid coolants. Practical engineering challenges for supercritical thermal management systems are discussed, including the limits of predictive heat transfer models, narrow operating temperature ranges, high working pressures, and pump design criteria. Based on these findings, sCO2is a promising candidate working fluid for cooling high heat flux electronics, but additional thermal transport research and engineering are needed before practical systems can be realized.