添加剂对喷雾冷板换热效果影响的实验研究

Experimental study on the effect of additives on the heat transfer performance of spray cold plate

喷雾冷板结构紧凑,换热效率高,能满足多热源高热通量的散热要求,被认为是解决下一代芯片散热的可靠手段。本文提出采用表面活性剂来强化喷雾冷板换热效果,并对不同种类和浓度的添加剂作用下喷雾冷板的传热性能进行系统的实验研究。研究发现,在3种添加剂中十二烷基硫酸钠(SDS)可以显著提升喷雾冷板的换热性能,在最佳浓度200ppm时使喷雾冷板的换热系数提高了19.8%,正辛醇和吐温20的添加均降低了多喷嘴喷雾冷板的换热性能。此外,通过量纲分析并结合实验数据,得出了添加剂作用下的喷雾冷板无量纲传热关联式,最大误差分别为2.1%、2.8%和5.4%。这一发现为喷雾冷板的提升改进提供了理论分析和基础。

The spray cold plate has a compact structure and high-efficiency heat exchange,which can meet the requirements of high heat flux dissipation of multiple heat sources,and is a reliable means to solve the heat dissipation of the next generation of chips.This paper proposes to use surfactants to enhance the heat transfer of the spray cold plate,and conduct a systematic experimental study on the heat transfer performance of the spray cold plate under different types and concentrations of additives.It was found that among the three surfactants,sodium dodecyl sulfate(SDS)can improve the heat transfer performance of the spray cold plate,and at the optimal concentration of 200 ppm,the heat transfer coefficient of the spray cold plate was increased significantly by 19.8%.Both the n-octanol-distilled water and Tween 20-distilled water can reduce the heat transfer performance of the cold plate using multi nozzles.In addition,based on the experimental data,the dimensionless heat transfers correlations for the spray cold plate using additives were conducted,and the maximum errors of dimensionless correlations for using additives were 2.1%,2.8%,and 5.4%respectively.This discovery provides a theoretical analysis and basis for the improvement of spray cold plates.