一种适用于高热流密度芯片的微槽道冲击射流冷却系统

Micro-channel jet cooling system for high heat flux chips

设计了以水为工质的浸没式微槽道多喷嘴冲击射流冷却系统,并将其应用于高热流密度芯片散热。给出了冲击射流原理,详细介绍了实验装置和实验工况。实验结果表明,在相同喷射间距下,CPU表面平均温度随射流速度的增大而线性降低,CPU表面平均传热系数随射流速度的增大而线性增大;在相同的射流速度下,CPU表面平均温度和平均传热系数几乎不随喷射间距变化;在相同的射流流量下,喷嘴数量对冲击表面平均传热系数和温度没有显著影响。将该冲击射流冷却装置应用于数据中心空调系统,理论上可以全年不开启制冷机。

Designs a submerged micro-channel multi-nozzle jet cooling system with water as the working fluid and applies it to heat release of high heat flux chips. Presents the principle of impinging jet, the experimental device and experimental conditions in detail. The experimental results show that the average surface temperature of the CPU decreases linearly with the increase of the jet velocity at the same injection space, and the average surface coefficient of heat transfer of the CPU increases linearly with the increase of the jet velocity. At the same jet velocity, the average surface temperature and the average surface coefficient of heat transfer are almost unchangeable with the injection space, and at the same jet flow, the number of nozzles has no significant effect on the average surface coefficient of heat transfer and temperature of the impact surface. It is unnecessary theoretically to operate refrigerating equipment by applying the impinging jet cooling device to the air conditioning system of data center.