Enhancing heat transfer characteristics and optimization of a multi-jet cooling system

In this work, a multi-jet cooling solution is proposed to tackle the issue of blade server chips overheating in the data center. Two insulating liquids, white mineral oil and HFE-347 were chosen. A mathematical model was developed using an orthogonal experimental design and response surface analysis. The variables comprised aperture diameter, aperture spacing and impingement distance in the jet structural parameters, with the average heat transfer coefficient and temperature difference as the optimization objectives. The flow of the jet in contact with the surface of the heat source was examined using CCD. The results demonstrate that HFE-347 fluid induces greater surface disturbance than white mineral oil. In the cooling system using white mineral oil, the optimal combination results in an average heat transfer coefficient of 1182.61 W/(m2·K) and a temperature difference of 1.31 ℃. The performance of the system is improved by 460.84 %. The cooling system using HFE-347 has an average heat transfer coefficient of 5368.24 W/(m2·K) and a temperature difference of 1.23 ℃. Compared to the original experimental results, the overall performance can be improved by up to 313.87 %.