Volume 30: Urban Energy Systems towards Carbon Neutrality

Structure Optimization on Water-Air Mixed Cooling Heat Sink When Used for Server Cooling Wei He, Chenchen Xu, Shengchun Liu, Linlin Liu, Yabo Wang, Hailong Li

Abstract

With the rapid development of data centers, data center servers generate a lot of heat when working, and timely heat discharge is beneficial to the normal operation of servers. To reduce the energy consumption of the data center cooling system, a water-air hybrid cooling heat sink is designed and its structure is optimized to meet the memory and chip cooling demand but meanwhile without discharging heat to the atmosphere. When taking the chip temperature, memory temperature, outlet air temperature, and pressure drop as target variables, the heat sink structure optimization is done by analyzing their effect on server cooling performance. Also, the optimal required air inlet speed is explored based on obtained optimized structures. The results show that the optimal duct number is 2, the optimal duct width is 35 mm, the optimal distance between ducts is 14 mm, the optimal heat sink width is 41 mm, and the fin height is 1.5 mm. The optimal required inlet air speed is 4 m s-1 when the air inlet temperature is 25 °C.

Keywords water-cooled, air-cooled, heat sinks