AT-19-C059 -- Cooling System with Low Power Usage Effectiveness below 1.02x for Server Rooms

In recent times, server power utilization in data centers has increased considerably. A liquid immersion cooling system and conventional air-cooling system for low-load Hard Disk Drive (HDD) storage are used together at a data center that includes a high load server. In our previous study, we proposed the zoned server room based on heat densities and confirmed the possibility of an annual power usage effectiveness (PUE) of less than 1.04 for our proposed cooling system. In this study, we change the configuration of the cooling system using general-purpose element equipment based on the results of our experiment and last fiscal year’s annual energy consumption simulation. We measure the power consumption and PUE, and confirmed the stable operation of this cooling system in the zoned server room, achieving an annual average PUE of approximately 1.02.