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Wednesday, May 13 • 10:30am - 11:00am
Profiling OCP Servers for Holistic Air Cooling

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Minimizing data center energy use requires a 'holistic' cooling approach, implying that both the air handler and server fans must be operated with control algorithms that work together. While some conditions can increase efficiencies of the cooling system, the effect on the server fans and CPU current leakages must also be considered. To obtain the recipe to run the data center at maximum efficiency a 'sweet spot' is identified, yielding conditions that are favorable for both the cooling equipment and servers.

OCP servers are tested in a windtunnel at the ICE data center research facility at RISE Research Institutes of Sweden in LuleÂ. The 10 meter windtunnel consits of a heat exchanger for cooling, a heater, humidifier and a fan. The windtunnel can be used to control the pressure, temperature and humidity at the inlet to the server while measuring parameters such as temperature differential and server airflow.

The workshop presents a custom fan controller that has been implemented on OCP servers to maintain CPU temperatures at a desired setpoint irrespective of the workload, inlet temperature or pressure. The cooling control software is adjusted depending on operating conditions of the servers to minimize the cooling energy.

Adopting this holistic cooling approach with OCP servers and EcoCooling direct fresh air ventilation units has achieved PUE values less than 1.01 as demonstrated in the EU Horizon 2020 funded project, Boden Type DC, where two 150kW OCP data centers were tuned with holistic control tactics.

avatar for Jon Summers

Jon Summers

Scientific Leader in Data Centers, Research Institutes of Sweden
My main area of research these days is on thermal and energy management of the digital infrastructure. I have worked in a research environment focused on heat transfer from the chip to the chiller in the backdrop of using real IT equipment, which lead me to join RISE in the north... Read More →
avatar for Jeffrey Sarkinen

Jeffrey Sarkinen

Research Engineer, RISE Research Institutes of Sweden
My area of interest is data centers with a focus on energy efficiency. Being involved in research projects has allowed to gain experience in data collection and monitoring, automatic control systems, data analysis and thermal management. I studied electrical engineering at the University... Read More →

Wednesday May 13, 2020 10:30am - 11:00am PDT
OCP Case Studies