Optimization and Control of Cooling Microgrids for Data Centers
Zhou, Rongliang; Wang, Zhikui; McReynolds, Alan; Bash, Cullen; Christian, Thomas; Shih, Rocky
Abstract: Reliable operation of today's data centers requires a tremendous amount of electricity to power both the IT equipment and the supporting cooling facilities. Among the total data center electricity consumption, up to half or more could be used by the cooling system to maintain the thermal status of IT equipment. In order to lower the electricity usage of the cooling system and hence reduce the data center environmental footprint, alternative cooling resources, such as air- side economizers, are being exploited to supplement or replace the traditional chilled water based cooling schemes. The various cooling resource options, together with the mechanisms to distribute and deliver the cooling resources to IT equipment racks, constitute a cooling microgrid for reliable and efficient data center operation. In this paper, we present a holistic perspective for the control and optimization of the data center cooling microgrid, which includes cooling resources portfolio optimization in response to real-time weather changes and on-demand cooling sources distribution and delivery. The cooling microgrid control and optimization framework has been implemented in a research data center, leading to an estimate of more than 30% reduction in the yearly cooling costs.
Additional Publication Information: To be published at ITherm 2012: 13th Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems
External Posting Date: March 22, 2012 [Fulltext]. Approved for External Publication
Internal Posting Date: March 22, 2012 [Fulltext]