CABA Information Series

IS-2008-125: Wireless Sensor Technology for Data Centers

This paper explains how a data center can reduce energy consumption by using sensors for monitor temperatures throughout the building.  The objective is to avoid over-cooling the building by providing sufficient cooling where needed. The Sacramento Municipal Utility District (SMUD) sponsored this investigation.  A wireless mesh network of 400 sensors was installed in the SMUD data center.  These sensors recorded 1,800,000 measurements during November 2007.  Two computer room air-conditioners were identified that could be turned off.  The net annual savings projected for SMUD was 13% (300,160 kWh), 22% in reclaimed floor space, and 9% additional energy available for data center growth.






















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