Variable-Speed Fan Retrofits for Computer-Room Air Conditioners


This case study documents three retrofits to existing constant-speed fans in computer-room air conditioners (CRACs), all located in California: first, a forty year-old, 6,000 ft2 data center located at the Lawrence Berkeley National Laboratory (LBNL) in Berkeley, with down-flow, water-cooled CRACs; second, a three year-old, 1,000 ft2 data center owned by NetApp in Sunnyvale, with up-flow, water-cooled units; and, third, a twelve year-old, 1300 ft2 data center owned by the Electric Power Research Institute (EPRI) in Palo Alto, with down-flow, air-cooled units.

Author(s): Greenberg, S.

Cooling Air / Air Management
Monitoring and Controls