Eagan Data Center


The Eagan campus originally consisted of two data centers (Bldgs E and F), each supported by a Tier II infrastructure. The critical systems were upgraded to increase the critical load and satisfy the need for Concurrent Maintainability (Tier III). Each data center was provided with a new dedicated Engine-Generator Plant consisting of four 2 MW Engine Generators, and new N+1 UPS System architecture consisting of five 600 kW modules for a total of 2,400 kW (2,160 kW at 90% redline) per data center. TiePoint’s involvement was instrumental for the successful load migrations, while maintaining uptime for each data center.

The Data Center facility was expanded in 2008 with its third data center (Bldg H). Similar to the original data center, Bldg H is also equipped with four 2 MW Engine Generators and five 675 kW UPS modules in an N+1 configuration to support a slightly larger IT load of 2,700 kW (2,430 at 90% redline). Unlike Bldg E and F that utilized compressorized Computer Room Units, the third data center is equipped with a Chiller Plant consisting of five 350-ton chillers (N+2) cooling towers with remote sumps (for freeze protection), and a waterside economizer. A 2N mechanical UPS system serves the CRAH fans, secondary CHW pumps, and BAS to provide continuous cooling in conjunction with a 130,000 gallon stratified Thermal Storage Tank.

In 2013, all of the engine-generators were modified with new mufflers complete with emissions controlling catalysts in compliance with the EPA’s RICE/NESHAP regulations. Full design and commissioning services were provided for each. In addition to being the engineer-of-record, TiePoint provided full Cx Services (levels 1-5) for each phase of the project. TiePoint also prepared maintenance procedures for critical infrastructure, MOP review, and owner personnel training.

Project Highlights

  • Tier III Data Center
  • Three Data Centers
  • Three UPS Systems
  • Three EG Plants
  • 2N Mech UPS System
  • Continuous Cooling
  • 6,750 kW Critical Load
  • 5 kW/IT Rack (avg)
  • 100w/SF density
  • Chiller plant at N+2