JHU Data Center Expansion

Location: 
Baltimore, Maryland
Client: 
The Johns Hopkins University
Contract Value: 
$8,800,000
Size: 
6,300 Square Feet
Year Completed: 
2008

Originally built more than two decades ago, the data center at The Johns Hopkins University (JHU) Mount Washington Corporate Campus, did not meet Tier III standards and other client-desired requirements. Clark updated electrical and mechanical equipment to maximize systems currently supporting the data center and the surrounding campus, doubling the electrical and uninterruptible power supply capacity of the existing facility.

Construction of the JHU Data Center Expansion, Phase II project was approached in three major parts. First, Clark renovated the existing 6,300 square-foot data center, and installated a new pre-action sprinkler and FM200 fire suppression system. Next, the team replaced three existing 550-ton chillers, including cooling towers and pumps, with three new 650-ton chillers, and seven new computer room air conditioning units. The last component of the project included the update of the existing 1,000 kVA uninterruptible power supply and addition of two new 500 kVA modules, switchgear and batteries and four new power distribution units to double the existing system's capacity.

The ground floor data center and first and second floors of administrative offices remained fully operational throughout construction. The original data center was built in an A side and B side configuration. Construction involved building a new B side by providing feeders from the entrance switchgear, installing switchboards, uninterruptible power supply modules, power distribution units, and remote power panels while the existing A and B sides remained functional. Once the new B side was commissioned, the existing A and B sides were combined into a single side by re-feeding all power distribution with the new conductors. The entire facility was then re-commissioned, including a full pull-the-plug utility outage integrated systems test.

A new facility monitoring and control system was installed in conjunction with the new chiller lineups. The existing and new facility monitoring and control systems operated concurrently until the migration was complete. The controllers on each computer room air conditioner unit also were replaced and upgraded on the new facility monitoring and control system. This replacement required extensive coordination, point-by-point migration and validation, and multiple commissioning steps.

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