Solution #1: 100kW Data Center
In 2008, Temperature Control Services, LLC air conditioned the first ever, pressurized cold aisle data center. The customer selected Temperature Control Services to design /build a cooling system that would be cost effective and energy efficient. The customer saved over $100,000.00 in first cost and 70 percent in annual energy savings.

Temperature Control Services, LLC used standard commercial air conditioners with economizes and a proprietary control system that provides N+1 redundancy, 100 percent sensible cooling with independent humidity control and high efficiency air filtration.

The system completely eliminated hot spots, which have plagued data centers. Rack temperature measurements, scanned with an infrared camera, showed no temperature difference from the top to the bottom of the rack.


 

This photo shows the servers being cooled in an enclosed pressurized cold aisle. Conditioned air is distributed above the ceiling in a pressurized plenum feeding the cold aisle. A separate pressure control maintains a uniform pressure in the cold aisle when the air conditioner is using the economizer to provide 100 percent outside air to cool the servers. An access door and a partition isolate the pressurized cold aisle from the hot aisle and work stations located within the data center.
 

The data center hot aisle is shown with the air conditioners return located in the ceiling area and isolated from the pressurized plenum ceiling. The servers and wiring are easily accessible.

The work station is located in the data center and kept at the same temperature as the pressurized cold aisle of between 74 - 76 degrees F. LaminAir perforated ceiling tiles are used in the pressurized plenum to keep the workstation at the same temperature as the cold aisle.
 

This photo shows the air conditioners ducted into the second floor of the building where the data center is located. The air conditioners share a common duct system. Either air conditioner can serve as the primary unit. The secondary unit serves as backup to the first unit providing 100 percent redundancy. The primary unit operates at high air flow to provide 100 percent sensible cooling. The secondary unit operates at low air flow to provide latent cooling (humidity control) when needed. The blowers on both units operate continuously. Each week the proprietary control system alternates the function each air conditioner performs to balance component wear and to prove readiness of the back up unit. A control system failure automatically switches the air conditioning units to their own control system to provide additional system reliability. The room pressure control maintains a uniform cold aisle pressure level of approximately 0.1 inches water column.

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