Small Data / Telecommunications Room on Slab Floor

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1 Small Data / Telecommunications Room on Slab Floor

2 Small Data / Telecommunications Room on Slab Floor During a warm summer period in 2008, Great Lakes experienced a network outage due to a switch failure in the network enclosure. After an equipment audit and a site survey, it was determined that the switch had overheated and the room itself had exceeded its designed HVAC capacity. After discovering the causes related to the failure, it was determined that the entire infrastructure and cooling methodology should be redesigned. The question then became, With limited space and constrained infrastructure, what is the best redesign strategy? Datacenter concerns typically trend in a cyclical fashion, driven by increased demand from software requirements. Increased computer capacity is then needed which creates a demand for increased power capacity. As these two demands are met, the increased load in the datacenter adds additional heat which, in turn creates a need to add cooling capacity, or make existing cooling technologies more efficient.

3 Cyclical Nature of the Data Center Industry Server Capacities increase (Compute Density) Power Demands increase (Power Density) Cooling Capacity depleted (Cooling Capacity) Each trend has an impact on the needs of the enclosure. 32% - IT projects came in on time, within budget, and with the requested features 44% - IT projects considered challenged coming in either over budget, late, or without all the required features and functions 24% - IT projects considered outright failures Source: PM Network Magazine, a publication of the Project Management Institute

4 The original data room was constructed on a slab floor 250 sq. ft. with single Mitsubishi Mr. Slim cooling unit rated at 34,600 BTU or 10.1 kw

5 The original data room included two enclosures with plexiglass front doors and solid rear doors, vented top for thermal exhaust. Using two LAN furniture systems to house the servers and workstations in addition to the switch racks, the total BTU of equipment load was calculated at 39,600 BTU/12kW.

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7 The redesign incorporated the Great Lakes Air Manager with fan tray on the slab floor to take conditioned air from the lowest point in the room and to redirect it inside the enclosure and in front of rack mounted equipment.

8 The Great Lakes Air Manager with fan tray on the slab floor helps to create a focused, continuous supply of conditioned air, inside the enclosure and in front of rack mounted equipment.

9 Rendering of Air Manager showing air flow Anemometer showing feet per minute and air temp in Fahrenheit Cross-section view of the proposed cooling solution using the air manager and chimney

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11 Without a raised floor, fan trays were installed inside the two air managers to extract conditioned air from the slab, accelerate and direct it inside the enclosure front door to create a steady supply of conditioned air to rack-mounted equipment

12 The data room redesign included the addition of a second, identical CRAC unit to achieve effective, more balanced cooling and to add redundancy to the cooling system. This provided 69,000/20.2 kw BTU of cooling as well as failover in the event of the loss of a single unit.

13 The conditioned air was forced to the floor using a plexi shelf across two of the new enclosures and solid rear doors. The cold air moved to the floor, where the intake fan from the air managers pulled it into the two enclosures. Heated exhaust was ducted and directed to the hot air return of the CRAC unit.

14 Custom chimney directs air at 85 F and uses an acrylic baffle to assist exhaust direction toward the CRAC unit intake, preventing it from mixing with the conditioned air and maximizing the efficiency of the unit. In each chimney, two 6 fans create 600 CFM with only a 70 Watt draw on 120 VAC

15 The open top panel of the Great Lakes ES Series enclosure saved a tremendous amount of work by allowing completed patch panels to be removed from the old enclosure and then reinstalled in the new enclosures without terminating any cable.

16 The new rack design uses perforated front doors to allow for proper equipment ventilation as well as cabling best practices to maximize airflow. The use of brush grommet along the side rails and filler panels in any unused RMU space help to restrict by-pass air as well as any hot air recirculation, while still providing cable pass-through from front-to-rear of the enclosure.

17 The use of brush grommet helps to isolate conditioned air in the front of the enclosure, while eliminating recirculation of heated exhaust and still allowing for cable pass-through.

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21 Great Lakes Case & Cabinet Corporate Headquarters P.O. Box 551 Edinboro, PA TRY-GLCC ( ) Phone: Fax: Western Distribution 4750 Joule Street Reno, NV Phone: Fax: International Aerbridge House Unit 14 Dunshauglin Business Park Dunshauglin Co. Meath, Ireland +353(0) fax +353(0)