FOCUS on COOLING
HITACHI HIGH EFFECIENCY MODULAR COOLING SOLUTIONS RELY ON GRAVITY NOT PUMPS OR COMPRESSORS
The evolution of the ICT industry is leading us down the cloud environment. The natural progression of the cloud based service model begins with consolidation and virtualisation. The results include higher IT loads and a necessity for reliable and effi cient cooling solutions.
Over the last few years, innovative cooling technologies have taken a mainstream place due to increased energy costs and a need to improve data centre power consumptions. Hitachi, leveraging its vast engineering resources and history in providing cooling solutions for mission critical applications, brought the Natural Circulation technology to Europe early last year.
The Natural Circulation technology is a simple and yet innovative solution that uses gravity, instead of relying on compressors and pumps for refrigerant circulation, as a result delivering an efficient, reliable, and easy to maintain system.
Most recently, Hitachi delivered yet again, a high- density modular based cooling solution for TELEHOUSE in London.
In March 2010, TELEHOUSE opened their new facility TELEHOUSE London Docklands West in London, UK. The facility is designed to deliver circa 3-6kW per IT rack and has the associated cooling capacity to accommodate these loads. Originally, TELEHOUSE had not fixed on the methodology for delivering higher- density loads (6-10kW per rack) albeit the power and chiller capacity were available and factored into the original design. Due to customer demands and
the success of the first high-density cooling solution installation by Hitachi, TELEHOUSE required the fitting of an additional, dedicated high-density cage. TELEHOUSE’s cooling requirement for this cage was a solution that could complement the existing Computer Room Air Conditioner (CRAC) unit cooling system and enhance the cooling provision from 4kW per IT cabinet to 10kW per IT cabinet, with the CRAC units providing the initial 4kW per cabinet. The fit-out of the mechanical and electrical components serving the hall were already installed by this time. Therefore any new solution had to be modular, scalable, highly energy efficient, and not impacting the existing TELEHOUSE operations or infrastructure. TELEHOUSE recognised the need for a flexible IT load solution capable of operating in low, medium, and higher densities.
The Natural Circulation Cooling solution was ideal, capable of meeting TELEHOUSE’s and their customers’ requirements. Hitachi delivered a full turnkey solution comprising of our In-Row NC Rack units, with N+N resilience. This provided the additional 6kW per IT rack, resulting in a total capacity of 10kW per IT rack. For TELEHOUSE, the delivered solution provides the increased cooling capacity of 10kW per IT rack with no additional pumps or compressors, thereby considerably reducing power consumption levels. The NC Racks can be set in either manual or automatic fan settings, giving full control to the owner/ operator. Incorporating variable speed fans and a regulating refrigerant valve enables the solution to adapt to different IT capacities and heat loads. The NC Racks are piped and cooled via an external chiller system providing chilled water to requisite heat exchangers. The delivered solution resulted in zero impact on existing operations and was designed and delivered in a modular concept so as to fit within the existing environment.
RESULTS The NC solution’s significant power efficiencies continue across varying IT loads while maintaining environmental conditions. Power consumption*1 for
the 4.68kW*2 delivered NC solution is approximately while cooling a capacity of 138kW. This
power consumption is reduced approximately 45%*3 compared with CRAC units, and up to 50%*4
compared with traditional ‘In-Row’ products. As a net result, the carbon footprint and energy bill for this space in TELEHOUSE has significantly been reduced for this high density offering. Hitachi completed a full Integrated System Test (IST) for the installation, during which all failure scenarios were tested. Throughout the test, the solution prove it’s resilience by maintaining the server air-on temperature well within TELEHOUSE’s Service Level Agreement (SLA) temperature range.
Contact for further information Hitachi Europe Ltd. Whitebrook Park Lower Cookham Road Maidenhead Berkshire, SL6 8YA Tel: 01628 585 000 Email: firstname.lastname@example.org
*¹ NC Rack Unit Only *² 4.68kW = NC Door Power Consumption (780W) x Number of NC Racks (6)
*³ 45% = (1 - 4.7kW / CRAC Power Consumption) x 100 *4 50% = (Power Consumption of Competitor’s Unit - 0.78kW) / Power Consumption of Competitors Unit X 100 (includes fan and pump power)
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