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New Schneider Electric White Paper Provides Cost and Benefit Analysis of Prefabricated vs Traditional Data Centres


News provided by

Spa Communications Ltd

Mar 03, 2016, 04:00 ET

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Schneider Electric White Paper 218
Schneider Electric White Paper 218

London, United Kingdom (PRWEB UK) 3 March 2016 -- Prefabricated data centres are growing in popularity, especially for smaller Edge of Network installations thanks to the proven benefits of speed of deployment and scalability. The provision of ever more reliable reference designs and customisable, pre-assembled and factory-tested modular building blocks further enhances their appeal.

The issue of CAPEX can be confusing with opinions divided as to whether prefab implies a more expensive outline investment. WP #218 offers insight into the complexities of the issue by using a systematic comparison of the capital costs involved.

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The ability to match the size of a data centre to the immediate load required, with the ability to expand or add capacity as necessary, is a strength of adopting the prefabricated approach. However, the issue of capital expenditure (CAPEX) can be confusing with opinions divided as to whether prefab implies a more expensive outline investment than a traditional approach for a data centre design and build.

A new White Paper from Schneider Electric, a global specialist in energy management and automation, WP #218 ‘Quantitive Analysis of a Prefabricated vs Traditional Data Center’, offers insight into the complexities of the issue by using a systematic comparison of the capital costs involved in building two data centres with identical capacity, levels of redundancy, power and cooling architectures, density and number of racks; one built using prefabricated modules and the other built by traditional methods. By isolating the capital costs from other variables, the paper allows a direct comparison between the two approaches to be made.

CAPEX costs include those associated with materials, design site preparation, equipment installation and commissioning. The paper analyses two 440kW data centres, each based on a documented reference design. Both installations used the same major components such as UPS systems, chillers, racks and rack power-distribution units (PDUs).

In each case the space consisted of 44 IT racks each capable of supporting an average of 10kW/rack of IT load. Hot aisle containment was used to optimise airflow in the space, whilst the exact arrangement of racks, coolers and PDUs varied between the two designs. For the prefabricated centre, two dual-bay IT modules were used whereas the traditional centre comprised a single large IT room containing all 44 racks and the supporting infrastructure.

Third-party data centre modelling software from Romonet was used to perform the capital cost comparison. Assumptions were made, for a given location, for the cost of labour and for the difference in price between vacant land (for the prefab) and finished building space for the traditional data centre.

Materials for prefabricated data centres cost more as they ship with physical structure pre assembled and include the physical housing or containers as well as the factory integration work. The largest material premium for the prefabricated approach was for the IT room, followed by the cooling system.

On the other hand, onsite labour for prefab is cheaper as most of the integration work has already been completed in the factory. The cost of space, determined largely by the difference between vacant as opposed to developed real estate, represents a big saving for using a prefabricated solution.

Sensitivity analysis reveals that there are two key variables affecting the capital expenditure, namely building cost and average power density/rack. At higher densities the savings achieved by using the prefabricated approach increase as more load can be housed in the same fixed module space. As density decreases, more modules are needed to house the same IT load and so the additional material overhead diminishes the savings.

For the example studied, capital costs were found to be 2 per cent cheaper overall for the prefabricated approach with lower space and labour costs offsetting the greater material cost incurred.
The study concludes that there are many variables to be considered when assessing the capital costs of either approach and so each deployment should be considered on its particular merits.

The White Paper 218 entitled “Quantitative Analysis of a Prefabricated vs Traditional Data Center” is available for free download by visiting http://www.apc.com/wp?wp=218

==Ends==

About the authors

Wendy Torell is a Senior Research Analyst at Schneider Electric’s Data Center Science Center. In this role, she researches best practices in data-centre design and operation, publishes white papers and articles, and develops TradeOff Tools to help clients optimise the availability, efficiency, and cost of their data-centre environments.

Mercedes Cortes is a Senior Systems Design Engineer at Schneider Electric. In this role, she develops reference designs for data centres and supports R&D, marketing and sales through her research and analysis of alternative applications for the data-centre solution portfolio.

James Luntz is a Senior Mechanical Engineer for the Prefabricated Data Center group of Schneider Electric. He is a lead engineer in creating custom-designed prefabricated solutions for a wide range of businesses, from small and rugged military customers to internet giants and colocation data-centre service providers.

About Schneider Electric

Schneider Electric is the global specialist in energy management and automation. With revenues of €25 billion in FY2014, our 170,000 employees serve customers in over 100 countries, helping them to manage their energy and process in ways that are safe, reliable, efficient and sustainable. From the simplest of switches to complex operational systems, our technology, software and services improve the way our customers manage and automate their operations. Our connected technologies reshape industries, transform cities and enrich lives. At Schneider Electric, we call this Life Is On.

http://www.schneider-electric.com

Media Contact
Schneider Electric
Lavina Dsouza
Tel.: +44 7887 560218
lavina.dsouza(at)Schneider-electric.com

Rory Flashman, Spa Communications Ltd, +44 1892511413, [email protected]

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