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VLAN auditing for preliminary assessment of after hours networked equipment electricity wastage

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  • Schoofs, A.
  • Ruzzelli, A.G.
  • O’Hare, G.M.P.

Abstract

Powering networked equipment after business hours is a primary source of electricity wastage in office buildings. In situ surveys, deployment of software agents and power measurements are generally conducted to estimate how well an IT infrastructure performs before enforcing energy-efficient solutions. Those approaches have cost and deployment constraints, obstacles for companies unwilling to invest time and money if return on investment is uncertain. This work proposes a novel approach based on virtual local area network (VLAN) auditing, capable of producing at low-cost and non-invasively a preliminary assessment of after hours networked equipment electricity wastage, providing factual insights to support the deployment of more expensive solutions. Experimentation within a University department, comprising more than 450 unique networked machines, has shown that (1) 10% of client machines regularly used have been constantly powered on, 68% have had nighttime activity and 53% week-end daytime activity; (2) 38% of machines have exhibited clear patterns of electricity wastage at nighttime, representing 5–6% of the School total power consumption, and (3) 35% of machines have exhibited clear patterns of electricity wastage during week-end days, representing 12–15% of the School total power consumption.

Suggested Citation

  • Schoofs, A. & Ruzzelli, A.G. & O’Hare, G.M.P., 2011. "VLAN auditing for preliminary assessment of after hours networked equipment electricity wastage," Energy, Elsevier, vol. 36(12), pages 6910-6921.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:12:p:6910-6921
    DOI: 10.1016/j.energy.2011.09.032
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    References listed on IDEAS

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    1. Mungwititkul, W. & Mohanty, B., 1997. "Energy efficiency of office equipment in commercial buildings: The case of Thailand," Energy, Elsevier, vol. 22(7), pages 673-680.
    2. Webber, Carrie A. & Roberson, Judy A. & McWhinney, Marla C. & Brown, Richard E. & Pinckard, Margaret J. & Busch, John F., 2006. "After-hours power status of office equipment in the USA," Energy, Elsevier, vol. 31(14), pages 2823-2838.
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    1. Kamilaris, Andreas & Kalluri, Balaji & Kondepudi, Sekhar & Kwok Wai, Tham, 2014. "A literature survey on measuring energy usage for miscellaneous electric loads in offices and commercial buildings," Renewable and Sustainable Energy Reviews, Elsevier, vol. 34(C), pages 536-550.

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