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Estimating the energy consumption and power demand of small power equipment in office buildings

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journal contribution
posted on 04.03.2014, 14:09 by Anna Carolina Kossmann de Menezes, Andrew Cripps, Richard Buswell, Jonathan Wright, Dino Bouchlaghem
Small power is a substantial energy end-use in office buildings in its own right, but also significantly contributes to internal heat gains. Technological advancements have allowed for higher efficiency computers, yet current working practices are demanding more out of digital equipment. Designers often rely on benchmarks to inform predictions of small power consumption, power demand and internal gains. These are often out of date and fail to account for the variability in equipment speciation and usage patterns in different offices. This paper details two models for estimating small power consumption in office buildings, alongside typical power demand profiles. The first model relies solely on the random sampling of monitored data, and the second relies on a ‘bottomup’ approach to establish likely power demand and operational energy use. Both models were tested through a blind validation demonstrating a good correlation between metered data and monthly predictions of energy consumption. Prediction ranges for power demand profiles were also observed to be representative of metered data with minor exceptions. When compared to current practices, which often rely solely on the use of benchmarks, both proposed methods provide an improved approach to predicting the operational performance of small power equipment in offices.



  • Architecture, Building and Civil Engineering

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Energy and Buildings




199 - 209


MENEZES, A.C. ... et al, 2014. Estimating the energy consumption and power demand of small power equipment in office buildings. Energy and Buildings, 75, June 2014, pp. 199–209.


© The Authors. Published by Elsevier B.V.


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This work is made available according to the conditions of the Creative Commons Attribution 3.0 International (CC BY 3.0) licence. Full details of this licence are available at: http://creativecommons.org/licenses/ by/3.0/

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