Identifying energy saving opportunities in buildings by the analysis of time series data

Panel: Panel 2. Comfort and energy use in buildings

Authors:
Vasco Ferreira, ENERGAIA
Paul Fleming & Paul Ajiboye, De Montfort University

Abstract

This paper describes how the analysis of time series energy data can be used to identify energy saving opportunities in buildings. Using readily available historic records of energy consumption, particularly quarter-hourly and half-hourly electricity time-series data, and with basic knowledge of the building, potential energy saving opportunities can be highlighted.

A review of energy monitoring and targeting (M&T) procedures and techniques of analysing time series data have been carried out. The analysis of electricity time series data has been reviewed in the UK. This has involved analysing demand for power in 8 office buildings. Three different analytical approaches have been applied, simple visualisation and interpretation of energy use patterns, contour mapping and recurrent cumulative sum deviation (CUSUM).

This paper concludes that such approaches to analyse electrical power demand could increase the cost-effectiveness and reliability of energy audits and surveys.