Quantification of energy savings from energy conservation measures in buildings using machine learning

Alexander Severinsen, Rob J. Hyndman

Research output: Chapter in Book/Report/Conference proceedingConference PaperOtherpeer-review

Abstract

This paper demonstrates how machine learning is used to measure energy savings from energy conservation measures (ECMs); in particular ECMs with a low expected energy saving. We develop a model that predicts energy consumption in buildings on an hourly level. The model is trained on energy data from the main meter before the ECMs took place. The model is then used to predict energy consumption after the ECMs. The difference between the prediction (the estimated energy consumption in the building given no ECMs) and the actual usage is the estimated savings. According to the International Performance and Verification Protocol (IPMVP) using data from the main meter is a recommended option when the collective savings of several ECMs are analysed, and the savings are expected to be large. For ECMs where the expected savings is less than 10 % the IPMVP recommends system simulation or installation of sub-meters to isolate the ECMs. However, when implementing smaller ECMs (<10 % expected savings) the added cost of installing sub-meters and/or undertaking system simulation could turn a positive cost-benefit analysis into negative due to the increased cost of measurement and verification. For this purpose, we show that recent developments within predictive modelling will enable the building owners to quantify energy savings from ECMs where the expected saving is less than 10 %. The model has a feature set of 32 different variables that can explain energy consumption in buildings. For example, calendar-data, minimum, maximum, and average temperatures in the past 12, 24 and 36 hours. Based on this feature set the model chooses the variables that best explain the energy consumption in each building. Results from analysis in nine Norwegian grocery stores suggests that our methods are able to detect and quantify savings from small ECMs, thus are a cost-efficient and viable alternative to simulation and installing sub-meters.

Original languageEnglish
Title of host publicationECEEE 2019 Summer Study on Energy Efficiency
Subtitle of host publicationIs Efficient Sufficient?
PublisherEuropean Council for an Energy Efficient Economy
Pages757-766
Number of pages10
Edition1st
ISBN (Electronic)9789198387858
ISBN (Print)9789198387841
Publication statusPublished - 2019
EventECEEE Summer Study on Energy Efficiency 2019: Is Efficient Sufficient? - Club Belambra Les Criques, Presqu'ile de Giens, France
Duration: 3 Jun 20198 Jun 2019
https://www.eceee.org/summerstudy/

Publication series

NameEceee Summer Study Proceedings
ISSN (Print)1653-7025
ISSN (Electronic)2001-7960

Conference

ConferenceECEEE Summer Study on Energy Efficiency 2019
CountryFrance
CityPresqu'ile de Giens
Period3/06/198/06/19
Internet address

Keywords

  • Energy saving methodology
  • Energy savings calculation
  • Gradient boosting
  • IPMVP

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