ZEMCH 2019 International Conference Proceedings April.2020 | Page 151
Disaggregation of weather‐sensitive and ‐insensitive
energy usage using monthly utility bill data
Deuk‐Woo Kim 1*, Hyery Shin 2 and Seong‐Eon Lee 3
1
*
2
3
Korea Institute of Civil Engineering and Building Technology, Goyang, South Korea; [email protected]
Correspondence: [email protected]; Tel.: +82‐31‐910‐0152
Korea Institute of Civil Engineering and Building Technology, Goyang, South Korea; [email protected]
Korea Institute of Civil Engineering and Building Technology, Goyang, South Korea; [email protected]
Abstract: Total energy use intensity (TEUI) is commonly used as an indicator of general energy
performance. As TEUI is an aggregated quantity of all end‐energy uses, its meaning is somewhat
ambiguous. End‐use consumption data provides more detailed information and can reveal how
energy flows through a building. This can allow the prioritization and selection of areas that should
be investigated and actions that can be undertaken. However, one of the main barriers to this type of
investigation for small and medium buildings is the cost relevant to the sub‐metering and
maintenance. This study proposes a simple cost‐effective method to disaggregate the energy
consumption of three end uses. We disaggregate the total energy consumption into weather‐
insensitive energy for indicating the baseload consumption, and weather‐sensitive energy for
indicating the heating, and cooling energy consumptions. The method utilizes the monthly variation
of electricity and gas energy consumption patterns for the estimation. This approach is validated by
comparing to detailed end‐use measurement data of two office buildings. It was determined that the
overall error for base load, heating, and cooling estimates are 16.5%, 17%, and 7%, respectively. The
results imply that the proposed method may be a suitable alternative, especially for small or medium‐
sized buildings, as it alleviates the burden of the detailed end‐use measurements and its maintenance
Keywords: Disaggregation; Monthly Utility Bill Data; Total Energy Use Intensity (TEUI); Small or
Medium Buildings; Energy End‐uses;;
Disaggregation of weather-sensitive and -insensitive energy usage using monthly utility bill data
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