An Analysis of Optimal Data Resolution on Change Point Model for Public Open Data Based Building Energy Consumption Diagnosis

Seheon Kim; Beom-Jun Kim; Hansol Lim; Ki-Hyung Yu; Jae-Weon Jeong

doi:10.22696/jkiaebs.20230035

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2023 Vol.17, Issue 6 Preview Page Next Page

Research Article

An Analysis of Optimal Data Resolution on Change Point Model for Public Open Data Based Building Energy Consumption Diagnosis 공공데이터 기반의 건물 에너지 진단을 위한 Change Point Model의 최적 데이터 해상도 분석

30 December 2023. pp. 411-421

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Abstract

This paper aims to analyze optimal resolution for energy consumption data to improve data-driven building energy consumption diagnosis with the ASHRAE change point model. A 9-floor office building is selected as a target, and hourly data is measured throughout a year. Heating, cooling, and other types of energy consumption are measured separately, to find truth values of the heating change point and cooling change point, which refers to the temperature at which the building starts heating or cooling. After the truth change point is found, the total sum of the consumption is resampled along different time intervals, to reflect various levels of data resolution. Change point models are built with each differently resampled data, and their results including change point and RMSE were compared to find the optimal time interval of the data. The result showed 2-week interval is the optimal interval. However, an unordinary pattern, which may be due to individual heating or cooling appliances being counted as appliance consumption rather than cooling or heating consumption, is observed as well. The results of this study suggest that the resolution of public data needs to be improved for the energy consumption diagnosis based on public data, and the usage of individual heating and cooling devices needs to be considered additionally in the diagnosis process.

Keywords

Change point model

Public open data

Time-series data

Data resolution

Building energy performance

키워드

Change point model

공공데이터

시계열 데이터

데이터 해상도

건축물 에너지 성능

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Information

Publisher :Korean Institute of Architectural Sustainable Environment and Building Systems
Publisher(Ko) :한국건축친환경설비학회
Journal Title :Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
Journal Title(Ko) :한국건축친환경설비학회논문집
Volume : 17
No :6
Pages :411-421
Received Date : 2023-11-30
Revised Date : 2023-12-09
Accepted Date : 2023-12-12
DOI :https://doi.org/10.22696/jkiaebs.20230035

Journal of Korean Institute of Architectural Sustainable Environment and Building Systems ISSN:1976-6483(Print) 2586-0666(Online) 한국건축친환경설비학회논문집

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