Evaluation of the effect of a building energy efficiency certificate in reducing energy consumption in Korean apartments

Changyoon Ji, Minseok Choi, Taehoon Hong, Seungkeun Yeom, Hakpyeong Kim

Research output: Contribution to journalArticlepeer-review

Abstract

The building energy efficiency certificate (BEEC) is considered an important tool for saving energy in buildings and for reducing greenhouse gas (GHG) emissions in South Korea. To evaluate its effects, data on the site energy use intensity (EUI) of 2,660,159 certified and non-certified apartment units were collected from the Korea National Building Energy Database and compared. The site EUIs for total energy use of the certified apartment units with BEEC levels 1+ and 1 were 1.4–20.2% lower than those of the non-certified apartment units. Particularly, the gas use (for heating) intensity was 3.5–26.4% lower compared to that of the non-certified apartment. However, the electricity use intensity has not decreased despite BEEC because it does not consider the electricity consumption by appliances. In addition, the EUI of the certified apartment units with BEEC level 2 was higher than that of the non-certified apartment units in Group B. These show that the BEEC level 1 or higher contributed to reducing heating energy although its effect was different by climatic regions and the size of apartment units, but its effect on the electricity use intensity was insignificant. It shows that BEEC needs to be improved and some policies are needed to make residential building occupants more aware of the need for them to reduce their electricity consumption and to encourage them to do so.

Original languageEnglish
Article number111168
JournalEnergy and Buildings
Volume248
DOIs
Publication statusPublished - 2021 Oct 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grand funded by the Korea government (MSIT; Ministry of Science and ICT) (NRF-2018R1A5A1025137).

Publisher Copyright:
© 2021 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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