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Energy usage and cost analysis of passive thermal retrofits for low-rise residential buildings in Seoul

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  • Yang, Sungwoong
  • Cho, Hyun Mi
  • Yun, Beom Yeol
  • Hong, Taehoon
  • Kim, Sumin

Abstract

This study focuses on the energy performance of low-rise residential buildings and on the technological improvements required to improve their performance. As most low-rise residential buildings in Korea are old, they are being renovated to improve their energy efficiency. However, as renovations are expensive, the government intends to apply low-cost energy-efficient technologies that are currently in use as well as quantify their performances. To this end, low-rise residential buildings in villages were selected for the survey; among these, five buildings were evaluated for the application of energy-efficient technologies. Based on the survey, which included information on the actual energy consumption, the reliability of the simulation analysis was verified, and the effects of the technologies were evaluated. The survey focused, in particular, on the airtight performance of the implemented technologies, the efficiency of the heating equipment, and the insulation performance. Moreover, the performances were validated quantitatively by actual measurements. As a result, the energy saving for each technology were evaluated, and the corresponding annual savings were calculated. Finally, the payback period of the investment was evaluated using economic analysis.

Suggested Citation

  • Yang, Sungwoong & Cho, Hyun Mi & Yun, Beom Yeol & Hong, Taehoon & Kim, Sumin, 2021. "Energy usage and cost analysis of passive thermal retrofits for low-rise residential buildings in Seoul," Renewable and Sustainable Energy Reviews, Elsevier, vol. 151(C).
    • Handle: RePEc:eee:rensus:v:151:y:2021:i:c:s1364032121008935
    DOI: 10.1016/j.rser.2021.111617
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    References listed on IDEAS

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    1. Hong, Jong Ho & Kim, Jitae & Son, Wonik & Shin, Heeyoung & Kim, Nahyun & Lee, Woong Ki & Kim, Jintae, 2019. "Long-term energy strategy scenarios for South Korea: Transition to a sustainable energy system," Energy Policy, Elsevier, vol. 127(C), pages 425-437.
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    3. Saroglou, Tanya & Theodosiou, Theodoros & Givoni, Baruch & Meir, Isaac A., 2019. "A study of different envelope scenarios towards low carbon high-rise buildings in the Mediterranean climate - can DSF be part of the solution?," Renewable and Sustainable Energy Reviews, Elsevier, vol. 113(C), pages 1-1.
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    6. Fong, K.F. & Lee, C.K., 2012. "Towards net zero energy design for low-rise residential buildings in subtropical Hong Kong," Applied Energy, Elsevier, vol. 93(C), pages 686-694.
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    1. Lin, Deqing & Wu, Tingjin & Liu, Ke & Liu, Yuxuan & Zhao, Linzhi & Xu, Xiaodong, 2026. "Explainable multi-objective optimization for building retrofit considering uncertainty," Energy, Elsevier, vol. 342(C).
    2. Hamed, Mohammad M. & Alkhreasha, Aseel & AlShaer, Ahmad & Olabi, Abdul Ghani, 2025. "Promoting sustainable development goals through energy-related behaviors of household occupants: Fostering sustainable energy solutions in developing countries," Renewable and Sustainable Energy Reviews, Elsevier, vol. 213(C).

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