A Study on Heating Energy Reduction through Apartment Remodeling and Securing Energy Self-Sufficiency Ratio through Photovoltaic Installation

Seokhyun Kim; Haerin Oh; Hyun Cho; Suwon Yoon

doi:10.7836/kses.2025.45.5.039

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2025 Vol.45, Issue 5 Preview Page Next Page

Research Article

A Study on Heating Energy Reduction through Apartment Remodeling and Securing Energy Self-Sufficiency Ratio through Photovoltaic Installation 공동주택 리모델링을 통한 난방에너지 절감과 태양광 설치를 통한 에너지 자립률 확보 연구

30 October 2025. pp. 39-47

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Abstract

In this study, we analyzed reductions in heating costs in remodeled apartments in terms of maintenance fees due to the difficulty in quantitatively assessing the effects of remodeling in aging apartment buildings. A comparison of the heating energy consumption of a subject apartment before and after remodeling showed a reduction of approximately 66.8% per unit area. After accounting for an increase in the floor area due to expansion, the reduction per household was approximately 57.8%. An analysis of the proportion of heating costs within total management fees revealed a decrease of approximately 57.5% after the remodeling. A simulation review using the Zero Energy Building (ZEB) certification system revealed that the remodeled building’s primary energy consumption was 119.0 kWh/m², which achieved ZEB Grade 5 with an energy self-sufficiency rate of 20.94%. These findings confirm that remodeled apartment buildings provide a favorable environment for achieving energy self-sufficiency through rooftop photovoltaic installation.

Keywords

Apartment

Remodeling

Heating energy

Heating cost

Zero energy building

Photovoltaic panel

키워드

공동주택

리모델링

난방에너지

난방비

제로에너지건축물

태양광패널

References

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10.12813/kieae.2020.20.6.083

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Information

Publisher :Korean Solar Energy Society
Publisher(Ko) :한국태양에너지학회
Journal Title :Journal of the Korean Solar Energy Society
Journal Title(Ko) :한국태양에너지학회 논문집
Volume : 45
No :5
Pages :39-47
Received Date : 2025-08-26
Revised Date : 2025-09-29
Accepted Date : 2025-09-29
DOI :https://doi.org/10.7836/kses.2025.45.5.039

Journal of the Korean Solar Energy Society ISSN:1598-6411(Print) 2508-3562(Online) 한국태양에너지학회 논문집

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