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2026 Vol.46, Issue 3 Preview Page
Experimental Analysis of the Thermal Performance of a Green Remodeling Window System Using Suspended-film Multi-Cavity Glazing

필름 삽입형 다중 공기층 유리 적용 그린리모델링 창호 시스템의 열적 성능 실험 분석

Seojin Lim1
,
Kyungjoo Cho2*
임 서진1
,
조 경주2*
1Undergraduate Student, School of Architecture and Architectural Engineering, University of Seoul
2Senior Researcher, Department of Building Energy Research, Korea Institute of Civil Engineering and Building Technology
1서울시립대학교 건축학부 건축공학전공, 학사과정
2한국건설기술연구원 건축에너지연구본부, 수석연구원
*Corresponding Author
30 June 2026. pp. 193-205
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Abstract

Multilayer glazing is widely applied to improve the thermal performance of windows. However, its application to existing buildings is hampered by practical issues such as increased weight. To address these problems, this study established a green remodeling (GR) window system leveraging film-inserted triple glazing and experimentally evaluated its applicability. First, to examine whether the insulation performance of existing double glazing could be improved to the current standard, the thermal transmittance of the GR window system was analyzed using WINDOW 7.8. The simulation results indicated that the U-value decreased from 2.36 W/m2·K for the double-glazing system to 1.60 W/m2·K for the GR window system. The ECO2-OD program was used to determine the decrease in the energy demand of an existing building after applying the GR window system. The annual heating energy demand was reduced by 13% compared with that of a building featuring conventional double-glazed windows. For the full-scale experiment, two laboratories were constructed under identical conditions, one equipped with conventional double-glazed windows and the other featuring the GR window system. Heating was performed for 8 h under identical conditions using heaters, and measurements were recorded over three days using surface temperature sensors and energy-consumption loggers. The interior glass surface temperature of the GR window system was, on average, 2.32 K higher than that of the double-glazing system, while the exterior surface temperature was 1.6 K lower. Compared with the conventional double-glazing system, the laboratory with the GR window system exhibited an average reduction of approximately 11.05% in the heating energy consumption.

Keywords
Green remodeling
Film-inserted multi-layer glazing
Window performance
Energy saving
Glass surface temperature
Thermal transmittance, U-value
키워드
그린리모델링
필름 삽입형 다층 유리
창호 성능
에너지 절감
유리 표면온도
열관류율
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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 : 46
  • No :3
  • Pages :193-205
  • Received Date : 2026-03-31
  • Revised Date : 2026-05-07
  • Accepted Date : 2026-05-21
  • DOI :https://doi.org/10.7836/kses.2026.46.3.193
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