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2026 Vol.46, Issue 2 Preview Page

Research Article

Comparative Analysis of Thermal and Electrical Performance of BIPV Systems According to Building Envelope Type

외피 유형에 따른 건물일체형 태양광(BIPV) 시스템의 열･전기적 성능 비교 분석

Jinhee Kim1
,
Hayoung Kim2
,
Jinwoong Park3
,
Juntae Kim4*
김 진희1
,
김 하영2
,
박 진웅3
,
김 준태4*
1Research Professor, Green Energy Technology Research Center, Kongju National University
2Ph.D. Student, Department of Energy Systems Engineering, Kongju National University
3Researcher, SKSE
4Professor, Department of Green Smart Architectural Engineering/Department of Energy Systems Engineering (Graduate School), Kongju National University
1국립공주대학교 그린에너지기술연구소, 연구교수
2국립공주대학교 에너지시스템공학과(대학원), 박사과정
3(주)에스케이에스이, 연구원
4국립공주대학교 그린스마트건축공학과/에너지시스템공학과(대학원), 교수
*Corresponding Author
20 April 2026. pp. 29-42
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Abstract

This study comparatively analyzes the thermal and electrical performance characteristics of building-integrated photovoltaic (BIPV) systems according to the type of building facade. An insulated wall-type BIPV system using glass-to-backsheet modules and a curtain wall-type BIPV system using glass-to-glass modules were installed in a mockup building under identical conditions. The solar irradiance, ambient temperature, module front surface temperature, indoor-side surface temperature, and power generation were measured to analyze the thermal characteristics and power generation performance of the two systems. The operating temperature of the module depended on the facade structure. Under high-irradiance conditions, the front surface temperature of the module in the insulated wall-type BIPV system reached approximately 55 °C, whereas that in the curtain wall-type system remained at approximately 50 °C, indicating that the curtain wall system maintained a lower operating temperature. Correspondingly, the curtain wall-type BIPV system generally exhibited higher electrical performance, and its average efficiency was approximately 0.4–0.5 pp higher than that of the insulated wall-type system. In particular, although the rated efficiency of the curtain wall-type BIPV module was lower than that of the insulated wall-type module, the curtain wall system exhibited a higher efficiency under actual operating conditions, suggesting that differences in the module operating temperature associated with the facade configuration and rear thermal conditions may contribute to variations in the actual power generation performance. The results of this study suggest that the facade structure and rear-side thermal environment should be considered along with the rated module efficiency in the design and performance evaluation of BIPV facade systems.

Keywords
Building-Integrated Photovoltaic; BIPV
Building facade system
Insulated wall and Curtain wall BIPV
Module Temperature
Power Generation Efficiency
키워드
건물일체형 태양광
건물 파사드 시스템
단열외벽 및 커튼월
모듈 온도
발전 효율
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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 :2
  • Pages :29-42
  • Received Date : 2026-03-25
  • Revised Date : 2026-04-09
  • Accepted Date : 2026-04-10
  • DOI :https://doi.org/10.7836/kses.2026.46.2.029
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