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2026 Vol.46, Issue 3 Preview Page
Power Generation Performance Analysis of West Oriented Bifacial PV Systems on Gable Roofs under Different Installation

박공지붕에 설치된 서향 양면형 PV 시스템의 설치 조건에 따른 발전 성능 분석

Hayoung Kim1
,
Junwon Jang2
,
Jinhee Kim3
,
Juntae Kim4*
김 하영1
,
장 준원2
,
김 진희3
,
김 준태4*
1Ph.D. Student, Department of Energy Systems Engineering, Kongju National University
2M.S. Student, Department of Energy Systems Engineering, Kongju National University
3Research Professor, Green Energy Technology Research Center, Kongju National University
4Professor, Department of Green Smart Architectural Engineering/Department of Energy Systems Engineering (Graduate School), Kongju National University
1국립공주대학교 에너지시스템공학과, 박사과정
2국립공주대학교 에너지시스템공학과, 석사과정
3국립공주대학교 그린에너지기술연구소, 연구교수
4국립공주대학교 그린스마트건축공학과/에너지시스템공학과(대학원), 교수
*Corresponding Author
30 June 2026. pp. 123-133
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Abstract

The global deployment of photovoltaic (PV) systems has accelerated to meet carbon neutrality goals by 2050. However, PV systems are strongly influenced by environmental factors such as solar irradiance and ambient temperature, resulting in variability in power generation, which may affect grid stability as PV penetration increases. In Korea, most PV systems are installed facing south to maximize energy yield, resulting in a concentration of power generation during the midday hours. To mitigate this temporal concentration, east–west-oriented PV systems have received increased attention. In building applications, PV modules are frequently installed on the same slope as gable roofs to maintain architectural aesthetics. However, most previous studies have focused on east–west PV systems on flat roofs, with limited experimental studies on bifacial PV systems installed on gable roofs. Therefore, this study experimentally investigated the performance characteristics of a west-oriented bifacial PV system installed on a gable roof using outdoor measurements. Roof albedo, module spacing, and module–roof distance were considered installation parameters. To evaluate the effects of these parameters, the front and rear plane-of-array irradiances and module performance were measured. The results indicate that roof albedo and module–roof distance are the dominant factors affecting the bifacial PV performance, whereas module spacing has a relatively minor influence. Increasing the module–roof distance also enhanced rear-side irradiance during the morning and afternoon periods, suggesting the potential for the temporal distribution of PV power generation.

Keywords
East-West oriented PV system
Bifacial PV module
Gable roof
Power generation performance
Outdoor experiment
키워드
동·서향 태양광 발전 시스템
양면형 태양광 모듈
박공지붕
발전 성능
옥외 실험
References
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3

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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 :123-133
  • Received Date : 2026-04-06
  • Revised Date : 2026-04-16
  • Accepted Date : 2026-05-13
  • DOI :https://doi.org/10.7836/kses.2026.46.3.123
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