Experimental Investigation of the Surface Temperature Effect on Exergy Loss in Photovoltaic Panels With Different Materials and Tilts
INTERNATIONAL JOURNAL OF ENERGY RESEARCH, sa.2026:1293591, ss.1-28, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1155/er/1293591
- Dergi Adı: INTERNATIONAL JOURNAL OF ENERGY RESEARCH
- Derginin Tarandığı İndeksler: Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Earth, Atmospheric, & Aquatic Science Collection (ProQuest), Engineering Source (EBSCO), Scopus, Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest), Aerospace Database, Science Citation Index Expanded (SCI-EXPANDED), Compendex, Environment Index, INSPEC, Directory of Open Access Journals
- Sayfa Sayıları: ss.1-28
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Trakya Üniversitesi Adresli: Evet
Özet
This study experimentally investigates the energy and exergy performance of monocrystalline and polycrystalline silicon photovoltaic (PV) panels at different tilts and introduces the concept of the surface temperature-dependent exergy loss coefficient. In the study, the effect of an increase in panel surface temperature on exergy losses was systematically analyzed, and a new performance metric expressing this effect as a dimensionless coefficient was developed. Under the climatic conditions of Edirne, Turkey, surface temperature, electrical power output, and meteorological data for monocrystalline and polycrystalline silicon PV panels were recorded using precise sensors throughout August and September 2025 under identical conditions. The obtained data were evaluated for energy–exergy efficiency and analysis of the surface temperature-dependent exergy loss coefficient. Using multivariate regression analysis, a mathematical model of the exergy loss coefficient as a function of surface temperature was developed, accounting for panel type, surface temperature, PV panel tilt, solar irradiance, ambient temperature, and wind speed. According to analyses based on data obtained from experimental studies, the critical temperature at which the exergy loss coefficient changes for both panels is in the range of 35–45°C (310.15–318.15 K). Within the critical temperature range, the dimensionless exergy loss coefficient for polycrystalline and monocrystalline silicon PV panels ranges from 19 to 23. For monocrystalline silicon PV panels, the exergy loss coefficient is 1–2 units lower than that of polycrystalline PV panels. The fact that the coefficient takes on low values indicates that the increase in panel surface temperature has a limited effect on exergy loss and that the panel is more resistant to temperature increases. The proposed coefficient enhances the comparability of PV systems across different climates and panel types and also provides a new standard for performance evaluation in hot climates.