Presentation Details
| Greenhouse living-lab agrivoltaic systems in Spain João Gabriel Bessa1, Jesus Montes-Romero1, Florencia Almonacid1, Alejandro C.Escabias1, Pillar F.Fernández-Villamil2, Fulgencio C.López2, Virginia H.Pérez2, Maria Giménez3, Eduardo F.Fernández1. 1Advances in Photovoltaic Technology (AdPVTech), CEACTEMA, University of Jaén, Jaén, Spain.2Instituto Murciano de Investigación y desarrollo Agrario y Medioambiental (IMIDA), Murcia, Spain.3J.Huete International, Murcia, Spain |
Abstract
Greenhouse agrivoltaics offers a promising pathway to reconcile photovoltaic electricity generation with high-value agricultural production, particularly in high-irradiance Mediterranean regions. However, greenhouse-integrated PV systems impose strict constraints on light availability, spectral quality, and microclimate, making conventional PV optimization strategies insufficient. The GLASS project addresses this challenge through a living-lab approach that combines photovoltaic characterization, crop-focused experimentation, and full-scale greenhouse validation to derive experimentally grounded design principles for agrivoltaic greenhouses. At the photovoltaic and microclimatic level, experiments conducted at the University of Jaén evaluated semi-transparent PV technologies. Electrical performance was assessed alongside broadband and spectral transmittance, with particular attention to photosynthetically active radiation (PAR) and Daily Light Integral (DLI). Results show that semi-transparent PV technologies with similar nominal transmittance can produce different DLI values and temporal light profiles due to wavelength-dependent spectral filtering. Complementary analysis demonstrates that technologies with comparable overall transmittance deliver different effective photosynthetic availability, highlighting the limitations of transparency-based metrics for agrivoltaic assessment. System-level validation was carried out through the design and deployment of a full-scale agrivoltaic greenhouse prototype at IMIDA facilities. The greenhouse covers 144 m² and integrates four evenly spaced rows of semi-transparent bifacial crystalline silicon PV modules, with a total installed capacity of 7.2 kWp. Early physiological measurements indicate a higher net photosynthetic rate in zones receiving earlier solar exposure during morning hours, while no significant differences were observed later in the day. This temporal convergence suggests that the implemented PV layout promotes a relatively homogeneous light and microclimatic distribution under steady-state conditions.
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