20.500.12556/RUL-167473 Effect of solar photovoltaics on green roof energy balance and evapotranspiration Photovoltaic green roofs represent an emerging technology that combines on-site renewable energy production with the environmental benefits of green roofs. Detailed models for calculating energy fluxes on photovoltaic green roofs are presented, relying on accessible meteorological data and setup geometry as input data. A key focus is the accurate modelling of longwave radiation, an often-overlooked component of energy balance. Experimental results reveal up to a 100 W m$^{–2}$ difference in incoming longwave radiation on green roof surface under photovoltaics compared to open-sky conditions, demonstrating the significant impact on the energy balance. The precise modelling of short and longwave radiation is achieved through proposed shading and view factor calculation methods, as well as with a developed parametric model for green roof surface temperature under varying shading factors. Neglecting longwave radiation exchange with photovoltaic modules would result in an 18 % underestimation of daily evapotranspiration. A complete detailed model for evapotranspiration calculation is proposed, achieving a 4.4 % normalized root mean square error for daily predictions. By accurately estimating energy fluxes and evapotranspiration, this study provides tools for quantifying water needs, optimizing the synergy between green roofs and photovoltaics, and assessing their broader impacts on urban microclimates. green roof photovoltaics longwave radiation evapotranspiration shading factor view factor zelene strehe fotovoltaika dolgovalovno sevanje evapotranspiracija faktor senčenja vidni faktor true false true Angleški jezik Slovenski jezik Članek v reviji 2025-02-24 10:52:57 2025-02-24 10:53:06 2025-03-15 04:06:38 0000-00-00 00:00:00 2025 0 0 13 str. art. 106206 Vol. 121 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 502.131.1:621 2210-6715 10.1016/j.scs.2025.106206 227097347 1-s2.0-S2210670725000836-main.pdf 1-s2.0-S2210670725000836-main.pdf 1 C97279177586C1686FB257BA52F1BBC2 6cb12e8c458a0576004aea8a46f0b9ede65510d76554d65090fd93d1b21d7e57 5ddf3854-00d8-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200710 https://www.sciencedirect.com/science/article/pii/S2210670725000836 0 3b8b54f1-f294-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=199920 Fakulteta za strojništvo 0 0 0