Assessment of building renovation with modular ventilated FIPVT in terms of energy efficiency and indoor environment in office buildingsDomjan, Suzana (Avtor) Rovan, Jure (Avtor) Medved, Sašo (Avtor) net-zero-energy buildingsenergy renovation of buildingsbuildings energy modellingfaçade-integrated PVTquasi-dynamic numerical modellingEnergy renovation will be the challenge to fulfil the goal of zero energy for building stock. Article presents the design, modelling and performance evaluation for a modular solution of a façade-integrated photovoltaic system upgraded to supply heat and cold to the attached building (FIPVT) based on the “Balcony PV” solution. Different designs and operating strategies were analysed, from the fully integrated, naturally ventilated to bi-directionally, 3D, forced entilated FIPVT. The research was based on in-situ experiments, computational fluid dynamics (CFD) modelling and energy efficiency evaluations with the building energy modelling (BEM) tool. Experiments showed that the thermal mass of the FIPVT causes a pronounced dynamic thermal response, with the diurnal difference of the PV temperature θ$_{PV}$ being up to ± 15 K compared to the static model, and multiparametric models of quasi-dynamic temperature difference Δθ$_{dyn}$ were developed for time step numerical modelling. User-defined macros were integrated into the BEM tool for an all-year evaluation of the FIPVT. A case study showed that the efficiency of the solar energy utilization increased to 28.3 % for the forced ventilated FIPVT and could be further increased with a battery having an optimal capacity of 0.35 kWh per m$^2$ of FIPVT.20252025-07-22 10:59:52Članek v reviji170936sl