Assessment of building renovation with modular ventilated FIPVT in terms of energy efficiency and indoor environment in office buildings

Domjan, Suzana (author), Rovan, Jure (author), Medved, Sašo (author)

Energy 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.

• Language: English
• Keywords: net-zero-energy buildings, energy renovation of buildings, buildings energy modelling, façade-integrated PVT, quasi-dynamic numerical modelling
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: 17 str.
• Numbering: Vol. 279, pt. A, art. 127497
• PID: 20.500.12556/RUL-170936
• UDC: 621.383.51:725
• ISSN on article: 1359-4311
• DOI: 10.1016/j.applthermaleng.2025.127497
• COBISS.SI-ID: 243346179
• Publication date in RUL: 22.07.2025

Record is a part of a journal

• Title: Applied thermal engineering
• Shortened title: Appl. therm. eng.
• Publisher: Elsevier
• ISSN: 1359-4311
• COBISS.SI-ID: 1861910

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: ničenergijske stavbe, energijska prenova stavb, energijsko modeliranje stavb, fasadno integrirana fotonapetostna tehnologija, PVT, kvazidinamično numerično modeliranje

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0223
• Name: Prenos toplote in snovi