Title: ISoQ: an exergy-based quality metric for residential PV/T systems

Authors: Hande Gunar; Samed Dogan; Oguz Ozan Yolcan

Addresses: Department of Mechanical Engineering, Kütahya Dumlupınar University, Kütahya, Turkey ' Department of Mechanical Engineering, Kütahya Dumlupınar University, Kütahya, Turkey ' Department of Mechanical Engineering, Kütahya Dumlupınar University, Kütahya, Turkey

Abstract: This study introduces the integrated solar conversion quality score (ISoQ) to evaluate hybrid PV/T systems by combining thermodynamic exergy with real-time demand matching. Dynamic hourly simulations were conducted for a standardised residence across five global climate zones using ten-year ERA5 data. Results reveal that Copenhagen achieved the highest ISoQ score (0.184) due to superior synchronisation between thermal generation and heating demand. Conversely, Dubai ranked lowest (0.091) despite maximal solar availability, as generated heat remained largely unutilised. The findings demonstrate that for residential applications, temporal load matching is a more critical performance driver than peak solar generation capacity.

Keywords: hybrid PV/T; exergy analysis; ISoQ score; demand satisfaction; building energy simulation.

DOI: 10.1504/IJEX.2026.155457

International Journal of Exergy, 2026 Vol.50 No.3, pp.254 - 263

Received: 18 Dec 2025
Accepted: 20 Feb 2026
Published online: 03 Aug 2026 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article