Thermal performance evaluation of air and argon-filled double-glazing units: a comparative study via experimental testing and CFD modeling
Engineering Research Express, vol.8, no.12, 2026 (ESCI, Scopus)
- Publication Type: Article / Article
- Volume: 8 Issue: 12
- Publication Date: 2026
- Doi Number: 10.1088/2631-8695/ae79ee
- Journal Name: Engineering Research Express
- Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus
- Keywords: CFD, double-pane, heat transfer, thermal comfort, thermal conductivity
- Süleyman Demirel University Affiliated: Yes
Abstract
Thermal comfort conditions in buildings can be achieved by properly insulating wall and window surfaces. Various studies in the literature have been performed to increase thermal comfort via insulation. The choice of proper glass is important in the design of windows, and one of the methods is double glazing, which is widely used nowadays. In double glazing, the layer of air between the glasses acts as a natural insulator, increasing the thermal resistance and improving its thermal performance. In this study, the thermal conductivity (k) of the glass used in the studies is taken directly from the standardized tables, and calculations and analysis are performed with these values. The thermal conductivity values of the glass samples were measured in laboratory for the location of the Isparta Province of Türkiye. Additionally, computational fluid dynamics analyses were performed on the glass samples, and the k-values were obtained numerically. The study investigates the effect of different gas layer thicknesses (12, 16, 19, and 20 mm) for dry air and argon. To study heat transfer, the glass thicknesses in double-glazed systems are specified as 4 mm and 8 mm, respectively. The k values were measured experimentally, and the numerical values were compared in study. The results showed that the experimental results are in good agreement with the numerical results. It is concluded that the optimum air and argon layer thickness for the Isparta province of Türkiye is 4 × 19 × 8 mm, and argon showed better results when the air and argon were compared.