Experimental Evaluation of Passive Glazing Systems for Thermal Performance in Dubai’s Hot-Arid Climate

Abstract

The swift urban expansion of Dubai has resulted in the prevalent use of glass facades in skyscrapers, which, although visually attractive, present considerable difficulties regarding energy efficiency due to the region's harsh environment. This study investigated the thermal performance of various passive glazing configurations in Dubai, specifically evaluating double- (DGU), triple- (TGU), and quadruple-glazed (QGU) units. An experimental thermal glass chamber was constructed using a bottom-up methodology to facilitate the evaluation of three distinct glazing systems under severe summer meteorological conditions. Internal data loggers monitored air temperature and relative humidity to facilitate a comparative analysis of their thermal characteristics; concurrently, an external weather station documented the ambient microclimate to establish a baseline. The empirical findings demonstrated that the QGU consistently maintained lower interior air temperatures compared with other systems. Observational data and heat index measurements indicate that quadruple glazing significantly enhances indoor thermal comfort. The findings provide actionable recommendations for architects and engineers, highlighting the efficacy of sophisticated glazing solutions in mitigating the thermal problems encountered by contemporary architecture in Dubai's extreme climate. The study underscores the essential function of passive glass facades in realising ecologically efficient architectural solutions within urban environments.