The Effect of Window-Wall Ratio on Heat Loss and Energy Efficiency in Buildings: Comparative Analysis According to Different Glazing Systems and Climate Zones
DOI:
https://doi.org/10.5281/zenodo.14755364Keywords:
Window/Wall ratio , Heat loss, Building Energy Performance, Glazing types, Heat loss from windows, Window energy performance, Zero Energy BuildingsAbstract
This paper presents a study examining the effects of window-to-wall ratio on the energy efficiency of buildings. The study examines the degree-day zones in Turkey and different glazing types and shows how an increase in the window-to-wall ratio affects heat losses. In this study, the effect of 5 different glazing types (standard double glazing, argon-filled double glazing, triple glazing, coated double glazing, coated argon-filled double glazing) on heat losses for four different degree-day zones in Turkey according to the change of window-wall ratio from 0% to 100% is analytically calculated. Calculations were made in accordance with TS825 standard and total heat loss for each zone was analyzed separately. The findings are presented in figures and tables. In the study, it was determined that the increase in the window/wall ratio significantly increases energy consumption. It is emphasized that this effect is more pronounced especially in cold regions. In the study in which different glazing types were used, it was observed that the contribution of coated double glazing to energy efficiency came to the fore. However, it was determined that the energy saving effect of argon gas filled glasses was limited. It was determined that each 20% increase in the window/wall ratio can increase energy consumption by at least 19.5% in hot regions and 122% in cold regions. In cold climatic conditions, it is observed that the heat loss increases by 55.6 W/m² if the building facade is fully glazed. This study provides an important guide based on comprehensive and numerical data for architects and engineers who want to increase energy efficiency in building designs.
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