jailcd2021027: Impact of Window-to-wall Ratio on Building Energy Consumption

Abstract

This paper focuses on the impact of fenestration system with various window-to-wall ratios based on changes in building azimuth on the performances of indoor daylighting and air temperature, as well as building energy consumption in the traditional dwellings. Previous studies, about the impact of window on the building energy consumption, fail to reveal the optimum window-to-wall ratios for the traditional dwellings situated in South China. Here, we first erected the integrated models, which were coupled the various window-to-wall ratios with angle rotations in building azimuth for the traditional dwellings. The total energy consumption, including the artificial lighting and air conditioning, in the test scenarios with different window-to-wall ratio-building azimuth combinations was demonstrated to be dissimilar, under reasonable assumptions in the energy simulation. Then the optimum window-to-wall ratios were recommended for each building azimuth interval, based on the criteria of energy cost and indoor daylighting. Furthermore, a new evaluation method used for assessing the building energy saving potential was proposed and applied, on the basis of the evaluation parameter of window-to-wall ratio.