Impact Assessment of Window Orientation and Aspect Ratio on Building Energy Performance Using Comfen In The Climate of Lahore

Abstract

Windows provide outside vistas and natural light, but because they are the least thermally efficient part of a building's façade, they can also be an undesired able source of glare and direct sunlight. While maintaining a thermally and aesthetically pleasing atmosphere for building occupants, a well-designed window system in addition to appropriate control measures can drastically cut building energy usage. In this paper, window design studies for high-performance buildings are examined and evaluated. These studies can be regarded as processes of decision determination for reaching window performance goals by manipulating several design variables (e.g., orientation and dimensions/aspect ratio of windows, etc.) The research employed a dynamic method of energy calculation using the Software “Comfen” as a tool. The results are presented in bar diagrams showing statistical values obtained through software in the form of a table. The results showed no significant change in the heat gain by varying window shape on all the orientations in the climate of Lahore.