Studying the Impacts of Window to Wall Ratio (WWR) on the Energy Consumption in a Residential Unit Located in Bahria Town, Lahore

Abstract

 

Abstract
The residential sector is the biggest consumer of energy globally which necessitates the need to save energy in the residential sector for a sustainable future. This study was conducted to look into the possibility of lowering energy consumption in the household sector by using windows that are suitable for the environment in Lahore, Pakistan .An existing double-story 8-marla house located in Bahria town, Lahore was selected for the analysis of energy performance. To determine the peak heating and cooling loads, the window-to-wall ratios (WWR) of the house were simulated using the REVIT model. This study also examined how limiting WWRs will affect to 10%, 20%, and 30%. It was noticed that up to 35% cuts in peak heating and cooling loads are possible on all orientations in comparison to existing WWRs by limiting the window size to 20%. However, an increase in peak cooling and heating loads was observed with 30% WWR on all orientations. The methodology used in this study aims to provide a framework to help architects and engineers choose the appropriate WWR for each orientation for energy conservation.
Keywords:  WWR, Peak heating and cooling load, Simulation tool, domestic sector