LAUSR

Enormously increased energy consumption makes it inevitable to upgrade the energy efficiency of the existing stock of buildings which share a substantial part of the overall energy consumption worldwide. Being an effective tool for analyzing energy performance, Building Information Modelling (BIM), is used to enhance the energy performance of the buildings. This study, therefore, investigates the effectiveness of applying passive cooling techniques using BIM and focuses on developing recommendations on feasible and optimized retrofitting techniques for existing buildings. Moreover, it gives an economic comparison between initial investment and returns based on the quantitative results of energy retrofitting. Thermal simulation software Autodesk Ecotect has been used to simulate annual energy consumption of one case building. Different passive cooling techniques have been applied according to Building Energy Codes of Pakistan. The input parameters are, thus, type of insulating material, the thickness of insulating materials, single and double glazing of windows and window to wall ratio. Results indicate that the annual energy consumption of selected building can be reduced up to 35 % when building incorporates passive cooling techniques with a calculated payback period of 3 years and 2 months.