Simulation for a Cost-Effective and Energy Efficient Retrofits of the Existing Building Stock in India using BIM

Energy-efficient retrofitting of buildings is a crucial aspect of achieving a specific outcome to both reduce global energy requirements and reduce carbon emissions. The Energy Analysis of buildings using BIM (Building Information Modeling) reduces energy consumption and optimise the economic benefits. This method is vital in assessing energy demand levels and the power-saving potential for cost-effective retrofitting measures. Energy Simulation is a computer-aided analysis that helps construction professionals to evaluate and increase energy efficiency through required modifications at the project planning phase. A detailed system boundary, including energy consumption reduction, cost savings, capital investment, technical change in emission behaviour, and comfort indexing together with sustainability problems, was defined. The article introduces a new BIM-based systematic approach to energy retrofitting, which comprises a whole spectrum of information acquisition, energy modelling, and software interoperability. This framework consists of identifying indicators; building envelops study, validation of research gap, identification, and energy simulation will help rehabilitation in a simple, reliable decision-making process.