Analysis of Building Carbon Emissions and Energy Consumption for Vertical and Horizontal Expansion Remodeling of Office Buildings

Purpose: This study aims to propose sustainable transition plans for aging office buildings by predicting carbon emissions and energy consumption based on increased building sizes during remodeling or reconstruction. Method: The methodology of this research includes: ① Setting up analysis models for large, medium, and small-scale office buildings based on the current status of office buildings on Teheran-ro in Gangnam-gu. The increase in possible building size is limited to 30% of the existing gross floor area. ② Using Autodesk&quots Revit program to model and analyze the energy consumption and carbon emissions of each analysis model. ③ Analyzing the carbon emissions and heating and cooling energy consumption of office buildings for each scale-specific transition alternative. Result: The differences in operational carbon emissions and total energy consumption for different transition alternatives are minimal. Planning alternatives based on building size are necessary due to specific range values for each scale. Average growth rates are 8.4% for small, 5.0% for medium, and 3.0% for large office buildings. As floor numbers increase, both operational carbon emissions and energy consumption per unit area decrease, with carbon emissions decreasing more significantly than energy consumption. Future research will include active design elements and embodied carbon considerations.