Coupling Calculation Method for Carbon Emission Reduction of Green Buildings based on Digital Twin Technology

It is difficult to real-time monitor energy consumption and resource utilization throughout theentire lifecycle of green buildings, resulting in significant errors in the calculation of carbon emission reductions. Therefore, a coupled calculation method for carbon emission reduction of green buildings based on digital twin technology is proposed. This method builds a green building carbon emission reduction calculation model based on energy consumption intensity within the framework of emission coefficient method, analyzes carbon emission factors and intensity, and then calculates carbon emission reduction. Based on digital twin technology, the carbon emission reduction calculation results are optimized through four steps: real-time data collection, construction of digital twin models, multi scenario simulation and scheme optimization screening, continuous optimization and dynamic adjustment, making the calculation process and results have multi factor coupling characteristics. The experimental results show that the energy consumption of green buildings calculated by this method significantly decreases. Compared with the method, the error between the actual measured carbon emissions and the method remains within $0.2 \mathrm{tCO}_{2} \mathrm{e}$ for the whole quarter. The proposed method has fast calculation speed and good model stability under different load conditions, providing strong support for the sustainable development of green buildings.