Synchronization is essential for maintaining reliable and consistent digital twin environments in building operations. However, achieving accurate synchronization remains challenging due to limitations in virtual model representation and operational uncertainties. This paper proposes a digital twin synchronization (DTS) method based on a bidirectional synchronization framework that enhances digital twins' ability to simulate physical behaviors and mitigate uncertainties during operation. A field implementation was conducted in actual building operations, applying the DTS method to a chilled water pump differential pressure control loop. The results show that the bidirectional approach outperforms conventional unidirectional synchronization by reducing sensor errors and model uncertainties and improving overall simulator reliability. The proposed DTS method enables more consistent and reliable digital twin operation by improving synchronization accuracy and reducing inconsistencies. The DTS approach reduced the digital twin simulator's overall MAPE from 5.32 % to 0.88 %, demonstrating its effectiveness in accurately replicating physical and control behaviors.
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