Research on the dynamic pressure calculation model for high-pressure CO2 pipeline leakage
During the operation of high-pressure CO2 pipeline,leakage may occur due to factors such as corrosion or external damages.The complex phase state of CO2 makes the pipeline's pressure dynamic response particularly intricate.Understanding the dynamic change pattern of pressure within the pipeline is crucial for predicting decompression waves and arresting crack propagation due to the pipe's ductility.Based on the isentropic principle,a dynamic pressure calculation model for high-pressure CO2 pipeline leakage was developed and presented in this paper.The model was designed to study the pressure variation characteristics in the pipeline during pipeline leakage under different working conditions.To validate the model,it was tested against experimental data from industrial-scale CO2 pipeline leaks and the computational results from HYSYS software.The results show that,the prediction of pressure drop in high-pressure CO2 pipeline leakage process is more consistent with the experimental results compared with those from HYSYS software,with average prediction accuracy staying 3.9%error.This indicates that the model can accurately predict the dynamic pressure response in high-pressure CO2 pipeline leakage event.The research results can provide theoretical support for the prediction of dynamic decompression characteristics in the event of CO2 pipeline leakage.
High pressure CO2 pipelineCO2 pipeline leakageDynamic pressureCalculation model
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