Abstract
The COSHER joint industry project involved the conduct of large scale experiments to provide release and dispersion data under well-defined conditions, studying the full bore rupture of a CO2 dense phase high pressure underground pipeline at large scale. The data generated are useful for model development and validation as well as for better understanding of the risks due to large scale underground CO2 pipeline ruptures. In order to simulate the depressurization of a pipeline, a 219.1mm diameter pipeline loop was fed from both ends by a 148m3 reservoir of CO2. The rig was designed to promote outflow in the liquid phase for as long as possible. About 136ton of CO2 were released in 204s. During the experiments, measurements of the fluid pressure, fluid temperature and wall temperature of the test facility were made together with measurements of the CO2 concentration contours and temperature within the dispersing gas cloud.
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