Experimental Study of CO2 Releases from a Saturated Liquid Reservoir

Abstract

To improve the tools used in safety assessments for handling transport and storage of CO2 experimental results are used as a reference. The present study measures mass flux, temperature of the jet and particle sizes of a release from a liquid CO2 reservoir. In a release to the atmosphere from a liquid reservoir with a pressure of 6MPa and 293K, the jet formed consists of gas and solid particles. In the experiments the CO2 is released through nozzles of 0.25mm, 0.5mm, 1mm and 2.5mm diameters. Both high speed imaging and laser diffraction is used for particle characterization. The results show that the jet core temperature is 205K close to the release and increases after 100 diameters. The measured mass flux decreases with increasing nozzle diameter. The average mass flux is 38g/s. mm2. The high speed imaging shows particle sizes of 20-80μm with velocities up to 100 m/s at the edges of the jet. It was not possible to measure particles in the jet core with high speed imaging. The laser diffraction experiments show a clear particle size concentration of about 1μm.