Lecture at the European Two-Phase Flow Group Meeting, München, June 10 to 13, 1986.
Article first published online: 2 FEB 2004
Copyright © 1987 VCH Verlagsgesellschaft mbH
Chemical Engineering & Technology
Volume 10, Issue 1, pages 217–224, 1987
How to Cite
Friedel, L. (1987), Desorption delay in gas/liquid systems during vessel top venting. Chem. Eng. Technol., 10: 217–224. doi: 10.1002/ceat.270100126
Dedicated to Prof. Dr. rer. nat. Heinz Harnisch on occasion of his 60th birthday
- Issue published online: 2 FEB 2004
- Article first published online: 2 FEB 2004
- Manuscript Received: 30 JUN 1986
During the sudden unheated vessel top venting of initially saturated two-component gas/liquid mixtures, in which the gas is also extensively dissolved in the non-evaporating liquid phase, a solubility inequilibrium develops between the phases; re-equilibration can set in only after a so-called desorption delay time. Laboratory measurements of this delay time were under-taken with model mixtures of CO2 and water and viscous aqueous (Newtonian) solutions by high speed cinematography. The parameters of the experiments are relief cross-section, initial liquid level, pressure, temperature, and concentration. The shortest deley time obtained lasts approximately 75 ms. It differs substantially from the minimum boiling delay time previously measured with various refrigerants in the same test facility. The experimental results are correlated by a semi-empirical dimensionless power relationship, which includes all independent primary design variables generally availble in a physically consistent interrelationship. Reasonable extrapolations to other test conditions and aqueous two-component systems with an acceptable accuracy systems can therefore be expected.