Current publication of the CSE Center of Safety Excellence are listed below. Abstracts of major publications are attached below this list.
Journal of Loss Prevention in the Process Industries, Volume 41, May 2016, Pages 419–432
Sizing of rupture disks for two-phase gas/liquid flow according to HNE-CSE-model
Jürgen Schmidt, Sara Claramunt
Abstact see below.
Dechema Infobrief 05/2015
Das CSE Center of Safety Excellence – Kompetenzzentrum für Prozess- und Anlagensicherheit
Jürgen Schmidt
Technische Sicherheit 06/2016
Das CSE Center of Safety Excellence – Kompetenzzentrum für Prozess- und Anlagensicherheit
Jürgen Schmidt, Jens Denecke
Springer Verlag
Gwf Gas+Energie Im Profil Folge 45 06/2016
Das CSE Center of Safety Excellence – Kompetenzzentrum für Prozess- und Anlagensicherheit
Jürgen Schmidt, Jens Denecke
Abstracts of major publications:
Sizing of rupture disks for two-phase gas/liquid flow according to HNE-CSE-model
Jürgen Schmidt, Sara Claramunt
Industrial rupture disk vent line areas for two-phase flow are currently overestimated. As a consequence, the dischargeable mass flow rate is partially much higher than necessary often leading to malfunctions in downstream retention systems and increased environmental loads. For two-phase gas/liquid flow there is no standardized sizing procedure available. Hence, the homogeneous non-equilibrium model HNE-DS is transferred from sizing safety valves to a procedure for sizing rupture disk vent lines. Thermodynamic non-equilibrium effects like boiling delay are considered. The extend method is called HNE-CSE method.
Characteristic numbers of rupture disk vent lines like the resistance coefficient KR are typically measured under laboratory, subcritical conditions with incompressible fluids, i.e. liquids or gases at very low velocities. In contrast, the flow typically encountered in an industrial rupture disk vent line is a compressible gas or two-phase gas/liquid flow under critical flow conditions. The sizing of a rupture disk vent line based on characteristics for incompressible fluids is therefore a challenge. An appropriate test section for compressible fluids as an extension of ASME PTC25 is recommended. In addition the definition of the resistance coefficient is extended to compressible fluid flows.