Abstract The paper presents a mathematical model for predicting outflow rates from a ruptured pipeline transporting compressed volatile liquids. The main focus of the paper is the methodology used to predict thermodynamic properties of interest. The model is validated using experimental data in the open literature. As the field scale outflow data does not include typical operating conditions the model is further validated at higher pressures and longer pipelines by comparing outflow rates calculated using a commercial pipeline simulation package, PROFES. The mathematical model predictions of mass flow rate and pipeline inventory agree well with the measured data and the more sophisticated pipeline model. The simple pipeline rupture model is a useful tool for consequence analysis as it has a fast runtime on a standard PC. A further advantage is it is more easily, without having to address all of the numerical issues that arise when using a more sophisticated pipeline model. This allows a safety engineer to focus on the potential hazard rather than driving the model.
[1]
L. Friedel,et al.
Impact of the reproduction accuracy of the fluid properties on formulations of the homogeneous equilibrium critical mass flow rate model
,
1997
.
[2]
V.H.Y. Tam,et al.
Simple transient release rate models for releases of pressurised liquid petroleum gas from pipelines
,
1990
.
[3]
William H. Press,et al.
Numerical Recipes: FORTRAN
,
1988
.
[4]
P. Cumber.
Vessel outflow sensitivity to composition
,
2002
.
[5]
R. Reid,et al.
The Properties of Gases and Liquids
,
1977
.
[6]
H. Fauske.
CONTRIBUTION TO THE THEORY OF TWO-PHASE, ONE-COMPONENT CRITICAL FLOW
,
1962
.
[7]
Brent R. Young,et al.
A Real-Time Approach to Process Control
,
2000
.
[8]
G. Saville,et al.
Blowdown of LPG Pipelines
,
1996
.
[9]
K. R. Brobst,et al.
An improved correlation for densities of compressed liquids and liquid mixtures
,
1982
.