Calculating overpressure from BLEVE explosions

Using liquid superheating energy for a quick estimation of overpressure in BLEVEs and similar explosions

“…The procedure described by Planas et al [6] was applied. In the first case, the energy of the final state was calculated for a state defined by the atmospheric pressure and entropy equal to that of the initial state.…”

A new procedure to estimate BLEVE overpressure

“…For all the scenarios, the mechanical energy per m 3 of vessel volume was determined by assuming real gas behaviour and adiabatic irreversible expansion, according to the methodology proposed by Planas et al (2004). The required thermodynamic data were obtained from NIST Reference Fluid Properties, Version 9.1 (Lemmon et al, 2007).…”

“…We also add the comparison of the original real gas behaviour and adiabatic irreversible expansion (RAIE) method proposed by Planas et al (2004) (first column of Table 4) with the same set of experimental values. The resulting overpressures at different distances corresponding to each method were obtained from the TNT equivalent mass and the well-known plot of the scaled distance vs. peak overpressure for TNT.…”

“… Constant volume energy addition (Brode, 1959)  Real gas behaviour and isentropic expansion (CCPS, 2010)  Isothermal expansion (Smith et al, 1996)  Thermodynamic availability (Crowl, 1991(Crowl, , 1992  Ideal gas behaviour and isentropic expansion (Prugh, 1991)  Real gas behaviour and adiabatic irreversible expansion (Planas et al, 2004;Casal and Salla, 2006) Comparative analysis show that all methodologies tend to provide conservative (i.e. high) results, except those based on real gas behaviour and adiabatic irreversible expansion, which give values that are less conservative but more realistic (Bubbico and Marchini, 2008;Laboureur et al, 2014;Hemmatian et al, 2017).…”

Safety study of an experimental apparatus for extraction with supercritical CO2

“…There are many ways to estimate the energy released in a BLEVE (Abbasi and Abbasi, 2007;Planas-Cuchi et al, 2004). One possibility is to assume that the vapor behaves as an ideal gas and that the vapor expansion is adiabatic and reversible (Prugh, 1991).…”