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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

MODELLING OF EFFICIENCY OF THERMAL EXPLOSIONS OCCURRING IN DIFFERENT CONDITIONS

Get access (open in a dialog) DOI: 10.1615/IHTC11.330
pages 193-198

Resumo

This work was undertaken as part of an investigation of thermal explosions, occurring occasionally under specific conditions, when two liquids of different volatility, are mixed.
The 'thermal explosion efficiency coefficient' is used for the determination of the fraction of thermal energy initially available in hot liquid (less volatile, called 'fuel') which is converted inte-destructive mechanical energy by the expansion of the colder liquid (volatile, called 'coolant"). This coefficient represents the destructive potential and can be determined for each possible outcome of these liquids mixing. It has its highest value only when all crucial stages of thermal explosion, presented in the form of an 'event' tree, take place.
The modelling approach presented in this study is based on a mechanistic and thermodynamic analysis. It is concerned mainly with the estimation of vapour explosion efficiency for the case represented by the bottom branch of the event tree. The niodel is applied to different pairs of fuel and coolant liquids - characteristic for nuclear, metallurgical and liquefied gas industries.