DBPapers
DOI: 10.5593/SGEM2014/B21/S7.006

ASSESSING THE SAFETY LEVEL OF TECHNICAL EQUIPMENT OPERATING IN POTENTIALLY EXPLOSIVE ATMOSPHERES BY USING COMPUTER MODELLING

V. M. Pasculescu, S. M. Radu, E. Ghicioi, D. Pasculescu, T. Niculescu
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-10-0 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 1, 43-50 pp

ABSTRACT
In technological installations from the oil and gas industries used for the extraction, processing, storage or delivery of flammable substances, there may occur explosive atmospheres. An explosion, followed or not by a fire is a destructive phenomenon with major social and economic involvements, especially for the current technologies. It is a complex phenomenon with unpredictable evolution which includes chemical and physical processes such as burning reactions, heat transfer, flame formation, exchange of gases with the environment, structural transformation of building materials and resistance elements. In any work system, but especially in the oil and gas industry, the explosion risk factors are gases, vapors, mists, flammable aerosols, which through air dispersion may generate flammable mixtures. Explosive mixtures overlapping in time with an efficient ignition source generate explosions. Within the occupational health and safety, the explosion risk assessment has as main purpose to generate measures for preventing and limiting the effects of the explosions. For carrying out the explosion risk assessment, several steps are required, one of them being the classification of hazardous areas. In order to avoid the occurrence of an explosive atmosphere, there has to be prevented the release of flammable materials from their storage or processing system and to be insulated from the outside air. In installations from the gas industry technical equipment may be considered release sources. This paper aims to use modern CFD techniques for modelling several types of technical equipment which may be considered release sources within a gas drying installation. These models will be split into finite volumes, the so called mesh, which is the second part of the CFD analysis to be carried out. In future researches, the designed and meshed geometries will be used for estimating the gas release rate for several scenarios.

Keywords: CFD, explosive atmosphere, modelling, safety level, technical equipment

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