(22c) Getting It Right for Projects in Early Design Phase: Advanced Techniques to Ensure Accurate Explosion Assessments
- Conference: AIChE Spring Meeting and Global Congress on Process Safety
- Year: 2018
- Proceeding: 2018 Spring Meeting and 14th Global Congress on Process Safety
- Group: Global Congress on Process Safety
- Time: Monday, April 23, 2018 - 2:30pm-3:00pm
Gexcon has evaluated traditional congestion parameters such as volume blockage ratio, surface area to volume ratio and packing density as indicators of predicted overpressure as they are commonly used for explosion siting studies. On their own, these parameters have not proven reliable indicators of predicted overpressure and shown no direct correlation to predicted overpressure across varying geometries. The lack of a direct relationship makes assessing the amount of required congestion to be added to early design phase models challenging. This study will focus on evaluating alternative ways of quantifying congestion, such as non-dimensional congestion parameters, row spacing and special obstruction density gradients, to evaluate combustion and eddy/turbulence decay downstream of obstructed areas. With these alternative parameters, we have further refined our anticipated congestion method (ACM) for petrochemical facilities for accurate predictions of explosion consequences with early design phase models (concept or FEED phase). This methodology will define what levels of anticipated congestion are necessary to supplement CAD models in early design phase to ensure accurate assessment of explosion hazards and include recommendations for required congestion level for supplementing early phase designs.
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