Large scale passive ventilation trials of hydrogen |
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| Affiliation: | 1. Department of Chemistry, Centre of Advanced Study, Faculty of Science, Banaras Hindu University, Varanasi 221005, India;2. Department of Chemical Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi 221005, India;1. Univ. Bordeaux, IMS, UMR 5218, Talence 33400, France;2. Andra, Châtenay-Malabry 92298, France;1. Boreskov Institute of Catalysis, Prosp. Akademika Lavrentieva 5, Novosibirsk 630090, Russia;2. Novosibirsk State University, Pirogova St. 2, Novosibirsk 630090, Russia;3. FSUE Krylov State Research Centre, Moskovskoye Shosse 44, St. Petersburg 196158, Russia;1. CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France;2. MEPHI (State University), 31 Kashirskoe shosse, Moscow 115409, Russian Federation;3. Aix-Marseille Université, PIIM, CNRS, UMR 7345, 13397 Marseille, France |
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| Abstract: | This paper describes the investigation of a passive ventilation solution to manage the hydrogen concentration within a large ullage space (0.9–3 m deep) above a liquid (free surface area of ∼40 m2) containing a hydrogen source. The aim of the ventilation is to maintain the hydrogen concentration within the ullage space below 25% of the Lower Explosive Limit (LEL). The programme of tests involved examination of the ventilation performance in terms of sensitivity to chimney position, hydrogen release rate, hydrogen release point, ullage height and chimney diameter.The tests carried out lasted many hours, and the hydrogen concentration was monitored at a number of points within the ullage space. Pairs of ventilation chimneys with associated instrumentation systems were used to control and monitor the hydrogen concentration within the ullage space.This paper describes the approach to the testing, the results obtained and their analysis. |
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| Keywords: | Hydrogen Passive ventilation Ullage Chimney Hydrogen release Hydrogen concentration |
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