Effect of Mechanical Ventilation on Accidental Hydrogen Releases—Large-Scale Experiments

Agnieszka W. Lach and André V. Gaathaug
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Agnieszka W. Lach: Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Faculty of Technology, Natural Science and Maritime Science, Campus Porsgrunn, 3918 Porsgrunn, Norway
André V. Gaathaug: Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Faculty of Technology, Natural Science and Maritime Science, Campus Porsgrunn, 3918 Porsgrunn, Norway

Energies, 2021, vol. 14, issue 11, 1-13

Abstract: This paper presents a series of experiments on the effectiveness of existing mechanical ventilation systems during accidental hydrogen releases in confined spaces, such as underground garages. The purpose was to find the mass flow rate limit, hence the TPRD diameter limit, that will not require a change in the ventilation system. The experiments were performed in a 40 ft ISO container in Norway, and hydrogen gas was used in all experiments. The forced ventilation system was installed with a standard 315 mm diameter outlet. The ventilation parameters during the investigation were British Standard with 10 ACH and British Standard with 6 ACH. The hydrogen releases were obtained through 0.5 mm and 1 mm nozzles from different hydrogen reservoir pressures. Both types of mass flow, constant and blowdown, were included in the experimental matrix. The analysis of the hydrogen concentration of the created hydrogen cloud in the container shows the influence of the forced ventilation on hydrogen releases, together with TPRD diameter and reservoir pressure. The generated experimental data will be used to validate a CFD model in the next step.

Keywords: hydrogen safety; dispersion; mechanical ventilation; ACH; large-scale experiments (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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