Hydrogen

Hydrogen is very different from conventional fuels, and safe handling of hydrogen requires proper understanding and often alternative mitigation strategies. In our experience, it is wise to involve expertise early, this may limit the need for major and costly changes late in a project. At early stage, dedicated spreadsheet consequence models can give immediate input on risk/hazards, while at a later stage, some of the assessments will be performed using CFD for more accurate predictions. Explosion risk is a main focus when handling hydrogen. Our assessments provide detailed insight in consequences of phenomena like LH2-vapour dispersion, high pressure tank burst, and DDT/detonation, all highly relevant for hydrogen but challenging to model.

Published works:
Hansen, O. R., Hansen, E. S. (2023). CFD-modelling of large-scale LH2 release and explosion experiments.
Hansen, O. R., Hansen, E. S., Kjellander, M. T., Martini, R. (2022). CFD study to assess safety aspects of TPRD releases from heavy-duty hydrogen vehicles and trains in tunnels.
Hansen, O. R. (2020). Liquid hydrogen releases show dense gas behavior.
Aarskog, F. G., Hansen, O. R., Strømgren, T., Ulleberg, Ø. (2020). Concept risk assessment of a hydrogen driven high speed passenger ferry.
Hansen, O. R. (2019). Hydrogen infrastructure - efficient risk assessment and design optimization approach.
Middha, P, Engel, D., Hansen, O.R. (2011). Can the addition of hydrogen to natural gas reduce the explosion risk?
Middha, P, Engel, D., Hansen, O.R., Grune, J., Kotchourko, A. (2011). CFD calculations of gas leak dispersion and subsequent gas explosions: Validation against ignited impinging hydrogen jet experiments.
García, J., Baraldi, D., Gallegoa, E., Beccantini, A., Crespoa, A., Hansen, O. R., Høiset, S., Kotchourko, A., Makarov, D., Migoya, E., Molkov, V., Voort, M. M., Yanez, J.. (2010). An intercomparison exercise on the capabilities of CFD models to reproduce a large-scale hydrogen deflagration in open atmosphere
Middha, P, Hansen, O.R., Storvik, I. E. (2009). Validation of CFD-model for hydrogen dispersion.
Venetsanos, A. G., Papanikolaou, E., Delichatsios, M., Garcia, J., Hansen, O. R., Heitsch, M., Huser, A., Jahn, W., Jordan, T., Lacome, J.-M., Ledin, H. S., Makarov, D., Middha, P., Studer, E., Tchouvelev, A. V., Teodorczyk, A., Verbecke, F., Van der Voort, M. M. (2009). An inter-comparison exercise on the capabilities of CFD models to predict the short and long term distribution and mixing of hydrogen in a garage.
Middha, P, Hansen, O.R. (2009). CFD simulation study to investigate the risk from hydrogen vehicles in tunnels.
Middha, P, Hansen, O.R., Schneider, H. (2007). Deflagration to detonation transition (DDT) in jet ignited hydrogen-air mixtures: large scale experiments and FLACS CFD predictions.
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