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Validering av KFX för vätgasjetflammor som träffar ytor

Nilsson, Jonathan LU (2024) In 5710 VBRM10 20232
Division of Fire Safety Engineering
Abstract
Regarding climate change and the future need för renewable energy, hydrogen is considered to be an important component in energy storage systems. However, the use of hydrogen is fraught with risk due to its chemical properties. This thesis deals with the problem of modelling heat transfer from hydrogen jet flames hitting surfaces. This paper aims to assess how well KFX reproduces results of hydrogen jet flames hitting surfaces. The simulations in KFX are based on data from experiments conducted by Merander et al. (n.d).

KFX is a CFD-code developed by DNV to analyse the safety of situations with fire risks, such as jet fires, mostly offshore. The consequences that were investigated are the temperature of surfaces and radiation levels at... (More)
Regarding climate change and the future need för renewable energy, hydrogen is considered to be an important component in energy storage systems. However, the use of hydrogen is fraught with risk due to its chemical properties. This thesis deals with the problem of modelling heat transfer from hydrogen jet flames hitting surfaces. This paper aims to assess how well KFX reproduces results of hydrogen jet flames hitting surfaces. The simulations in KFX are based on data from experiments conducted by Merander et al. (n.d).

KFX is a CFD-code developed by DNV to analyse the safety of situations with fire risks, such as jet fires, mostly offshore. The consequences that were investigated are the temperature of surfaces and radiation levels at specific measurement points. A total of six simulations were performed, of which the results were compared with each respective experiment. For each case, the angle of the jet flame was varied, horizontally and at an angle of 45˚ (downwards). In addition, the experiments were based on three different geometries with a variation in the level of confinement: one plate, two plates and five plates. The results showed that KFX reproduces results well for the least confined cases (one plate) of the cases in terms of surface temperature. However, in terms of radiation, KFX reproduced good results for two other cases. Due to the irregular results, KFX cannot be considered validated for the heat transfer from hydrogen flames based on the results from this study.

Furthermore, a sensitive analysis was performed which showed that the results were not sensitive based on the selected parameters. The parameter that resulted in the greatest variation was the conductivity of the insulation. (Less)
Please use this url to cite or link to this publication:
author
Nilsson, Jonathan LU
supervisor
organization
alternative title
Validation of KFX for hydrogen jet flames that hits surfaces
course
VBRM10 20232
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Kameleon FireEX, KFX, CFD, Hydrogen Jetfire
publication/series
5710
report number
5710
other publication id
LUTVDG/TVBB-5710-SE
language
Swedish
id
9145199
date added to LUP
2024-01-25 12:39:29
date last changed
2024-01-25 12:39:29
@misc{9145199,
  abstract     = {{Regarding climate change and the future need för renewable energy, hydrogen is considered to be an important component in energy storage systems. However, the use of hydrogen is fraught with risk due to its chemical properties. This thesis deals with the problem of modelling heat transfer from hydrogen jet flames hitting surfaces. This paper aims to assess how well KFX reproduces results of hydrogen jet flames hitting surfaces. The simulations in KFX are based on data from experiments conducted by Merander et al. (n.d).

KFX is a CFD-code developed by DNV to analyse the safety of situations with fire risks, such as jet fires, mostly offshore. The consequences that were investigated are the temperature of surfaces and radiation levels at specific measurement points. A total of six simulations were performed, of which the results were compared with each respective experiment. For each case, the angle of the jet flame was varied, horizontally and at an angle of 45˚ (downwards). In addition, the experiments were based on three different geometries with a variation in the level of confinement: one plate, two plates and five plates. The results showed that KFX reproduces results well for the least confined cases (one plate) of the cases in terms of surface temperature. However, in terms of radiation, KFX reproduced good results for two other cases. Due to the irregular results, KFX cannot be considered validated for the heat transfer from hydrogen flames based on the results from this study. 

Furthermore, a sensitive analysis was performed which showed that the results were not sensitive based on the selected parameters. The parameter that resulted in the greatest variation was the conductivity of the insulation.}},
  author       = {{Nilsson, Jonathan}},
  language     = {{swe}},
  note         = {{Student Paper}},
  series       = {{5710}},
  title        = {{Validering av KFX för vätgasjetflammor som träffar ytor}},
  year         = {{2024}},
}