Skip to main content

LUP Student Papers

LUND UNIVERSITY LIBRARIES

Validering av FDS för simulering av mindre vätgasläckage inomhus

Hamnes Alavei, Emil LU and Andersson, Erik (2023) In LUTVDG/TVBB VBRM10 20231
Division of Fire Safety Engineering
Abstract
The prevailing global climate transition is incentivized to occur in a short period of time. Hydrogen is considered a pivotal element towards a renewable energy system. However, the physical and chemical properties of hydrogen give rise to the risk of fire and explosion. This risk must be evaluated as hydrogen becomes increasingly integrated into society. This paper aims to investigate whether the
Computational Fluid Dynamics (CFD) program FDS can be utilized to dimension the natural ventilation of minor hydrogen leaks. Experimental data was generated to provide validation, which was subsequently compared to simulated data produced by FDS.

The results demonstrate that the Computational Fluid Dynamics (CFD) program FDS is capable of... (More)
The prevailing global climate transition is incentivized to occur in a short period of time. Hydrogen is considered a pivotal element towards a renewable energy system. However, the physical and chemical properties of hydrogen give rise to the risk of fire and explosion. This risk must be evaluated as hydrogen becomes increasingly integrated into society. This paper aims to investigate whether the
Computational Fluid Dynamics (CFD) program FDS can be utilized to dimension the natural ventilation of minor hydrogen leaks. Experimental data was generated to provide validation, which was subsequently compared to simulated data produced by FDS.

The results demonstrate that the Computational Fluid Dynamics (CFD) program FDS is capable of dimensioning natural ventilation for emissions with larger opening sizes, resulting in lower velocities. Under the applied ventilation conditions, FDS tends to overestimate the concentration level, which appears to act as a safety margin. Additionally, the results establish that the precision in concentration measurements produced by FDS increases with larger ventilation areas. For emissions with smaller opening sizes that generate higher velocities, the FDS model encounters difficulties in computing representative values (Less)
Please use this url to cite or link to this publication:
author
Hamnes Alavei, Emil LU and Andersson, Erik
supervisor
organization
course
VBRM10 20231
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Hydrogen, Helium, Ventilation, CFD, FDS
publication/series
LUTVDG/TVBB
report number
5692
other publication id
LUTVDG/TVBB--5692--SE
language
Swedish
id
9114348
date added to LUP
2023-05-17 08:22:08
date last changed
2023-05-17 08:22:08
@misc{9114348,
  abstract     = {{The prevailing global climate transition is incentivized to occur in a short period of time. Hydrogen is considered a pivotal element towards a renewable energy system. However, the physical and chemical properties of hydrogen give rise to the risk of fire and explosion. This risk must be evaluated as hydrogen becomes increasingly integrated into society. This paper aims to investigate whether the 
Computational Fluid Dynamics (CFD) program FDS can be utilized to dimension the natural ventilation of minor hydrogen leaks. Experimental data was generated to provide validation, which was subsequently compared to simulated data produced by FDS.

The results demonstrate that the Computational Fluid Dynamics (CFD) program FDS is capable of dimensioning natural ventilation for emissions with larger opening sizes, resulting in lower velocities. Under the applied ventilation conditions, FDS tends to overestimate the concentration level, which appears to act as a safety margin. Additionally, the results establish that the precision in concentration measurements produced by FDS increases with larger ventilation areas. For emissions with smaller opening sizes that generate higher velocities, the FDS model encounters difficulties in computing representative values}},
  author       = {{Hamnes Alavei, Emil and Andersson, Erik}},
  language     = {{swe}},
  note         = {{Student Paper}},
  series       = {{LUTVDG/TVBB}},
  title        = {{Validering av FDS för simulering av mindre vätgasläckage inomhus}},
  year         = {{2023}},
}