Hydrogen Wide Area Monitoring of LH2 Releases at HSE for the PRESHLY Project

William Buttner, Tashi Wischmeyer, Jonathan Hall, Simon Coldrick, Phil Hooker, Jacob Thorson

Research output: Contribution to conferencePaper


The characterization of liquid hydrogen (LH2) releases has been identified as an international research priority to expand the safe use of hydrogen as an energy carrier. Empirical field measurements such as those afforded by Hydrogen Wide Area Monitoring (HyWAM) can elucidate the behavior of LH2 releases, which can then be used to support and validate dispersion models. HyWAM can be defined as the quantitative three-dimensional spatial and temporal profiling of planned or unintentional hydrogen releases. The NREL Sensor Laboratory developed a HyWAM based upon a distributed array of hydrogen Sensors. The NREL Sensor Laboratory and Health and Safety Executive (HSE) formally committed to collaborate on profiling GH2 and LH2 releases, which allowed for the integration of the NREL HyWAM into the HSE LH2 release behavior investigation supported by the FCH JU Prenormative Research for the Safe Use of Liquid Hydrogen (PRESLHY) program. A HyWAM system consisting of 32 hydrogen measurement points and co-located temperature sensors were distributed downstream of the LH2 release apparatus developed by HSE. In addition, there were proximal wind and weather monitors. In a separate presentation at this conference "HSE SD Experimental Summary for the Characterisation, Dispersion and Electrostatic Hazards of LH2 for the PRESLHY Project" HSE researchers summarize the experimental apparatus and experimental protocols utilized in the HSE LH2 releases that were performed under the auspices of PRESLHY. To supplement the HSE presentation, this presentation will focus on the spatial and temporal behavior LH2 releases as measured by the NREL HyWAM. Correlations to ambient conditions, such as wind speed and direction, plume temperature and hydrogen concentrations will be discussed in addition to the design and performance of the NREL HyWAM, and its potential for improving hydrogen facility safety.
Original languageAmerican English
Number of pages12
StatePublished - 2021
EventICHS 2021: International Conference on Hydrogen Safety - Edinburgh, Scotland
Duration: 21 Sep 202124 Sep 2021


ConferenceICHS 2021: International Conference on Hydrogen Safety
CityEdinburgh, Scotland

NREL Publication Number

  • NREL/CP-5700-80063


  • hydrogen sensor
  • Hydrogen Wide Area Monitoring
  • HyWAM
  • liquid hydrogen


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