The aim of this work (Metrology for Advanced Hydrogen Storage Solutions – MefHySto 19ENG03) is to address the need for the assessment of the quality of hydrogen produced from PEM water electrolysis during rapidly imposed transient use periods. This work focuses on quality measurements with online gas analysers for two key impurities in hydrogen (water vapour and oxygen).
In order to meet this need, new metrology to test the response time of online instrumentation used for the measurement of water vapour and oxygen in hydrogen produced from PEM water electrolysers was developed. The metrology requires the ability to generate fast changes (of a few or tens of seconds – i.e. the timescale of surges in electricity demand and supply 0–100 %, 200 % peak) in the amounts of these key impurities, to test the response times of the instruments tested.
The online gas analysers for measuring water vapour and oxygen in hydrogen, were then evaluated using this new metrology. This report presents the validation results and discusses the findings.
Report on the development of new metrology for the measurement of key impurities in hydrogen (including water vapour and oxygen) produced from PEM water electrolysers, with fast response times of a few or tens of seconds
