Cool Fuel — Hydrogen’s Massive Sensing Challenges
jacob.leachmanThis is a pre-print of my bi-monthly column ‘Cool Fuel’ for Cold Facts, the magazine of the Cryogenics Society of America.
I had a realization the other day – most of us may be incorrectly measuring cryogenic hydrogen mass flows. Nearly all types of flow meters are affected: pressure-differential, sonic, thermal, etc. The differences arise from changing thermophysical properties of hydrogen at cryogenic temperatures and more complicated for flow metering than just adjusting for temperature and pressure. Hydrogen at room temperature sourced from a cryogenic dewar can also be affected, which covers the majority of hydrogen use. In response, this column covers the basics … » More …