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Humidity Standard of Compressed Hydrogen for Fuel Cell Technology
Published
Author(s)
Peter H. Huang
Abstract
Compressed hydrogen is one of the most important utilities in fuel cell industry. For the specification of hydrogen fuel quality and for the design of humidification equipment, knowledge of the equilibrium water content of hydrogen as a function of temperature and pressure is desirable. A simple presentation in chart form is usually adequate for most fuel cell applications and such a chart has been prepared based on the information on the water vapor content of a hydrogen-water mixture. Absolute humidity of grams of water vapor per kilogram of dry hydrogen is plotted as a function of pressure up to 1000 atmospheric pressures for various dew/frost-point temperatures in the range of -70 degree sign}C to 90 degree sign}C. The chart can be used directly to determine the water vapor concentration of compressed hydrogen, the dew/frost- point of such hydrogen-water vapor mixture when pressure is reduced to a lower pressure, usually one atmospheric pressure.
Huang, P.
(2008),
Humidity Standard of Compressed Hydrogen for Fuel Cell Technology, ECS Transactions, San Antonio, TX, US, [online], https://doi.org/10.1149/1.2921574, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=901578
(Accessed October 14, 2025)