Humidity Standard of Compressed Hydrogen for Fuel Cell Technology

Published

May 2, 2008

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.

Proceedings Title

ECS Transactions

Volume

12

Issue

1

Conference Dates

October 15-19, 2007

Conference Location

San Antonio, TX, US

Conference Title

2007 Fuel Cell Seminar and Exposition

Pub Type

Conferences

Download Paper

https://doi.org/10.1149/1.2921574

Local Download

Keywords

Compressed gas, humidity, hydrogen, second virial coefficient, uncertainty

Citation

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)