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Title: Hydrogen Field Test Standard: Laboratory Performance
Author: Jodie G. Pope John D. Wright
Source: 2015 International Symposium on Fluid Flow Measurement
Year Published: 2015
Abstract: The National Institute of Standards and Technology (NIST) developed a prototype field test standard (FTS) that incorporates three test methods that could be used by state weights and measures inspectors to periodically test retail hydrogen dispensers, much as gasoline dispensers are tested today. The three field test methods are: 1) gravimetric, 2) Pressure, Volume, Temperature ( PVT ), and 3) master meter. The FTS was tested in NISTs Transient Flow Facility with helium gas. All three methods agree within the expected uncertainty of 0.57 % for all test drafts of helium gas in the laboratory setting. The time required to perform six test drafts is similar for all three methods, ranging from 5.8 h for the gravimetric method to 7.5 h for the PVT method. The estimated cost of equipment to perform each method ranges from 18K ( PVT method) to 29K (master meter method).

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