Detailed information on methods used to measure flow from CNG fuel dispensers is provided herein, as are tips for ensuring measurement accuracy. Information is also provided on the variation in compositional makeup of natural gas delivered for NGV applications. It is demonstrated how natural gas quality varies from region to region in the U.S., particularly when the gas is produced from the various shale plays. NGV performance can vary as a function of the gas quality, hence, guidance is provided on ways that CNG fueling stations can help deal with variations in gas composition.
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