On the causes for the differences between the natural gas volumes measured by the metering systems of a gas distribution campany and of a gas consumer

Abstract:

This paper presents the methodology used, the checked items and the results obtained in an investigation carried out to identify the causes that generated substantial differences between the natural gas volumes measured by two measuring systems, one from a gas distribution company and another from its industrial consumer, both installed in series in a gas pipeline. The investigation showed that the measurement of the volume of gas performed by the gas distributor metering system was curiously influenced by an erroneous measurement of the gas temperature since it was affected by a complex thermodynamic process involving first a cooling step due to the Joule-Thomson effect caused by a pressure reducing valve, and following that, the gas heating as a result of the heat exchange with the pipe walls.


Reference:
KAWAKITA, Kazuto; TELLES, Rubens Silva. On the causes for the differences between the natural gas volumes measured by the metering systems of a gas distribution campany and of a gas consumer. In: RIO PIPELINE CONFERENCE & EXPOSITION, 2015, Rio de Janeiro. Proceedings.. IBP 1236_15. 

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