Вимірювальна техніка та метрологія. – 2021. – Випуск 82, №3

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Measuring Equipment and Metrology : scientific journal. – Lviv : Lviv Politechnic Publishing House, 2021. – Volume 82, № 3. – 52 р.

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Analysis of calorimetric method of measurement of natural gas calorific value
(Lviv Politechnic Publishing House, 2021) Motalo Andriy; Motalo Vasyl
The article considers the current methods of measuring the calorific value of natural gas which are valid in the up to-date gasometry. The procedure for measuring the gross and net volume-basis specific calorific value of natural gas by the calorimetric method is analyzed. It is shown that to increase the accuracy and validity of measurement results, the experiment to determine the values of gross and net volume-basis specific calorific should be performed for at least 5 samples of the investigated gas. A methodology for estimating the accuracy of measuring the gross and net volume-basis specific calorific values of natural gas by the calorimetric method by finding estimates of the uncertainty of the obtained measurement results taking into account both random and systematic influencing factors are developed. The uncertainty budgets for measuring the gross and net volume basis-specific calorific values of natural gas have been developed for the practical implementation of the methodology. The results of experimental studies of samples of one of the natural gas fields are given and the objective values of the gross and net volume basis specific calorific with estimates of extended uncertainty are obtained.