天然气热值测量的量热法分析

Andrij Motalo, V. Motalo
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摘要

本文讨论了目前天然气热值的测量方法,这些方法在最新的天然气计量中是有效的。分析了用量热法测定天然气毛比热值和净比热值的方法。结果表明,为提高测量结果的准确性和有效性,应对至少5个被测气体样品进行测定毛比热和净比热的实验。在考虑随机和系统影响因素的情况下,通过对测量结果的不确定度进行估计,提出了一种用量热法测量天然气总比热值和净比热值的精度估计方法。为实际实施该方法,已编制了测量天然气的总和净体积基热值的不确定性预算。本文给出了某天然气田样品的实验研究结果,得到了以总体积和净体积为基础的比热的客观值,并给出了扩展不确定度的估计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
ANALYSIS OF CALORIMETRIC METHOD OF MEASUREMENT OF NATURAL GAS CALORIFIC VALUE
The article considers the current methods of measuring the calorific value of natural gas which are valid in the upto-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 volumebasis-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 volumebasis specific calorific with estimates of extended uncertainty are obtained.
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