| 摘要: |
| 天然气能量计量系统的分析偏差的分布范围即为其不确定度。在利用标准气体混合物(RGM)溯源的过程中,并没有对单个分析数据进行验证,而只是在特定的组成范围内以规定的分析程序,对大量不同组成的样品气进行验证。因此,为保证分析结果的可靠性和准确性,必须用化学计量学的方法进行模拟验证。Monte-Carlo模拟(验证)结果表明,由英国管网输送的商品天然气,当其中CH4摩尔分数在78%～98%范围内变化时,商品天然气高位发热量测量的分析偏差及其不确定度均符合有关法规和标准的要求。 |
| 关键词: 天然气 能量计量 分析偏差 不确定度 Monte-Carlo模拟 |
| DOI： |
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| Uncertainty evaluation of analytical bias for on-line gas chromatograph |
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Chen Gengliang
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Research Institute of Natural Gas Technology,PetroChina Southwest Oil & Gasfield Company,Chengdu 610213,Sichuan,China
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| Abstract: |
| The distribution range of analytical bias in energy determination systems is that of its uncertainty.In the process of establishing traceability by reference gas mixture(RGM),individual results do not invalidate and large number of samples of different composition are only invalidated by a specified procedure in certain composition range.For guaranteeing reliability and accuracy of analytical results,methods of chemometrics must be used in simulation of validation. Results of Monte Carlo simulation(MCM) demonstrated that analytical bias and uncertainty of gross heating value can meet the requirements of British regulation and standard,when methane content in natural gas grid system is that of 78%～98%. |
| Key words: natural gas energy determination analytical bias uncertainty Monte Carlo simulation(MCM) |
