对ISO技术报告TR 24094的几点认识——兼论能量计量的不确定度评价

从天然气能量计量涉及的3种测量方法:流量测量、热量计测定发热量和气相色谱法测定组成,分别讨论了它们的溯源性;并指出对后2种测量方法我国目前尚未建立完善的溯源链,ISO标准体系中若干有关天然气分析的溯源准则及称量法制备标准气混合物的重要标准也尚未转化为我国国家标准。为了满足GB/T 18603中对A级站天然气能量计量的不确定度要求,对有关科研和标准化工作提出了若干建议。

Opinions on ISO Technical Report TR24094——Discussions on the Indeterminacy Evaluation of Energy Measurement

The energy measurement of natural gas involves three measuring methods: flow measurement, calorimeter determination for calorific value and gas chromatogram method. According to the composition of these methods, the traceabilities of them are discussed respectively. Meanwhile, it is pointed out that the last two methods have not established perfect traceablity chain in China so far, and that traceablity norms about natural gas analysis, weighing preparation standards and important standards of gas mixtures in ISO standard system haven't been transformed into Chinese national standards either. In order to meet the indeterminacy demands of natural gas energy measurement at the stations ranked A in GB/T 18603, some suggestions are put forward about relevant scientific research and standardization.