摘要
天然气的密度通常采用气相色谱分析方法得到。分析了这种方法计算密度结果的不确定度,并与SY/T6143《天然气流量的标准孔板计量方法》中经验公式计算的密度不确定度进行比较。结果表明:按照SY/T 6143标准计算的密度不确定度与天然气压力和温度有关,而采用气相色谱分析方法计算的密度结果的不确定度仅与天然气组分含量有关;SY/T 6143标准所计算的密度不确定度结果更可靠些。
The density of natural gas is ususlly analyzed by gas chromatography. In this paper, the uncertainty of this method was calculated and comparied with that of empirical formula in SY/T 6143. The results showed that the density uncertainty calculated by SY/T 6143 is related to gas pressure and temperature, and the uncertainty calculated by gas chromatography is related to the gas components. The density uncertainty calculated by SY/T 6143 is more reliable.
出处
《化学分析计量》
CAS
2010年第5期14-17,共4页
Chemical Analysis And Meterage
关键词
天然气
密度计算
不确定度
分析比较
natural gas, density calculation, uncertainty, comparison and analysis
