燃气热值计量标准的尾气收集装置精度设计

Accuracy Design of Exhaust Gas Collecting Device about Gas Caloricity Gaging

摘要:

针对基于燃烧法的燃气热值计量标准的尾气收集装置的缸体容积精确测量问题,应用现代仪器精度与误差理论,对该尾气收集装置的各项误差源进行分析,得到各分量的传递系数表达式,并按工程实际情况对精度指标进行了分配与调整;对分配的精度指标进行了合成计算,结果表明所设计的燃气热值计量尾气收集装置的最大允许误差为0.24％,完全满足尾气体积的测量精度要求;论文研究对建立我国新一代天然气热值计量标准有很好的指导意义和工程实用前景。

Abstract:

Aiming at the problem of accurate measurement of cylinder volume of the exhaust gas collection device based on the combustion method of gas calorific value measurement standard,the error sources of the tail gas collecting device are analyzed and the expression of the transfer coefficient is obtained by using the modern instrument precision and error theory,and according to the actual situation of the project,the accuracy index is allocated and adjusted. Index distribution accuracy is synthesized. The results show the designed maximum permissible error calorific value of gas metering exhaust collector means 0.59%,to fully meet the requirements of exhaust gas volume measurement accuracy. Thesis has a good guide for the establishment of the new generation of natural gas calorific value measurement standards,and has a good prospect of engineering application.