国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

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.