Current situation and discussion of manual monitoring methods of flue gas velocity and flow rate
Under the background of carbon peak and carbon neutrality,the standard method of manual determination of flue gas velocity and volume flow rate,as a reference method,urgently needs to be improved,while the requirements of carbon emission monitoring and measurement accuracy are raised in China.In this case,the current situation of manual monitoring methods were reviewed,including the requirements of measurement sites,layout of measurement points and determination methods,on the basis of which the current problems and improvement direction of monitoring methods in China were proposed.In terms of measurement sites,standards from various countries have specific requirements for the distance between the measurement site and the flow disturbance,but there are certain differences in details.Compared with American,European,and ISO standards,Chinese standards lack specific rules of verification of airflow direction and flow field homogeneity.In terms of measurement points,the method for determining the number of measurement points in standards of the United States differs greatly from standards of other countries,while Chinese standards are similar to European and ISO standards.The layout methods of measurement points in standards of various countries are all grid method.In terms of determination methods of velocity and volume flow rate,there is a significant gap between China and other country in the development of standards in China,especially lacking three-dimensional or two-dimensional pitot tube methods to improve the accuracy of measurement results,the measurement methods of wall effects adjustment fact to reduce measurement errors,measurement uncertainty evaluation methods aimed at evaluating the accuracy of results,and so on.On this account,it is necessary for China to accelerate the development of manual monitoring standard methods for flue gas flow velocity and flow rate from multi-aspects.
flue gas velocity and flow ratemanual monitoringmeasurement sitesmeasurement pointsdetermination methods
万方数据
维普
