Abstract
It is very important to measure gas flow rate transported by pipeline for city gas distribution. Though, the gas flow rate is measured at thousands of point where flow meters have been installed such as regulating stations, Tokyo Gas has developed tracer gas method as a new approach for simple flow rate measurement at the point where the flow meters have not been installed at present to realize more efficient gas distribution. In this paper, we report diffusion behavior in the city gas pipeline and accuracy of gas flow rate measurement by means of tracer gas, resulting from actual full-scale experiments and diffusion analyses.
