The Modeling and the Experimental Researches of the Microwave-Measuring Transformer of the Humidity of Natural Gas

Abstract

There has been considered the problem of ensuring the accuracy of quality assessment of natural gas when the composition of gas is in accordance with the specific values of its main physical properties (a calorific value, a rate of moisture, the presence of corrosive components (hydrogen sulfide, carbon dioxide, etc.)) and its possible solving grounded in the modern gas measuring approaches. The most dangerous and, in this way, important is an issue with a humidity presence inside of a gas mix because it can cause such negative outcomes as the corrosion of the pipelines and armatures, the formation of hydrates (composition of water and other agents ) and the condensates. There has been proposed the math model of microwave-measuring transforming of natural gas humidity bases on the absorbing of a microwave signal and, in such a way, measuring of signal volume on the end of a waveguide during the changing of the gas humidity. To do this, we use the properties of running wave. The natural gas can be presented as the binary heterogeneous structure of two dielectrics (water-gas), so the equivalent scheme allows us measure the electric losses in a capacitor system using the know frequency of an electric signal. The modeling of an equivalent scheme of a microwave-measuring transformer of natural gas humidity and its main results has been presented. The experimental researches of a microwave-measuring transformer of natural gas humidity have been carried out. For this purpose, the research methodology was developed and specific instruments and measuring devices were implemented: the model generator of natural gas humidity “Rodnic-2”, the stationary gauge system Mitchell Dew Point Calibration System Precesion Dewpointmeter produced by Michell Instruments and calculator Free Professional Online Humidity Calculator. The results of the experimental researches and modeling confirm the adequacy of the developed model of a microwave-measuring transformer of natural gas humidity.