Methodology and software for measuring the specific differences of the calculated volumes of natural gas

Abstract

The most accurate measurement of natural gas volumes by domestic meters can be achieved only in case when the gas parameters (pressure, temperature) are maximally approximated to the standard conditions. Otherwise, it is necessary to perform additional measurements of these parameters, but most domestic gas meters do not include the measuring instruments to obtain these quantities; or to carry out approximate mathematical calculations, which from the point of view of metrology is unreliable.The purpose of the work is mathematical modeling of specific differences of the accounted volumes of natural gas and development of methods for their measurement.The methodology of measurement by indirect methods of changing the volumes of natural gas in gas supply systems of residential buildings with domestic gas meters is developed. The dependence is obtained for estimating the specific differences of natural gas volumes in domestic consumers by measuring the volume of gas by a household gas meter, the temperature parameters of the air in the room near the gas pipeline and the gas and air meter. The physical quantities of the ambient air parameters are identified, which are determined by the method of direct measurement, and based on the obtained results, a methodology for estimating the metrological characteristics of the indirect measurement of the specific differences of natural gas volumes is developed.The results obtained by theoretical development are confirmed by experimental studies on a certified calibration setup operating on natural gas.The results obtained can be the basis for reviewing the existing and developing new regulatory documents for determining the specific differences in natural gas volumes recorded by domestic gas meters. Prospects for further research are the development of the structure of the information measurement system and devices for the determination of the specific losses of natural gas in house systems of gas supply.