CONDUCTING METROLOGICAL RESEARCH OF GAS METERS IN THE RANGE OF GAS VOLUME FLOW UP TO 25,000 M3/HOUR WITHIN THE FRAMEWORK OF UKRAINE’S ENERGY SECURITY

Abstract

The article describes the development of a working standard for the verification and calibration of gas meters and flowmeters within a volumetric gas flow range from 1 m³/h to 25,000 m³/h. The primary goal of the development is to create a working standard (facility) traceable to the national standard of Ukraine, ensuring high measurement accuracy and compliance with modern technical and metroThe principle of operation was selected based on an analysis of existing types of facilities, including bell-type systems, piston systems, PVTt-type systems, nozzle systems, and systems based on reference gas meters. Considering their advantages, disadvantages, and limitations, a facility type was chosen that effectively addresses the set objectives. It is based on a multi-line system of reference turbine and rotary meters, which provides the necessary metrological traceability and allows for an expanded range of flow rates compared to the existing reference base of Ukraine.The use of a multi-level gas flow control system, implemented through frequency control of motor speed and positional regulation of shut-off valves, allows for setting and stabilizing flow rates across different operating modes of the facility.An important aspect of the development is the application of modern calculation algorithms that consider the effects of temperature and pressure on volume changes during testing. Additionally, the facility's software integrates the requirements of current verification methodologies for turbine, rotary, ultrasonic meters, and meters with built-in volume converters. This ensures the automation of the facility’s operations and the generation of corresponding electronic verification protocols.The results of experimental studies confirmed the high efficiency of the selected facility type and the relevance of the development. This facility can operate over a wide range of flow rates, from 1 m³/h to 25,000 m³/h, making it a unique solution for the metrological support of industrial gas meters. Moreover, it highlights the

potential for international integration and further recognition of the measurement and calibration capabilities of SE "IVANO-FRANKIVSKSTANDARTMETROLOGY" at the international level.