Analysis of influencing factors and uncertainty assessment of high-pressure natural gas primary standard facility

IF 2.3 3区工程技术 Q2 ENGINEERING, MECHANICAL

Flow Measurement and Instrumentation Pub Date : 2024-11-13 DOI:10.1016/j.flowmeasinst.2024.102747

Wei Han , Tao Guo , Zhe Guo , Xu Han , Yingqi Zhang , Panwen Xu , Xiangjun Wen , Yucheng Lu

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引用次数: 0

Abstract

The mass-time high-pressure natural gas flow standard device is the highest level natural gas flow measurement standard in China. It is mainly used to reproduce the mass flow of high-pressure natural gas and transfer the value. Due to its important position in the value traceability transmission systems, it is of great significance to improve its uncertainty. This article first introduces the working principle and component equipment of mass-time high-pressure natural gas flow standard device, and the influencing factors and control measures of the recurring mass flow uncertainty are given. Then the calculation model and uncertainty evaluation model of the mass flow rate of the standard device and the discharge coefficient of the critical flow nozzle are given. Finally, based on the calculation model, two critical flow nozzles are calibrated and tested, and their repeatability and stability indicators are discussed and analyzed. After analysis, it can be concluded that the measurement performance of the mass-time high-pressure natural gas flow standard device is stable, which can make the uncertainty of the reproduced mass flow rate less than 0.05 % (k = 2), and the uncertainty of the calibrated discharge coefficient of critical flow nozzle is less than 0.1 %(k = 2).

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高压天然气一级标准设施的影响因素分析和不确定性评估

质量-时间高压天然气流量标准装置是我国最高等级的天然气流量计量标准。它主要用于高压天然气质量流量的复现和量值传递。由于其在量值溯源传递系统中的重要地位，提高其不确定度意义重大。本文首先介绍了质量-时间高压天然气流量标准装置的工作原理和组成设备，给出了重现质量流量不确定度的影响因素和控制措施。然后给出了标准装置质量流量和临界流量喷嘴排量系数的计算模型和不确定度评定模型。最后，基于计算模型，对两个临界流喷嘴进行了标定和测试，并对其重复性和稳定性指标进行了讨论和分析。经过分析，可以得出质量-时间高压天然气流量标准装置的测量性能稳定，可以使复现质量流量的不确定度小于 0.05 %（k = 2），临界流喷嘴标定排量系数的不确定度小于 0.1 %（k = 2）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Flow Measurement and Instrumentation 工程技术-工程：机械

CiteScore

4.30

自引率

13.60%

发文量

123

审稿时长

6 months

期刊介绍： Flow Measurement and Instrumentation is dedicated to disseminating the latest research results on all aspects of flow measurement, in both closed conduits and open channels. The design of flow measurement systems involves a wide variety of multidisciplinary activities including modelling the flow sensor, the fluid flow and the sensor/fluid interactions through the use of computation techniques; the development of advanced transducer systems and their associated signal processing and the laboratory and field assessment of the overall system under ideal and disturbed conditions. FMI is the essential forum for critical information exchange, and contributions are particularly encouraged in the following areas of interest: Modelling: the application of mathematical and computational modelling to the interaction of fluid dynamics with flowmeters, including flowmeter behaviour, improved flowmeter design and installation problems. Application of CAD/CAE techniques to flowmeter modelling are eligible. Design and development: the detailed design of the flowmeter head and/or signal processing aspects of novel flowmeters. Emphasis is given to papers identifying new sensor configurations, multisensor flow measurement systems, non-intrusive flow metering techniques and the application of microelectronic techniques in smart or intelligent systems. Calibration techniques: including descriptions of new or existing calibration facilities and techniques, calibration data from different flowmeter types, and calibration intercomparison data from different laboratories. Installation effect data: dealing with the effects of non-ideal flow conditions on flowmeters. Papers combining a theoretical understanding of flowmeter behaviour with experimental work are particularly welcome.