计量学报2025，Vol.46Issue(12)：1768-1774,7.DOI:10.3969/j.issn.1000-1158.2025.12.09
70 MPa加氢机中质量流量计量值溯源体系建立可行性初步研究
Preliminary Study on the Feasibility of Establishment a Traceability System for Mass Flow Measurement Values in 70 MPa Hydrogen Dispensers
摘要
Abstract
In order to improve the value traceability system in the field of gas in China and promote the establishment of the value traceability system of hydrogen refueling machine,based on the value traceability requirements of 70 MPa hydrogen,flow range 0.16～3.6 kg/min,1.5 grade mass flow meter and the measurement ability of the existing pVTt gas flow standard device,a four-stage value traceability system was proposed,and the first and second stages were preliminarily verified.The results show that the difference between the experimental and numerical simulation of the outflow coefficient of the air and hydrogen medium with the same Reynolds number is within 0.20%.Under the same Reynolds number,the difference between the outflow coefficient of air pressure of 2.5 MPa and hydrogen pressure of 4.5 MPa is less than 0.03%,which preliminarily verifies the feasibility of the traceability system and provides technical support for the traceability of sonic nozzles applied to hydrogen medium to air medium.关键词
流量计量/加氢机/pVTt法气体流量标准装置/音速喷嘴/流出系数/数值模拟/量值溯源Key words
flow measurement/hydrogen refueling machine/pVTt gas flow standard device/sonic nozzles/discharge coefficient/numerical simulation/value traceability分类
通用工业技术引用本文复制引用
卜瑞莹,李春辉,徐雅,谢代梁,曹培娟..70 MPa加氢机中质量流量计量值溯源体系建立可行性初步研究[J].计量学报,2025,46(12):1768-1774,7.基金项目
国家市场监管总局质量强链专项(ZLQL2024003-05) （ZLQL2024003-05）
