1. Beijing Gas Group Company Limited, Beijing 100035, China
2. National City Gas Flowrate Metering Station, Beijing 100035, China
3. National Institute of Metrology, Beijing 100029, China
Abstract：In order to meet the traceability requirements of city gas flow meters, the gas flow standard facility was built based on master meter method. As the non-fixed usage of master meters and the low temperature of natural gas, the uncertainty evaluation and control of the standard facility were investigated. The results showed that the standard facility used four turbine flowmeters as master meters and has mobility, while the achievable flowrate range was within 60~8600m3/h and the pressure range of 2~4MPa. The uncertainty of the non-point usage of the master meters was controlled based on the curve fitting method, while the uncertainty of the city gas flow standard facility was 0.26% (k=2). Compared with NIM-2014, NIM-2015 was more suitable for master meters with scattered error curves. On this basis, the heat transfer model of low-temperature natural gas flow in pipeline was established. It was found that the dynamic temperature balance of the facility can be achieved through a longer pre-flow time, which can improve the measurement repeatability, the uncertainty of the calibrated flowmeter was 0.32% (k=2).
Yang Y P, Liu B T, Xu M. Capacity Improvement of Natural Gas Flow Standard Device［J］. Acta Metrologica Sinica, 2021, 42(3):339-345.
［5］
Wang C, Li C H, Xu M, et al. The High Pressure Close Loop Gas Flow Standard Facility in NIM［C］// FLOMEKO 2019, Portugal, Lisbon, 2019.
［11］
张翰. 基于雷诺数对涡轮流量计计量特性的研究［D］. 杭州:中国计量大学, 2016.
Zhang H, Li C H, Cui L S, et al. The Close Loop Standard Facility of High Pressure Gas Flow［J］. Acta Metrologica Sinica, 2017, 38(3):324-327.
Li C H, Li P. The Investigation on the Evaluation for the Turbine Meter by the Use of Non-Fixed Point as Master Meter［J］. Acta Metrologica Sinica, 2015, 36(6):610-612.
［18］
Garrido P L, Hurtado P I, Nadrowski B. Simple One-dimensional Model of Heat Conduction Which Obeys Fouriers Law［J］. Physical Review Letters, 2001, 86(24): 5486-5489.
［19］
Dittus F W, Boelter L M K. Heat Transfer in Automobile Radiators of the Tubular Type［J］. International Communications in Heat and Mass Transfer, 1985, 28(1): 3-22.
Cox M G. The Evaluation of Key Comparison Data［J］. Metrologia, 2002, 39(6):589-595.
［1］
苏彦勋, 梁国伟, 盛健. 流量计量与测试［M］. 2版. 北京:中国计量出版社, 2007.
Chang H G, Duan J Q. Natural Gas Measurement Technology and Outlook in China［J］. Natural Gas Industry, 2020, 40(1):110-118.
Guo M C, Qiu H, Zhou L. High Pressure Natural Gas Flowmeter Calibration Facilities［J］. Acta Metrologica Sinica, 2008, 29(5): 479-483.
［14］
Zhang H, Jia L. The Error Model of Turbine Flowmeter Based on Reynolds Number［C］// FLOMEKO 2016, Australia, Sydney, 2016.
［16］
李静静. 城市门站天然气调压过程中冷能的回收及应用研究［D］. 重庆:重庆大学, 2011.
Wang H, Li C H, Li M N. Standard Facility of Natural Gas Energy Measurement Based on Verification Method of Sound Velocity［J］. Acta Metrologica Sinica, 2022, 43(9):1186-1191.
［2］
JJG 2064-2017 气体流量计量器具检定系统表［S］. 2017.
［4］
Ren J, Duan J Q, Dong Y. Application and Uncertainty Analysis of A New Balance Used in Natural Gas Primary Standard up to 60 Bar［C］//Flomeko 2019, Portugal, Lisbon, 2019.
［6］
Duan J Q, Liu C Y, et.al. Research of Improving Accuracy of the 3-ton Electric Balance for Gas Flow Measurement［C］// FLOMEKO 2014, China, Guilin, 2019.
Donald Q K. Process Heat Transfer［M］. New York:Mc-Graw-Hill, 1990.
［20］
Nagy K, Lathouwers D, TJoen C G A, et al. Steady-state and Dynamic Behavior of a Moderated Molten Salt Reactor［J］. Annals of Nuclear Energy, 2014(64): 365-379.
Li C H, Cui L S, Wang C, et al. Uncertainty Evaluation and Capability Verification of Gas Flow Close Loop Standard Facility［J］. Acta Metrologica Sinica, 2020, 41(12A): 7-10.
2023, Vol. 44 
