热式质量燃气表在不同气体中计量特性和自适应转换实验研究
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摘要
MEMS热式质量燃气表的计量准确与天然气组分变化存在相关性。本实验采用实流标定装置测量热式质量燃气表在8种不同组分12T天然气的计量性能,验证一款MEMS热式质量燃气表的气体组分识别功能。在所选择的不同气体组分实流测试中,该MEMS热式质量燃气表能够实现流过气体组分自动识别以及计量参数的自动切换,满足燃气表准确计量的要求。
The metrology of the utility gas meters with MEMS thermal mass flow sensing technology is associated with thermal value or composition of natural gases. A positive pressure real gas flow calibration test facility is designed and assembled to verify the compliance of the MEMS utility gas meters to the current volumetric metrology standard with 8 kinds of 12 T natural gases. The MEMS utility gas meters in this work have the embedded gas recognition capability such that when the gas thermal value or composition varies the meters can automatically compensate the referenced volumetric metrology deviations due to the changes. Tests with air and eight natural gases confirmed its gas recognition capability that met the requirements of the current metrology standards.
The metrology of the utility gas meters with MEMS thermal mass flow sensing technology is associated with thermal value or composition of natural gases. A positive pressure real gas flow calibration test facility is designed and assembled to verify the compliance of the MEMS utility gas meters to the current volumetric metrology standard with 8 kinds of 12 T natural gases. The MEMS utility gas meters in this work have the embedded gas recognition capability such that when the gas thermal value or composition varies the meters can automatically compensate the referenced volumetric metrology deviations due to the changes. Tests with air and eight natural gases confirmed its gas recognition capability that met the requirements of the current metrology standards.
引文
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[2]MATTER D,KRAMER B,KLEINER T,et al.Microelectronic domestic gas meter with new technology[J].TechnischesMessen,2004,71:3-22.
[3]Norma Italiana,Contatori di gas-Contatori di gas con element di misuramassico-termico a circuitocapillare:UNI 11625[S].UNI EnteItaliano Di Normazione,2016.
[4]黄立基,雷励.MEMS流量传感技术及其最新进展[C]//2008年全国流量计量学术交流会论文集,2008.
[5]热式气体质量流量计:JJG1132-2017[S].北京:中国质检出版社,2017.
[6]封闭管道中流体流量的测量热式质量流量计:GB/T 20727-2006[S].北京:中国标准出版社,2006.
[7]王东,雷励,张瑶.浅谈天然气流量实流标定装置[J].中国测试技术,2006,32(3):29-32.
[8]罗凡,孙玉声.不同介质对质量流量计的校准误差影响[J].中国测试技术,2007,33(6):52-54.
[9]城镇燃气分类和基本特性:GB/T 13611-2006[S].北京:中国标准出版社,2006.
[10]天然气:GB 17820-2012[S].北京:中国质检出版社,2012.
[11]Test gases-Test pressures-Appliances categories:EN437:2003+A1:2009[S].European Committee for Standardization,2009.