Improved Accuracy of NaturalGas Turbine Flow Meters Using Carbon Dioxide as theCalibration Media

摘要

Recent AGA research has found differences between calibration and actual natural gas flowing conditions cause turbine meter measurement errors commonly 1/4 to 1%. In some cases errors were as high as 3 to 5%. The effect was unique to each meter, meaning that calibration at actual gas flowing conditions is necessary to ensure accurate measurement. A novel and new calibration process using CO2 to replicate natural gas flowing conditions addresses barriers to representative natural gas calibration over a wide range of industry operating conditions. This paper will overview the problem with natural gas turbine meter calibration, summarize researchrnvalidating the use of carbon dioxide for natural gas meter calibration, and present early comparative results from a CO2 calibration facility commissioned in the spring of 2005.