CAJ | 학술논문

天然气压缩因子 Z在天然气工程计算中是最重要的物性参数之一，其获取方法主要分为查Standing-Katz图法、实验法、状态方程计算法和经验公式法。前两种方法在使用上有很大的限制性，目前状态方程计算法和经验公式法的应用优势明显。对基于气体组成来求解压缩因子的AGA8-92DC、Piper-DAK、Piper-Mahmoud、Elsharkawy-DAK和Elsharkawy-Mahmoud方程进行了计算准确度评价。将这5个待评价的计算关系式写入Visual Basic 6．0，并使用113个酸性贫气压缩因子实测值对5个方程的计算值进行了对比分析。分析结果认为，对于低中压含碳贫气， AGA8-92DC方程的计算误差最小；对于低中压含硫含碳贫气，Piper-Mahmoud的计算误差较其他方程最小。此外还发现，当天然气温度升高时，5个方程的计算值误差较原来均有所减小。
천연기압축인자 Z재천연기공정계산중시최중요적물성삼수지일，기획취방법주요분위사Standing-Katz도법、실험법、상태방정계산법화경험공식법。전량충방법재사용상유흔대적한제성，목전상태방정계산법화경험공식법적응용우세명현。대기우기체조성래구해압축인자적AGA8-92DC、Piper-DAK、Piper-Mahmoud、Elsharkawy-DAK화Elsharkawy-Mahmoud방정진행료계산준학도평개。장저5개대평개적계산관계식사입Visual Basic 6．0，병사용113개산성빈기압축인자실측치대5개방정적계산치진행료대비분석。분석결과인위，대우저중압함탄빈기， AGA8-92DC방정적계산오차최소；대우저중압함류함탄빈기，Piper-Mahmoud적계산오차교기타방정최소。차외환발현，당천연기온도승고시，5개방정적계산치오차교원래균유소감소。
Natural gas compressibility factor Z is one of the most important physical parame-ters in the natural gas engineering calculations , and the determining methods mainly include Standing-Katz chart method ,laboratory experiments method ,equations of state law method and the empirical formulas method .Due to the usage limitations of the former two methods ,the ap-plication advantages of equations of state law method and the empirical formulas method become increasingly evident .In this paper ,the calculation accuracy of equations that calculate compressi-bility factor based gas composition was evaluated .The equations include AGA8-92DC ,Piper-DAK ,Piper-Mahmoud ,Elsharkawy-DAK and Elsharkawy-Mahmoud .These five calculation for-mulas to be valuated were written into Visual Basic 6 .0 and 113 measured values of acidic lean gas compressibility factor were used to compare with the calculated values of these five formulas . The comparison indicates that firstly for the lean gas with carbon dioxide at low pressure or medi-um pressure ,the calculation error of AGA8-92DC is less than others ;secondly ,for the lean gas with hydrogen sulfide and carbon dioxide at low or medium pressure ,the calculation error of Pip-er-Mahmoud is minimal compared to the other correlations .In addition ,this study presents that w hen the temperature of natural gas increases ,the errors of calculated values by these five for-mulas will all decrease compared with the original calculation errors .