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Received May 13, 2009
Accepted July 27, 2009
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천연가스의 탄화수소 및 물 이슬점 계산
Calculation of the Hydrocarbon and Water Dew points of Natural Gas
한국가스공사 연구개발원 유체계량연구실, 429-790 경기도 안산시 상록구 일동 638-1
Fluid Measurement Lab, R&D Division, KOGAS, 638-1 Il-dong, Sangnok-gu, Ansan, Gyeonggi 426-790, Korea
fractals@kogas.or.kr
Korean Chemical Engineering Research, October 2009, 47(5), 565-571(7), NONE Epub 5 November 2009
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Abstract
본 연구에서는 천연가스의 탄화수소 이슬점과 물 이슬점을 계산하고자 하였다. 이를 위해 임계압력 근방까지 탄화수소 이슬점이 계산되도록 발산 방지 로직을 고안하였고 물 이슬점의 대해서는, 상용프로그램과 달리 탄화수소 이슬점 이하에서도 이슬점이 계산될 수 있도록 로직을 개발하였다. 그리고 계산결과는 국외 상용프로그램 및 ISO와 비교하였으며 차이는 없는 것으로 나타났다.
This study was conducted to evaluate hydrocarbon and water dew points of natural gas. For this purpose, algorithm of suppressing divergence was devised to evaluate hydrocarbon dew point up to near critical point and algorithm for finding water dew points lower than that of hydrocarbon, which cannot be calculated by commercial dew point program, was developed. The evaluated values were compared to commercial program and ISO reference values, and the results showed that deviations were zero.
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ISO 12213, Natural Gas Calculation of Compression Factor, International Organization for Standardization, Geneva (1997)
AGA 8, Compression Factors of Natural Gas and Other Related Hydrocarbon Gases, American Gas Association (1994)
Peng DY, Robinson DB, Ind. Eng. Chem. Fundam., 15, 59 (1976)
Soave G, Chem. Eng. Sci., 27, 1197 (1972)
Bryant N, Advantica Report No. 7202, Loughborough, UK (2008)
ISO/FDIS 18453, Natural Gas Correlation between Water Content and Water Dew Point, International Organization for Standardization, Geneva (2004)
Kim SE, Project No. KGCR008, Korea Gas Corporation (1991)
Ziervolgel RG, Fluid Phase Equilibria, 11, 127 (1983)
ISO 6976, Natural Gas Calculation of Calorific Values, Density, Relative Density and Wobbe Index from Composition, International Organization for Standardization, Geneva (1995)
Ahmed T, Gulf Publishing Company, Houston, Texas, 250 (1989)
