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Received April 28, 2009
Accepted August 13, 2009
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천연가스 주요 물성 간의 상관식
Correlations between the Important Physical Properties of Natural Gas
한국가스공사 연구개발원 유체계량연구실, 426-790 경기도 안산시 상록구 일동 638-1
Fluid Measurement Research Lab, R&D Division, KOGAS, 638-1 Il-dong, Sangnok-Gu, Ansan, Gyeongii 426-790, Korea
fractals@kogas.or.kr
Korean Chemical Engineering Research, October 2009, 47(5), 599-607(9), NONE Epub 5 November 2009
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Abstract
본 연구에서는 천연가스와 관련된 정보 중 쉽게 구할 수 있는 발열량이나 비중만으로 비중(또는 발열량), 압축인자, 밀도 등을 계산할 수 있는 5가지 상관식을 도출하고자 하였다. 상관식 도출에 필요한 충분한 수의 기초 데이터를 생성하기 위해 SGERG 상태방정식을 발열량식으로 변형하여 사용하였고, 이렇게 생성된 데이터를 기초로 5가지 상관식을 도출하고 불확도를 평가하였다. 그 결과 대부분의 조건에서 상관식의 불확도가 0.1% 근방으로 나타나 천연가스 업계와 학계에서 사용될 수 있을 것으로 판단한다.
This study was conducted to derive the five correlations which could predict specific gravity(or heating value), compression factor, density, etc., if we know heating value or specific gravity only. To make a sufficient number of raw data for regression, SGERG EOS was modified into equation of heating value. Based on these raw data, five correlations were obtained and the uncertainties of the correlations were evaluated. The results showed that the uncertainties were near 0.1% in most conditions of natural gas and so the correlations could be used in natural gas industry and academic fields.
References
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)
ISO 6976, Natural Gas - Calculation of Calorific Values, Density, Relative Density and Wobbe Index from Composition, International Organization for Standardization, Geneva (1995)
ISO GUM, Guide to the Expression of Uncertainty in Measurement, International Organization for Standardization, Geneva (1995)
ISO 5168, Measurement of Fluid Flow - Evaluation of Uncertainties, International Organization for Standardization, Geneva (1998)
Ha YC, Lee CG, Korean Chem. Eng. Res., 39, 678 (2001)
ISO 13443, Natural Gas - Standard Reference Conditions, International Organization for Standardization, Geneva (1996)
AGA 8, Compression Factors of Natural Gas and Other Related Hydrocarbon Gases, American Gas Association (1994)
ISO 6976, Natural Gas - Calculation of Calorific Values, Density, Relative Density and Wobbe Index from Composition, International Organization for Standardization, Geneva (1995)
ISO GUM, Guide to the Expression of Uncertainty in Measurement, International Organization for Standardization, Geneva (1995)
ISO 5168, Measurement of Fluid Flow - Evaluation of Uncertainties, International Organization for Standardization, Geneva (1998)
Ha YC, Lee CG, Korean Chem. Eng. Res., 39, 678 (2001)
ISO 13443, Natural Gas - Standard Reference Conditions, International Organization for Standardization, Geneva (1996)
