순수물질의 포화증기밀도 상관식의 성능비교 연구

박경근; Kyoung Kuhn Park

Korean Chemical Engineering Research, Vol.42, No.1, 124-127, February, 2004

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순수물질의 포화증기밀도 상관식의 성능비교 연구

Comparative Study on the Performance of Saturated Vapor Density Correlations for Pure Substances

박경근^†

국민대학교 기계자동차공학부, 136-702 서울시 정릉동 861-1

Kyoung Kuhn Park^†

School of Mechanical and Automotive Engineering, Kookmin University, 861-1, Chongnung-dong,Songbuk-gu, Seoul 136-702, Korea

E-mail:

초록

포화증기밀도의 로그함수와 온도역수 함수(T_c/T-1)사이의 관계를 나타내는 포화증기밀도 상관식을 이용하여 41개 순수물질의 포화증기밀도 자료를 곡선 접합하였으며, 4항 상관식의 경우 평균 AAD(평균절대편차)가 0.12%이었다. 이는 기존의 온도함수(1-T/T_c)의 멱급수 형태 5항 상관식의 0.27%에 비하여 항수는 줄이면서 성능은 개선한 결과이다. 이 상관식은 임계점에서부터 삼중점 또는 자료가 있는 최저 온도까지의 전 온도 범위에서 사용할 수 있다.

A saturated vapor density correlation, which relates logarithmic density to the inverse of temperature, is used to fit the saturated vapor density data for 41 pure substances. The equation with 4 terms in it yields an average AAD of 0.12%, which compares with 0.27% of 5-term conventional equation, so that the performance is improved while the number of terms is reduced. The equation used in this study is valid over the entire temperature range from critical point to triple point or the lowest temperature where data points exist.

Keywords:Correlation;Saturated Vapor Density;Thermodynamic Property

[References]

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[1] Tillner-Roth R, Baehr HD, J. Phys. Chem. Ref. Data, 23(5), 657 (1994)

[2] Span R, Lemmon EW, Jacobsen RT, Wagner W, Yokozeki A, J. Phys. Chem. Ref. Data, 29(6), 1361 (2000)

[3] Park KK, Korean J. Air-Conditioning Refrigeration Eng., 10(5), 550 (1998)

[4] Walas SM, Phase Equilibria in Chemical Engineering, Butterworth-Heinemann, Boston, MA, 87-89 (1985)

[5] ASHRAE, ASHRAE Handbook Fundamentals, Chap. 17, ASHRAE, Atlanta, GA (1993)

[6] ASHRAE, ASHRAE Handbook Fundamentals, Chap. 18, ASHRAE, Atlanta, GA (1997)

[7] ASHRAE, ASHRAE Handbook Fundamentals, Chap. 20, ASHRAE, Atlanta, GA (2001)

[8] Lemmon EW, McLinden MO, Friend DG, Linstrom PJ, Mallard WG, "NIST Chemistry WebBook," NIST Standard Reference Database Number 69, NIST, Gaithersburg, MD (http://webbook.nist.gov) (2001)