Browse > Article

Empirical Equations for Thermodynamic Physical Properties of Freon-23 and HFC-227ea  

김재덕 (한국과학기술연구원, 국가지정 초임계유체연구실)
이윤우 (한국과학기술연구원, 국가지정 초임계유체연구실)
송명석 (초정밀분리기술센터, 인하대학교, 화학공학과)
노경호 (초정밀분리기술센터, 인하대학교, 화학공학과)
Publication Information
Fire Science and Engineering / v.16, no.3, 2002 , pp. 16-25 More about this Journal
Abstract
For Freon-23, a conventional extinguished agent regulated by Montreal Protocol and HFC-227ea, its alternative, the empirical equations were correlated in terms of saturated pressure, density, viscosity, enthalpy and surface tension. They were obtained by regression analysis from the experimental data in the literature. The empirical equations of saturated pressure were expressed as the second and third order function of temperature. The empirical equation of density was expressed as compressibility factor and saturated pressure by a function of temperature. The empirical equation of viscosity was formulated as a power function. Heat capacities as well as enthalpies were well fitted by empirical form of the second-order temperature. Finally, surface tension simply has linear function form in terms of temperature.
Keywords
Extinguished agents; Freon-23; HFC-227ea; Physical property; Empirical equation;
Citations & Related Records
연도 인용수 순위
  • Reference
1 United Nation Environmental Program (UNEP). 'Montreal Protocol on Substances That Deplete The Ozone Layer(1987)
2 VA Gruzdez, R.A. Khairulin, S.G. Komarov, and S.V. Stankus, 'Thermodynamic Properties of HFC227ea', Tntemational Joumal of Thermophysics, Vol. 23, No. 3(2002)
3 J.M. Smith, H.C. van Ness, and M.M. Abbott, 'Introduction to Chemical Engineering Thermodynamics', 5th ed.(1997).
4 J. Klomfar, J, Hruby, and O. Sifner, 'Measurement of the (T, p, p) behaviour of HFC-227ea in the liquid phase', J, Chem. Thermodynamic, 26, pp.965-970(1994)   DOI   ScienceOn
5 M.L. Robin, 'Thermodynamical Properties of HFC-227ea', Great Lakes Chemical Corporation
6 R.C. Reid, J,M. Prausnitz, and B.E. Poling, 'The Properties of Gases & Liquids', 4th ed.(l988)
7 Luft-Kaltetecknik, Vol. 9, No.3, 125-7(1973)
8 Y.C. Hou, and J.J. Marin, 'Physical and Thermodynamic Property Trifluoromethane', AICHE, Joumal 5th, 125-129(1959)   DOI
9 RB. Stwewart, R.T. Jacobson, and S.G. Penoncello, 'Thermodynamic Property of refrigerants', ASHRAE
10 S.Y. Lee, and D.M. HA, 'Newest Chemical Engineering safety Engineering', Donghwagisul press, Seoul(1977)
11 L. Shi, Y.Y. Duan, M.S. Zhu, L.Z. Han, and X. Lei, 'Vapor pressure of 1,1,1,2,3,3,3,-heptafluoropropane', Fluid phase Equilibia, 163, pp.l09-117(1990)
12 C. Zhang, Y.Y. Duan, L. Shi, M.S. Zhu, and L.Z. Han, 'Speed of Sound, Ideal-gas Heat capacity at Constant Pressure, and Second Virial Coefficients of HFC-227ea', Fluid Phase Equilibria, Vol. 178, 1-2, pp.73-85(2001)   DOI   ScienceOn
13 W.L. McCabe, J,C. Smith, and P. HarriottUnit, 'Operations of Chemical Engineering', 5th ed.(1993)
14 K.H. Row, M.S. Song, S.G. Han, J,D. Kim, and Y.W Lee, 'Empirical Equations For Physical Properties of Halon-1305 and $CO_2$' T. of Korean Institute of Fire Sci. & Eng. Vol. 16, No. 2(2002)