Computer Based Thermodynamic Properties of Ammonia-Water Mixture for the Analysis of Power and Refrigeration Cycles

Year 2012, Volume: 15 Issue: 3, 133 - 139, 04.06.2012

Achin Chowdhuri Kausik Sadhukhan Bijan Mandal

Abstract

The thermodynamic analysis and optimization of combined power and refrigeration cycle as well as the improved vapour absorption refrigeration system necessitate the development of computer based thermodynamic properties of ammonia-water mixture. In this work, a computer code has been developed for the thermodynamic properties of ammonia water mixture for different pressures, temperatures and ammonia mass fraction concentration. This has been achieved by using some exact thermodynamic relations and some co-relations available in the literature. The computed results have been compared with the published experimental data and the agreement is found to be of good accuracy. The errors in the computed results for different thermodynamic properties are slightly more at comparatively high pressure and temperature. The maximum error is found to be with saturated liquid mixture entropy and its value is also less then 3.8% even at a high pressure of 34.47 bar.

Keywords

Ammonia- water mixture, enthalpy, entropy, Gibbs free energy, mass fraction, thermodynamic properties

References

• Abovsky, V. 1996. Thermodynamics of ammonia-water mixture. Fluid Phase Equilibria. Vol. 116: 170-176.
• Barhoumi, M. A., Snoussi, N., Ezzine, B., Mejbri, K.H. and Bellagi, A. 2004. Modelling of the thermodynamic properties of the ammonia/water mixture. International Journal of Refrigeration. Vol. 27: 271– 283.
• El-Sayed, Y.M. and Tribus, M. 1985. ASME special publication AES 1, New York: ASME, 89.
• IAPWS 2001. Guideline on the IAPWS formulation 2001 for the thermodynamic properties of ammonia-water mixtures, Gaithersburg MD, USA.
• Ibrahim, O.M. and Klein, S. A. 1993. Thermodynamic properties of ammonia-water mixtures. ASHRAE Transaction. Vol. 99: 1495-1502.
• IIR. 1994. Thermodynamic and physical properties of NH3- H2O, International Institute of Refrigeration, Paris, France.
• Kalina, A. I. 1983. Combined cycle and waste-heat systems recovery thermodynamic energy cycle utilizing low-temperature heat for power generation, ASME Paper No. 83-JPGC- GT-3. based on a novel
• Macriss, R.A., Eakine, B.E., Ellington, R.T. and Huebler J. 1964. Physical and thermodynamic properties of ammo- nia-water mixtures. Research Bulletin No. 34. Institute of Gas Technology, Chicago (IL), USA.
• Mejbri, K.H. and Bellagi, A. 2006. Modeling of the thermodynamic properties of the water ammonia mixture by three different approaches. International Journal of Refrigeration. Vol. 29:211-218.
• Merkel, F. andBošnjaković , F. 1929. Diagramme und Berechnung K ltemaschinen. Verlag Von Julius Springer, Berlin.
• altemaschinen. Verlag Von Julius Springer, Berlin.
• ltemaschinen. Verlag Von Julius Springer, Berlin. der Absorptions- Niebergall, W. 1959. Sorptious- Kaaltemaschinen,
• Handbuch der Kaltetechnik, 7, band, Herausgegeben
• von R. Plank, Springer-Verlag, Berlin.
• Patek, J. and Klomfer, J. 1995. Simple functions for fast calculations of selected thermodynamic properties of the ammonia-water system. International Journal of Refrigeration. Vol. 18: 228-234.
• Perman, E.P. 1901. Vapour pressure of aqueous ammonia solution, part I. J Chem Soc. (Lond). Vol.79: 718-725.
• Rizvi, S.S.H. and Heidemann, R.A. 1987. Vapor-liquid equilibrium in the ammonia-water system. J Chem Eng Data. Vol. 32: 183-191.
• Sassen, C.L., Kwartel, R.A.C., van der Kooi, H.J. and de Swaan, A. 1990. Vapor-liquid equilibrium for the system ammonia + water up to the critical region. J Chem Eng Data. Vol. 35: 140-144.
• Scatchard, G., Epstein, L.F., Warburton, J. and Cody, P.J. 1947. Thermodynamic properties saturated liquid and vapor of ammonia-water mixtures, Refrigeration Engineering. Vol. 53: 413-452.
• Smolen, T. M., Manley, D. B. and Poling, B.E. 1991. Vapor-liquid equilibrium data for the NH3-H2O system and its description with a modified cubic equation. J Chem Eng Data. Vol. 36: 202-208.
• Taleb, A. H., Feidt, M. and Lottin, O. 2003. Thermodynamic properties of ammonia-water mixture. Proceedings, International Congress of Refrigeration, Washington D.C., ICR0113.
• Tilner-Roth, R. and Friend, D.G. 1998. A Helmoltz free energy formulation of the thermodynamic properties of the mixture {Ammonia+water}. Journal of Physical Chemistry. Vol. 27(1): 63 – 96.
• Weber, L.A. 1999. Estimating the virial coefficients of the ammonia-water mixture. Fluid Phase Equilibria. Vol. 162: 31–49.
• Wilson, T.A. 1924. Properties of aqua-ammonia part 1. The total pressures. Refrigeration Engineering. Vol.10:248- 252.
• Xu, F. and Goswami, D. Y. 1999. Thermodynamic properties of ammonia water mixtures for use in power cycles. Energy. Vol. 24: 525–536.
• Xu, F.and Goswami, D. Y. 2002. Erratum to: thermodynamic properties of ammonia water mixtures for use in power cycles. Energy. Vol. 27: 203-203.
• Ziegler, B. and Trepp, C. 1984. Equation of state for ammonia-water mixtures. International Journal of. Refrigeration. Vol.7:101-106.