Heat and Mass Transfer

, Volume 48, Issue 3, pp 497–503 | Cite as

Effect of salt on boiling heat transfer of ammonia-water mixture

  • A. SathyabhamaEmail author


Nucleate pool boiling heat transfer coefficients were determined experimentally for NH3–H2O, NH3–H2O–LiNO3 and NH3–H2O–LiBr mixtures. Both the salts were effective in increasing the heat transfer coefficient of NH3–H2O mixture. A concentration of 10 mass% of the salts in water, produced the greatest enhancement in heat transfer coefficient at all the range of pressure, heat flux and ammonia concentration studied in this investigation. The experiments indicated that ammonia concentration also has the impact on the augmentation of heat transfer coefficient in NH3–H2O binary mixture by the addition of salts. For the solution of ammonia mass fraction 0.30, high concentration of LiBr gives the highest heat transfer coefficient, for ammonia mass fraction of 0.25, high concentration of LiNO3 gives the maximum heat transfer coefficient, for ammonia mass fraction of 0.15, both the salts are equally effective in increasing the heat transfer coefficient.


Heat Transfer Coefficient Ternary Mixture Boiling Heat Transfer LiNO3 Lithium Bromide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of symbols


Pressure correction factor


Nucleate boiling heat transfer coefficient (W m−2 K−1)


Pressure (bar)


Heat flux (W m−2 K−1)


Temperature (K)


Liquid phase mass fraction


Vapour phase mass fraction

Greek symbols


Temperature difference (K)



Boiling range


Critical property




Reduced property



Author would like to acknowledge the financial assistance provided by the Management of MSRIT to carry out this research work. Author is also grateful to Dr. V. Krishnan who gave valuable suggestions during this research work.


  1. 1.
    Foote HW (1921) Equilibrium in the system ammonia + water + ammonium thiocyanate. J Am Chem Soc 43:1031–1038Google Scholar
  2. 2.
    Davis ROE, Olmstead LB, Lundstrum FO (1921) Vapor pressure of lithium nitrate: ammonia system. J Am Chem Soc 43:1575–1580CrossRefGoogle Scholar
  3. 3.
    Davis ROE, Olmstead LB, Lundstrum FO (1921) Vapor pressure of ammonia-salt solutions. J Am Chem Soc 43:1580–1583CrossRefGoogle Scholar
  4. 4.
    Reiner RH, Zaltash A (1993) Densities and viscosities of ternary ammonia/water fluids. ASME Winter Annual Meeting, New Orleans, Nov 28-Dec 3Google Scholar
  5. 5.
    Ehmke HJ, Renz M (1983) Ternary working fluids for absorption systems with salt-liquid mixtures as absorber. IIF—IIR Congres, Commission B1, Paris, Aug 31-Sept 7Google Scholar
  6. 6.
    Simona L, Daniel S, Manel V, Xavier E, Alberto C (2007) Vapor-liquid equilibrium of ammonia + lithium nitrate + water and ammonia + lithium nitrate solutions from (293.15 to 353.15) K. J Chem Eng Data 52(3):1050–1055Google Scholar
  7. 7.
    Radermacher R (1981) Ph.D. thesis, Technical University of Munich, GermanyGoogle Scholar
  8. 8.
    McLinden M, Radermacher R (1985) An experimental comparison of ammonia–water and ammonia–water–lithium bromide mixtures in an absorption heat pump. ASHRAE Trans 91(2B-2):1837–1846Google Scholar
  9. 9.
    Peters M, Greb R, Korinth O, Zimmermann CA (1995) Vapor-liquid-equilibria in the system NH3 + H2O + LiBr, part I: measurements in the range T = 303–423 K and p = 0.1–1.5 MPa. J Chem Eng Data 40(4):769–774Google Scholar
  10. 10.
    Peters R, Korinth C, Keller JU (1995) Vapor-liquid equilibria in the system NH3 + H2O + LiBr. Part II: data correlation. J Chem Eng Data 40(4):775–783Google Scholar
  11. 11.
    Wu Y, Chen Y, Tiehui W (2006) Experimental researches on characteristics of vapor–liquid equilibrium of NH3 + H2O + LiBr system. Int J Refrigerat 29:328–335Google Scholar
  12. 12.
    Sathyabhama A, Ashok Babu TP (2011) Experimental investigation in pool boiling heat transfer of ammonia/water mixture and heat transfer correlations. Int J Heat Fluid flow 32(3):719–729CrossRefGoogle Scholar
  13. 13.
    Sathyabhama A, Ashok Babu TP (2011) Experimental study of nucleate pool boiling heat transfer to ammonia–water–lithium bromide solution. Exp Therm Fluid Sci 35(6):1046–1054Google Scholar
  14. 14.
    Arima H, Monde M, Mitsutake Y (2003) Heat transfer in pool boiling of ammonia water mixture. Heat Mass Trans 39:535–543Google Scholar
  15. 15.
    Inoue T, Monde M, Teruya Y (2002) Pool boiling heat transfer in binary mixtures of ammonia and water. Int J Heat Mass Trans 45:4409–4415Google Scholar
  16. 16.
    Mostinski IL (1963) Application of the rule of corresponding states for calculation of heat transfer and critical heat flux. Teploenergetika 4:66Google Scholar
  17. 17.
    Patek J, Klomfar J (1995) Simple functions for fast calculations of selected thermodynamic properties of the ammonia-water system. Int J Refrig 18(4):228–234Google Scholar

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringMSRITBangaloreIndia

Personalised recommendations