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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
Original

Abstract

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.

Keywords

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

FPF

Pressure correction factor

h

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

p

Pressure (bar)

q

Heat flux (W m−2 K−1)

T

Temperature (K)

x

Liquid phase mass fraction

y

Vapour phase mass fraction

Greek symbols

ΔT

Temperature difference (K)

Subscripts

bp

Boiling range

c

Critical property

id

Ideal

r

Reduced property

Notes

Acknowledgments

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.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringMSRITBangaloreIndia

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