Skip to main content
SpringerLink
Log in

Evaporation of NH3 in NH3/H2 atmosphere by 25 bar for neutral gas absorption refrigeration units

  • Published:
Forschung im Ingenieurwesen A Aims and scope Submit manuscript

Abstract

The present work considers the evaporation process ofNH 3 inNH 3/H2 atmosphere, that takes place in neutral gas absorption refrigeration units. The data obtained are used to calculate the “psychrometric problem” and the evaporation process within an insulated tube. The “psychrometric problem” deals with the determination of the mass fraction of theNH 3/H 2 gas mixture from known “dry” and “wet bulb” temperatures for Lewis numbers not equal to one. The results are in good agreement with some existing experimental data.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. B.D. Spalding: Convective mass transfer. London: Edward Arnold LTD, 1963.

    MATH  Google Scholar 

  2. F. Bošnjaković: Technische Thermodynamik. Teil II. Dresden: Verlag Theodor Steinkopff 1971.

    Google Scholar 

  3. D.A. Kouremenos andA. Sagia: Thermodynamic and transport properties of the NH3−H2 mixtures. International VDI-Seminar “ORC-/Heat-Pumps-Technology”, Zürich 1984, pp. 193/207.

  4. D.A. Kouremenos: Evaporation in absorption refrigeration. Unpublished experimental data.

  5. G. Kortüm: Einführung in die Chemische Thermodynamik, 4. Auflage. Vandenhoeck und Reprecht in Göttingen, Verlag Chemie GmbH, Weinheim/Bergstr. 1963.

    Google Scholar 

  6. J.M. Smith andH.C. van Ness. Introduction to chemical engineering thermodynamics, 3rd Edition. International Student Edition 1975.

  7. J. Hilsenrath, H.J. Hoge, C.W. Beckett, J.F. Masi, W.S. Benedict, R.L. Nuttal, L. Fano, Y.S. Touloukian andH.W. Woolley: Tables of thermodynamic and transport properties of air, Ar, CO2, CO, H2, N2, O2 and steam. Pergamon Press 1960.

  8. A. Stegou-Sagia: NH3 evaporation in H2 25 bar. Ph. D. Thesis. Mechanical Engineering Department N.T.U.A. 1985.

  9. J.O. Hirschfelder, R.B. Bird andL.E. Spotz: Viscosity and other physical properties of gases and gas mixtures. Trans. ASME 71 (1949) pp. 921/37.

    Google Scholar 

  10. D.A. Kouremenos: The thermodynamic properties of ammonia-hydrogen gas mixtures; a temperature-mass fraction diagram for evaporation purposes. XIII International Congress of Refrigeration. IIR 1973, Vol. 2, pp. 437/43.

  11. D.A. Kouremenos andB.A. Hatziandreou: Thermodynamic and transport properties of NH3−H2 mixtures at 25 bar. 16th International Congress of Refrigeration 1983, Paris. Comission B1, pp. 521/27.

  12. A.K. Pal andA.K. Barua: Viscosity of hydrogen-nitrogen and hydrogen-ammonia gas mixtures. J. Chem. Phys. Vol. 47 (1967) pp. 216/18.

    Article  Google Scholar 

  13. Landolt andBörnstein: Zahlenwerte und Funktionen. II. Band. 5. Teil/Bandteil b. Transportphänomene II—Kinetik Homogene Gasgleichgewichte, pp. 54, 55, 59. Berlin, Heidelberg, New York: Springer-Verlag 1968.

    Google Scholar 

  14. Landolt andBörnstein: Zahlenwerte und Funktionen. II. Band. 5. Teil/Bandteil b. Transportphänomene—Kinetik Homogene Gasgleichgewichte. Transportphänomene I (Viskosität und Diffusion), p. 72. Berlin, Heidelberg, New York: Springer-Verlag 1969.

    Google Scholar 

  15. M. Trautz, K.G. Sorg andF.W. Stauf: Annal. Physik 2 (1909) p. 737; 10 (1931) p. 81.

    Google Scholar 

  16. D.A. Kouremenos: Lewis'scher Faktor, Viskosität, Diffusionszahl und Wärmeleitfähigkeit von H2/NH3 Gasgemischen bei 25 ata. Kältetechnik-Klimatisierung Vol. 20 (1968) Nr. 10.

  17. ASHRAE Guide and Data Book: Fundamentals and equipment. ASHRAE New York, N.Y. 1963.

  18. National Bureau of Standards: Circular No. 142 (1945).

  19. National Bureau of Standards: Circular No. 472 (1948).

  20. Thermodynamic and physical properties of ammonia-R717-1981. Institut International Du Froid. Organisation Intergouvernementale. 177 Boulevard Malesherbes F-75017 Paris, France.

  21. J.G. Knudsen andD.L. Katz: Fluid dynamics and heat transfer. International Student Edition. Inc. New York, Toronto, London: McGraw-Hill Book Company 1958.

    MATH  Google Scholar 

  22. D.A. Kouremenos andA. Stegou-Sagia: Psychrometric problem and evaporation of NH3 in H2 25 bar. Proceedings of the International AMSE Conference on Modelling and Simulation, Monastir Tunisia, 1985.

Download references

Author information

Authors and Affiliations

  1. Mechanical Engineering Dept., Thermal Section, National Technical University of Athens, Athens, Griechewland

    Dimitrios A. Kouremenos (Professor of Thermodynamics) & Athina Stegou-Sagia (Research Assistant)

Authors
  1. Dimitrios A. Kouremenos
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Athina Stegou-Sagia
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kouremenos, D.A., Stegou-Sagia, A. Evaporation of NH3 in NH3/H2 atmosphere by 25 bar for neutral gas absorption refrigeration units. Forsch Ing-Wes 52, 153–161 (1986). https://doi.org/10.1007/BF02560922

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02560922

Keywords

Search

Navigation