Zusammenfassung
The present work considers the thermodynamic and transport properties of theHe/NH 3 gas mixture. The values obtained assume virial form of the equation of state. The existing experimental data have been used too. A detailed calculation of the second virial coefficients is presented taking in account the quantum effects interactions. The results obtained are valid for a total pressure of25 bar and a temperature range of −40°C to +50°C.
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Abbreviations
- B :
-
Second virial coefficient
- B ⋆ :
-
Reduced second virial coefficient
- B ⋆ k :
-
Dimensionless derivative
- B 11[cm3/Mol]:
-
Second virial coefficient of ammonia
- B 22[cm3/Mol]:
-
Second virial coefficient of Helium or Hydrogen
- B 12[cm3/Mol]:
-
Cross second virial coefficient
- C :
-
Third virial coefficient
- C ⋆ :
-
Reduced third virial coefficient
- C ⋆ k :
-
Dimensionless derivative
- h :
-
Planck's constant
- k :
-
Boltzmann's constant
- m :
-
Mass of a particle
- N :
-
Loschmidt number
- r :
-
Distance of molecules
- T :
-
Temperature
- v :
-
Molar volume
- Z :
-
Compressibility factor
- ε:
-
Energy of interaction
- Λ* :
-
De Broglie wavelength\(\left( {{h \mathord{\left/ {\vphantom {h \sigma }} \right. \kern-\nulldelimiterspace} \sigma }\sqrt {m\varepsilon } } \right)\)
- σ:
-
Molecule's diameter
- φ(r):
-
Lennard-Jones (6–12) potential
- *:
-
Quantity reduced by means of the simplest combinations of molecular parameters σ and ε
- ⋆:
-
Quantity reduced by means of combinations of σ and ε which utilize rigid sphere values
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Kouremenos, D.A., Stegou-Sagia, A. & Krikis, R. Quantum effects and properties of the Helium-Ammonia mixture for neutral gas absorption refrigeration. Forsch Ing-Wes 55, 110–116 (1989). https://doi.org/10.1007/BF02574980
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DOI: https://doi.org/10.1007/BF02574980