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Analysis of binary cryogenic mixtures containing nitrogen and Freon in cryocoolers

✍ Scribed by Mingyao Xu; Yaling He; Zhongqi Chen

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
359 KB
Volume
36
Category
Article
ISSN
0011-2275

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✦ Synopsis

Several new non-inflammable

binary cryogenic mixtures of nitrogen and Freon are suggested in this paper. The working mechanism of using these mixtures in a Joule-Thomson cryocooler is analysed according to thermodynamic theory. The Peng-Robinson equation of state is used to calculate the mixed free enthalpy of these mixtures and a method to calculate the mutual solubility is also suggested. Finally, the vapour-liquid equilibria, liquid-liquid equilibria and vapour-liquid-liquid equilibria of these mixtures are analysed. It is shown that the suggested mixtures can be used as alternatives to mixtures of nitrogen and alkanes or alkenes.

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