Development and performance test of a miniature movable mixed-refrigerant liquid nitrogen generator

Wang, Haocheng; Guo, Hai‐Yang; Zhao, Yanxing; Chen, G.F.; Gong, Maoqiong

doi:10.1016/j.cryogenics.2018.09.013

Cited by 7 publications

(1 citation statement)

References 15 publications

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“…Propane and isobutane can be changed by R218. Even though R14 and R218 have high global warming potential (GWP), they are still important in nonflammable mixed refrigerants. , In addition, phase equilibria of mixtures containing hydrofluorocarbons are of great scientific value because of the peculiar phase behavior, such as azeotropic and vapor–liquid–liquid equilibrium, that often occurs. − …”

Section: Introductionmentioning

confidence: 99%

Isothermal Vapor–Liquid Equilibrium for the Tetrafluoromethane (R14) + Octafluoropropane (R218) Binary Mixture at Five Temperatures from 173.150 to 213.150 K

Wang

Zhao

et al. 2022

J. Chem. Eng. Data

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Tetrafluoromethane (R14) and octafluoropropane (R218) are essential nonflammable refrigerants for mixed-refrigerant Joule Thomson refrigerators. In this paper, the vapor–liquid equilibrium (VLE) data were acquired for the R14 + R218 binary mixture from 173.150 to 213.150 K by a vapor-phase single-cycle method. The VLE data were regressed by the Soave–Redlich–Kwong (SRK) equation of state plus van der Waals (vdW) mixing rule model (SRK-vdW) and the Soave–Redlich–Kwong (SRK) equation of state combined with modified Huron–Vidal first-order (MHV1) mixing rule plus non-random two liquids (NRTL) activity coefficient model (SRK-MHV1-NRTL). The maximum average absolute relative deviation of pressure (AARDp) and the maximum average absolute deviation of vapor-phase mole concentration (AADy) are 2.42% and 0.0019 for the SRK-vdW model, respectively. A better correlation result was obtained by the SRK-MHV1-NRTL model, and the maximum AARDp and AADy are 1.04% and 0.0019, respectively. Based on the experimental and calculated results, a strong non-azeotropic behavior was found.

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