Predicting Gas Transport Coefficients of Alternative Refrigerant Mixtures

2006 ◽  
Vol 45 (26) ◽  
pp. 9211-9223 ◽  
Author(s):  
J. Moghadasi ◽  
D. Mohammad-Aghaie ◽  
M. M. Papari
Keyword(s):  
Gas Transport ◽  
Transport Coefficients ◽  
Alternative Refrigerant ◽  
Refrigerant Mixtures

scholarly journals Characterization of Selected Parameters of Organic-Inorganic Hybrid Membranes Based on Various Polymers and Nd-Fe-B Fillers

2016 ◽  
Vol 61 (4) ◽  
pp. 1825-1832 ◽  
Author(s):  
A. Rybak ◽  
Au. Rybak ◽  
W. Kaszuwara
Keyword(s):  
Gas Transport ◽  
Transport Coefficients ◽  
Time Lag ◽  
Rheological Parameters ◽  
Powder Particle Size ◽  
Hybrid Membranes ◽  
Magnetic Powder ◽  
Inorganic Hybrid ◽  
Powder Addition

Abstract In this paper magnetic organic-inorganic hybrid membranes based on EC, PPO polymer matrices and various magnetic powder microparticles were synthesized and studied. Constant pressure permeation technique and the Time Lag method were used to obtain the gas transport coefficients. The mechanical, rheological and magnetic parameters of magnetic hybrid membranes were examined. It was found that their separation and gas transport properties (D, P, S and α) were improved with the decrease in powder particle size and the increase of membrane’s remanence, saturation magnetization and magnetic particle filling. The increase of the magnetic powder addition and a decrease of its granulation improved also mechanical and rheological parameters of the tested membranes. This improvement also had a positive effect on their gas separation properties and their potential usage in the future.

Determination of gas transport coefficients in ceramic bodies during thermolysis of organic additives

1996 ◽  
Vol 41 (3) ◽  
pp. 116-128 ◽  
Author(s):  
J. H. Song ◽  
J. R. G. Evans ◽  
M. J. Edirisinghe ◽  
E. H. Twizell
Keyword(s):  
Gas Transport ◽  
Transport Coefficients ◽  
Organic Additives

Gas Transport Coefficients of Phthalide-Containing High-Tg Glassy Polymers Determined by Gas-Flux and NMR Measurements

2015 ◽  
Vol 48 (8) ◽  
pp. 2585-2592 ◽  
Author(s):  
Carolina García ◽  
Ángel E. Lozano ◽  
José G. de la Campa ◽  
Yakov Vygoskii ◽  
Mihail Zolotukhin ◽  
...  
Keyword(s):  
Gas Transport ◽  
Transport Coefficients ◽  
Glassy Polymers ◽  
Gas Flux

scholarly journals Determination of the potential energy surfaces of refrigerant mixtures and their gas transport coefficients

2017 ◽  
Vol 21 (6 Part B) ◽  
pp. 2851-2858
Author(s):  
Bo Song ◽  
Xiaopo Wang ◽  
Zhigang Liu
Keyword(s):  
Potential Energy ◽  
Potential Energy Surfaces ◽  
Transport Coefficients ◽  
Viscosity Coefficient ◽  
Viscosity Data ◽  
Binary Diffusion Coefficient ◽  
Temperature Range ◽  
Refrigerant Mixtures ◽  
Energy Surfaces

In this work, the inversion scheme was used to determine the potential energy surfaces of five polar refrigerant mixtures. The systems studied here are R123-R134a, R123-R142b, R123-R152a, R142b-R134a, and R142b-R152a. The low density transport coefficients of the refrigerant mixtures were calculated from the new invert potentials by the classical kinetic theory. The viscosity coefficient, binary diffusion coefficient, and thermal diffusion factor were computed for the temperature range from 313.15-973.15 K. The agreement with the NIST viscosity data demonstrates that the present calculated values are accurate enough to supplement experimental data over an extended temperature range. Correlations of the transport properties were also provided for the refrigerant mixtures at equimolar ratios.

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