λ	Water content
C.V.	Control volume of test Jig
$C_{H_{2}O}$	H2O molar mass, kg/kmol
$C_{S{O}_3^{-}}$	SO3—molar mass, kg/kmol
${\dot{m}}_v$	Vapor mass flow, kg/s
${\dot{m}}_a$	Air mass flow, kg/s
$\varphi$	Relative humidity
$P_s$	Saturation pressure, kPa
$P_a$	Air pressure, kPa
${\dot{m}}_{i1,dry}$	C.V. 1 inlet dry air, kg/s
${\dot{m}}_{per,mem}$	Water permeation through the membrane, kg/s
${\dot{m}}_{o1,dry}$	C.V. 1 outlet dry air, kg/s
${\dot{m}}_{o1,vap}$	C.V. 1 outlet vapor, kg/s
${\dot{m}}_{i2,wet}$	C.V. 2 inlet wet air, kg/s
${\dot{m}}_{o2,dry}$	C.V. 2 outlet dry air, kg/s
${\dot{m}}_{o2,vap}$	C.V. 2 outlet vapor, kg/s
$N_{w,diff}$	Molar flux, mol/cm2 s
${\rho }_{dry}$	Membrane dry density, g/cm3
$M_{mem}$	Equivalent weight of the membrane, g/mol
$D$	Diffusion coefficient, cm2/s
$\Delta Z$	Membrane thickness, cm
$A$	Membrane area, cm2
${\dot{m}}_{per,mem}^{"}$	Water flux through the membrane, kg/cm2 s