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Q_LiBrH2O
Procedure Q_LiBrH2O(h, P, z : Q, T, x) returns the quality, temperature and liquid composition of a 2-phase mixture of liquid lithium bromide-water and water vapor at specific enthalpy h, pressure P, and overall composition, z.
h is expected to be in the unit system EES has been configured to operate in which can be J/kg or kJ/kg
P is expected to be provided in the unit system EES has been configured to operate in, which can be Pa, kPa, bar, MPa, psia, or atm.
The compositions, z and x are assumed to be the lithium bromide mass fraction if EES is configured to operate with specific properties on a mass basis. If EES is configured to operate on a molar basis, z and x are assumed to be the lithium bromide mole fraction.
The temperature, T, is assumed to be in the temperature units specified in the EES Unit System dialog, which can be C, K, F, or K.
Q is the quality (or vapor fraction) on a mass basis.
The procedure uses relations from:
Patek, J. and Klomfar, J., Int. J. of Refrigeration, Vol 29, pp. 566-578, (2006)
"A computationally effective formulation of the thermodynamic properties of LiBr-H2O from 273 to 500 K over full composition range"
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Example:
$UnitSystem SI C kPa kJ mass
P[1]=10 [kPa]
P[2]=1 [kPa]
T[1]=70 [C]
x[1]=0.6
h[1]=h_LiBrH2O(T[1],x[1])
h[2]=h[1] "throttle to lower pressure"
z[2]=x[1]
call Q_LiBrH2O(h[2],P[2],z[2]: Q[2],T[2],x[2])
{Solution:
Q[2]=0.0146
T[2]=48.6 [C]
x[2]=0.6089}
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