3.1.1. Strict Thermodynamic Model

The strict model is mainly used for the outer loop to correct the parameters in the approximate thermodynamic model, including the calculation of the phase equilibrium constant *K* value, and the vapor-liquid enthalpy di fference, as follows:

$$K\_{i,j} = K\_{i,j}(T\_{j'}P\_{j'}x\_{i,j'}, y\_{i,j}) \tag{12}$$

$$H\_j = H\_j(T\_{j\prime}P\_{j\prime}y\_{i,j})\tag{13}$$

$$h\_{\dot{j}} = h\_{\dot{j}}(T\_{\dot{j}}, P\_{\dot{j}}, x\_{i, \dot{j}}) \tag{14}$$
