Gunakan slider di bagian atas untuk mengontrol parameter berikut:
Amati perubahan real-time pada:
A component and overall mole balance are performed:
$$n_i^F = n_i^L + n_i^V$$
$$n^F = n^L + n^V$$
where $n$ is the number of moles, the superscripts $F$, $L$, and $V$ refer to the feed, liquid and vapor streams and the subscript $i = m$ or $w$ refers to a component (methanol or water).
Overall and component energy balances with the reference state $T_{ref} = 25^\circ\text{C}$ and $P_{ref} = 1\text{ bar}$:
$$H_{in} = H_{out}$$
$$H^F = H^L + H^V$$
$$H_i^F = H_i^L + H_i^V$$
where $H$ is enthalpy ($\text{kJ}$).
The enthalpies of each stream are calculated using heat capacities $Cp$ ($\text{kJ/(mol K)}$) and heat of vaporization $\Delta H^{vap}$ ($\text{kJ/mol}$):
$$H^F = \sum n_i^F C_{p,i}^L (T_{in} - T_{ref})$$
$$H^L = \sum n_i^L C_{p,i}^L (T_{out} - T_{ref})$$
$$H^V = \sum n_i^V \left( C_{p,i}^V (T_{out} - T_{ref}) + \Delta H^{vap}_i \right)$$
The flash drum has a single equilibrium stage, so the exiting liquid and vapor streams are at the same temperature, $$T_{out}$$.
Saturation pressure $$P^{sat}$$ of the components in vapor-liquid equilibrium is calculated using the Antoine equation:
$$P_i^{sat} = 10^{A_i - \frac{B_i}{T + C_i}}$$
where $$ A_i, B_i, and C_i $$ are Antoine constants for each component, and $$P^{sat}$$ is in bar.
Raoult's law is used for the exit streams to find the vapor-liquid equilibrium compositions:
$$x_i P_i^{sat} = y_i P$$
where $$ x_i and y_i $$ are the liquid and vapor mole fractions. The sum of the mole fractions times their saturation pressures is the total pressure $$P = x_m P_m^{sat} + x_w P_w^{sat}$$.
Simulasi ini diadaptasi dan diimplementasikan ulang secara independen dari demo "Adiabatic Flash Drum with Binary Liquid Feed" milik LearnChemE (learncheme.github.io), yang dikembangkan oleh Departemen Teknik Kimia dan Biologi, University of Colorado Boulder, dengan dukungan National Science Foundation (NSF).
Konstanta fisik (Antoine, kapasitas panas, panas laten) pada versi ini diselaraskan dengan nilai pada demo aslinya agar hasil perhitungan sedekat mungkin dengan sumber rujukan.