Dynamic Component and Energy Balances

A lumped model of the pervaporation unit is used to describe the dynamic behavior. Three cells are assumed in each pervaporation module. Since the liquid retentate provides most of the capacitance of the pervaporation unit, the ordinary differential equations describing the dynamic changes compositions and temperature of the retentate in each cell are used. The molar holdup in each cell Mr is assumed constant, so the total molar balance is algebraic. 

Fp n = molar flowrate of liquid retentate from cell n (kmol/h) 

Fp n = molar flowrate of vapor permeate from cell n (kmol/h) hp = molar enthalpy of liquid retentate in cell n (GJ/kmol) 

Hp = molar enthalpy of vapor permeate leaving cell n (GJ/kmol) 

IntegerParameter (Description Number of cross flow cells )  

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