Multivariable Control Crude Oil Distillation Column and Optimization Energy Consumption

This research, presents control structure design using non-minimal state space proportional-integral plus (PIP-NMSS). The system identified by RIVID method using SIMULINK of MATLAB by applying CAPTAIN Toolbox in order to achieve system model. The multi input-multi output (MIMO) control structure developed for 8×8 square state system to keep side products quality. The energy cost optimization was done by defining of energy consumption as objective function. The results show that inlet vapor to main column has been reduced by 19.8%, vapor inlet of gasoil stripper column has been reduced by 10.22%, heat duty of naphtha stripper column has been reduced by 3.83% and heat duty of kerosene stripper column has been reduced by 3.41%, while 0.135% increase observed in furnace heat duty. Based on the results energy cost has been reduced by %8.5, whilst kept quality products.