Dual-time scale based extending of the benchmark Tennessee Eastman process

Abstract

Abstract The original Tennessee Eastman (TE) process which contains vapor-liquid phase is a single time scale simplified model. Dynamic equations associated with the vapor phase mass are usually ignored and treated as quasi-steady state, leading to the pressure completely depending on temperature. In this paper, to restore the true dynamic characteristics of the pressure, the inadequacy of single time scale and quasi-steady state model are firstly analyzed, and then a full dynamic modeling method for whole process of the TE process is proposed and full dynamic model is built. Finally, the simulation results of pressure and temperature between full dynamic model and quasi-steady state model only on the basis of mass balance control (pressure open-loop) are compared and analyzed to validate the effectiveness of dynamic modeling method.