Control Oriented Dynamic Model of the Bio-ethanol Processor System

Abstract

In this chapter the pseudo dynamic rigorous model of the Bio-ethanol Processor System and Proton Exchange Membrane Fuel Cell(BPS and PEMFC), working at the optimal efficiency point, is presented. It is based on the steady state HYSYS model given in the previous chapter and is able to deal with this kind of integrated plant for proposing and testing a suitable control structure. The model can be implemented thanks to the use of a specific communication protocol between the programs HYSYS and MATLAB to coordinate the calculations. The heat integration configuration is the same given in chapter 9. The optimal heat exchangers network is initially considered with a faster dynamic than the rest of units of the plant so as to simplify the solution of the problem. It allows assuming that the stream temperatures are instantaneously at their optimum values. Moreover, the dynamic behavior of the reactors and the PEMFC are modeled in MATLAB. The principal objectives given previously for the BPS and PEMFC can be tested here through the dynamic simulations. They are performed using the critical control loops defined through the sensitivity analysis presented in the previous chapter. The controllers tuning for doing the preliminary tests are done thanks to the obtention of black box models, using the simulated plant excited with step changes and recording the reaction curves data.