Dynamic modelling of the voltage prsponse of direct methanol fuel cells and stacks part I:Model development and validation

摘要

The transient response ofthe direct methanol fuel cell(DMFC)with liquid feed will be of particularimportance intransportation applications.To achieve effective control of acommercial system it is important to develop a methodology that accuratelypredicts the stack voltageusing a small number of sensors.An experimentalstudy of the dynamics of thedirect methanol fuel cell is described and used to develop an empirical modelof the cell dynamics.Teo cell systems,a small-scale single cell and a three-cell stack,form the basis of the experimental study.The cells weresubjected to a range ofdynamic loadsand operating conditions.Empirical dynamic models were then developed,using statespace canonical variates analysis,to predict the voltage response of the two systems from measurements of cell voltageand current.The models provided acceptable inferential and one-step-ahead predictions of the dynamic voltage response even though the systems never attain steady-state operation.