Modeling and Hydrogen Supply Management of a Vehicle Onboard Methanol Reforming Fuel Cell System

Abstract:

Aimed at the hydrogen demand during the actual operation of the onboard methanol reforming hydrogen production fuel cell vehicle， a control-oriented hydrogen supply strategy is designed in this paper. First， based on MATLAB/Simulink， a methanol reforming hydrogen production fuel cell system and a vehicle simulation model are built. Combining the dynamic power requirement for the fuel cell in the actual working condition， with the goal of the lowest methanol consumption， a time series index prediction algorithm is proposed to predict the hydrogen consumption rate of the fuel cell in advance， and then adjust the methanol supply of the reforming system in real time. The simulation result of the C-WTVC cycle shows that this strategy can reduce the comprehensive equivalent alcohol consumption by 1.47%. In addition， taking into account the fact that frequent changes in vehicle cycle will reduce the efficiency of methanol reforming， a rule-based hydrogen supply management strategy is further designed to maintain the methanol reformer operating in a high-efficiency zone， and the comprehensive equivalent alcohol consumption under C-WTVC cycle is reduced by 3.82%.

Key words:methanol reforming fuel cell vehicle;methanol autothermal reforming;control system;hydrogen supply management