车载甲醇重整制氢燃料电池系统建模与供氢管理

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

摘要:

针对车载甲醇重整制氢燃料电池汽车在实际运行过程中氢气需求问题，设计了面向控制的供氢策略。首先基于Matlab/Simulink平台，搭建了甲醇重整制氢燃料电池系统和整车仿真模型。结合实际工况中整车对燃料电池提出的动态功率需求，以甲醇消耗最低为目标，提出一种基于时间序列指数预测算法提前预知燃料电池耗氢速率进而实时调整重整系统的甲醇供应量的策略。C-WTVC工况仿真结果表明，该策略可使综合等效醇耗降低1.47%。此外，考虑到工况频繁变化会降低甲醇重整效率，进一步设计了一种基于规则的供氢管理策略，维持甲醇重整器运行在高效率区，C-WTVC工况下综合等效醇耗降低3.82%。

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%.