Abstract:

Recently, proton exchange membrane fuel cell(PEMFC)as main power source of vehicles is widely concerned. Air compressor is one of important components in a PEMFC system and provides required oxygen and pressure for the cathode in electrochemical reactor of PEMFC. Its working performance has a great influence on the steady and dynamic performance of the fuel cell. Using a 150 kW proton exchange membrane fuel cell system in our laboratory, the working characteristics of its centrifugal air compressor are studied, and an application model for the air supplying system of the fuel cell is established, which involves the centrifugal air compressor. The results of experimental verification indicate that the simulation model can reflect accurately the characteristics of the centrifugal air compressor and the air supplying system. And the model can truly describe the steady control effect of the air system with the centrifugal air compressor in the large power PEMFC as well as the dynamic response of the different control strategies. The model provides theoretical support for the study of the air supply system of high power PEMFC and the corresponding control strategy. The simulation model and experimental results are an important basis and reference for the optimization of the next control strategy.

Key words: PEMFC, centrifugal air compressor, modeling, simulation, control

摘要：

近年来,质子交换膜燃料电池(PEMFC)作为车载燃料电池的主要动力源受到广泛关注。空气压缩机为电堆提供系统所需的氧气和阴极压力,是质子交换膜燃料电池系统中必不可少的一部分,其工作性能对燃料电池稳态和动态工作性能有很大的影响。基于实验室已有150 kW质子交换膜燃料电池系统,对离心式空压机的工作特性进行了研究,建立了包含离心式空气压缩机的空气供给系统应用模型。通过实验验证,仿真模型能够准确地反映离心式空压机与空气系统的特性,同时能真实反映包含离心式空压机的大功率质子交换膜燃料电池空气系统的稳态控制效果,以及不同控制策略下的动态响应效果。该模型对研究大功率质子交换膜燃料电池空气供给系统以及相应的控制策略提供理论支持,仿真模型与实验结果为下一步控制策略优化提供基础与参考。

关键词: PEMFC, 离心式空压机, 建模, 仿真, 控制