甲醇重整制氢PEMFC系统余热分析

Thermal analysis of methanol reforming proton exchange membrane fuel cell system

甲醇重整质子交换膜燃料电池系统主要包括了甲醇重整制氢模块、氢气提纯模块、电堆模块以及电转换模块等,现有系统发电效率能够高达30%,使用热电联产后理论效率能达到70%,因此有必要对系统内部余热情况进行研究。基于甲醇重整质子交换膜燃料电池系统实验台,分析了平稳运行时系统内部产生的理论余热量,并详细计算了在不同输出功率下系统运行产生的实际余热量,结合理论计算进行对比,提出系统余热利用以及进一步优化的方向。

Methanol reforming proton exchange membrane fuel cell system is composed of methanol reforming module,hydrogen purification module, fuel cell stack module and electric conversion module, etc. Power generating efficiency of existing systems can reach to 30%, and theoretical efficiency of whole system will be more than 70% when CHP is added, so it is important to study the afterheat-status of the system. Based on the Methanol reforming PEMFC system, the theoretical calculation of afterheat was compared with actual value of afterheat of the system, which smoothly ran under different output-power conditions. The direction of waste-heat utilization and optimization of the whole system were proposed.