Vehicles powered by proton exchange membrane fuel cell have received lots of attention due to various merits. A comprehensive proton exchange membrane fuel cell power system with parallel-arranged heat recovery strategy for reactants preheating is proposed and investigated. Thermodynamic model of the system is established and is validated rigorously. In order to minimize system total exergy destruction, an acceptable interval of stream separation ratio for the parallel-arranged heat exchangers in this system varies from 0.01-0.90. Conventional and advanced exergy analyses of the system are presented. Real improvement potential of the proposed system is quantified: 46.42% of the total exergy destruction is avoidable, and the improvement priority orders are given: PEMFC stack >WP>AC>R>CHE>AHE>HC. It is found that a strong interaction exists in the system since 84% of the total exergy destruction is exogenous. Interactions of each component with the remaining components are analyzed. 87.97% of the exergy destruction in the stack is exogenous, which indicates that the improvement of auxiliary components will be effective to improve the system. This paper could provide directions for further improvement on the efficiency of this system and deeper understandings of interactions between the components.

由质子交换膜燃料电池驱动的车辆由于各种优点而备受关注。提出并研究了一种用于反应物预热的具有并行布置的热回收策略的质子交换膜燃料电池动力系统。建立了系统的热力学模型，并对其进行了严格的验证。为了最小化系统的总火用破坏，该系统中平行布置的热交换器的流分离比的可接受间隔在0.01-0.90之间变化。介绍了系统的常规和高级火用分析。拟议系统的实际改进潜力被量化：46.42％火用总破坏是可以避免的，并且给出了改进优先级顺序：PEMFC堆栈> WP> AC> R> CHE> AHE> HC。已发现系统中存在强大的相互作用，因为84％的总火用破坏是外源的。分析每个组件与其余组件的交互。烟囱中有87.7％的火用破坏是外源的，这表明辅助组件的改进将有效地改善系统。本文可以为进一步改善该系统的效率和更深入地了解组件之间的交互作用提供指导。