基于热力学模型的PEMFC用喷射器的设计

发布时间：2018-09-19 06:11

【摘要】：根据气体的热力学方程,结合流体流动的连续性和动量能量的守恒方程,建立了一种质子交换膜燃料电池用亚音速喷射器热力学模型。从燃料电池的操作条件出发,设计了引射流体饱和增湿和不增湿两种对比工况,通过模型计算得到了两种工况下工作流体标准体积流量与喷嘴喉部直径、混合室截面直径的关系。根据模型计算结果设计了3.5 kW电堆用亚音速喷射器,并通过实验测试了该喷射器的引射性能。研究表明通过模型指导设计的喷射器具有良好的引射性能,同时针对水蒸气对引射系数的影响提出摩尔回流比的概念,可以更好地评价喷射器在质子交换膜燃料电池上的可使用性。
[Abstract]:A thermodynamic model of subsonic ejector for proton exchange membrane fuel cell (PEMFC) was established based on the thermodynamic equation of gas, the continuity of fluid flow and the conservation equation of momentum and energy. The relationship between the standard volume flow rate of the working fluid and the nozzle throat diameter and the cross section diameter of the mixing chamber under two working conditions is studied. A subsonic ejector for 3.5 kW reactor is designed according to the calculation results of the model. The ejection performance of the ejector is tested by experiment. The results show that the ejector designed by the model has good ejection performance. The concept of molar reflux ratio is proposed to evaluate the performance of the injector in PEMFC.
【作者单位】：中国科学院大连化学物理研究所;中国科学院大学;
【分类号】：TM911.4

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