Modeling and Analysis of Hydrogen Supply System With Dual Ejector Concept For Vehicular Proton Exchange Membrane Fuel Cell

Abstract

Abstract The performance of proton exchange membrane fuel cells (PEMFC) is significantly influenced by the hydrogen supply system (HSS). It typically consists of the hydrogen tank, the pressure regulator, the water separator, and the ejector, which is a vital component of the anodic recirculation system (ARS). As the vehicle’s operation necessitates a wide range of power output, the recirculation system must have an appropriate design to function accurately. A fixed-shape ejector is found to be tough to cover the whole range required. Furthermore, determining a suitable ejector geometry throughout the working conditions of the PEMFC is quite challenging. Therefore, the idea of applying the dual-ejector design in the ARS is introduced. In this study, using the concept of dual ejector ARS, the one-dimensional model of the whole hydrogen supply system integrated with the PEMFC is developed in MATLAB/Simulink platform. Design parameters are included in the ejector model so that the design analysis can be conducted. Therefore, the performance of the hydrogen supply system using the dual ejector concept is deployed under dynamic operation. The results show that the dual ejectors can well cover all operating ranges of a vehicular fuel cell. In addition, an improvement in stack performance is captured when utilizing the dual ejector-based anodic recirculation system.