Abstract
The hydrogen recirculation system is essential to the performance of the fuel cell system; the ejector device plays an important role in the hydrogen recirculation system. In this paper, a test platform which can simulate the fuel cell anode system is integrated for ejector performance testing. Based on the ejector test platform, an ejector device was tested under different operating conditions. The design of the ejector test platform, the test method and test process are introduced in detail. The test results of the ejector are compared with the Computational Fluid Dynamics (CFD) simulation results of different turbulence models. The results show that the standard k-e model is more accurate than other turbulence models at small and medium flow rates. At a large flow rate, the realizable k-e model has a higher simulation accuracy than other turbulence models.
Highlights
The Proton Exchange Membrane Fuel Cell (PEMFC) is an energy conversion device; it can provide power by means of an electrochemical reaction of hydrogen and oxygen
The purpose of this study is to find a new method for the fuel cell ejector test and a turbulence model suitable for ejector simulation
The research questions in this study focused on the design of the ejector test platform, the performance test of the ejector and turbulence model validation
Summary
The Proton Exchange Membrane Fuel Cell (PEMFC) is an energy conversion device; it can provide power by means of an electrochemical reaction of hydrogen and oxygen. Nitrogen and water from the cathode will permeate to the anode through the proton exchange membrane; it will hinder the diffusion of hydrogen in the gas diffusion layer if the gas does not flow in the anode, and it can cause fuel cell starvation. Mechanical pumps [11] or ejectors [12,13] are used for hydrogen recirculation, both of which have their advantages and disadvantages. Compared to the mechanical pump, ejectors have the advantages of silence, no power consumption, no relative moving parts and a reliable performance [14,15,16,17]
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