Abstract
In this paper, a method to improve the performance of PEMFCs using porous material as a flow channel baffle is proposed. The results show that PEMFCs with four porous baffles flow channels have better performance at high current density compared with the traditional flow channel. The structural parameters of the flow channel explored in this study include porosity, the thickness of the baffle and the number of baffles, and their influence on the performance of PEMFCs. Sensitivity analysis results show that the performance of the PEMFCs with the porous baffle channel is the most sensitive to baffle thickness, and the thickness and baffle could be appropriately adjusted. The number of plates and porosity of the baffle are adjusted to improve the performance of the PEMFCs.
Highlights
With the increase in environmental pollution and the shortage of fossil fuels, it has become urgent to find clean and recyclable energy sources to replace fossil energy [1,2]
Proton exchange membrane fuel cells (PEMFCs) have been used in many fields such as vehicles, portable power systems, and stationary power stations
The results show that compared with the square cross-section channel, the trapezoidal interfacial channel reduces the accumulation of liquid water in porous media to a certain extent and significantly improves the performance of PEMFCs
Summary
With the increase in environmental pollution and the shortage of fossil fuels, it has become urgent to find clean and recyclable energy sources to replace fossil energy [1,2]. The results show that compared with the square cross-section channel, the trapezoidal interfacial channel reduces the accumulation of liquid water in porous media to a certain extent and significantly improves the performance of PEMFCs. Wang et al [4] studied the structural parameters of serpentine channels by establishing a three-dimensional numerical model. The effects of this new design on the performance of PEMFCs were studied, including the average current density and voltage. The effects of this new design on the performance of PEMFCs. Appl. (1) The reaction gas is the ideal gas equation; (2) The gas flow in the PEMFC is laminar flow; (3) The porosity, conductivity, and permeability of the GDL and CL is isotropic; (4) The contact resistance between the layers is ignored; (5) Gravity is ignored; (6) Only protons can pass through the proton exchange membrane; (7) The system is ideal and binary
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