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In this study, the three-dimensional (3-D) transient cold start model is applied to the real-scale polymer electrolyte fuel cell (PEFC) geometry and transient cold-start simulations are carried out from subzero to normal temperatures. In order to reduce the computational turnaround time involving a large numerical mesh with millions of grid points, the cold(More)
In this investigation, a parametric study was performed using the transient cold-start model presented in our previous paper, in which the ice melting process and additional constitutive relations were newly included for transient cold-start simulations of polymer electrolyte fuel cells (PEFCs) from a sub-zero temperature (-20°C) to a normal operating(More)
A three-dimensional (3-D) transient non-isothermal model of VRFBs is developed by rigorously accounting for the electrochemical reactions of four kinds of vanadium ions (V<sup>2+</sup>, V<sup>3+</sup> VO<sup>2+</sup> and VO<sub>2</sub><sup>+</sup>) and resultant mass and heat transport processes. Particular emphasis is placed on analyzing various heat(More)
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