In this research the simulation of an air independent Proton Exchange Membrane Fuel Cell (PEMFC) propulsion system was taken into consideration. The system consists of several parts including PEM fuel cell stack, metal hydride and liquid oxygen (LOX) tanks, and also pre-heaters of oxygen and hydrogen gases along with other heat exchangers, to ensure proper operation of system. The heat recovery...

New proton exchange membrane (PEM) materials with high proton conductivities at elevated temperatures (ca. > 150 °C) offer the promise of improving PEM fuel cell operation. Higher operating temperatures would provide several benefits including: (i) improved resistance to carbon monoxide poisoning of the platinum (Pt) electrocatalyst at the anode, (ii) reduced need for feed-stream heat and humid...

In this paper, the problem of robust fault diagnosis in a PEM Fuel Cell (PEM FC) system is addressed. Fault detection is based on a LPV interval observer able to face the variations of parameters with the operating while preserving the linear structure of the model. At the same time, this approach addresses the robustness problem against modeling uncertainty included as unknown parameters whose...

The aim of this paper is the evaluation of the performance of a low pressure PEM (proton exchange membrane) fuel cell stack to step load changes, which are characteristic of standalone fuel cell system applications. The goal is a better understanding of the electrical behavior of the FC (fuel cell), as a result of the electrochemical processes, via the cell’s voltage characteristic during trans...

A silicon-based microfabricated fuel cell running on formic acid vapor as a fuel has been developed to provide on-chip power for MEMS devices, without using any ancillary devices such as heaters, water management, air pumps, etc. As a demonstration instrument, an integrated silicon-based membrane electrode assembly and fuel evaporative structure was packaged in a plastic package to test the vap...

Early and accurate fault detection and diagnosis for renewable energy systems can increase their safety and ensure the continuity of their service. This paper presents a comprehensive review of different fault detection and diagnosis methods for hybrid renewable energy systems consisting of a wind turbine power generator, a PV (photovoltaic) array, a PEM (polymer electrolyte membrane) fuel cell...

A dynamic fuel-cell model for high-temperature PEM fuel cells with PBI membranes has been developed in Simulink. In such models it is common to use the current density as input variable, but this model uses a different approach. The current density is regarded as an unrealistic control variable, since it cannot be controlled directly. Instead, it is possible to simulate the effect of changing t...

Impedance models were developed to account for reaction mechanisms that may be responsible for the inductive impedance response often seen at low frequencies in proton exchange membrane PEM fuel cells. Models that incorporate reactions without surface intermediates cannot account for these inductive features. Inductive loops can be predicted by models that account for formation of hydrogen pero...

this article tackles some ideas about parameters identification in the anode line of a typical PEM fuel cell test station. The approach is focused in the nonlinear model structure and solves an observation problem using a system transformation and Kalman filtering. Simulation results are presented to show the feasibility of the proposal.