Analyze of Impedance for Water Management in Proton Exchange Membrane Fue Fells Using Neural Networks Methodology

Abstract

The objective of this work is to define and to implement a simple method to assess the impacts of relative humidity and operating time on the fuel cell impedance. The method is based on the physical model of Randles with CPE and a mathematical tool for identifying various parameters based on the least squares’ method. The objective of the theoretical model development is the model implementation of the control system and water management of predictive diagnostics. Artificial neural networks are used to create the optimum impedance model. The model is applied for the identification of all resistors (internal resistors measured at high frequency, biasing resistors measured at high frequency) which are characterized by a high sensitivity for both cases, the flooding or drying of the cell heart (membrane and electrodes). This model is able to easily generate Nyquist diagram for any condition of relative humidity and operating time, it helped define the stack hydration status. Based on the obtained results, the model demonstrated a best flexible response, accurate and fast. The developed model can be integrated into a water management control system in PEM fuel cells.

Technique of control PMSM powered by PV panel using predictive controller of DTC-SVM

“…A PV generator is made up of interconnected modules to form a unit producing high continuous power compatible with conventional electrical equipment [19]. The used model is shown in Figure .1, which consists of four components: a current generator I ph , a diode, a parallel resistance R sh and a serial resistance R se [20].…”

Three-Dimensional Numerical Study of the inlet Temperature Effects on the Performance of Planar PEMFCs

“…In this work, and in a continuation of our previous work on the fuel cells [28][29][30][31][32][33][34][35][36][37][38][39], a three-dimensional (CFD) model is considered to study the impact of the inlet temperature on the current density, power density, pressure and hydrogen, oxygen, and water mass fractions' distributions of a single straight channel PEMFC. The considered three-dimensional model is supposed non-isothermal, single-phase steady-state and the domain of study is limited by a single PEMFC cell with straight channels according to co-flow arrangements.…”

Energy Recovery by Production of Electricity from Anaerobic Digestion of Organic Waste in the Saharan Environment

“…Municipal waste, assessed with a global production of 2.01 billion tonnes per year according to World Bank estimates in 2018 [1], cause damage to the environment and people. This catastrophic situation is accompanied by growing energy needs over 121,000 TWh per year in 2050 [2].…”