Proton Exchange Membrane Fuel Cell(PEMFC) Lumped Modeling and Dynamic Performance Analysis

2011 ◽  
Vol 197-198 ◽  
pp. 719-723
Author(s):  
Qiu Hong Jia ◽  
Ming Han ◽  
Bin Deng ◽  
Cai Zhi Zhang ◽  
Yan Xiao
Keyword(s):  
Fuel Cell ◽  
Partial Pressure ◽  
Influence Factor ◽  
Dynamic Performance ◽  
Ideal Gas ◽  
Structure Design ◽  
Proton Exchange ◽  
Mixture Ratio ◽  
Lumped Model ◽  
Dynamic Performance Analysis

A model of PEMFC is developed that captures dynamic behavior for control purposes. It analyzes in detail the influence factor of voltage of PEMFC. The model is mathematically simple, and accounts for the essential phenomena that influence the PEMFC performance. The partial pressure of hydrogen and oxygen can be found using the laplace transform and differential form of ideal gas state equation. It is assumed that the mixture ratio of hydrogen and oxygen in the reaction are constant, the dynamic lumped model of PEMFC is proposed. The model is verified by comparing the experiment data with simulation result of model. On the basis of the dynamic model, the partial pressure and voltage are analyzed when when the load current suddenly changes.The research about lumped model has important significance to the research of the distributed generation network in various performances and has guiding meaning to the structure design of fuel cell.

Proton Exchange Membrane Fuel Cell Lumped Modeling and Simulation

2012 ◽  
Vol 462 ◽  
pp. 52-57
Author(s):  
Qiu Hong Jia ◽  
Ming Han ◽  
Lin Qing Liao ◽  
Yan Xiao
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Influence Factor ◽  
Ideal Gas ◽  
Proton Exchange ◽  
Ohmic Loss ◽  
Mixture Ratio ◽  
Lumped Model ◽  
Exchange Membrane ◽  
Lumped Modeling

It analyzes in detail the influence factor of voltage of proton exchange membrane fuel cell (PEMFC) when load changes sudden by the lumped modeling developed. The partial pressure of hydrogen and oxygen can be expressed using the ideal gas law equation, and ohmic loss, activation loss and concentration losses are accounted, it is assumed that both operating factor of hydrogen and mixture ratio of hydrogen and oxygen are constant. Based on the above, the dynamic lumped model of PEMFC is proposed. The correctness of model is verified by comparing the experiment data with simulation result of model. The research about lumped model has important significance to the research of the distributed generation network in various performances.

Research on the Kinematics Simulation of Out-Moving Jaw Crusher Based on Nastran

2013 ◽  
Vol 433-435 ◽  
pp. 63-66
Author(s):  
Jiang Yong
Keyword(s):  
Simulation Model ◽  
Simulation Analysis ◽  
Dynamic Performance ◽  
Theory Model ◽  
Structure Design ◽  
Side Plate ◽  
Jaw Crusher ◽  
Kinematics Simulation ◽  
Motion Characteristics ◽  
Dynamic Performance Analysis

In this paper, out-moving jaw crusher machine is regarded as the research object and we established the simulation model of virtual prototype based on Nastran. Through the simulation analysis of the movement process, trajectories of moving jaw side plate and a movable jaw toggle plate and related parameters were obtained and compared and verify the simulation model and theory model. The results show that: the simulation model reflects the motion characteristics of the theoretical model well. So it provides theoretical reference for improvement of dynamic performance analysis and structure design of jaw crusher and has important application value in engineering.

Structure design and dynamic performance analysis of a high speed miniature lathe

2013 ◽  
Vol 9 (2) ◽  
pp. 119
Author(s):  
Hua dong Yu ◽  
Li meng Wang ◽  
Xiao zhou Li ◽  
Jin kai Xu ◽  
Qing yong Shi
Keyword(s):  
Performance Analysis ◽  
High Speed ◽  
Dynamic Performance ◽  
Structure Design ◽  
Dynamic Performance Analysis

Five State Analytical Model of Proton Exchange Membrane Fuel Cell

2017 ◽  
Author(s):  
Milos Milanovic ◽  
Patrick Rose ◽  
Verica Radisavljevic-Gajic ◽  
Garrett Clayton
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Dynamic Control ◽  
State Space Model ◽  
Cell System ◽  
Ideal Gas ◽  
Proton Exchange ◽  
Unknown Parameters ◽  
Proposed Model ◽  
Exchange Membrane

In this paper a full nonlinear dynamic control oriented mathematical model of Proton Exchange Membrane (PEM) fuel cell system is developed. The model is structured as a nonlinear five state space model. The derivation of each state equation is based on physics fundamental principles using thermodynamic theory of ideal gas mixtures, conservation of mass law, flow dynamics in serpentine flow channels and diffusion. The output of proposed model, stack voltage, is developed from Nernst equation that includes three main types of losses occurring in the fuel cell. The unknown parameters of the model are estimated and fitted using sets of steady state experimental data. Stack polarization curve of the proposed model is validated by using sets of data for three different values of inlet pressures. Experimental setup used to attain data is the Greenlight Innovation G60 fuel cell test station system and TP50 Fuel Cell stack.

scholarly journals Simulation and Test of a Fuel Cell Hybrid Golf Cart

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Jingming Liang ◽  
Qifei Jian
Keyword(s):  
Fuel Cell ◽  
Cell Hybrid ◽  
Proton Exchange Membrane ◽  
Dynamic Performance ◽  
Proton Exchange ◽  
Fuel Cell Stack ◽  
Vehicle Simulator ◽  
Simulation Parameters ◽  
Exchange Membrane ◽  
Fuel Cell Hybrid

This paper establishes the simulation model of fuel cell hybrid golf cart (FCHGC), which applies the non-GUI mode of the Advanced Vehicle Simulator (ADVISOR) and the genetic algorithm (GA) to optimize it. Simulation of the objective function is composed of fuel consumption and vehicle dynamic performance; the variables are the fuel cell stack power sizes and the battery numbers. By means of simulation, the optimal parameters of vehicle power unit, fuel cell stack, and battery pack are worked out. On this basis, GUI mode of ADVISOR is used to select the rated power of vehicle motor. In line with simulation parameters, an electrical golf cart is refitted by adding a 2 kW hydrogen air proton exchange membrane fuel cell (PEMFC) stack system and test the FCHGC. The result shows that the simulation data is effective but it needs improving compared with that of the real cart test.

Validation and Calibration of a Proton Exchange Membrane Fuel Cell Model Against Dynamic Partial Pressure Data

2010 ◽  
Author(s):  
Arnab Roy ◽  
Ugur Pasaogullari ◽  
Michael W. Renfro ◽  
Baki M. Cetegen
Keyword(s):  
Experimental Data ◽  
Fuel Cell ◽  
Partial Pressure ◽  
Water Transport ◽  
Proton Exchange Membrane ◽  
Cell Model ◽  
Proton Exchange ◽  
Pressure Profiles ◽  
Model Predictions ◽  
Exchange Membrane

Transient experimental validation and investigation of the effect of diffusivity of porous layers on the dynamic water vapor partial pressure profiles of a proton exchange membrane fuel cell (PEMFC) during load change is presented. A three dimensional, isothermal, transient, single-phase computational fluid dynamics based model is developed to validate with the water partial pressure profiles experimentally measured during start-up conditions earlier in a 50 cm2 PEMFC having a single serpentine flow path in counter-flow configuration. The fluid flow within the serpentine channel geometry is simulated using a straight channel fuel cell model with total channel length equivalent to the stretched length of the entire serpentine path incorporating the same amount of pressure drop from inlet to outlet. The model equations are solved using a multi-domain approach incorporating water transport through membrane and multi-component species transport through porous diffusion layer. The transient model predictions of water partial pressure profiles of anode and cathode channels are found to be in good agreement within the error bounds of the experimental results. This validation is also indicative of the two different time scales i.e. initial anode dip due to electro-osmotic drag and recovery due to back diffusion from cathode to anode. Steady state model predictions are compared to check for accuracy simultaneously. The model also delineates the significance of effective diffusivity of porous Gas Diffusion Layers (GDL) and Catalyst Layers (CL) on transient characteristics. In order to come up with best parameters to validate with experimental data, a sensitivity analysis with parametric variations of effective porosity of GDL and CL is performed with a single experimental data set and then applied to the remaining sets. Results show that the CL diffusivity has a more pronounced effect on water accumulation as well as on temporal water transport than GDL diffusivity. The numerical simulation thus provides a validated set of quantitative model parameters along with an insight to the underlying physics of water transport phenomena in a PEMFC.

scholarly journals Dynamic performance of an in-rack proton exchange membrane fuel cell battery system to power servers

2017 ◽  
Vol 42 (15) ◽  
pp. 10158-10174 ◽  
Author(s):  
Li Zhao ◽  
Jacob Brouwer ◽  
Sean James ◽  
John Siegler ◽  
Eric Peterson ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Dynamic Performance ◽  
Proton Exchange ◽  
Battery System ◽  
Exchange Membrane

An Enhanced Fuel Cell Dynamic Model With Electrochemical Phenomena Parameterization as Test Bed for Control System Analysis

2019 ◽  
Vol 16 (3) ◽  
Author(s):  
Victor M. Fontalvo ◽  
George J. Nelson ◽  
Humberto A. Gomez ◽  
Marco E. Sanjuan
Keyword(s):  
Control System ◽  
Fuel Cell ◽  
Dynamic Response ◽  
Proton Exchange Membrane ◽  
System Analysis ◽  
Control Strategies ◽  
Dynamic Performance ◽  
Proton Exchange ◽  
Test Bed

In this work, a model of a proton exchange membrane fuel cell (PEMFC) is presented. A dynamic performance characterization is performed to assess the cell transient response to input variables. The model used in the simulation considers three different phenomena: mass transfer, thermodynamics, and electrochemistry. The main sources of voltage loss are presented: activation, electrical resistance, and concentration. The model is constructed to avoid the use of fitted parameters, reducing the experimentation required for its validation. Hence, the electrochemical model is parameterized by physical variables, including material properties and geometrical characteristics. The model is demonstrated as a test-bed for PEMFC control system design and evaluation. Results demonstrate that the steady-state and dynamic behavior of the system are represented accurately. A case study is included to show the functionality of the model. In the case study, the effect of the purge valves at the fuel cell discharges is analyzed under different scenarios. Regular purges of the cathode and the anode are shown to achieve a good performance in the system avoiding reactant starvation in the cell. A closed-loop dynamic response is included as an example of the model capabilities for the design of fuel cell control strategies. Two variables were selected to be controlled: voltage and pressure difference across the membrane. A multivariate control strategy was tested and its dynamic response was analyzed. It was found that there was a strong interaction between the control loops, making the control of the system a challenge.

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