3D Modeling of Polymer Electrolyte Fuel Cell and Hydride Hydrogen Storage Tank

2010 ◽  
Author(s):  
Yun Wang
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Heat Transport ◽  
Dynamic Models ◽  
Cell Model ◽  
Polymer Electrolyte Fuel Cells ◽  
Water Dynamics ◽  
Polymer Electrolyte Fuel Cell ◽  
Hydride Hydrogen ◽  
Electrochemical Double Layer

3D dynamic models are developed for polymer electrolyte fuel cells (PEFCs) and hydrogen tanks, respectively. In the fuel cell model, we consider the major transport and electrochemical processes within the key components of a single PEFC that govern fuel cell transient including the electrochemical double-layer behavior, mass/heat transport, liquid water dynamics, and membrane water uptake. As to modeling hydrogen tanks, we consider a LaNi5-based system and develop a general formula that describes hydrogen absorption/desorption. The model couples the hydride reaction kinetics and mass/heat transport. The dynamic characteristics of the PEFC and hydrogen tank, together with the possible coupling of the two systems, are discussed.

Dynamic Characteristics of Polymer Electrolyte Fuel Cell and Hydrogen Tank

2010 ◽  
Author(s):  
Yun Wang
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Dynamic Characteristics ◽  
Dynamic Models ◽  
Reaction Rates ◽  
Transport Processes ◽  
Water Dynamics ◽  
Polymer Electrolyte Fuel Cell ◽  
Limiting Factors ◽  
Electrochemical Double Layer

In this paper, we develop 3D dynamic models for polymer electrolyte fuel cells (PEFCs) and hydrogen tanks, respectively. The PEFC model considers the key components of a single PEFC and couples the various mechanisms that govern fuel cell transient including the electrochemical double-layer behavior, species transport, heat transfer, liquid water dynamics, and membrane water uptake. The hydrogen tank model includes a 3D description of the hydrogen discharging kinetics coupled with mass/heat transport in a LaNi5–based hydrogen tank. Efforts are made to discuss the dynamic characteristics of the PEFC and hydrogen tank together with the possible coupling of the two systems. Local electrochemical and hydride reaction rates, transport processes and associated limiting factors are investigated.

Transients of Polymer Electrolyte Fuel Cell and Hydrogen Tank

2009 ◽  
Author(s):  
Yun Wang ◽  
Xiaoguang Yang
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Dynamic Models ◽  
Cell Voltage ◽  
Polymer Electrolyte Fuel Cells ◽  
Dynamic Responses ◽  
Polymer Electrolyte Fuel Cell ◽  
Electrochemical Double Layer ◽  
The One

This paper seeks to develop 3D dynamic models for polymer electrolyte fuel cells (PEFCs) and hydrogen tanks, respectively. The dynamic model of PEFCs consists of multiple layers of a single PEFC and couples the various dynamic mechanisms in fuel cells, such as electrochemical double-layer discharging/charging, species transport, heat transfer, and membrane water uptake. The one of hydrogen tanks includes a 3D description of the hydride kinetics coupled with mass/heat transport in the hydrogen tank. Transient of fuel cell during step change in current is simulated. Dynamic responses of the cell voltage and heat generation rate are discussed. Hydrogen absorption process in the tank is considered. Temperature, reaction rate and heat rejection in the fuel tank are presented. Efforts are also made to discuss the coupling of these two systems in practice and associated issues.

Numerical Studies of Heat Transport for Polymer Electrolyte Fuel Cell Stack in Sub-Freezing Environment

2009 ◽  
Author(s):  
Pengtao Sun ◽  
Su Zhou
Keyword(s):  
Heat Transfer ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Heat Transport ◽  
Numerical Solutions ◽  
Polymer Electrolyte Fuel Cell ◽  
Fuel Cell Stack ◽  
Finite Volume Discretization ◽  
Heat Transport Equation ◽  
Heating Up

Two cases of heat transfer processes for a general polymer electrolyte fuel cell (PEFC) stack in a sub-freezing environment are studied in this paper: cooling-down and heating-up. We investigate the time consumption problem for both of these two cases in order to find the way to normally restart fuel cell stack without regard to electrochemical reaction. We consider the action of heat transfer in lieu of generated chemical energy to PEFC in sub-freezing environment by means of heat insulator. In the numerical simulation, we define a combined finite element/upwind finite volume discretization to approximate the heat transport equation for different cases of heat transport process, and obtain the stable and reasonable numerical solutions. These results correspondingly provide explicit ways to preserve heat in PEFC stack in the sub-freezing environment.

Wetting properties of porous high temperature polymer electrolyte fuel cells materials with phosphoric acid

2019 ◽  
Vol 21 (24) ◽  
pp. 13126-13134 ◽  
Author(s):  
J. Halter ◽  
T. Gloor ◽  
B. Amoroso ◽  
T. J. Schmidt ◽  
F. N. Büchi
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Phosphoric Acid ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cells ◽  
Polymer Electrolyte Fuel Cell ◽  
Wetting Behavior ◽  
Wetting Properties ◽  
Fuel Cell Materials

The influence of phosphoric acid temperature and concentration on the wetting behavior of porous high temperature polymer electrolyte fuel cell materials is investigated.

scholarly journals On a Pioneering Polymer Electrolyte Fuel Cell Model

2010 ◽  
Vol 19 (1) ◽  
pp. 47-49
Author(s):  
Jeremy P. Meyers ◽  
Adam Z. Weber
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Cell Model ◽  
Polymer Electrolyte Fuel Cell

Polymer Electrolyte Fuel Cell Model

1991 ◽  
Vol 138 (8) ◽  
pp. 2334-2342 ◽  
Author(s):  
T. E. Springer ◽  
T. A. Zawodzinski ◽  
S. Gottesfeld
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Cell Model ◽  
Polymer Electrolyte Fuel Cell

Development of Small Fish Robots Powered by Small and Ultra-Light Passive-Type Polymer Electrolyte Fuel Cells

2010 ◽  
Vol 22 (2) ◽  
pp. 150-157 ◽  
Author(s):  
Yogo Takada ◽  
◽  
Ryosuke Araki ◽  
Yukinobu Nakanishi ◽  
Motohiro Nonogaki ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Rechargeable Batteries ◽  
Polymer Electrolyte Fuel Cells ◽  
Polymer Electrolyte Fuel Cell ◽  
Small Fish ◽  
Fish Robot ◽  
Disaster Victims ◽  
Neodymium Magnets ◽  
Flooded Areas

Small fish robots, the size of a killifish – 5 cm long – are potentially in finding disaster victims in flooded areas, because of their ability to navigate narrow confines. Powering such robots, however, becomes a question, since the easiest answer – rechargeable batteries – has low energy density. The “Power Tube” we developed is a small and ultra-light passive-type polymer electrolyte fuel cell. Based on this fuel cell technology, we fabricated a 110 mm fish robot combining a drive, consisting of a DC motor and link, with a Power Tube having a hydrogen generator. We also fabricated an energy-efficient submersible fish robot with neodymium magnets and coil actuators, that methanol-fueled Power Tubes powered with a voltage booster.

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