Manufacturing of High-Temperature Polymer Electrolyte Membranes—Part II: Implementation and System Model Validation

2009 ◽  
Vol 7 (1) ◽  
Author(s):  
Tequila A. L. Harris ◽  
Daniel F. Walczyk ◽  
Mathias M. Weber
Keyword(s):  
High Temperature ◽  
Polymer Electrolyte ◽  
Manufacturing System ◽  
Flow Behavior ◽  
Polymer Electrolyte Membrane ◽  
Theoretical Models ◽  
Polymer Electrolyte Membranes ◽  
Dynamics Modeling ◽  
Free Film ◽  
Electrolyte Membranes

In this paper, a complex system of theoretical models, which predicts flow rate as a function of pressure drop, formulated previously by Harris et al. (2007, “Manufacturing of High-Temperature Polymer Electrolyte Membranes—Part I: System Design and Modeling,” ASME J. Fuel Cell Sci. Technol., 7, p. 011007), are validated through a case study. Specifically, the flow behavior of a power law polymer electrolyte membrane solution, as it flows through a novel manufacturing system, is investigated. It is found that a strategic design methodology can be used to develop a complete manufacturing system to fabricate a defect free film. Moreover, the casting method offers significant improvements for the thickness uniformity of the membrane film, compared with film that is fabricated using scaled laboratory processes. The pressure losses predicted throughout the system are validated accordingly, not only from experimental results but also from computational fluid dynamics modeling.

Numerical Simulation of a High Temperature Polymer Electrolyte Membrane Fabrication Process

2010 ◽  
Vol 7 (6) ◽  
Author(s):  
K. L. Bhamidipati ◽  
T. A. L. Harris
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Flow Behavior ◽  
Polymer Electrolyte Membrane ◽  
Electrolyte Membrane ◽  
Membrane Fabrication ◽  
Electrolyte Membranes ◽  
Dynamics Models

Cost, durability, and reliability are the major issues hindering the commercialization of polymer electrolyte membrane fuel cells. Electrolyte membranes present in the fuel cell fails under chemical, thermal, and mechanical influences, which, in turn, results in the overall fuel cell failure. In the present work, 2D studies are performed to understand the effect of manufacturing processing conditions and materials on the quality of the high-temperature membranes. Multiphase computational fluid dynamics models are used for solving the flow behavior of a shear-thinning non-Newtonian fluid. The viscosity and velocities were found to have a profound effect on the membrane structure.

Manufacturing of High-Temperature Polymer Electrolyte Membranes—Part I: System Design and Modeling

2009 ◽  
Vol 7 (1) ◽  
Author(s):  
Tequila A. L. Harris ◽  
Daniel F. Walczyk ◽  
Mathias M. Weber
Keyword(s):  
High Temperature ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Design Methodology ◽  
Manufacturing System ◽  
Polymer Electrolyte Membranes ◽  
Cell Component ◽  
Power Law Fluid ◽  
The Past ◽  
Electrolyte Membranes

The most important component of the fuel cell is the membrane electrolyte, having the fundamental responsibility of separating protons and electrons. Minor defects (e.g., pin holes) in the film will cause premature and/or catastrophic failure. As such, special attention should be given to the manufacturing of this fuel cell component. Increased interest in identifying and overcoming the technical and manufacturing challenges associated with fuel cells has surfaced over the past few years. To this end, a design methodology, the science, and the technology to manufacture unique high-temperature polymer electrolyte membranes in a uniform and continuous manner are presented, specifically focusing on system conceptualization, design, and modeling. It has been shown that an overall manufacturing system can be designed for a power-law fluid with time-temperature varying properties.

Preparation and Investigation of Reinforced PVP Blend Membranes for High Temperature Polymer Electrolyte Membranes

2018 ◽  
Vol 19 (12) ◽  
pp. 2449-2457 ◽  
Author(s):  
Xiaorui Ren ◽  
Huanhuan Li ◽  
Ke Liu ◽  
Hongyi Lu ◽  
Jingshuai Yang ◽  
...  
Keyword(s):  
High Temperature ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membranes ◽  
Blend Membranes ◽  
Electrolyte Membranes

Simulation model of the fractal patterns in ionic conducting polymer films

Open Physics ◽  
2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Shahizat Amir ◽  
Nor Mohamed ◽  
Siti Hashim Ali
Keyword(s):  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Fractal Dimensions ◽  
Growth Patterns ◽  
Polymer Electrolyte Membranes ◽  
Electrolyte Membrane ◽  
Ionic Conducting ◽  
Electrolyte Membranes ◽  
Fractal Patterns ◽  
The Media

AbstractNormally polymer electrolyte membranes are prepared and studied for applications in electrochemical devices. In this work, polymer electrolyte membranes have been used as the media to culture fractals. In order to simulate the growth patterns and stages of the fractals, a model has been identified based on the Brownian motion theory. A computer coding has been developed for the model to simulate and visualize the fractal growth. This computer program has been successful in simulating the growth of the fractal and in calculating the fractal dimension of each of the simulated fractal patterns. The fractal dimensions of the simulated fractals are comparable with the values obtained in the original fractals observed in the polymer electrolyte membrane. This indicates that the model developed in the present work is within acceptable conformity with the original fractal.

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