A5083668812- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advanced Mathematical Modeling in Engineering
- Supercapacitor Materials and Fabrication
- Adhesion, Friction, and Surface Interactions
- Surface Modification and Superhydrophobicity
- Additive Manufacturing and 3D Printing Technologies
- Advanced Battery Technologies Research
- Advanced Materials and Mechanics
- Rheology and Fluid Dynamics Studies
- Heat and Mass Transfer in Porous Media
- Advanced Memory and Neural Computing
- Advancements in Solid Oxide Fuel Cells
- Heat Transfer and Optimization
- Polymer Nanocomposites and Properties
- Photopolymerization techniques and applications
- Advanced battery technologies research
- Composite Material Mechanics
Norwegian University of Science and Technology
2019-2023
Trondheim Kommune
2020
Flow field designs for the bipolar plates of proton exchange membrane fuel cell are reviewed; including serpentine, parallel, interdigitated, mesh type or their mixtures, furthermore 2D circular and 3D tubular geometries, porous, fractal biomimetic flow fields. The advantages / disadvantages tendencies from optimizations discussed. performance each design is compared to conventional serpentine field. Good give uniform gas distributions, low pressure drop transport sufficient rib area provide...
To have a uniform distribution of reactants is an advantage to fuel cell. We report results for such distributor with tree-like flow field plates (FFP). Numerical simulations shown that the width scaling parameters patterns in FFPs used polymer electrolyte membrane cells (PEMFC) reduces viscous dissipation channels. In this study, experimental investigations were conducted on 2-layer FF plate possessing pattern which was CNC milled high-quality graphite. Three designs different employed. I–V...
Common for tree-shaped, space-filling flow-field plates in polymer electrolyte fuel cells is their ability to distribute reactants uniformly across the membrane area, thereby avoiding excess concentration polarization or entropy production at electrodes. Such a flow field, as predicted by Murray's law circular tubes, was recently shown experimentally give better curve than serpentine parallel fields. In this theoretical work, we document that tree-shaped flow-field, composed of rectangular...
With the fast development in field of additive manufacturing, triply periodic minimal surface (TPMS) based porous media have recently found many uses mechanical property tuning. However, there is still a lack understanding their porosity-dependent permeability and electrical as well thermal conductivity. Here, we perform finite volume simulations on solid void domains Schoen gyroid (SG), Schwarz primitive (SP) beam (SPB) TPMS with porosities between 63% 88% Ansys Fluent. A simple cubic...
Abstract Photopolymer derived carbon grows in popularity, yet the range available feature sizes is limited. Herein, focus on expanding field to low surface volume ratio (SVR) structures. A high temperature acrylic photopolymerizable precursor with FTIR and DSC described a thermal inert‐gas treatment developed for producing architected mm scale SVR of 1.38×10 −3 µm −1 . Based thermogravimetric analysis mass spectrometry, two regimes activation energies ≈79 169 kJ mol are distinguished, which...
The fractal-type flow-fields for fuel cell (FC) applications are promising, due to their ability deliver uniformly, with a Peclet number Pe~1, the reactant gases catalytic layer. We review fractal designs that have been developed and studied in experimental prototypes CFD computations on 1D 3D flow models planar, circular, cylindrical conical FCs. It is shown, FC efficiency could be increased by design optimization of system. total entropy production (TEP) viscous was objective function,...
We show that the coupling effects in non-equilibrium thermodynamics for heat-, mass- and charge- transport polymer electrolyte membrane fuel cell (PEMFC) all give significant contributions to local heat effects. The set of equations was solved by modifying an open-source 1D algorithm. entropy balance used check model consistency. obeyed within 10% error PEMFC layers, except cathode backing. Dufour effect/thermal diffusion Peltier/Seebeck coefficient are commonly neglected. Here they included...
We describe a method to find profiles for the electric potential, concentration and temperature across heterogeneous cell, using fuel cell as an example. The is divided into five layers: electrolyte electrodes are treated homogeneous layers, while electrode interface regions planar Gibbs interfaces. sets of equations, one each layer, solved give three profiles. model checked thermodynamic consistency. This reveals e.g. that water not in equilibrium at interfaces high current densities. Also,...
The purpose of a good physical-chemical model is to aid cell design and operation. All such models must obey balance equations as well constitutive transport. set transport conform with the entropy balance. difficulty choose right scale description. pore may be too small, when cell’s overall performance interest. But variables given by classical thermodynamics are obviously crude, we want know location, say, hot spots. For material designer, knowledge spots central. method coarse-graining...
With the fast development in field of Additive Manufacturing, triply periodic minimal surface (TPMS) based porous media have recently found many uses mechanical property tuning. However, there is still a lack understanding their porosity-dependent permeability, and electrical thermal conductivity. Here, we perform finite volume simulations on solid void domain TPMS Schoen Gyroid (SG), Schwarz Primitive (SP) Beam (SPB) with porosities between 63% 88% ANSYS Fluent. A simple cubic lattice (CL)...
With unprecedented freedom in materials design, additive manufacturing (AM) technologies provide us with the capabilities to leverage from geometric complexity. If properly exploited, this allows design performance instead of geometry, where latter is not user defined but a result computer optimization. Entirely new mathematically defined, dimensionally stable carbon are presented that shrink isotopically under pyrolysis process generating complex CAD 3D shapes theoretically two three orders...