Download or read book Pore scale Modeling of Transport Phenomena in Vanadium Redox Flow Batteries written by Gang Qiu and published by . This book was released on 2012 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adviser: Ying Sun.

Download or read book Fundamental Studies on Transport Phenomena in Redox Flow Batteries with Flow Field Structures and Slurry Or Semi Solid Electrodes written by Xinyou Ke and published by . This book was released on 2019 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Redox flow batteries with flow field designs have been demonstrated to boost their capacities to deliver high current density in medium and large-scale energy storage applications. Nevertheless, the fundamental mechanisms involved with improved current density in flow batteries with serpentine flow field designs have been not fully understood. In this dissertation work, one-dimensional (1D) analytical model, two-dimensional (2D) numerical model with scaling analysis, and three-dimensional (3D) model of a serpentine flow field over the porous carbon paper electrodes have been developed to examine the distributions and amounts of pressure driven electrolyte flow penetrations into the porous carbon paper electrodes. It was found that the electrolyte flow penetrations are strongly under-estimated by 1D analytical model and 2D numerical model. The scaling analysis also demonstrates that the flow penetrations enhanced by the adjacent flow channels are significant, and were not able to be incorporated in the 1D and 2D models. The 3D model accounts the effects of landings/ribs bridged between the adjacent flow channels on flow penetrations and better calculates the amount of flow penetrations into the porous carbon paper electrodes. It was also found that the flow penetrations are sensitive to the properties of the porous electrode, i.e. permeability and porosity, a smaller permeability or porosity results in a much smaller flow penetration. The model is used to estimate the maximum current densities associated with the stoichiometric availability of electrolyte reactant flow penetrations through the porous carbon paper electrodes. The modeling results match reasonably well observed experimental data without using any adjustable parameters. This fundamental work on electrolyte flow distributions of limiting reactant availability will contribute to a better understanding of limits on electrochemical performance in flow batteries with serpentine flow field designs and should be helpful to optimize flow batteries. Slurry or semi-solid electrodes are being developed for electrochemical flow capacitors and flow batteries to decouple power and energy. The utilization of slurry electrodes is a critical issue. The electronic conductivity of slurry electrodes is considered the most significant factor to determine the utilization of slurry electrodes and consequently affect the electrochemical performance. However, understanding fundamentals related to the electronic conductivity of slurry electrodes is quite limited and especially from the aspect of theory. The existing theories, i.e. effective medium theory and percolation theory, are inadequate for predicting electronic conductivity. These two theories do not consider the particle aggregations from the aspect of particle-to-particle interactions. Thus, an understanding of particle aggregations based on particle dynamics for understanding electronic conductivity is desired. By making force scaling analysis, it was found that the Brownian, Van der Waals attractive, electrostatic repulsive and electric forces are dominant in the particle dynamics of nano-scale particles. While, for the micro-scale particles, viscous, inertia, gravitational, buoyant and electric forces are dominant. It was also preliminarily found that the particle aggregations may be related to the conduction paths and consequently affect the electronic conductivity. Also, a novel design was developed to examine the electronic conductivity. Future work should focus on correlating the particle interactions for inducing conduction paths with the electronic conductivities of slurry or semi-solid electrodes.

Download or read book Performance Modeling and Flow Rate Optimization of Vanadium Redox Flow Batteries written by Mayank Kale and published by GRIN Verlag. This book was released on 2020-08-19 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2020 in the subject Engineering - Power Engineering, grade: 9.0, Indian Institute of Technology, Bombay, language: English, abstract: There is a drastic capacity increase in the ocean, solar, and wind power based energy generation in recent years. Moreover, a larger increase is predicted in future years. Hence, we need a reliable, efficient, and cost-effective energy storage system to match up with the intermittent nature of renewable energy sources. Vanadium redox flow batteries are a promising option and are fast approaching commercialization owing to their unique characteristics like including independent scaling of power and energy density. However, there are various losses associated with the membrane, electrodes, and also due to mass transfer which limit its performance and further decrease battery capacity and efficiency. The first part of this study focusses on membrane thickness, mass transfer coefficients, electrode morphology, and current density to analyze the performance of the battery. The latter part describes the effect of flow rate on concentration overpotential, pressure losses, and pumping power to come up with an optimal variable flow rate strategy to maximize the battery capacity and system efficiency.

Download or read book New Paradigms in Flow Battery Modelling written by Akeel A. Shah and published by Springer Nature. This book was released on 2023-08-28 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive review of the latest modelling developments in flow batteries, as well as some new results and insights. Flow batteries have long been considered the most flexible answer to grid scale energy storage, and modelling is a key component in their development. Recent modelling has moved beyond macroscopic methods, towards mesoscopic and smaller scales to select materials and design components. This is important for both fundamental understanding and the design of new electrode, catalyst and electrolyte materials. There has also been a recent explosion in interest in machine learning for electrochemical energy technologies. The scope of the book includes these latest developments and is focused on advanced techniques, rather than traditional modelling paradigms. The aim of this book is to introduce these concepts and methods to flow battery researcher, but the book would have a much broader appeal since these methods also employed in other battery and fuel cell systems and far beyond. The methods will be described in detail (necessary fundamental material in Appendices). The book appeals to graduate students and researchers in academia/industry working in electrochemical systems, or those working in computational chemistry/machine learning wishing to seek new application areas.

Download or read book Advances in Batteries for Medium and Large Scale Energy Storage written by C Menictas and published by Elsevier. This book was released on 2014-12-09 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: As energy produced from renewable sources is increasingly integrated into the electricity grid, interest in energy storage technologies for grid stabilisation is growing. This book reviews advances in battery technologies and applications for medium and large-scale energy storage. Chapters address advances in nickel, sodium and lithium-based batteries. Other chapters review other emerging battery technologies such as metal-air batteries and flow batteries. The final section of the book discuses design considerations and applications of batteries in remote locations and for grid-scale storage. Reviews advances in battery technologies and applications for medium and large-scale energy storage Examines battery types, including zing-based, lithium-air and vanadium redox flow batteries Analyses design issues and applications of these technologies

Download or read book Pore scale Modelling of Transport Phenomena in Homogeneous Porous Media written by Gerhardus Petrus Jacobus Diedericks and published by . This book was released on 1999 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flow Batteries written by Christina Roth and published by John Wiley & Sons. This book was released on 2022-12-06 with total page 1510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow Batteries The premier reference on flow battery technology for large-scale, high-performance, and sustainable energy storage From basics to commercial applications, Flow Batteries covers the main aspects and recent developments of (Redox) Flow Batteries, from the electrochemical fundamentals and the materials used to their characterization and technical application. Edited by a team of leading experts, including the “founding mother of vanadium flow battery technology” Maria Skyllas-Kazacos, the full scope of this revolutionary technology is detailed, including chemistries other than vanadium and organic flow batteries. Other key topics covered in Flow Batteries include: Flow battery computational modeling and simulation, including quantum mechanical considerations, cell, stack, and system modeling, techno-economics, and grid behavior A comparison of the standard vanadium flow battery variant with new and emerging flow batteries using different chemistries and how they will change the field Commercially available flow batteries from different manufacturers, their technology, and application ranges The pivotal role of flow batteries in overcoming the global energy crisis Flow Batteries is an invaluable resource for researchers and engineers in academia and industry who want to understand and work with this exciting new technology and explore the full range of its current and future applications.

Download or read book Simulation and Modeling of Electrochemical Systems with Pore scale Analysis written by Yenny D. Anderson and published by . This book was released on 2019 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most important requirements for being able to integrate clean energy generation is storage through new battery technology. For example, to address the issue from intermittent energy sources such as wind and solar power vanadium redox flow batteries (VRFBs) have emerged as promising technology. Another promising technology, particularly for vehicular application, is that of lithium air batteries which boast high energy density (an order of magnitude higher than state of the art Li-ion batteries) but suffer from short cycle life. While the majority of literature covers these energy storage systems in experimental setups experimental identification for the optimal electrode microstructure is challenging, time consuming, and expensive. The primary objective of this dissertation is to apply pore-scale modeling to simulate the effect of key design parameters and operating conditions to optimize cell performance in vanadium redox flow and lithium-air batteries. The motivation behind selecting these battery systems is not only the technological advantages highlighted above but also because they span very different electrode architecture length scales (nanometers for Li-air to millimeters for flow batteries), which will enable the models developed to be utilized in many different systems beyond the specific ones studied here.

Download or read book Introduction to Modeling of Transport Phenomena in Porous Media written by Jacob Bear and published by Springer Science & Business Media. This book was released on 1990-03-31 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main purpose of this book is to provide the theoretical background to engineers and scientists engaged in modeling transport phenomena in porous media, in connection with various engineering projects, and to serve as a text for senior and graduate courses on transport phenomena in porous media. Such courses are taught in various disciplines, e. g. , civil engineering, chemical engineering, reservoir engineering, agricultural engineering and soil science. In these disciplines, problems are encountered in which various extensive quantities, e. g. , mass and heat, are transported through a porous material domain. Often the porous material contains several fluid phases, and the various extensive quantities are transported simultaneously throughout the multiphase system. In all these disciplines, management decisions related to a system's development and its operation have to be made. To do so, the 'manager', or the planner, needs a tool that will enable him to forecast the response of the system to the implementation of proposed management schemes. This forecast takes the form of spatial and temporal distributions of variables that describe the future state of the considered system. Pressure, stress, strain, density, velocity, solute concentration, temperature, etc. , for each phase in the system, and sometime for a component of a phase, may serve as examples of state variables. The tool that enables the required predictions is the model. A model may be defined as a simplified version of the real (porous medium) system that approximately simulates the excitation-response relations of the latter.

Download or read book Multiscale Simulation of Transport Phenomena in Semi solid Flow Batteries written by Stephen Anthony Burrows and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Validation of a two dimensional model for vanadium redox flow batteries written by Maik Becker and published by Cuvillier Verlag. This book was released on 2020-05-11 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Redox-Flow batteries can play a crucial role in the future electricity supply in order to balance the time lag between the generation of electrical energy from photovoltaics or wind power and the demand for electrical energy. However, to deploy the technology on a large scale, significant cost reductions are required. A thorough knowledge of the reactions and processes taking place within a redox-flow battery is very helpful for this task and this knowledge can be significantly improved by using a suitable mathematical model to describe the processes in a single cell of a redox-flow battery. Nevertheless, this requires a valid model that has been compared with experimental data and that can reproduce these data plausibly and validly. In this thesis, the validation of a two-dimensional model for the description of potential and current density distributions in the porous electrodes of a vanadium redox-flow battery is presented, taking into account effects of kinetics and mass transport. Newly developed potential probes are used for in-situ measurement of solid and liquid phase potentials within a single cell of a vanadium redox-flow battery. The description of the measured cell voltage and potential probe signals by the model reveals a good congruence between the model and the experimental data, so the model can be regarded as valid. Additional suggestions for improvements of the model and the implementation of further models describing membrane crossover effects or electrolyte properties are given.

Download or read book Redox Flow Batteries written by Huamin Zhang and published by CRC Press. This book was released on 2017-11-22 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow batteries have received attention in large-scale energy storage due to their flexible design, high safety, high energy efficiency, and environmental friendliness. In recent years, they have been rapidly developed and tested in a variety of scales that prove their feasibility and advantages of use. As energy becomes a global focus, it is important to consider flow battery systems. This book offers a detailed introduction to the function of different kinds of redox flow batteries, including vanadium flow batteries, as well as the electrochemical processes for their development, materials and components, applications, and near future prospects. Redox Flow Batteries: Fundamentals and Applications will give readers a full understanding of flow batteries from fundamentals to commercial applications.

Download or read book Model based Design and Optimization of Vanadium Redox Flow Batteries written by Sebastian König and published by Cuvillier Verlag. This book was released on 2017-09-13 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, a holistic approach is used to develop a multi-physical model of the Vanadium Redox Flow Battery on a system level. The model is validated with experimental data from three flow battery manufacturers and is then deployed in an extensive parameter study for designing a flow battery cell. Using finite element analysis (FEA), twenty-four different cell designs are derived, which vary in electrode area and the design of the electrolyte inlet and outlet supply channels. The performance of the designs is then simulated in a single-stack and a three-stack string system. The presented model is also deployed in a flow rate optimization study. Here, a novel strategy involving the model-based optimization of operation-points defined by state-of-charge and charging or discharging current is presented and compared to conventional flow rate control strategies. Finally, a stack voltage controller is introduced, which prevents the violation of cell voltage limits as long as the pump capacity is not fully utilized.

Download or read book Pore Scale Phenomena written by J. M. Poate and published by World Scientific Series in Nanoscience and Nanotechnology. This book was released on 2015 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of pore scale phenomena is now emerging as one of the frontiers of science and many engineering disciplines. Transport phenomena in the subsurface of the earth play key roles in the energy and environmental domains. For example, the shale gas and oil boom is revolutionizing the world's energy portfolio. Pore scale phenomena from the nanoscale to mesoscale dominate the extraction of these resources. Similarly in the environmental domain, pore storage and pore-scale physics affect the availability of water resources and protecting its quality. Water flow and vapor transport in the pores near the land surface is critical to understanding soil water evaporation in the context of local and global hydrologic cycles affecting climate and climate change. Pore scale phenomena similarly play critical roles in the domain of materials science and biology. For example, many energy devices and membrane technologies are controlled by the physical and chemical properties of the pores. Identifying and analyzing the properties of these pores has emerged as a frontier of characterization science. This book provides, for the first time, a comprehensive overview of the fascinating interrelationship between engineering and science. The authors and contributors are recognized experts from the faculty of the Colorado School of Mines, Northwestern and Stanford. This book will appeal to earth and environmental scientists, materials scientists, physicists and chemists.

Download or read book Transport Phenomena in Miniaturized Redox Flow Batteries with Novel Flow Mixing and Guidance Concepts for Integrated Electronic Chip Cooling and Powering written by Julian A. Marschewski and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flow Batteries 3 Volume Set written by Christina Roth and published by Wiley-VCH. This book was released on 2023-02-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow Batteries The premier reference on flow battery technology for large-scale, high-performance, and sustainable energy storage From basics to commercial applications, Flow Batteries covers the main aspects and recent developments of (Redox) Flow Batteries, from the electrochemical fundamentals and the materials used to their characterization and technical application. Edited by a team of leading experts, including the “founding mother of vanadium flow battery technology” Maria Skyllas-Kazacos, the full scope of this revolutionary technology is detailed, including chemistries other than vanadium and organic flow batteries. Other key topics covered in Flow Batteries include: Flow battery computational modeling and simulation, including quantum mechanical considerations, cell, stack, and system modeling, techno-economics, and grid behavior A comparison of the standard vanadium flow battery variant with new and emerging flow batteries using different chemistries and how they will change the field Commercially available flow batteries from different manufacturers, their technology, and application ranges The pivotal role of flow batteries in overcoming the global energy crisis Flow Batteries is an invaluable resource for researchers and engineers in academia and industry who want to understand and work with this exciting new technology and explore the full range of its current and future applications.

Download or read book Ion Exchange Membrane Separation Processes written by H Strathmann and published by Elsevier. This book was released on 2004-01-29 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, membranes and membrane processes are used as efficient tools for the separation of liquid mixtures or gases in the chemical and biomedical industry, in water desalination and wastewater purification. Despite the fact that various membrane processes, like reverse osmosis, are described in great detail in a number of books, processes involving ion-exchange membranes are only described in a fragmented way in scientific journals and patents; even though large industrial applications, like electrodialysis, have been around for over half a century. Therefore, this book is emphasizing on the most relevant aspects of ion-exchange membranes. This book provides a comprehensive overview of ion-exchange membrane separation processes covering the fundamentals as well as recent developments of the different products and processes and their applications. The audience for this book is heterogeneous, as it includes plant managers and process engineers as well as research scientists and graduate students. The separate chapters are based on different topics. The first chapter describes the relevant Electromembrane processes in a general overview. The second chapter explains thermodynamic and physicochemical fundamentals. The third chapter gives information about ion-exchange membrane preparation techniques, while the fourth and fifth chapter discusses the processes as unit operations giving examples for the design of specific plants. First work on the principles and applications of electrodialysis and related separation processes Presently no other comprehensive work that can serve as both reference work and text book is available Book is suited for teaching students and as source for detailed information