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Author: Siu-Wo Chan
Publisher: Open Dissertation Press
ISBN: 9781361471371
Category :
Languages : en
Pages :
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Book Description
This dissertation, "Design, Control and Application of Battery-ultracapacitor Hybrid Systems" by Siu-wo, Chan, 陳兆和, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract Rechargeable batteries have been widely adopted for many types of equipment, including mobile phones, notebook computers and electric vehicles (EVs). The off-line operation times of those devices depend on the energy storage capacities of batteries. Strictly speaking, the power densities as well as the energy densities of batteries determine the operation times. For most portable electronics devices, power management schemes have been implemented to save energy. Usually, auxiliary parts like screens will be deactivated first and then the microprocessors of those devices will also enter sleep-mode. Energy consumption of the systems in idle stage drops below one-tenth of the nominal ratings. However, such power management schemes could not effectively enhance the operation times of certain high power rating devices like EVs. High energy density batteries like lithium-ion battery and nickel cadmium battery have been commercialized, and the storage capacities are triple that of lead-acid cells invented long time ago. Certainly, they are beneficial to the operation times of portable equipment. However, the power densities of those batteries are inadequate under certain circumstance. Bursts of current are required for the normal operations of various kinds of loads, especially with systems consisting motors. Acceleration of an EV or starting of the motor will lead to sudden increase of current consumption. It should be noted that the usable capacities of batteries depend on the magnitudes of loading current as well as the storage capacities. Even worse, the life spans of batteries will be shortened under high rates of discharging. Hybridization of batteries and ultracapacitors mitigates the problem. The main aim of this project is to study and design new circuits for the application of battery-ultracapacitor hybrid system. Ultracapacitors have just entered the commercialization stage. These new kinds of electric power storage devices possess the great advantage of high power density. Other advantages include wide temperature range, long life, and high charging and discharging efficiency. When ultracapacitors are used in combination with other energy storages and sources like batteries and fuel cells, the hybrid systems can meet the goals of performance and cost better than a single VII energy storage device. The major applications of battery-ultracapacitor hybrid systems are for transportation and automotive domain. The repetitive acceleration and braking of vehicles, buses, mass transit trains, and metro systems are ideal for this technology. Since ultracapacitors are able to absorb and deliver a burst of current, they can capture regenerative breaking energy and re-applying the energy for acceleration later on. This not only saves energy, but also extends life spans and usable capacities of batteries. The characteristics of different kinds of batteries and ultracapacitors are brought out in the first part of the thesis. Since lithium-batteries possess higher energy capacities than other batteries, their performance was studied and a low cost hardware circuit for available capacity detection was built. The characteristic of a battery-ultracapacitor hybrid system was then appraised. A dedicated charger for ultracapacitors used for battery-ultracapacitor systems was developed, which exhibits distinct advantages over common chargers. Finally, an innovative switched-capacitor multilevel
Author: Siu-Wo Chan
Publisher: Open Dissertation Press
ISBN: 9781361471371
Category :
Languages : en
Pages :
Get Book Here
Book Description
This dissertation, "Design, Control and Application of Battery-ultracapacitor Hybrid Systems" by Siu-wo, Chan, 陳兆和, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract Rechargeable batteries have been widely adopted for many types of equipment, including mobile phones, notebook computers and electric vehicles (EVs). The off-line operation times of those devices depend on the energy storage capacities of batteries. Strictly speaking, the power densities as well as the energy densities of batteries determine the operation times. For most portable electronics devices, power management schemes have been implemented to save energy. Usually, auxiliary parts like screens will be deactivated first and then the microprocessors of those devices will also enter sleep-mode. Energy consumption of the systems in idle stage drops below one-tenth of the nominal ratings. However, such power management schemes could not effectively enhance the operation times of certain high power rating devices like EVs. High energy density batteries like lithium-ion battery and nickel cadmium battery have been commercialized, and the storage capacities are triple that of lead-acid cells invented long time ago. Certainly, they are beneficial to the operation times of portable equipment. However, the power densities of those batteries are inadequate under certain circumstance. Bursts of current are required for the normal operations of various kinds of loads, especially with systems consisting motors. Acceleration of an EV or starting of the motor will lead to sudden increase of current consumption. It should be noted that the usable capacities of batteries depend on the magnitudes of loading current as well as the storage capacities. Even worse, the life spans of batteries will be shortened under high rates of discharging. Hybridization of batteries and ultracapacitors mitigates the problem. The main aim of this project is to study and design new circuits for the application of battery-ultracapacitor hybrid system. Ultracapacitors have just entered the commercialization stage. These new kinds of electric power storage devices possess the great advantage of high power density. Other advantages include wide temperature range, long life, and high charging and discharging efficiency. When ultracapacitors are used in combination with other energy storages and sources like batteries and fuel cells, the hybrid systems can meet the goals of performance and cost better than a single VII energy storage device. The major applications of battery-ultracapacitor hybrid systems are for transportation and automotive domain. The repetitive acceleration and braking of vehicles, buses, mass transit trains, and metro systems are ideal for this technology. Since ultracapacitors are able to absorb and deliver a burst of current, they can capture regenerative breaking energy and re-applying the energy for acceleration later on. This not only saves energy, but also extends life spans and usable capacities of batteries. The characteristics of different kinds of batteries and ultracapacitors are brought out in the first part of the thesis. Since lithium-batteries possess higher energy capacities than other batteries, their performance was studied and a low cost hardware circuit for available capacity detection was built. The characteristic of a battery-ultracapacitor hybrid system was then appraised. A dedicated charger for ultracapacitors used for battery-ultracapacitor systems was developed, which exhibits distinct advantages over common chargers. Finally, an innovative switched-capacitor multilevel
Author: Siu-wo Chan
Publisher:
ISBN:
Category : Capacitors
Languages : en
Pages :
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Book Description
Author: Ahmet Aktas
Publisher: Academic Press
ISBN: 0323885004
Category : Science
Languages : en
Pages : 372
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Book Description
Solar Hybrid Systems: Design and Application discusses the key power generation characteristics of solar systems and explores the growing need for hybrid systems. The authors use real-life examples to explain the disadvantages of solar systems without hybridization and to demonstrate the various applications hybrid solar systems can be used for, paying special attention to its integration with energy storage systems. The book also discusses the impact of hybridization and how this can improve power generation quality along with investigating novel and advanced hybrid solar systems. This is a useful reference for engineers and researchers involved in both the development and application of hybrid solar systems, and features topics such as solutions for the intermittence of renewable energy sources; on-gird and off-grid solar hybrid systems; the simulation, design and application of hybrid solar systems; the role of energy storage systems in solar hybrid applications; and the future of electric vehicles using solar hybrid systems. - Demonstrates the benefits of hybrid solar systems and why they are needed - Features practical advice on designing hybrid solar systems - Includes key findings and real-world examples to illustrate the applications of hybrid solar systems
Author: Charith Tammineedi
Publisher:
ISBN:
Category :
Languages : en
Pages : 67
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Book Description
Author: Amgad Elgowainy
Publisher: Springer
ISBN: 9781071614914
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
This volume of "Encyclopedia of Sustainability Science and Technology, Second Edition," covers the electrification of vehicles, which is key to a sustainable future of transportation in both light-duty and heavy-duty vehicle sectors to address global concerns of climate change, air pollutant emissions, energy efficiency and energy security. Vehicle electrification includes several existing and emerging technologies and powertrain architectures such as conventional hybrid electric vehicles (HEVs), plug-in hybrids with various electric driving range, short- and long-range battery electric vehicles, as well as hydrogen fuel cell electric vehicles (FCEVs). Electrification will be key to connected autonomous vehicles, which are perceived to improve mobility, increase safety, reduce energy consumption and infrastructure costs, improve productivity, decrease traffic congestion and increase customer satisfaction. While electrification of vehicle technologies is relatively mature, technology improvement and economies of scale are needed to compete against incumbent technologies and to realize their benefits in the marketplace. Significant infrastructure development is needed in the case of hydrogen fuel cell vehicles and to a lesser extent for plug-in electric vehicles. Vehicle efficiency improvement is sought through a combination of several approaches, including weight reduction, engine downsizing, increased engine compression ratio with high octane fuels, and the use of compression ignition engines with low octane fuels. Liquid hydrocarbon fuels are needed in applications where high storage energy density is required such as long-haul class-8 combination heavy-duty trucks. Shared mobility is another emerging concept that enables access to transportation services on an as-needed basis. This approach can enhance accessibility to transportation, decrease number of vehicles on the road, reduce energy use and impact on the environment, reduce cost of transportation and the need for parking, and reduce transportation time between origin and destination. In all, the reader will receive a comprehensive introduction to electric vehicles and technology trends, including energy storage, in light-, medium-, and heavy-duty sectors, as well as the infrastructure development that will be required to realize these benefits for society.
Author: Yatish T. Shah
Publisher: CRC Press
ISBN: 1000328597
Category : Technology & Engineering
Languages : en
Pages : 451
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Book Description
Hybrid energy systems integrate multiple sources of power generation, storage, and transport mechanisms and can facilitate increased usage of cleaner, renewable, and more efficient energy sources. Hybrid Power: Generation, Storage, and Grids discusses hybrid energy systems from fundamentals through applications and discusses generation, storage, and grids. Highlights fundamentals and applications of hybrid energy storage Discusses use in hybrid and electric vehicles and home energy needs Discusses issues related to hybrid renewable energy systems connected to the utility grid Describes the usefulness of hybrid microgrids and various forms of off-grid energy such as mini-grids, nanogrids, and stand-alone systems Covers the use of hybrid renewable energy systems for rural electrification around the world Discusses various forms and applications of hybrid energy systems, hybrid energy storage, hybrid microgrids, and hybrid off-grid energy systems Details simulation and optimization of hybrid renewable energy systems This book is aimed at advanced students and researchers in academia, government, and industry, seeking a comprehensive overview of the basics, technologies, and applications of hybrid energy systems.
Author: Nicu Bizon
Publisher: MDPI
ISBN: 3036513078
Category : Technology & Engineering
Languages : en
Pages : 222
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Book Description
Climate change is becoming visible today, and so this book—through including innovative solutions and experimental research as well as state-of-the-art studies in challenging areas related to sustainable energy development based on hybrid energy systems that combine renewable energy systems with fuel cells—represents a useful resource for researchers in these fields. In this context, hydrogen fuel cell technology is one of the alternative solutions for the development of future clean energy systems. As this book presents the latest solutions, readers working in research areas related to the above are invited to read it.
Author: Jens Bo Holm-Nielsen
Publisher: MDPI
ISBN: 3039364316
Category : Technology & Engineering
Languages : en
Pages : 276
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Book Description
The DC/AC microgrid system is a crucial empowering technology for the integration of various types of renewable energy sources (RES) accompanied by a smart control approach to enhance the system reliability and efficiency. This book presents cutting-edge technology developments and recent investigations performed with the help of power electronics. Large-scale renewable energy integration presents challenges and issues for power grids. In particular, these issues include microgrid adaption to RES, AC machines, the new configuration of AC/DC converters, and electrification of domestic needs with optimal cost expenses from domestic standalone microgrids. Furthermore, this book elaborates cutting-edge developments in electric vehicle fast charging configuration, battery management, and control schemes with renewable energies through hardware-in-loop testing and validation for performance durability in real-time application. Overall, the book covers the diverse field of microgrids, allowing readers to adopt new technologies and prepare for future power demands with sustainable green engineering.
Author: Partha Pratim Pande
Publisher: Springer Science & Business Media
ISBN: 1461449758
Category : Technology & Engineering
Languages : en
Pages : 244
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Book Description
This book provides a comprehensive guide to the design of sustainable and green computing systems (GSC). Coverage includes important breakthroughs in various aspects of GSC, including multi-core architectures, interconnection technology, data centers, high performance computing (HPC), and sensor networks. The authors address the challenges of power efficiency and sustainability in various contexts, including system design, computer architecture, programming languages, compilers and networking.
Author: Jorge Garcia
Publisher: MDPI
ISBN: 3039286862
Category : Technology & Engineering
Languages : en
Pages : 181
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Book Description
The most important environmental challenge today's society is facing is to reduce the effects of CO2 emissions and global warming. Such an ambitious challenge can only be achieved through a holistic approach, capable of tackling the problem from a multidisciplinary point of view. One of the core technologies called to play a critical role in this approach is the use of energy storage systems. These systems enable, among other things, the balancing of the stochastic behavior of Renewable Sources and Distributed Generation in modern Energy Systems; the efficient supply of industrial and consumer loads; the development of efficient and clean transport; and the development of Nearly-Zero Energy Buildings (nZEB) and intelligent cities. Hybrid Energy Storage Systems (HESS) consist of two (or more) storage devices with complementary key characteristics, that are able to behave jointly with better performance than any of the technologies considered individually. Recent developments in storage device technologies, interface systems, control and monitoring techniques, or visualization and information technologies have driven the implementation of HESS in many industrial, commercial and domestic applications. This Special Issue focuses on the analysis, design and implementation of hybrid energy storage systems across a broad spectrum, encompassing different storage technologies (including electrochemical, capacitive, mechanical or mechanical storage devices), engineering branches (power electronics and control strategies; energy engineering; energy engineering; chemistry; modelling, simulation and emulation techniques; data analysis and algorithms; social and economic analysis; intelligent and Internet-of-Things (IoT) systems; and so on.), applications (energy systems, renewable energy generation, industrial applications, transportation, Uninterruptible Power Supplies (UPS) and critical load supply, etc.) and evaluation and performance (size and weight benefits, efficiency and power loss, economic analysis, environmental costs, etc.).
