Download or read book Multiscale Thermal Transport in Energy Systems written by Yuwen Zhang and published by Nova Publishers. This book was released on 2016 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Yuwen Zhang is a James C. Dowell Professor and the Chairman of the Department of Mechanical and Aerospace Engineering at University of Missouri. He was a recipient of the Young Investigator Award from the Office of Naval Research in 2002. He is a fellow of the American Association for the Advancement of Science (AAAS), a fellow of the American Society of Mechanical Engineers (ASME), and an associate fellow of American Institute of Aeronautics and Astronautics (AIAA). Zhang received the 2010 MU Chancellor's Award for Outstanding Research and Creative Activity. His research has resulted in more than 250 journal papers and more than 150 conference papers, and he has published five books. Zhang's research has been funded by the ONR, the Air Force Research Laboratory, the National Science Foundation, the U.S. Army Program Executive Office for Simulation, Training & Instrumentation and the MU Research Board. He is serving as co-editor in chief for two international journals, and he is an editorial board member for 10 international journals. Book Description: During energy utilization and conversion, thermal energy is either an intermediate product or a byproduct; that is, thermal transport plays a critical role on efficiency, reliability, and safety of the energy systems. Recent development in nanotechnologies enabled significant improvement of the thermal energy storage performance, fuel cell, battery and thermoelectric devices. To meet the ever increasing challenges posed by energy systems, innovative and transformative measures must be taken to significantly improve the performance of these devices. Such measures will not be possible without a thorough understanding of thermal transport at molecular, nano-and microscale levels because physical phenomena occurring at the molecular, nano- and microscale will have profound effects on the performance at the system level. Understanding of multiscale thermal transport in the energy system is essential to improve their performance. Target Audience: Engineers, scientists, graduate students, and professors working in the area of mechanical, chemical and electrical engineering.

Download or read book Multiscale Thermal Transport written by C. C. Wong and published by . This book was released on 2004 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: A concurrent computational and experimental investigation of thermal transport is performed with the goal of improving understanding of, and predictive capability for, thermal transport in microdevices. The computational component involves Monte Carlo simulation of phonon transport. In these simulations, all acoustic modes are included and their properties are drawn from a realistic dispersion relation. Phonon-phonon and phonon-boundary scattering events are treated independently. A new set of phonon-phonon scattering coefficients are proposed that reflect the elimination of assumptions present in earlier analytical work from the simulation. The experimental component involves steady-state measurement of thermal conductivity on silicon films as thin as 340nm at a range of temperatures. Agreement between the experiment and simulation on single-crystal silicon thin films is excellent, Agreement for polycrystalline films is promising, but significant work remains to be done before predictions can be made confidently. Knowledge gained from these efforts was used to construct improved semiclassical models with the goal of representing microscale effects in existing macroscale codes in a computationally efficient manner.

Download or read book Applications of Advanced Multiscale Simulations in Thermal Performance Improvement of Energy Systems written by 劉華强 and published by . This book was released on 2020 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Heat and Mass Transfer in Energy Systems written by Alessandro Mauro and published by MDPI. This book was released on 2020-01-09 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the interest of the scientific community towards efficient energy systems has significantly increased. One of the reasons is certainly related to the change in the temperature of the planet, which has increased by 0.76 °C with respect to preindustrial levels, according to the Intergovernmental Panel on Climate Change (IPCC), and is still increasing. The European Union considers it vital to prevent global warming from exceeding 2 °C with respect to pre-industrial levels, as it has been proven that this will result in irreversible and potentially catastrophic changes. These changes in climate are mainly caused by greenhouse gas emissions related to human activities, and can be drastically reduced by employing energy systems for the heating and cooling of buildings, as well as for power production, characterized by high efficiency levels and/or based on renewable energy sources. This Special Issue, published in the Energies journal, includes 13 contributions from across the world, including a wide range of applications such as hybrid residential renewable energy systems, desiccant-based air handling units, heat exchanges for engine WHR, solar chimney systems, and other interesting topics.

Download or read book Modelling Simulation and Control of Thermal Energy Systems written by Kwang Y. Lee and published by MDPI. This book was released on 2020-11-03 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Faced with an ever-growing resource scarcity and environmental regulations, the last 30 years have witnessed the rapid development of various renewable power sources, such as wind, tidal, and solar power generation. The variable and uncertain nature of these resources is well-known, while the utilization of power electronic converters presents new challenges for the stability of the power grid. Consequently, various control and operational strategies have been proposed and implemented by the industry and research community, with a growing requirement for flexibility and load regulation placed on conventional thermal power generation. Against this background, the modelling and control of conventional thermal engines, such as those based on diesel and gasoline, are experiencing serious obstacles when facing increasing environmental concerns. Efficient control that can fulfill the requirements of high efficiency, low pollution, and long durability is an emerging requirement. The modelling, simulation, and control of thermal energy systems are key to providing innovative and effective solutions. Through applying detailed dynamic modelling, a thorough understanding of the thermal conversion mechanism(s) can be achieved, based on which advanced control strategies can be designed to improve the performance of the thermal energy system, both in economic and environmental terms. Simulation studies and test beds are also of great significance for these research activities prior to proceeding to field tests. This Special Issue will contribute a practical and comprehensive forum for exchanging novel research ideas or empirical practices that bridge the modelling, simulation, and control of thermal energy systems. Papers that analyze particular aspects of thermal energy systems, involving, for example, conventional power plants, innovative thermal power generation, various thermal engines, thermal energy storage, and fundamental heat transfer management, on the basis of one or more of the following topics, are invited in this Special Issue: • Power plant modelling, simulation, and control; • Thermal engines; • Thermal energy control in building energy systems; • Combined heat and power (CHP) generation; • Thermal energy storage systems; • Improving thermal comfort technologies; • Optimization of complex thermal systems; • Modelling and control of thermal networks; • Thermal management of fuel cell systems; • Thermal control of solar utilization; • Heat pump control; • Heat exchanger control.

Download or read book Exploring Heat Transfer at the Atomistic Level for Thermal Energy Conversion and Management written by Zhiting Tian and published by . This book was released on 2014 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat transfer at the scales of atoms plays an important role in many applications such as thermoelectric energy conversion and thermal management of microelectronic devices. While nanoengineering offers unique opportunities to manipulate heat to our advantages, it also imposes challenges on the fundamental understanding of nanoscale heat transfer. As the characteristic lengths of the system size become comparable to the mean free paths of heat carriers, macroscopic theories based on heat diffusion are no longer valid due to size effects. Atomistic level simulation can provide powerful insights into the microscopic processes governing heat conduction, and is the focus of this thesis. In this thesis, we first introduce atomistic techniques to investigate phonon transport in bulk crystals. We start with normal mode analysis within the classical molecular dynamics framework to estimate the spectral phonon transport properties. Although it can provide the detailed phonon properties adequately, classical molecular dynamics with empirical potentials do not always yield accurate predictions. Then, we move to first-principles density functional theory (DFT) to compute mode-dependent phonon properties. Such simulations can well reproduce experimental values of phonon dispersion and thermal conductivity with no adjustable parameters, establishing confidence that such an approach can provide reliable information about the microscopic processes. These detailed calculations not only unveil which phonon modes are responsible for heat conduction in bulk crystals, but also expand our fundamental understanding of phonon transport, such as the importance of optical phonons. Next, we study thermal transport across single and multiple interfaces via the atomistic Green's function method, especially the impact of interface roughness on phonon transmission across a single interface and coherent phonon transport in superlattices. Both the DFT and Green's function techniques provide fundamental parameters that then can be used to understand mesoscale transport. This paves the way for multiscale modeling from first-principles. Through these multiscale modeling efforts, we are able to obtain a comprehensive understanding of heat transfer from the atomistic to the macroscale, with important implications for energy applications. Complementary to the theoretical work, we measure the interface thermal conductance using ultrafast time-domain thermoreflectance experiments, examining thermal transport across solid-liquid interfaces modified by self-assembled monolayers. We find that an extra molecular layer can enhance the thermal transport across solid-liquid interfaces. In summary, theoretical, computational and theoretical approaches have been applied to study heat transfer at the atomistic level. The findings from this thesis have improved our fundamental understanding of phonon transport properties with important implications for energy applications and beyond, and build a foundation for multiscale simulation of phonon heat conduction at the mesoscale.

Download or read book Thermal Energy Systems written by Steven G. Penoncello and published by CRC Press. This book was released on 2018-09-19 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal Energy Systems: Design and Analysis, Second Edition presents basic concepts for simulation and optimization, and introduces simulation and optimization techniques for system modeling. This text addresses engineering economy, optimization, hydraulic systems, energy systems, and system simulation. Computer modeling is presented, and a companion website provides specific coverage of EES and Excel in thermal-fluid design. Assuming prior coursework in basic thermodynamics and fluid mechanics, this fully updated and improved text will guide students in Mechanical and Chemical Engineering as they apply their knowledge to systems analysis and design, and to capstone design project work.

Download or read book Design of Thermal Energy Systems written by Pradip Majumdar and published by John Wiley & Sons. This book was released on 2021-06-01 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design of Thermal Energy Systems Pradip Majumdar, Northern Illinois University, USA A comprehensive introduction to the design and analysis of thermal energy systems Design of Thermal Energy Systems covers the fundamentals and applications in thermal energy systems and components, including conventional power generation and cooling systems, renewable energy systems, heat recovery systems, heat sinks and thermal management. Practical examples are used throughout and are drawn from solar energy systems, fuel cell and battery thermal management, electrical and electronics cooling, engine exhaust heat and emissions, and manufacturing processes. Recent research topics such as steady and unsteady state simulation and optimization methods are also included. Key features: Provides a comprehensive introduction to the design and analysis of thermal energy systems, covering fundamentals and applications. Includes a wide range of industrial application problems and worked out example problems. Applies thermal analysis techniques to generate design specification and ratings. Demonstrates how to design thermal systems and components to meet engineering specifications. Considers alternative options and allows for the estimation of cost and feasibility of thermal systems. Accompanied by a website including software for design and analysis, a solutions manual, and presentation files with PowerPoint slides. The book is essential reading for: practicing engineers in energy and power industries; consulting engineers in mechanical, electrical and chemical engineering; and senior undergraduate and graduate engineering students.

Download or read book Multiscale Simulation and Design written by and published by Academic Press. This book was released on 2011-06-27 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the increasing importance of multi-scale computation in engineering, stimulated by the dramatic development of computer technology and understanding of multi-scale structures, an issue on multi-scale simulation and design--or so-called virtual process engineering--is now edited. ACE published an issue with title of multi-scale analysis in 2005 (vol 35). The intention of the present volume is different, trying to elucidate the bottlenecks and to identify the correct directions for the coming years from the process and product engineering point of view. Both fundamental and practical contributions will be provided from academia and industry. Updates and informs the reader on the latest research findings using original reviews Written by leading industry experts and scholars Reviews and analyzes developments in the field

Download or read book Thermodynamic Optimization of Complex Energy Systems written by Adrian Bejan and published by Springer Science & Business Media. This book was released on 1999-04-30 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive assessment of the methodologies of thermodynamic optimization, exergy analysis and thermoeconomics, and their application to the design of efficient and environmentally sound energy systems. The chapters are organized in a sequence that begins with pure thermodynamics and progresses towards the blending of thermodynamics with other disciplines, such as heat transfer and cost accounting. Three methods of analysis stand out: entropy generation minimization, exergy (or availability) analysis, and thermoeconomics. The book reviews current directions in a field that is both extremely important and intellectually alive. Additionally, new directions for research on thermodynamics and optimization are revealed.

Download or read book Thermal Energy Systems written by Steven G. Penoncello and published by CRC Press. This book was released on 2015-01-20 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: Model a Thermal System without Lengthy Hand Calculations Before components are purchased and a thermal energy system is built, the effective engineer must first solve the equations representing the mathematical model of the system. Having a working mathematical model based on physics and equipment performance information is crucial to finding

Download or read book Multiscale Modelling of Electronic and Thermal Transport written by Namita Narendra and published by . This book was released on 2017 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multi Energy Systems written by Zbigniew Leonowicz and published by Mdpi AG. This book was released on 2023-11-23 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Industrial/commercial centers and residential consumers require different types of energy such as electrical, heat, and natural gas. Nowadays, many types of energy resources are available. Traditionally, energy is operated and planned separately, but their combination may be synergistic. Hence, penetration of multi-energy systems has been raised in the real world, e.g., co-generation combined heat and power systems. The process of combining various types of energy is also called a multi-carrier energy system, which increases energy efficiency. In addition, the rapid development of technologies has resulted in amplifying the joint operation of the multi-generation systems. This highlights the importance of focusing on multiple alternatives such as integration of renewable energy sources, effective energy conservation, energy storage, etc. The main purpose of the proposed topic was to cover research in electrical, mechanical engineering, and thermal sciences, with a strong concentration on multi-energy analysis, integrated energy systems, multi-energy systems modeling, operation and planning of integrated energy systems, energy conversion, efficiency, renewable energy and electricity supply, including small and large demand scales. It also welcomed research on the technologies of energy storage and electric vehicles.

Download or read book Heat and Mass Transfer Intensification and Shape Optimization written by Lingai Luo and published by Springer Science & Business Media. This book was released on 2013-02-26 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Is the heat and mass transfer intensification defined as a new paradigm of process engineering, or is it just a common and old idea, renamed and given the current taste? Where might intensification occur? How to achieve intensification? How the shape optimization of thermal and fluidic devices leads to intensified heat and mass transfers? To answer these questions, Heat & Mass Transfer Intensification and Shape Optimization: A Multi-scale Approach clarifies the definition of the intensification by highlighting the potential role of the multi-scale structures, the specific interfacial area, the distribution of driving force, the modes of energy supply and the temporal aspects of processes. A reflection on the methods of process intensification or heat and mass transfer enhancement in multi-scale structures is provided, including porous media, heat exchangers, fluid distributors, mixers and reactors. A multi-scale approach to achieve intensification and shape optimization is developed and clearly explained. Providing readers with a tool box of reflections, techniques, methods, supported by literature reviews, Heat & Mass Transfer Intensification and Shape Optimization: A Multi-scale Approach will be a key guide for students, a teaching aid for lecturers and a source of inspiration for future research subjects.

Download or read book Thermal Engineering in Power Systems written by Ryoichi Amano and published by WIT Press. This book was released on 2008 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research and development in thermal engineering for power systems are of significant importance to many scientists who are engaged in research and design work in power-related industries and laboratories. This book focuses on variety of research areas including Components of Compressor and Turbines that are used for both electric power systems and aero engines, Fuel Cells, Energy Conversion, and Energy Reuse and Recycling Systems. To be competitive in today's market, power systems need to reduce the operating costs, increase capacity factors and deal with many other tough issues. Heat Transfer and fluid flow issues are of great significance and it is likely that a state-of-the-art edited book with reference to power systems will make a contribution for design and R&D engineers and the development towards sustainable energy systems.

Download or read book Thermal Energy Systems written by Ashwani Kumar and published by CRC Press. This book was released on 2023-06-30 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The text provides in-depth knowledge about recent advances in solar collector systems, photovoltaic systems, the role of thermal energy systems in buildings, phase change materials, geothermal energy, biofuels, and thermal management systems for EVs in social and industrial applications. It further aims toward the inclusion of innovation and implementation of strategies for CO2 emission reduction through the reduction of energy consumption using conventional sources. This book: Presents the latest advances in the field of thermal energy storage, solar energy development, geothermal energy, and hybrid energy applications for green development. Highlights the importance of innovation and implementation of strategies for CO2 emission reduction through the reduction of energy consumption using sustainable technologies and methods. Discusses design development, life cycle assessment, modelling and simulation of thermal energy systems in detail. Synergize exploration related to the various properties and functionalities through extensive theoretical and numerical modelling present in the energy sector. Explores opportunities, challenges, future perspectives and approaches toward gaining sustainability through renewable energy resources. The text discusses the fundamentals of thermal energy and its applications in a comprehensive manner. It further covers advancements in solar thermal and photovoltaic systems. The text highlights the contribution of geothermal energy conversion systems to sustainable development. It showcases the design and optimization of ground source heat pumps for space conditioning and presents modelling and simulation of the thermal energy systems for design optimization. It will serve as an ideal reference text for senior undergraduate, graduate students and academic researchers in the fields of mechanical engineering, environmental engineering and energy engineering.

Download or read book Multi Scale Thermal Transport in Electronics written by Subbalakshmi Pisipati and published by . This book was released on 2013 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: