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Heat Transfer Analysis Of A Small Thermochemical Reactor For Hydrogen Production From Ammonia
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Book Synopsis Heat Transfer Analysis of a Small Thermochemical Reactor for Hydrogen Production from Ammonia by : NaNa Owusu-Ansah
Download or read book Heat Transfer Analysis of a Small Thermochemical Reactor for Hydrogen Production from Ammonia written by NaNa Owusu-Ansah and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several types of research are ongoing throughout the world, to discover economical and reliable techniques to create hydrogen, and propagate the vision of a hydrogen economy. This research examines a COMSOL Multiphysics 5.4 heat transfer model for a hydrogen production system consisting of a retort with two different heat sources, namely a heat tape and an infrared (IR) lamp. The main objective was to compare the two heat sources and find out which one offers a better technique for producing hydrogen by raising the internal center core temperature of the retort from ambient to the highest temperature, preferably 700°C, within the shortest time possible and using less power consumption in attaining the targeted temperature. Through this study, it was established that the IR lamp could potentially help with energy savings by using just 4 kWh to reach the targeted temperature within an hour.
Book Synopsis Ammonia Based Solar Thermochemical Energy Storage System for Direct Production of High Temperature Supercritical Steam by : CHEN CHEN
Download or read book Ammonia Based Solar Thermochemical Energy Storage System for Direct Production of High Temperature Supercritical Steam written by CHEN CHEN and published by . This book was released on 2017 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the field of solar thermochemical energy storage, ammonia synthesis/dissociation is feasible for practical use in the concentrating solar power industry. In ammonia-based solar thermochemical energy storage systems, the stored energy is released when the hydrogen (H2) and nitrogen (N2) react exothermically to synthesize ammonia (NH3), providing thermal energy to a power block for electricity generation. But ammonia synthesis has not yet been shown to reach temperatures consistent with the highest performance modern power blocks (~650 C). The following dissertation addresses an ongoing investigation into the field of ammonia based thermochemical energy storage. In the first part of the dissertation, the state of the art of Concentrating Solar Power (CSP) and Thermochemical Energy Storage (TCES) are reviewed. In the second part, a two-dimensional model is proposed to simulate heating supercritical steam in an ammonia synthesis reactor. Thirdly, the model is validated as the model predicted temperature profiles match with experimental measured results well. A sensitivity analysis is carried out for the model to study the effects of six input parameters on heat transfer and reaction kinetics. The results show the process is "heat-transfer-limited" and most sensitive to activation energy. The process is also very sensitive to inlet ammonia mass fraction. Improving heat transfer and decreasing inlet ammonia mass fraction are crucial to improve the capability of the reactor to heat steam. In the fourth part, some preliminary designs for ammonia synthesis systems are proposed. Parametric studies are made with the model for each component in the proposed systems. The systems are optimized and investigated to minimize the total tube wall volume per unit power. The result shows that improving heat transfer by small dimensions and subdividing the reactor into different sections for different steam temperature ranges are good for minimizing the tube wall volume for the system. Also, it is necessary to optimize the entire system simultaneously since the wall volume for each component is comparable. At last, a future study plan for model improvement and system optimization is proposed.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis "Design and Development of a Folded-Sheet Reactor Concept for Hydrogen Production by Steam Reforming of Methanol by : Arístides Morillo
Download or read book "Design and Development of a Folded-Sheet Reactor Concept for Hydrogen Production by Steam Reforming of Methanol written by Arístides Morillo and published by Cuvillier Verlag. This book was released on 2008 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal-Hydraulic Analyses of Heat Transfer Fluid Requirements and Characteristics for Coupling A Hydrogen Production Plant to a High-Temperature Nuclear Reactor by : D. F. Wilson
Download or read book Thermal-Hydraulic Analyses of Heat Transfer Fluid Requirements and Characteristics for Coupling A Hydrogen Production Plant to a High-Temperature Nuclear Reactor written by D. F. Wilson and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Department of Energy is investigating the use of high-temperature nuclear reactors to producehydrogen using either thermochemical cycles or high-temperature electrolysis. Although the hydrogenproduction processes are in an early stage of development, coupling either of these processes to the hightemperaturereactor requires both efficient heat transfer and adequate separation of the facilities to assurethat off-normal events in the production facility do not impact the nuclear power plant. An intermediateheat transport loop will be required to separate the operations and safety functions of the nuclear andhydrogen plants. A next generation high-temperature reactor could be envisioned as a single-purposefacility that produces hydrogen or a dual-purpose facility that produces hydrogen and electricity. Earlyplants, such as the proposed Next Generation Nuclear Plant, may be dual-purpose facilities thatdemonstrate both hydrogen and efficient electrical generation. Later plants could be single-purposefacilities. At this stage of development, both single- and dual-purpose facilities need to be understood. Seven possible configurations for a system that transfers heat between the nuclear reactor and thehydrogen and/or electrical generation plants were identified. These configurations included both directand indirect cycles for the production of electricity. Both helium and liquid salts were considered as theworking fluid in the intermediate heat transport loop. Methods were developed to perform thermalhydraulicand cycle-efficiency evaluations of the different configurations and coolants. The thermalhydraulicevaluations estimated the sizes of various components in the intermediate heat transport loopfor the different configurations. The relative sizes of components provide a relative indication of thecapital cost associated with the various configurations. Estimates of the overall cycle efficiency of thevarious configurations were also determined. The evaluations determined which configurations andcoolants are the most promising from thermal-hydraulic and efficiency points of view. These evaluationsalso determined which configurations and options do not appear to be feasible at the current time.
Book Synopsis Renewable Hydrogen Production by : Ibrahim Dincer
Download or read book Renewable Hydrogen Production written by Ibrahim Dincer and published by Elsevier. This book was released on 2021-11-27 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Renewable Hydrogen Production provides a comprehensive analysis of renewable energy-based hydrogen production. Through simulation analysis and experimental investigations, the book provides fundamentals, compares existing hydrogen production applications, discusses novel technologies, and offers insights into the future directions of this rapidly evolving industry. This all-in-one resource on how to produce clean hydrogen production to enhance energy efficiency and support sustainable development will appeal to a wide variety of industries and professionals. Addresses the production of clean hydrogen from the major sources of renewable energy, including wind, solar, geothermal, hydro, biomass and marine energy Presents information from simulations and experimental analyses Offers insights into the future of renewable hydrogen production
Book Synopsis Thermal Management of the Copper-chlorine Cycle for Hydrogen Production by : Samane Ghandehariun
Download or read book Thermal Management of the Copper-chlorine Cycle for Hydrogen Production written by Samane Ghandehariun and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal Hydraulic Analyses for Coupling High Temperature Gas-Cooled Reactor to Hydrogen Plant by : S. Sherman
Download or read book Thermal Hydraulic Analyses for Coupling High Temperature Gas-Cooled Reactor to Hydrogen Plant written by S. Sherman and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The US Department of Energy is investigating the use of high-temperature nuclear reactors to produce hydrogen using either thermochemical cycles or high-temperature electrolysis. Although the hydrogen production processes are in an early stage of development, coupling either of these processes to the high-temperature reactor requires both efficient heat transfer and adequate separation of the facilities to assure that off-normal events in the production facility do not impact the nuclear power plant. An intermediate heat transport loop will be required to separate the operations and safety functions of the nuclear and hydrogen plants. A next generation high-temperature reactor could be envisioned as a single-purpose facility that produces hydrogen or a dual-purpose facility that produces hydrogen and electricity. Early plants, such as the proposed Next Generation Nuclear Plant (NGNP), may be dual-purpose facilities that demonstrate both hydrogen and efficient electrical generation. Later plants could be single-purpose facilities. At this stage of development, both single- and dual-purpose facilities need to be understood. A number of possible configurations for a system that transfers heat between the nuclear reactor and the hydrogen and/or electrical generation plants were identified. These configurations included both direct and indirect cycles for the production of electricity. Both helium and liquid salts were considered as the working fluid in the intermediate heat transport loop. Methods were developed toperform thermal-hydraulic and cycle-efficiency evaluations of the different configurations and coolants. The thermal-hydraulic evaluations estimated the sizes of various components in the intermediate heat transport loop for the different configurations. The relative sizes of components provide a relative indication of the capital cost associated with the various configurations. Estimates of the overall cycle efficiency of the various configurations were also determined. The evaluations determined which configurations and coolants are the most promising from thermalhydraulic and efficiency points of view.
Book Synopsis Thermochemical Processes for Hydrogen Production by Water Decomposition. Final Report by :
Download or read book Thermochemical Processes for Hydrogen Production by Water Decomposition. Final Report written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal contributions of the research are in the area of gas-solid reactions, ranging from models and data interpretation for fundamental kinetics and mixing of solids to simulations of engineering scale reactors. Models were derived for simulating the heat and mass transfer processes inside the reactor and tested by experiments. The effects of surface renewal of solids on the mass transfer phenomena were studied and related to the solid mixing. Catalysis by selected additives were studied experimentally. The separate results were combined in a simulation study of industrial-scale rotary reactor performance. A study was made of the controlled decompositions of a series of inorganic sulfates and their common hydrates, carried out in a Thermogravimetric Analyzer (TGA), a Differential Scanning Calorimeter (DSC), and a Differential Thermal Analyzer (DTA). Various sample sizes, heating rates, and ambient atmospheres were used to demonstrate their influence on the results. The purposes of this study were to: (i) reveal intermediate compounds, (ii) determine the stable temperature range of each compound, and (iii) measure reaction kinetics. In addition, several solid additives: carbon, metal oxides, and sodium chloride, were demonstrated to have catalytic effects to varying degrees for the different salts.
Download or read book Solar Energy written by Christoph Richter and published by Springer. This book was released on 2012-11-29 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gathering some 30 entries from the Encyclopedia of Sustainability Science and Technology, this book presents fundamental principles and technologies for sustainably harnessing solar energy. Covers photovoltaics, solar thermal energy, solar radiation and more.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy written by and published by . This book was released on 1981 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrated Energy Systems for Multigeneration by : Ibrahim Dincer
Download or read book Integrated Energy Systems for Multigeneration written by Ibrahim Dincer and published by Elsevier. This book was released on 2019-09-13 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrated Energy Systems for Multigeneration looks at how measures implemented to limit greenhouse gas emissions must consider smart utilization of available limited resources and employ renewable resources through integrated energy systems and the utilization of waste energy streams. This reference considers the main concepts of thermal and conventional energy systems through detailed systems description, analyses of methodologies, performance assessment and optimization, and illustrative examples and case studies. The book examines producing power and heat with cooling, freshwater, green fuels and other useful commodities designed to tackle rising greenhouse gas emissions in the atmosphere. With worldwide energy demand increasing, and the consequences of meeting supply with current dependency on fossil fuels, investigating and developing sustainable alternatives to the conventional energy systems is a growing concern for global stakeholders. Analyzes the links between clean energy technologies and achieving sustainable development Illustrates several examples of design and analysis of integrated energy systems Discusses performance assessment and optimization Uses illustrative examples and global case studies to explain methodologies and concepts
Book Synopsis Hydrogen Production Technologies by : Mehmet Sankir
Download or read book Hydrogen Production Technologies written by Mehmet Sankir and published by John Wiley & Sons. This book was released on 2017-03-20 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive practical review of the new technologies used to obtain hydrogen more efficiently via catalytic, electrochemical, bio- and photohydrogen production. Hydrogen has been gaining more attention in both transportation and stationary power applications. Fuel cell-powered cars are on the roads and the automotive industry is demanding feasible and efficient technologies to produce hydrogen. The principles and methods described herein lead to reasonable mitigation of the great majority of problems associated with hydrogen production technologies. The chapters in this book are written by distinguished authors who have extensive experience in their fields, and readers will have a chance to compare the fundamental production techniques and learn about the pros and cons of these technologies. The book is organized into three parts. Part I shows the catalytic and electrochemical principles involved in hydrogen production technologies. Part II addresses hydrogen production from electrochemically active bacteria (EAB) by decomposing organic compound into hydrogen in microbial electrolysis cells (MECs). The final part of the book is concerned with photohydrogen generation. Recent developments in the area of semiconductor-based nanomaterials, specifically semiconductor oxides, nitrides and metal free semiconductor-based nanomaterials for photocatalytic hydrogen production are extensively discussed.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multiphase Flow and Chemical Reactor Thermodynamics for Hydrolysis and Thermochemical Production by : Kevin Pope
Download or read book Multiphase Flow and Chemical Reactor Thermodynamics for Hydrolysis and Thermochemical Production written by Kevin Pope and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optimization of Energy Systems by : Ibrahim Din¿er
Download or read book Optimization of Energy Systems written by Ibrahim Din¿er and published by John Wiley & Sons. This book was released on 2017-05-15 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential resource for optimizing energy systems to enhance design capability, performance and sustainability Optimization of Energy Systems comprehensively describes the thermodynamic modelling, analysis and optimization of numerous types of energy systems in various applications. It provides a new understanding of the system and the process of defining proper objective functions for determination of the most suitable design parameters for achieving enhanced efficiency, cost effectiveness and sustainability. Beginning with a general summary of thermodynamics, optimization techniques and optimization methods for thermal components, the book goes on to describe how to determine the most appropriate design parameters for more complex energy systems using various optimization methods. The results of each chapter provide potential tools for design, analysis, performance improvement, and greenhouse gas emissions reduction. Key features: Comprehensive coverage of the modelling, analysis and optimization of many energy systems for a variety of applications. Examples, practical applications and case studies to put theory into practice. Study problems at the end of each chapter that foster critical thinking and skill development. Written in an easy-to-follow style, starting with simple systems and moving to advanced energy systems and their complexities. A unique resource for understanding cutting-edge research in the thermodynamic analysis and optimization of a wide range of energy systems, Optimization of Energy Systems is suitable for graduate and senior undergraduate students, researchers, engineers, practitioners, and scientists in the area of energy systems.
