Download or read book Improved Coal Combustion Model in Two Dimensional Chamber written by G. S. Aslanjan and published by . This book was released on 1998 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fossil Energy Update written by and published by . This book was released on 1977 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Two dimensional Model for Coal Gasification and Combustion written by Thomas Harvey Fletcher and published by . This book was released on 1983 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 20th International Conference on Fluidized Bed Combustion written by Guangxi Yue and published by Springer Science & Business Media. This book was released on 2010-07-28 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of the 20th International Conference on Fluidized Bed Combustion (FBC) collect 9 plenary lectures and 175 peer-reviewed technical papers presented in the conference held in Xi'an China in May 18-21,2009. The conference was the 20th conference in a series, covering the latest fundamental research results, as well as the application experience from pilot plants, demonstrations and industrial units regarding to the FBC science and technology. It was co-hosted by Tsinghua University, Southeast University, Zhejiang University, China Electricity Council and Chinese Machinery Industry Federation. A particular feature of the proceedings is the balance between the papers submitted by experts from industry and the papers submitted by academic researchers, aiming to bring academic knowledge to application as well as to define new areas for research. The authors of the proceedings are the most active researchers, technology developers, experienced and representative facility operators and manufacturers. They presented the latest research results, state-of-the-art development and projects, and the useful experience. The proceedings are divided into following sections: • CFB Boiler Technology, Operation and Design • Fundamental Research on Fluidization and Fluidized Combustion • C02 Capture and Chemical Looping • Gasification • Modeling and Simulation on FBC Technology • Environments and Pollutant Control • Sustainable Fuels The proceedings can be served as idea references for researchers, engineers, academia and graduate students, plant operators, boiler manufacturers, component suppliers, and technical managers who work on FBC fundamental research, technology development and industrial application.
Download or read book Coal Combustion and Gasification written by L.Douglas Smoot and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of coal is required to help satisfy the world's energy needs. Yet coal is a difficult fossil fuel to consume efficiently and cleanly. We believe that its clean and efficient use can be increased through improved technology based on a thorough understanding of fundamental physical and chemical processes that occur during consumption. The principal objective of this book is to provide a current summary of this technology. The past technology for describing and analyzing coal furnaces and combus tors has relied largely on empirical inputs for the complex flow and chemical reactions that occur while more formally treating the heat-transfer effects. GrOWing concern over control of combustion-generated air pollutants revealed a lack of understanding of the relevant fundamental physical and chemical mechanisms. Recent technical advances in computer speed and storage capacity, and in numerical prediction of recirculating turbulent flows, two-phase flows, and flows with chemical reaction have opened new opportunities for describing and modeling such complex combustion systems in greater detail. We believe that most of the requisite component models to permit a more fundamental description of coal combustion processes are available. At the same time there is worldwide interest in the use of coal, and progress in modeling of coal reaction processes has been steady.
Download or read book Particle Studies in the Lab and Pilot scale Coal Combustion Systems written by Dishant Khatri and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past century, coal contributed more to the global electricity supply than any other source. Currently, it alone accounts for over 35% of the global electricity supply. Though coal is globally well-distributed and can provide cheap, stable, and reliable energy on demand, it emits a large amount of carbon dioxide--a greenhouse gas responsible for global warming. Additionally, it is a major source of particulate matter (PM) pollution. Thus, in recent years, to reduce the impact of coal on climate, several policies have been introduced to phase out coal. However, replacing coal with intermittent renewables has led to a reduction in the reliability of the electricity grid. To protect the electricity grid, dispatchable, low-carbon sources are required, which will largely come from sustainable, stable, and reliable fossil-fuel sources. Based on the projections from the International Energy Agency (IEA), coal will continue to be a major source of energy in the long term due to its abundance and competitively low prices. The need of the hour is to focus on addressing the key challenges of coal combustion by developing technologies for sustainable coal utilization. This approach will help in harnessing abundant and cheap coal resources without compromising the environment.This dissertation investigates two key pathways for sustainable coal combustion: Improvement in the understanding of fundamental coal combustion processes, and the development of new coal combustion technologies.In the first pathway, the fundamentals of coal combustion processes were investigated at a lab-scale level. The early-stage coal combustion processes such as submicron PM formation, and particle ignition were studied in controlled combustion environments, similar to those experienced by coal particles in near-burner regions of industrial coal combustors. In industrial coal combustors, the coal particles experience either oxidizing environments or reducing-to-oxidizing environments at different oxygen concentrations. Studies that mimic the industrial coal combustors in controlled lab-scale environments are rare. Thus, in order to fill the research gap, a two-stage Hencken burner was used in this study to simulate the practical coal combustion environments. Additionally, the instrumentation for a better understanding of submicron PM formation and particle temperatures were developed and calibrated. These studies provide valuable insights into optimizing advanced burner designs, in-flame control of PM formation, improving combustion efficiency, and heat transfer to boiler tubes.It was observed that ash evolution, soot formation, and soot oxidation are the governing processes for submicron PM evolution during the early stages of pulverized coal combustion. The submicron total PM and submicron soot PM are the first-order functions of ambient oxygen concentration and gas temperature, whereas submicron ash PM is the first-order function of coal particle temperature. In high-temperature environments, when particles undergo reducing-to-oxidizing transition, the critical factor for ignition is the presence of oxygen, not the amount of oxygen.In the second pathway, this dissertation presents the development of a dry-feed pressurized oxy-combustion pilot-scale combustor as well as a high pressure-high temperature particle sampler to demonstrate combustion characteristics of a promising future coal combustion technology - Staged Pressurized Oxy-Combustion (SPOC). The SPOC process, developed by Washington University in St. Louis, is an oxy-coal combustion technology that employs coal combustion at elevated pressure. The technology allows for carbon dioxide (CO2) capture rates of 90% or higher with significant improvements in efficiency and costs for sustainable coal utilization. The developed pressurized oxy-combustion pilot-scale combustor was used to examine pulverized coal flame stability and shape, coal particle flame temperature, char burnout, and submicron PM formation at SPOC design conditions. The understanding of these coal combustion characteristics is important for the commercialization of SPOC technology.The experiments establish that the pressurized oxy-combustion pilot-scale combustor has exceptionally good coal flame stability at SPOC design conditions. The coal particle flame temperatures are highest near the burner and decrease downstream of the combustor. Complete char combustion can be achieved with only 0.8 vol % oxygen mole fraction in the flue gas, compared with a minimal value of 2.5 vol % in conventional atmospheric pressure pulverized coal combustors. The number particle size distribution (PSD) of submicron PM exhibits two distinct modes, ultrafine and intermediate mode; however, with increasing residence time, the ultrafine mode peak decreases, and the intermediate mode peak values decline steadily and become stable.The experimental observations in this dissertation aim to complement the development of existing and future sustainable coal combustion technologies.
Download or read book Annual Report of the Commissioner of Patents written by United States. Patent Office and published by . This book was released on 1866 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1977 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Civil engineer and architect s journal written by and published by . This book was released on 1856 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of Gas Lighting Water Supply Sanitary Improvement written by and published by . This book was released on 1912 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Commissioners of Patents Journal written by Great Britain. Commissioners of Patents and published by . This book was released on 1861 with total page 1702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book List of Bureau of Mines Publications and Articles with Subject and Author Index written by United States. Bureau of Mines and published by . This book was released on 1965 with total page 1026 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific American written by and published by . This book was released on 1861 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1983 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:
