Numerical Simulation Of Power Plants And Firing Systems

The book comprises the fundamentals of the numerical simulation of fluid flows as well as the modelling of a power plant and plant components. The fundamental equations for heat and mass transfer will be prepared for the application in the numerical simulation. Selected numerical methods will be discussed in detail. The book will deal with the gas as well as with the water/steam flow. Regulation and controller, simplified models and hybrid models as well as the validation of measurement data are also included in the book.

The book provides highly specialized researchers and practitioners with a major contribution to mathematical models’ developments for energy systems. First, dynamic process simulation models based on mixture flow and two-fluid models are developed for combined-cycle power plants, pulverised coal-fired power plants, concentrated solar power plant and municipal waste incineration. Operation data, obtained from different power stations, are used to investigate the capability of dynamic models to predict the behaviour of real processes and to analyse the influence of modeling assumptions on simulation results. Then, a computational fluid dynamics (CFD) simulation programme, so-called DEMEST, is developed. Here, the fluid-solid, particle-particle and particle-wall interactions are modeled by tracking all individual particles. To this purpose, the deterministic Euler-Lagrange/Discrete Element Method (DEM) is applied and further improved. An emphasis is given to the determination of inter-phase values, such as volumetric void fraction, momentum and heat transfers, using a new procedure known as the offset-method and to the particle-grid method allowing the refinement of the grid resolution independently from particle size. Model validation is described in detail. Moreover, thermochemical reaction models for solid fuel combustion are developed based on quasi-single-phase, two-fluid and Euler-Lagrange/MP-PIC models. Measurements obtained from actual power plants are used for validation and comparison of the developed numerical models.

It is widely believed that a large proportion of greenhouse gas emissions originated anthropogenically from the use of fossil fuels with additional contributions coming from manufactured materials, deforestation, soil erosion, and agriculture (including livestock). The global society actively supports measures to create a flexible and low-carbon energy economy to attenuate climate change and its devastating environmental consequences. In this Special Issue, the recent advancements in the next-generation thermochemical conversion processes for solid fuels and renewable energies (e.g., the operational flexibility of co-combustion of biomass and lignite, integrated solar combined cycle power plants, and advanced gasification systems such as the sorption-enhanced gasification and the chemical looping gasification) were shown.

An exploration of how advances in computing technology and research can be combined to extend the capabilities and economics of modern power plants. The contributors, from academia as well as practising engineers, illustrate how the various methodologies can be applied to power plant operation.

This book quantifies the potential for greater energy efficiency in industry on the basis of technology- and sector-related analyses. Starting from the methodological fundamentals, the first part discusses the electricity- and heat-based basic technologies and cross-sectional processes on the basis of numerous application examples. In addition to classic topics such as lighting and heat recovery, the study also covers processes that have received less attention to date, such as drying and painting. The second part is devoted to energy-intensive industries, in particular metal production and processing, the manufacture of the non-metallic materials cement and glass, and the chemical, paper, plastics and food industries. Both parts are concluded by placing them in a larger energy and economic context. The findings are condensed into checklists at many points and summarized in the overall view at the end to form generally applicable recommendations. This book is a translation of the original German 2nd edition Energieeffizienz in der Industrie by Markus Blesl and Alois Kessler, published by Springer-Verlag GmbH Germany, part of Springer Nature in 2017. The translation was done with the help of artificial intelligence (machine translation by the service DeepL.com). A subsequent human revision was done primarily in terms of content, so that the book will read stylistically differently from a conventional translation. Springer Nature works continuously to further the development of tools for the production of books and on the related technologies to support the authors.

Spinodal Decomposition in Binary Polymer Blends: Monte Carlo Simulations and Dynamic Mean Field Theory.- Dynamics of Convection and Dynamos in Rotating Spheres.- Recent Developments in IMD: Interactions for Covalent and Metallic Systems.- Finite Difference Modelling of Seismic Wave Phenomena within the Earth's Upper Mantle.- Collisional Dynamics of Black Holes and Star Clusters Using Massively Parallel Computing.- Three-Dimensional Direct and Inverse Electromagnetic Scattering.- Precession Driven Flow in Ellipsoidal Cavities.- The Computation of Highly Exited Hyperbolic 3D-eigenmodes and its Application to Cosmology.- Fluid Jet Simulations using Smoothed Particle Hydrodynamics.- Spectral Properties of CUO2 Planes in a Cluster Perturbation Approach.- Electronic, Structural and Vibrational Properties of Chalcogenides on Si(001) and Ge(001) Surfaces.- Dynamical Properties of the t-J Model.- Effects of Three Nucleon-Interactions in A = 4.- Phase Transitions in Insulating 1D Electron Systems.- Excited States of Semiconductors and Molecules.- Jacobi-Davidson Algorithm with Fast Matrix-Vector Multiplikation on Massively Parallel and Vector Supercomputers.- Time-dependent Reactive Scattering for Ion-neutral Collisions.- Ground and Exited States of the Hydrogen Negative Ion and Negative Donor Systems in Strong Magnetic Fields.- Quantum Chemical Calculations of Transition Metal Complexes.- Car-Parrinello Density Functional Calculations of the Bond Rupture Process of Thiolate on Gold in AFM Measurements: Progress and First Results.- DNS of Laminar-Turbulent Transition in a 3D Aerodynamics Boundary-Layer Flow.- High-Performance Computing: Numerical Simulation of the Melt Flow in an Industrial Czochralski Cruzible.- Analysis of an Elastic Wing in Subsonic Flow Using Direct Numerical Aeroelastic Simulation.- Large Eddy Simulation of the Flow over a Matrix of Surface-mounted Cubes.- Simulation of Bubbly Gas-Liquid Flows by a Parallel Finite-Difference /Front-Tracking Method.- Rotary Wing Aerodynamics and Aeroelasticity.- Unsteady Flow Simulations for Turbomachinery Applications on Dynamic Grids.- Testing Turbulence Models by Comparison with DNS Data of Adverse-pressure-gradient Boundary Layer Flow.- Large Eddy Simulation of Subcritical Flow around Sphere.- LES of Turbulent Flows Trough 90°-Pipe Bends on NEC SX-4.- Computations for the European LESFOIL Project.- Correlation Analysis of Permixed Turbulent Flames Using Direct Numerical Simulations.- Adaptive Chemistry Computation to Accelerate Parallel DNS of Turbulent Combustion.- The Generation of Dissipative Quasi-Particles near Turing's Bifurcation in Three-Dimensional Reacting Diffusion Systems.- Upwind Relaxation Algorithm for Reentry Nonequilibrium Flows.- Numerical Simulation of the Coupled Dynamic Processes of the Water-Steam Cycle and the Furnace System.- Container Size Dependence of the Velocity Fluctuations in Suspension of Monodisperse Spheres.- Implementing Luby's Algorithm on the CRAY T3E.- Spatial Partitioning for Parallel Hierarchical Radiosity on Distributed Memory Architectures.- Construction of Large Permutation Representations for Matrix Groups on Parallel Supercomputers.- Advances in High-Performance Computing: Multigrid Methods for Partial Differential Equations and its Applications.- Recent Advances of SKaMPI.- Porting SPLASH-2 Benchmarks to the T3E.

Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.

Advances in electronics have made possible the production of a vast variety of tools for the simulation of ever more complex problems related to physics and engineering. Applications to the nuclear field have been consistently enlarged over the years up to the point where simulators have now been developed both for engineering design and for nuclear power plant operator training. The number and the variety of simulators have grown to such an extent that it has become necessary to classify the numerous types now available. Simulators are of paramount importance for the design of nuclear power plants, for optimizing their efficiency and for the training of their operators: factors that contribute to their overall security. This study of power plants was commissioned by the Directorate-General Energy, of the European Communities, and its appearance marks the first comprehensive text of its kind on the entire panoply of nuclear power plant simulators. To complete the picture, the simulation of fossil fuel stations is also included. The volume gives a systematic view of a very complex field and allows the reader to find his way toward a classification.