Simulation Of Large State Variations In Steam Power Plants
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| Author | : Richard Dolezal |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 120 |
| Release | : 2013-03-12 |
| Genre | : Science |
| ISBN | : 3642831524 |
The present simulation method has been developed at the Institute for Power Technology and Steam Generation (IVD) of the University of Stuttgart. It is being successfully employed in the analysis of processes involving large state changes such as start-ups, shut downs, malfunctions and failures in steam power generating unit, which is a large scale system consisting of several subsystems with distributed parameters, to which the steam generator also belongs. This research resulted from the increasing use of the once-through boiler, while simultaneously raising the steam parameters into the region of the supercritical state, using sliding pressure operation, combined processes with gas and steam turbines etc. The objective of this system simulation is to reduce losses of heat and condensate and to minimise unavoidable thermal stresses. The project was financed between 1979 and 1983 by the German Research Society (DFG) as part of the special research section Nr. 157 'Thermal power plants'. The Westfalen Power Company Inc. (VEW) sponsored the start-up code 'DYSTAR'. We would like to express our thanks for this support. The following members of the IVD were involved in this research project: Dr.-Ing. J. Kley Dipl.-Ing. G. Riemenschneider Dr.-Ing. A. Rolf Dipl.-Ing. U. Mayer Dipl.-lng. E. Dr.-lng. M. Klug Pfleger Dr.-Ing. G. Berndt Presently it is intended to use this non-linear, time-variant model of a power generating unit with a variable process and system struc ture as the basis for simple code versions, which one can employ e.g.
| Author | : A. J. Calvaer |
| Publisher | : Elsevier |
| Total Pages | : 549 |
| Release | : 2014-05-23 |
| Genre | : Technology & Engineering |
| ISBN | : 1483298914 |
The control of power systems and power plants is a subject of worldwide interest which continues to sustain a high level of research, development and application. Papers pertaining to areas directly related to power systems and representing the state-of-the-art methods are included in this volume. The topics covered include security analysis, dynamic state estimation, voltage control, power plant control, stability analysis, data communication, expert systems and training simulators for power plants. This interchange between those involved in the research and those involved in the practical applications of new ideas and developments provide a comprehensive reference source for all involved in the power industry.
| Author | : Aleksandar S. Jovanovic |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 499 |
| Release | : 2013-03-08 |
| Genre | : Computers |
| ISBN | : 3642839916 |
Structural safety of industrial systems and components raises a steadily growing public, scientific and engineering interest, and causes permanent development of methods and techniques used for its assessment. In addition to the well established engineering methods, applied in the field, several new methods and tools have emerged recently. Among them, the most novel ones are probably those related to expert system applica tions, appearing as an important possible improvement of the current engineering practice. The issue has been addressed by the international course EXPERT SYSTEMS IN STRUCTURAL SAFETY ASSESSMENT organized by MPA Stuttgart and JRC Ispra (Stuttgart, October 2-4, 1989), and the proceedings of the course are contained in this volume of the Lecture Notes ill Engineering. The contributions (invited lectures) tackle the issues usually confronting developers and users of expert systems applied in structural engineering, i.e. in structural safety and integrity assessment. Both the book and the course are a combination of a tutorial and of presentation of the current achievements in the field. Starting from the basic elements of expert systems (knowledge based systems), the book should "guide" the reader up to the applications in various particular sub-domains.
| Author | : Wilbert J. Lick |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 296 |
| Release | : 2012-12-06 |
| Genre | : Technology & Engineering |
| ISBN | : 3642837018 |
In computational mechanics, the first and quite often the most difficult part of a problem is the correct formulation of the problem. This is usually done in terms of differential equations. Once this formulation is accomplished, the translation of the governing differential equations into accurate, stable, and physically realistic difference equations can be a formidable task. By comparison, the numerical evaluation of these difference equations in order to obtain a solution is usually much simpler. The present notes are primarily concerned with the second task, that of deriving accurate, stable, and physically realistic difference equations from the governing differential equations. Procedures for the numerical evaluation of these difference equations are also presented. In later applications, the physical formulation of the problem and the properties of the numerical solution, especially as they are related to the numerical approximations inherent in the solution, are discussed. There are numerous ways to form difference equations from differential equations.
| Author | : Thomas J. Mueller |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 456 |
| Release | : 2013-03-08 |
| Genre | : Science |
| ISBN | : 3642840108 |
Current interest in a variety of low Reynolds number applications has focused attention on the design and evaluation of efficient airfoil sections at chord Reynolds numbers from about 100,000 to about 1,000,000. These applications include remotely piloted vehicles (RPVs) at high altitudes, sailplanes, ultra-light man-carrying/man powered aircraft, mini-RPVs at low altitudes and wind turbines/propellers. The purpose of this conference was to bring together those researchers who have been active in areas closely related to this subject. All of the papers presented are research type papers. Main topics are: Airfoil Design and Analysis, Computational Studies, Stability and Transition, Laminar Separation Bubble, Steady and Unsteady Wind Tunnel Experiments and Flight Experiments.
| Author | : Hans A. Eschenauer |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 377 |
| Release | : 2012-12-06 |
| Genre | : Technology & Engineering |
| ISBN | : 3642837077 |
In recent years, the Finite Element Methods FEM were more and more employed in development and design departments as very fast working tools in order to determine stresses, deformations, eigenfrequencies etc. for all kinds of constructions under complex loading conditions. Meanwhile. very effective software systems have been developed by various research teams although some mathematical problems (e. g. convergence) have not been solved satisfac torily yet. In order to make further advances and to find a common language between mathe maticians and mechanicians the "Society for Applied Mathematics and Mechanics" (GAMM) agreed on the foundation of a special Committee: "Discretization Methods in Solid Mechanics" focussing on the following problems: - Structuring of various methods (displacement functions, hybrid and mixed approaches, etc. >, - Survey of approach functions (Lagrange-/Hermite-polynominals, Spline-functions), - Description of singularities, - Convergence and stability, - Practical and theoretical optimality to all mentioned issues (single and interacting). One of the basic aims of the GAMM-Committee is the interdisciplinary cooperation between mechanicians, mathematicians, and users which shall be intensified. Thus, on September 22, 1985 the committee decided to hold a seminar on "Structural Optimization" in order to allow an exchange of experiences and thoughts between the experts of finite element methods and those of structural optimization. A GAMM-seminar entitled "Discretization Methods and Structural Optimization - Procedures and Applications" was hold on October 5-7, 1988 at the Unversity of Siegen.
| Author | : |
| Publisher | : |
| Total Pages | : 748 |
| Release | : 1977 |
| Genre | : Fossil fuels |
| ISBN | : |
| Author | : Heimo Walter |
| Publisher | : Springer |
| Total Pages | : 851 |
| Release | : 2017-04-18 |
| Genre | : Technology & Engineering |
| ISBN | : 3709148553 |
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.
| Author | : Ghodratollah Karami |
| Publisher | : Springer |
| Total Pages | : 264 |
| Release | : 1989 |
| Genre | : Computers |
| ISBN | : |
This book is an attempt to demonstrate the power and versatility of Boundary Element Method (BEM) in solving the complicated contact problem. The basic concepts of contact are explained followed by the derivation of analytical and numerical boundary element formulation for two-dimensional elastic contact problems. The formulation is intended for a general case of contact, so that all different geometries in contact with different frictional conditions can be analyzed. The temperature changes and body forces are also included in the formulations.
| Author | : C. Maffezzoni |
| Publisher | : Elsevier |
| Total Pages | : 176 |
| Release | : 2014-05-23 |
| Genre | : Technology & Engineering |
| ISBN | : 1483148637 |
Modelling and Control of Electric Power Plants focuses on the modeling and simulation of thermal and nuclear units; the methods and technologies of advanced control systems that are applied in power stations; the design and analysis of man-machine systems; and the processes in power generation. Contained in the book are the literature of contributors who have done research on design and operation of electric power plants. The book begins with the development of models of electric power plants and nuclear power plants. Simulations, analysis, and studies are conducted to test the processes and controls that are instituted in the operations of these plants. Another part of the discussion focuses on the control mechanisms that are employed in plants. These computer control systems are deemed essential in the operations of these plants. The role that computers play in plants is noted, which is particularly observed in the operation of equipment, control of conditions, and application of operational processes in these areas. Some of the areas in which modeling is carried out include electric power plants, fossil fuel power plants, boilers, and coal plants. The discussions can be a source of information to those interested in the design, control, and operation of power plants.
