On The Importance Of Valve Modelling Reflected Pressures And Wall Friction In Cathena Water Hammer Simulations
DOWNLOAD
Download On The Importance Of Valve Modelling Reflected Pressures And Wall Friction In Cathena Water Hammer Simulations PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get On The Importance Of Valve Modelling Reflected Pressures And Wall Friction In Cathena Water Hammer Simulations book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
On The Importance Of Valve Modelling Reflected Pressures And Wall Friction In Cathena Water Hammer Simulations
DOWNLOAD
Author : T. G. Beuthe
language : en
Publisher:
Release Date : 1998
On The Importance Of Valve Modelling Reflected Pressures And Wall Friction In Cathena Water Hammer Simulations written by T. G. Beuthe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
1d And 3d Water Hammer Models
DOWNLOAD
Author : Sharon Mandair
language : en
Publisher:
Release Date : 2020
1d And 3d Water Hammer Models written by Sharon Mandair and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Hydraulic systems are a critical part of modern infrastructure. In systems such as water distribution and electricity generation, perturbations in operations and therefore transient flow conditions are unavoidable. In light of the potential damage they can inflict, the study of hydraulic transients remains an important field of interest; one in which numerical methods play a key role. Numerical techniques are therefore at the heart of this investigation, applying the one-dimensional Method of Characteristics (MOC), and the three-dimensional computational fluid dynamics (CFD) using finite volumes. These two models are complementary. MOC is simple and cost effective but only applicable to pipe systems and networks; whereas CFD has a more native representation of the physics, and can model multi-dimensional features, but at a steep computational cost. The MOC and CFD models are applied to two case studies of water-hammer hydraulics. The first is high shear pipe flow, looking closely at the fundamental physics of water-hammer, acoustic wave propagation and reflection, and dissipation. The physics are explored in energetic terms, applying the integral total energy analysis. In a context where MOC solvers are ideal, CFD is used to evaluate potential gaps in these simple models. The second case study is a load rejection at a large hydropower station. In the context of a changing electricity supply, which includes more variable renewable sources, the inherent dispatchability of hydropower begins to play a new role. Consequently, the underlying mechanical infrastructure is being exposed to damaging transient hydraulics. In this case study, MOC and CFD solvers are coupled to study the influence of a long penstock during a load rejection. MOC is used to represent the penstock, while CFD represents the turbomachine from the spiral casing to the draft tube. The study identifies the risk for severe wear and tear on the machine blades; however, importantly the role of the penstock seems to be limited to the determination of the background flow and pressure seen by the machine. The analysis shows that vortex circulation within the runner is the source of high amplitude pressure loading, while compressibility have a limited effect. Les systèmes hydrauliques sont des composantes critiques des infrastructures modernes. Les systèmes de distribution d'eau et de production hydro-électrique subissent inévitablement des changements de leur mode d'opérations, et doivent par conséquent composer avec des écoulements transitoires. Puisqu'ils peuvent endommager les machines et les structures, les transitoires hydrauliques constituent un domaine d'études important, où les méthodes numériques jouent un rôle clé. Les techniques numériques sont donc au coeur de cette étude qui utilise la méthode des caractéristique (MOC) uni-dimensionnelle, ainsi que la dynamique des fluides numérique (CFD) en trois dimensions avec des volumes finis. Les deux modèles sont complémentaires. Le modèle MOC est simple et efficace, mais c'est une approximation qui ne s'applique qu'aux systèmes et aux réseaux de conduite. La CFD utilise une représentation plus proches des lois de la physique, et permet de modéliser les phénomènes multidimensionnels, mais au prix d'un temps de calcul important. Ces modèles, MOC et CFD, sont appliqués à deux cas de coup de bélier. Le premier est l'écoulement dans une conduite avec un fort cisaillement. L'étude se concentre sur la physique du coup de bélier, la propagation et la réflexion d'un front d'onde acoustique, et sa dissipation. Ces phénomènes physiques sont explorés en termes énergétiques, en appliquant le concept d'énergie totale intégrée. Dans un contexte où les modèles MOC sont idéaux, la CFD est utilisée ici pour évaluer les limitations de ces modèles simples. Le deuxième cas est l'étude d'un rejet de charge dans une grande centrale d'hydro-électricité. Dans un contexte où la production électrique change pour inclure les énergies renouvelables et variables, la flexibilité intrinsèque de l'hydro-électricité commence à jouer un rôle nouveau. Par conséquent, les transitoires hydrauliques sont une source de dommages potentiels aux infrastructures mécaniques. Dans cette étude, les modèles MOC et CFD sont couplés afin d'évaluer l'importance de la conduite forcée lors d'un délestage. Un modèle MOC est utilisé pour simuler la conduite, et un modèle CFD pour simuler la turbine, de la bâche spirale à l'aspirateur. L'étude identifie des risques d'endommagement sur les aubes. Le rôle de la conduite semble limité à la détermination du débit et du niveau de pression moyens vus par la machine. L'analyse démontre que les vortex qui circulent entre les aubes de la roue créent de grandes fluctuations de pression; toutefois le rôle de la compressibilité est limité.
Modeling And Simulation Of A Two Stage Pressure Reducing Valve
DOWNLOAD
Author : M. K. Abdelhamid
language : en
Publisher:
Release Date : 1982
Modeling And Simulation Of A Two Stage Pressure Reducing Valve written by M. K. Abdelhamid and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Valves categories.
Natural Circulation Phenomena And Modelling For Advanced Water Cooled Reactors
DOWNLOAD
Author : International Atomic Energy Agency
language : en
Publisher:
Release Date : 2012
Natural Circulation Phenomena And Modelling For Advanced Water Cooled Reactors written by International Atomic Energy Agency and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Science categories.
Based on an IAEA coordinated research project focused on the use of passive safety systems and natural circulation to help meet the safety and economic goals of advanced nuclear power plants, this publication includes the identification and definition of the thermo-hydraulic phenomena that affect the reliability of passive safety systems, characterization of each phenomenon, integral tests to examine the passive systems and natural circulation, and a methodology for examining passive system reliability.
Physical Modelling In Geotechnics Volume 1
DOWNLOAD
Author : Andrew McNamara
language : en
Publisher: CRC Press
Release Date : 2018-07-11
Physical Modelling In Geotechnics Volume 1 written by Andrew McNamara and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-11 with Technology & Engineering categories.
Physical Modelling in Geotechnics collects more than 1500 pages of peer-reviewed papers written by researchers from over 30 countries, and presented at the 9th International Conference on Physical Modelling in Geotechnics 2018 (City, University of London, UK 17-20 July 2018). The ICPMG series has grown such that two volumes of proceedings were required to publish all contributions. The books represent a substantial body of work in four years. Physical Modelling in Geotechnics contains 230 papers, including eight keynote and themed lectures representing the state-of-the-art in physical modelling research in aspects as diverse as fundamental modelling including sensors, imaging, modelling techniques and scaling, onshore and offshore foundations, dams and embankments, retaining walls and deep excavations, ground improvement and environmental engineering, tunnels and geohazards including significant contributions in the area of seismic engineering. ISSMGE TC104 have identified areas for special attention including education in physical modelling and the promotion of physical modelling to industry. With this in mind there is a special themed paper on education, focusing on both undergraduate and postgraduate teaching as well as practicing geotechnical engineers. Physical modelling has entered a new era with the advent of exciting work on real time interfaces between physical and numerical modelling and the growth of facilities and expertise that enable development of so called ‘megafuges’ of 1000gtonne capacity or more; capable of modelling the largest and most complex of geotechnical challenges. Physical Modelling in Geotechnics will be of interest to professionals, engineers and academics interested or involved in geotechnics, geotechnical engineering and related areas. The 9th International Conference on Physical Modelling in Geotechnics was organised by the Multi Scale Geotechnical Engineering Research Centre at City, University of London under the auspices of Technical Committee 104 of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE). City, University of London, are pleased to host the prestigious international conference for the first time having initiated and hosted the first regional conference, Eurofuge, ten years ago in 2008. Quadrennial regional conferences in both Europe and Asia are now well established events giving doctoral researchers, in particular, the opportunity to attend an international conference in this rapidly evolving specialist area. This is volume 1 of a 2-volume set.
Advances In Building Services Engineering
DOWNLOAD
Author : Ioan Sarbu
language : en
Publisher: Springer Nature
Release Date : 2021-01-04
Advances In Building Services Engineering written by Ioan Sarbu and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-01-04 with Architecture categories.
This book provides a comprehensive, systematic overview of original theoretical, experimental, and numerical studies in the building services engineering domain. It brings together different strands of the topic, guided by the two key features of energy savings and reduction of the pollutant emissions. Technical, economic, and energy efficiency aspects related to the design, modelling, optimisation, and operation of diverse building services systems are explored. This book includes various theoretical studies, numerical and optimisation models, experiments, and applications in this field, giving an emphasis to: indoor environment quality assurance; energy analysis, modelling, and optimisation of heating systems; improving the energy performance of refrigeration and air-conditioning systems; valorising the solar and geothermal energies; analysis of thermal energy storage technologies; hydraulic simulation and optimisation of water distribution systems; and improving the energy efficiency of water pumping. With 11 pedagogically structured chapters, containing numerous illustrations, tables, and examples, this book provides researchers, lecturers, engineers, and graduate students with a thorough guide to building service engineering.
Ignalina Rbmk 1500 A Source Book
DOWNLOAD
Author : Kazys Almenas
language : en
Publisher:
Release Date : 1998
Ignalina Rbmk 1500 A Source Book written by Kazys Almenas and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Nuclear power plants categories.
Natural Circulation In Water Cooled Nuclear Power Plants
DOWNLOAD
Author : International Atomic Energy Agency
language : en
Publisher: IAEA
Release Date : 2005
Natural Circulation In Water Cooled Nuclear Power Plants written by International Atomic Energy Agency and has been published by IAEA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Business & Economics categories.
Describes the state of knowledge of natural circulation in water cooled nuclear power plants and passive system reliability. The publication presents information on phenomena, models, predictive tools and experiments that currently support design and analysis of natural circulation systems, and highlights areas where additional research is needed.
Engineering Solutions For Sustainability
DOWNLOAD
Author : Jeffrey W. Fergus
language : en
Publisher: John Wiley & Sons
Release Date : 2015-08-06
Engineering Solutions For Sustainability written by Jeffrey W. Fergus and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-08-06 with Technology & Engineering categories.
This book contains a collection of papers presented at Engineering Solutions for Sustainability: Materials and Resources II, a special symposium organized as part of the TMS 2015 Annual Meeting & Exhibition and held in Orlando, Florida, March 15-19, 2015. With impending and burgeoning societal issues affecting both developed and emerging nations, the global engineering community has a responsibility and an opportunity to truly make a difference and contribute. The papers in this collection address what materials and resources are integral to meeting basic societal sustainability needs in critical areas of energy, transportation, housing, and recycling. Contributions focus on the engineering answers for cost-effective, sustainable pathways; the strategies for effective use of engineering solutions; and the role of the global engineering community. Authors share perspectives on the major engineering challenges that face our world today; identify, discuss, and prioritize engineering solution needs; and establish how these fit into developing global-demand pressures for materials and human resources.
Distillation Troubleshooting
DOWNLOAD
Author : Henry Z. Kister
language : en
Publisher: John Wiley & Sons
Release Date : 2011-11-30
Distillation Troubleshooting written by Henry Z. Kister and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-11-30 with Technology & Engineering categories.
THE FIRST BOOK OF ITS KIND ON DISTILLATION TECHNOLOGY The last half-century of research on distillation has tremendously improved our understanding and design of industrial distillation equipment and systems. High-speed computers have taken over the design, control, and operation of towers. Invention and innovation in tower internals have greatly enhanced tower capacity and efficiency. With all these advances, one would expect the failure rate in distillation towers to be on the decline. In fact, the opposite is the case: the tower failure rate is on the rise and accelerating. Distillation Troubleshooting collects invaluable hands-on experiences acquired in dealing with distillation and absorption malfunctions, making them readily accessible for those engaged in solving today's problems and avoiding tomorrow's. The first book of its kind on the distillation industry, the practical lessons it offers are a must for those seeking the elusive path to trouble-free distillation. Distillation Troubleshooting covers over 1,200 case histories of problems, diagnoses, solutions, and key lessons. Coverage includes: * Successful and unsuccessful struggles with plugging, fouling, and coking * Histories and prevention of tray, packing, and internals damage * Lessons taught by incidents and accidents during shutdowns, commissioning, and abnormal operation * Troubleshooting distillation simulations to match the real world * Making packing liquid distributors work * Plant bottlenecks from intermediate draws, chimney trays, and feed points * Histories of and key lessons from explosions and fires in distillation towers * Prevention of flaws that impair reboiler and condenser performance * Destabilization of tower control systems and how to correct it * Discoveries from shutdown inspections * Suppression of foam and accumulation incidents A unique resource for improving the foremost industrial separation process, Distillation Troubleshooting transforms decades of hands-on experiences into a handy reference for professionals and students involved in the operation, design, study, improvement, and management of large-scale distillation.