Download or read book Multiphysics Simulation in Buildings written by Oussama Souaihi and published by . This book was released on 2018 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical simulation play an important role in the design, engineering, operation and management of buildings. It can help reducing energy consumption, improving indoor air quality and thermal comfort and provide quantitative data supporting decision making, e.g. choosing the best solution for designing, retrofitting or choosing the optimal HVAC system. Besides, buildings are composed more and more of different complex elements and systems which make the simulation of only thermal physics in buildings not enough to evaluate their whole performance. All the involved physical phenomena like moisture, airflow and pollutants should be considered and coupled in order to reproduce the reality with the highest possible level of details. In this context, this PhD thesis presents the models and the simulations of multi-physics inside buildings using an in-house developed modular and object oriented tool called NEST. All the physics of the coupled heat, moisture, airflow and pollutants transfer that take place inside buildings are considered and solved. In addition, the software allows the simulation of a building system as a collection of different numerical elements, like walls, rooms, HVAC systems, outdoor, etc., connected with each other and able to exchange boundary conditions. In this manner any building configuration can be set and simulated. The physical and mathematical formulations of the implemented elements are presented. Then, in order to assure the credibility of the developed software, the implemented models are validated and verified with different test cases from the literature. The list of test cases cover all the aspects of heat, moisture, airflow and pollutants transfer in the whole building and it can be used as a reference list for the validation of other buildings simulation tools. Special emphasis is placed on the simulation of buildings performance in real applications. First, the hygrothermal behaviour in different public buildings with different climates conditions are analysed before retrofitting them. Several weak points in the thermal and moisture resistance of the façades layers are identified and thermal and moisture loads before and after the expected retrofitting solutions are evaluated. Second, a residential building (semidetached house) in Netherlands is simulated and the airflow, heat and CO 2 transfer inside it is studied in order to optimize the energy consumption while maintaining acceptable levels of thermal comfort and indoor air quality.

Download or read book Energy Simulation in Building Design written by Joseph Clarke and published by Routledge. This book was released on 2007-11-02 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the appearance of the first edition of 'Energy Simulation in Building Design', the use of computer-based appraisal tools to solve energy design problems within buildings has grown rapidly. A leading figure in this field, Professor Joseph Clarke has updated his book throughout to reflect these latest developments. The book now includes material on combined thermal/lighting and CFD simulation, advanced glazings, indoor air quality and photovoltaic components. This thorough revision means that the book remains the key text on simulation for architects, building engineering consultants and students of building engineering and environmental design of buildings. The book's purpose is to help architects, mechanical & environmental engineers and energy & facility managers to understand and apply the emerging computer methods for options appraisal at the individual building, estate, city, region and national levels. This is achieved by interspersing theoretical derivations relating to simulation within an evolving description of the built environment as a complex system. The premise is that the effective application of any simulation tool requires a thorough understanding of the domain it addresses.

Download or read book Building Infrastructure for Multiphysics Simulations written by Michael James McCourt and published by . This book was released on 2013 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the use of computer simulation for scientific discovery increases there is a growing need for reliable multiphysics simulations. Although an exact definition for multiphysics problems is difficult to state, these problems include simulations where two or more component models are coupled to simulate events beyond either individual component. Aware of the growing prevalence of multiphysics simulations, this work identifies potential impediments to efficient and stable computation and proposes procedures to address the concerns. We first introduce the implicitly coupled multiphysics framework, through which we limit the domain of problems we consider, and Jacobian-free NewtonKrylov methods, which will be the primary technique for solving these nonlinear systems. Kernel-based approximation theory is introduced, providing a method for coupling component models with different discretizations. These topics have both theoretical and computational implications which are later applied in the context of multiphysics simulations. Our first contribution is the analysis of preconditioning nonlinear systems produced during multiphysics simulations. The motivating application is computational plasma physics, specifically, the edge region of a tokamak reactor performing magnetic confinement fusion. For sufficiently difficult parameter choices, existing preconditioners have proved ineffective or inefficient at producing useful Newton steps. We analyze the various components of this simulation and determine why preconditioners acting on the entire simulation do not perform well. Using these insights we develop an operator-specific (or physics based) preconditioner which allows for better performance while improving parallel scalability. Preconditioning is an important component of the Jacobian-free NewtonKrylov method because it allows a faster solution of the Newton search directions. Equally critical, although less susceptible to poor performance, are the Jacobianvector products within the linear solvers which are approximated using Taylor series. We study this process in the multiphysics setting and propose improvements that allow for greater accuracy when two components on different scales are coupled together. The final issue we consider in multiphysics systems also receives the most treatment. Simulating a multiphysics system requires coupling between the individual components, and in this thesis we discuss the use of kernel-based scattered data interpolation to perform the coupling. A new technique, based on an orthonormal expansion of the kernel, is developed which allows us to evaluate meshfree radial basis interpolants in arbitrary dimensions without the ill-conditioning often present for accurate kernel choices. These eigenfunctions are derived using Hilbert-Schmidt theory, and tested on interpolation problems in up to five dimensions. After the eigenfunction method is validated, we show how it can be used to approximate derivatives of a function given only scattered data. Once this is proven, results are given for a multiphysics simulation using meshfree interpolation. These results are compared to the standard discretization scheme for interpolating between models, with higher order results possible using meshfree interpolation. Additionally, because the meshfree approach works with scattered data, it provides a more general method for coupling two models with mismatched grids. In addition to the viability of meshfree coupling for multiphysics, we also consider the computational cost. The preconditioning discussion from earlier is applied here to choose a good preconditioner for the fully coupled system, which is important for reducing the cost of linear solves. The remaining content focuses on other aspects of the eigenfunction expansion which are relevant to the wider computational community. Using the derivative approximation method created for coupling multiphysics components, we show how boundary value problems can be solved by collocation using the eigenfunction basis. We also explore the use of the eigenfunction technique in the Method of Particular Solutions, which demonstrates the benefit of solving elliptic problems with a joint collocation/Method of Fundamental Solutions approach. The final results deal with a statistical framework for determining appropriate parameterizations of kernels, which is necessary to realize the optimal interpolation accuracy discussed earlier. These methods have previously suffered from the ill-conditioning addressed by the eigenfunction approach, and, using the new stable basis, we reconsider their viability as predictive tools.

Download or read book Building Performance Simulation for Design and Operation written by Jan L.M. Hensen and published by Routledge. This book was released on 2019-04-24 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt: When used appropriately, building performance simulation has the potential to reduce the environmental impact of the built environment, to improve indoor quality and productivity, as well as to facilitate future innovation and technological progress in construction. Since publication of the first edition of Building Performance Simulation for Design and Operation, the discussion has shifted from a focus on software features to a new agenda, which centres on the effectiveness of building performance simulation in building life cycle processes. This new edition provides a unique and comprehensive overview of building performance simulation for the complete building life cycle from conception to demolition, and from a single building to district level. It contains new chapters on building information modelling, occupant behaviour modelling, urban physics modelling, urban building energy modelling and renewable energy systems modelling. This new edition keeps the same chapter structure throughout including learning objectives, chapter summaries and assignments. Moreover, the book: • Provides unique insights into the techniques of building performance modelling and simulation and their application to performance-based design and operation of buildings and the systems which service them. • Provides readers with the essential concepts of computational support of performance-based design and operation. • Provides examples of how to use building simulation techniques for practical design, management and operation, their limitations and future direction. It is primarily intended for building and systems designers and operators, and postgraduate architectural, environmental or mechanical engineering students.

Download or read book Building Energy Simulation written by Vishal Garg and published by CRC Press. This book was released on 2020-08-17 with total page 741 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of Building Energy Simulation includes studies of various components and systems of buildings and their effect on energy consumption, with the help of DesignBuilderTM, a front-end for the EnergyPlus simulation engine, supported by examples and exercises. The book employs a "learning by doing" methodology. It explains simulation-input parameters and how-to-do analysis of the simulation output, in the process explaining building physics and energy simulation. Divided into three sections, it covers the fundamentals of energy simulation followed by advanced topics in energy simulation and simulation for compliance with building codes and detailed case studies for comprehensive building energy simulation. Features: Focuses on learning building energy simulation while being interactive through examples and exercises. Explains the building physics and the science behind the energy performance of buildings. Encourages an integrated design approach by explaining the interactions between various building systems and their effect on energy performance of building. Discusses a how-to model for building energy code compliance including three projects to practice whole building simulation. Provides hands-on training of building energy simulation tools: DesignBuilderTM and EnergyPlus. Includes practical projects problems, appendices and CAD files in the e-resources section. Building Energy Simulation is intended for students and researchers in building energy courses, energy simulation professionals, and architects.

Download or read book Multiphysics Modelling and Simulation for Systems Design and Monitoring written by Mohamed Haddar and published by Springer. This book was released on 2015-01-03 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on the state of the art in the field of multiphysics systems. It consists of accurately reviewed contributions to the MMSSD’2014 conference, which was held from December 17 to 19, 2004 in Hammamet, Tunisia. The different chapters, covering new theories, methods and a number of case studies, provide readers with an up-to-date picture of multiphysics modeling and simulation. They highlight the role played by high-performance computing and newly available software in promoting the study of multiphysics coupling effects, and show how these technologies can be practically implemented to bring about significant improvements in the field of design, control and monitoring of machines. In addition to providing a detailed description of the methods and their applications, the book also identifies new research issues, challenges and opportunities, thus providing researchers and practitioners with both technical information to support their daily work and a new source of inspiration for their future research.

Download or read book Model Code for Service Life Design written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2006-01-01 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: fib Bulletin 34 addresses Service Life Design (SLD) for plain concrete, reinforced concrete and pre-stressed concrete structures, with a special focus on design provisions for managing the adverse effects of degradation. Its objective is to identify agreed durability related models and to prepare the framework for standardization of performance based design approaches. Four different options for SLD are given: - a full probabilistic approach, - a semi probabilistic approach (partial factor design), - deemed to satisfy rules, - avoidance of deterioration. The service life design approaches described in this document may be applied for the design of new structures, for updating the service life design if the structure exists and real material properties and/or the interaction of environment and structure can be measured (real concrete covers, carbonation depths), and for calculating residual service life. The bulletin is divided into five chapters: 1. General 2. Basis of design 3. Verification of Service Life Design 4. Execution and its quality management 5. Maintenance and condition control It also includes four informative annexes, which give background information and examples of procedures and deterioration models for the application in SLD. The format of Bulletin 34 follows the CEB-FIP tradition for Model Codes: the main provisions are given on the right-hand side of the page, and on the left-hand side, the comments. Note: An Italian translation of Bulletin 34 is also available; contact us for further details.

Download or read book Modelling Methods for Energy in Buildings written by Chris Underwood and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climate change mitigation and sustainable practices are now at the top of political and technical agendas. Environmental system modelling provides a way of appraising options and this book will make a significant contribution to the uptake of such systems. It provides knowledge of the principles involved in modelling systems, builds confidence amongst designers and offers a broad perspective of the potential of these new technologies. The aim of the book is to provide an understanding of the concepts and principles behind predictive modelling methods; review progress in the development of the modelling software available; and explore modelling in building design through international case studies based on real design problems.

Download or read book Fundamentals of Building Performance Simulation written by Ian Beausoleil-Morrison and published by Routledge. This book was released on 2020-08-27 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Building Performance Simulation pares the theory and practice of a multi-disciplinary field to the essentials for classroom learning and real-world applications. Authored by a veteran educator and researcher, this textbook equips graduate students and emerging and established professionals in engineering and architecture to predict and optimize buildings’ energy use. It employs an innovative pedagogical approach, introducing new concepts and skills through previously mastered ones and deepening understanding of familiar themes by means of new material. Covering topics from indoor airflow to the effects of the weather, the book’s 19 chapters empower learners to: Understand the models and assumptions underlying popular BPS tools Compare models, simulations, and modelling tools and make appropriate selections Recognize the effects of modelling choices and input data on simulation predictions And more. Each subject is introduced without reference to particular modelling tools, while practice problems at the end of each chapter provide hands-on experience with the tools of the reader’s choice. Curated reading lists orient beginners in a vast, cross-disciplinary literature, and the critical thinking skills stressed throughout prepare them to make contributions of their own. Fundamentals of Building Performance Simulation provides a much-needed resource for new and aspiring members of the building science community.

Download or read book Green Building Energy Simulation and Modeling written by V.S.K.V. Harish and published by Butterworth-Heinemann. This book was released on 2029-12-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Green Building Energy Simulation and Modeling presents essential insights into concepts and applications of building energy physics. The authors provide a brief, but rigorous, explanation of various modeling methods for building energy systems, order reduction techniques, and building energy simulation platforms (BESPs) that is followed by BES model validation techniques, testing and evaluation. The book provides designers with the tools and methods they need to validate building energy systems and seize every opportunity to achieve greater energy savings and higher rating scores. Provides green building computer code Presents tactics on how to use energy studies and simulation to make informed design decisions Helps readers understand how and when to apply the different types of energy simulation at the appropriate design stage Evaluates passive and active strategies for limiting energy consumption and producing energy onsite

Download or read book Multiphysics Modeling Using COMSOL 5 and MATLAB written by Roger W. Pryor and published by Mercury Learning and Information. This book was released on 2021-12-03 with total page 743 pages. Available in PDF, EPUB and Kindle. Book excerpt: COMSOL 5 and MATLAB are valuable software modeling tools for engineers and scientists. This updated edition includes five new models and explores a wide range of models in coordinate systems from 0D to 3D, introducing the numerical analysis techniques employed in COMSOL 5.6 and MATLAB software. The text presents electromagnetic, electronic, optical, thermal physics, and biomedical models as examples. It presents the fundamental concepts in the models and the step-by-step instructions needed to build each model. The companion files include all the built models for each step-by-step example presented in the text and the related animations, as specified. The book is designed to introduce modeling to an experienced engineer or can also be used for upper level undergraduate or graduate courses. FEATURES: Focuses on COMSOL 5.x and MATLAB models that demonstrate the use of concepts for later application in engineering, science, medicine, and biophysics for the development of devices and systems Includes companion files with executable copies of each model and related animations Includes detailed discussions of possible modeling errors and results Uses a step-by-step modeling methodology linked to the Fundamental Laws of Physics. The companion files are also available online by emailing the publisher with proof of purchase at [email protected].

Download or read book Advanced Building Simulation written by Ali Malkawi and published by Routledge. This book was released on 2004-07-29 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces recent advances in building simulation and outlines its historic development. Two important topics are described: uncertainty in simulation and coupled simulations, which are both closely linked to attempts to improve control and accuracy. This is followed by coverage of wind simulations and predictions, and then by an introduction to current systems and phenomenological modelling. Written by leading experts in the field both in the US and Europe, Advanced Building Simulation is an excellent graduate-level student textbook as well as a practical guide for architects, engineers and other construction professionals.

Download or read book Occupant Centric Simulation Aided Building Design written by William O'Brien and published by Taylor & Francis. This book was released on 2023-05-31 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Occupant-Centric Simulation-Aided Building Design promotes occupants as a focal point for the design process. This resource for established and emerging building designers and researchers provides theoretical and practical means to restore occupants and their needs to the heart of the design process. Helmed by leaders of the International Energy Agency Annex 79, this edited volume features contributions from a multi-disciplinary, globally recognized team of scholars and practitioners. Chapters on the indoor environment and human factors introduce the principles of occupant-centric design while chapters on selecting and applying models provide a thorough grounding in simulation-aided building design practice. A final chapter assembling detailed case studies puts the lessons of the preceding chapters into real-world context. In fulfillment of the International Energy Agency’s mission of disseminating research on secure and sustainable energy to all, Occupant-Centric Simulation-Aided Building Design is available as an Open Access Gold title. With a balance of fundamentals and design process guidelines, Occupant-Centric Simulation-Aided Building Design reorients the building design community toward buildings that recognize and serve diverse occupant needs, while aiming for superior environmental performance, based on the latest science and methods.

Download or read book Multiphysics Modeling With Finite Element Methods written by William B J Zimmerman and published by World Scientific Publishing Company. This book was released on 2006-10-25 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finite element methods for approximating partial differential equations that arise in science and engineering analysis find widespread application. Numerical analysis tools make the solutions of coupled physics, mechanics, chemistry, and even biology accessible to the novice modeler. Nevertheless, modelers must be aware of the limitations and difficulties in developing numerical models that faithfully represent the system they are modeling.This textbook introduces the intellectual framework for modeling with Comsol Multiphysics, a package which has unique features in representing multiply linked domains with complex geometry, highly coupled and nonlinear equation systems, and arbitrarily complicated boundary, auxiliary, and initial conditions. But with this modeling power comes great opportunities and great perils.Progressively, in the first part of the book the novice modeler develops an understanding of how to build up complicated models piecemeal and test them modularly. The second part of the book introduces advanced analysis techniques. The final part of the book deals with case studies in a broad range of application areas including nonlinear pattern formation, thin film dynamics and heterogeneous catalysis, composite and effective media for heat, mass, conductivity, and dispersion, population balances, tomography, multiphase flow, electrokinetic, microfluidic networks, plasma dynamics, and corrosion chemistry.As a revision of Process Modeling and Simulation with Finite Element Methods, this book uses the very latest features of Comsol Multiphysics. There are new case studies on multiphase flow with phase change, plasma dynamics, electromagnetohydrodynamics, microfluidic mixing, and corrosion. In addition, major improvements to the level set method for multiphase flow to ensure phase conservation is introduced.

Download or read book Automatic Reduction of Multi zone Models for Building Simulation written by Matthias Gladt and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2015-03-03 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal simulations are an important means to predict the energy performance of buildings or groups of buildings or even whole cities. In particular with long term simulations the performance is vital for achieving good results in an acceptable amount of time. Resistance-capacitance models are well suited for simulating multi-zone models or running long-term simulations or a combination of both. Automatic model reduction even of resistance-capacitance models may be needed in order to improve the peformance of building simulations. They aim at accurate energy calculation or accurate calculation of temperature profiles. Several ways of automatable model reduction are outlined in detail in the work at hand.

Download or read book Multiphysics Simulation by Design for Electrical Machines Power Electronics and Drives written by Marius Rosu and published by John Wiley & Sons. This book was released on 2017-12-18 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents applied theory and advanced simulation techniques for electric machines and drives This book combines the knowledge of experts from both academia and the software industry to present theories of multiphysics simulation by design for electrical machines, power electronics, and drives. The comprehensive design approach described within supports new applications required by technologies sustaining high drive efficiency. The highlighted framework considers the electric machine at the heart of the entire electric drive. The book also emphasizes the simulation by design concept—a concept that frames the entire highlighted design methodology, which is described and illustrated by various advanced simulation technologies. Multiphysics Simulation by Design for Electrical Machines, Power Electronics and Drives begins with the basics of electrical machine design and manufacturing tolerances. It also discusses fundamental aspects of the state of the art design process and includes examples from industrial practice. It explains FEM-based analysis techniques for electrical machine design—providing details on how it can be employed in ANSYS Maxwell software. In addition, the book covers advanced magnetic material modeling capabilities employed in numerical computation; thermal analysis; automated optimization for electric machines; and power electronics and drive systems. This valuable resource: Delivers the multi-physics know-how based on practical electric machine design methodologies Provides an extensive overview of electric machine design optimization and its integration with power electronics and drives Incorporates case studies from industrial practice and research and development projects Multiphysics Simulation by Design for Electrical Machines, Power Electronics and Drives is an incredibly helpful book for design engineers, application and system engineers, and technical professionals. It will also benefit graduate engineering students with a strong interest in electric machines and drives.

Download or read book Multiphysics Simulation written by Ercan M. Dede and published by Springer. This book was released on 2014-05-28 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights a unique combination of numerical tools and strategies for handling the challenges of multiphysics simulation, with a specific focus on electromechanical systems as the target application. Features: introduces the concept of design via simulation, along with the role of multiphysics simulation in today’s engineering environment; discusses the importance of structural optimization techniques in the design and development of electromechanical systems; provides an overview of the physics commonly involved with electromechanical systems for applications such as electronics, magnetic components, RF components, actuators, and motors; reviews the governing equations for the simulation of related multiphysics problems; outlines relevant (topology and parametric size) optimization methods for electromechanical systems; describes in detail several multiphysics simulation and optimization example studies in both two and three dimensions, with sample numerical code.