Download or read book Numerical Code Comparison Project A Necessary Step Towards Confidence in Geothermal Reservoir Simulators written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A necessary first step in resolving differences and in evaluating the usefulness of numerical simulators for geothermal reservoir analysis is the comparison of simulator results for a set of well-specified problems involving processes applicable in reservoir analysis. Under the direction of DOE'S Geothermal Reservoir Engineering Management Program (GREMP), a set of six test problems has been developed in an attempt to meet this need. The problem set covers a range of reservoir situations including single- and two-phase flow under 1, 2, and 3 dimensional conditions. Each problem has been test run to insure that the parameter specifications will yield workable solutions, and in several cases analytical solutions are available for comparison. Brief descriptions of the problems are given in each problem, the desired grid and time-step sizes were specified to minimize differences in results due to numerical discretization.
Download or read book Geothermal Reservoir Engineering written by Malcolm Alister Grant and published by Academic Press. This book was released on 2011-04-01 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: As nations alike struggle to diversify and secure their power portfolios, geothermal energy, the essentially limitless heat emanating from the earth itself, is being harnessed at an unprecedented rate. For the last 25 years, engineers around the world tasked with taming this raw power have used Geothermal Reservoir Engineering as both a training manual and a professional reference. This long-awaited second edition of Geothermal Reservoir Engineering is a practical guide to the issues and tasks geothermal engineers encounter in the course of their daily jobs. The book focuses particularly on the evaluation of potential sites and provides detailed guidance on the field management of the power plants built on them. With over 100 pages of new material informed by the breakthroughs of the last 25 years, Geothermal Reservoir Engineering remains the only training tool and professional reference dedicated to advising both new and experienced geothermal reservoir engineers. - The only resource available to help geothermal professionals make smart choices in field site selection and reservoir management - Practical focus eschews theory and basics- getting right to the heart of the important issues encountered in the field - Updates include coverage of advances in EGS (enhanced geothermal systems), well stimulation, well modeling, extensive field histories and preparing data for reservoir simulation - Case studies provide cautionary tales and best practices that can only be imparted by a seasoned expert
Download or read book Proceedings of the New Zealand Geothermal Workshop written by and published by . This book was released on 1980 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sequential implicit Newton s Method for Geothermal Reservoir Simulation written by Zhi Yang Wong and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical simulation of thermal multiphase fluid flow poses significant difficulties for nonlinear solvers. One approach to this problem is to solve the entire nonlinear system of equations simultaneously with a fully coupled method. However, due to the strong coupling and multiphysics interactions between equations, it is difficult to analyze and challenging to design solvers using this fully coupled method. Instead, a sequential-implicit method splits the multiphysics problem into different subproblems so that they can be each solved separately. The research described in this thesis developed and investigated sequential-implicit methods for geothermal simulation. The sequential-implicit method isolates each of the subproblems and enables the use of specialized solvers for each separate subproblem. Once each subproblem is solved in an efficient manner, the entire multiphysics problem is coupled through a sequential-implicit method. However, these sequential-implicit methods can face difficulties converging to the coupled solution. This thesis describes various sequential-implicit methods that reduce the computational cost of subsurface geothermal simulations by improving their nonlinear convergence. This split of the different physics allows for more specialized solvers such as multiscale finite volume or linear solver preconditioning methods to be built upon it. We demonstrated that for sequential-implicit geothermal simulations, a hybrid constraint strategy is necessary. This hybrid approach involves imposing a fixed pressure constraint for single-phase cells (control volumes) and a fixed density for two-phase cells. However, numerical comparisons showed that the outer loop convergence for the hybrid method on complex scenarios performed poorly in comparison to the fully coupled method. To improve on the outer loop convergence, a modified-sequential fully implicit method was investigated. Although the modified sequential-implicit method improves the outer loop convergence, the additional computational cost of the modified-sequential fully implicit method could diminish the gains from the improved convergence. One of the main contributions of this work is the development of a sequential-implicit Newton's method. Sequential-implicit methods often suffer from slow convergence when there is a strong coupling between the individual subproblems. This is due to the slow linear convergence rate of the fixed-point iteration that is used in current sequential-implicit methods. This new sequential-implicit Newton's method follows the same sequential scheme as the current sequential-implicit fixed-point method, but with a faster quadratic convergence rate compared to the current linear convergence rate. This method is not only applicable to geothermal simulation but also to all sequential-implicit multiphysics simulations. We demonstrated the effectiveness of this approach on two different multiphysics porous media problems: flow-thermal in geothermal simulation and flow-mechanics in geomechanics reservoir simulation. The numerical experiments show an improvement in outer loop convergence across all multiphysics problems and test cases considered. For some specific cases where there was a strong coupling, up to two orders of magnitude improvement was seen in the outer loop convergence for the sequential-implicit Newton's method. Following these investigations of the sequential-implicit method, we developed a sequential-implicit nonlinear solver to better solve a condensation problem in fully coupled geothermal simulation. This condensation problem is associated with the flow of cold water into a cell that is at saturated conditions that is also known as a ``negative compressibility'' problem. In order to deal with this problem, the nonlinear solver must be modified. We developed a sequential-implicit nonlinear solution strategy that overcomes this nonlinear convergence problem associated with the condensation front. For one-dimensional problems, this nonlinear solution strategy converged for all timesteps sizes, while the fully coupled strategy only converged for a limited sized timestep. Furthermore, for a two-dimensional heterogeneous problem, the largest Courant-Friedrichs-Lewy (CFL) number for this method is at least an order of magnitude larger than the CFL number that can be used with the fully coupled approach.
Download or read book Geothermal Energy Technology written by and published by . This book was released on 1983 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Renewable Energy Systems written by Martin Kaltschmitt and published by Springer. This book was released on 2012-12-06 with total page 1898 pages. Available in PDF, EPUB and Kindle. Book excerpt: Humanity is facing a steadily diminishing supply of fossil fuels, causing researchers, policy makers, and the population as a whole to turn increasingly to alternative and especially renewable sources of energy to make up this deficit. Gathering over 80 peer-reviewed entries from the Encyclopedia of Sustainability Science and Technologies, Renewable Energy Systems provides an authoritative introduction to a wide variety of renewable energy sources. State-of-the-art coverage includes geothermal power stations, ocean energy, renewable energy from biomass, waste to energy, and wind power. This comprehensive, two-volume work provides an excellent introduction for those entering these fields, as well as new insights for advanced researchers, industry experts, and decision makers.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 780 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 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.
Download or read book Workshop Report written by and published by . This book was released on with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Greenhouse Gas Protocol written by and published by World Business Pub.. This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The GHG Protocol Corporate Accounting and Reporting Standard helps companies and other organizations to identify, calculate, and report GHG emissions. It is designed to set the standard for accurate, complete, consistent, relevant and transparent accounting and reporting of GHG emissions.
Download or read book An Introduction to Reservoir Simulation Using MATLAB GNU Octave written by Knut-Andreas Lie and published by Cambridge University Press. This book was released on 2019-08-08 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents numerical methods for reservoir simulation, with efficient implementation and examples using widely-used online open-source code, for researchers, professionals and advanced students. This title is also available as Open Access on Cambridge Core.
Download or read book Transport Phenomena in Porous Media II written by I. Pop and published by Elsevier. This book was released on 2002-06-20 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transport phenomena in porous media continues to be a field which attracts intensive research activity. This is primarily due to the fact that it plays an important and practical role in a large variety of diverse scientific applications. Transport Phenomena in Porous Media II covers a wide range of the engineering and technological applications, including both stable and unstable flows, heat and mass transfer, porosity, and turbulence.Transport Phenomena in Porous Media II is the second volume in a series emphasising the fundamentals and applications of research in porous media. It contains 16 interrelated chapters of controversial, and in some cases conflicting, research, over a wide range of topics. The first volume of this series, published in 1998, met with a very favourable reception. Transport Phenomena in Porous Media II maintains the original concept including a wide and diverse range of topics, whilst providing an up-to-date summary of recent research in the field by its leading practitioners.
Download or read book Blue Book on Geothermal Resources written by and published by . This book was released on 1999 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermo Hydro Mechanical Chemical Processes in Fractured Porous Media Modelling and Benchmarking written by Olaf Kolditz and published by Springer. This book was released on 2014-11-26 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present book provides guidance to understanding complicated coupled processes based on the experimental data available and implementation of developed algorithms in numerical codes. Results of selected test cases in the fields of closed-form solutions (e.g., deformation processes), single processes (such as groundwater flow) as well as coupled processes are presented. It is part of the OpenGeoSys initiative - an open source project to share knowledge and experience in environmental analysis and scientific computation with the community.
Download or read book Principles of Applied Reservoir Simulation written by John R. Fanchi and published by Elsevier. This book was released on 2005-12-08 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simulate reservoirs effectively to extract the maximum oil, gas and profit, with this book and free simlation software on companion web site.
Download or read book Geothermal Power Generation written by Ronald DiPippo and published by Elsevier. This book was released on 2024-10-11 with total page 977 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geothermal Power Generation, New Developments and Innovations, Second Edition provides an update to the advanced energy technologies that are urgently required to meet the challenges of economic development, climate change mitigation, and energy security. Edited by respected and leading experts in the field, this book provides a comprehensive overview of the major aspects of geothermal power production. Chapters cover resource discovery, resource characterization, energy conversion systems, design, economic considerations, and a range of fascinating and updated case studies from across the world.Geothermal resources are considered renewable and are currently the only renewable source able to generate baseload electricity while producing very low levels of greenhouse gas emissions, thus playing a key role in future energy needs. - Provides readers with a comprehensive and systematic overview of geothermal power generation - Presents an update to advanced energy technologies that are urgently required to meet the challenges of economic development, climate change mitigation, and energy security - Edited by authorities in the field and contributed to by global experts in their areas - Supports sustainability and the United Nations Sustainable Development Goals (UN SDGs) 7, 9, 11 and 13
Download or read book Molecular Thermodynamics of Fluid Phase Equilibria written by John M. Prausnitz and published by Pearson Education. This book was released on 1998-10-22 with total page 1150 pages. Available in PDF, EPUB and Kindle. Book excerpt: The classic guide to mixtures, completely updated with new models, theories, examples, and data. Efficient separation operations and many other chemical processes depend upon a thorough understanding of the properties of gaseous and liquid mixtures. Molecular Thermodynamics of Fluid-Phase Equilibria, Third Edition is a systematic, practical guide to interpreting, correlating, and predicting thermodynamic properties used in mixture-related phase-equilibrium calculations. Completely updated, this edition reflects the growing maturity of techniques grounded in applied statistical thermodynamics and molecular simulation, while relying on classical thermodynamics, molecular physics, and physical chemistry wherever these fields offer superior solutions. Detailed new coverage includes: Techniques for improving separation processes and making them more environmentally friendly. Theoretical concepts enabling the description and interpretation of solution properties. New models, notably the lattice-fluid and statistical associated-fluid theories. Polymer solutions, including gas-polymer equilibria, polymer blends, membranes, and gels. Electrolyte solutions, including semi-empirical models for solutions containing salts or volatile electrolytes. Coverage also includes: fundamentals of classical thermodynamics of phase equilibria; thermodynamic properties from volumetric data; intermolecular forces; fugacities in gas and liquid mixtures; solubilities of gases and solids in liquids; high-pressure phase equilibria; virial coefficients for quantum gases; and much more. Throughout, Molecular Thermodynamics of Fluid-Phase Equilibria strikes a perfect balance between empirical techniques and theory, and is replete with useful examples and experimental data. More than ever, it is the essential resource for engineers, chemists, and other professionals working with mixtures and related processes.
