Download or read book Thermo Hydro Mechanical THM coupled simulations of innovative enhanced geothermal systems for heat and electricity production as well as energy storage written by Muhammad Haris and published by Cuvillier Verlag. This book was released on 2022-08-05 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enhanced geothermal systems (EGSs) evolved from the hot dry rock can provide a significant amount of energy while shifting towards negligible carbon emission. In order to investigate some important issues related to EGS, several scenarios have been analyzed using powerful numerical tools (FLAC3Dplus and TOUGH2MP-TMVOC). While conducting multiple hydraulic fracturing, it is observed that the newly created successive fracture’s configuration highly depends on the previous one under the influence of stress shadow. Therefore, the assumption of using similar multiple fracture geometries and shapes for energy exploitation may lead to erroneous estimations. A case study has been performed further using the engineering data of the GeneSys project in the North German Basin. Numerous scenarios have been investigated, and the optimized EGS project is proposed, whose installed power capacity of one side of the injection well declines from 7.17 MW to 5.08 MW over 30 years. Moreover, the Levelized cost of electricity is calculated at 5.46 c$/kWh, which is quite economical compared to the current electricity price. Finally, an innovative concept of regenerative EGS is proposed by storing surplus renewable energy in multiple hydraulic fractures that can reduce the reservoir temperature reduction rate. The results of continuous injection/production cycles depicted that a regenerative EGS could be achieved in reality.
Download or read book Water Flow Solute and Heat Transfer in Groundwater written by Alexander Yakirevich and published by MDPI. This book was released on 2021-01-06 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater is an essential and vital water resource for drinking water production, agricultural irrigation, and industrial processes. Having a better understanding of physical and chemical processes in aquifers enables more reliable decisions and reduces investments concerning water management. This Special Issue on “Water Flow, Solute, and Heat Transfer, in Groundwater” of Water focuses on the recent advances in groundwater dynamics, and it includes high-quality papers that cover a wide range of issues on different aspects related to groundwater: protection from contamination, recharge, heat transfer, hydraulic parameters estimation, well hydraulics, microbial community, colloid transport, and mathematical models. This integrative volume aims to transfer knowledge to hydrologists, hydraulic engineers, and water resources planners, who are engaged in the sustainable development of groundwater resources.
Download or read book Geothermal Energy written by Marc A. Rosen and published by John Wiley & Sons. This book was released on 2017-01-30 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensively covers geothermal energy systems that utilize ground energy in conjunction with heat pumps to provide sustainable heating and cooling The book describes geothermal energy systems that utilize ground energy in conjunction with heat pumps and related technologies to provide heating and cooling. Also discussed are methods to model and assess such systems, as well as means to determine potential environmental impacts of geothermal energy systems and their thermal interaction. The book presents the most up-to-date information in the area. It provides material on a range of topics, from thermodynamic concepts to more advanced discussions of the renewability and sustainability of geothermal energy systems. Numerous applications of such systems are also provided. Geothermal Energy: Sustainable Heating and Cooling Using the Ground takes a research orientated approach to provide coverage of the state of the art and emerging trends, and includes numerous illustrative examples and case studies. Theory and analysis are emphasized throughout, with detailed descriptions of models available for vertical and horizontal geothermal heat exchangers. Key features: Explains geothermal energy systems that utilize ground energy in conjunction with heat pumps to provide heating and cooling, as well as related technologies such as thermal energy storage. Describes and discusses methods to model and analyze geothermal energy systems, and to determine their potential environmental impacts and thermal interactions. Covers various applications of geothermal energy systems. Takes a research orientated approach to provide coverage of the state of the art and emerging trends. Includes numerous illustrative examples and case studies. The book is key for researchers and practitioners working in geothermal energy, as well as graduate and advanced undergraduate students in departments of mechanical, civil, chemical, energy, environmental, process and industrial engineering.
Download or read book Development of coupled THM models for reservoir stimulation and geo energy production with supercritical CO2 as working fluid written by Jianxing Liao and published by Cuvillier Verlag. This book was released on 2020-07-28 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, two specific numerical models have been developed to address the issues associated with utilization of supercritical CO2, like fracture creation, proppant placement and fracture closure in unconventional gas reservoirs, reservoir stimulation, heat production and CO2 sequestration in deep geothermal reservoirs, respectively. In unconventional gas reservoir, the model consisting of classic fracture model, proppant transport model as well as temperature-sensitive fracturing fluids (CO2, thickened CO2 and guar gum) has been integrated into the popular THM coupled framework (TOUGH2MP-FLAC3D), which has the ability to simulate single fracture propagation driven by different fracturing fluids in non-isothermal condition. To characterize the fracture network propagation and internal multi fluids behavior in deep geothermal reservoirs, an anisotropic permeability model on the foundation of the continuum anisotropic damage model has been developed and integrated into the popular THM coupled framework (TOUGH2MP-FLAC3D) as well. This model has the potential to simulate the reservoir stimulation and heat extraction based on a CO2-EGS concept.
Download or read book Geoenergy Modeling III written by Norihiro Watanabe and published by Springer. This book was released on 2016-11-10 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on numerical modeling of deep hydrothermal and petrothermal systems in fractured georeservoirs for utilization in Geothermal Energy applications. The authors explain the particular challenges and approaches to modeling heat transport and high-throughput flow in multiply fractured porous rock formations. In order to help readers gain a system-level understanding of the necessary analysis, the authors include detailed examples of growing complexity as the techniques explained in the text are introduced. The coverage culminates with the fully-coupled analysis of real deep geothermal test-sites located in Germany and France.
Download or read book Energy Geotechnics written by Alessio Ferrari and published by Springer. This book was released on 2018-08-23 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects selected full papers presented at the International Symposium on Energy Geotechnics 2018 (SEG-2018), held on 25th – 28th September 2018, at the Swiss Federal Institute of Technology in Lausanne (EPFL). It covers a wide range of topics in energy geotechnics, including energy geostructures, energy geostorage, thermo-hydro-chemo-mechanical behaviour of geomaterials, unconventional resources, hydraulic stimulation, induced seismicity, CO2 geological storage, and nuclear waste disposal as well as topics such as tower and offshore foundations. The book is intended for postgraduate students, researchers and practitioners working on geomechanics and geotechnical engineering for energy-related applications.
Download or read book Coupled Thermo Hydro Mechanical Processes in Fractured Rock Masses written by Fengshou Zhang and published by Springer Nature. This book was released on 2023-09-11 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of thermo-hydro-mechanical coupled processes in fractured rock masses has close relevance to energy-related deep earth engineering activities, such as enhanced geothermal systems, geological disposal of radioactive waste, sequestration of CO2, long-term disposal of waste water and recovery of hydrocarbons from unconventional reservoirs. Despite great efforts by engineers and researchers, comprehensive understanding of the thermo-hydro-mechanical coupled processes in fractured rock mass remains a great challenge. The discrete element method (DEM), originally developed by Dr. Peter Cundall, has become widely used for the modeling of a rock mass, including its deformation, damage, fracturing and stability. DEM modeling of the coupled thermo-hydro-mechanical processes in fractured rock masses can provide some unique insights, to say the least, for better understanding of those complex issues. The authors of this book have participated in various projects involving DEM modeling of coupled thermo-hydro-mechanical processes during treatment of a rock mass by fluid injection and/or extraction and have provided consulting services to some of the largest oil-and-gas companies in the world. The breadth and depth of our engineering expertise are reflected by its successful applications in the major unconventional plays in the world, including Permian, Marcellus, Bakken, Eagle Ford, Horn River, Chicontepec, Sichuan, Ordos and many more. The unique combination of the state-of-the-art numerical modeling techniques with state-of-the-practice engineering applications makes the presented material relevant and valuable for engineering practice. We believe that it is beneficial to share the advances on this subject and promote some further development.
Download or read book Geothermal Heat Pump and Heat Engine Systems written by Andrew Chiasson and published by . This book was released on 2016 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Geothermal Heat Pump Systems: Theory and Practice comprehensively covers the theory, fundamental principles and practical applications of geothermal heat pump systems. It takes an interdisciplinary approach considering the disciplines of geoscience, thermodynamics, heat transfer, and fluid mechanics, while keeping in mind the engineering and practical constraints of the real world.The main focus of this book is geothermal heat pump applications for buildings, however the reader is introduced to the bigger picture of geothermal energy utilization, of which geothermal heat pumps is just one type. Methods and equipment used to convert stored thermal energy into useful energy are also discussed and different ground heat exchangers are considered. Geothermal Heat Pump Systems: Theory and Practice contains end of chapter exercise problems and discussion questions and is accompanied by a website hosting practical design software tools that allow the solution of complex, real problems. It also includes presentation files with lecture slides."--
Download or read book Geothermal Power Generation written by Ron DiPippo and published by Woodhead Publishing. This book was released on 2016-05-25 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geothermal Power Generation: Developments and Innovation 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. As geothermal resources are considered renewable and can be used to generate baseload electricity while producing very low levels of greenhouse gas emissions, they can play a key role in future energy needs. This book, edited by a highly respected expert, provides a comprehensive overview of the major aspects of geothermal power production. The chapters, contributed by specialists in their respective areas, cover resource discovery, resource characterization, energy conversion systems, and design and economic considerations. The final section provides a range of fascinating case studies from across the world, ranging from Larderello to Indonesia. Users will find this to be an essential text for research and development professionals and engineers in the geothermal energy industry, as well as postgraduate researchers in academia who are working on geothermal energy. Provides readers with a comprehensive and systematic overview of geothermal power generation Presents 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 a world authority in the field, with chapters contributed by experts in their particular areas Includes comprehensive case studies from across the world, ranging from Larderello to Indonesia
Download or read book Induced Seismic Events written by Peter Knoll and published by Springer Science & Business Media. This book was released on 1996-07-30 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reprint from Pure and Applied Geophysics (PAGEOPH), Volume 147 (1996), No. 2
Download or read book Project Summary Data Thermal and Mechanical Energy Storage Program written by United States. Department of Energy. Division of Energy Storage Systems and published by . This book was released on 1979 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particle scale Simulations for Geothermal Energy Applications written by Faras Al Balushi and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geothermal energy has the potential to develop into a reliable source of clean and renewable energy due to its widespread availability and minimal carbon dioxide emission during electricity generation. Due to the high temperature of such reservoirs, technologies are continuously being developed to reduce the cost of extracting heat and extend the lifetime of the geothermal systems for profitable heat production. One of the main challenges hindering the further development of geothermal systems is the low heat extraction efficiency characterized by low-temperature produced fluids. In enhanced geothermal systems, where fluid injected flows directly through the geothermal formation, thermal breakthrough or "short-circuiting" causes fast cooling of the geothermal formation due to the presence of shortcut paths connecting the injector well to the producer well. Such an occurrence may lead to the temporary shutdown of the geothermal plant, leaving an enormous amount of untapped heat behind. Efforts to tackle this issue have been focused on delaying thermal breakthrough rather than achieving uniform heat sweeping from the geothermal systems. No technologies or methods are currently available to achieve uniform heat extraction from EGS. To fill this gap, we propose a novel concept of temperature-sensitive proppants to achieve self-adjustable fracture conductivity. Through particle-scale numerical simulations, we evaluate the performance of such proppants for different operating conditions and material properties. My numerical results showed that the permeability of such proppants is affected by in-situ conditions, material properties, and geometric properties. The developed model can be utilized to comprehensively understand the performance of such temperature-sensitive proppants at different operating conditions. Field-scale simulations confirmed the feasibility of using the proposed temperature-sensitive proppants in enhancing heat extraction from EGS by ~50% over 50 years of production when the proposed proppants are used compared to typical proppants with no temperature dependency. Alternatively, closed-loop geothermal systems can be considered, where the working fluid is circulated inside the wellbore. The heat exchange efficiency of such systems is typically low, which limits the use of the produced heat for direct heating applications. In this study, we introduce a method of improving heat exchange between the wellbore and the geothermal formation utilizing coated proppants. Based on numerical simulations, the enhancement of proppant thermal conductivity is discussed. Particle-scale analysis showed that coating sand proppants with a thin layer of copper coating may increase its effective thermal conductivity seven times. Increasing proppant particulate coating thickness further increases the effective thermal conductivity by an order of magnitude. In addition, smaller proppants showed higher effective thermal conductivity compared to larger proppants due to the increased contact with the neighboring particles, resulting in lower resistance to heat conduction. Such conductive proppants can enhance heat conduction between the geothermal formation and the wellbore, increasing the heat extraction efficiency of closed-loop geothermal systems. Drilling costs account for the majority of the cost of developing a geothermal system. During drilling, thief zones (permeable zones) may be encountered. Moreover, fractures may be induced due to the high circulating density of the drilling fluid. If such fractures are left unplugged, excessive fluid loss may occur, which may cause well instability issues or may lead to losing the well in extreme cases. Using lost circulation material (LCM) is a cheap and effective way to prevent further drilling fluid loss to the formation. Granular particles are typically used due to their cost and their ability to form a tight and stable seal. Understanding the performance of such particles after bridging is essential to ensure their stability under fluctuating operating conditions. Here, the sealing performance of granular particles after bridging is discussed. Our analysis revealed that the shape of the particles is one of the most influential factors that impact the sensitivity of such particles to closure stress. Furthermore, the sensitivity of the particle pack permeability to friction is influenced by the particle shape. Numerical simulations offer considerable advantages over laboratory experiments, especially for geothermal systems due to the difficulty in accurately reproducing the elevated temperature. In this study, different numerical tools are utilized to model and design particulates that can enhance the heat extraction efficiency of both open- and closed-loop geothermal systems. Using numerical simulations allows easier control of the design parameters as well as operating conditions to avoid repetitive and costly laboratory experiments that may require different samples from different vendors. The numerical workflow used is validated against laboratory experiments and analytical as well as empirical equations.
Download or read book Geothermal Energy Systems written by Ernst Huenges and published by John Wiley & Sons. This book was released on 2011-08-24 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geothermal Energy Systems The book encounters basic knowledge about geothermal technology for the utilization of geothermal resources. The book helps to understand the basic geology needed for the utilization of geothermal energy, shows up the practice to make access to geothermal reservoirs by drilling and the engineering of the reservoir by enhancing methods. The book describes the technology to make use of the Earth?s heat for direct use, power, and/or chill and gives boundary conditions for its economic and environmental utilization. A special focus is made on enhanced or engineered geothermal systems (EGS) which are based on concepts which bring a priori less productive reservoirs to an economic use. From the contents: Reservoir Definition Exploration Methods Drilling into Geothermal Reservoirs Enhancing Geothermal Reservoirs Geothermal Reservoir Simulation Energetic Use of EGS Reservoirs Economic Performance and Environmental Assessment Deployment of Enhanced Geothermal Systems plants and CO2-mitigation
Download or read book FEFLOW written by Hans-Jörg G. Diersch and published by Springer Science & Business Media. This book was released on 2013-11-22 with total page 1018 pages. Available in PDF, EPUB and Kindle. Book excerpt: FEFLOW is an acronym of Finite Element subsurface FLOW simulation system and solves the governing flow, mass and heat transport equations in porous and fractured media by a multidimensional finite element method for complex geometric and parametric situations including variable fluid density, variable saturation, free surface(s), multispecies reaction kinetics, non-isothermal flow and multidiffusive effects. FEFLOW comprises theoretical work, modeling experiences and simulation practice from a period of about 40 years. In this light, the main objective of the present book is to share this achieved level of modeling with all required details of the physical and numerical background with the reader. The book is intended to put advanced theoretical and numerical methods into the hands of modeling practitioners and scientists. It starts with a more general theory for all relevant flow and transport phenomena on the basis of the continuum approach, systematically develops the basic framework for important classes of problems (e.g., multiphase/multispecies non-isothermal flow and transport phenomena, discrete features, aquifer-averaged equations, geothermal processes), introduces finite-element techniques for solving the basic balance equations, in detail discusses advanced numerical algorithms for the resulting nonlinear and linear problems and completes with a number of benchmarks, applications and exercises to illustrate the different types of problems and ways to tackle them successfully (e.g., flow and seepage problems, unsaturated-saturated flow, advective-diffusion transport, saltwater intrusion, geothermal and thermohaline flow).
Download or read book Geothermal Energy written by William E. Glassley and published by CRC Press. This book was released on 2011-06-03 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: Historically, cost effective, reliable, sustainable, and environmentally friendly, use of geothermal energy has been limited to areas where obvious surface features pointed to the presence of a shallow local heat source, such as hot springs and volcanoes. However, recent technological advances have dramatically expanded the range and size of viable resources, especially for applications such as modular power generation, home heating, and other applications that can use heat directly. These recent developments have greatly expanded opportunities for utilizing geothermal energy. Reflecting current interest in alternative energy, Geothermal Energy: Renewable Energy and the Environment explores where geothermal energy comes from and how to find it, how it can be accessed, successful applications, and improvements for future uses. The author reviews the background, theory, power generation, applications, strengths, weaknesses, and practical techniques for implementing geothermal energy projects. He stresses the links between acquisition and consumption and the environment. Packed with real world case studies and practical implementation steps, the book covers geosciences principles, exploration concepts and methods, drilling operations and techniques, equipment needs, and economic and environmental topics. Each chapter includes an annotated list of key sources that provide useful information beyond that contained in the text. The minor environmental impacts caused by geothermal energy gives it the potential to play an important role in the transition from fossil fuels to more sustainable fuels. Successful deployment, however, requires that the resource be matched to the application being developed. Rigorously covering all aspects of geothermal energy, this book provides up-to-date scientific information that can be used to discern applications and regions best suited for geothermal energy. Author William E. Glassley was recently interviewed on The Kathleen Show about using geothermal energy to heat and cool our homes.
Download or read book Geothermal Energy Initiative written by United States. Congress. Senate. Committee on Energy and Natural Resources and published by . This book was released on 2008 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geothermal Reservoir Engineering written by Malcomm Grant and published by Elsevier. This book was released on 2013-02-07 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geothermal Reservoir Engineering offers a comprehensive account of geothermal reservoir engineering and a guide to the state-of-the-art technology, with emphasis on practicality. Topics covered include well completion and warm-up, flow testing, and field monitoring and management. A case study of a geothermal well in New Zealand is also presented. Comprised of 10 chapters, this book opens with an overview of geothermal reservoirs and the development of geothermal reservoir engineering as a discipline. The following chapters focus on conceptual models of geothermal fields; simple models that illustrate some of the processes taking place in geothermal reservoirs under exploitation; measurements in a well from spudding-in up to first discharge; and flow measurement. The next chapter provides a case history of one well in the Broadlands Geothermal Field in New Zealand, with particular reference to its drilling, measurement, discharge, and data analysis/interpretation. The changes that have occurred in exploited geothermal fields are also reviewed. The final chapter considers three major problems of geothermal reservoir engineering: rapid entry of external cooler water, or return of reinjected water, in fractured reservoirs; the effects of exploitation on natural discharges; and subsidence. This monograph serves as both a text for students and a manual for working professionals in the field of geothermal reservoir engineering. It will also be of interest to engineers and scientists of other disciplines.
