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 Geothermal Well Downhole Heat Exchanger Design Analysis written by David Brian Kreitlow and published by . This book was released on 1977 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: The low temperature geothermal resource at Klamath Falls, Oregon is widely used for heating buildings. A common technique for using this resource consists of a heat exchanger down in the well inside a casing which extends the full length of the well. Slots are cut in the casing to allow circulation of the geothermal water into the casing and past the downhole heat exchanger. This results in thermosyphoning between the inside and outside of the casing. Mathematical models of thermosyphoning through the well casing were developed for both with and without downhole heat exchanger present. Results of the model without heat exchanger present showed that thermosyphoning is sufficient to account for observed flow rates through the casing. Model results with heat exchanger included show the substantial influence of thermosyphoning on heat transfer rates and indicate several promising approaches to maximizing output. Because of the importance of scaling and corrosion on the success of a downhole heat exchanger installation, a study of available literature on scaling and corrosion relevant to downhole heat exchangers in low temperature geothermal systems was made and recommendations for corrosion control were developed. Scaling was not deemed severe enough to justify available control measures.

Download or read book An Introduction to Thermogeology written by David Banks and published by John Wiley & Sons. This book was released on 2009-01-26 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of the heat stored in the shallow subsurface for space heating (ground source heat) is widely used in North America and many European nations, such as Sweden, and is regarded as the most important and reliable 'green' space heating technology. In many nations, including Britain, the technology remains poorly understood and under used. This situation is about to change, however, with the UK market for ground source heat pumps growing at over 100% per annum. This book offers practical guidance and will equip engineers, planners and geologists with the fundamental skills to assess and implement this new technology and to introduce them to the science behind thermogeology.

Download or read book Underground Thermal Energy Storage written by Kun Sang Lee and published by Springer Science & Business Media. This book was released on 2012-10-12 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Underground thermal energy storage (UTES) provide us with a flexible tool to combat global warming through conserving energy while utilizing natural renewable energy resources. Primarily, they act as a buffer to balance fluctuations in supply and demand of low temperature thermal energy. Underground Thermal Energy Storage provides an comprehensive introduction to the extensively-used energy storage method. Underground Thermal Energy Storage gives a general overview of UTES from basic concepts and classifications to operation regimes. As well as discussing general procedures for design and construction, thermo-hydro geological modeling of UTES systems is explained. Finally, current real life data and statistics are include to summarize major global developments in UTES over the past decades. The concise style and thorough coverage makes Underground Thermal Energy Storage a solid introduction for students, engineers and geologists alike.

Download or read book Geothermal Downhole Heat Exchangers written by He-Song Pan and published by . This book was released on 1983 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shallow Geothermal Systems written by Deutsche Gesellschaft für Geotechnik and published by John Wiley & Sons. This book was released on 2016-09-06 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recommendations summarise the state of the art. Their aim is the proper exploitation of the ground for geothermal purposes without adversely affecting the ground or the groundwater on the one hand and the operation of the system and nearby buildings on the other. The recommendations should be used during consulting, design, installation and operation in order to achieve optimum and sustainable use of the ground at a specific location. Authorities responsible for supervising and approving projects can use the recommendations as a guide when taking decisions and making stipulations. The Geothermal Energy Study Group was set up in Bochum in 2004 and became the joint DGGV/DGGT study group in 2007. Some 20 specialists from universities, authorities and engineering consultants are active in the group and meet two or three times a year.

Download or read book Testing and Modeling of Downhole Heat Exchangers in Shallow Geothermal Systems written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are reported of work on: characterizing flow in wells with perforated casings with and without downhole heat exchangers (DHE) installed, determining energy extraction rates for conventional DHES in both cased and uncased wells, and modeling of DHE systems to predict effects of heat exchangers and well variable changes.

Download or read book Volume II Low Enthalpy Geothermal Energy written by Rajandrea Sethi and published by MDPI. This book was released on 2020-12-10 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low enthalpy geothermal energy has a great potential to reduce the climate impact of building heating and cooling systems. The use of this renewable energy source involves a number of scientific disciplines including energy engineering, heat transfer, geology, hydrogeology, chemistry, and economics. Low enthalpy geothermal energy, i.e., the underground heat available at temperatures below 90°C, has great potential in terms of reducing the climate impact of heating and cooling buildings. It can also be employed for other thermal uses, such as industrial processes, road de-icing, and bathing. The Special Issue “Volume II: Low Enthalpy Geothermal Energy” includes seven articles that discuss the topic from the following points of view: mapping of shallow geothermal potential, recent developments for enhancing the performance of borehole heat exchangers, exploitation of asphalt-covered surfaces for heating, measurement of the thermal conductivity of rocks and sediments, and performance monitoring of closed-loop and open-loop low enthalpy geothermal systems.

Download or read book Geothermal Direct Use Engineering and Design Guidebook written by Paul J. Lienau and published by . This book was released on 1989 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Downhole Heat Exchangers to the Rotorua Geothermal Field written by and published by . This book was released on 1990 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geothermal Energy written by Ingrid Stober and published by Springer Nature. This book was released on 2021-05-24 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The internal heat of the planet Earth represents an inexhaustible reservoir of thermal energy known as Geothermal Energy. The 2nd edition of the book covers the geologic and technical aspects of developing all forms of currently available systems using this "renewable" green energy. The book presents the distribution and transport of thermal energy in the Earth. Geothermal Energy is a base load energy available at all times independent of climate and weather. The text treats the efficiency of diverse shallow near surface installations and deep geothermal systems including hydrothermal and petrothermal techniques and power plants in volcanic high-enthalpy fields. The book also discusses environmental aspects of utilizing different forms of geothermal energy, including induced seismicity, noise pollution and gas release to the atmosphere. Chapters on hydraulic well tests, chemistry of deep hot water, scale formation and corrosion, development of geothermal probes, well drilling techniques and geophysical exploration complete the text. This book, for the first time, covers the full range of utilization of Geothermal Energy.

Download or read book Computational Modeling of Shallow Geothermal Systems written by Rafid Al-Khoury and published by CRC Press. This book was released on 2011-09-30 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Step-by-step Guide to Developing Innovative Computational Tools for Shallow Geothermal Systems Geothermal heat is a viable source of energy and its environmental impact in terms of CO2 emissions is significantly lower than conventional fossil fuels. Shallow geothermal systems are increasingly utilized for heating and cooling of buildings and greenhouses. However, their utilization is inconsistent with the enormous amount of energy available underneath the surface of the earth. Projects of this nature are not getting the public support they deserve because of the uncertainties associated with them, and this can primarily be attributed to the lack of appropriate computational tools necessary to carry out effective designs and analyses. For this energy field to have a better competitive position in the renewable energy market, it is vital that engineers acquire computational tools, which are accurate, versatile and efficient. This book aims at attaining such tools. This book addresses computational modeling of shallow geothermal systems in considerable detail, and provides researchers and developers in computational mechanics, geosciences, geology and geothermal engineering with the means to develop computational tools capable of modeling the complicated nature of heat flow in shallow geothermal systems in rather straightforward methodologies. Coupled conduction-convection models for heat flow in borehole heat exchangers and the surrounding soil mass are formulated and solved using analytical, semi-analytical and numerical methods. Background theories, enhanced by numerical examples, necessary for formulating the models and conducting the solutions are thoroughly addressed. The book emphasizes two main aspects: mathematical modeling and computational procedures. In geothermics, both aspects are considerably challenging because of the involved geometry and physical processes. However, they are highly stimulating and inspiring. A good combination of mathematical modeling and computational procedures can greatly reduce the computational efforts. This book thoroughly treats this issue and introduces step-by-step methodologies for developing innovative computational models, which are both rigorous and computationally efficient.

Download or read book Natural Convection Heat Transfer Models for Downhole Heat Exchanger Applications in Shallow Geothermal Systems written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Downhole heat exchangers are widely used at Klamath Falls, Oregon, for low temperature heating applications. The design of such systems leads to the consideration of several interesting problems of buoyancy driven heat transfer in enclosures. Two models are considered: (i) free convection in the uncased wellbore and (ii) thermosyphoning through and around the wellbore casing which is perforated at two or more depths. Preliminary temperature measurements in the uncased well indicate little bulk vertical flow in the upper part of the well and possible circulation in the lower part. An analytical model is formulated to investigate this problem, and the results are compared with the results of some previous investigations of natural convection in similar enclosures. An analytical model is developed for the thermosyphoning case to determine the limitations of energy extraction for downhole heat exchangers that rely on thermosyphoning as the major mechanism of circulation in the well. Theoretical results from the model are presented showing that observed energy extraction rates are possible as a result of thermosyphoning only.

Download or read book Geothermal Heat Pump and Heat Engine Systems written by Andrew D. Chiasson and published by John Wiley & Sons. This book was released on 2016-07-13 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique approach to the study of geothermal energy systems This book takes a unique, holistic approach to the interdisciplinary study of geothermal energy systems, combining low, medium, and high temperature applications into a logical order. The emphasis is on the concept that all geothermal projects contain common elements of a "thermal energy reservoir" that must be properly designed and managed. The book is organized into four sections that examine geothermal systems: energy utilization from resource and site characterization; energy harnessing; energy conversion (heat pumps, direct uses, and heat engines); and energy distribution and uses. Examples are provided to highlight fundamental concepts, in addition to more complex system design and simulation. Key features: Companion website containing software tools for application of fundamental principles and solutions to real-world problems. Balance of theory, fundamental principles, and practical application. Interdisciplinary treatment of the subject matter. Geothermal Heat Pump & Heat Engine Systems: Theory and Practice is a unique textbook for Energy Engineering and Mechanical Engineering students as well as practicing engineers who are involved with low-enthalpy geothermal energy systems.

Download or read book Geothermal Downhole Heat Exchanger Experimental Study of a Model Well DHE System written by Steffen Hailer and published by . This book was released on 1992 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermodynamic Optimization of Downhole Coaxial Heat Exchanger for Geothermal Applications written by Marc Domínguez Masalias and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 4 Introduction Currently fossil fuels - coal, oil and natural gas - provide about 85% of the world's total energy demand (including heating, transport, electricity generation and other uses). But, unfortunately, these types of energy resources have some negatives points. Fossil fuels are non-renewable resources because they take millions of years to form, and reserves are being depleted much faster than new ones are being formed. Another negative aspect is that burning such fossil fuels results in major environmental deterioration. Trying to restrain this rapidly growing environmental pollution, authorities have more and more frequently turned towards alternative energy sources (renewable), among which geothermal energy plays a significant role in some countries. Geothermal energy is the heat from the Earth. Resources of geothermal energy range from the shallow ground to hot water and hot rock found a few kilometres beneath the Earth's surface. The main inconvenience of this energy source is the hardly economical cost of drilling new wells. Therefore, attempts are being made to adapt existing boreholes, mostly drilled by the hydrocarbon industry, for geothermal utilization. In this context, deep borehole heat exchangers are an environmentally advantageous way for geothermal energy production. In this project, a downhole coaxial heat exchanger (DCHE)/heat pump (HP) system is simulated for shallow geothermal resources exploitation. The downhole, coaxial heat exchanger is designed for two different scenarios according to the working medium; one using water as a working fluid and the other one using air. The hot water produced will be used for space heating and domestic hot water production for a Central European home offering an attractive way to supply local housing with heat for direct use. All these systems need an electrical heat pump (HP) by which the low DCHE output temperature (rarely above 10 oC) can be lifted to the required level (35-50 oC). Heat extraction is established by closed-circuit fluid circulation. In this project, a thermodynamic design for determining some optimal parameters of the heat exchanger is presented. In this study, optimum diameter and thermal resistance for the insulated inner pipe is determined by using the second law of thermodynamics. The purpose of a thermodynamic design is to achieve a working system. A goal of the design is high efficiency; minimization of entropy generated (exergy destruction) is a way to achieve this.

Download or read book Geoenergy Modeling II written by Haibing Shao and published by Springer. This book was released on 2016-10-06 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to the numerical modeling of shallow geothermal systems. The utilization of shallow geothermal energy involves the integration of multiple Borehole Heat Exchangers (BHE) with Ground Source Heat Pump (GSHP) systems to provide heating and cooling. The modeling practices explained in this book can improve the efficiency of these increasingly common systems. The book begins by explaining the basic theory of heat transport processes in man-made as well as natural media. . These techniques are then applied to the simulation of borehole heat exchangers and their interaction with the surrounding soil. The numerical and analytical models are verified against analytical solutions and measured data from a Thermal Response Test, and finally, a real test site is analyzed through the model and discussed with regard to BHE and GSHP system design and optimization.