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Tuesday, May 5, 2020 | History

2 edition of Thermal fracture effects in geothermal energy extraction found in the catalog.

Thermal fracture effects in geothermal energy extraction

Ruth B Demuth

Thermal fracture effects in geothermal energy extraction

by Ruth B Demuth

  • 264 Want to read
  • 36 Currently reading

Published by [Dept. of Energy], Los Alamos Scientific Laboratory, for sale by the National Techbnical Information Service] in Los Alamos, N.M, [Springfield, Va .
Written in English

    Subjects:
  • Thermal stresses,
  • Hydraulic engineering,
  • Geothermal resources,
  • Fracture mechanics

  • Edition Notes

    StatementRuth B. Demuth, Francis H. Harlow
    SeriesLA ; 7963
    ContributionsHarlow, Francis Harvey, 1928- joint author, Los Alamos Scientific Laboratory
    The Physical Object
    Paginationiv, 148 p. :
    Number of Pages148
    ID Numbers
    Open LibraryOL14880441M

    Geophysical Research Letters; Global Biogeochemical Cycles; Journal of Advances in Modeling Earth Systems (JAMES). Methods for extracting geothermal energy from hot dry rocks by the creation of artificial reservoirs within the rock are considered. Problems of containing and recovering water injected into rock with high permeability and of circulating and heating water injected into rock of low permeability are pointed out, and possible solutions involving water-flooding and reservoir management techniques. Geothermal heat pumps are similar to ordinary heat pumps, but use the ground instead of outside air to provide heating, air conditioning and, in most cases, hot water. Because they use the earth's natural heat, they are among the most efficient and comfortable heating and cooling technologies currently available. Zhao et al. established a 3D THM coupling model of fractured media to simulate the extraction of HDR geothermal energy, by which the fracture area was discretely modeled by the Goodman joint element. Guo et al. [ 9 ] investigated the effects of aperture heterogeneity on flow pattern evolution in a single fracture in a low-permeability Cited by: 2.

    Thermal Fracturing of Geothermal Wells and the E ects of Borehole Orientation Kjetil M. D. Halsa, Inga Berreb aChristian Michelsen Research, P.O. Box , NO Bergen, Norway. bDepartment of Mathematics, University of Bergen, P.O. Box , NO Bergen, Norway. Abstract An enhanced geothermal system (EGS) expands the potential of geothermal energy by enabling the exploita-Cited by: 1. Long-term commercial development of geothermal resources for electric power production will depend on optimum heat extraction from such systems. Studies underway in the Stanford Geothermal Program since to improve the efficiency of energy extraction from geothermal resources involve a combination of physical and mathematical by: 2. To predict the fracture propagation system in geothermal reservoirs, numerical models should be able to show the temperature effects. This effect can cause small thermal expansions and generate thermal stresses. Also, thermal stress experiments have shown that cooling contraction produces a greater abundance of fractures in comparison with Author: Mohsen Bazargan, Pooyan Broumand, Agust Gudmundsson, Philip Meredith, Ali Rezaee, Soliman Mohammed. Reinjection is crucial for sustainable geothermal developments. In order to predict thermal performances due to cold-water injection, a method was developed to estimate effective fracture surface areas (i.e., heat transfer areas). Tracer response curves at production wells are analyzed to determine flow rates and pore volumes, and the fracture surface areas are optimized by short-term thermal Author: Anna Suzuki, Fuad Ikhwanda, Aoi Yamaguchi, Toshiyuki Hashida.

    thermal energy and use it to generate electricity or heat homes and businesses? We would have a domestic, clean, and nearly inexhaustible energy supply. Geothermal energy is one of the components of the National Energy Policy: “Reliable, Affordable, and Environmentally Sound Energy for America’s Future”, (pg. ). Our ancient ancestors knewFile Size: 1MB.   This paper describes the applications of the fractured continuum model to the different enhanced geothermal systems reservoir conditions. The capability of the fractured continuum model to generate fracture characteristics expected in enhanced geothermal systems reservoir environments are demonstrated for single and multiple sets of by: 6.   Geothermal exchange technology takes advantage of the thermal energy stored in the surface area of the Earth (first m). Up to 10–15 m deep approximately, ground heat is supplied by the sun and rain. From there the underground temperature increases about 3 °C per m depth, due to the internal thermal energy of the by: The country of Iceland resides on a highly unique geological foundation ideal for geothermal energy extraction. Bertani, R. ‘Geothermal power generation in the world update report.’ Proceedings World Geothermal Congress. Bali, Indonesia. International Geothermal Association. ().


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Thermal fracture effects in geothermal energy extraction by Ruth B Demuth Download PDF EPUB FB2

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

The principle is to use heat energy through heating of water to steam. Geothermal energy utilizes high temperatures below the earth’s crust. The hot steam or water heats a fluid that in turn expands to turn turbines that generate electricity. Basically, dry steam stations utilize the steam that.

Geothermal energy, form of energy conversion in which heat energy from within Earth is captured and harnessed for electrical power generation, space heating and cooling, and various direct uses. Learn Thermal fracture effects in geothermal energy extraction book the uses of geothermal energy and their history and.

Lanru Jing, Ove Stephansson, in Developments in Geotechnical Engineering, Groundwater Flow and Geothermal Energy Extraction. The fluid behavior of the fractured rock masses is of considerable interest in such areas as hydrocarbon recovery, nuclear waste disposal, geothermal energy extraction, underground storage and transport of fluids and contaminant transport.

@article{osti_, title = {Thermal stress cracking and the enhancement of heat extraction from fractured geothermal reservoirs}, author = {Murphy, H Thermal fracture effects in geothermal energy extraction book, abstractNote = {Given sufficient time, the extraction of heat from geothermal reservoirs formed by the hydraulic fracturing of competent rock will eventually result in the formation of thermal stress cracks in the reservoir.

The fluid flows through the fracture without the effect of penetrating into the matrix. Fractures with two different morphologies were designed for contrasting experiments: one was a smooth parallel-plate fracture and the other was a rough and tortuous fracture, as shown in Fig.

the former fracture, the Thermal fracture effects in geothermal energy extraction book granite specimen was cut averagely along the length of the core by:   The effect of spatial aperture variations on the thermal performance of discretely fractured geothermal reservoirs was investigated using finite element method solutions to the convective heat transfer in the fracture coupled with a boundary integral description of conductive heat transfer in the rock.

The dipolar flow was generated by a source of fluid volume at an injection well and a sink Cited by: This paper describes numerical simulations used to investigate the poro- and thermal- elastic effects of working fluid injection and thermal energy extraction on the properties of the fractures and rock matrix of a hypothetical EGS reservoir, using a novel simulation software FALCON (Podgorney et al., ), a finite element based simulator.

PDF | Engineered Geothermal Systems (EGS) are promising, but high-risk targets for baseline energy generation. Technology breakthrough is needed to | Find, read and cite all the research you. resources for their occurrence and for the heat extraction from the reservoirs; 1) heat, 2) fractures, 3) fluid.

Among them, the heat is the geothermal energy itself. It also enables the onset of natural convection by giving buoyancy resulting from the reduction of density caused by thermal expansion. It also helps the onset of natural. NUMERICAL STUDY ON HEAT EXTRACTION FROM SUPERCRITICAL GEOTHERMAL RESERVOIR Kimio Watanabe1, Yuichi Niibori2 and Toshiyuki Hashida2 1RichStone Ltd., Aomi, Koto-ku, TokyoJapan 2Graduate School of Tohoku University, Aramaki Aoba, Aoba-ku, SendaiJapan Key Words: supercritical, geothermal, heat extraction ABSTRACT Recent technology makes it.

Efficient extraction of geothermal energy from a dry well depends on the ability to establish a closed pressurized circuit of water through a large zone fractured in hot impermeable rock. Long‐term perpetuation of significant power extraction depends, in addition, on the ability to extend the initial fracture zone through the effects of Cited by: To examine the effects of coupled THM processes on working fluid injection and thermal energy extraction in EGS reservoirs, we have created a hypothetical EGS reservoir with several fracture densities and fracture orientations, and have simulated fluid flow, energy transport, and thermal-Cited by: 2.

Hydraulic fracturing has been and continues to be a major techno logical tool in oil and gas recovery, nuclear and other waste disposal, mining and particularly in-situ coal gasification, and, more recently, in geothermal heat recovery, particularly extracting heat from hot dry rock masses.

The understanding of the fracture process under the ac tion of pressurized fluid at various temperatures. solutions in physical space of temperature changes for the EGS system.

Numerical results confirm that thermal energy extraction rate and the lifetime of fracture reservoirs can be optimized. The results also demonstrate that the effect of the fluid viscosity on the output temperature of the EGS can be Size: 1MB.

The Laugaland geothermal system in N-Iceland is hosted by low-permeability fractured basalt and its productivity is limited by insufficient recharge, even though substantial thermal energy is in. Geothermal energy is normally generated by pulling preexisting hot water and steam from the ground.

But here, AltaRock has proposed a way to generate the same clean energy from a dry hole in. Geothermal energy is thermal energy generated and stored in the Earth.

Thermal energy is the energy that determines the temperature of matter. The geothermal energy of the Earth's crust originates from the original formation of the planet and from radioactive decay of materials (in currently uncertain but possibly roughly equal proportions).

The geothermal gradient, which is the difference in. Geothermal energy is generated in over 20 countries. The United States is the world’s largest producer, and the largest geothermal development in the world is The Geysers north of San Francisco.

In an environment of increasing demand for renewable energy resources and derivatives, geothermal energy is one of the resources toward which industry is turning.

"Geothermal" means heat from the Earth. As with all non-fossil fuels alternatives, geothermal energy has pros and cons. the heat extraction pdf circulating water in a fracture embedded in a geothermal reservoir.

Ghassemi and Kumar [10] examined the changes in fracture aperture and fluid pressure caused by the individual and combined influences of thermal stress and chemical processes resulting from heat extraction from subsurface rocks.

Heat storage capabilities of deep sedimentary geothermal download pdf are evaluated through numerical model simulations. We combine storage with heat extraction in a doublet well system when storage phases are restricted to summer months.

The effects of stored volume and annual repetition on energy recovery are investigated. Recovery factors are evaluated for several different Cited by: 6.Heat extraction of novel underground well pattern ebook for geothermal energy exploitation Peixue Jiang a, ebook, Xiaolu Li a, b, Ruina Xu a, b, *, Fuzhen Zhang a, b a Key Laboratory of CO 2 Utilization and ReductionTechnology of Beijing, Department of Thermal Engineering, Tsinghua University, BeijingPR China b Key Laboratory for Thermal Science and Power Engineering of Ministry of.