The Experts below are selected from a list of 3408 Experts worldwide ranked by ideXlab platform
Isao Matsunaga - One of the best experts on this subject based on the ideXlab platform.
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temperature dependent scale precipitation in the hijiori Hot Dry Rock system japan
Geothermics, 2008Co-Authors: Norio Yanagisawa, Isao Matsunaga, Hajime Sugita, Masatake Sato, Takashi OkabeAbstract:Mineral scales were formed in wells and surface installations during a 2-year circulation test performed at the Hijiori Hot Dry Rock (HDR) site, Yamagata, Japan. Anhydrite deposited in the deeper parts of the production wells, while silica and calcium carbonate precipitated at the surface, downstream of the wellhead, in amounts that depended on the temperature and chemical composition of the produced fluid. In well HDR-2a, closer to the injector, most of the scale was calcium carbonate; in HDR-3, further away from the injection well, there was slight precipitation of amorphous silica. As fluid circulation progressed and temperature decreased, scaling in the flow line of well HDR-2a changed from amorphous silica to calcium carbonate.
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Development of Hot Dry Rock Technology at Hijiori Test Site: Program for a Long-Term Circulation Test
Energy Sources, 1998Co-Authors: Norio Tenma, Shun-ichi Iwakiri, Isao MatsunagaAbstract:Abstract Since 1985, the New Energy and Industrial Technology Development Organization (NEDO) has continued the development of Hot Dry Rock power generation in Hijiori Hot Dry Rock test site, Yamagata prefecture, Japan, as part of the Sunshine Project and succeeding New Sunshine Project sponsored by the Agency of Industrial Science and Technology (AIST), a branch of the Ministry of International Trade and Industry (MITI). The objective of this project is to identify the feasibility of a Hot Dry Rock power generation system in Japan. Thus, the research and development being undertaken at Hijiori HDR test site is aiming to establish Hot Rock drilling technology, logging borehole technology for evaluating the state of the Rock around the well, hydraulic fracturing technology for creating artificial fractures in Rock, fracture mapping technology for surveying the reservoir area, and. reservoir evaluation technology for predicting reservoir longevity.
Donald W. Brown - One of the best experts on this subject based on the ideXlab platform.
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The Enormous Potential for Hot Dry Rock Geothermal Energy
Mining the Earth's Heat: Hot Dry Rock Geothermal Energy, 2012Co-Authors: Donald W. Brown, David V. Duchane, Grant Heiken, Vivi Thomas HriscuAbstract:The concept of Hot Dry Rock (HDR) geothermal energy originated at the Los Alamos National Laboratory. In 1970 it was proposed as a method for exploiting the heat contained in those vast regions of the earth’s crust that contain no fluids in place—by far more widespread than natural geothermal resources (HDR represents over 99% of the total U. S. geothermal resource). Although often confused with the small, already mostly commercialized hydrothermal resource, HDR geothermal energy is completely different from hydrothermal energy.
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Session: Hot Dry Rock
1992Co-Authors: George P. Tennyson, David V. Duchane, Raymond F. Ponden, Donald W. BrownAbstract:This session at the Geothermal Energy Program Review X: Geothermal Energy and the Utility Market consisted of four presentations: ''Hot Dry Rock - Summary'' by George P. Tennyson, Jr.; ''HDR Opportunities and Challenges Beyond the Long Term Flow Test'' by David V. Duchane; ''Start-Up Operations at the Fenton Hill HDR Pilot Plant'' by Raymond F. Ponden; and ''Update on the Long-Term Flow Testing Program'' by Donald W. Brown.
Jian Bin Zhao - One of the best experts on this subject based on the ideXlab platform.
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Research on Water Temperature Change of Hot Dry Rock Fracture Storage Layer in Shenyang
Applied Mechanics and Materials, 2014Co-Authors: Jian Bin Zhao, Hai Dong Song, Zheng ZhangAbstract:Hot Dry Rock(HDR) provides heat through fracture storage layer. The purpose of research on water temperature change of Hot Dry Rock fracture is to study that whether heat energy can satisfy five months winter heating or not. Research method is establishing model of Hot Dry Rock fractured storage layer by means of numerical simulation software FLUENT according to the Rock physical properties in Shenyang region. The depth of drilling is 4000m and the water flow rate is 1cm/s. Research principle is high temperature underground Rock transfer heat to medium water in the fracture by coupling. Conclude water temperature change equation every two weeks. The results of the study is that fracture water temperature distribution can be approximated taken as linear distribution. According to the slope K, we can conclude water temperature change formula(3.10), and we can use it to infer fracture water temperature.
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Research of Hot Dry Rock on Fracture Temperature Distribution of Storage Layer in Shenyang
Applied Mechanics and Materials, 2012Co-Authors: Jian Bin Zhao, Kun Zhao, Xiao Yan Feng, Yan Yan YanAbstract:Hot Dry Rock is more and more appreciated as a kind of newly resource, which is up to the low carbon idea. Storage layer is the heat origin in heating system, is the exchange place for Hot Dry Rock and water. So the temperature distribution tendency of the happening of storage layer and the heat exchange, the prediction for the service life of storage layer will affect the resource utilization and development. The paper uses one - dimensional simulate heat conduction formula based on FenDun mountain Hot Dry Rock research, combined with deep Rock parameters and heat conduction parameters of Shenyang to determine that using heat conducting research in storage layer of Hot Dry Rock can simplify reservoir parameters for calculation. And then to get the temperature distribution discipline of storage layer of Hot Dry Rock when Hot exchanged.
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The Key Technical Analysis on the Hot Dry Rock in Northeast Cold in China
Applied Mechanics and Materials, 2011Co-Authors: Jian Bin Zhao, Xiao Yan Feng, Ke Qi Yan, Hui GuoAbstract:Northeast heat supply is an eternal demand, it would cost tens of thousand of moneys for heat supply, on the other hand, the resource of coal and fossil fuels is non-renewable source of energy, in the future it will be consumed, so it is still a serious problem to solve the winter heat supply. At the same time, the Hot Dry Rock has three essential factors including a huge number, renewable and not polluting the environment, which will open up new ways on heat supply in cold area. Based on its advantages the paper will design a heated system more effective than the technology of shallow ground source heat pump, meanwhile analysis the key technology during exploiting the Hot Dry Rock progress, then the thermal conductivity of Rock under high temperature and high pressure and the heat transfer ability between Rock and water as well as pipe material and insulation technology, all of which will realize the key technology about the Dry-heat Rock heating. In conclusion, if the key technology on heated system would be settled, it will bring breakthrough about using the Hot Dry Rock on heated supply in cold areas.
Takashi Okabe - One of the best experts on this subject based on the ideXlab platform.
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temperature dependent scale precipitation in the hijiori Hot Dry Rock system japan
Geothermics, 2008Co-Authors: Norio Yanagisawa, Isao Matsunaga, Hajime Sugita, Masatake Sato, Takashi OkabeAbstract:Mineral scales were formed in wells and surface installations during a 2-year circulation test performed at the Hijiori Hot Dry Rock (HDR) site, Yamagata, Japan. Anhydrite deposited in the deeper parts of the production wells, while silica and calcium carbonate precipitated at the surface, downstream of the wellhead, in amounts that depended on the temperature and chemical composition of the produced fluid. In well HDR-2a, closer to the injector, most of the scale was calcium carbonate; in HDR-3, further away from the injection well, there was slight precipitation of amorphous silica. As fluid circulation progressed and temperature decreased, scaling in the flow line of well HDR-2a changed from amorphous silica to calcium carbonate.
George P. Tennyson - One of the best experts on this subject based on the ideXlab platform.
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Hot Dry Rock - Summary
1992Co-Authors: George P. TennysonAbstract:Hot Dry Rock adds a new flexibility to the utilization of geothermal energy. Almost always the approach has been to limit that utilization to places where there is a natural source of water associated with a source of heat. Actually, the result was that steam was mined. Clearly there are much larger heat resources available which lack natural water to transport that energy to the surface. Also, as is found in hydrothermal fields being mined for steam, the water supply finally gets used up. There is a strong motive in the existing capital investment to revitalize those resources. Techniques for introducing, recovering and utilizing the water necessary to recover the heat from below the surface of the earth is the subject of this session. Implicit in that utilization is the ability to forecast with reasonable accuracy the busbar cost of that energy to the utility industry. The added element of supplying the water introduces costs which must be recovered while still supplying energy which is competitive. Hot Dry Rock technology can supply energy. That has been proved long since. The basic barrier to its use by the utility industry has been and remains proof to the financial interests that themore » long term cost is competitive enough to warrant investment in a technology that is new to utility on-grid operations. As the opening speaker for this session states, the test that is underway will ''simulate the operations of a commercial facility in some ways, but it will not show that energy from HDR can be produced at a variety of locations with different geological settings''. Further, the Fenton Hill system is a research facility not designed for commercial production purposes, but it can give indications of how the system must be changed to provide economic HDR operations. And so it is that we must look beyond the long term flow test, at the opportunities and challenges. Proving that the huge HDR resources can be accessed on a worldwide scale must involve the construction of additional sites, preferably to the specifications of the now Federal geothermal community. These facilities will have to be engineered to produce and market energy at competitive prices. At the same time, we must not rest on our technological laurels, though they be many. Design and operational techniques have been conceived which could lead to improved economics and operations for HDR. These must be pursued and where merit is found, vigorously pursued. Accelerated research and development ought to include revolutionary drilling techniques, reservoir interrogation, and system modeling to assure the competitiveness and geographical diversity of applications of HDR. Much of this work will be applicable to the geothermal industry in general. More advanced research ought to include such innovations as the utilization of other operating fluids. Supercritical carbon dioxide and the ammonia/water (Kalina) cycle have been mentioned. But even as the near and more distant outlook is examined, today's work was reported in the HDR session. The start-up operations for the current test series at the Fenton Hill HDR Pilot Plant were described. The surface plant is complete and initial operations have begun. While some minor modifications to the system have been required, nothing of consequence has been found to impede operations. Reliability, together with the flexibility and control required for a research system were shown in the system design, and demonstrated by the preliminary results of the plant operations and equipment performance. Fundamental to the overall success of the HDR energy resource utilization is the ability to optimize the pressure/flow impedance/time relationships as the reservoir is worked. Significant new insights are still being developed out of the data which will substantially affect the operational techniques applied to new systems. However, again, these will have to be proved to be general and not solely specific to the Fenton Hill site. Nevertheless, high efficiency use of the reservoir without unintended reservoir growth or water retention or life degradation depends on detailed Understanding of the hydraulic behavior of this reservoir and the degree to which that understanding applies to HDR reservoirs in general. In summary, it would seem that the nation and its utility system has a vital, practicable, and economical source of energy on the brink of availability. The research and development needed to assure the optimization of that resource application continues.« less
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Session: Hot Dry Rock
1992Co-Authors: George P. Tennyson, David V. Duchane, Raymond F. Ponden, Donald W. BrownAbstract:This session at the Geothermal Energy Program Review X: Geothermal Energy and the Utility Market consisted of four presentations: ''Hot Dry Rock - Summary'' by George P. Tennyson, Jr.; ''HDR Opportunities and Challenges Beyond the Long Term Flow Test'' by David V. Duchane; ''Start-Up Operations at the Fenton Hill HDR Pilot Plant'' by Raymond F. Ponden; and ''Update on the Long-Term Flow Testing Program'' by Donald W. Brown.