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1

Reservoir Investigations on the Hot Dry Rock Geothermal System...  

Open Energy Info (EERE)

Investigations on the Hot Dry Rock Geothermal System, Fenton Hill, New Mexico- Tracer Test Results Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference...

2

Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ Geochemical Behavior Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ Geochemical Behavior Details Activities (5) Areas (2) Regions (0) Abstract: Two hot dry rock (HDR) geothermal energy reservoirs have been created by hydraulic fracturing of Precambrian granitic rock between two wells on the west flank of the Valles Caldera in the Jemez Mountains of northern New Mexico. Heat is extracted by injecting water into one well,

3

AltaRock Energy Announces Successful Multiple-Zone Stimulation of Well at the Newberry Enhanced Geothermal Systems Demonstration  

Energy.gov (U.S. Department of Energy (DOE))

AltaRock Energy today announced that it has created multiple stimulated zones from a single wellbore at the Newberry Enhanced Geothermal System (EGS) Demonstration site.

4

A History Of Hot Dry Rock Geothermal Energy Systems | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » A History Of Hot Dry Rock Geothermal Energy Systems Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A History Of Hot Dry Rock Geothermal Energy Systems Details Activities (1) Areas (1) Regions (0) Abstract: This is a short history, so far as it can now be assembled, of early speculations and observations concerning the existence and origin of natural heat in the earth's crust; of some of the many methods proposed to extract and use it; and of recent investigations designed to develop and demonstrate such methods. It is probably only the preface to a much longer

5

Numerical studies of fluid-rock interactions in Enhanced Geothermal Systems (EGS) with CO2 as working fluid  

E-Print Network (OSTI)

2006), The Future of Geothermal Energy Impact of Enhanced2000), A Hot Dry Rock Geothermal Energy Concept Utilizing

Xu, Tianfu; Pruess, Karsten; Apps, John

2008-01-01T23:59:59.000Z

6

Numerical studies of fluid-rock interactions in Enhanced Geothermal Systems (EGS) with CO2 as working fluid  

E-Print Network (OSTI)

2006), The Future of Geothermal Energy Impact of Enhanced2000), A Hot Dry Rock Geothermal Energy Concept UtilizingEnergy has broadly defined Enhanced (or Engineered) Geothermal

Xu, Tianfu; Pruess, Karsten; Apps, John

2008-01-01T23:59:59.000Z

7

Rock Mechanics and Enhanced Geothermal Systems: A DOE-sponsored Workshop to Explore Research Needs  

SciTech Connect

This workshop on rock mechanics and enhanced geothermal systems (EGS) was held in Cambridge, Mass., on June 20-21 2003, before the Soil and Rock America 2003 International Conference at MIT. Its purpose was to bring together experts in the field of rock mechanics and geothermal systems to encourage innovative thinking, explore new ideas, and identify research needs in the areas of rock mechanics and rock engineering applied to enhanced geothermal systems. The agenda is shown in Appendix A. The workshop included experts in the fields of rock mechanics and engineering, geological engineering, geophysics, drilling, the geothermal energy production from industry, universities and government agencies, and laboratories. The list of participants is shown is Appendix B. The first day consisted of formal presentations. These are summarized in Chapter 1 of the report. By the end of the first day, two broad topic areas were defined: reservoir characterization and reservoir performance. Working groups were formed for each topic. They met and reported in plenary on the second day. The working group summaries are described in Chapter 2. The final session of the workshop was devoted to reaching consensus recommendations. These recommendations are given in Chapter 3. That objective was achieved. All the working group recommendations were considered and, in order to arrive at a practical research agenda usable by the workshop sponsors, workshop recommendations were reduced to a total of seven topics. These topics were divided in three priority groups, as follows. First-priority research topics (2): {sm_bullet} Define the pre-existing and time-dependent geometry and physical characteristics of the reservoir and its fracture network. That includes the identification of hydraulically controlling fractures. {sm_bullet} Characterize the physical and chemical processes affecting the reservoir geophysical parameters and influencing the transport properties of fractures. Incorporate those processes in reservoir simulators. Second-priority research topics (4): {sm_bullet} Implement and proof-test enhanced fracture detection geophysical methods, such as 3-D surface seismics, borehole seismics, and imaging using earthquake data. {sm_bullet} Implement and proof-test enhanced stress measurement techniques, such as borehole breakout analysis, tilt-meters, and earthquake focal mechanism analysis. {sm_bullet} Implement and proof-test high-temperature down-hole tools for short-term and long-term diagnostics, such as borehole imaging, geophone arrays, packers, and electrical tools.

Francois Heuze; Peter Smeallie; Derek Elsworth; Joel L. Renner

2003-10-01T23:59:59.000Z

8

Issues surrounding fracturing of geothermal systems - predicting thermal conductivity of reservoir rocks and evaluating performance of fracture proppants.  

E-Print Network (OSTI)

??Traditional geothermal systems have been limited to geologic systems in which elevated temperatures, abundant water, and high porosity and permeability are found. Engineered geothermal systems (more)

Brinton, Daniel

2011-01-01T23:59:59.000Z

9

Isotopic Analysis- Rock At Coso Geothermal Area (1984) | Open Energy  

Open Energy Info (EERE)

Analysis- Rock At Coso Geothermal Area (1984) Analysis- Rock At Coso Geothermal Area (1984) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis- Rock At Coso Geothermal Area (1984) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Isotopic Analysis- Rock Activity Date 1984 Usefulness not indicated DOE-funding Unknown Exploration Basis To analyze evidence for crustal interaction and compositional zonation in the source regions of Pleistocene basaltic and rhyolitic magmas of the Coso volcanic field Notes The isotopic compositions of Pb and Sr in Pleistocene basalt, high-silica rhyolite, and andesitic inclusions in rhyolite of the Coso volcanic field indicate that these rocks were derived from different levels of compositionally zoned magmatic systems. The two earliest rhyolites probably

10

Eagle Rock Geothermal Facility | Open Energy Information  

Open Energy Info (EERE)

Eagle Rock Geothermal Facility Eagle Rock Geothermal Facility Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Eagle Rock Geothermal Facility General Information Name Eagle Rock Geothermal Facility Facility Eagle Rock Sector Geothermal energy Location Information Location The Geysers, California Coordinates 38.826770222484°, -122.80002593994° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.826770222484,"lon":-122.80002593994,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

11

Lithology and alteration mineralogy of reservoir rocks at Coso Geothermal  

Open Energy Info (EERE)

Lithology and alteration mineralogy of reservoir rocks at Coso Geothermal Lithology and alteration mineralogy of reservoir rocks at Coso Geothermal Area, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Lithology and alteration mineralogy of reservoir rocks at Coso Geothermal Area, California Details Activities (1) Areas (1) Regions (0) Abstract: Coso is one of several high-temperature geothermal systems associated with recent volcanic activity in the Basin and Range province. Chemical and fluid inclusion data demonstrate that production is from a narrow, asymmetric plume of thermal water that originates from a deep reservoir to the south and then flows laterally to the north. Geologic controls on the geometry of the upwelling plume were investigated using petrographic and analytical analyses of reservoir rock and vein material.

12

Magnetic susceptibility of volcanic rocks in geothermal areas: application potential in geothermal exploration studies for identification of rocks and zones of hydrothermal alteration  

Science Journals Connector (OSTI)

Magnetic susceptibility and petrographic studies of drilled rock cuttings from two geothermal wells (Az-26 and Az-49) of the important electricity-generating geothermal system, Los Azufres, Mexico, were carried o...

Kailasa Pandarinath; Rajasekhariah Shankar

2014-07-01T23:59:59.000Z

13

Hot Dry Rock Geothermal Energy Development in the USA David Duchane and Donald Brown  

E-Print Network (OSTI)

1 Hot Dry Rock Geothermal Energy Development in the USA by David Duchane and Donald Brown Los of the world's store of geothermal energy. The real potential for growth in the use of geothermal energy lies system. Water is circulated around a closed loop to extract thermal energy from an engineered geothermal

14

Hot-dry-rock geothermal resource 1980  

SciTech Connect

The work performed on hot dry rock (HDR) geothermal resource evaluation, site characterization, and geophysical exploration techniques is summarized. The work was done by region (Far West, Pacific Northwest, Southwest, Rocky Mountain States, Midcontinent, and Eastern) and limited to the conterminous US.

Heiken, G.; Goff, F.; Cremer, G. (ed.)

1982-04-01T23:59:59.000Z

15

Role of Fluid Pressure in the Production Behavior of Enhanced Geothermal Systems with CO2 as Working Fluid  

E-Print Network (OSTI)

Brown, D. A Hot Dry Rock Geothermal Energy Concept Utilizingand Renewable Energy, Office of Geothermal Technologies, ofenhanced geothermal systems (EGS), predicting larger energy

Pruess, Karsten

2008-01-01T23:59:59.000Z

16

Enhanced Geothermal Systems (EGS) - the Future of Geothermal...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Enhanced Geothermal Systems (EGS) - the Future of Geothermal Energy Enhanced Geothermal Systems (EGS) - the Future of Geothermal Energy October 28, 2013 - 12:00am Addthis While the...

17

National Geothermal Data System (NGDS) Geothermal Data Domain...  

Open Energy Info (EERE)

Data System (NGDS) Geothermal Data Domain: Assessment of Geothermal Community Data Needs Abstract To satisfy the critical need for geothermal data to advance geothermal energy as...

18

Enhanced Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

Below are the project presentations and respective peer review results for Engineered Geothermal Systems, Low Temperature and Exploration Demonstration Projects.

19

Hot Dry Rock Geothermal Energy In The Jemez Volcanic Field, New Mexico |  

Open Energy Info (EERE)

Rock Geothermal Energy In The Jemez Volcanic Field, New Mexico Rock Geothermal Energy In The Jemez Volcanic Field, New Mexico Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Hot Dry Rock Geothermal Energy In The Jemez Volcanic Field, New Mexico Details Activities (2) Areas (1) Regions (0) Abstract: Large, young calderas possess immense geothermal potential due to the size of shallow magma bodies that underlie them. Through the example of the Valles and Toledo calderas, New Mexico, and older, more deeply eroded and exposed calderas, it is possible to reconstruct a general view of geothermal environments associated with such magmatic systems. Although a zone of anomalous heat flow extends well beyond caldera margins, high- to moderate-temperature hydrothermal systems appear to be restricted to zones

20

Isotopic Analysis- Rock At Coso Geothermal Area (1997) | Open Energy  

Open Energy Info (EERE)

Rock At Coso Geothermal Area (1997) Rock At Coso Geothermal Area (1997) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis- Rock At Coso Geothermal Area (1997) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Isotopic Analysis- Rock Activity Date 1997 Usefulness useful DOE-funding Unknown Exploration Basis Determine a major lithospheric boundary Notes Sr and Nd isotope ratios of Miocene-Recent basalts in eastern California, when screened for crustal contamination, vary dramatically and indicate the presence of a major lithospheric boundary that is not obvious from surface geology. Isotope ratios from the Coso field form a bull's-eye pattern with very low 87Sr/86Sr (0.7033) centered just south of the geothermal area. The

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Rock Sampling At Coso Geothermal Area (1995) | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Rock Sampling At Coso Geothermal Area (1995) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Rock Sampling At Coso Geothermal Area (1995) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Rock Sampling Activity Date 1995 Usefulness not indicated DOE-funding Unknown Notes Geologic controls on the geometry of the upwelling plume were investigated using petrographic and analytical analyses of reservoir rock and vein material. References Lutz, S.J.; Moore, J.N. ; Copp, J.F. (1 June 1995) Lithology and alteration mineralogy of reservoir rocks at Coso Geothermal Area,

22

Engineered Geothermal Systems.  

E-Print Network (OSTI)

?? Different concepts for Enhanced Geothermal Systems (EGS) are presented and evaluated according to their potential for medium to large scale power production in Norwegian (more)

Drange, Lars Anders

2011-01-01T23:59:59.000Z

23

Geothermal: Sponsored by OSTI -- NATIONAL GEOTHERMAL DATA SYSTEM...  

Office of Scientific and Technical Information (OSTI)

SYSTEM (NGDS) GEOTHERMAL DATA DOMAIN: ASSESSMENT OF GEOTHERMAL COMMUNITY DATA NEEDS Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On Home...

24

Microfractures in rocks from two geothermal areas | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Microfractures in rocks from two geothermal areas Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Microfractures in rocks from two geothermal areas Details Activities (2) Areas (2) Regions (0) Abstract: Core samples from the Dunes, California, and Raft River, Idaho, geothermal areas show diagenesis superimposed on episodic fracturing and fracture sealing. The minerals that fill fractures show significant temporal variations. Sealed fractures can act as barriers to fluid flow. Sealed fractures often mark boundaries between regions of significantly

25

Sedimentary Geothermal Systems | Open Energy Information  

Open Energy Info (EERE)

Sedimentary Geothermal Systems Sedimentary Geothermal Systems Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Geopressured Geothermal Systems Geothermal Technologies There are many types of Geothermal Technologies that take advantage of the earth's heat: Hydrothermal Systems Enhanced Geothermal Systems (EGS) Sedimentary Geothermal Systems Co-Produced Geothermal Systems Geothermal Direct Use Ground Source Heat Pumps Sedimentary Geothermal Links Related documents and websites Estimate of the Geothermal Energy Resource in the Major Sedimentary Basins in the United States Recoverable Resource Estimate of Identified Onshore Geopressured Geothermal Energy in Texas and Louisiana EGS Schematic.jpg ] Dictionary.png Sedimentary Geothermal Systems: Sedimentary Geothermal Systems produce electricity from medium temperature,

26

Coincident P and Sh reflections from basement rocks at Coso geothermal  

Open Energy Info (EERE)

Coincident P and Sh reflections from basement rocks at Coso geothermal Coincident P and Sh reflections from basement rocks at Coso geothermal field Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Coincident P and Sh reflections from basement rocks at Coso geothermal field Details Activities (2) Areas (1) Regions (0) Abstract: In mid-1989 the authors designed and collected four seismic reflection/refraction profiles that addressed the crustal structure of the Coso geothermal field. The two main east-west and north-south profiles crossed at the southeasternmost base of Sugar Loaf Mountain. Both in-line and cross-line Vibroseis and explosion data were recorded on each of these approximately 12-mi lines. This was accomplished with the simultaneous operation of two 1024-channel sign bit recording systems while four

27

Seismic Technology Adapted to Analyzing and Developing Geothermal Systems Below Surface-Exposed High-Velocity Rocks  

Energy.gov (U.S. Department of Energy (DOE))

Improved seismic imaging of geology across high-velocity Earth surfaces will allow more rigorous evaluation of geothermal prospects beneath volcanic outcrops. Seismic-based quantification of fracture orientation and intensity will result in optimal positioning of geothermal wells.

28

Fluid-Rock Interaction in Geothermal Energy Recovery  

Science Journals Connector (OSTI)

Reaction of aqueous fluids with minerals of geothermal energy reservoir rocks produces both secondary solid phases ... for these effects. Heat production from chemical energy is possible in relevant amounts, but ...

E. Althaus

1980-01-01T23:59:59.000Z

29

Enhanced Geothermal Systems Subprogram Overview  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Geothermal Systems Subprogram Overview May 18, 2010 Geothermal Technologies Program Peer Review Crystal City, VA Energy Efficiency & Renewable Energy eere.energy.gov Technology...

30

Residential Geothermal Systems Credit  

Energy.gov (U.S. Department of Energy (DOE))

A resident individual taxpayer of Montana who installs a geothermal heating or cooling system in their principal dwelling can claim a tax credit based on the installation costs of the system, not...

31

Black Rock III Geothermal Project | Open Energy Information  

Open Energy Info (EERE)

Black Rock III Geothermal Project Black Rock III Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Black Rock III Geothermal Project Project Location Information Coordinates The following coordinate was not recognized: 33°19'59" N, 115°50'3 W.The following coordinate was not recognized: 33°19'59" N, 115°50'3 W. Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[]}

32

OIT geothermal system improvements  

SciTech Connect

The Oregon Institute of Technology campus has been heated by the direct use of geothermal fluids since 1964. The 11 building campus uses geothermal energy for space heating/cooling, domestic water heating, the swimming pool and sidewalk snow melt. The hydronic system was designed to use the geothermal fluids directly in heating units. In the 1970s, problems were experienced with the design and operation of the well pumps, buried piping and heating equipment. Beginning in the early 1980`s, many improvements were made to the system due to equipment performance problems and resource management requirements. This paper discusses those improvements that included the distribution system, cooling, well pumps, cascading of geothermal fluids, installation of isolation plate heat exchangers in each building and drilling of two injection wells. Plans for future improvements include better controls to manage energy use and data monitoring systems for individual buildings, and instrumentation to monitor well pump performance.

Lienau, P.J.

1996-12-31T23:59:59.000Z

33

Induced seismicity associated with enhanced geothermal system  

E-Print Network (OSTI)

and Renewable Energy, Geothermal Technologies Program of theHill hot dry rock geothermal energy site, New Mexico. Int J.1. In: Geopressured-Geothermal Energy, 105, Proc. 5th U.S.

Majer, Ernest L.

2006-01-01T23:59:59.000Z

34

Induced seismicity associated with enhanced geothermal system  

E-Print Network (OSTI)

Hill hot dry rock geothermal energy site, New Mexico. Int J.No. 1. In: Geopressured-Geothermal Energy, 105, Proc. 5thCoast Geopressured-Geothermal Energy Conf. (Bebout, D.G. ,

Majer, Ernest L.

2006-01-01T23:59:59.000Z

35

Neutron imaging for geothermal energy systems  

SciTech Connect

Geothermal systems extract heat energy from the interior of the earth using a working fluid, typically water. Three components are required for a commercially viable geothermal system: heat, fluid, and permeability. Current commercial electricity production using geothermal energy occurs where the three main components exist naturally. These are called hydrothermal systems. In the US, there is an estimated 30 GW of base load electrical power potential for hydrothermal sites. Next generation geothermal systems, named Enhanced Geothermal Systems (EGS), have an estimated potential of 4500 GW. EGSs lack in-situ fluid, permeability or both. As such, the heat exchange system must be developed or engineered within the rock. The envisioned method for producing permeability in the EGS reservoir is hydraulic fracturing, which is rarely practiced in the geothermal industry, and not well understood for the rocks typically present in geothermal reservoirs. High costs associated with trial and error learning in the field have led to an effort to characterize fluid flow and fracturing mechanisms in the laboratory to better understand how to design and manage EGS reservoirs. Neutron radiography has been investigated for potential use in this characterization. An environmental chamber has been developed that is suitable for reproduction of EGS pressures and temperatures and has been tested for both flow and precipitations studies with success for air/liquid interface imaging and 3D reconstruction of precipitation within the core.

Bingham, Philip R [ORNL; Anovitz, Lawrence {Larry} M [ORNL; Polsky, Yarom [ORNL

2013-01-01T23:59:59.000Z

36

Enhanced Geothermal Systems (EGS) | Open Energy Information  

Open Energy Info (EERE)

Enhanced Geothermal Systems (EGS) Enhanced Geothermal Systems (EGS) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Enhanced Geothermal Systems (EGS) Geothermal Technologies There are many types of Geothermal Technologies that take advantage of the earth's heat: Hydrothermal Systems Enhanced Geothermal Systems (EGS) Sedimentary Geothermal Systems Co-Produced Geothermal Systems Geothermal Direct Use Ground Source Heat Pumps EGS Links Related documents and websites DOE EGS Technical Roadmap DOE EGS Systems Demonstration Projects How EGS Works (Animation) EGS Development (Animation) EGS Schematic.jpg ] Dictionary.png Enhanced Geothermal Systems: Enhanced Geothermal Systems (EGS) are human engineered hydrothermal reservoirs developed for commercial use as an alternative to naturally

37

Enhanced Geothermal Systems | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

About the Geothermal Technologies Office Enhanced Geothermal Systems Enhanced Geothermal Systems The Newberry Volcano near Bend, Oregon is one of five active Energy Department...

38

National Geothermal Data System (NGDS) Geothermal Data Domain: Assessment  

Open Energy Info (EERE)

National Geothermal Data System (NGDS) Geothermal Data Domain: Assessment National Geothermal Data System (NGDS) Geothermal Data Domain: Assessment of Geothermal Community Data Needs Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: National Geothermal Data System (NGDS) Geothermal Data Domain: Assessment of Geothermal Community Data Needs Abstract To satisfy the critical need for geothermal data to advance geothermal energy as a viable renewable energy contender, the U.S. Department of Energy is in-vesting in the development of the National Geothermal Data System (NGDS). This paper outlines efforts among geothermal data providers nationwide to sup-ply cutting edge geoinformatics. NGDS geothermal data acquisition, delivery, and methodology are dis-cussed. In particular, this paper addresses the various types of data required to effectively assess

39

American Geothermal Systems | Open Energy Information  

Open Energy Info (EERE)

Geothermal Systems Place: Austin, Texas Sector: Geothermal energy Product: Installer of geothermal heating and cooling technologies, also has a patented water to air heat pump...

40

BOREHOLE PRECONDITIONING OF GEOTHERMAL WELLS FOR ENHANCED GEOTHERMAL SYSTEM  

Open Energy Info (EERE)

BOREHOLE PRECONDITIONING OF GEOTHERMAL WELLS FOR ENHANCED GEOTHERMAL SYSTEM BOREHOLE PRECONDITIONING OF GEOTHERMAL WELLS FOR ENHANCED GEOTHERMAL SYSTEM RESERVOIR DEVELOPMENT Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: BOREHOLE PRECONDITIONING OF GEOTHERMAL WELLS FOR ENHANCED GEOTHERMAL SYSTEM RESERVOIR DEVELOPMENT Details Activities (1) Areas (1) Regions (0) Abstract: Thermal stimulation can be utilized to precondition a well to optimize fracturing and production during Enhanced Geothermal System (EGS) reservoir development. A finite element model was developed for the fully coupled processes consisting of: thermoporoelastic deformation, hydraulic conduction, thermal osmosis, heat conduction, pressure thermal effect, and the interconvertibility of mechanical and thermal energy. The model has

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Geothermal: Sponsored by OSTI -- National Geothermal Data System...  

Office of Scientific and Technical Information (OSTI)

System (NGDS) Geothermal Data: Community Requirements and Information Engineering Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On Home...

42

Geothermal: Sponsored by OSTI -- National Geothermal Data System...  

Office of Scientific and Technical Information (OSTI)

System: Transforming the Discovery, Access, and Analytics of Data for Geothermal Exploration Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log...

43

Enhanced Geothermal Systems Subprogram Overview  

Energy.gov (U.S. Department of Energy (DOE))

This overview of GTP's Enhanced Geothermal Systems subprogram was given at the GTP Program Peer Review on May 18, 2010.

44

Economic predictions for heat mining : a review and analysis of hot dry rock (HDR) geothermal energy technology  

E-Print Network (OSTI)

The main objectives of this study were first, to review and analyze several economic assessments of Hot Dry Rock (HDR) geothermal energy systems, and second, to reformulate an economic model for HDR with revised cost components.

Tester, Jefferson W.

1990-01-01T23:59:59.000Z

45

Black Rock Point Geothermal Area | Open Energy Information  

Open Energy Info (EERE)

Black Rock Point Geothermal Area Black Rock Point Geothermal Area Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermal Resource Area: Black Rock Point Geothermal Area Contents 1 Area Overview 2 History and Infrastructure 3 Regulatory and Environmental Issues 4 Exploration History 5 Well Field Description 6 Geology of the Area 7 Geofluid Geochemistry 8 NEPA-Related Analyses (0) 9 Exploration Activities (0) 10 References Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"TERRAIN","zoom":6,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"300px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.9553,"lon":-119.1141,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

46

Geographic Information System At International Geothermal Area...  

Open Energy Info (EERE)

navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geographic Information System At International Geothermal Area, Indonesia (Nash, Et Al., 2002) Exploration...

47

Enhanced Geothermal Systems (EGS) with CO2as Heat Transmission...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

study heat extraction from hot porous systems by injection of cold CO 2 . * Reactive chemistry experiments for CO 2 -brine-rock are being assembled (INL). 6 | US DOE Geothermal...

48

OIT geothermal system improvements  

SciTech Connect

Three geothermal wells drilled during the original campus construction vary from 396 m (1,300 ft) to 550 m (1,800 ft). These wells supply all of the heating and part of the cooling needs of the 11-building, 62,200 m{sup 2} (670,000 ft{sup 2}) campus. The combined capacity of the well pumps is 62 L/s(980 gpm) of 89{degrees}C (192{degrees}F) geothermal fluids. Swimming pool and domestic hot water heating impose a small but nearly constant year-round flow requirement. In addition to heating, a portion of the campus is also cooled using the geothermal resource. This is accomplished through the use of an absorption chiller. The chiller, which operates on the same principle as a gas refrigerator, requires a flow of 38 L/s (600 gpm) of geothermal fluid and produces 541 kW (154 tons) of cooling capacity (Rafferty, 1989). The annual operating costs for the system is about $35,000 including maintenance salary, equipment replacement and cost of pumping. This amounts to about $0.05 per square foot per year.

Lienau, P.J. [Geo-Heat Center, Klamath Falls, OR (United States)

1996-08-01T23:59:59.000Z

49

Mapping Fractures In The Medicine Lake Geothermal System | Open Energy  

Open Energy Info (EERE)

Fractures In The Medicine Lake Geothermal System Fractures In The Medicine Lake Geothermal System Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Mapping Fractures In The Medicine Lake Geothermal System Details Activities (1) Areas (1) Regions (0) Abstract: A major challenge to energy production in the region has been locating high-permability fracture zones in the largely impermeable volcanic host rock. An understanding of the fracture networks will be a key to harnessing geothermal resources in the Cascades Author(s): Steven Clausen, Michal Nemcok, Joseph Moore, Jeffrey Hulen, John Bartley Published: GRC, 2006 Document Number: Unavailable DOI: Unavailable Core Analysis At Medicine Lake Area (Clausen Et Al, 2006) Medicine Lake Geothermal Area Retrieved from "http://en.openei.org/w/index.php?title=Mapping_Fractures_In_The_Medicine_Lake_Geothermal_System&oldid=388927

50

Blind Geothermal System | Open Energy Information  

Open Energy Info (EERE)

Blind Geothermal System Blind Geothermal System Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Blind Geothermal System Dictionary.png Blind Geothermal System: An area with a geothermal heat source, but no modern surface manifestations. Other definitions:Wikipedia Reegle Modern Geothermal Features Typical list of modern geothermal features Hot Springs Fumaroles Warm or Steaming Ground Mudpots, Mud Pools, or Mud Volcanoes Geysers Blind Geothermal System Many geothermal areas show no signs of geothermal activity at the surface if the heated water is too far below or no conduits to the surface are available. An area of geothermal activity with no surface features is referred to as a "blind geothermal system." Examples Want to add an example to this list? Select a Geothermal Resource Area to

51

Enhanced Geothermal Systems (EGS) | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Enhanced Geothermal Systems (EGS) (Redirected from EGS) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Enhanced Geothermal Systems (EGS) Geothermal Technologies There are many types of Geothermal Technologies that take advantage of the earth's heat: Hydrothermal Systems Enhanced Geothermal Systems (EGS) Sedimentary Geothermal Systems Co-Produced Geothermal Systems Geothermal Direct Use Ground Source Heat Pumps EGS Links Related documents and websites DOE EGS Technical Roadmap DOE EGS Systems Demonstration Projects How EGS Works (Animation) EGS Development (Animation)

52

DOE and Partners Demonstrate Mobile Geothermal Power System at...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Partners Demonstrate Mobile Geothermal Power System at 2009 Geothermal Energy Expo DOE and Partners Demonstrate Mobile Geothermal Power System at 2009 Geothermal Energy Expo...

53

Geothermal utilization at Castle Oaks Subdivision, Castle Rock, Colorado  

SciTech Connect

Designs of geothermal systems for using warm water from four aquifers of the Denver Basin are presented. Advantages of using heat pumps with the geothermal resource are discussed. Two design cases-one with separate heat load and heat pump, and the other with the heat pump and heat load located at the well site-are evaluated in terms of pump costs, operating costs, and payback periods. The 20-year delivered energy costs for the two geothermal systems would be slightly less than those for natural gas ($5.64 to $6.42 versus $6.70 per million Btu).

Garing, K.L.; Coury, G.E.; Goering, S.W.

1982-04-01T23:59:59.000Z

54

Geothermal Site Assessment Using the National Geothermal Data System  

Open Energy Info (EERE)

Geothermal Site Assessment Using the National Geothermal Data System Geothermal Site Assessment Using the National Geothermal Data System (NGDS), with Examples from the Hawthorne Ammunition Depot Area Jump to: navigation, search Tool Summary Name: Geothermal Site Assessment Using the National Geothermal Data System (NGDS), with Examples from the Hawthorne Ammunition Depot Area Agency/Company /Organization: University of Nevada-Reno Sector: Energy Focus Area: Renewable Energy, Geothermal Topics: Resource assessment Resource Type: Case studies/examples, Publications Website: www.unr.edu/geothermal/pdffiles/PenfieldGRC2010_GeothermalSiteAssessme Cost: Free Language: English References: Paper[1] "This paper examines the features and functionality of the existing database, its integration into the 50-state NGDS, and its usage in

55

Hybrid Geothermal Heat Pump System Research Geothermal Project | Open  

Open Energy Info (EERE)

Hybrid Geothermal Heat Pump System Research Geothermal Project Hybrid Geothermal Heat Pump System Research Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Hybrid Geothermal Heat Pump System Research Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 2: Data Gathering and Analysis Project Description Geothermal, or ground-source heat pump systems have been shown to have superior energy performance to conventional heating and cooling systems in many building types and climates. There has been significant growth in the application of these systems; yet, geothermal systems have only been able to capture a few percent of the heating and cooling market. This is due primarily to the prohibitively high cost of installing the necessary ground loop.

56

National Geothermal Data System (NGDS)  

DOE Data Explorer (OSTI)

The National Geothermal Data System (NGDS) is a DOE-funded distributed network of databases and data sites. Much of the risk of geothermal energy development is associated with exploring for, confirming and characterizing the available geothermal resources. The overriding purpose of the NGDS is to help mitigate this up-front risk by serving as a central gateway for geothermal and relevant related data as well as a link to distributed data sources. Assessing and categorizing the nation's geothermal resources and consolidating all geothermal data through a publicly accessible data system will support research, stimulate public interest, promote market acceptance and investment, and, in turn, the growth of the geothermal industry. Major participants in the NGDS to date include universities, laboratories, the Arizona Geological Survey and Association of American State Geologists (Arizona Geological Survey, lead), the Geothermal Resources Council, and the U.S. Geological Survey. The Geothermal Energy Association is collaborating with the NGDS to insure that it meets the needs of the geothermal industry.

57

Demonstration of an Enhanced Geothermal System at the Northwest Geysers Geothermal Field, California  

Energy.gov (U.S. Department of Energy (DOE))

Geothermal Technologies Program 2010 Peer Review Demonstration of an Enhanced Geothermal System at the Northwest Geysers Geothermal Field California by Mark Walters of Calpine and Patrick Dobson of Lawrence Berkeley National Laboratory for Engineered Geothermal Systems Demonstration Projects Track. Objective to create an Enhanced Geothermal System (EGS) by directly and systematically injecting low volumes of cold? water into NW Geysers high temperature zone (HTZ), similar to inadvertently? created EGS in the oldest Geysers production area to the southeast of the EGS demonstration area. Other objectives are to investigate how cold-water injection mechanically and chemically affects fractured high temperature rock systems; demonstrate the technology to monitor and validate stimulation and sustainability of such an EGS; and develop an EGS research field laboratory that can be used for testing EGS stimulation and monitoring technologies including new high temperature tools developed by others.

58

Experiment-Based Model for the Chemical Interactions between Geothermal Rocks, Supercritical Carbon Dioxide and Water  

Energy.gov (U.S. Department of Energy (DOE))

Experiment-Based Model for the Chemical Interactions between Geothermal Rocks, Supercritical Carbon Dioxide and Water presentation at the April 2013 peer review meeting held in Denver, Colorado.

59

Bibliography of the geological and geophysical aspects of hot dry rock geothermal resources  

SciTech Connect

This is the first issue of an annual compilation of references that are useful to the exploration, understanding and development of the hot dry rock geothermal resource.

Heiken, G.; Sayer, S.

1980-02-01T23:59:59.000Z

60

Integrated Chemical Geothermometry System for Geothermal Exploration  

Energy.gov (U.S. Department of Energy (DOE))

DOE Geothermal Peer Review 2010 - Presentation. Develop practical and reliable system to predict geothermal reservoir temperatures from integrated chemical analyses of spring and well fluids.

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

National Geothermal Data System Architecture Design, Testing...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Architecture Design, Testing and Maintenance National Geothermal Data System Architecture Design, Testing and Maintenance Project objective: To create the National Geothermal Data...

62

Geochemistry of volcanic rocks from the Geysers geothermal area, California Coast Ranges  

E-Print Network (OSTI)

source of geothermal energy, is ulti- 0024-4937/$ - see front matter D 2005 Published by Elsevier BGeochemistry of volcanic rocks from the Geysers geothermal area, California Coast Ranges Axel K Potsdam, Germany c Philippine Geothermal, Inc., Makati, Philippines Received 1 May 2004; accepted 25 May

63

THE CONVERSION OF BIOMASS TO ETHANOL USING GEOTHERMAL ENERGY DERIVED FROM HOT DRY ROCK  

E-Print Network (OSTI)

97505 THE CONVERSION OF BIOMASS TO ETHANOL USING GEOTHERMAL ENERGY DERIVED FROM HOT DRY ROCK between a hot dry rock (HDR) geothermal energy source and the power requirements for the conversion of biomass to fuel ethanol is considerable. In addition, combining these two renewable energy resources

64

EXPERIMENTAL VERIFICATION OF THE LOAD-FOLLOWING POTENTIAL OF A HOT DRY ROCK GEOTHERMAL RESERVOIR  

E-Print Network (OSTI)

was about 2 minutes. INTRODUCTION The Hot Dry Rock (HDR) geothermal reservoir at Fenton Hill, New MexicoEXPERIMENTAL VERIFICATION OF THE LOAD-FOLLOWING POTENTIAL OF A HOT DRY ROCK GEOTHERMAL RESERVOIR Mexico 87545 ABSTRACT A recent 6-day flow experiment conducted at the Los Alamos National Laboratory

65

Isotope Transport and Exchange within the Coso Geothermal System | Open  

Open Energy Info (EERE)

Transport and Exchange within the Coso Geothermal System Transport and Exchange within the Coso Geothermal System Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Isotope Transport and Exchange within the Coso Geothermal System Details Activities (1) Areas (1) Regions (0) Abstract: We are investigating the plumbing of the Coso geothermal system and the nearby Coso Hot Springs using finite element models of single-phase, variable-density fluid flow, conductive- convective heat transfer, fluid-rock isotope exchange, and groundwater residence times. Using detailed seismic reflection data and geologic mapping, we constructed a regional crosssectional model that extends laterally from the Sierra Nevada to Wildhorse Mesa, west of the Argus Range. The base of the model terminates at the brittle-ductile transition zone. A sensitivity study was

66

Black Rock I Geothermal Project | Open Energy Information  

Open Energy Info (EERE)

Rock I Geothermal Project Rock I Geothermal Project Project Location Information Coordinates The following coordinate was not recognized: 33°19'59" N, 115°50'3 W.The following coordinate was not recognized: 33°19'59" N, 115°50'3 W. Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.3705792,"lon":-115.77401,"alt":0,"address":"33\u00b019'59\" N, 115\u00b050'3 W","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

67

Black Rock II Geothermal Project | Open Energy Information  

Open Energy Info (EERE)

Black Rock II Geothermal Project Black Rock II Geothermal Project Project Location Information Coordinates The following coordinate was not recognized: 33°19'59" N, 115°50'3 W.The following coordinate was not recognized: 33°19'59" N, 115°50'3 W. Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.3705792,"lon":-115.77401,"alt":0,"address":"33\u00b019'59\" N, 115\u00b050'3 W","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

68

Enhanced Geothermal System (EGS) Fact Sheet | Department of Energy  

Office of Environmental Management (EM)

Enhanced Geothermal System (EGS) Fact Sheet Enhanced Geothermal System (EGS) Fact Sheet Overview of Enhanced Geothermal Systems. egsbasics.pdf More Documents & Publications...

69

A Demonstration System for Capturing Geothermal Energy from Mine Waters  

Open Energy Info (EERE)

System for Capturing Geothermal Energy from Mine Waters System for Capturing Geothermal Energy from Mine Waters beneath Butte, MT Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title A Demonstration System for Capturing Geothermal Energy from Mine Waters beneath Butte, MT Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 1: Technology Demonstration Projects Project Description Butte, Montana, like many other mining towns that developed because of either hard-rock minerals or coal, is underlain by now-inactive water-filled mines. In Butte's case, over 10,000 miles of underground workings have been documented, but as in many other mining communities these waters are regarded as more of a liability than asset. Mine waters offer several advantages:

70

Seismic Technology Adapted to Analyzing and Developing Geothermal Systems  

Open Energy Info (EERE)

Technology Adapted to Analyzing and Developing Geothermal Systems Technology Adapted to Analyzing and Developing Geothermal Systems Below Surface-Exposed High-Velocity Rocks Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Seismic Technology Adapted to Analyzing and Developing Geothermal Systems Below Surface-Exposed High-Velocity Rocks Project Type / Topic 1 Recovery Act: Enhanced Geothermal Systems Component Research and Development/Analysis Project Type / Topic 2 Geophysical Exploration Technologies Project Description Historically, areas where the Earth surface is covered by an exposed high-velocity rock layer have been locations where conventional, single-component, seismic P-waves have failed to provide usable geological information. The research will use new seismic sources that emphasize shear waves and new seismic data-acquisition technology based on cable-free data recording to acquire seismic research data across two sites covered with surface-exposed highvelocity rocks. Research tasks will involve acquiring, processing, and interpreting both conventional seismic data and multicomponent seismic data. Scientists at BEG will analyze well logs, cores, and reservoir test data to construct geological models of the targeted geology across each study site.

71

How an Enhanced Geothermal System Works Animation - Text Version...  

Office of Environmental Management (EM)

well is drilled into hot basement rock that has limited permeability and fluid content. This type of geothermal resource is sometimes referred to as "hot, dry rock" and...

72

First Commercial Success for Enhanced Geothermal Systems (EGS...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Commercial Success for Enhanced Geothermal Systems (EGS) Spells Exponential Growth for Geothermal Energy First Commercial Success for Enhanced Geothermal Systems (EGS) Spells...

73

Energy Department Announces National Geothermal Data System to...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Energy Department Announces National Geothermal Data System to Accelerate Geothermal Energy Development Energy Department Announces National Geothermal Data System to Accelerate...

74

Hot Dry Rock Geothermal Reservoir Testing- 1978 To 1980 | Open Energy  

Open Energy Info (EERE)

Dry Rock Geothermal Reservoir Testing- 1978 To 1980 Dry Rock Geothermal Reservoir Testing- 1978 To 1980 Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Hot Dry Rock Geothermal Reservoir Testing- 1978 To 1980 Details Activities (3) Areas (1) Regions (0) Abstract: The Phase I Hot Dry Rock Geothermal Energy reservoirs at the Fenton Hill field site grew continuously during Run Segments 2 through 5 (January 1978 to December 1980). Reservoir growth was caused not only by pressurization and hydraulic fracturing, but also by heat-extraction and thermal-contraction effects. Reservoir heat-transfer area grew from 8000 to 50,000 m2 and reservoir fracture volume grew from 11 to 266 m3. Despite this reservoir growth, the water loss rate increased only 30%, under similar pressure environments. For comparable temperature and pressure

75

The economics of heat mining: An analysis of design options and performance requirements of hot dry rock (HDR) geothermal power systems  

SciTech Connect

A generalized economic model was developed to predict the breakeven price of HDR generated electricity. Important parameters include: (1) resource quality--average geothermal gradient ({sup o}C/km) and well depth, (2) reservoir performance--effective productivity, flow impedance, and lifetime (thermal drawdown rate), (3) cost components--drilling, reservoir formation, and power plant costs and (4) economic factors--discount and interest rates, taxes, etc. Detailed cost correlations based on historical data and results of other studies are presented for drilling, stimulation, and power plant costs. Results of the generalized model are compared to the results of several published economic assessments. Critical parameters affecting economic viability are drilling costs and reservoir performance. For example, high gradient areas are attractive because shallower well depths and/or lower reservoir production rates are permissible. Under a reasonable set of assumptions regarding reservoir impedance, accessible rock volumes and surface areas, and mass flow rates (to limit thermal drawdown rates to about 10 C per year), predictions for HDR-produced electricity result in competitive breakeven prices in the range of 5 to 9 cents/kWh for resources having average gradients above 50 C/km. Lower gradient areas require improved reservoir performance and/or lower well drilling costs.

Tester, Jefferson W.; Herzog, Howard J.

1991-01-25T23:59:59.000Z

76

Experiment-based modeling of geochemical interactions in CO2-based geothermal systems  

E-Print Network (OSTI)

2000), A hot dry rock geothermal energy concept utilizingsequestration with geothermal energy capture in naturallyreservoirs) for geothermal energy recovery. The major

Jung, Y.

2014-01-01T23:59:59.000Z

77

Enhanced Geothermal Systems (EGS) comparing water with CO2 as heat transmission fluids  

E-Print Network (OSTI)

D.W. A Hot Dry Rock Geothermal Energy Concept Utilizingcombine recovery of geothermal energy with simultaneous1. Introduction Geothermal energy extraction is currently

Pruess, Karsten

2007-01-01T23:59:59.000Z

78

Hot Dry Rock Geothermal Energy Development Program. Annual report, fiscal year 1979  

SciTech Connect

The Fenton Hill Project is still the principal center for developing methods, equipment, and instrumentation for creating and utilizing HDR geothermal reservoirs. The search for a second site for a similar experimental system in a different geological environment has been intensified, as have the identification and characterization of other HDR areas that may prove suitable for either experimental or commercial development. The Phase I fracture system was enlarged during FY79. Drilling of the injection well of the Phase II system began at Fenton Hill in April 1979. Environmental monitoring of the Fenton Hill area continued through FY79. The environmental studies indicate that the hot dry rock operations have caused no significant environmental impact. Other supporting activities included rock physics, rock mechanics, fracture mapping, and instrumentation development. Two closely related activities - evaluation of the potential HDR energy resource of the US and the selection of a site for development of a second experimental heat-extraction system generally similar to that at Fenton Hill - have resulted in the collection of geology, hydrology, and heat-flow data on some level of field activity in 30 states. The resource-evaluation activity included reconnaissance field studies and a listing and preliminary characterization of US geothermal areas in which HDR energy extraction methods may be applicable. The selection of Site 2 has taken into account such legal, institutional, and economic factors as land ownership and use, proximity to possible users, permitting and licensing requirements and procedures, environmental issues, areal extent of the geothermal area, and visibility to and apparent interest by potential industrial developers.

Cremer, G.M.; Duffield, R.B.; Smith, M.C.; Wilson, M.G. (comps.)

1980-08-01T23:59:59.000Z

79

Reconnaissance geophysical studies of the geothermal system in southern  

Open Energy Info (EERE)

geophysical studies of the geothermal system in southern geophysical studies of the geothermal system in southern Raft River Valley, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Reconnaissance geophysical studies of the geothermal system in southern Raft River Valley, Idaho Details Activities (4) Areas (1) Regions (0) Abstract: Gravity, aeromagnetic, and telluric current surveys in the southern Raft River have been used to infer the structure and the general lithology underlying the valley. The gravity data indicate the approximate thickness of the Cenozoic rocks and location of the larger normal faults, and the aeromagnetic data indicate the extent of the major Cenozoic volcanic units. The relative ellipse area contour map compiled from the telluric current survey generally conforms to the gravity map except for

80

Geographic Information System At Lightning Dock Geothermal Area...  

Open Energy Info (EERE)

navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geographic Information System At Lightning Dock Geothermal Area (Getman, 2014) Exploration Activity...

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Geothermal: Sponsored by OSTI -- NATIONAL GEOTHERMAL DATA SYSTEM...  

Office of Scientific and Technical Information (OSTI)

SYSTEM: AN EXEMPLAR OF OPEN ACCESS TO DATA Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On HomeBasic Search About Publications Advanced...

82

Stress and fault rock controls on fault zone hydrology, Coso geothermal  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Stress and fault rock controls on fault zone hydrology, Coso geothermal field, CA Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Stress and fault rock controls on fault zone hydrology, Coso geothermal field, CA Details Activities (1) Areas (1) Regions (0) Abstract: In crystalline rock of the Coso Geothermal Field, CA, fractures are the primary source of permeability. At reservoir depths, borehole image, temperature, and mud logs indicate fluid flow is concentrated in extensively fractured damage zones of large faults well-oriented for slip.

83

36Cl/Cl ratios in geothermal systems- preliminary measurements from the  

Open Energy Info (EERE)

Cl/Cl ratios in geothermal systems- preliminary measurements from the Cl/Cl ratios in geothermal systems- preliminary measurements from the Coso Field Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: 36Cl/Cl ratios in geothermal systems- preliminary measurements from the Coso Field Details Activities (1) Areas (1) Regions (0) Abstract: The {sub 36}Cl/Cl isotopic composition of chlorine in geothermal systems can be a useful diagnostic tool in characterizing hydrologic structure, in determining the origins and age of waters within the systems, and in differentiating the sources of chlorine (and other solutes) in the thermal waters. The {sub 36}Cl/Cl values for several geothermal water samples and reservoir host rock samples from the Coso, California geothermal field have been measured for these purposes. The results

84

Detection and Characterization of Natural and Induced Fractures for the Development of Enhanced Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

Project objectives: Combine geophysical methods for reservoir and fracture characterization with rock physics measurements made under in-situ conditions (up to 350?C) for development of geothermal systems.

85

First Commercial Success for Enhanced Geothermal Systems (EGS) Spells Exponential Growth for Geothermal Energy  

Energy.gov (U.S. Department of Energy (DOE))

The Obama Administration's all-of-the-above energy strategy took a leap forward today with the Energy Department's announcement recognizing the nation's first commercial enhanced geothermal system (EGS) project to supply electricity to the grid. This landmark accomplishment follows two other major DOE-funded technical achievements focused on demonstrating the commercial viability of EGS: The Calpine EGS demonstration at The Geysers in Middletown, California and the AltaRock project at Newberry Volcano near Bend, Oregon.

86

Enhanced Geothermal Systems (EGS) R&D Program: US Geothermal Resources Review and Needs Assessment  

SciTech Connect

The purpose of this report is to lay the groundwork for an emerging process to assess U.S. geothermal resources that might be suitable for development as Enhanced Geothermal Systems (EGS). Interviews of leading geothermists indicate that doing that will be intertwined with updating assessments of U.S. higher-quality hydrothermal resources and reviewing methods for discovering ''hidden'' hydrothermal and EGS resources. The report reviews the history and status of assessment of high-temperature geothermal resources in the United States. Hydrothermal, Enhanced, and Hot Dry Rock resources are addressed. Geopressured geothermal resources are not. There are three main uses of geothermal resource assessments: (1) They inform industry and other interest parties of reasonable estimates of the amounts and likely locations of known and prospective geothermal resources. This provides a basis for private-sector decisions whether or not to enter the geothermal energy business at all, and for where to look for useful resources. (2) They inform government agencies (Federal, State, local) of the same kinds of information. This can inform strategic decisions, such as whether to continue to invest in creating and stimulating a geothermal industry--e.g., through research or financial incentives. And it informs certain agencies, e.g., Department of Interior, about what kinds of tactical operations might be required to support such activities as exploration and leasing. (3) They help the experts who are performing the assessment(s) to clarify their procedures and data, and in turn, provide the other two kinds of users with a more accurate interpretation of what the resulting estimates mean. The process of conducting this assessment brings a spotlight to bear on what has been accomplished in the domain of detecting and understanding reservoirs, in the period since the last major assessment was conducted.

Entingh, Dan; McLarty, Lynn

2000-11-30T23:59:59.000Z

87

NATIONAL GEOTHERMAL DATA SYSTEM (NGDS) GEOTHERMAL DATA DOMAIN: ASSESSMENT OF GEOTHERMAL COMMUNITY DATA NEEDS  

SciTech Connect

To satisfy the critical need for geothermal data to ad- vance geothermal energy as a viable renewable ener- gy contender, the U.S. Department of Energy is in- vesting in the development of the National Geother- mal Data System (NGDS). This paper outlines efforts among geothermal data providers nationwide to sup- ply cutting edge geo-informatics. NGDS geothermal data acquisition, delivery, and methodology are dis- cussed. In particular, this paper addresses the various types of data required to effectively assess geother- mal energy potential and why simple links to existing data are insufficient. To create a platform for ready access by all geothermal stakeholders, the NGDS in- cludes a work plan that addresses data assets and re- sources of interest to users, a survey of data provid- ers, data content models, and how data will be ex- changed and promoted, as well as lessons learned within the geothermal community.

Anderson, Arlene [United States Department of Energy; Blackwell, David [Southern Methodist University; Chickering, Cathy [Southern Methodist University; Boyd, Toni [Oregon Institute of Technology; Horne, Roland [Stanford University; MacKenzie, Matthew [Uberity Technology Corporation; Moore, Joseph [University of Utah; Nickull, Duane [Uberity Technology Corporation; Richard, Stephen [Arizona Geological survey; Shevenell, Lisa A. [University of Nevada, Reno

2013-01-01T23:59:59.000Z

88

MEMS Materials and Temperature Sensors for Down Hole Geothermal System Monitoring  

E-Print Network (OSTI)

Geothermal EnergyThe future of geothermal energy: Impact of enhanceddown-hole monitoring of geothermal energy systems. ASME 2011

Wodin-Schwartz, Sarah

2013-01-01T23:59:59.000Z

89

National Geothermal Data System (NGDS) Initiative | Department...  

Office of Environmental Management (EM)

Moniz officially announced deployment of the National Geothermal Data System at the White House Energy Datapalooza on May 28, 2014 in Washington, DC. Learn more. For a...

90

The furnace in the basement: Part 1, The early days of the Hot Dry Rock Geothermal Energy Program, 1970--1973  

SciTech Connect

This report presents the descriptions of the background information and formation of the Los Alamos Scientific Laboratory Geothermal Energy Group. It discusses the organizational, financial, political, public-relations,geologic, hydrologic, physical, and mechanical problems encountered by the group during the period 1970--1973. It reports the failures as well as the successes of this essential first stage in the development of hot dry rock geothermal energy systems.

Smith, M.C.

1995-09-01T23:59:59.000Z

91

The xerolithic geothermal (``hot dry rock``) energy resource of the United States: An update  

SciTech Connect

This report presents revised estimates, based upon the most current geothermal gradient data, of the xerolithic geothermal (``hot dry rock`` or HDR) energy resources of the United States. State-by-state tabular listings are provided of the HDR energy resource base, the accessible resource base, and the potentially useful resource base. The latter further subdivided into components with potential for electricity generation, process heat, and space heat. Comparisons are made with present estimates of fossil fuel reserves. A full-sized geothermal gradient contour map is provided as a supplement in a pocket inside the back cover of the report.

Nunz, G.J.

1993-07-01T23:59:59.000Z

92

An Updated Numerical Model Of The Larderello-Travale Geothermal System,  

Open Energy Info (EERE)

Of The Larderello-Travale Geothermal System, Of The Larderello-Travale Geothermal System, Italy Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: An Updated Numerical Model Of The Larderello-Travale Geothermal System, Italy Details Activities (0) Areas (0) Regions (0) Abstract: Larderello-Travale is one of the few geothermal systems in the world that is characterized by a reservoir pressure much lower than hydrostatic. This is a consequence of its natural evolution from an initial liquid-dominated to the current steam-dominated system. Beneath a nearly impermeable cover, the geothermal reservoir consists of carbonate-anhydrite formations and, at greater depth, by metamorphic rocks. The shallow reservoir has temperatures in the range of 220-250°C, and pressures of about 20 bar at a depth of 1000 m, while the deep metamorphic reservoir has

93

Development of a Hydrothermal Spallation Drilling System for EGS Geothermal  

Open Energy Info (EERE)

Hydrothermal Spallation Drilling System for EGS Geothermal Hydrothermal Spallation Drilling System for EGS Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Development of a Hydrothermal Spallation Drilling System for EGS Project Type / Topic 1 Recovery Act: Enhanced Geothermal Systems Component Research and Development/Analysis Project Type / Topic 2 Drilling Systems Project Description Potter Drilling has recently demonstrated hydrothermal spallation drilling in the laboratory. Hydrothermal spallation drilling creates boreholes using a focused jet of superheated water, separating individual grains ("spalls") from the rock surface without contact between the rock and the drill head. This process virtually eliminates the need for tripping. Previous tests of flame-jet spallation achieved ROP of 50 ft/hr and higher in hard rock with minimal wear on the drilling assembly, but operating this technology in an air-filled borehole created challenges related to cuttings transport and borehole stability. The Potter Drilling system uses a water based jet technology in a fluid-filled borehole and as a result has the potential to achieve similarly high ROP that is uncompromised by stability or cuttings transport issues.

94

Co-Produced Geothermal Systems | Open Energy Information  

Open Energy Info (EERE)

Produced Geothermal Systems Produced Geothermal Systems Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Co-Produced Geothermal Systems Geothermal Technologies There are many types of Geothermal Technologies that take advantage of the earth's heat: Hydrothermal Systems Enhanced Geothermal Systems (EGS) Sedimentary Geothermal Systems Co-Produced Geothermal Systems Geothermal Direct Use Ground Source Heat Pumps Dictionary.png Co-Produced Geothermal System: Co-Produced water is the water that is produced as a by-product during oil and gas production. If there is enough water produced at a high enough temperature co-produced water can be utilized for electricity production. Other definitions:Wikipedia Reegle General Air Cooled Co-Produced geothermal system demonstration at RMOTC oil site.

95

Flathead Electric Cooperative Facility Geothermal Heat Pump System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Flathead Electric Cooperative Facility Geothermal Heat Pump System Upgrade Flathead Electric Cooperative Facility Geothermal Heat Pump System Upgrade Project Will Take Advantage of...

96

Enhanced Geothermal Systems Documents for Public Comment - Now...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Enhanced Geothermal Systems Documents for Public Comment - Now Closed Enhanced Geothermal Systems Documents for Public Comment - Now Closed February 28, 2012 - 3:41pm Addthis ****...

97

National Geothermal Data Systems Data Acquisition and Access...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

National Geothermal Data Systems Data Acquisition and Access National Geothermal Data Systems Data Acquisition and Access Project objective: To support the acquisition of new and...

98

Ground heat exchanger design for direct geothermal energy systems .  

E-Print Network (OSTI)

??Direct geothermal energy systems use the ground to heat and cool buildings. Ground-source heat pump (GSHP) systems are the most widespread form of direct geothermal (more)

COLLS, STUART

2013-01-01T23:59:59.000Z

99

National Geothermal Data System Design and Testing | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Design and Testing National Geothermal Data System Design and Testing National Geothermal Data System Design and Testing presentation at the April 2013 peer review meeting held in...

100

DOE and Partners Test Enhanced Geothermal Systems Technologies...  

Office of Environmental Management (EM)

DOE and Partners Test Enhanced Geothermal Systems Technologies DOE and Partners Test Enhanced Geothermal Systems Technologies February 20, 2008 - 4:33pm Addthis DOE has embarked on...

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Fracture Characterization in Enhanced Geothermal Systems by Wellbore...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fracture Characterization in Enhanced Geothermal Systems by Wellbore and Reservoir Analysis Fracture Characterization in Enhanced Geothermal Systems by Wellbore and Reservoir...

102

DOE Announces Webinars on the National Geothermal Data System...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

the National Geothermal Data System, Energy Efficiency and Renewable Energy Benefits for Tribal Communities, and More DOE Announces Webinars on the National Geothermal Data System,...

103

Iowa: Geothermal System Creates Jobs, Reduces Emissions in Rural...  

Office of Environmental Management (EM)

geothermal system. All mini-grant funds are allocated and will be reimbursed now that the energy improvements and geothermal systems are being installed in the buildings. The...

104

Development of Exploration Methods for Engineered Geothermal Systems  

Open Energy Info (EERE)

Exploration Methods for Engineered Geothermal Systems Exploration Methods for Engineered Geothermal Systems through Integrated Geophysical, Geologic and Geochemical Interpretation. Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Development of Exploration Methods for Engineered Geothermal Systems through Integrated Geophysical, Geologic and Geochemical Interpretation. Project Type / Topic 1 Recovery Act: Enhanced Geothermal Systems Component Research and Development/Analysis Project Type / Topic 2 Geophysical Exploration Technologies Project Description A comprehensive, interdisciplinary approach is proposed using existing geophysical exploration technology coupled with new seismic techniques and subject matter experts to determine the combination of geoscience data that demonstrates the greatest potential for identifying EGS drilling targets using non-invasive techniques. This proposed exploration methodology is expected to increase spatial resolution and reduce the non-uniqueness that is inherent in geological data, thereby reducing the uncertainty in the primary selection criteria for identifying EGS drilling targets. These criteria are, in order of importance: (1) temperatures greater than 200-250°C at 1-5 km depth; (2) rock type at the depth of interest, and; (3) stress regime.

105

Enhanced Geothermal Systems (EGS) R&D Program: Monitoring EGS-Related Research  

SciTech Connect

This report reviews technologies that could be applicable to Enhanced Geothermal Systems development. EGS covers the spectrum of geothermal resources from hydrothermal to hot dry rock. We monitored recent and ongoing research, as reported in the technical literature, that would be useful in expanding current and future geothermal fields. The literature review was supplemented by input obtained through contacts with researchers throughout the United States. Technologies are emerging that have exceptional promise for finding fractures in nonhomogeneous rock, especially during and after episodes of stimulation to enhance natural permeability.

McLarty, Lynn; Entingh, Daniel; Carwile, Clifton

2000-09-29T23:59:59.000Z

106

GRC Transactions, Vol. 34, 2010 Geothermal, Engineered Geothermal Systems, EGS, induced  

E-Print Network (OSTI)

of IIS, the importance of IIS to the growth of the geothermal energy industry, and suggest possible paths-effect. Injection Induced Seismicity and Geothermal Energy Trenton Cladouhos1 , Susan Petty1 , Gillian Foulger2GRC Transactions, Vol. 34, 2010 1213 Keywords Geothermal, Engineered Geothermal Systems, EGS

Foulger, G. R.

107

The UK geothermal hot dry rock R&D programme  

SciTech Connect

The UK hot dry rock research and development programme is funded by the Department of Energy and aims to demonstrate the feasibility of commercial exploitation of HDR in the UK. The philosophy of the UK programme has been to proceed to a full-scale prototype HDR power station via a number of stages: Phase 1--Experiments at shallow depth (300 m) to assess the feasibility of enhancing the permeability of the rock. Phase 2--Studies at intermediate depth (2500 m) to determine the feasibility of creating a viable HDR subsurface heat exchanger. Phase 3--Establishment of an HDR prototype at commercial depth. The programme has run over a 15 year period, and has been formally reviewed at stages throughout its progress. The 1987 review towards the end of Phase 2 identified a number of technical objectives for continuing research and proposed that the initial design stage of the deep HDR prototype should start. Phase 3A is now complete. It addressed: the feasibility of creating an underground HDR heat exchanger suitable for commercial operation; techniques for improving hydraulic performance and correcting short circuits in HDR systems; modeling of the performance, resource size and economic aspects of HDR systems. The work has been conducted by a number of contractors, including Cambome School of Mines, Sunderland and Sheffield City Polytechnics and RTZ Consultants Limited. This paper focuses upon the experimental work at Rosemanowes in Cornwall and the recently completed conceptual design of a prototype HDR power station. The economics of HDR-generated electricity are also discussed and the conclusions of a 1990 program review are presented. Details of the HDR program to 1994, as announced by the UK Department of Energy in February 1991, are included.

MacDonald, Paul; Stedman, Ann; Symons, Geoff

1992-01-01T23:59:59.000Z

108

Practical Approach in Design of HVAC Systems Utilizing Geothermal Energy  

Science Journals Connector (OSTI)

Geothermal is the Earths thermal energy. In recent years geothermal energy has been utilized for generation of electricity, heating and air conditioning (HVAC). Geothermal HVAC systems are cost effective, energy

M. Fathizadeh; D. Seims

2014-01-01T23:59:59.000Z

109

Enhanced Geothermal System (EGS) Fact Sheet | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Overview of Enhanced Geothermal Systems. egsbasics.pdf More Documents & Publications Calpine Staff Run Tests at The Geysers Geothermal Power Plant in California Enhanced...

110

A fundamental study on hybrid geothermal energy systems.  

E-Print Network (OSTI)

??Research Doctorate - Doctor of Philosophy (PhD) This thesis focuses on a fundamental study of hybrid geothermal energy systems, in which geothermal energy is hybridised (more)

Zhou, Cheng

2014-01-01T23:59:59.000Z

111

Sandia National Laboratories: enhanced geothermal systems R&D  

NLE Websites -- All DOE Office Websites (Extended Search)

enhanced geothermal systems R&D Sandia Wins DOE Geothermal Technologies Office Funding Award On December 15, 2014, in Advanced Materials Laboratory, Capabilities, Energy,...

112

Geographic Information System At Dixie Valley Geothermal Area...  

Open Energy Info (EERE)

Geographic Information System At Dixie Valley Geothermal Area (Iovenitti, Et Al., 2012) Exploration Activity Details Location Dixie Valley Geothermal Area Exploration Technique...

113

Fracture Characterization in Enhanced Geothermal Systems by Wellbore...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Fracture Characterization in Enhanced Geothermal Systems by Wellbore and Reservoir Analysis; 2010 Geothermal Technology Program Peer Review Report Fracture Characterization in...

114

Mathematical model of a Hot Dry Rock system  

Science Journals Connector (OSTI)

......efficiency calculations, geothermal energy, Hot Dry Rock, multiple crack...is to estimate the amount of energy which may be produced by a geothermic power station. Heat capacity...provides a large resource of energy. To obtain the energy cold......

Norbert Heuer; Tassilo Kpper; Dirk Windelberg

1991-06-01T23:59:59.000Z

115

Rock Sampling At Long Valley Caldera Geothermal Area (Goff, Et...  

Open Energy Info (EERE)

pre-intrusive metavolcanic and metasedimentary rocks can have considerably higher Sr-isotope ratios (0.7061-0.7246 and 0.7090-0.7250, respectively). Hydrothermally altered...

116

FORSITE: a geothermal site development forecasting system  

SciTech Connect

The Geothermal Site Development Forecasting System (FORSITE) is a computer-based system being developed to assist DOE geothermal program managers in monitoring the progress of multiple geothermal electric exploration and construction projects. The system will combine conceptual development schedules with site-specific status data to predict a time-phased sequence of development likely to occur at specific geothermal sites. Forecasting includes estimation of industry costs and federal manpower requirements across sites on a year-by-year basis. The main advantage of the system, which relies on reporting of major, easily detectable industry activities, is its ability to use relatively sparse data to achieve a representation of status and future development.

Entingh, D.J.; Gerstein, R.E.; Kenkeremath, L.D.; Ko, S.M.

1981-10-01T23:59:59.000Z

117

Induced seismicity associated with enhanced geothermal system  

E-Print Network (OSTI)

Coast geopressured-geothermal wells: Two studies, Pleasantinduced by geopressured-geothermal well development. In:

Majer, Ernest L.

2006-01-01T23:59:59.000Z

118

Energy Department Announces National Geothermal Data System to Accelerate Geothermal Energy Development  

Energy.gov (U.S. Department of Energy (DOE))

The National Geothermal Data System is online open-source platform that facilitates the discovery and use of geothermal data. It will help address one of the greatest barriers to development and deployment of this promising clean energy source.

119

Hot dry rock geothermal energy -- a renewable energy resource that is ready for development now  

SciTech Connect

Hot dry rock (HDR) geothermal energy, which utilizes the natural heat contained in the earth's crust, is a very large and well-distributed resource of nonpolluting, and essentially renewable, energy that is available globally. Its use could help mitigate climatic change and reduce acid rain, two of the major environmental consequences of our ever-increasing use of fossil fuels for heating and power generation. In addition, HDR, as a readily available source of indigenous energy, can reduce our nations's dependence on imported oil, enhancing national security and reducing our trade deficit. The earth's heat represents an almost unlimited source of energy that can begin to be exploited within the next decade through the HDR heat-mining concept being actively developed in the United States, Great Britain, Japan, and several other countries. On a national scale we can begin to develop this new source, using it directly for power generation or for direct-heat applications, or indirectly in hybrid geothermal/fossil-fuel power plants. In the HDR concept, which has been demonstrated in the field in two different applications and flow- tested for periods up to one year, heat is recovered from the earth by pressurized water in a closed-loop circulation system. As a consequence, minimal effluents are released to the atmosphere, and no wastes are produced. This paper describes the nature of the HDR resource and the technology required to implement the heat-mining concept. An assessment of the requirements for establishing HDR feasibility is presented in the context of providing a commercially competitive energy source.

Brown, D.W.; Potter, R.M.; Myers, C.W.

1990-01-01T23:59:59.000Z

120

Subsurface Geology of the Fenton Hill Hot Dry Rock Geothermal Energy Site  

SciTech Connect

The Precambrian rock penetrated by wells EE-2A and -3A belongs to one or more granitic to granodioritic plutons. The plutonic rock contains two major xenolith zones of amphibolite, locally surrounded by fine-grained mafic rock of hybrid igneous origin. The granodiorite is cut by numerous leucogranite dikes that diminish in abundance with depth. The most prominent structural feature is the main breccia zone, in which the rock is highly fractured and moderately altered. This zone is at least 75 m thick and is of uncertain but near-horizontal orientation. Fracture abundance decreases with increasing depth below the main breccia zone, and fractures tend to be associated with leucogranite dikes. This association suggests that at least some of the fractures making up the geothermal reservoir are of Precambrian age or have long-range orientations controlled by the presence of Precambrian-age granitic dikes.

Levey, Schon S.

2010-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Sandia National Laboratories: Geothermal  

NLE Websites -- All DOE Office Websites (Extended Search)

Geothermal Geothermal Energy & Drilling Technology On November 10, 2010, in Geothermal energy is an abundant energy resource that comes from tapping the natural heat of molten rock...

122

DOE and Partners Demonstrate Mobile Geothermal Power System at 2009 Geothermal Energy Expo  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Department of Energy's (DOE) Geothermal Technologies Office (GTO), along with Pratt & Whitney Power Systems, and Chena Power LLC demonstrated the PureCycle mobile geothermal power generation unit at the 2009 Geothermal Energy Expo in Reno, Nevada.

123

National Geothermal Data System (NGDS) Geothermal Data: Community Requirements and Information Engineering  

SciTech Connect

To satisfy the critical need for geothermal data to advance geothermal energy as a viable renewable energy contender, the U.S. Department of Energy is investing in the development of the National Geothermal Data System (NGDS). This paper outlines efforts among geothermal data providers nationwide to supply cutting edge geo-informatics. NGDS geothermal data acquisition, delivery, and methodology are discussed. In particular, this paper addresses the various types of data required to effectively assess geothermal energy potential and why simple links to existing data are insufficient. To create a platform for ready access by all geothermal stakeholders, the NGDS includes a work plan that addresses data assets and resources of interest to users, a survey of data providers, data content models, and how data will be exchanged and promoted, as well as lessons learned within the geothermal community.

Anderson, Arlene [United States Department of Energy; Blackwell, David [Southern Methodist University; Chickering, Cathy [Southern Methodist University; Boyd, Toni [Oregon Institute of Technology; Horne, Roland [Stanford University; MacKenzie, Matthew [Uberity Technology Corporation; Moore, Joseph [University of Utah; Nickull, Duane [Uberity Technology Corporation; Richard, Stephen [Arizona Geological survey; Shevenell, Lisa A. [University of Nevada, Reno

2013-10-01T23:59:59.000Z

124

Hot Dry Rock Geothermal Energy Development Program Annual Report Fiscal Year 1988  

SciTech Connect

The complete list of HDR objectives is provided in Reference 10, and is tabulated below in Tables 1 and 2 for the reader's convenience. The primary, level 1, objective for HDR is ''to improve the technology to the point where electricity could be produced commercially from a substantial number of known HDR resource sites in a cost range of 5 to 8 cents/kWh by 1997''. A critically important milestone in attaining this cost target is the level II objective: ''Evaluate the performance of the Fenton Hill Phase II reservoir''. To appreciate the significance of this objective, a brief background is helpful. During the past 14 years the US DOE has invested $123 million to develop the technology required to make Hot Dry Rock geothermal energy commercially useful. The Governments of Japan and the Federal Republic of Germany have contributed an additional $32 million to the US program. The initial objectives of the program were met by the successful development and long-term operation of a heat-extraction loop in hydraulically-fractured hot dry rock. This Phase I reservoir produced pressurized hot water at temperatures and flow rates suitable for many commercial uses such as space heating and food processing. It operated for more than a year with no major problems or detectable environmental effect. With this accomplished and the technical feasibility of HDR energy systems demonstrated, the program undertook the more difficult task of developing a larger, deeper, hotter reservoir, called ''Phase II'', capable of supporting pilot-plant-scale operation of a commercial electricity-generating power plant. As described earlier in ''History of Research'', such a system was created and operated successfully in a preliminary 30-day flow test. However, to justify capital investment in HDR geothermal technology, industry now requires assurance that the reservoir can be operated for a long time without major problems or a significant decrease in the rate and quality of energy production. Industrial advisors to the HDR Program have concluded that, while a longer testing period would certainly be desirable, a successful and well-documented flow test of this high-temperature, Phase II reservoir lasting at least one year should convince industry that HDR geothermal energy merits their investment in its commercial development. This test is called the Long Term Flow Test (LTFT), and its completion will be a major milestone in attaining the Level 1 objective. However, before the LTFT could be initiated, well EE-2 had to be repaired, as also briefly described in the ''History of Research''. During this repair operation, superb progress was made toward satisfying the next most critically important Level II objective: Improve the Performance of HDR Drilling and Completion Technology. During the repair of EE-2, Los Alamos sidetracked by drilling out of the damaged well at 2.96 km (9700 ft), and then completed drilling a new-wellbore (EE-2A) to a total depth of 3.78 km (12,360 ft). As a consequence of this drilling experience, Los Alamos believes that if the original wells were redrilled today their combined cost would be only $8 million rather than the $18.8 million actually spent (a 60% cost saving). Further details, particularly of the completion of the well, can be found in the major section, ACCOMPLISHMENTS, but it can be seen that the second, Level II objective is already nearing attainment.

Dash, Zora V.; Murphy, Hugh D.; Smith, Morton C.

1988-01-01T23:59:59.000Z

125

HDR geothermal energy  

Science Journals Connector (OSTI)

HDR geothermal energy, petrothermal geothermal energy, Hot Dry Rock energy ? Hot-Dry-Rock Energie f, (geothermische) HDR-Energie, petrothermale geothermische Energie f, petrothermale Geothermie [Gege...

2014-08-01T23:59:59.000Z

126

petrothermal geothermal energy  

Science Journals Connector (OSTI)

petrothermal geothermal energy, HDR geothermal energy, Hot Dry Rock energy ? Hot-Dry-Rock Energie f, (geothermische) HDR-Energie, petrothermale geothermische Energie f, petrothermale Geothermie [Gege...

2014-08-01T23:59:59.000Z

127

Geothermal Technologies | Open Energy Information  

Open Energy Info (EERE)

Geothermal Technologies Geothermal Technologies (Redirected from Geothermal Conversion Technologies) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Geothermal Technologies Geothermal energy can be utilized for electricity or heating in more than one way. Regardless of the energy conversion, geothermal energy requires heat(in the form of rock), water, and flow; and every resources will have different values for each. Some resources have very high temperature rock with high porosity (allowing for flow) but little to know water (see Enhanced Geothermal Systems (EGS). Some resources have plenty of water, great flow, but the temperatures are not very high which are commonly used for direct use. Any combination of those 3 things can be found in nature, and for that reason there are different classifications of geothermal

128

National Geothermal Data System Architecture Design, Testing and Maintenance  

Energy.gov (U.S. Department of Energy (DOE))

Project objective: To create the National Geothermal Data System (NGDS) comprised of a core and distributed network of databases and data sites that will comprise a federated system for acquisition, management, maintenance, and dissemination of geothermal and related data.

129

How to Utilize the National Geothermal Data System (NGDS) and...  

Energy Savers (EERE)

How to Utilize the National Geothermal Data System (NGDS) and Create Your Own Federated Data Network with "Node-In-A-Box" How to Utilize the National Geothermal Data System (NGDS)...

130

GTP Adds Meeting on the National Geothermal Data System Project...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Adds Meeting on the National Geothermal Data System Project to Peer Review GTP Adds Meeting on the National Geothermal Data System Project to Peer Review May 10, 2010 - 2:41pm...

131

MEMS Materials and Temperature Sensors for Down Hole Geothermal System Monitoring  

E-Print Network (OSTI)

and operation of geothermal power plants. US DOE EEREpercentage of geothermal electric power generation systemLow-enthalpy geothermal resources for power generation.

Wodin-Schwartz, Sarah

2013-01-01T23:59:59.000Z

132

Geographic Information System At International Geothermal Area, Indonesia  

Open Energy Info (EERE)

International Geothermal Area, Indonesia International Geothermal Area, Indonesia (Nash, Et Al., 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geographic Information System At International Geothermal Area Indonesia (Nash, Et Al., 2002) Exploration Activity Details Location International Geothermal Area Indonesia Exploration Technique Geographic Information System Activity Date Usefulness not indicated DOE-funding Unknown Notes GIs also facilitates grid data (raster) analysis and visualization. For example, a raster GIs layer, derived from an enhanced Landsat 7 Thematic Mapper (TM) image of the Karaha-Telaga Bodas area, Indonesia, is shown in Figure 2. References Gregory D. Nash, Christopher Kesler, Michael C. Adam (2002) Geographic Information Systems- Tools For Geotherm Exploration, Tracers

133

A Phase-Partitioning Model for CO2Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems  

E-Print Network (OSTI)

D.W. : A hot dry rock geothermal energy concept utilizinga renewed interest in geothermal energy, and particularly inThe Future of Geothermal Energy. (Massachusetts Institute of

Spycher, Nicolas; Pruess, Karsten

2010-01-01T23:59:59.000Z

134

Enhanced geothermal systems (EGS) using CO2 as working fluid - A novelapproach for generating renewable energy with simultaneous sequestration of carbon  

E-Print Network (OSTI)

Brown, D. A Hot Dry Rock Geothermal Energy Concept Utilizingand Renewable Energy, Office of Geothermal Technologies, ofThe resource base for geothermal energy is enormous, but

Pruess, Karsten

2006-01-01T23:59:59.000Z

135

A Phase-Partitioning Model for CO2Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems  

E-Print Network (OSTI)

D.W. : A hot dry rock geothermal energy concept utilizingThe Future of Geothermal Energy. (Massachusetts Institute ofa renewed interest in geothermal energy, and particularly in

Spycher, Nicolas; Pruess, Karsten

2010-01-01T23:59:59.000Z

136

Enhanced geothermal systems (EGS) using CO2 as working fluid - A novelapproach for generating renewable energy with simultaneous sequestration of carbon  

E-Print Network (OSTI)

Brown, D. A Hot Dry Rock Geothermal Energy Concept UtilizingThe resource base for geothermal energy is enormous, butproduction of geothermal energy is currently limited to

Pruess, Karsten

2006-01-01T23:59:59.000Z

137

Enhanced geothermal systems (EGS) with CO2 as heat transmission fluid--A scheme for combining recovery of renewable energy with geologic storage of CO2  

E-Print Network (OSTI)

D.W. A Hot Dry Rock Geothermal Energy Concept UtilizingThe Future of Geothermal Energy, Massachusetts Institute ofcombine recovery of geothermal energy with simultaneous

Pruess, K.

2010-01-01T23:59:59.000Z

138

Fluid Imaging of Enhanced Geothermal Systems | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Imaging of Enhanced Geothermal Systems Project objectives: Attempting to Image EGS Fracture & Fluid Networks; Employing joint Geophysical Imaging Technologies....

139

Geochemical characterization of geothermal systems in the Great...  

Open Energy Info (EERE)

insights into the possible contributions of geothermal systems to groundwater chemistry and development of mitigation strategies for attendant environmental issues....

140

Geothermal Energy Association Recognizes the National Geothermal Data System  

Energy.gov (U.S. Department of Energy (DOE))

The Geothermal Energy Association (GEA) announced today the winners of their 2014 GEA Honors, which recognizes companies, projects, and individuals who have demonstrated outstanding achievement in...

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Geothermal Energy Association Recognizes the National Geothermal...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Geothermal Energy Association Recognizes the National Geothermal Data System Geothermal Energy Association Recognizes the National Geothermal Data System July 29, 2014 - 8:20am...

142

The Patuha geothermal system: a numerical model of a vapor-dominated system.  

E-Print Network (OSTI)

??The Patuha geothermal system is a vapor-dominated reservoir located about 40 kilometers southwest of Bandung on western Java, Indonesia. The geothermal system consists of a (more)

Schotanus, M.R.J.

2013-01-01T23:59:59.000Z

143

Warren Estates-Manzanita Estates Reno, Nevada residential geothermal district heating system  

SciTech Connect

Warren Estates-Manzanita Estates is the largest privately-owned and operated residential geothermal district heating system in the State of Nevada. The system has operated for ten years and presently services 95 homes. Geothermal energy is used to heat homes, domestic water, spas, swimming pools, and greenhouses. Four homes have installed driveway deicing systems using geothermal energy. This paper briefly describes the geothermal resource, wells, system engineering, operation, applications, and economics. The accompanying posters illustrate the geothermal area, system design, and various applications. The resource is part of the Moana geothermal field, located in southwest Reno. Excluding the Warren-Manzanita Estates, the well-known Moana field supports nearly 300 geothermal wells that supply fluids to individual residences, several motels, a garden nursery, a few churches, and a municipal swimming pool. The Warren-Manzanita Estates is ideally suited for residential district space heating because the resource is shallow, moderate-temperature, and chemically benign. The primary reservoir rock is the Kate Peak andesite, a Tertiary volcanic lahar that has excellent permeability within the narrow fault zones that bisect the property. The Kate Peak formation is overlain by impermeable Tertiary lake sediments and alluvium. Two production wells, each about 240 m deep, are completed near the center of the residential development at the intersection of two fault zones. Geothermal fluids are pumped at a rate of 15 to 25 l/s (260-400 gpm) from one of two wells at a temperature of 95{degrees}C (202{degrees}F) to two flat-plate heat exchangers. The heat exchangers transfer energy from the geothermal fluids to a second fluid, much like a binary geothermal power plant.

McKay, F.; McKay, G.; McKay, S.; Flynn, T. [McKay Pump and Drilling, Reno, NV (United States)

1995-12-31T23:59:59.000Z

144

IKEA's New Store in Colorado to Feature Geothermal System | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Articles Blue flame generated by natural gas. Geek-Up08.27.10 -- Geothermal Stores, Graphene Loops, Nozzle Technology and the 1918 El Nio Geothermal Heating and Cooling Systems...

145

FY 1996 Summary of Hot Dry Rock Geothermal Power Project  

SciTech Connect

The report describes progress and status of the HDR project at Hijiori. The year was notable for a flow enhancement test of a system with two production wells in operation. Other items include a geochemical survey, reinterpretation of acoustic emission data from 1988 through 1995, borehole measurements to find intersections with fractures, a geological survey, preparation for modeling fractures, improvements in crack simulation in a reservoir analysis model, and environmental survey work. (DJE 2005)

None

1996-12-31T23:59:59.000Z

146

Development of Exploration Methods for Engineered Geothermal Systems  

Open Energy Info (EERE)

Exploration Methods for Engineered Geothermal Systems Exploration Methods for Engineered Geothermal Systems Through Integrated Geophysical, Geologic and Geochemical Interpretation the Seismic Analysis Component Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Development of Exploration Methods for Engineered Geothermal Systems Through Integrated Geophysical, Geologic and Geochemical Interpretation the Seismic Analysis Component Authors Ileana M. Tibuleac, Joe Iovenitti, David von Seggern, Jon Sainsbury, Glenn Biasi and John G. Anderson Conference Stanford Geothermal Conference; Stanford University; 2013 Published PROCEEDINGS, Thirty-Eighth Workshop on Geothermal Reservoir Engineering Stanford University;, 2013 DOI Not Provided Check for DOI availability: http://crossref.org

147

Geothermal drilling technology update  

SciTech Connect

Sandia National Laboratories conducts a comprehensive geothermal drilling research program for the US Department of Energy, Office of Geothermal Technologies. The program currently includes seven areas: lost circulation technology, hard-rock drill bit technology, high-temperature instrumentation, wireless data telemetry, slimhole drilling technology, Geothermal Drilling Organization (GDO) projects, and drilling systems studies. This paper describes the current status of the projects under way in each of these program areas.

Glowka, D.A.

1997-04-01T23:59:59.000Z

148

College of Idaho Geothermal System, Caldwell, Idaho  

SciTech Connect

There appears to be a good potential for a 160{sup 0}F resource at the College of Idaho site. Both existing well data and recent geologic and hydrologic investigations suggest that such a temperature should be available at a depth of approximately 3500 feet. Use of a temperature in the 160{sup 0}F range would not permit a 100% displacement of present natural gas use for space and domestic hot water. Because these systems were typically designed for 200{sup 0}F water or low pressure steam (approx. 220{sup 0}F), the performance of the existing equipment would be less than peak building requirements. However, even without major system modifications (the cost of which would be unreasonable), a geothermal system based on the above resource temperature would be capable of displacing about 78% of current natural gas consumption attributable to space and domestic hot water heating. The system outlined in the report would consist of a 3500 foot production well which would supply geothermal fluid to 12 major buildings on campus. Geothermal water would be passed through heat exchangers in each building. The heat exchangers would deliver heat to the existing heating loops. Most buildings would still require a small amount of input from the existing boiler during the coldest periods of the year. After having passed through the system, the geothermal water would then be injected into a disposal well. This is a key factor in the overall economics of the system. The assumption has been made that a full depth (3550 foot) injection well would be required. It is possible, though unclear at this point, that injection could be accomplished at a shallower depth into a similar aquifer. Since the injection well amounts to 24% of the total system capital cost, this is an important factor.

Rafferty, K.

1984-10-01T23:59:59.000Z

149

Geothermal Heating and Cooling Systems Featured on NBC Nightly...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

cooling systems that are providing 30%-70% energy and cost savings for homeowners in Jordan, New York. Demand for these systems is growing; nationally, shipments of geothermal...

150

Enhanced Geothermal Systems (EGS) with CO2as Heat Transmission...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

precipitation with spatial and temporal flow variations in CO2brinerock systems Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal Systems (EGS)...

151

Performance of Deep Geothermal Energy Systems .  

E-Print Network (OSTI)

??Geothermal energy is an important source of clean and renewable energy. This project deals with the study of deep geothermal power plants for the generation (more)

Manikonda, Nikhil

2012-01-01T23:59:59.000Z

152

Behavior Of Rare Earth Element In Geothermal Systems, A New  

Open Energy Info (EERE)

Behavior Of Rare Earth Element In Geothermal Systems, A New Behavior Of Rare Earth Element In Geothermal Systems, A New Exploration-Exploitation Tool Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Behavior Of Rare Earth Element In Geothermal Systems, A New Exploration-Exploitation Tool Details Activities (32) Areas (17) Regions (0) Abstract: The goal of this four-year project was to provide a database by which to judge the utility of the rare earth elements (REE) in the exploration for and exploitation of geothermal fields in the United States. Geothermal fluids from hot springs and wells have been sampled from a number of locations, including: (1) the North Island of New Zealand (1 set of samples); (2) the Cascades of Oregon; (3) the Harney, Alvord Desert and Owyhee geothermal areas of Oregon; (4) the Dixie Valley and Beowawe fields

153

Prediction of Scaling in Geothermal Systems  

SciTech Connect

One of the main objectives of the DOE Geothermal Program is to improve the efficiency and reliability of geothermal operations so that this renewable form of energy can be integrated into the nation's energy system. Scale formation and other chemical problems associated with energy extraction from high temperature brines frequently inhibit the economical utilization of geothermal resources. In some cases, these chemical problems can be so severe that development of a site must be abandoned after considerable capital investment. The goal of our research efforts is to construct an accurate computer model for describing the chemical behavior of geothermal brines under a wide range of operating conditions. This technology will provide industry a cost-effective means of identifying scaling problems in production and reinjection wells as well as in surface equipment, and also devising and testing methods for well as other uses described in table (1) can contribute significantly to meeting the objectives of the Geothermal Program. The chemical model we have developed to date can simulate calcium carbonate scale formation and gas solubilities in concentrated brines containing sodium, potassium, calcium, chloride and sulfate ions as a function of temperature to 250 C and for variable partial pressure of CO{sub 2}. It can predict the solubility of other scale-forming minerals, such as amorphous silica, gypsum-anhydrite, halite and glasserite, as a function of brine composition to 250 C. The only required input for the model is the temperature, pressure and composition of the brine. Our modeling approach is based on semi-empirical thermodynamic descriptions of aqueous solutions. The model equations are parameterized by careful comparison to a variety of laboratory data. The ability of the resulting models to accurately predict the chemical behavior of even very concentrated high temperature brines is well demonstrated. This ability is an unusual feature of our models which is vital for applications to many important geothermal systems, such as those found in the Imperial Valley of California. In this report, the use of the present version of our model will be illustrated by an application to the prediction of the onset of two phase flow (breakout) in a brine confined by an external pressure. Calculations of this kind are important in assessing the production potential of a geothermal resource because the initiation of breakout in a well bore or power plant is usually simultaneous with the appearance of massive scale deposition. It is therefore necessary to predict breakout and also to assess the consequences of breakout in designing more efficient energy extraction processes. For the geothermal brine for which we have reliable composition and breakout data (East Mesa in California), the model gives results which are essentially identical to the measured values. Calculations also illustrate the importance of contributions of dissolved gases to the total pressure of the brines. Applications to other scale formation problems in Dixie Valley geothermal brines will also be discussed.

Weare, John H.; Moller, Nancy E.

1989-03-21T23:59:59.000Z

154

GEOTHERMAL Events | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GEOTHERMAL Events GEOTHERMAL Events April 2018 < prev next > Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Low-Temperature &...

155

GEOTHERMAL Events | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GEOTHERMAL Events GEOTHERMAL Events May 2018 < prev next > Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Low-Temperature &...

156

GEOTHERMAL Events | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GEOTHERMAL Events GEOTHERMAL Events March 2018 < prev next > Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Low-Temperature &...

157

GEOTHERMAL Events | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GEOTHERMAL Events GEOTHERMAL Events February 2018 < prev next > Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Low-Temperature &...

158

GEOTHERMAL Events | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GEOTHERMAL Events GEOTHERMAL Events January 2018 < prev next > Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Low-Temperature &...

159

Numerical Modelling of Geothermal Systems a Short Introduction | Open  

Open Energy Info (EERE)

Numerical Modelling of Geothermal Systems a Short Introduction Numerical Modelling of Geothermal Systems a Short Introduction Jump to: navigation, search OpenEI Reference LibraryAdd to library General: Numerical Modelling of Geothermal Systems a Short Introduction Authors Mauro Cacace, Björn Onno Kaiser and Yvonne Cherubini Published Helmholtz Association, The date "N/A" was not understood.The date "N/A" was not understood. DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Numerical Modelling of Geothermal Systems a Short Introduction Citation Mauro Cacace,Björn Onno Kaiser,Yvonne Cherubini. N/A. Numerical Modelling of Geothermal Systems a Short Introduction. N/A. Helmholtz Association. N/Ap. Retrieved from "http://en.openei.org/w/index.php?title=Numerical_Modelling_of_Geothermal_Systems_a_Short_Introduction&oldid=688986"

160

Ball State building massive geothermal system | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Ball State building massive geothermal system Ball State building massive geothermal system Ball State building massive geothermal system March 19, 2010 - 5:47pm Addthis Workers drill boreholes for a geothermal heating and cooling system at Ball State University’s campus in Muncie, Ind. | Photo courtesy of Ball State University Workers drill boreholes for a geothermal heating and cooling system at Ball State University's campus in Muncie, Ind. | Photo courtesy of Ball State University Paul Lester Communications Specialist for the Office of Energy Efficiency and Renewable Energy Ball State University is building America's largest ground source district geothermal heating and cooling system. The new operation will save the school millions of dollars, slash greenhouse gases and create jobs. The project will also "expand how America will define the use of

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Ball State building massive geothermal system | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Ball State building massive geothermal system Ball State building massive geothermal system Ball State building massive geothermal system March 19, 2010 - 5:47pm Addthis Workers drill boreholes for a geothermal heating and cooling system at Ball State University’s campus in Muncie, Ind. | Photo courtesy of Ball State University Workers drill boreholes for a geothermal heating and cooling system at Ball State University's campus in Muncie, Ind. | Photo courtesy of Ball State University Paul Lester Communications Specialist, Office of Energy Efficiency and Renewable Energy Ball State University is building America's largest ground source district geothermal heating and cooling system. The new operation will save the school millions of dollars, slash greenhouse gases and create jobs. The project will also "expand how America will define the use of

162

Numerical Modeling Of Basin And Range Geothermal Systems | Open Energy  

Open Energy Info (EERE)

Numerical Modeling Of Basin And Range Geothermal Systems Numerical Modeling Of Basin And Range Geothermal Systems Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Numerical Modeling Of Basin And Range Geothermal Systems Details Activities (3) Areas (3) Regions (0) Abstract: Basic qualitative relationships for extensional geothermal systems that include structure, heat input, and permeability distribution have been established using numerical models. Extensional geothermal systems, as described in this paper, rely on deep circulation of groundwater rather than on cooling igneous bodies for heat, and rely on extensional fracture systems to provide permeable upflow paths. A series of steady-state, two-dimensional simulation models is used to evaluate the effect of permeability and structural variations on an idealized, generic

163

Geochemical characterization of geothermal systems in the Great Basin:  

Open Energy Info (EERE)

characterization of geothermal systems in the Great Basin: characterization of geothermal systems in the Great Basin: Implications for exploration, exploitation, and environmental issues Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Geochemical characterization of geothermal systems in the Great Basin: Implications for exploration, exploitation, and environmental issues Details Activities (0) Areas (0) Regions (0) Abstract: The objective of this ongoing project is the development of a representative geochemical database for a comprehensive range of elemental and isotopic parameters (i.e., beyond the typical data suite) for a range of geothermal systems in the Great Basin. Development of this database is one of the first steps in understanding the nature of geothermal systems in the Great Basin. Of particular importance in the Great Basin is utilizing

164

Geographic Information Systems- Tools For Geotherm Exploration, Tracers  

Open Energy Info (EERE)

Systems- Tools For Geotherm Exploration, Tracers Systems- Tools For Geotherm Exploration, Tracers Data Analysis, And Enhanced Data Distribution, Visualization, And Management Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Geographic Information Systems- Tools For Geotherm Exploration, Tracers Data Analysis, And Enhanced Data Distribution, Visualization, And Management Details Activities (4) Areas (3) Regions (0) Abstract: Geographic information systems (GIS) are an underused resource that can help the geothermal industry in exploration, tracer analysis, infrastructure management, and the general distribution and use of data. GIS systems are highly customizable to specific user needs and can use entire corporate data sets through a visual interface. This paper briefly documents the use of GIS in specific examples of geothermal research at the

165

Characterization of a geothermal system in the Upper Arkansas...  

Open Energy Info (EERE)

Paper: Characterization of a geothermal system in the Upper Arkansas Valley Authors T. Blum, K. van Wijk, L. Liberty, M. Batzle, R. Krahenbuhl, A. Revil and R. Reynolds...

166

Creation of an Enhanced Geothermal System through Hydraulic and...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

an Enhanced Geothermal System on the margin of the Coso field through the hydraulic, thermal, andor chemical stimulation of one or more tight injection wells; to increase the...

167

Geothermal: Sponsored by OSTI -- NREL's System Advisor Model...  

Office of Scientific and Technical Information (OSTI)

NREL's System Advisor Model Simplifies Complex Energy Analysis (Fact Sheet) Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On HomeBasic...

168

Geographic Information System At Dixie Valley Geothermal Area...  

Open Energy Info (EERE)

Details Location Dixie Valley Geothermal Area Exploration Technique Geographic Information System Activity Date 1996 - 1997 Usefulness not indicated DOE-funding Unknown...

169

Geographic Information System At Chena Geothermal Area (Holdmann...  

Open Energy Info (EERE)

Activity Details Location Chena Geothermal Area Exploration Technique Geographic Information System Activity Date 2005 - 2007 Usefulness useful DOE-funding Unknown Exploration...

170

Flathead Electric Cooperative Facility Geothermal Heat Pump System Upgrade  

Energy.gov (U.S. Department of Energy (DOE))

Project Will Take Advantage of Abundant Water in Shallow Aquifer. Demonstrate Low Temperature GSHP System Design. Provides a Baseline for Local Industrial Geothermal Project Costs and Benefits.

171

Fracture Characterization in Enhanced Geothermal Systems by Wellbore...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5 4.6.4 Fracture Characterization in Enhanced Geothermal Systems by Wellbore and Reservoir Analysis Presentation Number: 031 Investigator: Horne, Roland (Stanford University)...

172

Enhanced Geothermal System (EGS) Fact Sheet | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

System at the Northwest Geysers Geothermal Field, California EA-1733: Final Environmental Assessment Fracture Evolution Following a Hydraulic Stimulation within an EGS Reservoir...

173

Final Report: Enhanced Geothermal Systems Technology Phase II...  

Open Energy Info (EERE)

Valley, New Mexico Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Final Report: Enhanced Geothermal Systems Technology Phase II: Animas Valley, New...

174

High-Temperature-High-Volume Lifting for Enhanced Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

High-Temperature-High-Volume Lifting for Enhanced Geothermal Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

175

National Geothermal Data System (NGDS) Fact Sheet | Department...  

Energy Savers (EERE)

information that contains enough raw data points to pinpoint the elusive sweet spots of geothermal energy. NGDS is an interoperable networked system of distributed data...

176

Geothermal: Sponsored by OSTI -- Generic Natural Systems Evaluation...  

Office of Scientific and Technical Information (OSTI)

Generic Natural Systems Evaluation - Thermodynamic Database Development and Data Management Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log...

177

Experience with the Development of Advanced Materials for Geothermal Systems  

SciTech Connect

This chapter contains the following sections: Introduction, Advanced Cements, Materials Research and Development in Enhanced Geothermal Systems (EGS), Advanced Coatings, and Conclusions.

Sugama, T.; Butcher, T.; Ecker, L.

2011-01-01T23:59:59.000Z

178

IEA-GIA ExCo - National Geothermal Data System and Online Tools...  

Energy Savers (EERE)

IEA-GIA ExCo - National Geothermal Data System and Online Tools IEA-GIA ExCo - National Geothermal Data System and Online Tools National Geothermal Data System presentation by Jay...

179

EA-1893: Canby Cascaded Geothermal Development System, Canby, California |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

93: Canby Cascaded Geothermal Development System, Canby, 93: Canby Cascaded Geothermal Development System, Canby, California EA-1893: Canby Cascaded Geothermal Development System, Canby, California Summary This EA will evaluate the environmental impacts of a proposal by Modoc Contracting Company to use DOE grant funds to fulfill its plan to expand its reliance on geothermal resources by producing more hot water and using it to produce power as well as thermal energy. The goal of the project is to complete a cascaded geothermal system that generates green power for the local community, provides thermal energy to support greenhouse and aquaculture operation, provide sustainable thermal energy for residential units, and eliminate the existing geothermal discharge to a local river. NOTE: NOTE: This EA has been cancelled.

180

GEOLOGY AND HYDROTHERMAL ALTERATION OF THE RAFT RIVER GEOTHERMAL SYSTEM,  

Open Energy Info (EERE)

GEOLOGY AND HYDROTHERMAL ALTERATION OF THE RAFT RIVER GEOTHERMAL SYSTEM, GEOLOGY AND HYDROTHERMAL ALTERATION OF THE RAFT RIVER GEOTHERMAL SYSTEM, IDAHO Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: GEOLOGY AND HYDROTHERMAL ALTERATION OF THE RAFT RIVER GEOTHERMAL SYSTEM, IDAHO Details Activities (3) Areas (1) Regions (0) Abstract: The Raft River geothermal system is located in southern Idaho, near the Utah-Idaho state boarder in the Raft River Valley. The field, which is owned and operated by U.S. Geothermal, has been selected as an EGS demonstration site by the U. S. Department of Energy. This paper summarizes ongoing geologic and petrologic investigations being conducted in support of this project. The reservoir is developed in fractured Proterozoic schist and quartzite, and Archean quartz monzonite cut by younger diabase

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Geothermal Resource Analysis and Structure of Basin and Range Systems,  

Open Energy Info (EERE)

Analysis and Structure of Basin and Range Systems, Analysis and Structure of Basin and Range Systems, Especially Dixie Valley Geothermal Field, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Geothermal Resource Analysis and Structure of Basin and Range Systems, Especially Dixie Valley Geothermal Field, Nevada Authors David D. Blackwell, Kenneth W. Wisian, Maria C. Richards, Mark Leidig, Richard Smith and Jason McKenna Published U.S. Department of Energy, 2003 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Geothermal Resource Analysis and Structure of Basin and Range Systems, Especially Dixie Valley Geothermal Field, Nevada Citation David D. Blackwell,Kenneth W. Wisian,Maria C. Richards,Mark Leidig,Richard Smith,Jason McKenna. 2003. Geothermal Resource Analysis and Structure of

182

National Geothermal Data System: Transforming the Discovery, Access, and Analytics of Data for Geothermal Exploration  

SciTech Connect

Compendium of Papers from the 38th Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California February 11-13, 2013 The National Geothermal Data System (NGDS) is a distributed, interoperable network of data collected from state geological surveys across all fifty states and the nations leading academic geothermal centers. The system serves as a platform for sharing consistent, reliable, geothermal-relevant technical data with users of all types, while supplying tools relevant for their work. As aggregated data supports new scientific findings, this content-rich linked data ultimately broadens the pool of knowledge available to promote discovery and development of commercial-scale geothermal energy production. Most of the up-front risks associated with geothermal development stem from exploration and characterization of subsurface resources. Wider access to distributed data will, therefore, result in lower costs for geothermal development. NGDS is on track to become fully operational by 2014 and will provide a platform for custom applications for accessing geothermal relevant data in the U.S. and abroad. It is being built on the U.S. Geoscience Information Network (USGIN) data integration framework to promote interoperability across the Earth sciences community. The basic structure of the NGDS employs state-of-the art informatics to advance geothermal knowledge. The following four papers comprising this Open-File Report are a compendium of presentations, from the 38th Annual Workshop on Geothermal Reservoir Engineering, taking place February 11-13, 2013 at Stanford University, Stanford, California. NGDS Geothermal Data Domain: Assessment of Geothermal Community Data Needs, outlines the efforts of a set of nationwide data providers to supply data for the NGDS. In particular, data acquisition, delivery, and methodology are discussed. The paper addresses the various types of data and metadata required and why simple links to existing data are insufficient for promoting geothermal exploration. Authors of this paper are Arlene Anderson, US DOE Geothermal Technologies Office, David Blackwell, Southern Methodist University (SMU), Cathy Chickering (SMU), Toni Boyd, Oregon Institute of Technologys GeoHeat Center, Roland Horne, Stanford University, Matthew MacKenzie, Uberity, Joe Moore, University of Utah, Duane Nickull, Uberity, Stephen Richard, Arizona Geological Survey, and Lisa Shevenell, University of Nevada, Reno. NGDS User Centered Design: Meeting the Needs of the Geothermal Community, discusses the user- centered design approach taken in the development of a user interface solution for the NGDS. The development process is research based, highly collaborative, and incorporates state-of-the-art practices to ensure a quality user interface for the widest and greatest utility. Authors of this paper are Harold Blackman, Boise State University, Suzanne Boyd, Anthro-Tech, Kim Patten, Arizona Geological Survey, and Sam Zheng, Siemens Corporate Research. Fueling Innovation and Adoption by Sharing Data on the DOE Geothermal Data Repository Node on the National Geothermal Data System, describes the motivation behind the development of the Geothermal Data Repository (GDR) and its role in the NGDS. This includes the benefits of using the GDR to share geothermal data of all types and DOEs data submission process. Authors of this paper are Jon Weers, National Renewable Energy Laboratory and Arlene Anderson, US DOE Geothermal Technologies Office. Finally, Developing the NGDS Adoption of CKAN for Domestic & International Data Deployment, provides an overview of the Node-In-A-Box software package designed to provide data consumers with a highly functional interface to access the system, and to ease the burden on data providers who wish to publish data in the system. It is important to note that this software package constitutes a reference implementation and that the NGDS architecture is based on open standards, which means other server software can make resources available, a

Patten, Kim [Arizona Geological Survey

2013-05-01T23:59:59.000Z

183

Understanding The Chena Hot Springs, Alaska, Geothermal System Using  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Understanding The Chena Hot Springs, Alaska, Geothermal System Using Temperature And Pressure Data From Exploration Boreholes Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Understanding The Chena Hot Springs, Alaska, Geothermal System Using Temperature And Pressure Data From Exploration Boreholes Details Activities (7) Areas (1) Regions (0) Abstract: Chena Hot Springs is a small, moderate temperature, deep circulating geothermal system, apparently typical of those associated to hot springs of interior Alaska. Multi-stage drilling was used in some

184

Conceptual design of a geothermal site development forecasting system  

SciTech Connect

A site development forecasting system has been designed in response to the need to monitor and forecast the development of specific geothermal resource sites for electrical power generation and direct heat applications. The system is comprised of customized software, a site development status data base, and a set of complex geothermal project development schedules. The system would use site-specific development status information obtained from the Geothermal Progress Monitor and other data derived from economic and market penetration studies to produce reports on the rates of geothermal energy development, federal agency manpower requirements to ensure these developments, and capital expenditures and technical/laborer manpower required to achieve these developments.

Neham, E.A.; Entingh, D.J.

1980-03-01T23:59:59.000Z

185

Geophysical Characterization of a Geothermal System Neal Hot Springs,  

Open Energy Info (EERE)

Characterization of a Geothermal System Neal Hot Springs, Characterization of a Geothermal System Neal Hot Springs, Oregon, USA Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Geophysical Characterization of a Geothermal System Neal Hot Springs, Oregon, USA Abstract Neal Hot Springs is an active geothermal area that is also the proposed location of a binary power plant, which is being developed by US Geothermal Inc. To date, two production wells have been drilled and an injection well is in the process of being completed. The primary goal of this field camp was to provide a learning experience for students studying geophysics, but a secondary goal was to characterize the Neal Hot Springs area to provide valuable information on the flow of geothermal fluids through the subsurface. This characterization was completed using a variety of

186

Geothermal Resource Analysis And Structure Of Basin And Range Systems,  

Open Energy Info (EERE)

Analysis And Structure Of Basin And Range Systems, Analysis And Structure Of Basin And Range Systems, Especially Dixie Valley Geothermal Field, Nevada Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Geothermal Resource Analysis And Structure Of Basin And Range Systems, Especially Dixie Valley Geothermal Field, Nevada Details Activities (12) Areas (5) Regions (0) Abstract: Publish new thermal and drill data from the Dizie Valley Geothermal Field that affect evaluation of Basin and Range Geothermal Resources in a very major and positive way. Completed new geophysical surveys of Dizie Valley including gravity and aeromagnetics and integrated the geophysical, seismic, geological and drilling data at Dizie Valley into local and regional geologic models. Developed natural state mass and energy

187

Geochemistry Of The Lake City Geothermal System, California, Usa | Open  

Open Energy Info (EERE)

Geochemistry Of The Lake City Geothermal System, California, Usa Geochemistry Of The Lake City Geothermal System, California, Usa Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Geochemistry Of The Lake City Geothermal System, California, Usa Details Activities (2) Areas (1) Regions (0) Abstract: Lake City hot springs and geothermal wells chemically fall into a narrow compositional group. This indicates that, with the exception of a few hot springs, mixing with shallow cold ground waters does not have a significant influence on the chemistry of the hot springs. Narrow ranges in plots of F, B and Li versus Cl, and _D to _18O values indicate minimal mixing. Because of this, the compositions of the natural hot spring waters are fairly representative of the parent geothermal water. The average

188

Geothermal system saving money at fire station | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Geothermal system saving money at fire station Geothermal system saving money at fire station Geothermal system saving money at fire station April 9, 2010 - 3:45pm Addthis Joshua DeLung What will the project do? A geothermal heating and cooling system has enabled the substation to save taxpayers $15,000 annually when compared to a traditional system. The high temperature of the treatment building's water helps reduce the amount of energy needed to heat water in the substation. An environmentally friendly geothermal heating and cooling system in Pennsylvania will save taxpayers $15,000 a year as part of a new fire substation that will decrease emergency response times. The Alpha Fire Co. celebrated the opening of substation on the ground floor of the College Township municipal building earlier this year in State

189

Characteristics of Basin and Range Geothermal Systems with Fluid  

Open Energy Info (EERE)

Characteristics of Basin and Range Geothermal Systems with Fluid Characteristics of Basin and Range Geothermal Systems with Fluid Temperatures of 150°C to 200°C Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Characteristics of Basin and Range Geothermal Systems with Fluid Temperatures of 150°C to 200°C Abstract Six geothermal reservoirs with fluid temperatures over 200°C and ten geothermal systems with measured fluid temperatures of 150-200°C have been discovered in the northern Basin and Range Province of the USA. A comparison of these high and moderate temperature systems shows considerable overlap in geographical distribution, geology, and physical properties. Our ability to distinguish between moderate and high temperature systems using fluid chemistry has been limited by often

190

Blind Geothermal System Exploration in Active Volcanic Environments;  

Open Energy Info (EERE)

System Exploration in Active Volcanic Environments; System Exploration in Active Volcanic Environments; Multi-phase Geophysical and Geochemical Surveys in Overt and Subtle Volcanic Systems, Hawaii and Maui Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Blind Geothermal System Exploration in Active Volcanic Environments; Multi-phase Geophysical and Geochemical Surveys in Overt and Subtle Volcanic Systems, Hawai'i and Maui Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Validation of Innovative Exploration Technologies Project Description The project will perform a suite of stepped geophysical and geochemical surveys and syntheses at both a known, active volcanic system at Puna, Hawai'i and a blind geothermal system in Maui, Hawai'i. Established geophysical and geochemical techniques for geothermal exploration including gravity, major cations/anions and gas analysis will be combined with atypical implementations of additional geophysics (aeromagnetics) and geochemistry (CO2 flux, 14C measurements, helium isotopes and imaging spectroscopy). Importantly, the combination of detailed CO2 flux, 14C measurements and helium isotopes will provide the ability to directly map geothermal fluid upflow as expressed at the surface. Advantageously, the similar though active volcanic and hydrothermal systems on the east flanks of Kilauea have historically been the subject of both proposed geophysical surveys and some geochemistry; the Puna Geothermal Field (Puna) (operated by Puna Geothermal Venture [PGV], an Ormat subsidiary) will be used as a standard by which to compare both geophysical and geochemical results.

191

Strategies To Detect Hidden Geothermal Systems Based On Monitoring and  

Open Energy Info (EERE)

To Detect Hidden Geothermal Systems Based On Monitoring and To Detect Hidden Geothermal Systems Based On Monitoring and Analysis Of CO2 In The Near-Surface Environment Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Strategies To Detect Hidden Geothermal Systems Based On Monitoring and Analysis Of CO2 In The Near-Surface Environment Details Activities (5) Areas (1) Regions (0) Abstract: We investigate the potential for CO2 monitoring in thenear-surface environment as an approach to exploration for hiddengeothermal systems. Numerical simulations of CO2 migration from a modelhidden geothermal system show that CO2 concentrations can reach highlevels in the shallow subsurface even for relatively low CO2 fluxes.Therefore, subsurface measurements offer an advantage over above-groundmeasurements which are affected by winds that rapidly disperse

192

Behavior of Rare Earth Elements in Geothermal Systems- A New  

Open Energy Info (EERE)

Behavior of Rare Earth Elements in Geothermal Systems- A New Behavior of Rare Earth Elements in Geothermal Systems- A New Exploration/Exploitation Tool? Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Behavior of Rare Earth Elements in Geothermal Systems- A New Exploration/Exploitation Tool? Abstract N/A Author Department of Geology and Geological Engineering niversity of Idaho Published Publisher Not Provided, 2001 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Behavior of Rare Earth Elements in Geothermal Systems- A New Exploration/Exploitation Tool? Citation Department of Geology and Geological Engineering niversity of Idaho. 2001. Behavior of Rare Earth Elements in Geothermal Systems- A New Exploration/Exploitation Tool?. (!) : (!) . Retrieved from

193

Development of Exploration Methods for Engineered Geothermal Systems  

Open Energy Info (EERE)

Development of Exploration Methods for Engineered Geothermal Systems Development of Exploration Methods for Engineered Geothermal Systems through Integrated Geophysical, Geologic and Geochemical Interpretation Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Development of Exploration Methods for Engineered Geothermal Systems through Integrated Geophysical, Geologic and Geochemical Interpretation Abstract N/A Author U.S. Department of Energy Published Publisher Not Provided, Date Not Provided DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Development of Exploration Methods for Engineered Geothermal Systems through Integrated Geophysical, Geologic and Geochemical Interpretation Citation U.S. Department of Energy. Development of Exploration Methods for Engineered Geothermal Systems through Integrated Geophysical, Geologic and

194

Assessment of Favorable Structural Settings of Geothermal Systems in the  

Open Energy Info (EERE)

Assessment of Favorable Structural Settings of Geothermal Systems in the Assessment of Favorable Structural Settings of Geothermal Systems in the Great Basin, Western USA Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Assessment of Favorable Structural Settings of Geothermal Systems in the Great Basin, Western USA Abstract We have undertaken a thorough inventory of the structural settings of known geothermal systems (>400 total) in the extensional to transtensional terrane of the Great Basin in the western USA. Of the more than 200 geothermal fields catalogued to date, we found that step-overs or relay ramps in normal fault zones served as the most favorable structural setting, hosting ~32% of the systems. Such areas are characterized by multiple, commonly overlapping fault strands, increased fracture density,

195

Temperature histories in geothermal wells: survey of rock thermomechanical properties and drilling, production, and injection case studies  

SciTech Connect

Thermal and mechanical properties for geothermal formations are tabulated for a range of temperatures and stress conditions. Data was obtained from the technical literature and direct contacts with industry. Thermal properties include heat capacity, conductivity, and diffusivity. Undisturbed geothermal profiles are also presented. Mechanical properties include Youngs modulus and Poisson ratio. GEOTEMP thermal simulations of drilling, production and injection are reported for two geothermal regions, the hot dry rock area near Los Alamos and the East Mesa field in the Imperial Valley. Actual drilling, production, and injection histories are simulated. Results are documented in the form of printed GEOTEMP output and plots of temperatures versus depth, radius, and time. Discussion and interpretation of the results are presented for drilling and well completion design to determine: wellbore temperatures during drilling as a function of depth; bit temperatures over the drilling history; cement temperatures from setting to the end of drilling; and casing and formation temperatures during drilling, production, and injection.

Goodman, M.A.

1981-07-01T23:59:59.000Z

196

Microcracks, residual strain, velocity, and elastic properties of igneous rocks from a geothermal test-hole at Fenton Hill, New Mexico  

E-Print Network (OSTI)

MICROCRACKS, RESIDUAL STRAIN, VELOCITY, AND ELASTIC PROPERTIES OF IGNEOUS ROCKS FRCM A GEOTHERMAL TEST-HOLE AT FENTON HILL, NEW MEXICO A Thesis JOHN DAVID CIAMPA Submitted to the Graduate College of Texas A8M University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE August 1980 Major Subject: Geophysics MICROCRACKS, RESIDUAL STRAIN, VELOCITY, AND ELASTIC PROPERTIES OF IGNEOUS ROCKS FROM A GEOTHERMAL TEST-HOLE AT FENTON HILL, NEW MEXICO A Thesis by JOHN DAVID CIAMPA...

Ciampa, John David

2012-06-07T23:59:59.000Z

197

The Krafla Geothermal System. A Review of Geothermal Research and Revision  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » The Krafla Geothermal System. A Review of Geothermal Research and Revision of the Conceptual Model Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: The Krafla Geothermal System. A Review of Geothermal Research and Revision of the Conceptual Model Authors Mortensen A.K., Gudmundsson Á., Steingrímsson B., Sigmundsson F., Axelsson G., Ármannsson H., Björnsson H., Ágústsson K., Saemundsson K., Ólafsson M., Karlsdóttir R., Halldórsdóttir S. and Hauksson T. Organization Iceland GeoSurvey Published Iceland GeoSurvey, 2009

198

Overview Of The Lake City, California Geothermal System | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Overview Of The Lake City, California Geothermal System Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Overview Of The Lake City, California Geothermal System Details Activities (1) Areas (1) Regions (0) Abstract: Following a spectacular mud volcano eruption in 1951, the Lake City geothermal system has been intermittently explored for 44 years. A discovery well was drilled 30 years ago. The geothermal system is associated with a two mile-long, north-south trending, abnormally complex section of the active Surprise Valley fault zone that has uplifted the

199

Energy Department Announces Up to $31 Million for Initial Phases of Enhanced Geothermal Systems Field Observatory  

Office of Energy Efficiency and Renewable Energy (EERE)

As part of the Administrations all-of-the-above energy strategy, the Energy Department today announced up to $31 million to establish the initial phases of the Frontier Observatory for Research in Geothermal Energy (FORGE), a field laboratory dedicated to cutting-edge research on enhanced geothermal systems (EGS). EGS are engineered reservoirs, created beneath the surface of the Earth, where there is hot rock but limited pathways through which fluid can flow. During EGS development, underground fluid pathways are safely created and their size and connectivity increased. These enhanced pathways allow fluid to circulate throughout the hot rock and carry heat to the surface to generate electricity. In the long term, EGS may enable domestic access to a geographically diverse baseload, and carbon-free energy resource on the order of 100 gigawatts, or enough to power about 100 million homes.

200

Geothermal Energy Program overview  

SciTech Connect

The mission of the Geothermal Energy Program is to develop the science and technology necessary for tapping our nation's tremendous heat energy sources contained with the Earth. Geothermal energy is a domestic energy source that can produce clean, reliable, cost- effective heat and electricity for our nation's energy needs. Geothermal energy -- the heat of the Earth -- is one of our nation's most abundant energy resources. In fact, geothermal energy represents nearly 40% of the total US energy resource base and already provides an important contribution to our nation's energy needs. Geothermal energy systems can provide clean, reliable, cost-effective energy for our nation's industries, businesses, and homes in the form of heat and electricity. The US Department of Energy's (DOE) Geothermal Energy Program sponsors research aimed at developing the science and technology necessary for utilizing this resource more fully. Geothermal energy originates from the Earth's interior. The hottest fluids and rocks at accessible depths are associated with recent volcanic activity in the western states. In some places, heat comes to the surface as natural hot water or steam, which have been used since prehistoric times for cooking and bathing. Today, wells convey the heat from deep in the Earth to electric generators, factories, farms, and homes. The competitiveness of power generation with lower quality hydrothermal fluids, geopressured brines, hot dry rock, and magma ( the four types of geothermal energy) still depends on the technical advancements sought by DOE's Geothermal Energy Program.

Not Available

1991-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Geothermal Progress Monitor: system status and operational experience  

SciTech Connect

The Geothermal Progress Monitor (GPM) is an information system designed and implemented by the MITRE Corporation on behalf of the Division of Geothermal and Hydropower Technology (DGHT, formerly Division of Geothermal Energy) of the US Department of Energy (DOE). Its purpose is to keep track of and to report significant events and trends in the US geothermal industry and the federal geothermal program. The information sources of the GPM system are paper and computerized files maintained by a number of organizations throughout the United States. Trade and technical publications are also used to supplement the information-gathering network. Periodic reports from the GPM system consist mainly of manual and computerized analyses of the collected data. In addition, significant events and activities are usually highlighted. The GPM serves a dual function for DGHT and other members of the Interagency Geothermal Coordinating Council (IGCC). It supports effective management of the federal geothermal program and it provides information for executive, legislative, statutory, and public needs. This paper is a report on the current status of the GPM system and a summary of MITRE's operational experience during calendar year 1981 and the first quarter of 1982. It includes a description of the required output and the mechanism by which the information is gathered, integrated, and published as a Geothermal Progress Monitor Report.

Gerstein, R.E.; Kenkeremath, L.D.; Murphy, M.B.; Entingh, D.J.

1982-03-01T23:59:59.000Z

202

State Geological Survey Contributions to the National Geothermal Data System  

Energy.gov (U.S. Department of Energy (DOE))

Project objectives: Deploy and populate the National Geothermal Data System (NGDS) with state-specific data by creating a national, sustainable, distributed, interoperable network of state geological survey-based data providers that will develop, collect, serve, and maintain geothermal-relevant data that operates as an integral compliant component of NGDS.

203

Regional Systems Development for Geothermal Energy Resources Pacific Region  

Open Energy Info (EERE)

Systems Development for Geothermal Energy Resources Pacific Region Systems Development for Geothermal Energy Resources Pacific Region (California and Hawaii). Task 3: water resources evaluation. Topical report Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Regional Systems Development for Geothermal Energy Resources Pacific Region (California and Hawaii). Task 3: water resources evaluation. Topical report Details Activities (1) Areas (1) Regions (0) Abstract: The fundamental objective of the water resources analysis was to assess the availability of surface and ground water for potential use as power plant make-up water in the major geothermal areas of California. The analysis was concentrated on identifying the major sources of surface and ground water, potential limitations on the usage of this water, and the

204

Chemical Geothermometers And Mixing Models For Geothermal Systems | Open  

Open Energy Info (EERE)

Geothermometers And Mixing Models For Geothermal Systems Geothermometers And Mixing Models For Geothermal Systems Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Chemical Geothermometers And Mixing Models For Geothermal Systems Details Activities (1) Areas (1) Regions (0) Abstract: Qualitative chemical geothermometers utilize anomalous concentrations of various "indicator" elements in groundwaters, streams, soils, and soil gases to outline favorable places to explore for geothermal energy. Some of the qualitative methods, such as the delineation of mercury and helium anomalies in soil gases, do not require the presence of hot springs or fumaroles. However, these techniques may also outline fossil thermal areas that are now cold. Quantitative chemical geothermometers and mixing models can provide information about present probable minimum

205

Large Scale Geothermal Exchange System for Residential, Office and Retail  

Open Energy Info (EERE)

Geothermal Exchange System for Residential, Office and Retail Geothermal Exchange System for Residential, Office and Retail Development Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Large Scale Geothermal Exchange System for Residential, Office and Retail Development Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 1: Technology Demonstration Projects Project Description RiverHeath will be a new neighborhood, with residences, shops, restaurants, and offices. The design incorporates walking trails, community gardens, green roofs, and innovative stormwater controls. A major component of the project is our reliance on renewable energy. One legacy of the land's industrial past is an onsite hydro-electric facility which formerly powered the paper factories. The onsite hydro is being refurbished and will furnish 100% of the project's electricity demand.

206

GRC Workshop: The Power of the National Geothermal Data System | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GRC Workshop: The Power of the National Geothermal Data System GRC Workshop: The Power of the National Geothermal Data System GRC Workshop: The Power of the National Geothermal Data System October 2, 2013 (All day) Flyer for the National Geothermal Data System workshop at the Geothermal Resources Council Annual Meeting on October 2, 2013 in Las Vegas. Drilling Down: How Legacy and New Research Data Can Advance Geothermal Development-The Power of the National Geothermal Data System (NGDS) A workshop at the Geothermal Resources Council Annual Meeting in Las Vegas, Nevada Abstract: The National Geothermal Data System's (NGDS) launch in 2014 will provide open access to millions of datasets, sharing technical geothermal-relevant data across the geosciences to propel geothermal development and production forward. By aggregating findings from the Energy Department's RD&D projects

207

Enhanced Geothermal Systems Webinar | Department of Energy  

Energy Savers (EERE)

Electric Cooperative Associate, Western Area Power Administration, and U.S. Department of Energy Geothermal Technologies Office. The Webinar covered topics including federal...

208

Enhanced Geothermal Systems Demonstration Projects | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

innovative technology development and deployment could facilitate access to 100+ GW of energy, exponentially more than today's current geothermal capacity. With EGS, we can tap...

209

Development of Enhanced Geothermal Systems Technologies Workshops...  

Energy Savers (EERE)

in the report by the Massachusetts Institute of Technology (MIT) titled The Future of Geothermal Energy (MIT 2006). Three of the presentations (in the areas of Reservoir...

210

Imaging the Soultz Enhanced Geothermal Reservoir using double-difference tomography and microseismic data  

E-Print Network (OSTI)

We applied the double-difference tomography method to image the P and S-wave velocity structure of the European Hot Dry Rock geothermal reservoir (also known as the Soultz Enhanced Geothermal System) at Soultz-sous-Forets, ...

Pieros Concha, Diego Alvaro

2010-01-01T23:59:59.000Z

211

Conceptual Models of Geothermal Systems - Introduction | Open Energy  

Open Energy Info (EERE)

Conceptual Models of Geothermal Systems - Introduction Conceptual Models of Geothermal Systems - Introduction Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Conceptual Models of Geothermal Systems - Introduction Abstract The key to the successful exploration, development (incl. drilling) and utilization of any type of geothermal system is a clear definition and understanding of the nature and characteristics of the system in question. This is best achieved through the development of a conceptual model of the system, which is a descriptive or qualitative model incorporating, and unifying, the essential physical features of the system. Conceptual models are mainly based on analysis of geological and geophysical information, temperature and pressure data, information on reservoir properties as well

212

An Archaean sub-seafloor geothermal system, calc-alkali' trends, and massive sulphide genesis  

Science Journals Connector (OSTI)

... only weakly hydrated during halmyrolysis and burial metamorphism, but, in some areas, sub-seafloor geothermal activity contemporaneous with volcanism produced more intense rock-water interaction with higher water-to-rock ... alkaline' traits reflect a hydrothermal overprint caused by rock-water interaction during sub-sea floor geothermal activity as a modified seawater brine intensely spili-tized, silicified and leached metals from ...

P. J. MacGeehan; W. H. MacLean

1980-08-21T23:59:59.000Z

213

Fluid Imaging of Enhanced Geothermal Systems through Joint 3D Geophysical  

Open Energy Info (EERE)

Imaging of Enhanced Geothermal Systems through Joint 3D Geophysical Imaging of Enhanced Geothermal Systems through Joint 3D Geophysical Inverse Modeling Geothermal Lab Call Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Fluid Imaging of Enhanced Geothermal Systems through Joint 3D Geophysical Inverse Modeling Project Type / Topic 1 Laboratory Call for Submission of Applications for Research, Development and Analysis of Geothermal Technologies Project Type / Topic 2 Fluid Imaging Project Description EGS has been defined as enhanced reservoirs that have been created to extract economical amounts of heat from low permeability and/or porosity geothermal resources. Critical to the success of EGS is the successful manipulation of fluids in the subsurface to enhance permeability. Knowledge in the change in volume and location of fluids in the rocks and fractures (both natural and induced) will be needed to manage injection strategies such as the number and location of step out wells, in-fill wells and the ratio of injection to production wells. The key difficulty in manipulating fluids has been our inability to reliably predict their locations, movements and concentrations. We believe combining data from MEQ and electrical surveys has the potential to overcome these problems and can meet many of the above needs, economically. Induced seismicity is currently viewed as one of the essential methods for inferring the success of creating fracture permeability and fluid paths during large scale EGS injections. Fluids are obviously playing a critical role in inducing the seismicity, however, other effects such as thermal, geochemical and stress redistribution, etc. may also play a role.

214

A Geothermal District-Heating System and Alternative Energy Research...  

Open Energy Info (EERE)

District-Heating System and Alternative Energy Research Park on the NM Tech Campus Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title A...

215

Geothermal Binary Power Generation System Using Unutilized Energy  

Science Journals Connector (OSTI)

Binary power generating system is based on the Rankine cycle with geothermal fluid as heating source and low boiling ... can generate electric power from low temperature (energy) source. Employing the binary powe...

Hiroaki Shibata; Hiroshi Oyama

2007-01-01T23:59:59.000Z

216

TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID...  

Open Energy Info (EERE)

TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID-INCLUSION GAS CHEMISTRY Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings:...

217

Chemical Impact of Elevated CO2on Geothermal Energy Production  

Energy.gov (U.S. Department of Energy (DOE))

This is a two phase project to assess the geochemical impact of CO2on geothermal energy production by: analyzing the geochemistry of existing geothermal fields with elevated natural CO2; measuring realistic rock-water rates for geothermal systems using laboratory and field-based experiments to simulate production scale impacts.

218

Identification of a New Blind Geothermal System with Hyperspectral Remote  

Open Energy Info (EERE)

Identification of a New Blind Geothermal System with Hyperspectral Remote Identification of a New Blind Geothermal System with Hyperspectral Remote Sensing and Shallow Temperature Measurements at Columbus Salt Marsh, Esmeralda County, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Identification of a New Blind Geothermal System with Hyperspectral Remote Sensing and Shallow Temperature Measurements at Columbus Salt Marsh, Esmeralda County, Nevada Abstract Hyperspectral remote sensing-derived mineral maps and follow-up shallow temperature measurements were used to identify a new blind geothermal target in the Columbus Salt Marsh playa, Esmeralda County, Nevada. The hyperspectral survey was conducted with the ProSpecTIR VS2 instrument and consists of 380 km2 of 4-meter spatial resolution data acquired on October

219

A Geochemical Model Of The Platanares Geothermal System, Honduras | Open  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » A Geochemical Model Of The Platanares Geothermal System, Honduras Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Geochemical Model Of The Platanares Geothermal System, Honduras Details Activities (0) Areas (0) Regions (0) Abstract: Results of exploration drilling combined with results of geologic, geophysical, and hydrogeochemical investigations have been used to construct a geochemical model of the Platanares geothermal system, Honduras. Three coreholes were drilled, two of which produced fluids from fractured Miocene andesite and altered Cretaceous to Eocene conglomerate at

220

Engineered Geothermal Systems Energy Return On Energy Investment  

NLE Websites -- All DOE Office Websites (Extended Search)

EGS EROI - 1 EGS EROI - 1 Engineered Geothermal Systems Energy Return On Energy Investment A.J. Mansure, Geothermal Consultant, ajm@q.com Albuquerque, NM 12/10/2012 Key Words: energy, EROI, EGS, efficiency, energy investment, energy return, input energy, energy payback, and net energy. Abstract Energy Return On Investment (EROI) is an important figure of merit for assessing the viability of energy alternatives. Too often comparisons of energy systems use "efficiency" when EROI would be more appropriate. For geothermal electric power generation, EROI is determined by the electricity delivered to the consumer compared to the energy consumed to construct, operate, and decommission the facility. Critical factors in determining the EROI of Engineered Geothermal Systems (EGS

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Baseline System Costs for 50.0 MW Enhanced Geothermal System--A Function of: Working Fluid, Technology, and Location, Location, Location  

Energy.gov (U.S. Department of Energy (DOE))

Project objectives: Develop a baseline cost model of a 50.0 MW Enhanced Geothermal System, including all aspects of the project, from finding the resource through to operation, for a particularly challenging scenario: the deep, radioactively decaying granitic rock of the Pioneer Valley in Western Massachusetts.

222

Economic Predictions for Heat Mining: A Review and Analysis of Hot Dry Rock (HDR) Geothermal Energy Technology  

SciTech Connect

The main objectives of this study were first, to review and analyze several economic assessments of Hot Dry Rock (HDR) geothermal energy systems, and second, to reformulate an economic model for HDR with revised cost components. The economic models reviewed include the following studies sponsored by Electric Power Research Institute (EPRI)-Cummings and Morris (1979), Los Alamos National Laboratory (LANL)-Murphy, et al. (1982), United Kingdom (UK)-Shock (1986), Japan-Hori, et al. (1986), Meridian-Entingh (1987) and Bechtel (1988). A general evaluation of the technical feasibility of HDR technology components was also conducted in view of their importance in establishing drilling and reservoir performance parameters required for any economic assessment. In this review, only economic projections for base load electricity produced from HDR systems were considered. Bases of 1989 collars ($) were selected to normalize costs. Following the evaluation of drilling and reservoir performance, power plant choices and cost estimates are discussed in section 6 of the report. In Section 7, the six economics studies cited above are reviewed and compared in terms of their key resource, reservoir and plant performance, and cost assumptions. Based on these comparisons, the report estimates parameters for three composite cases. Important parameters include: (1) resource quality-average geothermal gradient (C/km) and well depth, (2) reservoir performance-effective productivity, flow impedance, and lifetime (thermal drawdown rate), (3) cost components-drilling, reservoir formation, and power plant costs and (4) economic factors-discount and interest rates, taxes, etc. In Section 8, composite case conditions were used to reassess economic projections for HDR-produced electricity. In Section 9, a generalized economic model for HDR-produced electricity is presented to show the effects of resource grade, reservoir performance parameters, and other important factors on projected costs. A sensitivity and uncertainty analysis using this model is given in Section 10. Section 11 treats a modification of the economic model for predicting costs for direct, non-electric applications. HDR economic projections for the U.S. are broken down by region in Section 12. In Section 13, the report provides recommendations for continued research and development to reduce technical and economic uncertainties relevant to the commercialization of HDR. [DJE-2005

Tester, Jefferson W.; Herzog, Howard J.

1990-07-01T23:59:59.000Z

223

The Monitoring and Evaluation of Geothermal Systems.  

E-Print Network (OSTI)

??With the heightened importance of green engineering in todays society, harnessing the Earths internal energy has become ever more important. Specifically, the use of geothermal (more)

Maynard, Whitney E.

2010-01-01T23:59:59.000Z

224

Podhale (South Poland) geothermal district heating system  

Science Journals Connector (OSTI)

The search for geothermal resources in the Podhale Region began in the late 1980s. The Banska IG-1 well, drilled in 1981, served as the starting point for an expansion of those research activities. A geothermal pilot plant was put into operation in 1993. During that same year the company Geotermia Podhalanska (GP) was founded and the pilot project, including the first distribution network for 20 customers, was constructed. After the initial phase of project implementation from 1993 to 1995, during which a pilot plant was constructed and put into operation for demonstration purposes by the Polish Academy for Sciences using the first geothermal doublet (a production well in Banska Nizna and a reinjection well in Bialy Dunajec), and connection of 200 households through a small district heating network, the World Bank got involved in the geothermal district heating project. Since then, significant progress has been made, increasing the overall heat capacity and geothermal output as well as the service area to the City of Zakopane, approx. 14 km from the production wells. In November 2001 the first geothermal heat was delivered to customers in Zakopane.

Piotr Dlugosz

2003-01-01T23:59:59.000Z

225

Geothermal heating system for the Children's Museum of Utah  

SciTech Connect

The results of a study to determine the engineering and economic feasibility of using the Wasatch Hot Spring resource for space heating of the Children's Library building are presented. The Wasatch Hot Spring with a reported flow of about 63 gpm (240 l/min) at an average temperature of 104/sup 0/F is not capable of furnishing the needed heat for the Children's Museum building. The underground paths along which the thermal waters flow to their outlets at the Warm Springs Fault are not presently known. It is possible if the thermal water ascends from the deep layers of the earth along the Warm Springs Fault that increased geothermal flow at a higher temperature can be produced by drilling into the fault. Assuming that sufficient geothermal fluid quantity is produced by drilling in the area, an analysis is made of a geothermal heating system for the building based on different fluid temperatures. It is assumed that the present and planned heating systems be left intact with the gas fired boilers taking over during cold periods when the geothermal system fails to provide sufficient heat. Economic analysis shows that the geothermal system is very attractive, even for the lowest geothermal fluid temperature considered (110/sup 0/F).

Karlsson, T.

1984-07-01T23:59:59.000Z

226

FRACTURE STIMULATION IN ENHANCED GEOTHERMAL  

E-Print Network (OSTI)

FRACTURE STIMULATION IN ENHANCED GEOTHERMAL SYSTEMS A REPORT SUBMITTED TO THE DEPARTMENT OF ENERGY of stimulation is induced shear on preexisting fractures, which increases their transmissibility by orders of magnitude. The processes that create fractured rock are discussed from the perspective of geology and rock

Stanford University

227

High-Temperature-High-Volume Lifting For Enhanced Geothermal Systems  

Open Energy Info (EERE)

Temperature-High-Volume Lifting For Enhanced Geothermal Systems Temperature-High-Volume Lifting For Enhanced Geothermal Systems Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title High-Temperature-High-Volume Lifting For Enhanced Geothermal Systems Project Type / Topic 1 Recovery Act: Enhanced Geothermal Systems Component Research and Development/Analysis Project Type / Topic 2 High-Temperature-High-Volume Lifting Project Description The proposed scope of work is divided into three Phases. Overall system requirements will be established in Phase 1, along with an evaluation of existing lifting system capability, identification of technology limitations, and a conceptual design of an overall lifting system. In developing the system components in Phase 2, component-level tests will be conducted using GE facilities. Areas of development will include high-temperature drive system materials, journal and thrust bearings, and corrosion and erosion-resistant lifting pump components. Finally, in Phase 3, the overall lab-scale lifting system will be demonstrated in a flow loop that will be constructed at GE Global Research.

228

Technology Development and Field Trials of EGS Drilling Systems  

Energy.gov (U.S. Department of Energy (DOE))

Project objective: Development of drilling systems based upon rock penetration technologies not commonly employed in the geothermal industry.

229

PROCEEDINGS, Thirty-Sixth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, January 31 -February 2, 2011  

E-Print Network (OSTI)

from low permeability and/or porosity geothermal resources. Existing geochemical reactive transport reservoir characterization and present example analyses of the pore systems of representative rocks fromPROCEEDINGS, Thirty-Sixth Workshop on Geothermal Reservoir Engineering Stanford University

Stanford University

230

Chemical stimulation techniques for geothermal wells: experiments on the three-well EGS system at Soultz-sous-Forts, France  

Science Journals Connector (OSTI)

Rock matrix stimulation is a method of enhancing well production or injection within a broad range of challenging environments, varying from naturally fractured limestones to sandstones with complex mineralogy. A common and often successful stimulation option, matrix acidizing, utilizes acids that react and remove mineral phases restricting fluid flow. Reviewed is the technology of chemical treatments available for oil, gas and geothermal wells and the key elements and results of the chemical reservoir stimulation program at the Soultz-sous-Forts, France, Enhanced Geothermal System Project.

Sandrine Portier; Franois-David Vuataz; Patrick Nami; Bernard Sanjuan; Andr Grard

2009-01-01T23:59:59.000Z

231

Geothermal br Resource br Area Geothermal br Resource br Area Geothermal  

Open Energy Info (EERE)

Tectonic br Setting Host br Rock br Age Host br Rock br Lithology Tectonic br Setting Host br Rock br Age Host br Rock br Lithology Mean br Capacity Mean br Reservoir br Temp Amedee Geothermal Area Amedee Geothermal Area Walker Lane Transition Zone Geothermal Region Extensional Tectonics Mesozoic granite granodiorite MW K Beowawe Hot Springs Geothermal Area Beowawe Hot Springs Geothermal Area Central Nevada Seismic Zone Geothermal Region Extensional Tectonics MW K Blue Mountain Geothermal Area Blue Mountain Geothermal Area Northwest Basin and Range Geothermal Region Extensional Tectonics triassic metasedimentary MW K Brady Hot Springs Geothermal Area Brady Hot Springs Geothermal Area Northwest Basin and Range Geothermal Region Extensional Tectonics MW Coso Geothermal Area Coso Geothermal Area Walker Lane Transition Zone

232

Geothermal: Sponsored by OSTI -- Final Report: Geothermal Dual...  

Office of Scientific and Technical Information (OSTI)

Report: Geothermal Dual Acoustic Tool for Measurement of Rock Stress Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On HomeBasic Search...

233

Geothermal Technologies | Open Energy Information  

Open Energy Info (EERE)

Print PDF Print PDF Geothermal Technologies Geothermal energy can be utilized for electricity or heating in more than one way. Regardless of the energy conversion, geothermal energy requires heat(in the form of rock), water, and flow; and every resources will have different values for each. Some resources have very high temperature rock with high porosity (allowing for flow) but little to know water (see Enhanced Geothermal Systems (EGS). Some resources have plenty of water, great flow, but the temperatures are not very high which are commonly used for direct use. Any combination of those 3 things can be found in nature, and for that reason there are different classifications of geothermal energy. It is possible for a resource to be technically capable of both electricity production and heating purposes, but the basic classifications

234

Property:Geothermal/Partner6Website | Open Energy Information  

Open Energy Info (EERE)

Partner6Website Partner6Website Jump to: navigation, search Property Name Geothermal/Partner6Website Property Type URL Description Partner 6 Website (URL) Pages using the property "Geothermal/Partner6Website" Showing 4 pages using this property. C Complete Fiber/Copper Cable Solution for Long-Term Temperature and Pressure Measurement in Supercritical Reservoirs and EGS Wells Geothermal Project + http://www.sensortran.com/ + I Innovative Exploration Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Geothermal Project + http://www.pitt.edu/ + S Seismic Technology Adapted to Analyzing and Developing Geothermal Systems Below Surface-Exposed High-Velocity Rocks Geothermal Project + http://www.sercel.com/ + T The Snake River Geothermal Drilling Project - Innovative Approaches to Geothermal Exploration Geothermal Project + http://www.icdp-online.org/contenido/icdp/front_content.php +

235

Stable-Isotope Studies Of Rocks And Secondary Minerals In A Vapor...  

Open Energy Info (EERE)

Stable-Isotope Studies Of Rocks And Secondary Minerals In A Vapor-Dominated Hydrothermal System At The Geysers, Sonoma County, California Jump to: navigation, search GEOTHERMAL...

236

Chapter 12 - Geothermal Energy  

Science Journals Connector (OSTI)

Publisher Summary This chapter discusses where the earth's thermal energy is sufficiently concentrated for economic use, the various types of geothermal systems, the production and utilization of the resource, and the environmental benefits and costs of geothermal production. Earth scientists quantify the energy and temperature in the earth in terms of heat flow and temperature gradient. The heat of the earth is derived from two components: the heat generated by the formation of the earth, and heat generated by radioactive decay of elements in the upper parts of the earth. The word geothermal comes from the combination of the Greek words go, meaning earth, and thrm, meaning heat. Geothermal resources are concentrations of the earth's heat, or geothermal energy, that can be extracted and used economically now or in the reasonable future. The earth contains an immense amount of heat but the heat generally is too diffuse or deep for economic use. Hence, the search for geothermal resources focuses on those areas of the earth's crust where geological processes have raised temperatures near enough to the surface that the heat contained can be utilized. Currently, only concentrations of heat associated with water in permeable rocks can be exploited economically. These systems are known as hydrothermal geothermal systems. All commercial geothermal production is currently restricted to geothermal systems that are sufficiently hot for the use and that contain a reservoir with sufficient available water and productivity for economic development. Geothermal energy is one of the cleaner forms of energy now available in commercial quantities. Use of geothermal energy avoids the problems of acid rain and greatly reduces greenhouse gas emissions and other forms of air pollution.

Joel L. Renner

2008-01-01T23:59:59.000Z

237

Microhole arrays for improved heat mining from enhanced geothermal systems  

E-Print Network (OSTI)

Plant for Exploiting Geothermal Energy, US Patent Morris,2006. The Future of Geothermal Energy Impact of Enhanceda c t Keywords: Geothermal energy Heat extraction Microholes

Finsterle, S.

2014-01-01T23:59:59.000Z

238

National Geothermal Data System Demo 01-28-14 | Department of...  

Energy Savers (EERE)

National Geothermal Data System Demo 01-28-14 National Geothermal Data System Demo 01-28-14 ngds-webinar-azgs.pdf More Documents & Publications How to Utilize the National...

239

Geology and alteration of the Raft River geothermal system, Idaho | Open  

Open Energy Info (EERE)

alteration of the Raft River geothermal system, Idaho alteration of the Raft River geothermal system, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Geology and alteration of the Raft River geothermal system, Idaho Details Activities (1) Areas (1) Regions (0) Abstract: analcime; Cassia County Idaho; Cenozoic; chlorite; chlorite group; clay minerals; economic geology; exploration; framework silicates; geothermal energy; Idaho; illite; kaolinite; laumontite; montmorillonite; Neogene; Precambrian; Raft Formation; Raft River KGRA; Salt Lake Formation; sheet silicates; silicates; Tertiary; United States; wairakite; wells; zeolite group Author(s): Blackett, R.E.; Kolesar, P.T. Published: Geothermal Resource Council Transactions 1983, 1/1/1983 Document Number: Unavailable DOI: Unavailable

240

Standard Guide for Specifying Thermal Performance of Geothermal Power Systems  

E-Print Network (OSTI)

1.1 This guide covers power plant performance terms and criteria for use in evaluation and comparison of geothermal energy conversion and power generation systems. The special nature of these geothermal systems makes performance criteria commonly used to evaluate conventional fossil fuel-fired systems of limited value. This guide identifies the limitations of the less useful criteria and defines an equitable basis for measuring the quality of differing thermal cycles and plant equipment for geothermal resources. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

American Society for Testing and Materials. Philadelphia

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Exergoeconomic evaluation on the optimum heating circuit system of Simav geothermal district heating system  

Science Journals Connector (OSTI)

Simav is one of the most important 15 geothermal areas in Turkey. It has several geothermal resources with the mass flow rate ranging from 35 to 72kg/s and temperature from 88 to 148C. Hence, these geothermal resources are available to use for several purposes, such as electricity generation, district heating, greenhouse heating, and balneological purposes. In Simav, the 5000 residences are heated by a district heating system in which these geothermal resources are used. Beside this, a greenhouse area of 225,000m2 is also heated by geothermal. In this study, the working conditions of the Simav geothermal district heating system have been optimized. In this paper, the main characteristics of the system have been presented and the impact of the parameters of heating circuit on the system are investigated by the means of energy, exergy, and life cycle cost (LCC) concepts. As a result, the optimum heating circuit has been determined as 60/49C.

Oguz Arslan; M.Arif Ozgur; Ramazan Kose; Abtullah Tugcu

2009-01-01T23:59:59.000Z

242

New energy and exergy parameters for geothermal district heating systems  

Science Journals Connector (OSTI)

This paper introduces four new parameters, namely energetic renewability ratio, exergetic renewability ratio, energetic reinjection ratio, and exergetic reinjection ratio for geothermal district energy systems. These parameters are applied to Edremit Geothermal District Heating System (GDHS) in Balikesir, Turkey for daily, monthly and yearly assessments and their variations are studied. In addition, the actual data are regressed to obtain some applied correlations for practical use. Some results follow: (i) Both energetic and exergetic renewability ratios decrease with decreasing temperature in heating season and increasing temperature in the summer. (ii) Both energetic and exergetic reinjection ratios increase with decreasing temperature for heating season and increase with increasing temperature for summer season.

C. Coskun; Zuhal Oktay; I. Dincer

2009-01-01T23:59:59.000Z

243

Geothermal System Saves Dollars, Makes Sense for Maryland Family |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

System Saves Dollars, Makes Sense for Maryland Family System Saves Dollars, Makes Sense for Maryland Family Geothermal System Saves Dollars, Makes Sense for Maryland Family April 16, 2010 - 5:15pm Addthis A 36-foot-tall drill was needed to install the geothermal system at the Gearon’s house in Derwood, MD. | Photo courtesy of Chris Gearon | A 36-foot-tall drill was needed to install the geothermal system at the Gearon's house in Derwood, MD. | Photo courtesy of Chris Gearon | Lindsay Gsell "At the end of the day, it cost us about the same as if we just replaced our furnace and AC with another furnace and AC, but the big difference is that we're not spending $3,000 on oil bills anymore." Chris Gearon, Derwood, MD resident who recently installed a geothermal system to heal and cool his home Chris Gearon's 24-year old oil furnace was tired. What happened if the

244

Insights From Laboratory Experiments On Simulated Faults With Application To Fracture Evolution In Geothermal Systems  

SciTech Connect

Laboratory experiments provide a wealth of information related to mechanics of fracture initiation, fracture propagation processes, factors influencing fault strength, and spatio-temporal evolution of fracture properties. Much of the existing literature reports on laboratory studies involving a coupling of thermal, hydraulic, mechanical, and/or chemical processes. As these processes operate within subsurface environments exploited for their energy resource, laboratory results provide insights into factors influencing the mechanical and hydraulic properties of geothermal systems. I report on laboratory observations of strength and fluid transport properties during deformation of simulated faults. The results show systematic trends that vary with stress state, deformation rate, thermal conditions, fluid content, and rock composition. When related to geophysical and geologic measurements obtained from engineered geothermal systems (e.g. microseismicity, wellbore studies, tracer analysis), laboratory results provide a means by which the evolving thermal reservoir can be interpreted in terms of physico-chemical processes. For example, estimates of energy release and microearthquake locations from seismic moment tensor analysis can be related to strength variations observed from friction experiments. Such correlations between laboratory and field data allow for better interpretations about the evolving mechanical and fluid transport properties in the geothermal reservoir ultimately leading to improvements in managing the resource.

Stephen L. Karner, Ph.D

2006-06-01T23:59:59.000Z

245

GTP Adds Meeting on the National Geothermal Data System Project to Peer Review  

Energy.gov (U.S. Department of Energy (DOE))

The design of the National Geothermal Data System (NGDS) was initiated in early fiscal year 2010 to address capturing and providing geothermal data to users -- researchers, industry, state and federal agencies, and the public.

246

Development of Advanced Thermal-Hydrological-Mechanical-Chemical (THMC) Modeling Capabilities for Enhanced Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

Project objectives: Develop a general framework for effective flow of water, steam and heat in in porous and fractured geothermal formations. Develop a computational module for handling coupled effects of pressure, temperature, and induced rock deformations. Develop a reliable model of heat transfer and fluid flow in fractured rocks.

247

Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report  

SciTech Connect

The Engineered Geothermal System (EGS) Exploration Methodology Project is developing an exploration approach for EGS through the integration of geoscientific data. The Project chose the Dixie Valley Geothermal System in Nevada as a field laboratory site for methodology calibration purposes because, in the public domain, it is a highly characterized geothermal system in the Basin and Range with a considerable amount of geoscience and most importantly, well data. The overall project area is 2500km2 with the Calibration Area (Dixie Valley Geothermal Wellfield) being about 170km2. The project was subdivided into five tasks (1) collect and assess the existing public domain geoscience data; (2) design and populate a GIS database; (3) develop a baseline (existing data) geothermal conceptual model, evaluate geostatistical relationships, and generate baseline, coupled EGS favorability/trust maps from +1km above sea level (asl) to -4km asl for the Calibration Area at 0.5km intervals to identify EGS drilling targets at a scale of 5km x 5km; (4) collect new geophysical and geochemical data, and (5) repeat Task 3 for the enhanced (baseline + new ) data. Favorability maps were based on the integrated assessment of the three critical EGS exploration parameters of interest: rock type, temperature and stress. A complimentary trust map was generated to compliment the favorability maps to graphically illustrate the cumulative confidence in the data used in the favorability mapping. The Final Scientific Report (FSR) is submitted in two parts with Part I describing the results of project Tasks 1 through 3 and Part II covering the results of project Tasks 4 through 5 plus answering nine questions posed in the proposal for the overall project. FSR Part I presents (1) an assessment of the readily available public domain data and some proprietary data provided by Terra-Gen Power, LLC, (2) a re-interpretation of these data as required, (3) an exploratory geostatistical data analysis, (4) the baseline geothermal conceptual model, and (5) the EGS favorability/trust mapping. The conceptual model presented applies to both the hydrothermal system and EGS in the Dixie Valley region. FSR Part II presents (1) 278 new gravity stations; (2) enhanced gravity-magnetic modeling; (3) 42 new ambient seismic noise survey stations; (4) an integration of the new seismic noise data with a regional seismic network; (5) a new methodology and approach to interpret this data; (5) a novel method to predict rock type and temperature based on the newly interpreted data; (6) 70 new magnetotelluric (MT) stations; (7) an integrated interpretation of the enhanced MT data set; (8) the results of a 308 station soil CO2 gas survey; (9) new conductive thermal modeling in the project area; (10) new convective modeling in the Calibration Area; (11) pseudo-convective modeling in the Calibration Area; (12) enhanced data implications and qualitative geoscience correlations at three scales (a) Regional, (b) Project, and (c) Calibration Area; (13) quantitative geostatistical exploratory data analysis; and (14) responses to nine questions posed in the proposal for this investigation. Enhanced favorability/trust maps were not generated because there was not a sufficient amount of new, fully-vetted (see below) rock type, temperature, and stress data. The enhanced seismic data did generate a new method to infer rock type and temperature. However, in the opinion of the Principal Investigator for this project, this new methodology needs to be tested and evaluated at other sites in the Basin and Range before it is used to generate the referenced maps. As in the baseline conceptual model, the enhanced findings can be applied to both the hydrothermal system and EGS in the Dixie Valley region.

Iovenitti, Joe

2014-01-02T23:59:59.000Z

248

Final Report: Geothermal Dual Acoustic Tool for Measurement of Rock Stress  

SciTech Connect

This paper outlines the technology need for a rock formation stress measurement in future EGS wells. This paper reports on the results of work undertaken under a Phase I, DOE/SBIR on the feasibility to build an acoustic well logging tool for measuring rock formation stress.

Normann, Randy A.

2014-12-01T23:59:59.000Z

249

Enhanced Geothermal Systems (EGS) with CO2 as Heat Transmission Fluid  

Open Energy Info (EERE)

with CO2 as Heat Transmission Fluid with CO2 as Heat Transmission Fluid Geothermal Lab Call Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Enhanced Geothermal Systems (EGS) with CO2 as Heat Transmission Fluid Project Type / Topic 1 Laboratory Call for Submission of Applications for Research, Development and Analysis of Geothermal Technologies Project Type / Topic 2 Supercritical Carbon Dioxide / Reservoir Rock Chemical Interactions Project Description Previous and current attempts to develop EGS in the U.S., Japan, Europe and Australia have all employed water as a heat transmission fluid. Water has many properties that make it a favorable medium for heat extraction, but it also has serious drawbacks. The use of supercritical CO2 (scCO2) instead of water as heat extraction fluid was suggested by Donald Brown of Los Alamos National Laboratory as a "game changing" alternative that can avoid the problems of aqueous fluids, make heretofore inaccessible energy resources available for human use, and provide ancillary benefits by using and storing CO2.

250

Isotopic Analysis Fluid At Coso Geothermal Area (1997) | Open Energy  

Open Energy Info (EERE)

Fluid At Coso Geothermal Area (1997) Fluid At Coso Geothermal Area (1997) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis- Fluid At Coso Geothermal Area (1997) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Isotopic Analysis- Fluid Activity Date 1997 Usefulness not indicated DOE-funding Unknown Exploration Basis Identify the source of chlorine Notes The 36Cl/Cl values for several geothermal water samples and reservoir host rock samples have been measured. The results suggest that the thermal waters could be connate waters derived from sedimentary formations, presumably underlying and adjacent top the granitic rocks, which have recently migrated into the host rocks. Alternatively, most of the chlorine but not the water, may have recently input into the system from magmatic

251

Strategies For Detecting Hidden Geothermal Systems By Near-Surface Gas  

Open Energy Info (EERE)

Strategies For Detecting Hidden Geothermal Systems By Near-Surface Gas Strategies For Detecting Hidden Geothermal Systems By Near-Surface Gas Monitoring Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Strategies For Detecting Hidden Geothermal Systems By Near-Surface Gas Monitoring Details Activities (6) Areas (1) Regions (0) Abstract: Hidden geothermal systems are those systems above which hydrothermal surface features (e.g., hot springs, fumaroles, elevated ground temperatures, hydrothermal alteration) are lacking. Emissions of moderate to low solubility gases (e.g., CO2, CH4, He) may be one of the primary near-surface signals from these systems. Detection of anomalous gas emissions related to hidden geothermal systems may therefore be an important tool to discover new geothermal resources. This study investigates the potential for CO2 detection and monitoring in the

252

Geothermal Data via the Virginia Tech and DMME Portal to the National Geothermal Data System for the Eastern and Southeastern United States from the Regional Geophysics Laboratory of Virginia Polytechnic Institute and State University  

DOE Data Explorer (OSTI)

The former title for this record was "Geothermal Data for the Eastern and Southeastern U.S. from the Regional Geophysics Laboratory of Virginia Tech." The content originally referenced is still available. It includes geothermal maps of seven southeastern states with accompanying data tables. The seven states are: New Jersey, Maryland, Delaware, Virginia, North Carolina, South Caroline, and Georgia. Data types include geothermal data, seismic data, and magnetic and gravity data. Typical geothermal data may include tables of temperature versus depth data, plots of temperature/gradient versus depth, tables of thermal conductivity data, and tables of gamma log data. Other resources available from the RGL provide information about hot springs in the southeastern U.S., temperatures for Atlantic Coastal Plain sediments, and deep fracture permeability in crystalline rocks in the eastern and southeastern U.S. Recently, this website and its collection of geothermal data has been renamed and reorganized as a portal into the National Geothermal Data System, a move that makes far more data both available and integrated.

253

Experiment-Based Model for the Chemical Interactions between Geothermal  

Open Energy Info (EERE)

Experiment-Based Model for the Chemical Interactions between Geothermal Experiment-Based Model for the Chemical Interactions between Geothermal Rocks, Supercritical Carbon Dioxide and Water Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Experiment-Based Model for the Chemical Interactions between Geothermal Rocks, Supercritical Carbon Dioxide and Water Project Type / Topic 1 Recovery Act: Enhanced Geothermal Systems Component Research and Development/Analysis Project Type / Topic 2 Supercritical Carbon Dioxide / Reservoir Rock Chemical Interactions Project Description The geochemical model will be developed on a foundation of both theory and measurements of chemical and physical interactions between minerals, rocks, scCO2 and water. An experimentally validated reservoir modeling capability is critically important for the evaluation of the scCO2-EGS concept, the adoption of which could significantly enhance energy production in the USA.

254

Energy Return On Investment of Engineered Geothermal Systems Data  

SciTech Connect

The project provides an updated Energy Return on Investment (EROI) for Enhanced Geothermal Systems (EGS). Results incorporate Argonne National Laboratory's Life Cycle Assessment and base case assumptions consistent with other projects in the Analysis subprogram. EROI is a ratio of the energy delivered to the consumer to the energy consumed to build, operate, and decommission the facility. EROI is important in assessing the viability of energy alternatives. Currently EROI analyses of geothermal energy are either out-of-date, of uncertain methodology, or presented online with little supporting documentation. This data set is a collection of files documenting data used to calculate the Energy Return On Investment (EROI) of Engineered Geothermal Systems (EGS) and erratum to publications prior to the final report. Final report is available from the OSTI web site (http://www.osti.gov/geothermal/). Data in this collections includes the well designs used, input parameters for GETEM, a discussion of the energy needed to haul materials to the drill site, the baseline mud program, and a summary of the energy needed to drill each of the well designs. EROI is the ratio of the energy delivered to the customer to the energy consumed to construct, operate, and decommission the facility. Whereas efficiency is the ratio of the energy delivered to the customer to the energy extracted from the reservoir.

Chip Mansure

2012-01-01T23:59:59.000Z

255

New Geothermal Data System Could Open Up Clean-Energy Reserves  

Energy.gov (U.S. Department of Energy (DOE))

New geothermal data could open up clean energy reserves nationwide. Scientific American reported that the National Geothermal Data System is helping to isolate geothermal prospects, with the goal of fully profiling geologic and geophysical aspects of these deep energy reserves, which will reduce costly investment by better targeting wells.

256

Geothermal/Exploration | Open Energy Information  

Open Energy Info (EERE)

Geothermal/Exploration Geothermal/Exploration < Geothermal(Redirected from Exploration) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Land Use Leasing Exploration Well Field Power Plant Transmission Environment Water Use Print PDF Geothermal Exploration General Techniques Tree Techniques Table Regulatory Roadmap NEPA (120) Geothermal springs along Yellowstone National Park's Firehole River in the cool air of autumn. The world's most environmentally sensitive geothermal features are protected by law. Geothermal Exploration searches the earth's subsurface for geothermal resources that can be extracted for the purpose of electricity generation. A geothermal resource is as commonly a volume of hot rock and water, but in the case of EGS, is simply hot rock. Geothermal exploration programs

257

MATHEMATICAL MODELING OF THE BEHAVIOR OF GEOTHERMAL SYSTEMS UNDER EXPLOITATION  

E-Print Network (OSTI)

U. S. Department of Energy, Geothermal direct h e a t a p pU S Department of Energy, Geothermal Energy Division, 87,homes are heated by geothermal energy, and there are plans t

Bodvarsson, G.S.

2010-01-01T23:59:59.000Z

258

MATHEMATICAL MODELING OF THE BEHAVIOR OF GEOTHERMAL SYSTEMS UNDER EXPLOITATION  

E-Print Network (OSTI)

h e Nordic Symposium on Geothermal Energy, (May 29-31) 1978.P. , and C. O t t e , Geothermal energy, Stanford Universityresources, i n Geothermal Energy, P. Kruger and C. O t t e (

Bodvarsson, G.S.

2010-01-01T23:59:59.000Z

259

Isotopic Analysis- Rock | Open Energy Information  

Open Energy Info (EERE)

Isotopic Analysis- Rock Isotopic Analysis- Rock Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Isotopic Analysis- Rock Details Activities (13) Areas (11) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Lab Analysis Techniques Exploration Sub Group: Rock Lab Analysis Parent Exploration Technique: Rock Lab Analysis Information Provided by Technique Lithology: Water rock interaction Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Isotopic Analysis- Rock: Isotopes are atoms of the same element that have different numbers of neutrons. An isotopic analysis looks at a particular isotopic element(s) in a given system, while the conditions which increase/decrease the number of neutrons are well understood and measurable.

260

Baseline System Costs for 50.0 MW Enhanced Geothermal System -- A Function  

Open Energy Info (EERE)

Baseline System Costs for 50.0 MW Enhanced Geothermal System -- A Function Baseline System Costs for 50.0 MW Enhanced Geothermal System -- A Function of: Working Fluid, Technology, and Location Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Baseline System Costs for 50.0 MW Enhanced Geothermal System -- A Function of: Working Fluid, Technology, and Location Project Type / Topic 1 Recovery Act: Enhanced Geothermal Systems Component Research and Development/Analysis Project Type / Topic 2 Geothermal Analysis Project Description This effort will support the expansion of Enhanced Geothermal Systems (EGS), supporting DOE Strategic Themes of "energy security" and sub goal of "energy diversity"; reducing the Nation's dependence on foreign oil while improving our environment. A 50 MW has been chosen as a design point, so that the project may also assess how different machinery approaches will change the costing - it is a mid point in size where multiple solutions exist that will allow the team to effectively explore the options in the design space and understand the cost.

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Engineered Geothermal Systems Energy Return On Energy Investment  

SciTech Connect

Energy Return On Investment (EROI) is an important figure of merit for assessing the viability of energy alternatives. Too often comparisons of energy systems use ??efficiency? when EROI would be more appropriate. For geothermal electric power generation, EROI is determined by the electricity delivered to the consumer compared to the energy consumed to construct, operate, and decommission the facility. Critical factors in determining the EROI of Engineered Geothermal Systems (EGS) are examined in this work. These include the input energy embodied into the system. Embodied energy includes the energy contained in the materials, as well as, that consumed in each stage of manufacturing from mining the raw materials to assembling the finished system. Also critical are the system boundaries and value of the energy ?? heat is not as valuable as electrical energy. The EROI of an EGS depends upon a number of factors that are currently unknown, for example what will be typical EGS well productivity, as well as, reservoir depth, temperature, and temperature decline rate. Thus the approach developed is to consider these factors as parameters determining EROI as a function of number of wells needed. Since the energy needed to construct a geothermal well is a function of depth, results are provided as a function of well depth. Parametric determination of EGS EROI is calculated using existing information on EGS and US Department of Energy (DOE) targets and is compared to the ??minimum? EROI an energy production system should have to be an asset rather than a liability.

Mansure, A J

2012-12-10T23:59:59.000Z

262

Pairing Integrated Gasification and Enhanced Geothermal Systems (EGS) in Semiarid Environments  

Science Journals Connector (OSTI)

The New Mexico Rio Grande Rift Basin has been the subject of much geothermal exploration with the data organized into many different formats(7-10)with many other reports on spring temperatures, spring chemistry, geothermal municipal wells, and geothermal oil and gas wells. ... The site selected for this project is near Transocean Isleta-1 well and is selected due to satisfactory depth to Precambrian basement rocks (?3.2 km), a high geothermal gradient (39 C/km) and resulting high bottom-hole temperature (131 C), and large thickness of the Precambrian basement rock that could be penetrated to create a reservoir (?1.8 km). ... Where fracture spacing is large the parallel fracture model (PFM) provides better estimates of thermal output and of thermal drawdown although the boundary of the reservoir is assumed thermally isolated and no supplemental heat supply is possible. ...

Divya Chandra; Caleb Conrad; Derek Hall; Nicholas Montebello; Andrew Weiner; Sarma Pisupati; Uday Turaga; Ghazal Izadi; Arun Ram Mohan; Derek Elsworth

2012-10-29T23:59:59.000Z

263

Demonstration of an Enhanced Geothermal System at the Northwest...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Bradys Hot Springs, Nevada Detecting Fractures Using Technology at High Temperatures and Depths - Geothermal Ultrasonic Fracture Imager (GUFI); 2010 Geothermal Technology Program...

264

Enhanced Geothermal System (EGS) Fact Sheet | Department of Energy  

Energy Savers (EERE)

The Geysers Geothermal Power Plant in California Calpine Staff Run Tests at The Geysers Geothermal Power Plant in California The EGS fact sheet provides an overview of this...

265

Geothermal Literature Review At Fenton Hill Hdr Geothermal Area (Goff &  

Open Energy Info (EERE)

Goff & Goff & Decker, 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At Fenton Hill Hdr Geothermal Area (Goff & Decker, 1983) Exploration Activity Details Location Fenton Hill Hdr Geothermal Area Exploration Technique Geothermal Literature Review Activity Date Usefulness useful DOE-funding Unknown Notes Review and identification of 24 potential sites for EGS development across the U.S., as well as modeling of the representative geologic systems in which promising EGS sites occur. References Fraser Goff, Edward R. Decker (1983) Candidate Sites For Future Hot Dry Rock Development In The United States Retrieved from "http://en.openei.org/w/index.php?title=Geothermal_Literature_Review_At_Fenton_Hill_Hdr_Geothermal_Area_(Goff_%26_Decker,_1983)&oldid=511314"

266

A key review on performance improvement aspects of geothermal district heating systems and applications  

Science Journals Connector (OSTI)

This paper deals with a comprehensive analysis and discussion of geothermal district heating systems and applications. In this regard, case studies are presented to study the thermodynamic aspects in terms of energy and exergy and performance improvement opportunities of three geothermal district heating systems, namely (i) Balcova geothermal district heating system (BGDHS), (ii) Salihli geothermal district heating system (SGDHS), and (iii) Gonen geothermal district heating system (GGDHS) installed in Turkey. Energy and exergy modeling of geothermal district heating systems for system analysis and performance evaluation are given, while their performances are evaluated using energy and exergy analysis method. Energy and exergy specifications are presented in tables. In the analysis, the actual system operational data are utilized. In comparison of the local three district heating systems with each other, it is found that the SGDHS has highest energy efficiency, while the GGDHS has highest exergy efficiency.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer

2007-01-01T23:59:59.000Z

267

Conventional and advanced exergoeconomic analyses of geothermal district heating systems  

Science Journals Connector (OSTI)

Abstract The present study deals with analyzing, assessing and comparing conventional and advanced exergoeconomic analyses to identify the direction and potential for energy savings of a geothermal district heating system in future conditions/projections. As a real case study, the Afyon geothermal district heating system in Afyonkarahisar, Turkey, is considered while its actual operational thermal data on 8 February 2011 are utilized in the analysis, which is based on the specific exergy costing method. In this study for the first time, based on the concepts of avoidable/unavoidable and endogenous/exogenous parts, cost rates associated with both exergy destruction and capital investment of the geothermal district heating system are determined first, and the obtained results are then evaluated. The results indicate that the internal design changes play a more essential role in determining the cost of each component. The cost rate of unavoidable part within the components of the system is lower than that of the avoidable one. For the overall system, the value for the conventional exergoeconomic factor is determined to be 5.53% while that for the modified one is calculated to be 9.49%. As a result, the advanced exergoeconomic analysis makes more sense given the additional information in splitting process of the components.

Ali Keeba?; Arif Hepbasli

2014-01-01T23:59:59.000Z

268

Rock Sampling | Open Energy Information  

Open Energy Info (EERE)

Rock Sampling Rock Sampling Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Rock Sampling Details Activities (13) Areas (13) Regions (1) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: Field Sampling Parent Exploration Technique: Field Sampling Information Provided by Technique Lithology: Rock samples are used to define lithology. Field and lab analyses can be used to measure the chemical and isotopic constituents of rock samples. Stratigraphic/Structural: Provides information about the time and environment which formed a particular geologic unit. Microscopic rock textures can be used to estimate the history of stress and strain, and/or faulting. Hydrological: Isotope geochemistry can reveal fluid circulation of a geothermal system.

269

Thermally conductive cementitious grout for geothermal heat pump systems  

DOE Patents (OSTI)

A thermally conductive cement-sand grout for use with a geothermal heat pump system. The cement sand grout contains cement, silica sand, a superplasticizer, water and optionally bentonite. The present invention also includes a method of filling boreholes used for geothermal heat pump systems with the thermally conductive cement-sand grout. The cement-sand grout has improved thermal conductivity over neat cement and bentonite grouts, which allows shallower bore holes to be used to provide an equivalent heat transfer capacity. In addition, the cement-sand grouts of the present invention also provide improved bond strengths and decreased permeabilities. The cement-sand grouts can also contain blast furnace slag, fly ash, a thermoplastic air entraining agent, latex, a shrinkage reducing admixture, calcium oxide and combinations thereof.

Allan, Marita (Old Field, NY)

2001-01-01T23:59:59.000Z

270

Readily Available Data Help to Overcome Geothermal Deployment...  

Energy Savers (EERE)

Articles Energy Department Announces National Geothermal Data System to Accelerate Geothermal Energy Development The National Geothermal Data System deploys free,...

271

Experience with Small-scale Geothermal Energy Systems  

Science Journals Connector (OSTI)

ABSTRACT From an economic perspective, small-scale geothermal heating systems and ground water source heat pump schemes can be assessed using similar approaches. In particular, assessment shows that heat pump schemes can be economic in the U.K., especially for buildings with moderately high and continuous heating demand, with access to shallow, free-flowing ground water, in areas where prices for conventional fuels are high.

N.D. Mortimer

1984-01-01T23:59:59.000Z

272

Tap Geothermal Heat  

Science Journals Connector (OSTI)

Central to the proposal is the detonation of an underground thermonuclear device to create a large subterranean cavity of crushed rock in an area of geothermal activity. ...

1969-12-15T23:59:59.000Z

273

Geothermal district heating system feasibility analysis, Thermopolis, Wyoming  

SciTech Connect

The purpose of this study is to determine the technical and economic feasibility of constructing and operating a district heating system to serve the residential, commercial, and public sectors in Thermopolis. The project geothermal resource assessment, based on reviews of existing information and data, indicated that substantial hot water resources likely exist in the Rose Dome region 10 miles northeast of Thermopolis, and with quantities capable of supporting the proposed geothermal uses. Preliminary engineering designs were developed to serve the space heating and hot water heating demands for buildings in the Thermopolis-East Thermopolis town service area. The heating district design is based on indirect geothermal heat supply and includes production wells, transmission lines, heat exchanger units, and the closed loop distribution and collection system necessary to serve the individual customers. Three options are presented for disposal of the cooled waters-reinjection, river disposal, and agricultural reuse. The preliminary engineering effort indicates the proposed system is technically feasible. The design is sized to serve 1545 residences, 190 businesses, and 24 public buildings. The peak design meets a demand of 128.2 million Btu at production rates of 6400 gpm.

Goering, S.W.; Garing, K.L.; Coury, G.; Mickley, M.C.

1982-04-26T23:59:59.000Z

274

Thermochronometry At Coso Geothermal Area (2003) | Open Energy Information  

Open Energy Info (EERE)

Thermochronometry At Coso Geothermal Area (2003) Thermochronometry At Coso Geothermal Area (2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermochronometry At Coso Geothermal Area (2003) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Thermochronometry Activity Date 2003 Usefulness not indicated DOE-funding Unknown Exploration Basis Determine the age of the geothermal system and the granitic host rock using the 40Ar/39Ar thermal history Notes A downhole 40Ar/39Ar thermochronology study of granitic host-rock K-feldspar is presently being undertaken at the New Mexico Geochronology Research Laboratory. The technique couples the measurement of argon loss from K-feldspar and knowledge of the diffusion parameters of transport in K-feldspar to estimate the longevity of the system at present day

275

Mineralization associated with scale and altered rock and pipe fragments from the Berlin geothermal field, El Salvador;  

E-Print Network (OSTI)

control precipitation of gold and silver in geothermal wells can be used to model directly the formation

Long, Bernard

276

Geology of Injection Well 46A-19RD in the Coso Enhanced Geothermal Systems  

Open Energy Info (EERE)

of Injection Well 46A-19RD in the Coso Enhanced Geothermal Systems of Injection Well 46A-19RD in the Coso Enhanced Geothermal Systems Experiment Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Geology of Injection Well 46A-19RD in the Coso Enhanced Geothermal Systems Experiment Details Activities (1) Areas (1) Regions (0) Abstract: The Coso Geothermal Field is a large, high temperature system located in California on the western edge of the Basin and Range province. Well 46A-19RD, located in the southwestern portion of this field is currently the focus of a DOE-funded Enhanced Geothermal Systems (EGS) project. Petrologic and petrographic investigations of the well show that quartz diorite and granodiorite are dominant lithologies. Dikes of granophyre, containing phenocrysts of plagioclase, potassium feldspar, and

277

Geothermal Discovery Offers Hope for More Potential Across the Country  

Energy.gov (U.S. Department of Energy (DOE))

In summer 2012, a team of geoscientists from the Utah Geological Survey (UGS) in cooperation with the U.S. Geological Survey (USGS) drilled seven geothermal gradient holes in Utah's Black Rock Desert basin to test a new concept of high temperature geothermal resources in sedimentary basins. Seven drill holes were funded by the U.S. Department of Energy as part of a National Geothermal Data System project, managed by the Arizona Geological Survey.

278

300C Capable Electronics Platform and Temperature Sensor System For Enhanced Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

Project objectives: Enable geothermal wellbore monitoring through the development of SiC based electronics and ceramic packaging capable of sustained operation at temperatures up to 300?C and 10 km depth. Demonstrate the technology with a temperature sensor system.

279

E-Print Network 3.0 - active geothermal systems Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

February 1-3, 2010 Summary: of geothermal energy in Turkey has focused mainly on district heating. The first of these systems came on line... , solar, etc. Geological...

280

Systems for Electrical Power from Coproduced and Low Temperature Geothermal Resources  

Energy.gov (U.S. Department of Energy (DOE))

Presentation about Systems for Electrical Power from Coproduced and Low Temperature Geothermal Resources includes background, results and discussion, future plans and conclusion.

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

IEA-GIA ExCo- National Geothermal Data System and Online Tools  

Energy.gov (U.S. Department of Energy (DOE))

National Geothermal Data System presentation by Jay Nathwani at the September 30, 2011 IEA-GIA ExCo conference in London.

282

Intergrating Magnetotellurics, Soil Gas Geochemistry and Structural Analysis to Identify Hidden, High Enthalpy, Extensional Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

Intergrating Magnetotellurics, Soil Gas Geochemistry and Structural Analysis to Identify Hidden, High Enthalpy, Extensional Geothermal Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

283

Optimizing parameters for predicting the geochemical behavior and performance of discrete fracture networks in geothermal systems  

Energy.gov (U.S. Department of Energy (DOE))

Optimizing parameters for predicting the geochemical behavior and performance of discrete fracture networks in geothermal systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

284

Reservoir-Stimulation Optimization with Operational Monitoring for Creation of Enhanced Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

Reservoir-Stimulation Optimization with Operational Monitoring for Creation of Enhanced Geothermal Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

285

Development of Advanced Thermal-Hydrological-Mechanical-Chemical (THMC) Modeling Capabilities for Enhanced Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

Development of Advanced Thermal-Hydrological-Mechanical-Chemical (THMC) Modeling Capabilities for Enhanced Geothermal Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

286

Advanced Heat/Mass Exchanger Technology for Geothermal and solar Renewable Energy Systems  

Energy.gov (U.S. Department of Energy (DOE))

Advanced Heat/Mass Exchanger Technology for Geothermal and solar Renewable Energy Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

287

Enhanced Geothermal Systems (EGS) with CO2as Heat Transmission Fluid  

Energy.gov (U.S. Department of Energy (DOE))

The overall objective of the research is to explore the feasibility of operating enhanced geothermal systems (EGS) with CO2as heat transmission fluid.

288

DOE REAL-TIME SEISMIC MONITORING AT ENHANCED GEOTHERMAL SYSTEM SITES | Open  

Open Energy Info (EERE)

REAL-TIME SEISMIC MONITORING AT ENHANCED GEOTHERMAL SYSTEM SITES REAL-TIME SEISMIC MONITORING AT ENHANCED GEOTHERMAL SYSTEM SITES Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: DOE REAL-TIME SEISMIC MONITORING AT ENHANCED GEOTHERMAL SYSTEM SITES Details Activities (6) Areas (6) Regions (0) Abstract: Lawrence Berkeley National Laboratory (LBNL) at the direction of the United States Department of Energy (DOE) Geothermal Technologies EGS Program is installing, operating, and/or interfacing seismic arrays at multiple Enhanced Geothermal Systems (EGS) sites. The overall goal is to gather high resolution seismicity data before, during and after stimulation activities at the EGS projects. This will include both surface and borehole deployments (as necessary in available boreholes) to provide high quality

289

Active Geothermal Systems And Associated Gold Deposits In The Great Basin |  

Open Energy Info (EERE)

Geothermal Systems And Associated Gold Deposits In The Great Basin Geothermal Systems And Associated Gold Deposits In The Great Basin Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Active Geothermal Systems And Associated Gold Deposits In The Great Basin Details Activities (0) Areas (0) Regions (0) Abstract: In western North America, a number of geothermal systems derive their heat from magmas or cooling intrusions. The interior of the Great Basin however, is characterized by widespread amagmatic geothermal activity that owes its existence to high crustal heat flow and active extensional tectonics. Both the magmatically heated and extensional fluid types in the Great Basin have recently, or are currently, depositing gold. Quaternary to Pliocene-aged gold deposits with adjacent high-temperature (≤ 150°C)

290

A Geothermal District-Heating System and Alternative Energy Research Park  

Open Energy Info (EERE)

Geothermal District-Heating System and Alternative Energy Research Park Geothermal District-Heating System and Alternative Energy Research Park on the NM Tech Campus Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title A Geothermal District-Heating System and Alternative Energy Research Park on the NM Tech Campus Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Geothermal Energy Production from Low Temperature Resources, Coproduced Fluids from Oil and Gas Wells, and Geopressured Resources Project Type / Topic 3 Low Temperature Resources Project Description With prior support from the Department of Energy (GRED III Program), New Mexico Institute of Mining and Technology (NM Tech) has established that this resource likely has sufficient permeability (3000 Darcies) and temperatures (80-112 oC) to develop a campus-wide district heating system.

291

Energy Return On Investment of Engineered Geothermal Systems Data  

DOE Data Explorer (OSTI)

EROI is a ratio of the energy delivered to the consumer to the energy consumed to build, operate, and decommission the facility. EROI is important in assessing the viability of energy alternatives. Currently EROI analyses of geothermal energy are either out-of-date, of uncertain methodology, or presented online with little supporting documentation. This data set is a collection of files documenting data used to calculate the Energy Return On Investment (EROI) of Engineered Geothermal Systems (EGS) and erratum to publications prior to the final report. Final report is available from the OSTI web site (http://www.osti.gov/geothermal/). Data in this collections includes the well designs used, input parameters for GETEM, a discussion of the energy needed to haul materials to the drill site, the baseline mud program, and a summary of the energy needed to drill each of the well designs. EROI is the ratio of the energy delivered to the customer to the energy consumed to construct, operate, and decommission the facility. Whereas efficiency is the ratio of the energy delivered to the customer to the energy extracted from the reservoir.

Mansure, Chip

292

Geothermal Literature Review At Coso Geothermal Area (1987) | Open Energy  

Open Energy Info (EERE)

7) 7) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Geothermal Literature Review Activity Date 1987 Usefulness not indicated DOE-funding Unknown Exploration Basis Compare multiple theories of the structural control of the geothermal system Notes The geothermal system appears to be associated with at least one dominant north-south-trending feature which extends several miles through the east-central portion of the Coso volcanic field. The identified producing fractures occur in zones which range from 10 - 100s of feet in extent, separated by regions of essentially unfractured rock of similar composition. Wells in the Devil's Kitchen area have encountered fluids in excess of 4500F and flow rates of 1 million lb/hr at depths less than 4000

293

Audio-Magnetotellurics At Coso Geothermal Area (1977) | Open Energy  

Open Energy Info (EERE)

Coso Geothermal Area (1977) Coso Geothermal Area (1977) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Audio-Magnetotellurics Activity Date 1977 Usefulness not indicated DOE-funding Unknown Exploration Basis To investigate electrical properties of rocks associated with thermal phenomena of the Devil's Kitchen-Coso Hot Springs area Notes Audio-magnetotelluric geophysical surveys determined that the secondary low in the geothermal area, best defined by the 7.5-Hz AMT map and dc soundings, is caused by a shallow conductive zone (5--30 ohm m) interpreted to be hydrothermally altered Sierra Nevada basement rocks containing saline water of a hot water geothermal system. This zone of lowest apparent resistivities over the basement rocks lies within a closed contour of a

294

Pinpointing America's Geothermal Resources with Open Source Data  

Energy.gov (U.S. Department of Energy (DOE))

National Geothermal Data System addresses barriers to geothermal deployment by aggregating millions of geoscience datapoints and legacy geothermal research into a nationwide system that serves the geothermal community.

295

Enhanced Geothermal Systems | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

and performance Advanced drilling systems Well stimulation technologies Advanced fracture characterization technologies Induced seismic monitoring, prediction and mitigation...

296

Digital Mapping Of Structurally Controlled Geothermal Features With Gps  

Open Energy Info (EERE)

Digital Mapping Of Structurally Controlled Geothermal Features With Gps Digital Mapping Of Structurally Controlled Geothermal Features With Gps Units And Pocket Computers Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features With Gps Units And Pocket Computers Details Activities (1) Areas (1) Regions (0) Abstract: Hand-held global positioning system (GPS) units and pocket personal computers (PCs) were used to map surface geothermal features at the Bradys Hot Springs and Salt Wells geothermal systems, Churchill County, Nevada, in less time and with greater accuracy than would have been possible with conventional mapping methods. Geothermal features that were mapped include fumaroles, mud pots, warm ground, sinter, and a variety of silicified rocks. In both areas, the digital mapping was able to resolve

297

Geophysical logging case history of the Raft River geothermal system, Idaho  

Open Energy Info (EERE)

Geophysical logging case history of the Raft River geothermal system, Idaho Geophysical logging case history of the Raft River geothermal system, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Geophysical logging case history of the Raft River geothermal system, Idaho Details Activities (1) Areas (1) Regions (0) Abstract: Drilling to evaluate the geothermal resource in the Raft River Valley began in 1974 and resulted in the discovery of a geothermal reservoir at a depth of approximately 1523 m (500 ft). Several organizations and companies have been involved in the geophysical logging program. There is no comprehensive report on the geophysical logging, nor has there been a complete interpretation. The objectives of this study are to make an integrated interpretation of the available data and compile a case history. Emphasis has been on developing a simple interpretation

298

Category:Geothermal Technologies | Open Energy Information  

Open Energy Info (EERE)

Systems (EGS) G Geothermal Direct Use G cont. GeothermalExploration Ground Source Heat Pumps H Hydrothermal System S Sedimentary Geothermal Systems Retrieved from "http:...

299

Exergoeconomic analysis of geothermal district heating systems: A case study  

Science Journals Connector (OSTI)

An exergoeconomic study of geothermal district heating systems through mass, energy, exergy and cost accounting analyses is reported and a case study is presented for the Salihli geothermal district heating system (SGDHS) in Turkey to illustrate the present method. The relations between capital costs and thermodynamic losses for the system components are also investigated. Thermodynamic loss rate-to-capital cost ratios are used to show that, for the devices and the overall system, a systematic correlation appears to exist between capital cost and exergy loss (total or internal), but not between capital cost and energy loss or external exergy loss. Furthermore, a parametric study is conducted to determine how the ratio of thermodynamic loss rate to capital cost changes with reference temperature and to develop a correlation that can be used for practical analyses. The correlations may imply that devices in successful district heating systems such as the SGDHS are configured so as to achieve an overall optimal design, by appropriately balancing the thermodynamic (exergy-based) and economic (cost) characteristics of the overall systems and their devices.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer; Marc A. Rosen

2007-01-01T23:59:59.000Z

300

ANNOTATED RESEARCH BIBLIOGRAPHY FOR GEOTHERMAL RESERVOIR ENGINEERING  

E-Print Network (OSTI)

F i r s t Geopressured Geothermal Energy Conference. Austin,I 2nd Geopressured Geothermal Energy Conference. UniversityExperiment t o Extract Geothermal Energy From Hot Dry Rock."

Sudo!, G.A

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Pressure analysis of the hydromechanical fracture behaviour in stimulated tight sedimentary geothermal reservoirs  

E-Print Network (OSTI)

The future of Geothermal Energy. Massachusetts Institute ofthe exploitation of geothermal energy from such rocks. Wemethod to extract geothermal energy from tight sedimentary

Wessling, S.

2009-01-01T23:59:59.000Z

302

Monitoring and Modeling Fluid Flow in a Developing Enhanced Geothermal...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Seismicity; 2010 Geothermal Technology Program Peer Review Report Seismic Fracture Characterization Methods for Enhanced Geothermal Systems; 2010 Geothermal Technology...

303

Development of Exploration Methods for Engineered Geothermal System through Integrated Geoscience Interpretation  

Energy.gov (U.S. Department of Energy (DOE))

DOE Geothermal Peer Review 2010 - Presentation. This project will deploy, test and calibrate Non-invasive EGS Exploration Methodology integrating geoscience data to predict temperature and rock type at a scale of 5km x 5km at depths of 1-5km.

304

MATHEMATICAL MODELING OF THE BEHAVIOR OF GEOTHERMAL SYSTEMS UNDER EXPLOITATION  

E-Print Network (OSTI)

the East Mesa geothermal f i e l d i n the Imperial valley,geothermal r e s e r v o i r s (except those i n t h e Imperial Valley

Bodvarsson, G.S.

2010-01-01T23:59:59.000Z

305

Geothermal energy systems: research perspective for domestic energy provision  

Science Journals Connector (OSTI)

This article is focused on research demand for the environmental and economic sustainable utilization of geothermal reservoirs for base load supply of heat and electricity by Enhanced Geothermal Sy...

Ernst Huenges; Thomas Kohl; Olaf Kolditz; Judith Bremer

2013-12-01T23:59:59.000Z

306

Creation of an Engineered Geothermal System through Hydraulic...  

Office of Environmental Management (EM)

More Documents & Publications Microearthquake Technology for EGS Fracture Characterization Advanced 3D Geophysical Imaging Technologies for Geothermal Resource...

307

Geothermal pump down-hole energy regeneration system  

DOE Patents (OSTI)

Geothermal deep well energy extraction apparatus is provided of the general kind in which solute-bearing hot water is pumped to the earth's surface from a subterranean location by utilizing thermal energy extracted from the hot water for operating a turbine motor for driving an electrical power generator at the earth 3 s surface, the solute bearing water being returned into the earth by a reinjection well. Efficiency of operation of the total system is increased by an arrangement of coaxial conduits for greatly reducing the flow of heat from the rising brine into the rising exhaust of the down-well turbine motor.

Matthews, Hugh B. (Boylston, MA)

1982-01-01T23:59:59.000Z

308

Dynamics of hydrothermal seeps from the Salton Sea geothermal system (California, USA) constrained by temperature monitoring  

E-Print Network (OSTI)

Dynamics of hydrothermal seeps from the Salton Sea geothermal system (California, USA) constrained-, and petroleum-bearing seeps are part of the Salton Sea geothermal system (SSGS) in southern California. Carbon likely reflect a combination of hydrothermal flux variations from the SSGS and the local temporal changes

Svensen, Henrik

309

Ball State University Completes Nation's Largest Ground-Source Geothermal System with Support from Recovery Act  

Energy.gov (U.S. Department of Energy (DOE))

As part of the Obama Administration's all-of-the-above approach to American energy, the Energy Department today congratulated Ball State University for its campus-wide ground-source geothermal system, the nation's largest geothermal heating and cooling system.

310

Geothermal Resources and Technologies  

Energy.gov (U.S. Department of Energy (DOE))

This page provides a brief overview of geothermal energy resources and technologies supplemented by specific information to apply geothermal systems within the Federal sector.

311

Property:Geothermal/OtherPrincipalInvestigator | Open Energy Information  

Open Energy Info (EERE)

OtherPrincipalInvestigator OtherPrincipalInvestigator Jump to: navigation, search Property Name Geothermal/OtherPrincipalInvestigator Property Type String Description Other Principal Investigators Subproperties This property has the following 2 subproperties: A A Geothermal District-Heating System and Alternative Energy Research Park on the NM Tech Campus Geothermal Project D Development of Chemical Model to Predict the Interactions between Supercritical CO2 and Fluid, Rocks in EGS Reservoirs Geothermal Project Pages using the property "Geothermal/OtherPrincipalInvestigator" Showing 25 pages using this property. (previous 25) (next 25) A A 3D-3C Reflection Seismic Survey and Data Integration to Identify the Seismic Response of Fractures and Permeable Zones Over a Known Geothermal Resource at Soda Lake, Churchill Co., NV Geothermal Project + John Louie, University of Nevada and Lisa Shevenell, University of Nevada +

312

Structural interpretation of Coso Geothermal field, Inyo County, California  

Open Energy Info (EERE)

Coso Geothermal field, Inyo County, California Coso Geothermal field, Inyo County, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Structural interpretation of Coso Geothermal field, Inyo County, California Details Activities (2) Areas (1) Regions (0) Abstract: The Coso Geothermal field, located east of the Sierra Nevada at the northern edge of the high Mojave Desert in southern California, is an excellent example of a structurally controlled geothermal resource. The geothermal system appears to be associated with at least one dominant north-south-trending feature which extends several miles through the east-central portion of the Coso volcanic field. Wells drilled along this feature have encountered production from distinct fractures in crystalline basement rocks. The identified producing fractures occur in zones which

313

Geothermal News  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

news Office of Energy Efficiency & news Office of Energy Efficiency & Renewable Energy Forrestal Building 1000 Independence Avenue, SW Washington, DC 20585 en Nevada Deploys First U.S. Commercial, Grid-Connected Enhanced Geothermal System http://energy.gov/articles/nevada-deploys-first-us-commercial-grid-connected-enhanced-geothermal-system geothermal-system" class="title-link">Nevada Deploys First U.S. Commercial, Grid-Connected Enhanced Geothermal System

314

Mercury In Soils Of The Long Valley, California, Geothermal System | Open  

Open Energy Info (EERE)

In Soils Of The Long Valley, California, Geothermal System In Soils Of The Long Valley, California, Geothermal System Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Mercury In Soils Of The Long Valley, California, Geothermal System Details Activities (3) Areas (1) Regions (0) Abstract: An evaluation of the Hg distribution in soils of the Long Valley, California, geothermal area, was made. A1-horizon soil samples were collected utilizing a grid system from the resurgent dome area and the Long Valley area. In addition, samples were collected in five traverses across three fault systems and four traverses across east-west-oriented gullies to measure the importance of aspect. Additional samples were collected in an analysis of variance design to evaluate natural variability in soil composition with sampling interval distance. The primary objectives of this

315

Geothermal Systems are a Breath of Fresh Air for Illinois School District |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Geothermal Systems are a Breath of Fresh Air for Illinois School Geothermal Systems are a Breath of Fresh Air for Illinois School District Geothermal Systems are a Breath of Fresh Air for Illinois School District May 24, 2010 - 11:01am Addthis Each classroom has a geothermal unit installed. Although large, the units blend into surroundings and don’t produce excess noise. | Photo Courtesy of Sterling Public Schools Each classroom has a geothermal unit installed. Although large, the units blend into surroundings and don't produce excess noise. | Photo Courtesy of Sterling Public Schools Lindsay Gsell Superintendent Tad Everett had two priorities when deciding on a new system to replace the aging oil-based boiler heating and cooling systems for the seven schools in his district: improving learning environments and saving

316

Geothermal Systems are a Breath of Fresh Air for Illinois School District |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Geothermal Systems are a Breath of Fresh Air for Illinois School Geothermal Systems are a Breath of Fresh Air for Illinois School District Geothermal Systems are a Breath of Fresh Air for Illinois School District May 24, 2010 - 11:01am Addthis Each classroom has a geothermal unit installed. Although large, the units blend into surroundings and don’t produce excess noise. | Photo Courtesy of Sterling Public Schools Each classroom has a geothermal unit installed. Although large, the units blend into surroundings and don't produce excess noise. | Photo Courtesy of Sterling Public Schools Lindsay Gsell Superintendent Tad Everett had two priorities when deciding on a new system to replace the aging oil-based boiler heating and cooling systems for the seven schools in his district: improving learning environments and saving

317

Enhanced Geothermal Systems (EGS) R&D Program  

SciTech Connect

The purpose of this workshop was to develop technical background facts necessary for planning continued research and development of Enhanced Geothermal Systems (EGS). EGS are geothermal reservoirs that require improvement of their permeability or fluid contents in order to achieve economic energy production. The initial focus of this R&D program is devising and testing means to extract additional economic energy from marginal volumes of hydrothermal reservoirs that are already producing commercial energy. By mid-1999, the evolution of the EGS R&D Program, begun in FY 1988 by the U.S. Department of Energy (DOE), reached the stage where considerable expertise had to be brought to bear on what technical goals should be pursued. The main purpose of this Workshop was to do that. The Workshop was sponsored by the Office of Geothermal Technologies of the Department of Energy. Its purpose and timing were endorsed by the EGS National Coordinating Committee, through which the EGS R&D Program receives guidance from members of the U.S. geothermal industry. Section 1.0 of this report documents the EGS R&D Program Review Session. There, managers and researchers described the goals and activities of the program. Recent experience with injection at The Geysers and analysis of downhole conditions at Dixie Valley highlighted this session. Section 2.0 contains a number of technical presentations that were invited or volunteered to illuminate important technical and economic facts and opportunities for research. The emphasis here was on fi.acture creation, detection, and analysis. Section 3.0 documents the initial general discussions of the participants. Important topics that emerged were: Specificity of defined projects, Optimizing cost effectiveness, Main technical areas to work on, Overlaps between EGS and Reservoir Technology R&D areas, Relationship of microseismic events to hydraulic fractures, and Defining criteria for prioritizing research thrusts. Sections 4.0 and 5.0 report the meat of the Workshop. Section 4.0 describes the nomination and clarification of technical thrusts, and Section 5.0 reports the results of prioritizing those thrusts via voting by the participants. Section 6.0 contains two discussions conducted after the work on research thrusts. The topics were ''Simulation'' and ''Stimulation''. A number of technical points that emerged here provide important guidance for both practical field work on EGS systems and for research.

Entingh, Daniel J.

1999-08-18T23:59:59.000Z

318

Marketing the Klamath Falls Geothermal District Heating system  

SciTech Connect

The Klamath Falls Geothermal District Heating system was completed in 1981 and, until 1992, there was no formal marketing plan for the system. This lack of marketing and the system history of poor availability combined to reduce or eliminate interest in connecting on the part of local building owners and it served only the original 14 government buildings connected at start up. The revenue from these buildings, however, did not cover the entire cost of operating the system. As a result, the city was faced with a difficult decision - develop the revenue required to make the system self-supporting or shut it down. As a result, a marketing strategy for the system was developed. A flat rate was developed in which the rate is negotiable, but for most customers approximates 50% of the gas bill. In addition, the flat rate reduced customer retrofit costs because it is not necessary to buy a meter. Finally, the flat rate is a guaranteed value for the first 10 years of the contract. To reduce retrofit costs, the new marketing plan eliminates the requirement for a customer heat exchanger. New customers are now connected directly into the distribution system with district loop water used as the building heating medium. The state operates two programs which have been used in the marketing plan. The first of these is available only to taxable entities and is referred to as the Business Energy Tax Credit (BETC). This program offers business a 35% tax credit on the costs associated with connection to the geothermal district heat system (retrofit, design, permits, etc.). The second state program is the Small Energy Loan Program (SELP). This program will loan the entire cost of the energy project to the customer. The new marketing strategy for the Klamath Falls system has concentrated on offering the customer an attractive and easy to understand rate structure, reduced retrofit cost and complexity for this building along with an attractive package of financing and tax credits. 1 tab.

Rafferty, K. (Geo-Heat Center, Klamath Falls, OR (United States))

1993-08-01T23:59:59.000Z

319

Analysis of Geothermal Reservoir Stimulation Using Geomechanics...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

System (EGS) Reservoir; 2010 Geothermal Technology Program Peer Review Report Seismic Fracture Characterization Methods for Enhanced Geothermal Systems; 2010 Geothermal Technology...

320

Geothermal energy utilization with heat pipes  

Science Journals Connector (OSTI)

Several variants of heat pipes for utilization of geothermal energy and underground rock heat are studied. An...

L. L. Vasil'ev

1990-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain,  

Open Energy Info (EERE)

Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain, Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain, Humboldt County, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain, Humboldt County, Nevada Abstract Shallow exploration drilling on the west flank of Blue Mountain discovered sub economic gold mineralization and a spatially associated active geothermal system. The gold mineralization is an unusual example of an acid sulfate type epithermal system developed in pre Tertiary sedimentary host rocks. The geothermal system is largely unexplored but is unusual in that surface manifestation s typically associated with active geothermal system are not present. Authors Andrew J. Parr and Timothy J. Percival

322

Thermodynamic analysis of a geothermal district heating system  

Science Journals Connector (OSTI)

Thermoeconomic analysis is considered a useful tool for investigators in engineering and other disciplines due to its methodology based on the quantities exergy, cost, energy and mass. This study deals with an investigation of capital costs and thermodynamic losses for devices in the Balcova Geothermal District Heating Systems (BGDHS). Thermodynamic loss rate-to-capital cost ratios are used for components and the overall system, and a systematic correlation is found between capital cost and exergy loss (total or internal), but not between capital cost and energy loss or external exergy loss. This correlation may imply that devices in successful district heating system are configured so as to achieve an overall optimal design, by balancing the thermodynamic (exergy-based) and economic characteristics of the overall system and their devices. The results provide insights into the relations between thermodynamics and economics and help demonstrate the merits of exergy analysis.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer

2005-01-01T23:59:59.000Z

323

Groundwater Sampling At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al.,  

Open Energy Info (EERE)

Groundwater Sampling At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., Groundwater Sampling At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Groundwater Sampling At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., 1983) Exploration Activity Details Location Fenton Hill Hdr Geothermal Area Exploration Technique Groundwater Sampling Activity Date 1983 Usefulness not indicated DOE-funding Unknown References C. O. Grigsby, J. W. Tester, P. E. Trujillo, D. A. Counce, J. Abbott, C. E. Holley, L. A. Blatz (1983) Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ Geochemical Behavior Retrieved from "http://en.openei.org/w/index.php?title=Groundwater_Sampling_At_Fenton_Hill_Hdr_Geothermal_Area_(Grigsby,_Et_Al.,_1983)&oldid=689261"

324

Surface Gas Sampling At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al.,  

Open Energy Info (EERE)

Surface Gas Sampling At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., Surface Gas Sampling At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Surface Gas Sampling At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., 1983) Exploration Activity Details Location Fenton Hill Hdr Geothermal Area Exploration Technique Surface Gas Sampling Activity Date Usefulness not indicated DOE-funding Unknown References C. O. Grigsby, J. W. Tester, P. E. Trujillo, D. A. Counce, J. Abbott, C. E. Holley, L. A. Blatz (1983) Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ Geochemical Behavior Retrieved from "http://en.openei.org/w/index.php?title=Surface_Gas_Sampling_At_Fenton_Hill_Hdr_Geothermal_Area_(Grigsby,_Et_Al.,_1983)&oldid=689258

325

Injectivity Test At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., 1983)  

Open Energy Info (EERE)

Injectivity Test At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., 1983) Injectivity Test At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Injectivity Test At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., 1983) Exploration Activity Details Location Fenton Hill Hdr Geothermal Area Exploration Technique Injectivity Test Activity Date Usefulness not indicated DOE-funding Unknown References C. O. Grigsby, J. W. Tester, P. E. Trujillo, D. A. Counce, J. Abbott, C. E. Holley, L. A. Blatz (1983) Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ Geochemical Behavior Retrieved from "http://en.openei.org/w/index.php?title=Injectivity_Test_At_Fenton_Hill_Hdr_Geothermal_Area_(Grigsby,_Et_Al.,_1983)&oldid=511318

326

A New Gold Pan For The West- Discovering Blind Geothermal Systems With  

Open Energy Info (EERE)

Gold Pan For The West- Discovering Blind Geothermal Systems With Gold Pan For The West- Discovering Blind Geothermal Systems With Shallow Temperature Surveys Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: A New Gold Pan For The West- Discovering Blind Geothermal Systems With Shallow Temperature Surveys Details Activities (6) Areas (4) Regions (0) Abstract: The use of rapidly deployable 2-meter-deep shallow temperature surveys has led to the discovery of at least two blind geothermal systems in Nevada, USA and has helped to define the spatial extent of thermal anomalies at two other locations. At Teels Marsh, two shallow temperature anomalies with a combined strike length of almost 4 km were identified adjacent to a Quaternary fault on the west side of the playa. At Rhodes Marsh, a thermal anomaly at least 5 km long was located adjacent to

327

Geological interpretation of Mount Ciremai geothermal system from remote sensing and magneto-teluric analysis  

E-Print Network (OSTI)

The exploration of geothermal system at Mount Ciremai has been started since the early 1980s and has just been studied carefully since the early 2000s. Previous studies have detected the potential of geothermal system and also the groundwater mechanism feeding the system. This paper will discuss the geothermal exploration based on regional scale surface temperature analysis with Landsat image to have a more detail interpretation of the geological setting and magneto-telluric or MT survey at prospect zones, which identified by the previous method, to have a more exact and in depth local scale structural interpretation. Both methods are directed to pin point appropriate locations for geothermal pilot hole drilling and testing. We used four scenes of Landsat Enhanced Thematic Mapper or ETM+ data to estimate the surface manifestation of a geothermal system. Temporal analysis of Land Surface Temperature or LST was applied and coupled with field temperature measurement at seven locations. By combining the TTM with ...

Sumintadireja, Prihadi; Irawan, Dasapta E; Irawan, Diky; Fadillah, Ahmad

2015-01-01T23:59:59.000Z

328

Electronic Submersible Pump (ESP) Technology and Limitations with Respect to Geothermal Systems (Fact Sheet)  

SciTech Connect

The current state of geothermal technology has limitations that hinder the expansion of utility scale power. One limitation that has been discussed by the current industry is the limitation of Electric Submersible Pump (ESP) technology. With the exception of a few geothermal fields artificial lift technology is dominated by line shaft pump (LSP) technology. LSP's utilize a pump near or below reservoir depth, which is attached to a power shaft that is attached to a motor above ground. The primary difference between an LSP and an ESP is that an ESP motor is attached directly to the pump which eliminates the power shaft. This configuration requires that the motor is submersed in the geothermal resource. ESP technology is widely used in oil production. However, the operating conditions in an oil field vary significantly from a geothermal system. One of the most notable differences when discussing artificial lift is that geothermal systems operate at significantly higher flow rates and with the potential addition of Enhanced Geothermal Systems (EGS) even greater depths. The depths and flow rates associated with geothermal systems require extreme horsepower ratings. Geothermal systems also operate in a variety of conditions including but not limited to; high temperature, high salinity, high concentrations of total dissolved solids (TDS), and non-condensable gases.

Not Available

2014-09-01T23:59:59.000Z

329

Marketing the Klamath Falls Geothermal District Heating system  

SciTech Connect

The new marketing strategy for the Klamath Falls system has concentrated on offering the customer an attractive and easy to understand rate structure, reduced retrofit cost and complexity for his building along with an attractive package of financing and tax credits. Initial retrofit costs and life-cycle cost analysis have been conducted on 22 buildings to date. For some, the retrofit costs are simply too high for the conversion to make sense at current geothermal rates. For many, however, the prospects are good. At this writing, two new customers are now connected and operating with 5 to 8 more buildings committed to connect this construction season after line extensions are completed. This represents nearly a 60% increase in the number of buildings connected to the system and a 40% increase in system revenue.

Rafferty, K.

1993-06-01T23:59:59.000Z

330

Optimization of hybrid-water/air-cooled condenser in an enhanced turbine geothermal ORC system  

Energy.gov (U.S. Department of Energy (DOE))

DOE Geothermal Program Peer Review 2010 - Presentation. Project objective: To improve the efficiency and output variability of geothermal-based ORC power production systems with minimal water consumption by deploying: 1) a hybrid-water/air cooled condenser with low water consumption and 2) an enhanced turbine with high efficiency.

331

Research Initiative Will Demonstrate Low Temperature Geothermal Electrical Power Generation Systems Using Oilfield Fluids  

Energy.gov (U.S. Department of Energy (DOE))

The U.S. Department of Energy's (DOE) Geothermal Technologies Office (GTO) is announcing a new collaboration with the Office of Fossil Energy (FE) to demonstrate the versatility, reliability, and deployment capabilities of low-temperature geothermal electrical power generation systems using co-produced water from oilfield operations at the Rocky Mountain Oilfield Testing Center (RMOTC) in Wyoming.

332

Near-Term Developments in Geothermal Drilling  

SciTech Connect

The DOE Hard Rock Penetration program is developing technology to reduce the costs of drilling geothermal wells. Current projects include: R & D in lost circulation control, high temperature instrumentation, underground imaging with a borehole radar insulated drill pipe development for high temperature formations, and new technology for data transmission through drill pipe that can potentially greatly improve data rates for measurement while drilling systems. In addition to this work, projects of the Geothermal Drilling Organization are managed. During 1988, GDO projects include developments in five areas: high temperature acoustic televiewer, pneumatic turbine, urethane foam for lost circulation control, geothermal drill pipe protectors, an improved rotary head seals.

Dunn, James C.

1989-03-21T23:59:59.000Z

333

Helium isotopes in geothermal systems- Iceland, The Geysers, Raft River and  

Open Energy Info (EERE)

Helium isotopes in geothermal systems- Iceland, The Geysers, Raft River and Helium isotopes in geothermal systems- Iceland, The Geysers, Raft River and Steamboat Springs Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Helium isotopes in geothermal systems- Iceland, The Geysers, Raft River and Steamboat Springs Details Activities (3) Areas (3) Regions (0) Abstract: Helium isotope ratios have been measured in geothermal fluids from Iceland, The Geysers, Raft River, Steamboat Springs and Hawaii. These ratios have been interpreted in terms of the processes which supply He in distinct isotopic ratios (i.e. magmatic He, ~10 Ra; atmospheric He, R,sub>a; and crustal He, ~0.1 Ra) and in terms of the processes which can alter the isotopic ratio (hydrologic mixing, U-Th series alpha production and weathering release of crustal He, magma aging and

334

Seismic Fracture Characterization Methods for Enhanced Geothermal...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Seismic Fracture Characterization Methods for Enhanced Geothermal Systems Seismic Fracture Characterization Methods for Enhanced Geothermal Systems Project objective: Make Seismic...

335

Evaluation of C-14 as a natural tracer for injected fluids at theAidlin sector of The Geysers geothermal system through modeling ofmineral-water-gas Reactions  

SciTech Connect

A reactive-transport model for 14C was developed to test its applicability to the Aidlin geothermal system. Using TOUGHREACT, we developed a 1-D grid to evaluate the effects of water injection and subsequent water-rock-gas interaction on the compositions of the produced fluids. A dual-permeability model of the fracture-matrix system was used to describe reaction-transport processes in which the permeability of the fractures is many orders of magnitude higher than that of the rock matrix. The geochemical system included the principal minerals (K-feldspar, plagioclase, calcite, silica polymorphs) of the metagraywackes that comprise the geothermal reservoir rocks. Initial simulation results predict that the gas-phase CO2 in the reservoir will become more enriched in 14C as air-equilibrated injectate water (with a modern carbon signature) is incorporated into the system, and that these changes will precede accompanying decreases in reservoir temperature. The effects of injection on 14C in the rock matrix will be lessened somewhat because of the dissolution of matrix calcite with ''dead'' carbon.

Dobson, Patrick; Sonnenthal, Eric; Lewicki, Jennifer; Kennedy, Mack

2006-06-01T23:59:59.000Z

336

The Geothermal System Near Paisley Oregon: A Tectonomagmatic Framework for Understanding the Geothermal Resource Potential of Southeastern Oregon.  

E-Print Network (OSTI)

??The tectonic and magmatic framework of southeast Oregon provides the conditions necessary for the existence of geothermal energy resources. However, few detailed studies of geothermal (more)

Makovsky, Kyle Aaron

2013-01-01T23:59:59.000Z

337

Development of a Plan to Implement Enhanced Geothermal Systems (EGS) in the Animas Valley, New Mexico - Final Report - 07/26/2000 - 02/01/2001  

SciTech Connect

The concept of producing energy from hot dry rock (HDR), originally proposed in 1971 at the Los Alamos National Laboratory, contemplated the generation of electric power by injecting water into artificially created fractures in subsurface rock formations with high heat flow. Recognizing the inherent difficulties associated with HDR, the concept of Enhanced Geothermal Systems was proposed. This embraces the idea that the amount of permeability and fluid in geothermal resources varies across a spectrum, with HDR at one end, and conventional hydrothermal systems at the other. This report provides a concept for development of a ''Combined Technologies Project'' with construction and operation of a 6 MW (net) binary-cycle geothermal power plant that uses both the intermediate-depth hydrothermal system at 1,200 to 3,300 feet and a deeper EGS capable system at 3,000 to 4,000 feet. Two production/injection well pairs will be drilled, one couplet for the hydrothermal system, and one for the E GS system. High-pressure injection may be required to drive fluid through the EGS reservoir from the injection to the production well.

Schochet, Daniel N.; Cunniff, Roy A.

2001-02-01T23:59:59.000Z

338

The solubility and kinetics of minerals under CO2-EGS geothermal conditions: Comparison of experimental and modeling results  

E-Print Network (OSTI)

2000. A Hot Dry Rock geothermal energy concept utilizing2006. The Future of Geothermal Energy Impact of EnhancedU.S. Department of Energy, Geothermal Technologies Program,

Xu, T.

2014-01-01T23:59:59.000Z

339

Geothermal: Sponsored by OSTI -- Downhole heat exchanger system...  

Office of Scientific and Technical Information (OSTI)

Museum, Brannon Cottage, and the Community Center, Calistoga, CA. Feasibility study Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On Home...

340

A Demonstration System for Capturing Geothermal Energy from Mine...  

Open Energy Info (EERE)

MT Project Type Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type Topic 2 Topic Area 1: Technology Demonstration Projects Project...

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Large Scale Geothermal Exchange System for Residential, Office...  

Open Energy Info (EERE)

Project Type Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type Topic 2 Topic Area 1: Technology Demonstration Projects Project...

342

Enhancing geothermal heat pump systems with parametric performance analyses.  

E-Print Network (OSTI)

??Parametric performance analyses and comparison of a basic geothermal heat pump, a heat pump cycle with motor cooling/refrigerant preheating, and a heat pump cycle utilizing (more)

Self, Stuart

2010-01-01T23:59:59.000Z

343

Metal Organic Heat Carriers for Enhanced Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

DOE Geothermal Program Peer Review 2010 - Presentation. This project addresses Energy Conversion Barrier N -Inability to lower the temperature conditions under which EGS power generation is commercially viable.

344

Colorado Firm Develops Innovative Materials for Geothermal Systems...  

Energy Savers (EERE)

EERE, Composite Technology Development, Inc. advanced several technologies related to geothermal energy extraction. The company developed materials designed to create and...

345

Conduction-Dominated Geothermal Systems | Open Energy Information  

Open Energy Info (EERE)

Making. In: Proceedings. Thirty-Ninth Workshop on Geothermal Reservoir Engineering; 20140224; Stanford, California. Stanford, California: Stanford University; p. 8 Inga...

346

State Geothermal Resource Assessment and Data Collection Efforts  

Energy.gov (U.S. Department of Energy (DOE))

HawaiiNational Geothermal Data System Aids in Discovering Hawaii's Geothermal Resource (November 20, 2012)

347

Compound and Elemental Analysis At Fenton Hill Hdr Geothermal Area  

Open Energy Info (EERE)

Grigsby, Et Al., 1983) Grigsby, Et Al., 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Compound and Elemental Analysis At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., 1983) Exploration Activity Details Location Fenton Hill Hdr Geothermal Area Exploration Technique Compound and Elemental Analysis Activity Date Usefulness not indicated DOE-funding Unknown References C. O. Grigsby, J. W. Tester, P. E. Trujillo, D. A. Counce, J. Abbott, C. E. Holley, L. A. Blatz (1983) Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ Geochemical Behavior Retrieved from "http://en.openei.org/w/index.php?title=Compound_and_Elemental_Analysis_At_Fenton_Hill_Hdr_Geothermal_Area_(Grigsby,_Et_Al.,_1983)&oldid=511285

348

Property:HostRockLithology | Open Energy Information  

Open Energy Info (EERE)

HostRockLithology HostRockLithology Jump to: navigation, search Property Name HostRockLithology Property Type String Description Condensed description of the lithology of the reservoir rock. This is a property of type Page. Subproperties This property has the following 14 subproperties: B Beowawe Hot Springs Geothermal Area Brady Hot Springs Geothermal Area C Chena Geothermal Area D Desert Peak Geothermal Area G Geysers Geothermal Area H Heber Geothermal Area L Lightning Dock Geothermal Area R Raft River Geothermal Area Roosevelt Hot Springs Geothermal Area S Salton Sea Geothermal Area Steamboat Springs Geothermal Area S cont. Stillwater Geothermal Area V Valles Caldera - Sulphur Springs Geothermal Area W Wabuska Hot Springs Geothermal Area Pages using the property "HostRockLithology"

349

GEOLOGIC FRAMEWORK OF THE EAST FLANK, COSO GEOTHERMAL FIELD: IMPLICATIONS  

Open Energy Info (EERE)

GEOLOGIC FRAMEWORK OF THE EAST FLANK, COSO GEOTHERMAL FIELD: IMPLICATIONS GEOLOGIC FRAMEWORK OF THE EAST FLANK, COSO GEOTHERMAL FIELD: IMPLICATIONS FOR EGS DEVELOPMENT Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: GEOLOGIC FRAMEWORK OF THE EAST FLANK, COSO GEOTHERMAL FIELD: IMPLICATIONS FOR EGS DEVELOPMENT Details Activities (1) Areas (1) Regions (0) Abstract: The Coso Geothermal Field is a large, high temperature system located in eastern California on the western edge of the Basin and Range province. The East Flank of this field is currently under study as a DOE-funded Enhanced Geothermal Systems (EGS) project. This paper summarizes petrologic and geologic investigations on two East Flank wells, 34A-9 and 34-9RD2 conducted as part of a continuing effort to better understand how the rocks will behave during hydraulic and thermal stimulation. Well 34A-9

350

Digital Mapping Of Structurally Controlled Geothermal Features With GPS  

Open Energy Info (EERE)

Digital Mapping Of Structurally Controlled Geothermal Features With GPS Digital Mapping Of Structurally Controlled Geothermal Features With GPS Units And Pocket Computers Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features With GPS Units And Pocket Computers Abstract Hand-held global positioning system (GPS) units and pocket personal computers (PCs) were used to map surface geothermal features at the Bradys Hot Springs and Salt Wells geothermal systems, Churchill County, Nevada, in less time and with greater accuracy than would have been possible with conventional mapping methods. Geothermal features that were mapped include fumaroles, mud pots, warm ground, sinter, and a variety of silicified rocks. In both areas, the digital mapping was able to resolve structural

351

International Partnership for Geothermal Technology - 2012 Peer...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

River Geothermal Drilling Project Canada The Snake River Geothermal Drilling Project GermanyEU Toward the Understanding of Induced Seismicity in Enhanced Geothermal Systems...

352

SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL  

E-Print Network (OSTI)

faults and wells, Cerro Prieto geothermal field, Mexico (faults and wells, Cerro Prieto geothermal field, Mexico (geothermal system in Mexico and the Pleasant Bayou exploratory geopressured well

Narasimhan, T.N.

2013-01-01T23:59:59.000Z

353

Geothermal energy technology and current status: an overview  

Science Journals Connector (OSTI)

Geothermal energy is the energy contained as heat in the Earths interior. This overview describes the internal structure of the Earth together with the heat transfer mechanisms inside mantle and crust. It also shows the location of geothermal fields on specific areas of the Earth. The Earths heat flow and geothermal gradient are defined, as well as the types of geothermal fields, the geologic environment of geothermal energy, and the methods of exploration for geothermal resources including drilling and resource assessment. Geothermal energy, as natural steam and hot water, has been exploited for decades to generate electricity, and both in space heating and industrial processes. The geothermal electrical installed capacity in the world is 7974 \\{MWe\\} (year 2000), and the electrical energy generated is 49.3 billion kWh/year, representing 0.3 % of the world total electrical energy which was 15,342 billion kWh in 2000. In developing countries, where total installed electrical power is still low, geothermal energy can play a significant role: in the Philippines 21% of electricity comes from geothermal steam, 20% in El Salvador, 17% in Nicaragua, 10% in Costa Rica and 8% in Kenya. Electricity is produced with an efficiency of 1017%. The geothermal kWh is generally cost-competitive with conventional sources of energy, in the range 210 UScents/kWh, and the geothermal electrical capacity installed in the world (1998) was 1/5 of that from biomass, but comparable with that from wind sources. The thermal capacity in non-electrical uses (greenhouses, aquaculture, district heating, industrial processes) is 15,14 \\{MWt\\} (year 2000). Financial investments in geothermal electrical and non-electrical uses world-wide in the period 19731992 were estimated at about US$22,000 million. Present technology makes it possible to control the environmental impact of geothermal exploitation, and an effective and easily implemented policy to encourage geothermal energy development, and the abatement of carbon dioxide emissions would take advantage from the imposition of a carbon tax. The future use of geothermal energy from advanced technologies such as the exploitation of hot dry rock/hot wet rock systems, magma bodies and geopressured reservoirs, is briefly discussed. While the viability of hot dry rock technology has been proven, research and development are still necessary for the other two sources. A brief discussion on training of specialists, geothermal literature, on-line information, and geothermal associations concludes the review.

Enrico Barbier

2002-01-01T23:59:59.000Z

354

Life-cycle analysis results of geothermal systems in comparison to other power systems.  

SciTech Connect

A life-cycle energy and greenhouse gas emissions analysis has been conducted with Argonne National Laboratory's expanded Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) model for geothermal power-generating technologies, including enhanced geothermal, hydrothermal flash, and hydrothermal binary technologies. As a basis of comparison, a similar analysis has been conducted for other power-generating systems, including coal, natural gas combined cycle, nuclear, hydroelectric, wind, photovoltaic, and biomass by expanding the GREET model to include power plant construction for these latter systems with literature data. In this way, the GREET model has been expanded to include plant construction, as well as the usual fuel production and consumption stages of power plant life cycles. For the plant construction phase, on a per-megawatt (MW) output basis, conventional power plants in general are found to require less steel and concrete than renewable power systems. With the exception of the concrete requirements for gravity dam hydroelectric, enhanced geothermal and hydrothermal binary used more of these materials per MW than other renewable power-generation systems. Energy and greenhouse gas (GHG) ratios for the infrastructure and other life-cycle stages have also been developed in this study per kilowatt-hour (kWh) of electricity output by taking into account both plant capacity and plant lifetime. Generally, energy burdens per energy output associated with plant infrastructure are higher for renewable systems than conventional ones. GHG emissions per kWh of electricity output for plant construction follow a similar trend. Although some of the renewable systems have GHG emissions during plant operation, they are much smaller than those emitted by fossil fuel thermoelectric systems. Binary geothermal systems have virtually insignificant GHG emissions compared to fossil systems. Taking into account plant construction and operation, the GREET model shows that fossil thermal plants have fossil energy use and GHG emissions per kWh of electricity output about one order of magnitude higher than renewable power systems, including geothermal power.

Sullivan, J. L.; Clark, C. E.; Han, J.; Wang, M.; Energy Systems

2010-10-11T23:59:59.000Z

355

DOE Funds 21 Research, Development and Demonstration Projects for up to $78 Million to Promote Enhanced Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

Today at the National Geothermal Conference in Reno, Nev., Deputy Assistant Secretary for Renewable Energy Steve Chalk announced the U.S. Department of Energy's (DOE) awards under a Funding Opportunity Announcement (FOA) for research, development and demonstration of Enhanced Geothermal Systems (EGS) for next-generation geothermal energy technologies.

356

GRR/Section 7-HI-a - Geothermal and Cable System Development Permit | Open  

Open Energy Info (EERE)

GRR/Section 7-HI-a - Geothermal and Cable System Development Permit GRR/Section 7-HI-a - Geothermal and Cable System Development Permit < GRR Jump to: navigation, search GRR-logo.png GEOTHERMAL REGULATORY ROADMAP Roadmap Home Roadmap Help List of Sections Section 7-HI-a - Geothermal and Cable System Development Permit 07HIAGeothermalAndCableSystemDevelopmentPermitting.pdf Click to View Fullscreen Contact Agencies Hawaii Department of Land and Natural Resources Engineering Division Regulations & Policies Hawaii Revised Statute 196D Hawaii Administrative Rules 13-185 Hawaii Revised Statute 205-3.1 Revised Statute 205-5. Triggers None specified Click "Edit With Form" above to add content 07HIAGeothermalAndCableSystemDevelopmentPermitting.pdf 07HIAGeothermalAndCableSystemDevelopmentPermitting.pdf Error creating thumbnail: Page number not in range.

357

Sales and Use Tax Exemption for Solar and Geothermal Systems | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar and Geothermal Systems Solar and Geothermal Systems Sales and Use Tax Exemption for Solar and Geothermal Systems < Back Eligibility Commercial General Public/Consumer Installer/Contractor Residential Savings Category Energy Sources Buying & Making Electricity Solar Heating & Cooling Commercial Heating & Cooling Heating Water Heating Program Info Start Date 7/1/2007 State Connecticut Program Type Sales Tax Incentive Rebate Amount 100% exemption Provider Connecticut Department of Revenue Services Connecticut enacted legislation in June 2007 (H.B. 7432) that established a sales and use tax exemption for solar energy equipment and geothermal resource systems. H.B. 7432 added passive and active solar water-heating systems, passive and active solar space-heating systems, and solar-electric

358

A problem posed by vapour-dominated geothermal systems  

Science Journals Connector (OSTI)

... in wells drilled to different depths, as shown in Fig. 1 for the Kamojang geothermal field in Indonesia. The water table lies 100-150 m below ground surface. From ... . Pressure profiles similar to that in Fig. 1 have been published for the Lardarello geothermal field1.

Gerald Schubert; Joe M. Straus; Malcolm A. Grant

1980-10-02T23:59:59.000Z

359

2011 Napa Hedberg Research Conference report on enhanced geothermal systems  

Science Journals Connector (OSTI)

...Many other new developments in geophysics...optimize injection strategies to minimize seismicity...flow rate. The development of a geothermal...from the oil and gas industry, but...supercritical turbines for geothermal...dwarfing the oil and gas resource. Once...continued technology development, large-scale...

Dag Nummedal; Gary Isaksen; Peter Malin

360

40AR/39AR THERMAL HISTORY OF THE COSO GEOTHERMAL FIELD | Open Energy  

Open Energy Info (EERE)

AR/39AR THERMAL HISTORY OF THE COSO GEOTHERMAL FIELD AR/39AR THERMAL HISTORY OF THE COSO GEOTHERMAL FIELD Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: 40AR/39AR THERMAL HISTORY OF THE COSO GEOTHERMAL FIELD Details Activities (1) Areas (1) Regions (0) Abstract: The age of the geothermal system and the granitic host rock at Coso geothermal system in California is poorly known. This is mainly due to a paucity of vein-type minerals (e.g. adularia, sericite) that can be directly dated. A downhole 40Ar/39Ar thermochronology study of granitic host-rock Kfeldspar is presently being undertaken at the New Mexico Geochronology Research Laboratory at New Mexico Tech. The technique couples the measurement of argon loss from K-feldspar and knowledge of the diffusion parameters of transport in K-feldspar to estimate the longevity

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Performance investigation of two geothermal district heating systems for building applications: Energy analysis  

Science Journals Connector (OSTI)

The energetic performance of Balcova geothermal district heating system (BGDHS) and Salihli geothermal district heating system (SGDHS) installed in Turkey is investigated for building applications in this study. The essential components (e.g., pumps, heat exchangers) of these geothermal district heating systems are also included in the modeling. The present model is employed for system analysis and energetic performance evaluation of the geothermal district heating systems. Energy flow diagrams are drawn to exhibit the input and output energies and losses to the surroundings by using the 2003 and 2004 heating season actual data. In addition, energy efficiencies are studied for comparison purposes, and are found to be 39.36% for BGDHS and 59.31% for SGDHS, respectively.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer

2006-01-01T23:59:59.000Z

362

Geothermal: Sponsored by OSTI -- Sustaining the National Geothermal...  

Office of Scientific and Technical Information (OSTI)

Sustaining the National Geothermal Data System: Considerations for a System Wide Approach and Node Maintenance, Geothermal Resources Council 37th Annual Meeting, Las Vegas, Nevada,...

363

Geological and geophysical analysis of Coso Geothermal Exploration Hole No.  

Open Energy Info (EERE)

and geophysical analysis of Coso Geothermal Exploration Hole No. and geophysical analysis of Coso Geothermal Exploration Hole No. 1 (CGEH-1), Coso Hot Springs KGRA, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Geological and geophysical analysis of Coso Geothermal Exploration Hole No. 1 (CGEH-1), Coso Hot Springs KGRA, California Details Activities (5) Areas (1) Regions (0) Abstract: The Coso Geothermal Exploration Hole number one (CGEH-1) was drilled in the Coso Hot Springs KGRA, California, from September 2 to December 2, 1977. Chip samples were collected at ten foot intervals and extensive geophysical logging surveys were conducted to document the geologic character of the geothermal system as penetrated by CGEH-1. The major rock units encountered include a mafic metamorphic sequence and a

364

Petrography Analysis At Raft River Geothermal Area (2011) | Open Energy  

Open Energy Info (EERE)

Petrography Analysis At Raft River Geothermal Area (2011) Petrography Analysis At Raft River Geothermal Area (2011) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Petrography Analysis At Raft River Geothermal Area (2011) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Petrography Analysis Activity Date 2011 Usefulness not indicated DOE-funding Unknown Exploration Basis Explore for development of an EGS demonstration project Notes X-ray diffraction and thin section analyses are being conducted on samples from 5 deep wells, RRG- 1, 2, 3, 7 and 9, to determine the characteristics of the rock types and hydrothermal alteration within the geothermal system. Thin section analyses of samples from RRG-9 document the presence of strong alteration and brecciation at the contact between the Tertiary and basement

365

Property:Geothermal/LegalNameOfAwardee | Open Energy Information  

Open Energy Info (EERE)

LegalNameOfAwardee LegalNameOfAwardee Jump to: navigation, search Property Name Geothermal/LegalNameOfAwardee Property Type String Description Legal Name of Awardee Pages using the property "Geothermal/LegalNameOfAwardee" Showing 13 pages using this property. A A 3D-3C Reflection Seismic Survey and Data Integration to Identify the Seismic Response of Fractures and Permeable Zones Over a Known Geothermal Resource at Soda Lake, Churchill Co., NV Geothermal Project + Magma Energy (U.S.) Corp. + A new analytic-adaptive model for EGS assessment, development and management support Geothermal Project + Board of Regents, NSHE, on behalf of UNR + An Integrated Experimental and Numerical Study: Developing a Reaction Transport Model that Couples Chemical Reactions of Mineral Dissolution/Precipitation with Spatial and Temporal Flow Variations in CO2/Brine/Rock Systems Geothermal Project + Regents of the University of Minnesota +

366

Geochemistry of the Wendel-Amedee Geothermal System-California | Open  

Open Energy Info (EERE)

Geochemistry of the Wendel-Amedee Geothermal System-California Geochemistry of the Wendel-Amedee Geothermal System-California Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Geochemistry of the Wendel-Amedee Geothermal System-California Abstract The fluid chemistry of the geothermal system that feed Amedee and Wendel Hot Springs in eastern California is complex. Two thermal fluids have been identified based on the concentrations of the conservative elements C1 and B, fluid enthalpies, and the application of chemical geothermometers. One is characterized by temperatures above 120°C and a TDS content of 1300 ppm, and will be used by GeoProducts Corporation to produce electricity. The second did lower in temperature, 75°C, and has a TDS content of 650 ppm. This fluid may be used fore direct heat application at the Susanville

367

Hydrothermal spallation drilling and advanced energy conversion technologies for Engineered Geothermal Systems  

E-Print Network (OSTI)

The purpose of this research was to study the various factors affecting the economic and technical feasibility of Engineered Geothermal Systems, with a special emphasis on advanced drilling technologies. The first part of ...

Augustine, Chad R

2009-01-01T23:59:59.000Z

368

Method for inhibiting silica precipitation and scaling in geothermal flow systems  

DOE Patents (OSTI)

A method for inhibiting silica scaling and precipitation in geothermal flow systems by on-line injection of low concentrations of cationic nitrogen-containing compounds, particularly polymeric imines, polymeric amines, and quaternary ammonium compounds is described.

Harrar, J.E.; Lorensen, L.E.; Locke, F.E.

1980-06-13T23:59:59.000Z

369

An advanced geothermal drilling system: Component options and limitations  

SciTech Connect

The historical developments of drilling technology for geothermal resources have followed traditional incremental trends. The local expertise and rigs were adapted from existing drill rigs used for mining, civil, and water well projects. In areas with hydrocarbon resources, petroleum drilling hardware has been adapted; and in other countries, these units were imported as depth requirements increased and more robust derricks and downhole tools were needed. This ad hoc approach has provided adequate exploration and production wells. In contrast to the incremental improvements in petroleum rotary drilling system components this paper reviews a new, purpose-developed system that would solve the known major problems by design. Performance goals of 4 km (12,000 ft.) depth, 400 C, (750 F) and penetration rates greater than 8 m/h (25 ft/h) were selected. This advanced system was reviewed extensively and estimates of perhaps 30 to 60% cost savings were projected, depending on the assumed effectiveness and performance improvements provided. This paper continues the design and feasibility study and presents some of the component and sub-system details developed thus far.

Rowley, J. [Pajarito Enterprises, Los Alamos, NM (United States); Saito, Seiji [JMC Geothermal Division, Tokyo (Japan); Long, R.C. [Department of Energy, Las Vegas, NV (United States). Yucca Mountain Site Characterization Project

1995-12-31T23:59:59.000Z

370

Exergoeconomic optimization of integrated geothermal system in Simav, Kutahya  

Science Journals Connector (OSTI)

The aim of this study is to investigate the integrated use of the geothermal resources in the KutahyaSimav region, Turkey. Although geothermal energy has been in use for years in the others countries, the integrated use of the geothermal fluid is new in Turkey. The high temperature level of the geothermal fluid in the Simav field makes it possible to utilize it for electricity generation, space heating and balneology. In this regard, a multiple complex has been proposed there in order to use the energy of the geothermal fluid more efficiently. Therefore, the possibility of electricity generation by a binary cycle has been preliminarily researched. After the electricity generation process, the waste geothermal fluid has been conducted to residences and greenhouses later for heating purpose in the field. In this regard, twenty one different models have been formed and analyzed using exergy and LCC methods. As a conclusion, the pre-feasibility study indicates that utilization of this geothermal capacity for multiple uses would be an attractive investment for Simav region.

Oguz Arslan; Ramazan Kose

2010-01-01T23:59:59.000Z

371

The Future of Geothermal Energy  

E-Print Network (OSTI)

The Future of Geothermal Energy Impact of Enhanced Geothermal Systems (EGS) on the United States in the 21st Century #12;The Future of Geothermal Energy Impact of Enhanced Geothermal Systems (EGS and Renewable Energy, Office of Geothermal Technologies, Under DOE Idaho Operations Office Contract DE-AC07-05ID

Laughlin, Robert B.

372

Air-Cooled Condensers in Next-Generation Conversion Systems Geothermal Lab  

Open Energy Info (EERE)

Air-Cooled Condensers in Next-Generation Conversion Systems Geothermal Lab Air-Cooled Condensers in Next-Generation Conversion Systems Geothermal Lab Call Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Air-Cooled Condensers in Next-Generation Conversion Systems Project Type / Topic 1 Laboratory Call for Submission of Applications for Research, Development and Analysis of Geothermal Technologies Project Type / Topic 2 Air-Cooling Project Description As the geothermal industry moves to use geothermal resources that are more expensive to develop, there will be increased incentive to use more efficient power plants. Because of increasing demand on finite supplies of water, this next generation of more efficient plants will likely need to reject heat sensibly to the ambient (air-cooling). This will be especially true in western states having higher grade Enhanced Geothermal Systems (EGS) resources, as well as most hydrothermal resources. If one had a choice, an evaporative heat rejection system would be selected because it would provide both cost and performance advantages. The evaporative system, however, consumes a significant amount of water during heat rejection that would require makeup. Though they use no water, air-cooling systems have higher capital costs, reduced power output (heat is rejected at a higher temperature), lower power sales due to higher parasitics (fan power), and greater variability in power output (because of large variation in the dry-bulb temperature).

373

PROCEEDINGS, Thirty-Sixth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, January 31 -February 2, 2011  

E-Print Network (OSTI)

strategies involve reservoir stimulation to overcome the lack of porosity and/or permeability of the rock of geological conditions such as presence of hydrothermal fluid, high heat flux, high rock permeability and/or high rock porosity. Enhanced (or Engineered) Geothermal systems (EGS) are an attempt to exploit

Stanford University

374

Property:HostRockAge | Open Energy Information  

Open Energy Info (EERE)

HostRockAge HostRockAge Jump to: navigation, search Property Name HostRockAge Property Type String Description Describes the age of the reservoir rock by epoch, era, or period per available data. This is a property of type Page. Subproperties This property has the following 10 subproperties: B Beowawe Hot Springs Geothermal Area Brady Hot Springs Geothermal Area C Chena Geothermal Area D Desert Peak Geothermal Area G Geysers Geothermal Area R Raft River Geothermal Area Roosevelt Hot Springs Geothermal Area S Salton Sea Geothermal Area Steamboat Springs Geothermal Area W Wabuska Hot Springs Geothermal Area Pages using the property "HostRockAge" Showing 11 pages using this property. A Amedee Geothermal Area + Mesozoic + B Blue Mountain Geothermal Area + Triassic + C Coso Geothermal Area + Mesozoic +

375

Geothermal/Exploration | Open Energy Information  

Open Energy Info (EERE)

Geothermal/Exploration Geothermal/Exploration < Geothermal Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Land Use Leasing Exploration Well Field Power Plant Transmission Environment Water Use Print PDF Geothermal Exploration General Techniques Tree Techniques Table Regulatory Roadmap NEPA (120) Geothermal springs along Yellowstone National Park's Firehole River in the cool air of autumn. The world's most environmentally sensitive geothermal features are protected by law. Geothermal Exploration searches the earth's subsurface for geothermal resources that can be extracted for the purpose of electricity generation. A geothermal resource is as commonly a volume of hot rock and water, but in the case of EGS, is simply hot rock. Geothermal exploration programs utilize a variety of techniques to identify geothermal reservoirs as well

376

Session: Hard Rock Penetration  

SciTech Connect

This session at the Geothermal Energy Program Review X: Geothermal Energy and the Utility Market consisted of five presentations: ''Hard Rock Penetration - Summary'' by George P. Tennyson, Jr.; ''Overview - Hard Rock Penetration'' by James C. Dunn; ''An Overview of Acoustic Telemetry'' by Douglas S. Drumheller; ''Lost Circulation Technology Development Status'' by David A. Glowka; ''Downhole Memory-Logging Tools'' by Peter Lysne.

Tennyson, George P. Jr.; Dunn, James C.; Drumheller, Douglas S.; Glowka, David A.; Lysne, Peter

1992-01-01T23:59:59.000Z

377

Overview of Geothermal Energy Development  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Geothermal Energy Geothermal Energy Development Kermit Witherbee Geothermal Geologist/Analyst DOE Office of Indian Energy Webcast: Overview of Geothermal Energy Development Tuesday, January 10, 2012 Geothermal Geology and Resources Environmental Impacts Geothermal Technology - Energy Conversion Geothermal Leasing and Development 2 PRESENTATION OUTLINE GEOTHERMAL GEOLOGY AND RESOURCES 3 Geology - Plate Tectonics 4 Plate Tectonic Processes Schematic Cross-Section "Extensional" Systems- "Rifting" Basin and Range Rio Grand Rift Imperial Valley East Africa Rift Valley "Magmatic" Systems Cascade Range 6 Geothermal Resources(USGS Fact Sheet 2008-3062) 7 State Systems

378

Seismic Fracture Characterization Methods for Enhanced Geothermal...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Seismic Fracture Characterization Methods for Enhanced Geothermal Systems; 2010 Geothermal Technology Program Peer Review Report Seismic Fracture Characterization Methods for...

379

3rd Rock Systems and Technologies | Open Energy Information  

Open Energy Info (EERE)

Rock Systems and Technologies Rock Systems and Technologies Jump to: navigation, search Name 3rd Rock Systems and Technologies Place Burlingame, California Zip 94010 Sector Renewable Energy, Services Product Provides proven renewable energy technologies and consulting services to residential, commercial, and industrial clients. Coordinates 38.753055°, -95.834619° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.753055,"lon":-95.834619,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

380

TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID-INCLUSION  

Open Energy Info (EERE)

TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID-INCLUSION TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID-INCLUSION GAS CHEMISTRY Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: TRACING FLUID SOURCES IN THE COSO GEOTHERMAL SYSTEM USING FLUID-INCLUSION GAS CHEMISTRY Details Activities (1) Areas (1) Regions (0) Abstract: Vein and alteration assemblages from eight Coso wells have been collected and their fluid-inclusion gases analyzed by quadrupole mass spectrometry. Four major types of alteration were sampled: 1) young calcite-hematite-pyrite veins; 2) wairakite or epidote veins and alteration that are spatially associated with deep reservoirs in the main field and eastern wells; 3) older sericite and pyrite wallrock alteration; and 4) stilbite-calcite veins that are common in cooler or marginal portions of

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
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381

Integrated mineralogical and fluid inclusion study of the Coso geothermal  

Open Energy Info (EERE)

mineralogical and fluid inclusion study of the Coso geothermal mineralogical and fluid inclusion study of the Coso geothermal systems, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Integrated mineralogical and fluid inclusion study of the Coso geothermal systems, California Details Activities (1) Areas (1) Regions (0) Abstract: Coso is one of several high-temperature geothermal systems on the margins of the Basin and Range province that is associated with recent volcanic activity. This system, which is developed entirely in fractured granitic and metamorphic rocks, consists of a well-defined thermal plume that originates in the southern part of the field and then flows upward and laterally to the north. Fluid inclusion homogenization temperatures and salinities demonstrate that cool, low salinity ground waters were present

382

National Geothermal Data System Deployed to Serve Industry |...  

Office of Environmental Management (EM)

information from all 50 states and enough raw data to pinpoint elusive sweet spots of geothermal energy deep in the earth. This best-in-class data collection and usability...

383

Google.org Invests $10 Million in Enhanced Geothermal Systems...  

Energy Savers (EERE)

of hot water or steam where none existed before or to extend and enhance an existing geothermal reservoir. Google.org will invest 4 million in Potter Drilling, Inc., which is...

384

Development of a geothermal acoustic borehole televiewer  

SciTech Connect

Most geothermal wells are drilled in hard rock formations where fluid flow is through systems of open fractures. Productivity of these wells is usually determined by the extent of intersection of the wellbore with the fracture system. A need exists for fracture mapping methods and tools which can operate in a geothermal environment. In less hostile environments, the acoustic borehole televiewer has been shown to be a useful tool for determining location, orientation, and characterization of fractures as they intersect the borehole and for general wellbore and casing inspection. The development conducted at Sandia National Laboratories to adapt an acoustic borehole televiewer for operation in a geothermal environment is described. The modified instrument has been successfully tested at temperatures as high as 280/sup 0/C and pressures up to 5000 psi, and used successfully to map fractures and casing damage in geothermal wells.

Heard, F.E.; Bauman, T.J.

1983-08-01T23:59:59.000Z

385

Geothermal Direct Use | Open Energy Information  

Open Energy Info (EERE)

Direct Use Direct Use Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF [edit] Geothermal Direct Use Geothermal Technologies There are many types of Geothermal Technologies that take advantage of the earth's heat: Hydrothermal Systems Enhanced Geothermal Systems (EGS) Sedimentary Geothermal Systems Co-Produced Geothermal Systems Geothermal Direct Use Ground Source Heat Pumps Direct Use Links Related documents and websites EERE's Direct Use Report National Institute of Building Science's Whole Building Design Guide Policy Makers' Guidebook for Geothermal Heating and Cooling Dictionary.png Geothermal Direct Use: Low- to moderate-temperature water from geothermal reservoirs can be used to provide heat directly to buildings, or other applications that require

386

Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report  

SciTech Connect

The Engineered Geothermal System (EGS) Exploration Methodology Project is developing an exploration approach for EGS through the integration of geoscientific data. The Project chose the Dixie Valley Geothermal System in Nevada as a field laboratory site for methodlogy calibration purposes because, in the public domain, it is a highly characterized geothermal systems in the Basin and Range with a considerable amount of geoscience and most importantly, well data. This Baseline Conceptual Model report summarizes the results of the first three project tasks (1) collect and assess the existing public domain geoscience data, (2) design and populate a GIS database, and (3) develop a baseline (existing data) geothermal conceptual model, evaluate geostatistical relationships, and generate baseline, coupled EGS favorability/trust maps from +1km above sea level (asl) to -4km asl for the Calibration Area (Dixie Valley Geothermal Wellfield) to identify EGS drilling targets at a scale of 5km x 5km. It presents (1) an assessment of the readily available public domain data and some proprietary data provided by Terra-Gen Power, LLC, (2) a re-interpretation of these data as required, (3) an exploratory geostatistical data analysis, (4) the baseline geothermal conceptual model, and (5) the EGS favorability/trust mapping. The conceptual model presented applies to both the hydrothermal system and EGS in the Dixie Valley region.

Iovenitti, Joe

2013-05-15T23:59:59.000Z

387

Dixie Valley Engineered Geothermal System Exploration Methodology Project, Baseline Conceptual Model Report  

DOE Data Explorer (OSTI)

The Engineered Geothermal System (EGS) Exploration Methodology Project is developing an exploration approach for EGS through the integration of geoscientific data. The Project chose the Dixie Valley Geothermal System in Nevada as a field laboratory site for methodlogy calibration purposes because, in the public domain, it is a highly characterized geothermal systems in the Basin and Range with a considerable amount of geoscience and most importantly, well data. This Baseline Conceptual Model report summarizes the results of the first three project tasks (1) collect and assess the existing public domain geoscience data, (2) design and populate a GIS database, and (3) develop a baseline (existing data) geothermal conceptual model, evaluate geostatistical relationships, and generate baseline, coupled EGS favorability/trust maps from +1km above sea level (asl) to -4km asl for the Calibration Area (Dixie Valley Geothermal Wellfield) to identify EGS drilling targets at a scale of 5km x 5km. It presents (1) an assessment of the readily available public domain data and some proprietary data provided by Terra-Gen Power, LLC, (2) a re-interpretation of these data as required, (3) an exploratory geostatistical data analysis, (4) the baseline geothermal conceptual model, and (5) the EGS favorability/trust mapping. The conceptual model presented applies to both the hydrothermal system and EGS in the Dixie Valley region.

Joe Iovenitti

388

Hydrothermal Systems Rock Deformation and Geodynamics  

E-Print Network (OSTI)

Update Seminar Process Modelling of Hydrothermal Systems using SHEMAT / Processing SHEMAT 20 - 22 August to develop a process understanding of reactive transport in hydrothermal systems and to make responsible.rwth-academy.com/geophysics.html With contributions from #12;Process Modelling of Hydrothermal Systems using SHEMAT / Processing SHEMAT Hydrothermal

389

Value analysis of advanced heat rejection systems for geothermal power plants  

SciTech Connect

A computer model is developed to evaluate the performance of the binary geothermal power plants (Organic Rankine Cycles) with various heat rejection systems and their impact on the levelized cost of electricity. The computer model developed in this work is capable of simulating the operation of a geothermal power plant which consists mainly of an Organic Rankine Cycle (binary plants) with different types of working fluids such as pure hydrocarbons and some binary mixtures of the most promising combinations of hydrocarbons.

Bliem, C. [CJB Consulting, Longmont, CO (United States); Zangrando, F.; Hassani, V. [National Renewable Energy Lab., Golden, CO (United States)

1996-04-10T23:59:59.000Z

390

Geothermal: Sponsored by OSTI -- Creation of an Enhanced Geothermal...  

Office of Scientific and Technical Information (OSTI)

Creation of an Enhanced Geothermal System through Hydraulic and Thermal Stimulation Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On Home...

391

Rock-physics Models for Gas-hydrate Systems Associated  

E-Print Network (OSTI)

Rock-physics Models for Gas-hydrate Systems Associated with Unconsolidated Marine Sediments Diana associated with unconsolidated marine sediments. The goals are to predict gas-hydrate concentration from intercalated with unconsolidated sediments. We show that the geometrical details of how gas hy- drates

Texas at Austin, University of

392

Petrography of late cenozoic sediments, Raft River geothermal field, Idaho  

Open Energy Info (EERE)

of late cenozoic sediments, Raft River geothermal field, Idaho of late cenozoic sediments, Raft River geothermal field, Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Petrography of late cenozoic sediments, Raft River geothermal field, Idaho Details Activities (1) Areas (1) Regions (0) Abstract: GEOTHERMAL ENERGY; RAFT RIVER VALLEY; GEOTHERMAL FIELDS; PETROGRAPHY; BIOTITE; CALCITE; CLAYS; LIMESTONE; PYRITE; SANDSTONES; SEDIMENTS; SHALES; VOLCANIC ROCKS; ZEOLITES; ALKALINE EARTH METAL COMPOUNDS; CALCIUM CARBONATES; CALCIUM COMPOUNDS; CARBON COMPOUNDS; CARBONATE ROCKS; CARBONATES; CHALCOGENIDES; IDAHO; IGNEOUS ROCKS; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; IRON COMPOUNDS; IRON SULFIDES; MICA; MINERALS; NORTH AMERICA; ORES; OXYGEN COMPOUNDS; PACIFIC NORTHWEST REGION; PYRITES; ROCKS; SEDIMENTARY ROCKS; SULFIDES; SULFUR COMPOUNDS;

393

High-Temperature Circuit Boards for use in Geothermal Well Monitoring  

Open Energy Info (EERE)

Temperature Circuit Boards for use in Geothermal Well Monitoring Temperature Circuit Boards for use in Geothermal Well Monitoring Applications Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title High-Temperature Circuit Boards for use in Geothermal Well Monitoring Applications Project Type / Topic 1 Recovery Act: Enhanced Geothermal Systems Component Research and Development/Analysis Project Type / Topic 2 High-Temperature Downhole Tools Project Description Geothermal energy offers an abundant, renewable source of power that could be used to ensure the long-term energy independence of our nation. Currently, geothermal power in the United States is produced from relatively shallow wells that also contain naturally occurring water sources. These current geothermal power plants with near-ideal conditions for geothermal power production exist primarily in the western U.S. In order to expand the use of geothermal energy, new technologies are needed that will enable the utilization of the hot, dry rock located at depths up to 10 km. The introduction of water into these deep wells to create geothermal reservoirs is referred to as Enhanced Geothermal System (EGS).

394

Recovery Act: Geothermal Data Aggregation: Submission of Information into the National Geothermal Data System, Final Report DOE Project DE-EE0002852 June 24, 2014  

SciTech Connect

The National Geothermal Data System (NGDS) is a Department of Energy funded effort to create a single cataloged source for a variety of geothermal information through a distributed network of databases made available via web services. The NGDS will help identify regions suitable for potential development and further scientific data collection and analysis of geothermal resources as a source for clean, renewable energy. A key NGDS repository or node is located at Southern Methodist University developed by a consortium made up of: SMU Geothermal Laboratory Siemens Corporate Technology, a division of Siemens Corporation Bureau of Economic Geology at the University of Texas at Austin Cornell Energy Institute, Cornell University Geothermal Resources Council MLKay Technologies Texas Tech University University of North Dakota. The focus of resources and research encompass the United States with particular emphasis on the Gulf Coast (on and off shore), the Great Plains, and the Eastern U.S. The data collection includes the thermal, geological and geophysical characteristics of these area resources. Types of data include, but are not limited to, temperature, heat flow, thermal conductivity, radiogenic heat production, porosity, permeability, geological structure, core geophysical logs, well tests, estimated reservoir volume, in situ stress, oil and gas well fluid chemistry, oil and gas well information, and conventional and enhanced geothermal system related resources. Libraries of publications and reports are combined into a unified, accessible, catalog with links for downloading non-copyrighted items. Field notes, individual temperature logs, site maps and related resources are included to increase data collection knowledge. Additional research based on legacy data to improve quality increases our understanding of the local and regional geology and geothermal characteristics. The software to enable the integration, analysis, and dissemination of this teams NGDS contributions was developed by Siemens Corporate Technology. The SMU Node interactive application is accessible at http://geothermal.smu.edu. Additionally, files may be downloaded from either http://geothermal.smu.edu:9000/geoserver/web/ or through http://geothermal.smu.edu/static/DownloadFilesButtonPage.htm. The Geothermal Resources Council Library is available at https://www.geothermal-library.org/.

Blackwell, David D. [SMU Geothermal Laboratory; Chickering Pace, Cathy [SMU Geothermal Laboratory] (ORCID:0000000228898620); Richards, Maria C. [SMU Geothermal Laboratory

2014-06-24T23:59:59.000Z

395

Geothermal/Exploration | Open Energy Information  

Open Energy Info (EERE)

Geothermal/Exploration Geothermal/Exploration < Geothermal(Redirected from Exploration Techniques) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Land Use Leasing Exploration Well Field Power Plant Transmission Environment Water Use Print PDF Geothermal Exploration General Techniques Tree Techniques Table Regulatory Roadmap NEPA (120) Geothermal springs along Yellowstone National Park's Firehole River in the cool air of autumn. The world's most environmentally sensitive geothermal features are protected by law. Geothermal Exploration searches the earth's subsurface for geothermal resources that can be extracted for the purpose of electricity generation. A geothermal resource is as commonly a volume of hot rock and water, but in the case of EGS, is simply hot rock. Geothermal exploration programs

396

Geothermal FAQs | Department of Energy  

Office of Environmental Management (EM)

Back to Top 5. What is the visual impact of geothermal technologies? Answer: District heating systems and geothermal heat pumps are easily integrated into communities with almost...

397

Exergy analysis of two geothermal district heating systems for building applications  

Science Journals Connector (OSTI)

This study evaluates the exergetic performance of two local Turkish geothermal district heating systems through exergy analysis. The exergy destructions in these geothermal district heating systems are quantified and illustrated using exergy flow diagrams for a reference temperature of 1C using the 2003 and 2004 actual seasonal heating data. The results indicate that the exergy destructions in these systems particularly occur due to losses in pump, heat exchangers, pipelines, and the reinjection of thermal water. Exergy efficiencies of the two systems are investigated for the system performance analysis and improvement and are determined to be 42.89% and 59.58%, respectively.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer

2007-01-01T23:59:59.000Z

398

Geothermal: Sponsored by OSTI -- DEVELOPING THE NATIONAL GEOTHERMAL...  

Office of Scientific and Technical Information (OSTI)

DEVELOPING THE NATIONAL GEOTHERMAL DATA SYSTEM ADOPTION OF CKAN FOR DOMESTIC & INTERNATIONAL DATA DEPLOYMENT...

399

Assessment of the Geothermal System Near Stanley, Idaho  

SciTech Connect

The City of Stanley, Idaho (population 63) is situated in the Salmon River valley of the central Idaho highlands. Due to its location and elevation (6270 feet amsl) it is one of the coldest locales in the continental U.S., on average experiencing frost 290 days of the year as well as 60 days of below zero (oF) temperatures. Because of high snowfall (76 inches on average) and the fact that it is at the terminus of its rural grid, the city also frequently endures extended power outages during the winter. To evaluate its options for reducing heating costs and possible local power generation, the city obtained a rural development grant from the USDA and commissioned a feasibility study through author Roy Mink to determine whether a comprehensive site characterization and/or test drilling program was warranted. Geoscience students and faculty at Idaho State University (ISU), together with scientists from the Idaho Geological Survey (IGS) and Idaho National Laboratory (INL) conducted three field data collection campaigns between June, 2011 and November, 2012 with the assistance of author Beckwith who arranged for food, lodging and local property access throughout the field campaigns. Some of the information collected by ISU and the IGS were compiled by author Mink and Boise State University in a series of progress reports (Makovsky et al., 2011a, b, c, d). This communication summarizes all of the data collected by ISU including data that were compiled as part of the IGSs effort for the National Geothermal Data Systems (NGDS) data compilation project funded by the Department of Energy and coordinated by the Arizona Geological Survey.

Trent Armstrong; John Welhan; Mike McCurry

2012-06-01T23:59:59.000Z

400

Geothermal Blog | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Blog Blog Geothermal Blog RSS October 23, 2013 This diagram shows how electricity is produced using enhanced geothermal systems. | Energy Department Geothermal Energy: A Glance Back and a Leap Forward This year marks the centennial of the first commercial electricity production from geothermal resources. As geothermal technologies advance, the Energy Department is working to improve, and lower the cost of, enhanced geothermal systems. April 12, 2013 Learn the basics of enhanced geothermal systems technology. I Infographic by Sarah Gerrity. Enhanced Geothermal in Nevada: Extracting Heat From the Earth to Generate Sustainable Power Innovative clean energy project is up and running in Nevada.

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Geologic Setting of the Chena Hot Springs Geothermal System,...  

Open Energy Info (EERE)

Ma granites within Paleozoicmetamorphic rocks. CHS is located within the CHSpluton, a composite body of quartz diorite, tonalite,granodiorite, and granite of both mid-Cretaceous...

402

Use of Tracers to Characterize Fractures in Engineered Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

Project Objectives: Measure interwell fracture surface area and fracture spacing using sorbing tracers; measure fracture surface areas adjacent to a single geothermal well using tracers and injection/backflow techniques; design, fabricate and test a downhole instrument for measuring fracture flow following a hydraulic stimulation experiment.

403

Sonoma State Hospital, Eldridge, California, geothermal-heating system: conceptual design and economic feasibility report  

SciTech Connect

The Sonoma State Mental Hospital, located in Eldridge, California, is presently equipped with a central gas-fired steam system that meets the space heating, domestic hot water, and other heating needs of the hospital. This system is a major consumer of natural gas - estimated at 259,994,000 cubic feet per year under average conditions. At the 1981 unit gas rate of $0.4608 per therm, an average of $1,258,000 per year is required to operate the steam heating system. The hospital is located in an area with considerable geothermal resources as evidenced by a number of nearby hot springs resorts. A private developer is currently investigating the feasibility of utilizing geothermally heated steam to generate electricity for sale to the Pacific Gas and Electric Company. The developer has proposed to sell the byproduct condensed steam to the hospital, which would use the heat energy remaining in the condensate for its own heating needs and thereby reduce the fossil fuel energy demand of the existing steam heating system. The geothermal heating system developed is capable of displacing an estimated 70 percent of the existing natural gas consumption of the steam heating system. Construction of the geothermal fluid distribution and collection system and the retrofits required within the buildings are estimated to cost $1,777,000. Annual expenses (operation and maintenance, insurance, and geothermal fluid purchase) have been estimated to be $40,380 per year in 1981 dollars. The proposed geothermal heating system could then be completely paid for in 32 months by the savings in natural gas purchases that would result.

Not Available

1982-02-01T23:59:59.000Z

404

Coefficient of performance (COP) analysis of geothermal district heating systems (GDHSs): Salihli GDHS case study  

Science Journals Connector (OSTI)

The purpose of this survey is about to analyze the heating coefficient of performance (COP) of geothermal district heating systems. Actual system data are taken from the Salihli GDHS, Turkey. The collected data are quantified and illustrated in tables, particularly for a reference temperature for comparison purposes. In this study, firstly energy and COP analysis of the \\{GDHSs\\} is introduced and then Salihli GDHS coefficient of performance results is given as a case study. Moreover, this paper offers an interesting empirical study of certain geothermal systems.

Leyla Ozgener

2012-01-01T23:59:59.000Z

405

Direct utilization of geothermal heat in cascade application to aquaculture and greenhouse systems at Navarro College. Annual report, January 1984-September 1984  

SciTech Connect

Progress is reported on a project to use the 130/sup 0/F geothermal resource in central Texas. The system for cascading geothermal energy through aquaculture and greenhouse systems was completed and the first shrimp harvest was held. (MHR)

Smith, K.

1984-09-01T23:59:59.000Z

406

Geothermal Energy: A Glance Back and a Leap Forward | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Geothermal Energy: A Glance Back and a Leap Forward Geothermal Energy: A Glance Back and a Leap Forward Geothermal Energy: A Glance Back and a Leap Forward October 23, 2013 - 1:31pm Addthis This diagram shows how electricity is produced using enhanced geothermal systems. | Energy Department This diagram shows how electricity is produced using enhanced geothermal systems. | Energy Department Lauren Boyd Lauren Boyd Program Manager, Enhanced Geothermal Systems (EGS) HOW EGS WORKS Imagine taking an elevator down 900 stories-over two and a half miles into the Earth, where temperatures are upwards of 350°F-hot enough to bake a cake. Deep below our feet, hot rocks in the Earth's crust compress and twist over thousands of years, causing fractures to form. Now imagine pumping cold water down that hole. In the same way an

407

Geothermal Energy: A Glance Back and a Leap Forward | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Geothermal Energy: A Glance Back and a Leap Forward Geothermal Energy: A Glance Back and a Leap Forward Geothermal Energy: A Glance Back and a Leap Forward October 23, 2013 - 1:31pm Addthis This diagram shows how electricity is produced using enhanced geothermal systems. | Energy Department This diagram shows how electricity is produced using enhanced geothermal systems. | Energy Department Lauren Boyd Lauren Boyd Program Manager, Enhanced Geothermal Systems (EGS) HOW EGS WORKS Imagine taking an elevator down 900 stories-over two and a half miles into the Earth, where temperatures are upwards of 350°F-hot enough to bake a cake. Deep below our feet, hot rocks in the Earth's crust compress and twist over thousands of years, causing fractures to form. Now imagine pumping cold water down that hole. In the same way an

408

Parametric Investigation of the Performance of Solar Heating Systems with Rock Bed Storage  

Science Journals Connector (OSTI)

The performance of solar air collector domestic heating systems with rock bed storage, as obtained from theoretical analysis, is...

W. L. Dutre; J. Vanheelen

1981-01-01T23:59:59.000Z

409

Fault Mapping At Coso Geothermal Area (1980) | Open Energy Information  

Open Energy Info (EERE)

Fault Mapping At Coso Geothermal Area (1980) Fault Mapping At Coso Geothermal Area (1980) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Fault Mapping At Coso Geothermal Area (1980) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Fault Mapping Activity Date 1980 Usefulness useful DOE-funding Unknown Exploration Basis To determine the Late Cenozoic volcanism, geochronology, and structure of the Coso Range Notes This system apparently is heated by a reservoir of silicic magma at greater than or equal to 8-km depth, itself produced and sustained through partial melting of crustal rocks by thermal energy contained in mantle-derived basaltic magma that intrudes the crust in repsonse to lithospheric extension. References Duffield, W.A.; Bacon, C.R.; Dalrymple, G.B. (10 May 1980) Late

410

[Geothermal system temperature-depth database and model for data analysis]. 5. quarterly technical progress report  

SciTech Connect

During this first quarter of the second year of the contract activity has involved several different tasks. The author has continued to work on three tasks most intensively during this quarter: the task of implementing the data base for geothermal system temperature-depth, the maintenance of the WWW site with the heat flow and gradient data base, and finally the development of a modeling capability for analysis of the geothermal system exploration data. The author has completed the task of developing a data base template for geothermal system temperature-depth data that can be used in conjunction with the regional data base that he had already developed and is now implementing it. Progress is described.

Blackwell, D.D.

1998-04-25T23:59:59.000Z

411

Property:CapRockLithology | Open Energy Information  

Open Energy Info (EERE)

CapRockLithology CapRockLithology Jump to: navigation, search Property Name CapRockLithology Property Type String Description Condensed description of the lithology of the cap rock. Subproperties This property has the following 6 subproperties: B Beowawe Hot Springs Geothermal Area Brady Hot Springs Geothermal Area D Desert Peak Geothermal Area E East Mesa Geothermal Area H Heber Geothermal Area S Salton Sea Geothermal Area Pages using the property "CapRockLithology" Showing 6 pages using this property. A Amedee Geothermal Area + volcanic; lacustrine sediments + B Blue Mountain Geothermal Area + Hydrothermal alteration layer + G Geysers Geothermal Area + Hydrothermal alteration layer + K Kilauea East Rift Geothermal Area + Overlapping a'a' and pahoehoe flows + L Long Valley Caldera Geothermal Area + Metasedimentary Landslide Block; Hydrothermal Alteration Layer +

412

Modern Geothermal Features | Open Energy Information  

Open Energy Info (EERE)

Modern Geothermal Features Modern Geothermal Features Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Modern Geothermal Features Dictionary.png Modern Geothermal Features: Active geothermal manifestations such as hot springs, fumaroles, steaming ground, mud pots, mud pools, mud volcanoes, or geysers. Other definitions:Wikipedia Reegle When geothermal systems have conduits available to the surface, they cause surface manifestations (or geothermal features). These features may vary between steam seeps (fumaroles) or pure fluid manifestations (geysers and hot springs) causing spectacular mineral formations (e.g. sinter terraces, tufa mounds). These types of manifestations are clear indications of an underlying geothermal system. Geothermal systems with no modern surface

413

STANFORD GEOTHERMAL QUARTERLY REPORT  

E-Print Network (OSTI)

1 STANFORD GEOTHERMAL PROGRAM QUARTERLY REPORT JANUARY 1 - MARCH 31, 1997 #12;2 1 AN EXPERIMENTAL in geothermal systems as well as in many other applications such as porous heat pipes, drying and nuclear waste

Stanford University

414

Applications of Geothermal Energy  

Science Journals Connector (OSTI)

The distinction between near surface and deep geothermal systems follows from the different depth levels of the geothermal reservoirs and different techniques of utilization (Fig ... smooth. Distinguishing the tw...

Ingrid Stober; Kurt Bucher

2013-01-01T23:59:59.000Z

415

Life-cycle analysis results for geothermal systems in comparison to other power systems: Part II.  

SciTech Connect

A study has been conducted on the material demand and life-cycle energy and emissions performance of power-generating technologies in addition to those reported in Part I of this series. The additional technologies included concentrated solar power, integrated gasification combined cycle, and a fossil/renewable (termed hybrid) geothermal technology, more specifically, co-produced gas and electric power plants from geo-pressured gas and electric (GPGE) sites. For the latter, two cases were considered: gas and electricity export and electricity-only export. Also modeled were cement, steel and diesel fuel requirements for drilling geothermal wells as a function of well depth. The impact of the construction activities in the building of plants was also estimated. The results of this study are consistent with previously reported trends found in Part I of this series. Among all the technologies considered, fossil combustion-based power plants have the lowest material demand for their construction and composition. On the other hand, conventional fossil-based power technologies have the highest greenhouse gas (GHG) emissions, followed by the hybrid and then two of the renewable power systems, namely hydrothermal flash power and biomass-based combustion power. GHG emissions from U.S. geothermal flash plants were also discussed, estimates provided, and data needs identified. Of the GPGE scenarios modeled, the all-electric scenario had the highest GHG emissions. Similar trends were found for other combustion emissions.

Sullivan, J.L.; Clark, C.E.; Yuan, L.; Han, J.; Wang, M. (Energy Systems)

2012-02-08T23:59:59.000Z

416

MASSIVELY PARALLEL FULLY COUPLED IMPLICIT MODELING OF COUPLED THERMAL-HYDROLOGICAL-MECHANICAL PROCESSES FOR ENHANCED GEOTHERMAL SYSTEM RESERVOIRS  

SciTech Connect

Development of enhanced geothermal systems (EGS) will require creation of a reservoir of sufficient volume to enable commercial-scale heat transfer from the reservoir rocks to the working fluid. A key assumption associated with reservoir creation/stimulation is that sufficient rock volumes can be hydraulically fractured via both tensile and shear failure, and more importantly by reactivation of naturally existing fractures (by shearing) to create the reservoir. The advancement of EGS greatly depends on our understanding of the dynamics of the intimately coupled rock-fracture-fluid system and our ability to reliably predict how reservoirs behave under stimulation and production. In order to increase our understanding of how reservoirs behave under these conditions, we have developed a physics-based rock deformation and fracture propagation simulator by coupling a discrete element model (DEM) for fracturing with a continuum multiphase flow and heat transport model. In DEM simulations, solid rock is represented by a network of discrete elements (often referred as particles) connected by various types of mechanical bonds such as springs, elastic beams or bonds that have more complex properties (such as stress-dependent elastic constants). Fracturing is represented explicitly as broken bonds (microcracks), which form and coalesce into macroscopic fractures when external load is applied. DEM models have been applied to a very wide range of fracturing processes from the molecular scale (where thermal fluctuations play an important role) to scales on the order of 1 km or greater. In this approach, the continuum flow and heat transport equations are solved on an underlying fixed finite element grid with evolving porosity and permeability for each grid cell that depends on the local structure of the discrete element network (such as DEM particle density). The fluid pressure gradient exerts forces on individual elements of the DEM network, which therefore deforms and fractures. Such deformation/fracturing in turn changes the permeability, which again changes the evolution of fluid pressure, coupling the two phenomena. The intimate coupling between fracturing and fluid flow makes the meso-scale DEM simulations necessary, as these methods have substantial advantages over conventional continuum mechanical models of elastic rock deformation. The challenges that must be overcome to simulate EGS reservoir stimulation, preliminary results, progress to date and near future research directions and opportunities will be discussed.

Robert Podgorney; Hai Huang; Derek Gaston

2010-02-01T23:59:59.000Z

417

Wine Valley Inn: A mineral water spa in Calistoga, California. Geothermal-energy-system conceptual design and economic feasibility  

SciTech Connect

The purpose of this study is to determine the engineering and economic feasibility for utilizing geothermal energy for air conditioning and service water heating at the Wine Valley Inn, a mineral water spa in Calistoga, California. The study evaluates heating, ventilating, air conditioning and water heating systems suitable for direct heat geothermal application. Due to the excellent geothermal temperatures available at this site, the mechanics and economics of a geothermally powered chilled water cooling system are evaluated. The Wine Valley Inn has the resource potential to have one of the few totally geothermal powered air conditioning and water heating systems in the world. This total concept is completely developed. A water plan was prepared to determine the quantity of water required for fresh water well development based on the special requirements of the project. An economic evaluation of the system is included to justify the added capital investment needed to build the geothermally powered mineral spa. Energy payback calculations are presented. A thermal cascade system is proposed to direct the geothermal water through the energy system to first power the chiller, then the space heating system, domestic hot water, the two spas and finally to heat the swimming pool. The Energy Management strategy required to automatically control this cascade process using industrial quality micro-processor equipment is described. Energy Management controls are selected to keep equipment sizing at a minimum, pump only the amount of geothermal water needed and be self balancing.

Not Available

1981-10-26T23:59:59.000Z

418

Petroleum systems including unconventional reservoirs in intrusive igneous rocks (sills and laccoliths)  

Science Journals Connector (OSTI)

...formation. Suggested reading Geothermic of petroleum systems: Implications...Economic geology, geology of energy sources Applied geophysics...Schuelke James prefacer Devon Energy United States Soldo Juan prefacer Petrobras Brazil Devon Energy United States Petrobras Brazil...

Daniel H. Delpino; Adriana M. Bermdez

419

Evaluation of Oil-Industry Stimulation Practices for Engineered Geothermal Systems  

SciTech Connect

Geothermal energy extraction is typically achieved by use of long open-hole intervals in an attempt to connect the well with the greatest possible rock mass. This presents a problem for the development of Enhanced (Engineered) Geothermal Systems (EGS), owing to the challenge of obtaining uniform stimulation throughout the open-hole interval. Fluids are often injected in only a fraction of that interval, reducing heat transfer efficiency and increasing energy cost. Pinnacle Technologies, Inc. and GeothermEx, Inc. evaluated a variety of techniques and methods that are commonly used for hydraulic fracturing of oil and gas wells to increase and evaluate stimulation effectiveness in EGS wells. Headed by Leen Weijers, formerly Manager of Technical Development at Pinnacle Technologies, Inc., the project ran from August 1, 2004 to July 31, 2006 in two one-year periods to address the following tasks and milestones: 1) Analyze stimulation results from the closest oil-field equivalents for EGS applications in the United States (e.g., the Barnett Shale in North Texas) (section 3 on page 8). Pinnacle Technologies, Inc. has collected fracture growth data from thousands of stimulations (section 3.1 on page 12). This data was further evaluated in the context of: a) Identifying techniques best suited to developing a stimulated EGS fracture network (section 3.2 on page 29), and b) quantifying the growth of the network under various conditions to develop a calibrated model for fracture network growth (section 3.3 on page 30). The developed model can be used to design optimized EGS fracture networks that maximize contact with the heat source and minimize short-circuiting (section 3.4 on page 38). 2) Evaluate methods used in oil field applications to improve fluid diversion and penetration and determine their applicability to EGS (section 4 on page 50). These methods include, but are not limited to: a) Stimulation strategies (propped fracturing versus water fracturing versus injecting fluid below fracturing gradients) (section 4.1 on page 50); b) zonal isolation methods (by use of perforated casing or packers) (section 4.2 on page 57); c) fracture re-orientation and fracture network growth techniques (e.g., by use of alternating high- and low-rate injections) (section 4.4 on page 74); and d) fluid diversion methods (by use of the SurgiFrac technique, the StimGun perforation technique, or stress shadowing). This project task is to be completed in the first project year, enabling the most promising techniques to be field tested and evaluated in the second project year. 3) Study the applicability of the methods listed above by utilizing several techniques (section 5 on page 75) including, but not limited to: a) Hydraulic Impedance Testing (HIT) to determine the location of open hydraulic fractures along a open-hole interval; b) pressure transient testing to determine reservoir permeability, pore pressure, and closure stress; and c) treatment well tilt mapping or microseismic mapping to evaluate fracture coverage. These techniques were reviewed for their potential application for EGS in the first project year (section 5.1 on page 75). This study also includes further analysis of any field testing that will be conducted in the Desert Peak area in Nevada for ORMAT Nevada, Inc. (section 5.2 on page 86), with the aim to close the loop to provide reliable calibrated fracture model results. Developed through its hydraulic fracture consulting business, techniques of Pinnacle Technologies, Inc. for stimulating and analyzing fracture growth have helped the oil and gas industry to improve hydraulic fracturing from both a technical and economic perspective. In addition to more than 30 years of experience in the development of geothermal energy for commercial power generation throughout the world, GeothermEx, Inc. brings to the project: 1) Detailed information about specific developed and potential EGS reservoirs, 2) experience with geothermal well design, completion, and testing practices, and 3) a direct connection to the Desert Peak EGS project.

Peter Van Dyke; Leen Weijers; Ann Robertson-Tait; Norm Warpinski; Mike Mayerhofer; Bill Minner; Craig Cipolla

2007-10-17T23:59:59.000Z

420

Hydrologic test system for fracture flow studies in crystalline rock  

SciTech Connect

A hydrologic test system has been designed to measure the intrinsic permeabilities of individual fractures in crystalline rock. This system is used to conduct constant pressure-declining flow rate and pressure pulse hydraulic tests. The system is composed of four distinct units: (1) the Packer System, (2) Injection system, (3) Collection System, and (4) Electronic Data Acquisition System. The apparatus is built in modules so it can be easily transported and re-assembled. It is also designed to operate over a wide range of pressures (0 to 300 psig) and flow rates (0.2 to 1.0 gal/min). This system has proved extremely effective and versatile in its use at the Climax Facility, Nevada Test Site.

Raber, E; Lord, D.; Burklund, P.

1982-05-05T23:59:59.000Z

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Seismic methods for resource exploration in enhanced geothermal systems  

SciTech Connect

A finite-difference modeling study of seismic wave propagation was conducted to determine how to best investigate subsurface faults and fracture zones in geothermal areas. The numerical model was created based on results from a previous seismic reflection experiment. A suite of fault models was investigated including blind faults and faults with surface expressions. The seismic data suggest that blind faults can be detected by a sudden attenuation of seismic wave amplitudes, as long the fault is located below the receiver array. Additionally, a conversion from P- to S-waves indicates the reflection and refraction of the P-waves while propagating across the fault. The drop in amplitudes and the excitation of S-waves can be used to estimate the location of the fault at depth. The accuracy of the numerical modeling depends on the availability of a priori in situ information (velocity and density) from borehole experiments in the geothermal area.

Gritto, Roland; Majer, Ernest L.

2002-06-12T23:59:59.000Z

422

Flow Test At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., 1983) | Open  

Open Energy Info (EERE)

Grigsby, Et Al., 1983) Grigsby, Et Al., 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Flow Test At Fenton Hill Hdr Geothermal Area (Grigsby, Et Al., 1983) Exploration Activity Details Location Fenton Hill Hdr Geothermal Area Exploration Technique Flow Test Activity Date Usefulness not indicated DOE-funding Unknown References C. O. Grigsby, J. W. Tester, P. E. Trujillo, D. A. Counce, J. Abbott, C. E. Holley, L. A. Blatz (1983) Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ Geochemical Behavior Retrieved from "http://en.openei.org/w/index.php?title=Flow_Test_At_Fenton_Hill_Hdr_Geothermal_Area_(Grigsby,_Et_Al.,_1983)&oldid=511312" Category: Exploration Activities What links here Related changes

423

NATIONAL GEOTHERMAL DATA SYSTEM: AN EXEMPLAR OF OPEN ACCESS TO DATA  

SciTech Connect

The formal launch of National Geothermal Data System (NGDS www.geothermaldata.org) in 2014 will provide open access to technical geothermal-relevant data from all of the Department of Energy- sponsored geothermal development and research projects and geologic data from all 50 states. By making data easily discoverable and accessible this system will open new exploration opportunities and shorten project development. The prototype data system currently includes multiple data nodes, and nationwide data online and available to the public, indexed through a single catalog under construction at http://search.geothermaldata.org. Data from state geological surveys and partners includes more than 5 million records online, including 1.48 million well headers (oil and gas, water, geothermal), 732,000 well logs, and 314,000 borehole temperatures and is growing rapidly. There are over 250 Web services and another 138 WMS (Web Map Services) registered in the system as of August, 2013. Additional data record is being added by companion projects run by Boise State University, Southern Methodist University, and the USGS. The National Renewable Energy Laboratory is managing the Geothermal Data Repository, an NGDS node that will be a clearinghouse for data from hundreds of DOE-funded geothermal projects. NGDS is built on the US Geoscience Information Network (USGIN) data integration framework, which is a joint undertaking of the USGS and the Association of American State Geologists (AASG). NGDS is fully compliant with the White House Executive Order of May 2013, requiring all federal agencies to make their data holdings publicly accessible online in open source, interoperable formats with common core and extensible metadata. The National Geothermal Data System is being designed, built, deployed, and populated primarily with grants from the US Department of Energy, Geothermal Technologies Office. To keep this operational system sustainable after the original implementation will require four core elements: continued serving of data and applications by providers; maintenance of system operations; a governance structure; and an effective business model. Each of these presents a number of challenges currently under consideration.

Blackman, Harold [Arizona Geological Survey; Blackman, Harold M. [Arizona Geological Survey; Blackman, Harold M. [Arizona Geological Survey; Blackman, Harold [Boise State University; Blackman, Harold [United States Department of Energy; Blackman, Harold

2013-10-01T23:59:59.000Z

424

GEOTHERM Data Set  

DOE Data Explorer (OSTI)

GEOTHERM is a comprehensive system of public databases and software used to store, locate, and evaluate information on the geology, geochemistry, and hydrology of geothermal systems. Three main databases address the general characteristics of geothermal wells and fields, and the chemical properties of geothermal fluids; the last database is currently the most active. System tasks are divided into four areas: (1) data acquisition and entry, involving data entry via word processors and magnetic tape; (2) quality assurance, including the criteria and standards handbook and front-end data-screening programs; (3) operation, involving database backups and information extraction; and (4) user assistance, preparation of such items as application programs, and a quarterly newsletter. The principal task of GEOTHERM is to provide information and research support for the conduct of national geothermal-resource assessments. The principal users of GEOTHERM are those involved with the Geothermal Research Program of the U.S. Geological Survey.

DeAngelo, Jacob

425

Selected data for low-temperature (less than 90{sup 0}C) geothermal systems in the United States: reference data for US Geological Survey Circular 892  

SciTech Connect

Supporting data are presented for the 1982 low-temperature geothermal resource assessment of the United States. Data are presented for 2072 geothermal sites which are representative of 1168 low-temperature geothermal systems identified in 26 States. The low-temperature geothermal systems consist of 978 isolated hydrothermal-convection systems, 148 delineated-area hydrothermal-convection systems, and 42 delineated-area conduction-dominated systems. The basic data and estimates of reservoir conditions are presented for each geothermal system, and energy estimates are given for the accessible resource base, resource, and beneficial heat for each isolated system.

Reed, M.J.; Mariner, R.H.; Brook, C.A.; Sorey, M.L.

1983-12-15T23:59:59.000Z

426

Geothermal Technologies Office 2012 Peer Review Report | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Report 2010 Geothermal Technology Program Peer Review Report Tracer Methods for Characterizing Fracture Creation in Enhanced Geothermal Systems; 2010 Geothermal Technology Program...

427

Exergy analysis of a rock bed thermal storage system  

Science Journals Connector (OSTI)

In this paper, a thermodynamic procedure is presented to analyse energy and exergy balances of a rock bed thermal storage system. The thermal behaviour is described by means of a control volume that includes three subsystems: the solar collectors, the fluid distribution system and the storage chamber. Solar-to-thermal energy conversion was obtained by means of a solar collector at a fixed airflow rate. The final purpose of the method is to determine how well the thermodynamic modelling fits the real data obtained experimentally from the prototype under normal operating conditions.

J.J. Navarrete-Gonzalez; J.G. Cervantes-de Gortari; E. Torres-Reyes

2008-01-01T23:59:59.000Z

428

We present two systems, reliable sockets (rocks) and reliable packets (racks), that provide transparent network connection  

E-Print Network (OSTI)

Abstract We present two systems, reliable sockets (rocks) and reliable packets (racks of the connection changes IP address, with correct recovery of in-flight data. To allow rocks and racks Protocol that enables the remote detection of rocks and racks, or any other socket enhancement system

Miller, Barton P.

429

Raft River Geothermal Area | Open Energy Information  

Open Energy Info (EERE)

Raft River Geothermal Area Raft River Geothermal Area Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermal Resource Area: Raft River Geothermal Area Contents 1 Area Overview 2 History and Infrastructure 3 DOE Involvement 4 Timeline 5 Regulatory and Environmental Issues 6 Future Plans 7 Raft River Unit II (26 MW) and Raft River Unit III (32 MW) 8 Enhanced Geothermal System Demonstration 9 Exploration History 10 Well Field Description 11 Technical Problems and Solutions 12 Geology of the Area 12.1 Regional Setting 12.2 Structure 12.3 Stratigraphy 12.3.1 Raft River Formation 12.3.2 Salt Lake Formation 12.3.3 Precambrian Rocks 13 Hydrothermal System 14 Heat Source 15 Geofluid Geochemistry 16 NEPA-Related Analyses (1) 17 Exploration Activities (77) 18 References Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"TERRAIN","zoom":6,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"300px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.10166667,"lon":-113.38,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

430

OpenEI:Old Geothermal Gateway | Open Energy Information  

Open Energy Info (EERE)

Gateway Gateway Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Geothermalpower.jpg GeoInfo.png Geothermal Information Geothermal Energy Overview Types of Geothermal Resources Energy Conversion Technologies Cooling Technologies Exploration Techniques Reference Materials GeoModels.png Geothermal Models & Tools GETEM SAM Geothermal Prospector Exploration Cost and Time Metric Georesource.png Resource Assessments USGS Maps (2008) Geothermal Resource Potential Map Geothermal Areas Geothermal Regions Installed.png Installed & Planned Capacity Geothermal Generation Installed Capacity Planned Capacity Geofinancing.png Geothermal Financing Developers' Financing Handbook RE Project Finance CREST HOMER REFTI GeoR&D.png Geothermal RD&D Enhanced Geothermal Systems

431

Life-Cycle Analysis Results of Geothermal Systems in Comparison to Other Power Systems  

Energy.gov (U.S. Department of Energy (DOE))

A life-cycle energy and greenhouse gas emissions analysis has been conducted with Argonne National Laboratory's GREET model for geothermal power-generating technologies, including enhanced geothermal, hydrothermal flash, and hydrothermal binary technologies.

432

Stanford Geothermal Workshop - Geothermal Technologies Office...  

Energy Savers (EERE)

- Geothermal Technologies Office Stanford Geothermal Workshop - Geothermal Technologies Office Presentation by Geothermal Technologies Director Doug Hollett at the Stanford...

433

Energy Department Announces $10 Million to Speed Enhanced Geothermal Systems into the Market  

Office of Energy Efficiency and Renewable Energy (EERE)

In support President Obamas all-of-the-above energy strategy, the Energy Department today announced $10 million to improve subsurface characterization for enhanced geothermal systems (EGS) by developing state-of-the-art methods that quantify critical underground reservoir properties as they change over time.

434

Demonstration of a Variable Phase Turbine Power System for Low Temperature Geothermal Resources  

SciTech Connect

A variable phase turbine assembly will be designed and manufactured having a turbine, operable with transcritical, two-phase or vapor flow, and a generator on the same shaft supported by process lubricated bearings. The assembly will be hermetically sealed and the generator cooled by the refrigerant. A compact plate-fin heat exchanger or tube and shell heat exchanger will be used to transfer heat from the geothermal fluid to the refrigerant. The demonstration turbine will be operated separately with two-phase flow and with vapor flow to demonstrate performance and applicability to the entire range of low temperature geothermal resources. The vapor leaving the turbine is condensed in a plate-fin refrigerant condenser. The heat exchanger, variable phase turbine assembly and condenser are all mounted on single skids to enable factory assembly and checkout and minimize installation costs. The system will be demonstrated using low temperature (237F) well flow from an existing large geothermal field. The net power generated, 1 megawatt, will be fed into the existing power system at the demonstration site. The system will demonstrate reliable generation of inexpensive power from low temperature resources. The system will be designed for mass manufacturing and factory assembly and should cost less than $1,200/kWe installed, when manufactured in large quantities. The estimated cost of power for 300F resources is predicted to be less than 5 cents/kWh. This should enable a substantial increase in power generated from low temperature geothermal resources.

Hays, Lance G

2014-07-07T23:59:59.000Z

435

Using estimated risk to develop stimulation strategies for Enhanced Geothermal Systems John Douglas* and Hideo Aochi  

E-Print Network (OSTI)

-defined acceptable risk thresholds the injection is: increased (if the risk is below the amber level), decreased (if could lead to both acceptable levels of risk and increased permeability. hal-00921141,version1-19Dec20131 Using estimated risk to develop stimulation strategies for Enhanced Geothermal Systems John

Paris-Sud XI, Université de

436

Geothermal fluxes of alkalinity in the Narayani river system of central Nepal  

E-Print Network (OSTI)

Geothermal fluxes of alkalinity in the Narayani river system of central Nepal Matthew J. Evans hot springs flow within the steeply incised gorges of the central Nepal Himalayan front. The spring of central Nepal, Geochem. Geophys. Geosyst., 5, Q08011, doi:10.1029/2004GC000719. G 3 G 3Geochemistry

Derry, Louis A.

437

A Case Study of Wide Diameter Casing for Geothermal Systems  

SciTech Connect

Three wells have been drilled in the central resistivity area of a geothermal field in the Taupo Volcanic Zone, New Zealand. Using a well bore simulator, WELL SIM V3.0, reservoir conditions and well characteristics are evaluated to determine the increase in output by increasing production casing diameters from either 8-5/8 inches OD or 9-5/8 inches OD to 13-3/8 inches OD. Increases in well drilling costs are determined to provide a commentary on the economics. While open hole size is effectively doubled, well costs increase by 10% and, in this study, output increases by an average of 18%.

King, T.R.; Freeston, D.H.; Winmill, R.L.

1995-01-01T23:59:59.000Z

438

Geothermal Literature Review At General Us Region (Goff & Decker, 1983) |  

Open Energy Info (EERE)

Geothermal Literature Review At General Us Region (Goff & Decker, 1983) Geothermal Literature Review At General Us Region (Goff & Decker, 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At General Us Region (Goff & Decker, 1983) Exploration Activity Details Location General Us Region Exploration Technique Geothermal Literature Review Activity Date Usefulness useful DOE-funding Unknown Notes Review and identification of 24 potential sites for EGS development across the U.S., as well as modeling of the representative geologic systems in which promising EGS sites occur. References Fraser Goff, Edward R. Decker (1983) Candidate Sites For Future Hot Dry Rock Development In The United States Retrieved from "http://en.openei.org/w/index.php?title=Geothermal_Literature_Review_At_General_Us_Region_(Goff_%26_Decker,_1983)&oldid=510806"

439

Precise and accurate determination of boron isotope ratios by multiple collector ICP-MS: origin of boron in the Ngawha geothermal system, New Zealand  

Science Journals Connector (OSTI)

A new technique has been developed for the measurement of boron isotope ratios in fluids using a double focusing multiple collector inductively coupled plasma (ICP) mass spectrometer. Sample introduction using a direct injection nebuliser was found to eliminate memory problems that are common where spray chambers are involved. The 49% mass bias can be corrected for by bracketing sample measurements with standards. As matrices were found to affect the mass bias all samples must be purified and that sample and standard solutions must be similar. A new purification technique was developed that yields adequately purified samples. Using this technique, it is possible to make rapid measurements (4 min) from samples containing 250 ng B to a precision of 0.2. This analytical technique has been applied to the Ngawha geothermal system in New Zealand in an attempt to determine the source of B in geothermal fluids where the B concentrations can exceed 100 mmol/l. The ?11B values range between ?3.1 and ?3.9 indicating that no seawater sources are involved and that the elevated B concentrations can only be accounted for by low water/rock ratios with the B being derived from basement greywacke/argillite. The similarity of B isotope ratios for hydrothermal fluids that have been diluted and cooled with groundwaters indicates that isotope fractionation due to adsorption is unlikely to occur in cool geothermal fluids (<40 C).

J.K. Aggarwal; D. Sheppard; K. Mezger; E. Pernicka

2003-01-01T23:59:59.000Z

440

Design and optimization of a downhole coaxial heat exchanger for an enhanced geothermal system (EGS)  

Science Journals Connector (OSTI)

The present study considers the design, performance analysis and optimization of a downhole coaxial heat exchanger for an enhanced geothermal system (EGS). The optimum mass flow rate of the geothermal fluid for minimum pumping power and maximum extracted heat energy was determined. In addition, the coaxial pipes of the downhole heat exchanger were sized based on the optimum geothermal mass flow rate and steady-state operation. Transient effect or time-dependent cooling of the Earth underground, and the optimum amount and size of perforations at the inner pipe entrance region to regulate the flow of the geothermal fluid were disregarded to simplify the analysis. The paper consists of an analytical and numerical thermodynamic optimization of a downhole coaxial heat exchanger used to extract the maximum possible energy from the Earth's deep underground (2km and deeper below the surface) for direct usage, and subject to a nearly linear increase in geothermal gradient with depth. The thermodynamic optimization process and entropy generation minimization (EGM) analysis were performed to minimize heat transfer and fluid friction irreversibilities. An optimum diameter ratio of the coaxial pipes for minimum pressure drop in both limits of the fully turbulent and laminar fully-developed flow regime was determined and observed to be nearly the same irrespective of the flow regime. Furthermore, an optimum geothermal mass flow rate and an optimum geometry of the downhole coaxial heat exchanger were determined for maximum net power output. Conducting an energetic and exergetic analysis to evaluate the performance of binary power cycle, higher Earth's temperature gradient and lower geofluid rejection temperatures were observed to yield maximum first- and second-law efficiencies.

P.J. Yekoladio; T. Bello-Ochende; J.P. Meyer

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

STATUS OF GEOTHERMAL RESERVOIR ENGINEERING MANAGEMENT PROGRAM ("GREMP") -DECEMBER, 1979  

E-Print Network (OSTI)

ment methods for geothermal well system param- eters,on calcite-fouled geothermal wells (Michaels, 1979). An

Howard, J. H.

2012-01-01T23:59:59.000Z

442

Barriers and enablers to geothermal district heating system development in the United States  

Science Journals Connector (OSTI)

According to the US Energy Information Administration, space and hot water heating represented about 20% of total US energy demand in 2006. Given that most of this demand is met by burning natural gas, propane, and fuel oil, an enormous opportunity exists for directly utilizing indigenous geothermal energy as a cleaner, nearly emissions-free renewable alternative. Although the US is rich in geothermal energy resources, they have been frequently undervalued in America's portfolio of options as a means of offsetting fossil fuel emissions while providing a local, reliable energy source for communities. Currently, there are only 21 operating GDHS in the US with a capacity of about 100MW thermal. Interviews with current US district heating operators were used to collect data on and analyze the development of these systems. This article presents the current structure of the US regulatory and market environment for GDHS along with a comparative study of district heating in Iceland where geothermal energy is extensively utilized. It goes on to review the barriers and enablers to utilizing geothermal district heating systems (GDHS) in the US for space and hot water heating and provides policy recommendations on how to advance this energy sector in the US.

Hildigunnur H. Thorsteinsson; Jefferson W. Tester

2010-01-01T23:59:59.000Z

443

Quantitative analysis of existing conditions and production strategies for the Baca geothermal system, New Mexico  

SciTech Connect

The Baca geothermal reservoir and adjacent aquifers in the Jemez Mountains of New Mexico comprise an integrated hydrogeologic system. Analysis of the geothermal reservoir either under natural conditions or subject to proposed development should account for the mass (water) and energy (heat) balances of adjacent aquifers as well as the reservoir itself. A three-dimensional model based on finite difference approximation is applied to this integrated system. The model simulates heat transport associated with the flow of steam and water through an equivalent porous medium. The Baca geothermal reservoir is dominated by flow in fractures and distinct strata, but at the scale of application the equivalent porous media concept is appropriate. The geothermal reservoir and adjacent aquifers are simulated under both natural conditions and proposed production strategies. Simulation of natural conditions compares favorably with observed pressure, temperature, and thermal discharge data. The history matching simulations show that the results used for comparison are most sensitive to vertical permeability and the area of an assumed high-permeability zone connecting the reservoir to a deep hydrothermal source. Simulations using proposed production strategies and optimistic estimates of certain hydrologic parameters and reservoir extent indicate that a 50-MW power plant could be maintained for a period greater than 30 years. This production, however, will result in significant decreases in the total water discharge to the Jemez River.

Faust, C.R.; Mercer, J.W.; Thomas, S.D.; Balleau, W.A.

1984-05-01T23:59:59.000Z

444

Energy and exergy analysis of geothermal district heating systems: an application  

Science Journals Connector (OSTI)

In this study we present an energy and exergy assessment and modeling of geothermal district heating systems for their system analysis, performance evaluation and optimization. A comprehensive case study is conducted in Balcova geothermal district heating system (BGDHS) in Izmir, Turkey and actual thermal data are collected and employed for analysis. Using actual system data, an assessment of the district heating system performance, energy and exergy efficiencies, and exergy destructions in the system is conducted in this regard. The exergy destructions in the overall BGDHS are quantified and illustrated using exergy flow diagram. Furthermore, both energy and exergy flow diagrams are exhibited for comparison purposes. It is observed through analysis that the exergy destructions in the system particularly take place as the exergy of the fluid lost in the pumps, the heat exchanger losses, the exergy of the thermal water (geothermal fluid) reinjected and the natural direct discharge (hot water distribution losses) of the system, accounting for 1.64%, 8.57%, 14.84% and 28.96%, respectively, of the total exergy input to the BGDHS. For system performance analysis and improvement, both energy and exergy efficiencies of the overall BGDHS are investigated and are determined to be 41.9% and 46%, respectively.

Leyla Ozgener; Arif Hepbasli; Ibrahim Dincer

2005-01-01T23:59:59.000Z

445

Geothermal Literature Review At Medicine Lake Geothermal Area (1984) | Open  

Open Energy Info (EERE)

Geothermal Area (1984) Geothermal Area (1984) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At Medicine Lake Geothermal Area (1984) Exploration Activity Details Location Medicine Lake Geothermal Area Exploration Technique Geothermal Literature Review Activity Date 1984 Usefulness not indicated DOE-funding Unknown Notes The melt zones of volcanic clusters was analyzed with recent geological and geophysical data for five magma-hydrothermal systems were studied for the purpose of developing estimates for the depth, volume and location of magma beneath each area. References Goldstein, N. E.; Flexser, S. (1 December 1984) Melt zones beneath five volcanic complexes in California: an assessment of shallow magma occurrences

446

Geothermal Literature Review At Salton Trough Geothermal Area (1984) | Open  

Open Energy Info (EERE)

Trough Geothermal Area (1984) Trough Geothermal Area (1984) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At Salton Trough Geothermal Area (1984) Exploration Activity Details Location Salton Trough Geothermal Area Exploration Technique Geothermal Literature Review Activity Date 1984 Usefulness not indicated DOE-funding Unknown Notes The melt zones of volcanic clusters was analyzed with recent geological and geophysical data for five magma-hydrothermal systems were studied for the purpose of developing estimates for the depth, volume and location of magma beneath each area. References Goldstein, N. E.; Flexser, S. (1 December 1984) Melt zones beneath five volcanic complexes in California: an assessment of shallow magma occurrences

447

Iceland Geothermal Conference 2013 - Geothermal Policies and...  

Energy Savers (EERE)

Iceland Geothermal Conference 2013 - Geothermal Policies and Impacts in the U.S. Iceland Geothermal Conference 2013 - Geothermal Policies and Impacts in the U.S. Iceland Geothermal...

448

Fracture Characterization in Enhanced Geothermal Systems by Wellbore and Reservoir Analysis  

SciTech Connect

This report highlights the work that was done to characterize fractured geothermal reservoirs using production data. That includes methods that were developed to infer characteristic functions from production data and models that were designed to optimize reinjection scheduling into geothermal reservoirs, based on these characteristic functions. The characterization method provides a robust way of interpreting tracer and flow rate data from fractured reservoirs. The flow-rate data are used to infer the interwell connectivity, which describes how injected fluids are divided between producers in the reservoir. The tracer data are used to find the tracer kernel for each injector-producer connection. The tracer kernel describes the volume and dispersive properties of the interwell flow path. A combination of parametric and nonparametric regression methods were developed to estimate the tracer kernels for situations where data is collected at variable flow-rate or variable injected concentration conditions. The characteristic functions can be used to calibrate thermal transport models, which can in turn be used to predict the productivity of geothermal systems. This predictive model can be used to optimize injection scheduling in a geothermal reservoir, as is illustrated in this report.

Roland N. Horne, Kewen Li, Mohammed Alaskar, Morgan Ames, Carla Co, Egill Juliusson, Lilja Magnusdottir

2012-06-30T23:59:59.000Z

449

Development of an Enhanced Two-Phase Production System at the Geysers Geothermal Field  

SciTech Connect

A method was developed to enhance geothermal steam production from two-phase wells at THE Geysers Geothermal Field. The beneficial result was increased geothermal production that was easily and economically delivered to the power plant.

Steven Enedy

2001-12-14T23:59:59.000Z

450

Modeling of thermodynamic and chemical changes in low-temperature geothermal systems  

SciTech Connect

A method was developed to incorporate the transport of several chemical components into a model of the transport of fluid mass and heat within a geothermal system. It was demonstrated that the use of coupled hydrological, thermal and chemical data allows for the determination of field porosities, amounts and regions of cool recharge into the system as well as field permeabilities and the hot reservoir volume. With the additional information a reliable prediction of the long-term cooling rate can be made.

Spencer, A.L.

1986-12-01T23:59:59.000Z

451

Geotechnical studies of geothermal reservoirs | Open Energy Information  

Open Energy Info (EERE)

Geotechnical studies of geothermal reservoirs Geotechnical studies of geothermal reservoirs Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Geotechnical studies of geothermal reservoirs Details Activities (7) Areas (7) Regions (0) Abstract: It is proposed to delineate the important factors in the geothermal environment that will affect drilling. The geologic environment of the particular areas of interest are described, including rock types, geologic structure, and other important parameters that help describe the reservoir and overlying cap rock. The geologic environment and reservoir characteristics of several geothermal areas were studied, and drill bits were obtained from most of the areas. The geothermal areas studied are: (1) Geysers, California, (2) Imperial Valley, California, (3) Roosevelt Hot

452

Performance investigation of the Afyon geothermal district heating system for building applications: Exergy analysis  

Science Journals Connector (OSTI)

This paper deals with an energy and exergy evaluation and modeling of geothermal district heating systems for their system analysis, performance evaluation and optimization. As a comprehensive case study, the Afyon geothermal district heating system (AFJET) in Afyon, Turkey is considered and actual thermal data are collected and employed for analysis. Using actual system data, an evaluation of the district heating system performance, energy and exergy efficiencies, and exergy destructions in the system are conducted in this regard. This study is also conducted to show how energy and exergy efficiencies of the \\{GDHSs\\} will change with the reference temperature and how exergy losses will affect by the temperature difference between the geothermal resource and the supply temperature of the district heating distribution network. In addition, the negative effects of discharge waters of the AFJET are presented. The energy and exergy efficiencies of the entire AFJET are found to be 37.59% and 47.54%, respectively. The results are expected to be helpful to researchers and engineers in the area.

Ali Keeba?; Muhammet Kayfeci; Engin Gedik

2011-01-01T23:59:59.000Z

453

Novel use of 4D Monitoring Techniques to Improve Reservoir Longevity and Productivity in Enhanced Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

Novel use of 4D Monitoring Techniques to Improve Reservoir Longevity and Productivity in Enhanced Geothermal Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

454

The Viability of Sustainable, Self-Propping Shear Zones in Ehanced Geothermal Systems: Measurement of Reaction Rates at Elevated Temperatures  

Energy.gov (U.S. Department of Energy (DOE))

The Viability of Sustainable, Self-Propping Shear Zones in Ehanced Geothermal Systems: Measurement of Reaction Rates at Elevated Temperatures presentation at the April 2013 peer review meeting held in Denver, Colorado.

455

Joint inversion of electrical and seismic data for Fracture char. and Imaging of Fluid Flow in Geothermal Systems  

Energy.gov (U.S. Department of Energy (DOE))

Joint inversion of electrical and seismic data for Fracture char. and Imaging of Fluid Flow in Geothermal Systems presentation at the April 2013 peer review meeting held in Denver, Colorado.

456

Heat exchanger optimization for geothermal district heating systems: A fuel saving approach  

Science Journals Connector (OSTI)

One of the most commonly used heating devices in geothermal systems is the heat exchanger. The output conditions of heat exchangers are based on several parameters. The heat transfer area is one of the most important parameters for heat exchangers in terms of economics. Although there are a lot of methods to optimize heat exchangers, the method described here is a fairly easy approach. In this paper, a counter flow heat exchanger of geothermal district heating system is considered and optimum design values, which provide maximum annual net profit, for the considered heating system are found according to fuel savings. Performance of the heat exchanger is also calculated. In the analysis, since some values are affected by local conditions, Turkey's conditions are considered.

Ahmet Dagdas

2007-01-01T23:59:59.000Z

457

Application of the 3-D Hydro-Mechanical Model GEOFRAC in enhanced geothermal systems  

E-Print Network (OSTI)

GEOFRAC is a three-dimensional, geology-based, geometric-mechanical, hierarchical, stochastic model of natural rock fracture systems. The main characteristic of GEOFRAC is that it is based on statistical input representing ...

Vecchiarelli, Alessandra

2013-01-01T23:59:59.000Z

458

Exploration for Hot Dry Rock geothermal resources in the Midcontinent USA. Volume 1. Introduction, geologic overview, and data acquisition and evaluation  

SciTech Connect

The Midcontinent of North America is commonly characterized as a stable cratonic area which has undergone only slow, broad vertical movements over the past several hundreds of millions of years. This tectonically stable crust is an unfertile area for hot dry rock (HDR) exploration. However, recent geophysical and geological studies provide evidence for modest contemporary tectonic activity in limited areas within the continent and, therefore, the possibility of localized thermal anomalies which may serve as sites for HDR exploration. HDR, as an energy resource in the Midcontinent, is particularly appealing because of the high population density and the demand upon conventional energy sources. Five generalized models of exploration targets for possible Midcontinent HDR sites are identified: (1) radiogenic heat sources, (2) conductivity-enhanced normal geothermal gradients, (3) residual magnetic heat, (4) sub-upper crustal sources, and (5) hydrothermal generated thermal gradients. Three potential sources of HDR, each covering approximately a 2/sup 0/ x 2/sup 0/ area, were identified and subjected to preliminary evaluation. In the Mississippi Embayment test site, lateral thermal conductivity variations and subcrustal heat sources may be involved in producing abnormally high subsurface temperatures. Studies indicate that enhanced temperatures are associated primarily with basement rift features where vertical displacement of aquifers and faults cause the upward migration of hot waters leading to anomalously high local upper crustal temperatures. The Western Nebraska test site is a potential low temperature HDR source also related, at least in part, to groundwater movement. The Southeast Michigan test site was selected for study because of the possible presence of radiogenic plutons overlain by a thickened sedimentary blanket.

Hinze, W.J.; Braile, L.W.; von Frese, R.R.B.; Lidiak, E.G.; Denison, R.E.; Keller, G.R.; Roy, R.F.; Swanberg, C.A.; Aiken, C.L.V.; Morgan, P.

1986-02-01T23:59:59.000Z

459

Application of seismic tomographic techniques in the investigation of geothermal systems  

SciTech Connect

The utility of microearthquake data for characterizing the Northwest Geysers geothermal field and the Long Valley Caldera (LVC) was investigated. Three-dimensional (3-D) P- and S-wave seismic velocity models were estimated for the Coldwater Creek Steam Field (CCSF) in the Northwest Geysers region. Hypocenters relocated using these 3-D models appear to be associated with the steam producing zone, with a deeper cluster of hypocenters beneath an active injection well. Spatial and temporal patterns of seismicity exhibit strong correlation with geothermal exploitation. A 3-D differential attenuation model was also developed for the CCSF from spectral ratios corrected for strong site effects. High-velocity anomalies and low attenuation in the near surface correspond to Franciscan metagraywacke and greenstone units. Microearthquakes recorded at seismographic stations located near the metagraywacke unit exhibit high corner frequencies. Low-velocity anomalies and higher attenuation in the near surface are associated with sections of Franciscan melange. Near-surface high attenuation and high Vp/Vs are interpreted to indicate liquid-saturated regions affected by meteoric recharge. High attenuation and low Vp/Vs marks the steam producing zone, suggesting undersaturation of the reservoir rocks. The extent of the high attenuation and low Vp/Vs anomalies suggest that the CCSF steam reservoir may extend northwestward beyond the known producing zone. This study concludes that microearthquake monitoring may be useful as an active reservoir management tool. Seismic velocity and attenuation structures as well as the distribution of microearthquake activity can be used to identify and delineate the geothermal reservoir, while temporal variations in these quantities would be useful in tracking changes during exploitation.

Romero, A.E. Jr.

1995-05-01T23:59:59.000Z

460

BSU GHP District Heating and Cooling System (PHASE I) Geothermal Project |  

Open Energy Info (EERE)

BSU GHP District Heating and Cooling System (PHASE I) Geothermal Project BSU GHP District Heating and Cooling System (PHASE I) Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title BSU GHP District Heating and Cooling System (PHASE I) Project Type / Topic 1 Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Project Type / Topic 2 Topic Area 1: Technology Demonstration Projects Project Description The Project will result in the construction of the largest ground source geothermal-based closed loop GHP heating and cooling system in America. Phase I of the Project began with the design, competitive bidding, and contract award for the drilling and "looping" of 1,800 boreholes in sports fields and parking lots on the north side of campus. The components of the entire Project include: (1) 4,100 four hundred feet deep boreholes spread over about 25 acres of sport fields and parking lots (Phase I will involve 1,800 boreholes spread over about 8 acres); (2) Each Phase will require a district energy station (about 9,000 sq. feet) that will each contain (A) two 2,500 ton heat pump chillers (which can produce 150 degree (F) water for heating purposes and 42 degree (F) water for cooling purposes); and (B) a variety of water pumps, electrical and other control systems; (3) a closed loop piping system that continuously circulates about 20,000 gallons of water (no anti-freeze) per minute through the boreholes, energy stations, a (two pipe) hot water loop and a (two pipe) chilled water loop (no water is drawn from the aquifer at any point in the operation); and (4) hot/chilled water-to-air heat exchangers in each of the buildings.

Note: This page contains sample records for the topic "rock geothermal systems" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Artificial neural network modeling of geothermal district heating system thought exergy analysis  

Science Journals Connector (OSTI)

This paper deals with an artificial neural network (ANN) modeling to predict the exergy efficiency of geothermal district heating system under a broad range of operating conditions. As a case study, the Afyonkarahisar geothermal district heating system (AGDHS) in Turkey is considered. The average daily actual thermal data acquired from the AGDHS in the 20092010 heating season are collected and employed for exergy analysis. An ANN modeling is developed based on backpropagation learning algorithm for predicting the exergy efficiency of the system according to parameters of the system, namely the ambient temperature, flow rate and well head temperature. Then, the recorded and calculated data conducted in the AGDHS at different dates are used for training the network. The results showed that the network yields a maximum correlation coefficient with minimum coefficient of variance and root mean square values. The results confirmed that the ANN modeling can be applied successfully and can provide high accuracy and reliability for predicting the exergy performance of geothermal district heating systems.

Ali Keeba?; ?smail Yabanova; Mehmet Yumurtac?

2012-01-01T23:59:59.000Z

462

Exergoeconomic analysis of the Gonen geothermal district heating system for buildings  

Science Journals Connector (OSTI)

This paper presents an application of an exergoeconomic model, through exergy and cost accounting analyses, to the Gonen geothermal district heating system (GDHS) in Balikesir, Turkey for the entire system and its components. This exergoeconomic model is used to reveal the cost formation process and the productive interaction between components. The exergy destructions in the overall Gonen GDHS are quantified and illustrated for a reference temperature of 4C. The results indicate that the exergy destructions in the system occur primarily as a result of losses in the cooled geothermal water injected back into the reservoir, pumps, heat exchangers, and pipelines. Total exergy destruction and reinjection exergy of the cooled geothermal water result in 1010kW (accounting for 32.49%), 320.3kW (accounting for 10%) of the total exergy input to the Gonen GDHS, respectively. Both energy and exergy efficiencies of the overall Gonen GDHS are also investigated to analyze the system performance, as these efficiencies are determined to be 42% and 50%, respectively. It is found that an increase of the load condition leads to a decrease in the overall thermal costs, which will result in more cost-effective energy systems for buildings.

Z. Oktay; I. Dincer

2009-01-01T23:59:59.000Z

463

ANNOTATED RESEARCH BIBLIOGRAPHY FOR GEOTHERMAL RESERVOIR ENGINEERING  

E-Print Network (OSTI)

Modeling f o r Geothermal Reservoirs and Power- plants. I'Fumaroles Hunt, 1970 Geothermal power James, 1978 FusionGood a lated perfo : Geothermal Power Systems Compared. 'I

Sudo!, G.A

2012-01-01T23:59:59.000Z

464

Geothermal: Sponsored by OSTI -- Fracture Characterization in...  

Office of Scientific and Technical Information (OSTI)

Fracture Characterization in Enhanced Geothermal Systems by Wellbore and Reservoir Analysis Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log...

465

Geothermal: Sponsored by OSTI -- Electronic Submersible Pump...  

Office of Scientific and Technical Information (OSTI)

Electronic Submersible Pump (ESP) Technology and Limitations with Respect to Geothermal Systems (Fact Sheet) Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact...

466

Conceptual Model At Coso Geothermal Area (2005) | Open Energy Information  

Open Energy Info (EERE)

Coso Geothermal Area (2005) Coso Geothermal Area (2005) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Conceptual Model Activity Date 2005 Usefulness not indicated DOE-funding Unknown Exploration Basis Develop a conceptual model of the Coso area Notes Investigation of the Coso Range using seismicity, gravity, and geochemistry of rocks and fluids, supports the interpretation that the structure hosting the geothermal resource is a nascent metamorphic core complex. The structural setting is a releasing bend in a dextral strike-slip system that extends from the Indian Wells Valley northward into the Owens Valley. This tectonic setting results in NW-directed transtension, which is accommodated by normal and strike-slip faulting of the brittle upper 4-6 km of the

467

Systems study of drilling for installation of geothermal heat pumps  

SciTech Connect

Geothermal, or ground-source, heat pumps (GHP) are much more efficient than air-source units such as conventional air conditioners. A major obstacle to their use is the relatively high initial cost of installing the heat-exchange loops into the ground. In an effort to identify drivers which influence installation cost, a number of site visits were made during 1996 to assess the state-of-the-art in drilling for GHP loop installation. As an aid to quantifying the effect of various drilling-process improvements, we constructed a spread-sheet based on estimated time and material costs for all the activities required in a typical loop-field installation. By substituting different (improved) values into specific activity costs, the effect on total project costs can be easily seen. This report contains brief descriptions of the site visits, key points learned during the visits, copies of the spread-sheet, recommendations for further work, and sample results from sensitivity analysis using the spread-sheet.

Finger, J.T.; Sullivan, W.N.; Jacobson, R.D.; Pierce, K.G.

1997-09-01T23:59:59.000Z

468

Thermal monitoring and optimization of geothermal district heating systems using artificial neural network: A case study  

Science Journals Connector (OSTI)

This paper deals with determine the energy and exergy efficiencies and exergy destructions for thermal optimization of a geothermal district heating system by using artificial neural network (ANN) technique. As a comprehensive case study, the Afyonkarahisar geothermal district heating system (AGDHS) in Afyonkarahisar/Turkey is considered and its actual thermal data as of average weekly data are collected in heating seasons during the period 20062010 for ANN based monitoring and thermal optimization. The measured data and calculated values are used at the design of Levenberg-Marquardt (LM) based multi-layer perceptron (MLP) in Matlab program. The results of the study are described graphically. The results show that the developed model is found to quickly predict the thermal performance and exergy destructions of the AGDHS with good accuracy. In addition, two main factors play important roles in the thermal optimization: (i) ambient temperature and (ii) flow rates in energy distribution cycle of the AGDHS. Various cases are investigated to determine how to change the energy and exergy efficiencies of the AGDHS for the temperature and flow rate. Finally, a monitoring and performance evaluation of a geothermal district heating system and its components by ANN will reduce the losses and human involvement and make the system more effective and efficient.

Ali Keeba?; ?smail Yabanova

2012-01-01T23:59:59.000Z

469

Underground Mine Water Heating and Cooling Using Geothermal Heat Pump Systems  

SciTech Connect

In many regions of the world, flooded mines are a potentially cost-effective option for heating and cooling using geothermal heat pump systems. For example, a single coal seam in Pennsylvania, West Virginia, and Ohio contains 5.1 x 1012 L of water. The growing volume of water discharging from this one coal seam totals 380,000 L/min, which could theoretically heat and cool 20,000 homes. Using the water stored in the mines would conservatively extend this option to an order of magnitude more sites. Based on current energy prices, geothermal heat pump systems using mine water could reduce annual costs for heating by 67% and cooling by 50% over conventional methods (natural gas or heating oil and standard air conditioning).

Watzlaf, G.R.; Ackman, T.E.

2006-03-01T23:59:59.000Z

470

Experience with the EM-60 electromagnetic system for geothermal exploration in Nevada  

SciTech Connect

Lawrence Berkeley Laboratory (LBL) conducted controlled-source electromagnetic (EM) surveys at three geothermal prospects in northern Nevada. Over 40 soundings were made in Panther Canyon (Grass Valley), near Winnemucca; Soda Lakes, near Fallon; and McCoy, west of Austin, to test and demonstrate the applicability of LBL's EM-60 system to geothermal exploration. The EM-60 is a frequency-domain system using three-component magnetic detection. Typically, +-65 A is applied to an 100-m-diameter four-turn horizontal loop, generating a dipole moment >10/sup 6/ MKS over the frequency range 10/sup -3/ to 10/sup -3/ Hz. With such a source loop, soundings were made, at transmitter-receiver separations of up to 4 km, providing a maximum depth of penetration of 4 km.

Wilt, M.; Goldstein, N.E.; Stark, M.; Haught, J.R.; Morrison, H.F.

1981-09-01T23:59:59.000Z

471

Creation of an Engineered Geothermal System through Hydraulic and Thermal Stimulation  

Energy.gov (U.S. Department of Energy (DOE))

Project objectives: To create an Enhanced Geothermal System on the margin of the Cosofield through the hydraulic, thermal, and/or chemical stimulation of one or more tight injection wells; To increase the productivity of the Cosofield by 10 MWe; To develop and calibrate geomechanical, geochemical, and fluid flow models in order to extend the Coso/EGS concepts to wherever appropriate tectonic and thermal conditions apply.

472

FIVE-YEAR PROGRESS REPORT ON A SUCCESSFUL SOLAR/GEOTHERMAL HEATING AND COOLING SYSTEM FOR A COMMERCIAL OFFICE BUILDING IN BURLINGTON, MASSACHUSETTS  

Science Journals Connector (OSTI)

ABSTRACT The purpose of this paper is to present: 1) a description of a solar/geothermal heating and cooling system that has been in successful operation in a commercial office building for over five years; and 2) to present technical and cost operational results that indicate a total annual energy consumption of approximately 25,000 Btu/sq ft/ year. The paper includes a general description of the three-story multi-tenant office building located in Burlington, Massachusetts, its energy efficient design features, its active solar space heating and hot water system, its solar/geothermal heat pump back-up heating system and its geothermal cooling system. A description of the solar/geothermal system is presented including the liquid flat plate collectors, storage tanks, heat exchangers, heat pump, heat transfer fluid, control system, operational modes and the energy monitoring system. KEYWORDS Solar space heating; geothermal heating; geothermal cooling; solar domestic hot water; energy monitoring and control.

John Zvara; P.E.; Ronald J. Adams

1986-01-01T23:59:59.000Z

473

Geothermal development in Australia  

SciTech Connect

In Australia, natural hot springs and hot artesian bores have been developed for recreational and therapeutic purposes. A district heating system at Portland, in the Otway Basin of western Victoria, has provided uninterrupted service for 12 Sears without significant problems, is servicing a building area of 18 990 m{sup 2}, and has prospects of expansion to manufacturing uses. A geothermal well has provided hot water for paper manufacture at Traralgon, in the Gippsland Basin of eastern Victoria. Power production from hot water aquifers was tested at Mulka in South Australia, and is undergoing a four-year production trial at Birdsville in Queensland. An important Hot Dry Rock resource has been confirmed in the Cooper Basin. It has been proposed to build an HDR experimental facility to test power production from deep conductive resources in the Sydney Basin near Muswellbrook.

Burns, K.L. [Los Alamos National Lab., NM (United States); Creelman, R.A. [Creelman (R.A.) and Associates, Sydney, NSW (Australia); Buckingham, N.W. [Glenelg Shire Council, Portland, VIC (Australia); Harrington, H.J. [Australian National Univ., Canberra, ACT (Australia)]|[Sydney Univ., NSW (Australia)

1995-03-01T23:59:59.000Z

474

Economic assessment of geothermal district heating systems: A case study of BalcovaNarlidere, Turkey  

Science Journals Connector (OSTI)

Geothermal energy is an important renewable energy resource in Turkey. The aim of this research is to evaluate the BalcovaNarlidere geothermal district heating system from an economic perspective. The system is the largest one in Turkey in terms of heating capacity and located in Izmir. Although there are some assessments regarding energy and exergy analysis for the BalcovaNarlidere geothermal district heating system, an economic assessment was not performed, previously. The profitability of the investment is investigated by using internal rate of return method. Seven hundred and eighty different scenarios are developed in this assessment. In order to estimate the potential cash flows in the remaining project life, operating cost in 2002 is decreased and increased, alternatively, between 5% and 30% by 5% in each step, while monthly energy utilization price is changed between US$ 17 and 72 in those scenarios. The energy utilization prices are suggested according to zero IRR value for all scenarios due to the consideration of social and environmental concerns in this investment. It is found that, the proper monthly energy utilization price for a 100m2 household would be US$ 55.5 when the operating cost and heating capacity in 2002 were remained constant.

Berkan Erdogmus; Macit Toksoy; Baris Ozerdem; Niyazi Aksoy

2006-01-01T23:59:59.000Z

475

Geothermal regimes of the Clearlake region, northern California  

SciTech Connect

The first commercial production of power from geothermal energy, at The Geysers steamfield in northern California in June 1960, was a triumph for the geothermal exploration industry. Before and since, there has been a search for further sources of commercial geothermal power in The Geysers--Clear Lake geothermal area surrounding The Geysers. As with all exploration programs, these were driven by models. The models in this case were of geothermal regimes, that is, the geometric distribution of temperature and permeability at depth, and estimates of the physical conditions in subsurface fluids. Studies in microseismicity and heat flow, did yield geophysical information relevant to active geothermal systems. Studies in stable-element geochemistry found hiatuses or divides at the Stoney Creek Fault and at the Collayomi Fault. In the region between the two faults, early speculation as to the presence of steamfields was disproved from the geochemical data, and the potential existence of hot-water systems was predicted. Studies in isotope geochemistry found the region was characterized by an isotope mixing trend. The combined geochemical data have negative implications for the existence of extensive hydrothermal systems and imply that fluids of deep origin are confined to small, localized systems adjacent to faults that act as conduits. There are also shallow hot-water aquifers. Outside fault-localized systems and hot-water aquifers, the area is an expanse of impermeable rock. The extraction of energy from the impermeable rock will require the development and application of new methods of reservoir creation and heat extraction such as hot dry rock technology.

Amador, M. [ed.; Burns, K.L.; Potter, R.M.

1998-06-01T23:59:59.000Z

476

Conceptual Model At Valles Caldera - Sulphur Springs Geothermal...  

Open Energy Info (EERE)

Exploration Basis This review integrates data from VC-1 and from select geothermal test wells of the Fenton Hill Hot Dry Rock and Baca Geothermal projects in order to construct a...

477

Multielement geochemistry of solid materials in geothermal systems and its applications. Part 1. Hot-water system at the Roosevelt Hot Springs KGRA, Utah  

SciTech Connect

Geochemical studies of the geothermal system at Roosevelt Hot Springs, Utah, have led to development of chemical criteria for recognition of major features of the system and to a three-dimensional model for chemical zoning in the system. Based on this improved level of understanding several new or modified geochemical exploration and assessment techniques have been defined and are probably broadly applicable to evaluation of hot-water geothermal systems. The main purpose of this work was the development or adaptation of solids geochemical exploration techniques for use in the geothermal environment. (MHR)

Bamford, R.W.; Christensen, O.D.; Capuano, R.M.

1980-02-01T23:59:59.000Z

478

Levelized costs of electricity and direct-use heat from Enhanced Geothermal Systems  

Science Journals Connector (OSTI)

GEOPHIRES (GEOthermal energy for the Production of Heat and Electricity (IR) Economically Simulated) is a software tool that combines reservoir wellbore and power plant models with capital and operating cost correlations and financial levelized cost models to assess the technical and economic performance of Enhanced Geothermal Systems (EGS). It is an upgrade and expansion of the MIT-EGS program used in the 2006 Future of Geothermal Energy study. GEOPHIRES includes updated cost correlations for well drilling and completion resource exploration and Organic Rankine Cycle (ORC) and flash power plants. It also has new power plant efficiency correlations based on AspenPlus and MATLAB simulations. The structure of GEOPHIRES enables feasibility studies of using geothermal resources not only for electricity generation but also for direct-use heating and combined heat and power (CHP) applications. Full documentation on GEOPHIRES is provided in the supplementary material. Using GEOPHIRES the levelized cost of electricity (LCOE) and the levelized cost of heat (LCOH) have been estimated for 3 cases of resource grade (low- medium- and high-grade resource corresponding to a geothermal gradient of 30 50 and 70?C/km) in combination with 3 levels of technological maturity (today's mid-term and commercially mature technology corresponding to a productivity of 30 50 and 70?kg/s per production well and thermal drawdown rate of 2% 1.5% and 1%). The results for the LCOE range from 4.6 to 57 /kWhe and for the LCOH from 3.5 to 14 $/MMBTU (1.2 to 4.8 /kWhth). The results for the base-case scenario (medium-grade resource and mid-term technology) are 11 /kWhe and 5 $/MMBTU (1.7 /kWhth) respectively. To account for parameter uncertainty a sensitivity analysis has been included. The results for the LCOE and LCOH have been compared with values found in literature for EGS as well as other energy technologies. The key findings suggest that given today's technology maturity electricity and direct-use heat from EGS are not economically competitive under current market conditions with other energy technologies. However with moderate technological improvements electricity from EGS is predicted to become cost-effective with respect to other renewable and non-renewable energy sources for medium- and high-grade geothermal resources. Direct-use heat from EGS is calculated to become cost-effective even for low-grade resources. This emphasizes that EGS for direct-use heat may not be neglected in future EGS development.

2014-01-01T23:59:59.000Z

479

Prediction of rocks thermal conductivity from elastic wave velocities, mineralogy and microstructure  

Science Journals Connector (OSTI)

......exploitation of geothermal energy rely on the proper...predict TC in a cost-effective way...geometry of the cost-function and...crustal rocks and geothermal applications...Clauser C. Geothermal energy. Landolt Bornstein......

Lucas Pimienta; Joel Sarout; Lionel Esteban; Claudio Delle Piane

2014-01-01T23:59:59.000Z

480

Geothermal Literature Review At Long Valley Caldera Geothermal Area (1984)  

Open Energy Info (EERE)

Geothermal Literature Review At Long Valley Caldera Geothermal Area (1984) Geothermal Literature Review At Long Valley Caldera Geothermal Area (1984) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At Long Valley Caldera Geothermal Area (1984) Exploration Activity Details Location Long Valley Caldera Geothermal Area Exploration Technique Geothermal Literature Review Activity Date 1984 Usefulness not indicated DOE-funding Unknown Notes The melt zones of volcanic clusters was analyzed with recent geological and geophysical data for five magma-hydrothermal systems were studied for the purpose of developing estimates for the depth, volume and location of magma beneath each area. References Goldstein, N. E.; Flexser, S. (1 December 1984) Melt zones beneath five volcanic complexes in California: an assessment of shallow

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