National Library of Energy BETA

Sample records for geothermal ground source

  1. Monitoring SERC Technologies —Geothermal/Ground Source Heat Pumps

    Broader source: Energy.gov [DOE]

    A webinar by National Renewable Energy Laboratory Project Leader Dave Peterson about Geothermal/Ground Source Heat Pumps and how to properly monitor its installation.

  2. Ball State Completes Largest U.S. Ground-Source Geothermal System...

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

    campus-wide ground-source geothermal system, the nation's largest geothermal heating and cooling system, DOE announced on March 20. DOE played a part in the project by providing a...

  3. Sustainable Energy Resources for Consumers (SERC)- Geothermal/Ground-Source Heat Pumps

    Broader source: Energy.gov [DOE]

    This presentation, aimed at Sustainable Energy Resources for Consumers (SERC) grantees, provides information on Monitoring Checklists for the installation of Geothermal/Ground-Source Heat Pumps.

  4. ORNL/TM-2008/232 Geothermal (Ground-Source) Heat Pumps

    E-Print Network [OSTI]

    Pennycook, Steve

    ORNL/TM-2008/232 Geothermal (Ground-Source) Heat Pumps: Market Status, Barriers to Adoption January 1, 1996, may be purchased by members of the public from the following source. National Technical, and International Nuclear Information System (INIS) representatives from the following source. Office of Scientific

  5. Research and Development Roadmap. Geothermal (Ground-Source) Heat Pumps

    SciTech Connect (OSTI)

    Goetzler, William; Guernsey, Matt; Kar, Rahul

    2012-10-01

    Roadmap identifying potential activities and technical innovations that may enable substantial improvements in residential and commercial Geothermal Heat Pumps (GHP) installed cost and/or efficiency.

  6. Geothermal(Ground-Source)Heat Pumps: Market Status, Barriers to Adoption, and Actions to Overcome Barriers

    SciTech Connect (OSTI)

    Hughes, Patrick

    2008-12-01

    More effective stewardship of our resources contributes to the security, environmental sustainability, and economic well-being of the nation. Buildings present one of the best opportunities to economically reduce energy consumption and limit greenhouse gas emissions. Geothermal heat pumps (GHPs), sometimes called ground-source heat pumps, have been proven capable of producing large reductions in energy use and peak demand in buildings. However, GHPs have received little attention at the policy level as an important component of a national strategy. Have policymakers mistakenly overlooked GHPs, or are GHPs simply unable to make a major contribution to the national goals for various reasons? This brief study was undertaken at DOE's request to address this conundrum. The scope of the study includes determining the status of global GHP markets and the status of the GHP industry and technology in the United States, assembling previous estimates of GHP energy savings potential, identifying key barriers to application of GHPs, and identifying actions that could accelerate market adoption of GHPs. The findings are documented in this report along with conclusions and recommendations.

  7. Geothermal (Ground-Source) Heat Pumps: Market Status, Barriers to Adoption, and Actions to Overcome Barriers

    SciTech Connect (OSTI)

    Hughes, Patrick [ORNL

    2009-01-01

    More effective stewardship of our resources contributes to the security, environmental sustainability, and economic well-being of the nation. Buildings present one of the best opportunities to economically reduce energy consumption and limit greenhouse gas emissions. Geothermal heat pump systems (GHPs), sometimes called ground-source heat pump or Geo-Exchange systems, have been proven capable of producing large reductions in energy use and peak demand in buildings. However, GHPs have received little attention at the policy level as an important component of a national energy and climate strategy. Have policymakers mistakenly overlooked GHPs, or are GHPs simply unable to make a major contribution to the national goals for various reasons? This brief study was undertaken at DOE s request to address this conundrum. The scope of the study includes determining the status of global GHP markets and the status of the GHP industry and technology in the United States, assembling previous estimates of GHP energy savings potential and other benefits, identifying key barriers to application of GHPs, and identifying actions that could accelerate market adoption of GHPs. The findings are documented in a report along with conclusions and recommendations. This paper summarizes the key information from the report.

  8. Ball State University Completes Nation's Largest Ground-Source...

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

    campus-wide ground-source geothermal system, the nation's largest geothermal heating and cooling system. Building on significant investment from the State of Indiana and the...

  9. Ground Gravity Survey At Neal Hot Springs Geothermal Area (U...

    Open Energy Info (EERE)

    Ground Gravity Survey At Neal Hot Springs Geothermal Area (U.S. Geothermal Inc., 2007) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground...

  10. Recovery Act - Geothermal Technologies Program: Ground Source Heat Pumps Final Scientific/Technical Report

    SciTech Connect (OSTI)

    Nick Rosenberry, Harris Companies

    2012-05-04

    A large centralized geothermal heat pump system was installed to provide ice making, space cooling, space heating, process water heating, and domestic hot water heating for an ice arena in Eagan Minnesota. This paper provides information related to the design and construction of the project. Additionally, operating conditions for 12 months after start-up are provided.

  11. Ground Gravity Survey At Dixie Valley Geothermal Area (Allis...

    Open Energy Info (EERE)

    Ground Gravity Survey At Dixie Valley Geothermal Area (Allis, Et Al., 2000) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground Gravity Survey...

  12. Ground Gravity Survey At Roosevelt Hot Springs Geothermal Area...

    Open Energy Info (EERE)

    Ground Gravity Survey At Roosevelt Hot Springs Geothermal Area (Faulder, 1991) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground Gravity...

  13. Ground Gravity Survey At Neal Hot Springs Geothermal Area (Colwell...

    Open Energy Info (EERE)

    Ground Gravity Survey At Neal Hot Springs Geothermal Area (Colwell, Et Al., 2012) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground Gravity...

  14. Ground Gravity Survey At Kilauea East Rift Geothermal Area (FURUMOTO...

    Open Energy Info (EERE)

    Ground Gravity Survey At Kilauea East Rift Geothermal Area (FURUMOTO, 1976) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground Gravity Survey...

  15. Ground Gravity Survey At Kilauea East Rift Geothermal Area (Leslie...

    Open Energy Info (EERE)

    Ground Gravity Survey At Kilauea East Rift Geothermal Area (Leslie, Et Al., 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground Gravity...

  16. Ground Gravity Survey At Kilauea East Rift Geothermal Area (Broyles...

    Open Energy Info (EERE)

    Ground Gravity Survey At Kilauea East Rift Geothermal Area (Broyles, Et Al., 1979) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground Gravity...

  17. Ground Gravity Survey At Blue Mountain Geothermal Area (Fairbank...

    Open Energy Info (EERE)

    Ground Gravity Survey At Blue Mountain Geothermal Area (Fairbank Engineering Ltd, 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground...

  18. Overcoming Barriers to Ground Source Heat Pumps in California

    E-Print Network [OSTI]

    Overcoming Barriers to Ground Source Heat Pumps in California Geothermal Resources Development Account http://www.energy.ca.gov/geothermal/ grda.html May 2011 The Issue Ground source heat pumps can far made little impact in California. Estimates are that adoption of ground source heat pumps

  19. Ground Magnetics At Neal Hot Springs Geothermal Area (Colwell...

    Open Energy Info (EERE)

    Area (Colwell, Et Al., 2012) Exploration Activity Details Location Neal Hot Springs Geothermal Area Exploration Technique Ground Magnetics Activity Date 2011 - 2011...

  20. Sustainable Energy Resources for Consumers (SERC) -Geothermal...

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

    Sustainable Energy Resources for Consumers (SERC) - GeothermalGround-Source Heat Pumps Sustainable Energy Resources for Consumers (SERC) - GeothermalGround-Source Heat Pumps...

  1. MODELING OF VERTICAL GROUND LOOP HEAT EXCHANGERS FOR GROUND SOURCE

    E-Print Network [OSTI]

    exchanger model is crucial for analysis of hybrid ground source heat pump systems. Ground source heat pumps in a hybrid ground source heat pump application under different climate conditions. An actual office buildingMODELING OF VERTICAL GROUND LOOP HEAT EXCHANGERS FOR GROUND SOURCE HEAT PUMP SYSTEMS By CENK

  2. Potential effects of the Hawaii geothermal project on ground-water resources on the Island of Hawaii

    SciTech Connect (OSTI)

    Sorey, M.L.; Colvard, E.M.

    1994-07-01

    This report provides data and information on the quantity and quality of ground-water resources in and adjacent to proposed geothermal development areas on the Island of Hawaii Geothermal project for the development of as much as 500 MW of electric power from the geothermal system in the East Rift Zone of Kilauea Volcano. Data presented for about 31 wells and 8 springs describe the chemical, thermal, and hydraulic properties of the ground-water system in and adjacent to the East Rift Zone. On the basis of this information, potential effects of this geothermal development on drawdown of ground-water levels and contamination of ground-water resources are discussed. Significant differences in ground-water levels and in the salinity and temperature of ground water within the study area appear to be related to mixing of waters from different sources and varying degrees of ground-water impoundment by volcanic dikes. Near Pahoa and to the east, the ground-water system within the rift is highly transmissive and receives abundant recharge from precipitation; therefore, the relatively modest requirements for fresh water to support geothermal development in that part of the east rift zone would result in minimal effects on ground-water levels in and adjacent to the rift. To the southwest of Pahoa, dike impoundment reduces the transmissivity of the ground-water system to such an extent that wells might not be capable of supplying fresh water at rates sufficient to support geothermal operations. Water would have to be transported to such developments from supply systems located outside the rift or farther downrift. Contaminant migration resulting from well accidents could be rapid because of relatively high ground-water velocities in parts of the region. Hydrologic monitoring of observation wells needs to be continued throughout development of geothermal resources for the Hawaii Geothermal Project to enable the early detection of leakage and migration of geothermal fluids.

  3. MODELING, SIMULATION AND OPTIMIZATION OF GROUND SOURCE

    E-Print Network [OSTI]

    MODELING, SIMULATION AND OPTIMIZATION OF GROUND SOURCE HEAT PUMP SYSTEMS By MUHAMMAD HAIDER KHAN AND OPTIMIZATION OF GROUND SOURCE HEAT PUMP SYSTEMS Thesis Approved..................................................................................................................... 1 1.1 Overview of Ground Source Heat Pump Systems.............................................. 1 1

  4. Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems

    E-Print Network [OSTI]

    Hong, Tainzhen

    2010-01-01

    tool for geothermal water loop heat pump systems, 9thInternational IEA Heat Pump Conference, Zürich, Switzerland,of ground source heat pump system in a near-zero energy

  5. Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems

    E-Print Network [OSTI]

    Hong, Tainzhen

    2010-01-01

    tool for geothermal water loop heat pump systems, 9thInternational IEA Heat Pump Conference, Zürich, Switzerland,Performance of ground source heat pump system in a near-zero

  6. MODELING OF VERTICAL GROUND LOOP HEAT EXCHANGERS FOR GROUND SOURCE

    E-Print Network [OSTI]

    MODELING OF VERTICAL GROUND LOOP HEAT EXCHANGERS FOR GROUND SOURCE HEAT PUMP SYSTEMS By CENK SOURCE HEAT PUMP SYSTEMS Thesis Approved: ___________________________________________ Thesis Adviser pump systems. For detailed analysis and accurate simulation of the transient heat transfer in vertical

  7. Geothermal-Heat Extraction As a source of renewable energy, geothermal-heat extraction has become increasingly

    E-Print Network [OSTI]

    Kornhuber, Ralf

    Geothermal-Heat Extraction As a source of renewable energy, geothermal-heat extraction has become increasingly important in recent years. Proper design of a geothermal system, be it for deep or for shallow

  8. The citation for this paper is: Spitler, J.D., X. Liu, S.J. Rees, C. Yavuzturk. 2005. Simulation and Optimization of Ground Source Heat

    E-Print Network [OSTI]

    of the ground source heat pump (GSHP) system are presented - vertical ground loop heat exchanger, water source systems. Second, application of the simula- tion for design of vertical ground loop heat exchangers (GLHE will be discussed. Key words: ground source heat pump systems, geothermal, ground-coupled 1 INTRODUCTION Using

  9. Sustainable Energy Resources for Consumers (SERC) -Geothermal...

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

    information on Monitoring Checklists for the installation of GeothermalGround-Source Heat Pumps. geothermalgroundsourceheatpumps.pdf More Documents & Publications...

  10. North Village Ground Source Heat Pumps

    Broader source: Energy.gov [DOE]

    Overview: Installation of Ground Source Heat Pumps. Replacement of Aging Heat Pumps. Alignment with Furmans Sustainability Goals.

  11. Above Ground Geothermal and Allied Technologies Masters Scholarship in Energy & Materials: design of a rig

    E-Print Network [OSTI]

    Hickman, Mark

    Above Ground Geothermal and Allied Technologies Masters Scholarship in Energy & Materials: design into the largest green energy resources; industrial waste heat, biomass combustion and geothermal energy. Research of geothermal energy after completing the degree. Proficiency in English is essential. Contact: mark

  12. Promising Technology: Ground Source Heat Pumps

    Broader source: Energy.gov [DOE]

    Ground source heat pumps (GSHP) use the constant temperature of the Earth as the heat exchange medium instead of the outside air temperature. During the winter, a GSHP uses the ground as a heat source to provide heating, and during the summer, a GSHP uses the ground as a heat sink to provide cooling. Although more expensive than air-source heat pumps, GSHP’s are much more efficient, especially in cold temperatures.

  13. GEOTHERMAL HEAT PUMPS Jack DiEnna

    E-Print Network [OSTI]

    GEOTHERMAL HEAT PUMPS THE "PLAYBOOK" Jack DiEnna Executive Director The Geothermal National What do we call it... Geothermal, Ground Source, GeoExchange. The feds call it geothermal heat pumps IS GEOTHERMAL HEAT PUMP TECHNOLOGY ??? Answer: It is a 60 year old technology! #12;FACT GHP's were first written

  14. Information systems and technology transfer programs on geothermal energy and other renewable sources of energy

    E-Print Network [OSTI]

    Lippmann, M J

    1996-01-01

    Information systems and technology transfer programs on geothermal energy and other renewable sources of energy

  15. 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:...

  16. ADVANCES IN MODELING OF GROUND-SOURCE HEAT

    E-Print Network [OSTI]

    knowledge and experience in several geothermal topics. I also wish to thank to Dr. Simon Rees who served-Coupled Heat Pump Systems........................................................5 1.1.2.1. Vertical Ground

  17. IMPLEMENTING GROUND SOURCE HEAT PUMP AND GROUND LOOP HEAT EXCHANGER

    E-Print Network [OSTI]

    ............................................................................................. 22 2.3. Implementing the Geothermal Systems in Energy............................................................................................... 23 2.3.2. Multi-year Simulation................................................................. 30

  18. Ground Gravity Survey At Dixie Valley Geothermal Area (Blackwell...

    Open Energy Info (EERE)

    David D. Blackwell, Kenneth W. Wisian, Maria C. Richards, Mark Leidig, Richard Smith, Jason McKenna (2003) Geothermal Resource Analysis and Structure of Basin and Range...

  19. MODELING, VERIFICATION AND OPTIMIZATION OF HYBRID GROUND SOURCE HEAT PUMP

    E-Print Network [OSTI]

    MODELING, VERIFICATION AND OPTIMIZATION OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS IN ENERGYPLUS, VERIFICATION AND OPTIMIZATION OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS IN ENERGYPLUS Thesis Approved by: Dr.................................................................................................................... 16 MODELING OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS IN ENERGYPLUS

  20. Data Analysis from Ground Source Heat Pump Demonstration Projects...

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

    Analysis from Ground Source Heat Pump Demonstration Projects Data Analysis from Ground Source Heat Pump Demonstration Projects Comparison of building energy use before and after...

  1. Ground Magnetics At Neal Hot Springs Geothermal Area (U.S. Geothermal...

    Open Energy Info (EERE)

    Date 2007 - 2007 Usefulness not indicated DOE-funding Unknown Exploration Basis Gravity and Magnetic surveys were done as part of U.S. Geothermal's geophysical program for...

  2. Introduction Ground source heat pump (GSHP) systems are used

    E-Print Network [OSTI]

    to drilling of bore- holes for vertical ground heat exchangers (GHX), or excavation for horizontal GHX, USA, spitler@okstate.edu signhilD e.a. gehlin Technical Expert, Swedish Centre for Shallow Geothermal pumps, GSHP, foundation heat exchanger, FHX,vertical ground heat exchanger, VGHX REHVA Journal ­ January

  3. Geothermal, an alternate energy source for power generation

    SciTech Connect (OSTI)

    Espinosa, H.A.

    1985-02-01

    The economic development of nations depends on an escalating use of energy sources. With each passing year the dependence increases, reaching a point where the world will require, in the next six years, a volume of energetics equal to that consumed during the last hundred years. Statistics show that in 1982 about 70% of the world's energy requirements were supplied by oil, natural gas and coal. The remaining 30% came from other sources such as nuclear energy, hydroelectricity, and geothermal. In Mexico the situation is more extreme. For the same year (1982) 85% of the total energy consumed was supplied through the use of hydrocarbons, and only 15% through power generated by the other sources of electricity. Of the 15%, 65% used hydrocarbons somewhere in the power generation system. Geothermal is an energy source that can help solve the problem, particularly in Mexico, because the geological and structural characteristics of Mexico make it one of the countries in the world with a tremendous geothermal potential. The potential of geothermal energy for supplying part of Mexico's needs is discussed.

  4. The influence of geothermal sources on deep ocean temperature, salinity, and flow fields

    E-Print Network [OSTI]

    Speer, Kevin G. (Kevin George)

    1988-01-01

    This thesis is a study of the effect of geothermal sources on the deep circulation, temperature and salinity fields. In Chapter 1 background material is given on the strength and distribution of geothermal heating. In ...

  5. Geothermal-Heat Extraction As a source of renewable energy, geothermal-heat extraction has become increasingly

    E-Print Network [OSTI]

    Kornhuber, Ralf

    period before the injected cold water significantly affects the groundwater temperature at the extraction horizontal (steady) flow and (transient) heat-transport model for a warm-water extraction / cold-waterGeothermal-Heat Extraction As a source of renewable energy, geothermal-heat extraction has become

  6. SIMULATION AND OPTIMAL CONTROL OF HYBRID GROUND SOURCE HEAT

    E-Print Network [OSTI]

    SIMULATION AND OPTIMAL CONTROL OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS By XIAOWEI XU Bachelor #12;ii SIMULATION AND OPTIMAL CONTROL OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS Dissertation Approved of Vertical Ground Loop Heat Exchangers - Analytical....... 21 2.1.1.2 Modeling of Vertical Ground Loop Heat

  7. DESIGN OF AN EXPERIMENTAL FACILITY FOR HYBRID GROUND SOURCE HEAT

    E-Print Network [OSTI]

    DESIGN OF AN EXPERIMENTAL FACILITY FOR HYBRID GROUND SOURCE HEAT PUMP SYSTEMS By SHAWN ALEX HERN.1 HYBRID GROUND SOURCE HEAT PUMP SYSTEM DESIGN........................................2-3 2.1.1 Design...............................................................................2-5 2.2 HYBRID GROUND SOURCE HEAT PUMP SYSTEM SIMULATION................................2-9 3

  8. APPLICATIONS OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS TO

    E-Print Network [OSTI]

    APPLICATIONS OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS TO BUILDINGS AND BRIDGE DECKS. By MAHADEVAN Chapter Page 1. Introduction 1.1. Overview of hybrid ground source heat pump systems 1.2. Literature review 1.3. Thesis objective and scope 2. Optimal sizing of hybrid ground source heat pump system

  9. A Coordinated Exploration Program for Geothermal Sources on the...

    Open Energy Info (EERE)

    of Geophysics; p. 993-1001 Related Geothermal Exploration Activities Activities (8) Direct-Current Resistivity Survey At Kilauea East Rift Geothermal Area (FURUMOTO, 1976)...

  10. Pinpointing America's Geothermal Resources with Open Source Data...

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

    Addthis Related Articles The National Geothermal Data System is helping researchers and industry developers cultivate geothermal technology applications in energy and direct-use...

  11. CNCC Craig Campus Geothermal Program: 82-well closed loop GHP...

    Open Energy Info (EERE)

    Milestones Geothermal energy provided by a ground source heat pump system will reduce consumption of electricity (60% is from coal) and natural gas resources compared to...

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

    Open Energy Info (EERE)

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

  13. District Wide Geothermal Heating Conversion Blaine County School...

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

    will impact the geothermal energy development market by showing that ground source heat pump systems using production and re-injection wells has the lowest total cost of...

  14. Application analysis of ground source heat pumps in building space conditioning

    E-Print Network [OSTI]

    Qian, Hua

    2014-01-01

    methods for ground-source heat pumps. in ASHRAE Summergas emission savings of ground source heat pump systems inheat exchangers for ground-source heat pumps: A literature

  15. Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems

    E-Print Network [OSTI]

    Hong, Tainzhen

    2010-01-01

    Performance of ground source heat pump system in a near-zerosimulation tool for ground- source heat pump system designflow systems and ground source heat pump systems Abstract

  16. Geothermal Energy Utilization via Effective Design of Ground-Coupled

    E-Print Network [OSTI]

    Tennessee, University of

    efficient, environmentally clean, and cost- effective space conditioning systems available (source: "Space) ­ Europe ranked higher on per capita basis (now absorbing 2 to 3 times the number of GHP units annually those in the United States. · Key Obstacles ­ Upfront installation cost ­ Public awareness · Major Needs

  17. Ground-Source Heat Pumps in Cold Climates

    E-Print Network [OSTI]

    Wagner, Diane

    Ground-Source Heat Pumps in Cold Climates The Current State of the Alaska Industry, a Review-Source Heat Pumps in Cold Climates The Current State of the Alaska Industry, a Review of the Literature and contributions from individuals and organizations involved in ground-source heat pump installation around Alaska

  18. Pinpointing America's Geothermal Resources with Open Source Data...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    January 7, 2013 - 4:04pm Addthis When it comes to harnessing America's vast geothermal energy resources, knowing where to look is half the battle. Geothermal energy-the heat...

  19. Presented July 16, 2015 2:00 PM Geothermal & Solar Breakout Session

    E-Print Network [OSTI]

    Branoff, Theodore J.

    and cooling ­ Efficient use of electricity 1212 #12;1313 Ground source heat pump T= 55 F "Geothermal" #12;14 Ground source heat pump #12;15 Ground source heat pump heat pump COP 4 [Federal tax credit (30%)] Return = 17%/yr #12;16 Ground source heat pump heat pump preheat tank COP 4 #12;17 Ground source heat pump

  20. SIMULATION AND OPTIMAL CONTROL OF HYBRID GROUND SOURCE HEAT

    E-Print Network [OSTI]

    SIMULATION AND OPTIMAL CONTROL OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS By XIAOWEI XU Bachelor #12;ii SIMULATION AND OPTIMAL CONTROL OF HYBRID GROUND SOURCE HEAT PUMP SYSTEMS Dissertation Approved Loop Heat Exchanger Model....................................................... 11 2.1.1.1 Modeling

  1. Ground-source Heat Pumps Applied to Commercial Buildings

    SciTech Connect (OSTI)

    Parker, Steven A.; Hadley, Donald L.

    2009-07-14

    Ground-source heat pumps can provide an energy-efficient, cost-effective way to heat and cool commercial facilities. While ground-source heat pumps are well established in the residential sector, their application in larger, commercial-style, facilities is lagging, in part because of a lack of experience with the technology by those in decision-making positions. Through the use of a ground-coupling system, a conventional water-source heat pump design is transformed to a unique means of utilizing thermodynamic properties of earth and groundwater for efficient operation throughout the year in most climates. In essence, the ground (or groundwater) serves as a heat source during winter operation and a heat sink for summer cooling. Many varieties in design are available, so the technology can be adapted to almost any site. Ground-source heat pump systems can be used widely in commercial-building applications and, with proper installation, offer great potential for the commercial sector, where increased efficiency and reduced heating and cooling costs are important. Ground-source heat pump systems require less refrigerant than conventional air-source heat pumps or air-conditioning systems, with the exception of direct-expansion-type ground-source heat pump systems. This chapter provides information and procedures that an energy manager can use to evaluate most ground-source heat pump applications. Ground-source heat pump operation, system types, design variations, energy savings, and other benefits are explained. Guidelines are provided for appropriate application and installation. Two case studies are presented to give the reader a sense of the actual costs and energy savings. A list of manufacturers and references for further reading are included for prospective users who have specific or highly technical questions not fully addressed in this chapter. Sample case spreadsheets are provided in Appendix A. Additional appendixes provide other information on the ground-source heat pump technology.

  2. Kosciusko REMC- Residential Geothermal and Air-source Heat Pump Rebate Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    Kosciusko REMC offers rebates (as bill credits) to residential members for the purchase and installation of high efficiency air-source heat pumps, geothermal heat pumps, and electric water heaters....

  3. Investigating Ground Source Geothermal Heating for Garfield House

    E-Print Network [OSTI]

    Aalberts, Daniel P.

    of historical significance associated with Garfield, as it dates back to 1885, serving as a fraternity house heating oil consumption from January 2004 through December 2009, or 72 monthly values. Formulas were set and revised consumption rates were then assigned a conservative cost estimate based on retail price data from

  4. Ball State University Completes Nation's Largest Ground-Source Geothermal

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p uBUS SERVICE SUBSIDIES ATj.BOULDERofBadge

  5. Optimal Design for a Hybrid Ground-Source Heat Pump 

    E-Print Network [OSTI]

    Yu, Z.; Yuan, X.; Wang, B.

    2006-01-01

    Although the advantages of ground-source heat pumps over their conventional alternatives make these systems a very attractive choice for air conditioning, not only for residential buildings but increasingly also for institutional and commercial...

  6. Combined permeable pavement and ground source heat pump systems 

    E-Print Network [OSTI]

    Grabowiecki, Piotr

    2010-01-01

    The PhD thesis focuses on the performance assessment of permeable pavement systems incorporating ground source heat pumps (GSHP). The relatively high variability of temperature in these systems allows for the survival of ...

  7. 7-88 A geothermal power plant uses geothermal liquid water at 160C at a specified rate as the heat source. The actual and maximum possible thermal efficiencies and the rate of heat rejected from this power plant

    E-Print Network [OSTI]

    Bahrami, Majid

    7-31 7-88 A geothermal power plant uses geothermal liquid water at 160ºC at a specified rate and potential energy changes are zero. 3 Steam properties are used for geothermal water. Properties Using saturated liquid properties, the source and the sink state enthalpies of geothermal water are (Table A-4) k

  8. Application analysis of ground source heat pumps in building space conditioning

    E-Print Network [OSTI]

    Qian, Hua

    2014-01-01

    for ground-source heat pumps. in ASHRAE Summer Meeting.savings of ground source heat pump systems in Europe: Afor ground-source heat pumps: A literature review,

  9. Geothermal pipeline: Progress and development update, geothermal program monitor

    SciTech Connect (OSTI)

    1995-02-01

    This paper is a progress and development update describing three projects in the U.S. which involve the use of geothermal energy and ground-source heat pumps. The first project is located at Fort Polk Army Base in Louisiana. Four thousand government housing units are being retrofitted with efficient ground-soured near Bend, Oregon.

  10. Advanced Ground Source Heat Pump Technology for Very-Low-Energy...

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

    Ground Source Heat Pump Technology for Very-Low-Energy Buildings Advanced Ground Source Heat Pump Technology for Very-Low-Energy Buildings Three newunder-utilized ground loop...

  11. Application analysis of ground source heat pumps in building space conditioning

    SciTech Connect (OSTI)

    Qian, Hua; Wang, Yungang

    2013-07-01

    The adoption of geothermal energy in space conditioning of buildings through utilizing ground source heat pump (GSHP, also known as geothermal heat pump) has increased rapidly during the past several decades. However, the impacts of the GSHP utilization on the efficiency of heat pumps and soil temperature distribution remained unclear and needs further investigation. This paper presents a novel model to calculate the soil temperature distribution and the coefficient of performance (COP) of GSHP. Different scenarios were simulated to quantify the impact of different factors on the GSHP performance, including heat balance, daily running mode, and spacing between boreholes. Our results show that GSHP is suitable for buildings with balanced cooling and heating loads. It can keep soil temperature at a relatively constant level for more than 10 years. Long boreholes, additional space between boreholes, intermittent running mode will improve the performance of GSHP, but large initial investment is required. The improper design will make the COP of GSHP even lower than traditional heat pumps. Professional design and maintenance technologies are greatly needed in order to promote this promising technology in the developing world.

  12. Geothermal direct-heat utilization assistance: Quarterly project progress report, January--March 1995

    SciTech Connect (OSTI)

    1995-05-01

    The report summarizes geothermal activities of the Geo-Heat Center at Oregon Institute of Technology for the second quarter of FY-95. It describes 92 contacts with parties during this period related to technical assistance with geothermal direct heat projects. Areas dealt with include geothermal heat pumps, space heating, greenhouses, aquaculture, resources and equipment. Research activities are summarized on geothermal energy cost evaluation, low temperature resource assessment and ground-source heat pump case studies and utility programs. Outreach activities include the publication of a geothermal direct heat Bulletin, dissemination of information, geothermal library, and progress monitor reports on geothermal resources and utilization.

  13. Geothermal Energy Association Recognizes the National Geothermal...

    Broader source: Energy.gov (indexed) [DOE]

    Development and Demonstration Projects for up to 78 Million to Promote Enhanced Geothermal Systems Geothermal energy, traditionally a baseload power source among renewables,...

  14. Paper O.1.4.2 -1 -A SIMPLE TOOL FOR SIMULATION OF GROUND SOURCE HEAT

    E-Print Network [OSTI]

    Paper O.1.4.2 - 1 - A SIMPLE TOOL FOR SIMULATION OF GROUND SOURCE HEAT PUMP SYSTEMS Jeffrey D developed a number of ground heat exchanger models for use in simulation of ground source heat pump systems. Nevertheless, there are many situations where an easy to use hourly simulation of a ground source heat pump

  15. Guide to Geothermal Heat Pumps

    SciTech Connect (OSTI)

    None

    2011-02-01

    Geothermal heat pumps, also known as ground source heat pumps, geoexchange, water-source, earth-coupled, and earth energy heat pumps, take advantage of this resource and represent one of the most efficient and durable options on the market to heat and cool your home.

  16. Geothermal energy as a source of electricity. A worldwide survey of the design and operation of geothermal power plants

    SciTech Connect (OSTI)

    DiPippo, R.

    1980-01-01

    An overview of geothermal power generation is presented. A survey of geothermal power plants is given for the following countries: China, El Salvador, Iceland, Italy, Japan, Mexico, New Zealand, Philippines, Turkey, USSR, and USA. A survey of countries planning geothermal power plants is included. (MHR)

  17. SIMULATION AND VALIDATION OF HYBRID GROUND SOURCE AND WATER-LOOP HEAT PUMP

    E-Print Network [OSTI]

    SIMULATION AND VALIDATION OF HYBRID GROUND SOURCE AND WATER-LOOP HEAT PUMP SYSTEMS By JASON EARL AND VALIDATION OF HYBRID GROUND SOURCE AND WATER-LOOP HEAT PUMP SYSTEMS Thesis Approved: Dr. Jeffrey D. Spitler

  18. Discussion of an Optimization Scheme for the Ground Source Heat Pump System of HVAC 

    E-Print Network [OSTI]

    Mu, W.; Wang, S.; Pan, S.; Shi, Y.

    2006-01-01

    With the implementation of the global sustainable development strategy, people pay more attention to renewable energy resources such as ground source heat pumps. The technology of ground source heat pump is widely applied to heat and cold...

  19. 192 ASHRAE Transactions: Research Ground-source heat pumps for cooling-dominated

    E-Print Network [OSTI]

    Ghajar, Afshin J.

    operating and control strategies in a hybrid ground-source heat pump application using an hourly system performance, one of the available options is a hybrid ground-source heat pump application. Hybrid systems of Operating and Control Strategies for Hybrid Ground-Source Heat Pump Systems Using a Short Time Step

  20. HYBRID GROUND SOURCE HEAT PUMP SYSTEM SIMULATION USING VISUAL MODELING TOOL FOR HVACSIM+

    E-Print Network [OSTI]

    HYBRID GROUND SOURCE HEAT PUMP SYSTEM SIMULATION USING VISUAL MODELING TOOL FOR HVACSIM+ M.H. Khan, 74078, USA ABSTRACT This paper presents a simulation of a hybrid ground source heat pump system, performed using a new graphical user interface for HVACSIM+. Hybrid ground source heat pump systems

  1. Development of a Residential Ground-Source Integrated Heat Pump

    SciTech Connect (OSTI)

    Rice, C Keith [ORNL] [ORNL; Baxter, Van D [ORNL] [ORNL; Hern, Shawn [ClimateMaster, Inc.] [ClimateMaster, Inc.; McDowell, Tim [Thermal Energy System Specialists, LLC] [Thermal Energy System Specialists, LLC; Munk, Jeffrey D [ORNL] [ORNL; Shen, Bo [ORNL] [ORNL

    2013-01-01

    A residential-size ground-source integrated heat pump (GSIHP) system has been developed and is currently being field tested. The system is a nominal 2-ton (7 kW) cooling capacity, variable-speed unit, which is multi-functional, e.g. space cooling, space heating, dedicated water heating, and simultaneous space cooling and water heating. High-efficiency brushless permanent-magnet (BPM) motors are used for the compressor, indoor blower, and pumps to obtain the highest component performance and system control flexibility. Laboratory test data were used to calibrate a vapor-compression simulation model (HPDM) for each of the four primary modes of operation. The model was used to optimize the internal control options and to simulate the selected internal control strategies, such as controlling to a constant air supply temperature in the space heating mode and a fixed water temperature rise in water heating modes. Equipment performance maps were generated for each operation mode as functions of all independent variables for use in TRNSYS annual energy simulations. These were performed for the GSIHP installed in a well-insulated 2600 ft2(242 m2) house and connected to a vertical ground loop heat exchanger(GLHE). We selected a 13 SEER (3.8 CSPF )/7.7 HSPF (2.3 HSPF, W/W) ASHP unit with 0.90 Energy Factor (EF) resistance water heater as the baseline for energy savings comparisons. The annual energy simulations were conducted over five US climate zones. In addition, appropriate ground loop sizes were determined for each location to meet 10-year minimum and maximum design entering water temperatures (EWTs) to the equipment. The prototype GSIHP system was predicted to use 52 to 59% less energy than the baseline system while meeting total annual space conditioning and water heating loads.

  2. Influence of geothermal sources on deep ocean temperature, salinity, and flow fields. Doctoral thesis

    SciTech Connect (OSTI)

    Speer, K.G.

    1988-06-01

    The thesis studies the effect of geothermal sources on the deep circulation, temperature and salinity fields. In Chapter 1 background material is given on the strength and distribution of geothermal heating. In Chapter 2 evidence for the influence of a hydrothermal system in the rift valley of the Mid-Atlantic Ridge on nearby property fields and a model of the flow around such a heat source are presented, with an analysis of a larger-scale effect. Results of an analytical model for a heat source on a Beta-plane in Chapter 3 show how the response far from the source can have a structure different from the forcing because of its dependence on two parameters: a Peclet number (the ratio of horizontal advection and vertical diffusion), and a Froude-number-like parameter (the ratio of long wave phase speed to background flow speed) which control the relative amount of damping and advection of different vertical scales. The solutions emphasize the different behavior of a dynamical field like temperature compared to tracers introduced at the source. These ideas are useful for interpreting more-complicated solutions from a numerical model presented in the final chapter.

  3. Property:Geothermal/FundingSource | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to: navigation,Property EditMimeTypeGeofluidTemp JumpFY Jump to:FundingSource

  4. Inversion of synthetic aperture radar interferograms for sources of production-related subsidence at the Dixie Valley geothermal field

    E-Print Network [OSTI]

    Foxall, B.; Vasco, D.W.

    2008-01-01

    site and the Okuaizu geothermal field, Japan", Geothermics,at the Cerro Prieto geothermal field, Baja California,and seismicity in the Coso geothermal area, Inyo County,

  5. Inversion of synthetic aperture radar interferograms for sources of production-related subsidence at the Dixie Valley geothermal field

    E-Print Network [OSTI]

    Foxall, B.; Vasco, D.W.

    2008-01-01

    Nevada geothermal system”, Geothermal Resources CouncilStructure of the Dixie Valley geothermal system, a “typical”basin and range geothermal system, from thermal and gravity

  6. Feasibility Study of Using Ground Source Heat Pumps in Two Buildings

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    Feasibility Study of Using Ground Source Heat Pumps in Two Buildings at Whidbey Island Naval Air and Mt. Olympus BOQ) presently heated by steam from the central steam plant. Ground source heat pump source heat pumps provide both heating and cooling, there would essentially be no cost increase

  7. VOLUME 11, NUMBER 2 HVAC&R RESEARCH APRIL 2005 Ground-Source Heat Pump System Research--

    E-Print Network [OSTI]

    VOLUME 11, NUMBER 2 HVAC&R RESEARCH APRIL 2005 165 EDITORIAL Ground-Source Heat Pump System Research-- Past, Present, and Future J.D. Spitler, PhD, PE Fellow ASHRAE Ground-source heat pump (GSHP to Heinrich Zoelly is the first known reference to ground-source heat pump systems.2 In the US, some ground-source

  8. Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems

    E-Print Network [OSTI]

    Hong, Tainzhen

    2010-01-01

    type air-source VRF system and a GSHP system that uses single-stage scroll compressors and vertical ground loop heat exchanger (

  9. Finite Volume Based Computer Program for Ground Source Heat Pump Systems

    Broader source: Energy.gov [DOE]

    Project objective: Create a new modeling decision? tool that will enable ground source heat pump (GSHP) designers and customers to make better design and purchasing decisions.

  10. Geothermal energy

    SciTech Connect (OSTI)

    Renner, J.L. [Idaho National Engineering Laboratory, Idaho Fall, ID (United States); Reed, M.J. [Dept. of Energy, Washington, DC (United States)

    1993-12-31

    Use of geothermal energy (heat from the earth) has a small impact on the environmental relative to other energy sources; avoiding the problems of acid rain and greenhouse emissions. Geothermal resources have been utilized for centuries. US electrical generation began at The Geysers, California in 1960 and is now about 2300 MW. The direct use of geothermal heat for industrial processes and space conditioning in the US is about 1700 MW of thermal energy. Electrical production occurs in the western US and direct uses are found throughout the US. Typical geothermal power plants produce less than 5% of the CO{sub 2} released by fossil plants. Geothermal plants can now be configured so that no gaseous emissions are released. Sulfurous gases are effectively removed by existing scrubber technology. Potentially hazardous elements produced in geothermal brines are injected back into the producing reservoir. Land use for geothermal wells, pipelines, and power plants is small compared to land use for other extractive energy sources like oil, gas, coal, and nuclear. Per megawatt produced, geothermal uses less than one eighth the land that is used by a typical coal mine and power plant system. Geothermal development sites often co-exist with agricultural land uses like crop production or grazing.

  11. Ground Source Integrated Heat Pump (GS-IHP) Development

    SciTech Connect (OSTI)

    Baxter, V. D.; Rice, K.; Murphy, R.; Munk, J.; Ally, Moonis; Shen, Bo; Craddick, William; Hearn, Shawn A.

    2013-05-24

    Between October 2008 and May 2013 ORNL and ClimateMaster, Inc. (CM) engaged in a Cooperative Research and Development Agreement (CRADA) to develop a groundsource integrated heat pump (GS-IHP) system for the US residential market. A initial prototype was designed and fabricated, lab-tested, and modeled in TRNSYS (SOLAR Energy Laboratory, et al, 2010) to predict annual performance relative to 1) a baseline suite of equipment meeting minimum efficiency standards in effect in 2006 (combination of air-source heat pump (ASHP) and resistance water heater) and 2) a state-of-the-art (SOA) two-capacity ground-source heat pump with desuperheater water heater (WH) option (GSHPwDS). Predicted total annual energy savings, while providing space conditioning and water heating for a 2600 ft{sup 2} (242 m{sup 2}) house at 5 U.S. locations, ranged from 52 to 59%, averaging 55%, relative to the minimum efficiency suite. Predicted energy use for water heating was reduced 68 to 78% relative to resistance WH. Predicted total annual savings for the GSHPwDS relative to the same baseline averaged 22.6% with water heating energy use reduced by 10 to 30% from desuperheater contributions. The 1st generation (or alpha) prototype design for the GS-IHP was finalized in 2010 and field test samples were fabricated for testing by CM and by ORNL. Two of the alpha units were installed in 3700 ft{sup 2} (345 m{sup 2}) houses at the ZEBRAlliance site in Oak Ridge and field tested during 2011. Based on the steady-state performance demonstrated by the GS-IHPs it was projected that it would achieve >52% energy savings relative to the minimum efficiency suite at this specific site. A number of operational issues with the alpha units were identified indicating design changes needed to the system before market introduction could be accomplished. These were communicated to CM throughout the field test period. Based on the alpha unit test results and the diagnostic information coming from the field test experience, CM developed a 2nd generation (or beta) prototype in 2012. Field test verification units were fabricated and installed at the ZEBRAlliance site in Oak Ridge in May 2012 and at several sites near CM headquarters in Oklahoma. Field testing of the units continued through February 2013. Annual performance analyses of the beta unit (prototype 2) with vertical well ground heat exchangers (GHX) in 5 U.S. locations predict annual energy savings of 57% to 61%, averaging 59% relative to the minimum efficiency suite and 38% to 56%, averaging 46% relative to the SOA GSHPwDS. Based on the steady-state performance demonstrated by the test units it was projected that the 2nd generation units would achieve ~58% energy savings relative to the minimum efficiency suite at the Zebra Alliance site with horizontal GHX. A new product based on the beta unit design was announced by CM in 2012 – the Trilogy 40® Q-mode™ (http://cmdealernet.com/trilogy_40.html). The unit was formally introduced in a March 2012 press release (see Appendix A) and was available for order beginning in December 2012.

  12. National Certification Standard for Ground Source Heat Pump Personnel

    SciTech Connect (OSTI)

    Kelly, John

    2013-07-31

    The National Certification Standard for the Geothermal Heat Pump Industry adds to the understanding of the barriers to rapid growth of the geothermal heat pump (GHP) industry by bringing together for the first time an analysis of the roles and responsibilities of each of the individual job tasks involved in the design and installation of GHP systems. The standard addresses applicable qualifications for all primary personnel involved in the design, installation, commissioning, operation and maintenance of GHP systems, including their knowledge, skills and abilities. The resulting standard serves as a foundation for subsequent development of curriculum, training and certification programs, which are not included in the scope of this project, but are briefly addressed in the standard to describe ways in which the standard developed in this project may form a foundation to support further progress in accomplishing those other efforts. Follow-on efforts may use the standard developed in this project to improve the technical effectiveness and economic feasibility of curriculum development and training programs for GHP industry personnel, by providing a more complete and objective assessment of the individual job tasks necessary for successful implementation of GHP systems. When incorporated into future certification programs for GHP personnel, the standard will facilitate increased consumer confidence in GHP technology, reduce the potential for improperly installed GHP systems, and assure GHP system quality and performance, all of which benefit the public through improved energy efficiency and mitigated environmental impacts of the heating and cooling of homes and businesses.

  13. MODELING OF STANDING COLUMN WELLS IN GROUND SOURCE HEAT PUMP SYSTEMS

    E-Print Network [OSTI]

    MODELING OF STANDING COLUMN WELLS IN GROUND SOURCE HEAT PUMP SYSTEMS By ZHENG DENG Bachelor December, 2004 #12;ii MODELING OF STANDING COLUMN WELLS IN GROUND SOURCE HEAT PUMP SYSTEMS Thesis Approved) ..................................................................... 6 1.3. Basic physical mechanism in SCWs (heat transfer and mass transfer in porous media

  14. PERFORMANCE ANALYSIS OF A RESIDENTIAL GROUND SOURCE HEAT PUMP SYSTEM WITH ANTIFREEZE SOLUTION

    E-Print Network [OSTI]

    PERFORMANCE ANALYSIS OF A RESIDENTIAL GROUND SOURCE HEAT PUMP SYSTEM WITH ANTIFREEZE SOLUTION M in a ground source heat pump system falls near or below 0o C, an antifreeze mixture must be used to prevent freezing in the heat pump. The antifreeze mixture type and concentration has a number of implications

  15. 192 ASHRAE Transactions: Research Ground-source heat pumps for cooling-dominated

    E-Print Network [OSTI]

    192 ASHRAE Transactions: Research ABSTRACT Ground-source heat pumps for cooling- tion of the heat pump performance is avoided by offsetting the annual load imbalance in the borefield operating and control strategies in a hybrid ground-source heat pump application using an hourly system

  16. Efficiency, Economic and Environmental Assessment of Ground-Source Heat Pumps in

    E-Print Network [OSTI]

    Blumsack, Seth

    1 Efficiency, Economic and Environmental Assessment of Ground-Source Heat Pumps in Central pump (GSP) for heating, cooling and hot water in a Central Pennsylvania residence (namely, the author, the efficiency gain for the ground-source heat pump compared to electricity is 43% for cooling and 81

  17. COMPARATIVE STUDY AMONG HYBRID GROUND SOURCE HEAT PUMP SYSTEM, COMPLETE GROUND SOURCE HEAT PUMP AND CONVENTIONAL HVAC SYSTEM

    SciTech Connect (OSTI)

    Jiang Zhu; Yong X. Tao

    2011-11-01

    In this paper, a hotel with hybrid geothermal heat pump system (HyGSHP) in the Pensacola is selected and simulated by the transient simulation software package TRNSYS [1]. To verify the simulation results, the validations are conducted by using the monthly average entering water temperature, monthly facility consumption data, and etc. And three types of HVAC systems are compared based on the same building model and HVAC system capacity. The results are presented to show the advantages and disadvantages of HyGSHP compared with the other two systems in terms of energy consumptions, life cycle cost analysis.

  18. Geothermal Energy and the Academic Environment University of British Columbia Okanagan

    E-Print Network [OSTI]

    the frost line, stays at approximately 50 °F (10 °C) year round and a water- source heat pump uses that available heat in the winter and puts heat back into the ground in the summer. Geothermal heat pump systems Education Office 2000). A geothermal heat pump system is a heating, ventilation, and air conditioning (HVAC

  19. Study of the design Method of an Efficient Ground Source Heat Pump Thermal Source System in a Cold Area 

    E-Print Network [OSTI]

    Shu, H.; Duanmu, L.; Hua, R.; Zou, Y.; Du, G.

    2006-01-01

    The ground source heat pump (GSHP) system-an energy efficiency and environment friendly system-is becoming popular in many parts of China. However, an imbalance usually exists between the annual heat extracted from and rejected to the ground due...

  20. MICROSEISMS IN GEOTHERMAL EXPLORATION: STUDIES IN GRASS VALLEY, NEVADA

    E-Print Network [OSTI]

    Liaw, A.L.C.

    2011-01-01

    period seismic noise (T>30 sec) . . . 2.5 Geothermal ground226. Clacy, G.R.T. ? 1968, Geothermal ground noise amplitudestudies at the Cos0 geothermal area, China Lake, California:

  1. GEOTHERMAL RESERVOIR ENGINEERING MANGEMENT PROGRAM PLAN (GREMP PLAN)

    E-Print Network [OSTI]

    Bloomster, C.H.

    2010-01-01

    2 Mission of Division of Geothermal Energy . . . . .Milora and J . W. Tester, Geothermal Energy as a Source o fNations Symposium on Geothermal Energy, San Francisco, May

  2. Federal Technology Alert: Ground-Source Heat Pumps Applied to Federal Facilities--Second Edition

    SciTech Connect (OSTI)

    Hadley, Donald L.

    2001-03-01

    This Federal Technology Alert, which was sponsored by the U.S. Department of Energy's Office of Federal Energy Management Programs, provides the detailed information and procedures that a Federal energy manager needs to evaluate most ground-source heat pump applications. This report updates an earlier report on ground-source heat pumps that was published in September 1995. In the current report, general benefits of this technology to the Federal sector are described, as are ground-source heat pump operation, system types, design variations, energy savings, and other benefits. In addition, information on current manufacturers, technology users, and references for further reading are provided.

  3. Ground Source Heat Pump Subprogram Overview | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,Executive CompensationEnergyGetDepartment1 Grid-InteractiveGrossGround

  4. MULTIPARAMETER OPTIMIZATION STUDIES ON GEOTHERMAL ENERGY CYCLES

    E-Print Network [OSTI]

    Pope, W.L.

    2011-01-01

    and J. W. Tester, Geothermal Energy as a Source of Electricat the Susanville Geothermal Energy Converence, July 1976.and J. W. Tester, Geothermal Energy as a Source of Electric

  5. Short communication Optimization of hybrid ground coupled and air source heat pump systems

    E-Print Network [OSTI]

    Fernández de Córdoba, Pedro

    Short communication Optimization of hybrid ­ ground coupled and air source ­ heat pump systems 2008 Accepted 14 January 2010 Available online 28 January 2010 Keywords: Ground coupled heat pump Air to water heat pump Thermal storage device Hybrid HVAC system Energy efficiency Numerical simulation a b

  6. Ground source heat storage and thermo-physical response of soft clay

    E-Print Network [OSTI]

    Saxe, Shoshanna Dawn

    2009-01-01

    Ground source heat storage can condition buildings with reduced consumption of fossil fuels, an important issue in modem building design. However, seasonal heat storage can cause soil temperature fluctuations and possibly ...

  7. Ground and Water Source Heat Pump Performance and Design for Southern Climates 

    E-Print Network [OSTI]

    Kavanaugh, S.

    1988-01-01

    Ground and water source heat pump systems have very attractive performance characteristics when properly designed and installed. These systems typically consist of a water-to-air or water-to-water heat pump linked to a closed loop vertical...

  8. Dispersion modeling of ground-level area sources of particulate 

    E-Print Network [OSTI]

    Fritz, Bradley Keith

    1998-01-01

    The use of dispersion modeling by State Air Pollution hics. Regulatory Agencies (SAPRAS) is increasing. Dispersion modeling provides a quick and efficient means of determining the downwind impact of pollutant release from a source. The SAPRAS...

  9. Ground-Source Integrated Heat Pump for Near-Zero Energy Houses: Technology Status Report

    SciTech Connect (OSTI)

    Murphy, Richard W; Rice, C Keith; Baxter, Van D; Craddick, William G

    2007-09-01

    The energy service needs of a net-zero-energy house (ZEH) include space heating and cooling, water heating, ventilation, dehumidification, and humidification, depending on the requirements of the specific location. These requirements differ in significant ways from those of current housing. For instance, the most recent DOE buildings energy data (DOE/BED 2007) indicate that on average {approx}43% of residential buildings primary energy use is for space heating and cooling, vs. {approx}12% for water heating (about a 3.6:1 ratio). In contrast, for the particular prototype ZEH structures used in the analyses in this report, that ratio ranges from about 0.3:1 to 1.6:1 depending on location. The high-performance envelope of a ZEH results in much lower space heating and cooling loads relative to current housing and also makes the house sufficiently air-tight to require mechanical ventilation for indoor air quality. These envelope characteristics mean that the space conditioning load will be closer in size to the water heating load, which depends on occupant behavior and thus is not expected to drop by any significant amount because of an improved envelope. In some locations such as the Gulf Coast area, additional dehumidification will almost certainly be required during the shoulder and cooling seasons. In locales with heavy space heating needs, supplemental humidification may be needed because of health concerns or may be desired for improved occupant comfort. The U.S. Department of Energy (DOE) has determined that achieving their ZEH goal will require energy service equipment that can meet these needs while using 50% less energy than current equipment. One promising approach to meeting this requirement is through an integrated heat pump (IHP) - a single system based on heat pumping technology. The energy benefits of an IHP stem from the ability to utilize otherwise wasted energy; for example, heat rejected by the space cooling operation can be used for water heating. With the greater energy savings the cost of the more energy efficient components required for the IHP can be recovered more quickly than if they were applied to individual pieces of equipment to meet each individual energy service need. An IHP can be designed to use either outdoor air or geothermal resources (e.g., ground, ground water, surface water) as the environmental energy source/sink. Based on a scoping study of a wide variety of possible approaches to meeting the energy service needs for a ZEH, DOE selected the IHP concept as the most promising and has supported research directed toward the development of both air- and ground-source versions. This report describes the ground-source IHP (GS-IHP) design and includes the lessons learned and best practices revealed by the research and development (R&D) effort throughout. Salient features of the GS-IHP include a variable-speed rotary compressor incorporating a brushless direct current permanent magnet motor which provides all refrigerant compression, a variable-speed fan for the indoor section, a multiple-speed ground coil circuit pump, and a single-speed pump for water heating operation. Laboratory IHP testing has thus far used R-22 because of the availability of the needed components that use this refrigerant. It is expected that HFC R-410A will be used for any products arising from the IHP concept. Data for a variable-speed compressor that uses R-410A has been incorporated into the DOE/ORNL Mark VI Heat Pump Design Model (HPDM). HPDM was then linked to TRNSYS, a time-series-dependent simulation model capable of determining the energy use of building cooling and heating equipment as applied to a defined house on a sub-hourly basis. This provided a highly flexible design analysis capability for advanced heat pump equipment; however, the program also took a relatively long time to run. This approach was used with the initial prototype design reported in Murphy et al. (2007a) and in the business case analysis of Baxter (2007).

  10. Ground Source Heat Pump Sub-Slab Heat Exchange Loop Performance in a Cold Climate

    SciTech Connect (OSTI)

    Mittereder, Nick; Poerschke, Andrew

    2013-11-01

    This report presents a cold-climate project that examines an alternative approach to ground source heat pump (GSHP) ground loop design. The innovative ground loop design is an attempt to reduce the installed cost of the ground loop heat exchange portion of the system by containing the entire ground loop within the excavated location beneath the basement slab. Prior to the installation and operation of the sub-slab heat exchanger, energy modeling using TRNSYS software and concurrent design efforts were performed to determine the size and orientation of the system. One key parameter in the design is the installation of the GSHP in a low-load home, which considerably reduces the needed capacity of the ground loop heat exchanger. This report analyzes data from two cooling seasons and one heating season.

  11. Recovery of energy from geothermal brine and other hot water sources

    DOE Patents [OSTI]

    Wahl, III, Edward F. (Claremont, CA); Boucher, Frederic B. (San Juan Capistrano, CA)

    1981-01-01

    Process and system for recovery of energy from geothermal brines and other hot water sources, by direct contact heat exchange between the brine or hot water, and an immiscible working fluid, e.g. a hydrocarbon such as isobutane, in a heat exchange column, the brine or hot water therein flowing countercurrent to the flow of the working fluid. The column can be operated at subcritical, critical or above the critical pressure of the working fluid. Preferably, the column is provided with a plurality of sieve plates, and the heat exchange process and column, e.g. with respect to the design of such plates, number of plates employed, spacing between plates, area thereof, column diameter, and the like, are designed to achieve maximum throughput of brine or hot water and reduction in temperature differential at the respective stages or plates between the brine or hot water and the working fluid, and so minimize lost work and maximize efficiency, and minimize scale deposition from hot water containing fluid including salts, such as brine. Maximum throughput approximates minimum cost of electricity which can be produced by conversion of the recovered thermal energy to electrical energy.

  12. Geothermal Energy Retrofit

    SciTech Connect (OSTI)

    Bachman, Gary

    2015-07-28

    The Cleary University Geothermal Energy Retrofit project involved: 1. A thermal conductivity test; 2. Assessment of alternative horizontal and vertical ground heat exchanger options; 3. System design; 4. Asphalt was stripped from adjacent parking areas and a vertical geothermal ground heat exchanger system installed; 5. the ground heat exchanger was connected to building; 6. a system including 18 heat pumps, control systems, a manifold and pumps, piping for fluid transfer and ductwork for conditioned air were installed throughout the building.

  13. South Dakota geothermal handbook

    SciTech Connect (OSTI)

    Not Available

    1980-06-01

    The sources of geothermal fluids in South Dakota are described and some of the problems that exist in utilization and materials selection are described. Methods of heat extraction and the environmental concerns that accompany geothermal fluid development are briefly described. Governmental rules, regulations and legislation are explained. The time and steps necessary to bring about the development of the geothermal resource are explained in detail. Some of the federal incentives that encourage the use of geothermal energy are summarized. (MHR)

  14. Geothermal Heat Pumps are Scoring High Marks

    SciTech Connect (OSTI)

    2000-08-01

    Geothermal Energy Program Office of Geothermal and Wind Technologies Geothermal Heat Pumps are Scoring High Marks Geothermal heat pumps, one of the clean energy technology stars Geothermal heat pumps (GHPs) are one of the most cost-effective heating, cooling, and water heating systems available for both residential and commercial buildings. GHPs extract heat from the ground during the heating season and discharge waste heat to the ground during the cooling season. The U.S. Environmental Protecti

  15. Funding Mechanisms for Federal Geothermal Permitting (Presentation)

    SciTech Connect (OSTI)

    Witherbee, K.

    2014-03-01

    This presentation is about the GRC paper, which discusses federal agency revenues received for geothermal projects and potential federal agency budget sources for processing geothermal applications.

  16. PROCEEDINGS, Thirty-Fifth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 1-3, 2010

    E-Print Network [OSTI]

    Stanford University

    and aquaculture facilities, space heating and district heating, snow melting, agricultural drying, industrial applications and ground-source heat pumps. The installed capacity is 12,611 MWt and the annual energy use is 56,552 TJ or 15,709 GWh. The largest application is ground-source (geothermal) heat pumps (84% of the energy

  17. Ball State Completes Largest U.S. Ground-Source Geothermal System |

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment|Marketing, LLC | Department4 The26ShipmentsBuildingschool

  18. GUIDELINES MANUAL FOR SURFACE MONITORING OF GEOTHERMAL AREAS

    E-Print Network [OSTI]

    Til, C. J. Van

    2012-01-01

    1976, "Blowout o f a Geothermal Well", California Geology,in Rocks from Two Geothermal Areas'' , -- P1 anetary ScienceMonitoring Ground Movement in Geothermal Areas", Hydraul ic

  19. Designing, selecting and installing a residential ground-source heat pump system

    SciTech Connect (OSTI)

    Hughes, Patrick [ORNL; Liu, Xiaobing [ORNL; Munk, Jeffrey D [ORNL

    2010-01-01

    It's a compelling proposition: Use the near-constant-temperature heat underground to heat and cool your home and heat domestic water, slashing your energy bills. Yet despite studies demonstrating significant energy savings from ground-source heat pump (GSHP) systems, their adoption has been hindered by high upfront costs. Fewer than 1% of US homes use a GSHP system. However, compared to a minimum-code-compliant conventional space-conditioning system, when properly designed and installed, a GSHP retrofit at current market prices offers simple payback of 4.3 years on national average, considering existing federal tax credits. Most people understand how air-source heat pumps work: they move heat from indoor air to outdoor air when cooling and from outdoor air to indoor air when heating. The ground-source heat pump operates on the same principle, except that it moves heat to or from the ground source instead of outdoor air. The ground source is usually a vertical or horiontal ground heat exchanger. Because the ground usually has a more favorable temperature than ambient air for the heating and cooling operation of the vapor-compression refrigeration cycle, GSHP sysems can operate with much higher energy efficiencies than air-source heat pump systems when properly designed and installed. A GSHP system used in a residual building typically provides space conditioning and hot water and comprises three major components: a water-source heat pump unit designed to operate at a wider range of entering fluid temperatures (typically from 30 F to 110 F, or 1 C to 43 C) than a conventional water-source heat pump unit; a ground heat exchanger (GHX); and distribution systems to deliver hot water to the storage tank and heating or cooling to the conditioned rooms. In most residual GSHP systems, the circulation pumps and associated valves are integrated with the heat pump to circulate the heat-carrier fluid (water or aqueous antifreeze solution) through the heat pump and the GHX. A recent assessment indicates that if 20% of US homes replaced their existing space-conditioning and water-heating systems with properly designed, installed and operated state-of-the-art GSHP systems, it would yield significant benefits each year. These include 0.8 quad British thermal units (Btu) of primary energy savings, 54.3 million metric tons of CO{sub 2} emission reductions, $10.4 billion in energy cost savings and 43.2 gigawatts of reduction in summer peak electrical demand.

  20. Ground Source Heat Pump Sub-Slab Heat Exchange Loop Performance in a Cold Climate

    SciTech Connect (OSTI)

    Mittereder, N.; Poerschke, A.

    2013-11-01

    This report presents a cold-climate project that examines an alternative approach to ground source heat pump (GSHP) ground loop design. The innovative ground loop design is an attempt to reduce the installed cost of the ground loop heat exchange portion of the system by containing the entire ground loop within the excavated location beneath the basement slab. Prior to the installation and operation of the sub-slab heat exchanger, energy modeling using TRNSYS software and concurrent design efforts were performed to determine the size and orientation of the system. One key parameter in the design is the installation of the GSHP in a low-load home, which considerably reduces the needed capacity of the ground loop heat exchanger. This report analyzes data from two cooling seasons and one heating season. Upon completion of the monitoring phase, measurements revealed that the initial TRNSYS simulated horizontal sub-slab ground loop heat exchanger fluid temperatures and heat transfer rates differed from the measured values. To determine the cause of this discrepancy, an updated model was developed utilizing a new TRNSYS subroutine for simulating sub-slab heat exchangers. Measurements of fluid temperature, soil temperature, and heat transfer were used to validate the updated model.

  1. Technology Solutions Case Study: Ground Source Heat Pump Research, TaC Studios Residence, Atlanta, Georigia

    SciTech Connect (OSTI)

    2014-09-01

    This case study describes the construction of a new test home that demonstrates current best practices for the mixed-humid climate, including a high performance ground source heat pump for heating and cooling, a building envelope featuring advanced air sealing details and low-density spray foam insulation, and glazing that exceeds ENERGY STAR requirements.

  2. A Novel Integrated Frozen Soil Thermal Energy Storage and Ground-Source Heat Pump System 

    E-Print Network [OSTI]

    Jiang, Y.; Yao, Y.; Rong, L.; Ma, Z.

    2006-01-01

    In this paper, a novel integrated frozen soil thermal energy storage and ground-source heat pump (IFSTS&GSHP) system in which the GHE can act as both cold thermal energy storage device and heat exchanger for GSHP is first presented. The IFSTS...

  3. Payback Analysis for Ground Source Heat Pump Retrofits Using eQuest Modeling Software

    E-Print Network [OSTI]

    Wahlers, Drake

    2011-12-16

    There has been much research and analysis done on the performance and potential energy savings related to installing a ground source heat pump (GSHP) system. Much of this research has been dedicated to the new construction industry, and focused on a...

  4. Geothermal Retrofit of Illinois National Guard's State headquarters Building

    SciTech Connect (OSTI)

    Lee, Mark

    2015-04-27

    The goal of this project was to assess the feasibility of utilizing mine water as a heat sink for a geothermal heat pump system to heat and cool the 74,000 sq. ft. Illinois National Guard State Headquarters’ building in Springfield Illinois. If successful, this type of system would be less expensive to install than a traditional closed loop geothermal (ground source) heat pump system by significantly reducing the size of the well field, thus shortening or eliminate the payback period compared to a conventional system. In the end, a conventional ground loop was used for the project.

  5. Field Test of High Efficiency Residential Buildings with Ground-source and Air-source Heat Pump Systems

    SciTech Connect (OSTI)

    Ally, Moonis Raza [ORNL] [ORNL; Munk, Jeffrey D [ORNL] [ORNL; Baxter, Van D [ORNL] [ORNL

    2011-01-01

    This paper describes the field performance of space conditioning and water heating equipment in four single-family residential structures with advanced thermal envelopes. Each structure features a different, advanced thermal envelope design: structural insulated panel (SIP); optimum value framing (OVF); insulation with embedded phase change materials (PCM) for thermal storage; and exterior insulation finish system (EIFS). Three of the homes feature ground-source heat pumps (GSHPs) for space conditioning and water heating while the fourth has a two-capacity air-source heat pump (ASHP) and a heat pump water heater (HPWH). Two of the GCHP-equipped homes feature horizontal ground heat exchange (GHX) loops that utillize the existing foundation and utility service trenches while the third features a vertical borehole with vertical u-tube GHX. All of the houses were operated under the same simulated occupancy conditions. Operational data on the house HVAC/Water heating (WH) systems are presented and factors influencing overall performance are summarized.

  6. Energy 101: Geothermal Heat Pumps

    Broader source: Energy.gov [DOE]

    An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe ...

  7. Burgett Geothermal Greenhouses Greenhouse Low Temperature Geothermal...

    Open Energy Info (EERE)

    Burgett Geothermal Greenhouses Greenhouse Low Temperature Geothermal Facility Jump to: navigation, search Name Burgett Geothermal Greenhouses Greenhouse Low Temperature Geothermal...

  8. Energy 101: Geothermal Heat Pumps

    SciTech Connect (OSTI)

    None

    2011-01-01

    An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe "loops" containing water. This edition of Energy 101 explores the benefits Geothermal and the science behind how it all comes together.

  9. Energy 101: Geothermal Heat Pumps

    ScienceCinema (OSTI)

    None

    2013-05-29

    An energy-efficient heating and cooling alternative, the geothermal heat pump system moves heat from the ground to a building (or from a building to the ground) through a series of flexible pipe "loops" containing water. This edition of Energy 101 explores the benefits Geothermal and the science behind how it all comes together.

  10. Geothermal resources of Montana

    SciTech Connect (OSTI)

    Metesh, J.

    1994-06-01

    The Montana Bureau of Mines and Geology has updated its inventory of low and moderate temperature resources for the state and has assisted the Oregon Institute of Technology - GeoHeat Center and the University of Utah Research Institute in prioritizing and collocating important geothermal resource areas. The database compiled for this assessment contains information on location, flow, water chemistry, and estimated reservoir temperatures for 267 geothermal well and springs in Montana. For this assessment, the minimum temperature for low-temperature resource is defined as 10{degree} C above the mean annual air temperature at the surface. The maximum temperature for a moderate-temperature resource is defined as greater than 50{degree} C. Approximately 12% of the wells and springs in the database have temperatures above 50{degree} C, 17% are between 30{degree} and 50{degree} C, 29% are between 20{degree} and 30{degree}C, and 42% are between 10{degree} and 20{degree} C. Low and moderate temperature wells and springs can be found in nearly all areas of Montana, but most are in the western third of the state. Information sources for the current database include the MBMG Ground Water Information Center, the USGS statewide database, the USGS GEOTHERM database, and new information collected as part of this program. Five areas of Montana were identified for consideration in future investigations of geothermal development. The areas identified are those near Bozeman, Ennis, Butte, Boulder, and Camas Prairie. These areas were chosen based on the potential of the resource and its proximity to population centers.

  11. Pumpernickel Valley Geothermal Project Thermal Gradient Wells

    SciTech Connect (OSTI)

    Z. Adam Szybinski

    2006-01-01

    The Pumpernickel Valley geothermal project area is located near the eastern edge of the Sonoma Range and is positioned within the structurally complex Winnemucca fold and thrust belt of north-central Nevada. A series of approximately north-northeast-striking faults related to the Basin and Range tectonics are superimposed on the earlier structures within the project area, and are responsible for the final overall geometry and distribution of the pre-existing structural features on the property. Two of these faults, the Pumpernickel Valley fault and Edna Mountain fault, are range-bounding and display numerous characteristics typical of strike-slip fault systems. These characteristics, when combined with geophysical data from Shore (2005), indicate the presence of a pull-apart basin, formed within the releasing bend of the Pumpernickel Valley – Edna Mountain fault system. A substantial body of evidence exists, in the form of available geothermal, geological and geophysical information, to suggest that the property and the pull-apart basin host a structurally controlled, extensive geothermal field. The most evident manifestations of the geothermal activity in the valley are two areas with hot springs, seepages, and wet ground/vegetation anomalies near the Pumpernickel Valley fault, which indicate that the fault focuses the fluid up-flow. There has not been any geothermal production from the Pumpernickel Valley area, but it was the focus of a limited exploration effort by Magma Power Company. In 1974, the company drilled one exploration/temperature gradient borehole east of the Pumpernickel Valley fault and recorded a thermal gradient of 160oC/km. The 1982 temperature data from five unrelated mineral exploration holes to the north of the Magma well indicated geothermal gradients in a range from 66 to 249oC/km for wells west of the fault, and ~283oC/km in a well next to the fault. In 2005, Nevada Geothermal Power Company drilled four geothermal gradient wells, PVTG-1, -2, -3, and -4, and all four encountered geothermal fluids. The holes provided valuable water geochemistry, supporting the geothermometry results obtained from the hot springs and Magma well. The temperature data gathered from all the wells clearly indicates the presence of a major plume of thermal water centered on the Pumpernickel Valley fault, and suggests that the main plume is controlled, at least in part, by flow from this fault system. The temperature data also defines the geothermal resource with gradients >100oC/km, which covers an area a minimum of 8 km2. Structural blocks, down dropped with respect to the Pumpernickel Valley fault, may define an immediate reservoir. The geothermal system almost certainly continues beyond the recently drilled holes and might be open to the east and south, whereas the heat source responsible for the temperatures associated with this plume has not been intersected and must be at a depth greater than 920 meters (depth of the deepest well – Magma well). The geological and structural setting and other characteristics of the Pumpernickel Valley geothermal project area are markedly similar to the portions of the nearby Dixie Valley geothermal field. These similarities include, among others, the numerous, unexposed en echelon faults and large-scale pull-apart structure, which in Dixie Valley may host part of the geothermal field. The Pumpernickel Valley project area, for the majority of which Nevada Geothermal Power Company has geothermal rights, represents a geothermal site with a potential for the discovery of a relatively high temperature reservoir suitable for electric power production. Among locations not previously identified as having high geothermal potential, Pumpernickel Valley has been ranked as one of four sites with the highest potential for electrical power production in Nevada (Shevenell and Garside, 2003). Richards and Blackwell (2002) estimated the total heat loss and the preliminary production capacity for the entire Pumpernickel Valley geothermal system to be at 35MW. A more conservative estimate, for

  12. Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems

    SciTech Connect (OSTI)

    Hong, Tainzhen; Liu, Xaiobing

    2009-11-01

    With the current movement toward net zero energy buildings, many technologies are promoted with emphasis on their superior energy efficiency. The variable refrigerant flow (VRF) and ground source heat pump (GSHP) systems are probably the most competitive technologies among these. However, there are few studies reporting the energy efficiency of VRF systems compared with GSHP systems. In this article, a preliminary comparison of energy efficiency between the air-source VRF and GSHP systems is presented. The computer simulation results show that GSHP system is more energy efficient than the air-source VRF system for conditioning a small office building in two selected US climates. In general, GSHP system is more energy efficient than the air-source VRV system, especially when the building has significant heating loads. For buildings with less heating loads, the GSHP system could still perform better than the air-source VRF system in terms of energy efficiency, but the resulting energy savings may be marginal.

  13. Renewable energy technologies for federal facilities: Geothermal heat pump

    SciTech Connect (OSTI)

    1996-05-01

    This sheet summarizes information on geothermal heat pumps (GHPs), which extracts heat from the ground in the winter and transfers heat to the ground in the summer. More than 200,000 GHPs are operating in US; they can reduce energy consumption and related emissions by 23 to 44% compared to air-source heat pumps. Opportunities for use of GHPs, requirements, and cost are described. Important terms are defined.

  14. Ball State building massive geothermal system

    Broader source: Energy.gov [DOE]

    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 geothermal technology on a district-wide scale,” and provide health benefits such as reducing asthma rates for Indiana residents, says Philip Sachtleben, Ball State’s associate vice president of governmental relations. The system will cool and heat nearly 50 buildings on Ball State’s Muncie, Ind., campus, replace four coal-burning boilers and span more than 600 acres. The switch to geothermal will save the university $2.2 million in fuel costs and cut its carbon footprint in half.

  15. Liu, Rees and Spitler. 1 Simulation of a Geothermal Bridge Deck Anti-icing System and Experimental Validation

    E-Print Network [OSTI]

    Liu, Rees and Spitler. 1 Simulation of a Geothermal Bridge Deck Anti-icing System and Experimental and a ground-coupled heat pump system with vertical borehole heat exchangers as a heat source. The models pumps that, in turn, extract heat with the ground via vertical U-tube borehole heat exchangers (Fig.1

  16. Geothermal Today - 2001

    SciTech Connect (OSTI)

    2001-08-01

    U.S. Department of Energy Geothermal Energy Program Highlights Partnering with Industry A New Power Source for Nevada Drilling Research Finding Geothermal Resources Small-Scale Geothermal Power Plants The Heat Beneath Your Feet R&D 100 Award Program in Review Milestones January 2000 The U.S. Department of Energy GeoPowering the West initiative was launched. February 2000 Grants totaling $4.8 million were awarded in six western states, primarily for development of reservoir exploration, character

  17. Geothermal Financing Workbook

    SciTech Connect (OSTI)

    Battocletti, E.C.

    1998-02-01

    This report was prepared to help small firm search for financing for geothermal energy projects. There are various financial and economics formulas. Costs of some small overseas geothermal power projects are shown. There is much discussion of possible sources of financing, especially for overseas projects. (DJE-2005)

  18. Numerical Simulation of a Latent Heat Storage System of a Solar-Aided Ground Source Heat Pump 

    E-Print Network [OSTI]

    Wang, F.; Zheng, M.; Li, Z.; Lei, B.

    2006-01-01

    In this study, the rectangular phase change storage tank (PCST) linked to a solar-aided ground source heat pump (SAGSHP) system is investigated experimentally and theoretically. The container of the phase change material ...

  19. A comparison of ground source heat pumps and micro-combined heat and power as residential greenhouse gas reduction strategies

    E-Print Network [OSTI]

    Guyer, Brittany (Brittany Leigh)

    2009-01-01

    Both ground source heat pumps operating on electricity and micro-combined heat and power systems operating on fossil fuels offer potential for the reduction of green house gas emissions in comparison to the conventional ...

  20. Finite Volume Based Computer Program for Ground Source Heat Pump System

    SciTech Connect (OSTI)

    Menart, James A.

    2013-02-22

    This report is a compilation of the work that has been done on the grant DE-EE0002805 entitled ?Finite Volume Based Computer Program for Ground Source Heat Pump Systems.? The goal of this project was to develop a detailed computer simulation tool for GSHP (ground source heat pump) heating and cooling systems. Two such tools were developed as part of this DOE (Department of Energy) grant; the first is a two-dimensional computer program called GEO2D and the second is a three-dimensional computer program called GEO3D. Both of these simulation tools provide an extensive array of results to the user. A unique aspect of both these simulation tools is the complete temperature profile information calculated and presented. Complete temperature profiles throughout the ground, casing, tube wall, and fluid are provided as a function of time. The fluid temperatures from and to the heat pump, as a function of time, are also provided. In addition to temperature information, detailed heat rate information at several locations as a function of time is determined. Heat rates between the heat pump and the building indoor environment, between the working fluid and the heat pump, and between the working fluid and the ground are computed. The heat rates between the ground and the working fluid are calculated as a function time and position along the ground loop. The heating and cooling loads of the building being fitted with a GSHP are determined with the computer program developed by DOE called ENERGYPLUS. Lastly COP (coefficient of performance) results as a function of time are provided. Both the two-dimensional and three-dimensional computer programs developed as part of this work are based upon a detailed finite volume solution of the energy equation for the ground and ground loop. Real heat pump characteristics are entered into the program and used to model the heat pump performance. Thus these computer tools simulate the coupled performance of the ground loop and the heat pump. The price paid for the three-dimensional detail is the large computational times required with GEO3D. The computational times required for GEO2D are reasonable, a few minutes for a 20 year simulation. For a similar simulation, GEO3D takes days of computational time. Because of the small simulation times with GEO2D, a number of attractive features have been added to it. GEO2D has a user friendly interface where inputs and outputs are all handled with GUI (graphical user interface) screens. These GUI screens make the program exceptionally easy to use. To make the program even easier to use a number of standard input options for the most common GSHP situations are provided to the user. For the expert user, the option still exists to enter their own detailed information. To further help designers and GSHP customers make decisions about a GSHP heating and cooling system, cost estimates are made by the program. These cost estimates include a payback period graph to show the user where their GSHP system pays for itself. These GSHP simulation tools should be a benefit to the advancement of GSHP systems.

  1. Recovery Act: Finite Volume Based Computer Program for Ground Source Heat Pump Systems

    SciTech Connect (OSTI)

    James A Menart, Professor

    2013-02-22

    This report is a compilation of the work that has been done on the grant DE-EE0002805 entitled ���¢��������Finite Volume Based Computer Program for Ground Source Heat Pump Systems.���¢������� The goal of this project was to develop a detailed computer simulation tool for GSHP (ground source heat pump) heating and cooling systems. Two such tools were developed as part of this DOE (Department of Energy) grant; the first is a two-dimensional computer program called GEO2D and the second is a three-dimensional computer program called GEO3D. Both of these simulation tools provide an extensive array of results to the user. A unique aspect of both these simulation tools is the complete temperature profile information calculated and presented. Complete temperature profiles throughout the ground, casing, tube wall, and fluid are provided as a function of time. The fluid temperatures from and to the heat pump, as a function of time, are also provided. In addition to temperature information, detailed heat rate information at several locations as a function of time is determined. Heat rates between the heat pump and the building indoor environment, between the working fluid and the heat pump, and between the working fluid and the ground are computed. The heat rates between the ground and the working fluid are calculated as a function time and position along the ground loop. The heating and cooling loads of the building being fitted with a GSHP are determined with the computer program developed by DOE called ENERGYPLUS. Lastly COP (coefficient of performance) results as a function of time are provided. Both the two-dimensional and three-dimensional computer programs developed as part of this work are based upon a detailed finite volume solution of the energy equation for the ground and ground loop. Real heat pump characteristics are entered into the program and used to model the heat pump performance. Thus these computer tools simulate the coupled performance of the ground loop and the heat pump. The price paid for the three-dimensional detail is the large computational times required with GEO3D. The computational times required for GEO2D are reasonable, a few minutes for a 20 year simulation. For a similar simulation, GEO3D takes days of computational time. Because of the small simulation times with GEO2D, a number of attractive features have been added to it. GEO2D has a user friendly interface where inputs and outputs are all handled with GUI (graphical user interface) screens. These GUI screens make the program exceptionally easy to use. To make the program even easier to use a number of standard input options for the most common GSHP situations are provided to the user. For the expert user, the option still exists to enter their own detailed information. To further help designers and GSHP customers make decisions about a GSHP heating and cooling system, cost estimates are made by the program. These cost estimates include a payback period graph to show the user where their GSHP system pays for itself. These GSHP simulation tools should be a benefit to the advancement of GSHP system

  2. Geothermal Energy Resource Investigations, Chocolate Mountains...

    Open Energy Info (EERE)

    and identify Holocene structures, which are common conduits for upwelling geothermal fluids. Gravity and ground-based magnetics surveys were conducted during the summer of...

  3. Geothermal source potential and utilization for methane generation and alcohol production

    SciTech Connect (OSTI)

    Austin, J.C.

    1981-11-01

    A study was conducted to assess the technical and economic feasibility of integrating a geothermally heated anaerobic digester with a fuel alcohol plant and cattle feedlot. Thin stillage produced from the alcohol production process and manure collected from the cattle feedlot would be digested in anaerobic digesters to produce biogas, a mixture of methane and carbon dioxide, and residue. The energy requirements to maintain proper digester temperatures would be provided by geothermal water. The biogas produced in the digesters would be burned in a boiler to produce low-pressure steam which would be used in the alcohol production process. The alcohol plant would be sized so that the distiller's grains byproduct resulting from the alcohol production would be adequate to supply the daily cattle feed requirements. A portion of the digester residue would substitute for alfalfa hay in the cattle feedlot ration. The major design criterion for the integrated facilty was the production of adequate distiller's grain to supply the daily requirements of 1700 head of cattle. It was determined that, for a ration of 7 pounds of distiller's grain per head per day, a 1 million gpy alcohol facility would be required. An order-of-magnitude cost estimate was prepared for the proposed project, operating costs were calculated for a facility based on a corn feedstock, the economic feasibility of the proposed project was examined by calculating its simple payback, and an analysis was performed to examine the sensitivity of the project's economic viability to variations in feedstock costs and alcohol and distiller's grain prices.

  4. Case study for ARRA-funded ground-source heat pump (GSHP) demonstration at Oakland University

    SciTech Connect (OSTI)

    Im, Piljae; Liu, Xiaobing

    2015-09-01

    High initial costs and lack of public awareness of ground-source heat pump (GSHP) technology are the two major barriers preventing rapid deployment of this energy-saving technology in the United States. Under the American Recovery and Reinvestment Act (ARRA), 26 GSHP projects have been competitively selected and carried out to demonstrate the benefits of GSHP systems and innovative technologies for cost reduction and/or performance improvement. This paper highlights the findings of a case study of one of the ARRA-funded GSHP demonstration projects, a ground-source variable refrigerant flow (GS-VRF) system installed at the Human Health Building at Oakland University in Rochester, Michigan. This case study is based on the analysis of measured performance data, maintenance records, construction costs, and simulations of the energy consumption of conventional central heating, ventilation, and air-conditioning (HVAC) systems providing the same level of space conditioning as the demonstrated GS-VRF system. The evaluated performance metrics include the energy efficiency of the heat pump equipment and the overall GS-VRF system, pumping performance, energy savings, carbon emission reductions, and cost-effectiveness of the GS-VRF system compared with conventional HVAC systems. This case study also identified opportunities for reducing uncertainties in the performance evaluation, improving the operational efficiency, and reducing the installed cost of similar GSHP systems in the future.

  5. Geothermal Literature Review At International Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At International Geothermal Area, Italy (Ranalli & Rybach, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  6. Geothermal Literature Review At International Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At International Geothermal Area, Iceland (Ranalli & Rybach, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  7. 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...

  8. Semi-Empirical Characterization of Ground Motions Including Source, Path and Nonlinear Site Effects

    E-Print Network [OSTI]

    Seyhan, Emel

    2013-01-01

    Ground-Motion Prediction Models,” Earthquake Spectra, 26:4,Factors for Earthquake Ground-Motion Prediction,” Bull.simulations to NGA prediction equations, Earthquake Spectra.

  9. Contamination source review for Building E7995, Edgewood Area, Aberdeen Proving Ground, Maryland

    SciTech Connect (OSTI)

    Booher, M.N.; Miller, G.A.; Draugelis, A.K.; Glennon, M.A.; Rueda, J.; Zimmerman, R.E.

    1995-09-01

    The US Army Aberdeen Proving Ground (APG) commissioned Argonne National Laboratory (ANL) to conduct a contamination source review to identify and define areas of toxic or hazardous contaminants and to assess the physical condition and accessibility of APG buildings. The information obtained from the review may be used to assist the US Army in planning for the future use or disposition, of the buildings. The source contamination review consisted of the following tasks: historical records search, physical inspection, photographic documentation, geophysical investigation, investigation of potential hazardous materials facilities (HMFs), and review of available records regarding underground storage tanks. This report provides the results of the contamination source review for Building E7995. any of the APG facilities constructed between 1917 and the 1960s are no longer used because of obsolescence and their poor state of repair. Because many of these buildings were used for research, development, testing, and/or pilot-scale production of chemical warfare agents and other military substances, the potential exists for portions of the buildings to be contaminated with these substances, their degradation products, and other laboratory or industrial chemicals. These buildings, and associated structures or appurtenances, may contribute to environmental concerns at APG.

  10. PARAMETRIC STUDY OF GROUND SOURCE HEAT PUMP SYSTEM FOR HOT AND HUMID CLMATE

    SciTech Connect (OSTI)

    Jiang Zhu; Yong X. Tao

    2011-11-01

    The U-tube sizes and varied thermal conductivity with different grout materials are studied based on the benchmark residential building in Hot-humid Pensacola, Florida. In this study, the benchmark building is metered and the data is used to validate the simulation model. And a list of comparative simulation cases with varied parameter value are simulated to study the importance of pipe size and grout to the ground source heat pump energy consumption. The simulation software TRNSYS [1] is employed to fulfill this task. The results show the preliminary energy saving based on varied parameters. Future work needs to be conducted for the cost analysis, include the installation cost from contractor and materials cost.

  11. Direct application of geothermal energy

    SciTech Connect (OSTI)

    Reistad, G.M.

    1980-01-01

    An overall treatment of direct geothermal applications is presented with an emphasis on the above-ground engineering. The types of geothermal resources and their general extent in the US are described. The potential market that may be served with geothermal energy is considered briefly. The evaluation considerations, special design aspects, and application approaches for geothermal energy use in each of the applications are considered. The present applications in the US are summarized and a bibliography of recent studies and applications is provided. (MHR)

  12. Evidence for a Crustal Heat Source for Low-Temperature Geothermal...

    Open Energy Info (EERE)

    geothermalsystems in the Central Alaskan Hot Springs Belt (CAHSB) areheated by a crustal heat source. The overall rate of circulation inCAHSB systems appears to be low, with...

  13. Contamination source review for Building E1489, Edgewood Area, Aberdeen Proving Ground, Maryland

    SciTech Connect (OSTI)

    Billmark, K.A.; Hayes, D.C.; Draugelis, A.K.

    1995-09-01

    This report was prepared by Argonne National Laboratory (ANL) to document the results of a contamination source review of Building E1489 at the Aberdeen Proving Ground (APG) in Maryland. This report may be used to assist the U.S. Army-in planning for the future use or disposition of this building. The review included a historical records search, physical inspection, photographic documentation, and geophysical investigation. The field investigations were performed in 1994-1995. Building E1489 located in J-Field on the Gunpowder Peninsula in APG`s Edgewood Area housed a power generator that supplied electricity to a nearby observation tower. Building E1489 and the generator were abandoned in 1974, demolished by APG personnel and removed from real estate records. A physical inspection and photographic documentation of Building E1489 were completed by ANL staff during November 1994. In 1994, ANL staff conducted geophysical surveys in the immediate vicinity of Building E1489 by using several nonintrusive methods. Survey results suggest the presence of some underground objects near Building E1489, but they do not provide conclusive evidence of the source of geophysical anomalies observed during the survey. No air monitoring was conducted at the site, and no information on underground storage tanks associated with Building E1489 was available.

  14. Field and Laboratory Study of a Ground-Coupled Water Source Heat Pump with an Integral Enthalpy Exchange System for Classrooms 

    E-Print Network [OSTI]

    Domitrovic, R.; Hayzen, G. J.; Johnson, W. S.; Chen, F. C.

    2002-01-01

    water-source heat pump, coupled with a geothermal water loop and incorporating a forced fresh-air enthalpy exchange system was installed in a typical middle school classroom in Oak Ridge, Tennessee. This project is a joint effort among Oak Ridge School...

  15. Ground Gravity Survey At Lake City Hot Springs Area (Warpinski...

    Open Energy Info (EERE)

    Ground Gravity Survey At Lake City Hot Springs Area (Warpinski, Et Al., 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground Gravity...

  16. Ground Gravity Survey At Under Steamboat Springs Area (Warpinski...

    Open Energy Info (EERE)

    Ground Gravity Survey At Under Steamboat Springs Area (Warpinski, Et Al., 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Ground Gravity...

  17. Low-temperature geothermal resources of Washington

    SciTech Connect (OSTI)

    Schuster, J.E. [Washington State Dept. of Natural Resources, Olympia, WA (United States). Div. of Geology and Earth Resources] [Washington State Dept. of Natural Resources, Olympia, WA (United States). Div. of Geology and Earth Resources; Bloomquist, R.G. [Washington State Energy Office, Olympia, WA (United States)] [Washington State Energy Office, Olympia, WA (United States)

    1994-06-01

    This report presents information on the location, physical characteristics, and water chemistry of low-temperature geothermal resources in Washington. The database includes 941 thermal (>20C or 68F) wells, 34 thermal springs, lakes, and fumaroles, and 238 chemical analyses. Most thermal springs occur in the Cascade Range, and many are associated with stratovolcanoes. In contrast, 97 percent of thermal wells are located in the Columbia Basin of southeastern Washington. Some 83.5 percent are located in Adams, Benton, Franklin, Grant, Walla Walla, and Yakima Counties. Yakima County, with 259 thermal wells, has the most. Thermal wells do not seem to owe their origin to local sources of heat, such as cooling magma in the Earth`s upper crust, but to moderate to deep circulation of ground water in extensive aquifers of the Columbia River Basalt Group and interflow sedimentary deposits, under the influence of a moderately elevated (41C/km) average geothermal gradient.

  18. Geothermal Heat Pump Basics

    Broader source: Energy.gov [DOE]

    Geothermal heat pumps use the constant temperature of the earth as an exchange medium for heat. Although many parts of the country experience seasonal temperature extremes—from scorching heat in the summer to sub-zero cold in the winter—the ground a few feet below the earth's surface remains at a relatively constant temperature.

  19. THE ROLE OF REMOTE SENSING IN GEOTHERMAL EXPLORATION

    E-Print Network [OSTI]

    at regional scale using earthquakes: #12;Drilling Success Rate ­ reducing risk and cost of a geothermal' Source: WWF ring of fire #12;NK YOU Source: PGE #12;Source: PGE #12;GEOTHERMAL PROJECT RISK VERSUS COST 9 Can better exploration reduce risk and decrease cost here Source: ESMAP geothermal handbook, worldbank

  20. Impacts of Soil and Pipe Thermal Conductivity on Performance of Horizontal Pipe in a Ground-source Heat Pump 

    E-Print Network [OSTI]

    Song, Y.; Yao, Y.; Na, W.

    2006-01-01

    In this paper the composition and thermal property of soil are discussed. The main factors that impact the soil thermal conductivity and several commonly-used pipe materials are studied. A model of heat exchanger with horizontal pipes of ground-source...

  1. Analysis of Selection of Single or Double U-bend Pipes in a Ground Source Heat Pump System 

    E-Print Network [OSTI]

    Shu, H.; Duanmu, L.; Hua, R.

    2006-01-01

    The ground source heat pump (GSHP) system is widely used because of its energy-saving and environmental-friendly characteristics. The buried pipes heat exchangers play an important role in the whole GSHP system design. However, in most cases, single...

  2. Identifying Potential Land Use-derived Solute Sources to Stream Baseflow Using Ground Water Models and GIS

    E-Print Network [OSTI]

    to assess the impact of different baseflow solute contributions to surface water chemistry. Numerous field systems, locations of oil brine fields and high- density human populations) likely exist. Impacts of otherBoutt 1 Identifying Potential Land Use-derived Solute Sources to Stream Baseflow Using Ground Water

  3. In-Depth Look at Ground Source Heat Pumps and Other Electric Loads in Two GreenMax Homes

    SciTech Connect (OSTI)

    Puttagunta, S.; Shapiro, C.

    2012-04-01

    CARB partnered with WPPI Energy to answer key research questions on in-field performance of ground-source heat pumps and LAMELs through extensive field monitoring at two WPPI GreenMax demonstration homes in Wisconsin. These two test home evaluations provided valuable data on the true in-field performance of various building mechanical systems and lighting, appliances, and miscellaneous loads (LAMELs).

  4. Update on maintenance and service costs of commercial building ground-source heat pump systems

    SciTech Connect (OSTI)

    Cane, D.; Garnet, J.M.

    2000-07-01

    An earlier paper showed that commercial ground-source heat pump systems have significantly lower service and maintenance costs than alternative HVAC systems. This paper expands on those results by adding 13 more buildings to the original 25 sites and by comparing the results to the latest ASHRAE survey of HVAC maintenance costs. Data from the 38 sites are presented here including total (scheduled and unscheduled) maintenance costs in cents per square foot per year for base cost, in-house, and contractor-provided maintenance. Because some of the new sites had maintenance costs that were much higher than the industry norm, the resulting data are not normally distributed. Analysis (O'Hara Hines 1998) indicated that a log-normal distribution is a better fit; thus, the data are analyzed and presented here as log-normal. The log-mean annual total maintenance costs for the most recent year of the survey ranged from 6.07 cents per square foot to 8.37 cents per square foot for base cost and contractor-provided maintenance, respectively.

  5. Hybrid Ground-Source Heat Pump Installations: Experiences, Improvements, and Tools

    SciTech Connect (OSTI)

    Scott Hackel; Amanda Pertzborn

    2011-06-30

    One innovation to ground-source heat pump (GSHP, or GHP) systems is the hybrid GSHP (HyGSHP) system, which can dramatically decrease the first cost of GSHP systems by using conventional technology (such as a cooling tower or a boiler) to meet a portion of the peak heating or cooling load. This work uses three case studies (two cooling-dominated, one heating-dominated) to demonstrate the performance of the hybrid approach. Three buildings were studied for a year; the measured data was used to validate models of each system. The models were used to analyze further improvements to the hybrid approach, and establish that this approach has positive impacts, both economically and environmentally. Lessons learned by those who design and operate the systems are also documented, including discussions of equipment sizing, pump operation, and cooling tower control. Finally, the measured data sets and models that were created during this work are described; these materials have been made freely available for further study of hybrid systems.

  6. Contamination source review for Building E3163, Edgewood Area, Aberdeen Proving Ground, Maryland

    SciTech Connect (OSTI)

    Draugelis, A.K.; Muir-Ploense, K.L.; Glennon, M.A.; Zimmerman, R.E.

    1995-09-01

    This report was prepared by Argonne National Laboratory (ANL) to document the results of a contamination source review for Building E3163 at the Aberdeen Proving Ground (APG) in Maryland. This report may be used to assist the US Army in planning for the future use or disposition of this building. The review included a historical records search, physical inspection, photographic documentation, and geophysical investigation. The field investigations were performed by ANL during 1994 and 1995. Building E3163 (APG designation) is part of the Medical Research Laboratories E3160 Complex. This research laboratory complex is located west of Kings Creek, east of the airfield and Ricketts Point Road, and south of Kings Creek Road in the Edgewood Area of APG. The original structures in the E3160 Complex were constructed during World War II. The complex was originally used as a medical research laboratory. Much of the research involved wound assessment. Building E3163, constructed in 1946, was used for toxicological studies on animals until 1965. All agent testing was done using laboratory-scale quantities of agents. All operational data were destroyed; total quantities and types of agents used during the testing are unknown. No experimentation has been conducted in the building since 1965. However, the building was used as overflow office space until the late 1980s. Since that time, the building has been unoccupied.

  7. development Not Available 15 GEOTHERMAL ENERGY; TONGONAN GEOTHERMAL...

    Office of Scientific and Technical Information (OSTI)

    field Leyte, Philippines. Report on exploration and development Not Available 15 GEOTHERMAL ENERGY; TONGONAN GEOTHERMAL FIELD; GEOTHERMAL EXPLORATION; GEOTHERMAL POWER...

  8. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Farhar, 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  9. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Rafferty, 1997) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  10. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Witcher, 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  11. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Sammel, 1978) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  12. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Lienau, 1990) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  13. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Callender, 1981) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  14. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Grant, 1978) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  15. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Smith, 1978) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  16. Supply of geothermal power from hydrothermal sources: A study of the cost of power in 20 and 40 years

    SciTech Connect (OSTI)

    Petty, S. (Petty (Susan) Consulting, Solano Beach, CA (United States)); Livesay, B.J. (Livesay Consultants, Inc., Encinitas, CA (United States)); Long, W.P. (Carlin Gold Co., Inc., Grass Valley, CA (United States)); Geyer, J. (Geyer (John) and Associates, Vancouver, WA (United States))

    1992-11-01

    This study develops estimates for the amount of hydrothermal geothermal power that could be on line in 20 and 40 years. This study was intended to represent a snapshot'' in 20 and 40 years of the hydrothermal energy available for electric power production should a market exist for this power. This does not represent the total or maximum amount of hydrothermal power, but is instead an attempt to estimate the rate at which power could be on line constrained by the exploration, development and support infrastructure available to the geothermal industry, but not constrained by the potential market for power.

  17. PERFORMANCE ANALYSIS OF A RESIDENTIAL GROUND SOURCE HEAT PUMP SYSTEM WITH ANTIFREEZE SOLUTION

    E-Print Network [OSTI]

    freezing in the heat pump. The antifreeze mixture type and concentration has a number of implications for the design and performance of the system. These include the required ground loop heat exchanger length, and the first cost of the system. For example, the required ground loop heat exchanger length and first cost

  18. National Geothermal Data System (NGDS)

    DOE Data Explorer [Office of Scientific and Technical Information (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.

  19. The Future of Geothermal Energy

    SciTech Connect (OSTI)

    Kubik, Michelle

    2006-01-01

    A comprehensive assessment of enhanced, or engineered, geothermal systems was carried out by an 18-member panel assembled by the Massachusetts Institute of Technology (MIT) to evaluate the potential of geothermal energy becoming a major energy source for the United States.

  20. GEOTHERMAL ENERGY; 59 BASIC BIOLOGICAL SCIENCES; BRINES; DETOXIFICATIO...

    Office of Scientific and Technical Information (OSTI)

    PROCESSING; BACTERIA; BIOCHEMISTRY; BIOREACTORS; BIOTECHNOLOGY; GEOCHEMISTRY; GEOTHERMAL ENERGY; METALS; SLUDGES; TOXIC MATERIALS; CHEMISTRY; ELEMENTS; ENERGY; ENERGY SOURCES;...

  1. Stanford Geothermal Workshop - Geothermal Technologies Office...

    Broader source: Energy.gov (indexed) [DOE]

    by Geothermal Technologies Director Doug Hollett at the Stanford Geothermal Workshop on February 11-13, 2013. stanford2013hollett.pdf More Documents & Publications Geothermal...

  2. Stanford Geothermal Workshop - Geothermal Technologies Office...

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

    Geothermal Technologies Program Annual Peer Review Presentation By Doug Hollett Iceland Geothermal Conference 2013 - Geothermal Policies and Impacts in the U.S. Fiscal Year...

  3. The citation for this paper is: Spitler, J.D., X. Liu, S.J. Rees, C. Yavuzturk. 2005. Simulation and Optimization of Ground Source Heat

    E-Print Network [OSTI]

    heat pump, standing column well, and sev- eral types of supplemental heat rejecters used in hybrid GSHP and Optimization of Ground Source Heat Pump Systems. 8th International Energy Agency Heat Pump Conference. Las Vegas. May 30-June 2. 1 #12;SIMULATION AND OPTIMIZATION OF GROUND SOURCE HEAT PUMP SYSTEMS J.D. Spitler

  4. A pre-feasibility study to assess the potential of Open Loop Ground Source Heat to heat and cool the proposed Earth Science Systems Building

    E-Print Network [OSTI]

    A pre-feasibility study to assess the potential of Open Loop Ground Source Heat to heat and cool the proposed Earth Science Systems Building at the University of British Columbia Abha Parajulee Kim Smet............................................................1 1.2. History of Ground Source Heat Pump Systems................................................3 1

  5. Cedarville School District Retrofit of Heating and Cooling Systems with Geothermal Heat Pumpsand Ground Source Water Loops

    Broader source: Energy.gov [DOE]

    Project objectives: Improve the indoor air quality and lower the cost of cooling and heating the buildings that make up the campus of Cedarville High School and Middle School.; Provide jobs; and reduce requirements of funds for the capital budget of the School District; and thus give relief to taxpayers in this rural region during a period of economic recession.

  6. Surface Indicators of Geothermal Activity at Salt Wells, Nevada...

    Open Energy Info (EERE)

    Surface Indicators of Geothermal Activity at Salt Wells, Nevada, USA, Including Warm Ground, Borate Deposits, and Siliceous Alteration Jump to: navigation, search OpenEI Reference...

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

    SciTech Connect (OSTI)

    Anderson, Arlene; Blackwell, David; Chickering, Cathy; Boyd, Toni; Horne, Roland; MacKenzie, Matthew; Moore, Joseph; Nickull, Duane; Richard, Stephen; Shevenell, Lisa A.

    2013-01-01

    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.

  8. MEASURED SPACE CONDITIONING PERFORMANCE OFA VERTICAL-BORE GROUND SOURCE HEAT PUMP (GSHP) OVER TWELVE MONTHS UNDER SIMULATED OCCUPANCY LOADS

    SciTech Connect (OSTI)

    Ally, Moonis Raza [ORNL; Munk, Jeffrey D [ORNL; Baxter, Van D [ORNL; Gehl, Anthony C [ORNL

    2014-01-01

    This paper presents monthly performance metrics of a 7.56 kW (2.16 ton) GSHP serving the space conditioning loads of a 251m2 (2700ft2) residential home with a phase change material in its envelope, and a single vertical-bore 94.5m (310 ft) ground loop. The same ground loop also serviced a ground source heat pump water heater. Envelope characteristics are discussed briefly in the context of reducing thermal losses. Data on entering water temperatures, energy extracted from the ground, energy delivered/removed, compressor electricity use, COP, GSHP run times (low and high compressor stages), and the impact of fan and pump energy consumption on efficiency are presented for each month. Both practical as well as research and development issues are discussed. The findings suggest that GSHPs represent a practical technology option to reduce source energy reduction and greenhouse emissions under the IECC 2012 Standard, as well as the European Union (EU) 2020 target of generating over 25% of heat consumed in the EU from renewable energy.

  9. Magnetotellurics At Dixie Valley Geothermal Area (Wannamaker...

    Open Energy Info (EERE)

    Geothermal Area, Nevada- Structural Controls, Hydrothermal Alteration and Deep Fluid Sources Additional References Retrieved from "http:en.openei.orgwindex.php?titleMagne...

  10. Utilization of geothermal energy in the mining and processing of tungsten ore. Final report

    SciTech Connect (OSTI)

    Erickson, M.V.; Lacy, S.B.; Lowe, G.D.; Nussbaum, A.M.; Walter, K.M.; Willens, C.A.

    1981-01-01

    The engineering, economic, and environmental feasibility of the use of low and moderate temperature geothermal heat in the mining and processing of tungsten ore is explored. The following are covered: general engineering evaluation, design of a geothermal energy system, economics, the geothermal resource, the institutional barriers assessment, environmental factors, an alternate geothermal energy source, and alternates to geothermal development. (MHR)

  11. Ground?Source Heat Pumps: Overview of Market Status, Barriers to Adoption, and Options for Overcoming Barriers

    SciTech Connect (OSTI)

    Navigant Consulting, Inc.

    2011-11-21

    February 2009 final report submitted to DOE by Navigant Consulting, Inc. This report summarizes the status of ground?source heat pump (GSHP) technology and market penetration globally, estimates the energy saving potential of GSHPs in the U.S., identifies key market barriers that are inhibiting wider market adoption of GSHPs, and recommends initiatives that can be implemented or facilitated by the DOE to accelerate market adoption.

  12. Measured Space Conditioning and Water Heating Performance of a Ground-Source Integrated Heat Pump in a Residential Application

    SciTech Connect (OSTI)

    Munk, Jeffrey D [ORNL] [ORNL; Ally, Moonis Raza [ORNL] [ORNL; Baxter, Van D [ORNL] [ORNL; Gehl, Anthony C [ORNL] [ORNL

    2014-01-01

    In an effort to reduce residential building energy consumption, a ground-source integrated heat pump was developed to meet a home s entire space conditioning and water heating needs, while providing 50% energy savings relative to a baseline suite of minimum efficiency equipment. A prototype 7.0 kW system was installed in a 344 m2 research house with simulated occupancy in Oak Ridge, TN. The equipment was monitored from June 2012 through January 2013.

  13. An In-Depth Look at Ground Source Heat Pumps and Other Electric Loads in Two GreenMax Homes

    SciTech Connect (OSTI)

    Puttagunta, Srikanth; Shapiro, Carl

    2012-04-01

    Building America research team Consortium for Advanced Residential Buildings (CARB) partnered with WPPI Energy to answer key research questions on in-field performance of ground-source heat pumps and lighting, appliance, and miscellaneous loads (LAMELs) through extensive field monitoring at two WPPI GreenMax demonstration homes in Wisconsin. These two test home evaluations provided valuable data on the true in-field performance of various building mechanical systems and LAMELs.

  14. Geothermal Energy Summary

    SciTech Connect (OSTI)

    J. L. Renner

    2007-08-01

    Following is complete draft.Geothermal Summary for AAPG Explorer J. L. Renner, Idaho National Laboratory Geothermal energy is used to produce electricity in 24 countries. The United States has the largest capacity (2,544 MWe) followed by Philippines (1,931 MWe), Mexico (953 MWe), Indonesia (797 MWe), and Italy (791 MWe) (Bertani, 2005). When Chevron Corporation purchased Unocal Corporation they became the leading producer of geothermal energy worldwide with projects in Indonesia and the Philippines. The U. S. geothermal industry is booming thanks to increasing energy prices, renewable portfolio standards, and a production tax credit. California (2,244 MWe) is the leading producer, followed by Nevada (243 MWe), Utah (26 MWe) and Hawaii (30 MWe) and Alaska (0.4 MWe) (Bertani, 2005). Alaska joined the producing states with two 0.4 KWe power plants placed on line at Chena Hot Springs during 2006. The plant uses 30 liters per second of 75°C water from shallow wells. Power production is assisted by the availability of gravity fed, 7°C cooling water (http://www.yourownpower.com/) A 13 MWe binary power plant is expected to begin production in the fall of 2007 at Raft River in southeastern Idaho. Idaho also is a leader in direct use of geothermal energy with the state capital building and several other state and Boise City buildings as well as commercial and residential space heated using fluids from several, interconnected geothermal systems. The Energy Policy Act of 2005 modified leasing provisions and royalty rates for both geothermal electrical production and direct use. Pursuant to the legislation the Bureau of Land management and Minerals Management Service published final regulations for continued geothermal leasing, operations and royalty collection in the Federal Register (Vol. 72, No. 84 Wednesday May 2, 2007, BLM p. 24358-24446, MMS p. 24448-24469). Existing U. S. plants focus on high-grade geothermal systems located in the west. However, interest in non-traditional geothermal development is increasing. A comprehensive new MIT-led study of the potential for geothermal energy within the United States predicts that mining the huge amounts of stored thermal energy in the Earth’s crust not associated with hydrothermal systems, could supply a substantial portion of U.S. electricity with minimal environmental impact (Tester, et al., 2006, available at http://geothermal.inl.gov). There is also renewed interest in geothermal production from other non-traditional sources such as the overpressured zones in the Gulf Coast and warm water co-produced with oil and gas. Ormat Technologies, Inc., a major geothermal company, recently acquired geothermal leases in the offshore overpressured zone of Texas. Ormat and the Rocky Mountain Oilfield Testing Center recently announced plans to jointly produce geothermal power from co-produced water from the Teapot Dome oilfield (Casper Star-Tribune, March 2, 2007). RMOTC estimates that 300 KWe capacity is available from the 40,000 BWPD of 88°C water associated with oil production from the Tensleep Sandstone (Milliken, 2007). The U. S. Department of Energy is seeking industry partners to develop electrical generation at other operating oil and gas fields (for more information see: https://e-center.doe.gov/iips/faopor.nsf/UNID/50D3734745055A73852572CA006665B1?OpenDocument). Several web sites offer periodically updated information related to the geothermal industry and th

  15. Foundation heat exchangers for residential ground source heat pump systems Numerical modeling and experimental validation

    SciTech Connect (OSTI)

    Xing, Lu [Oklahoma State University; Cullin, James [Oklahoma State University; Spitler, Jeffery [Oklahoma State University; Im, Piljae [ORNL; Fisher, Daniel [Oklahoma State University

    2011-01-01

    A new type of ground heat exchanger that utilizes the excavation often made for basements or foundations has been proposed as an alternative to conventional ground heat exchangers. This article describes a numerical model that can be used to size these foundation heat exchanger (FHX) systems. The numerical model is a two-dimensional finite-volume model that considers a wide variety of factors, such as soil freezing and evapotranspiration. The FHX numerical model is validated with one year of experimental data collected at an experimental house located near Oak Ridge, Tennessee. The model shows good agreement with the experimental data-heat pump entering fluid temperatures typically within 1 C (1.8 F) - with minor discrepancies due to approximations, such as constant moisture content throughout the year, uniform evapotranspiration over the seasons, and lack of ground shading in the model.

  16. Geothermal Case Studies

    SciTech Connect (OSTI)

    Young, Katherine

    2014-09-30

    The US Geological Survey (USGS) resource assessment (Williams et al., 2009) outlined a mean 30GWe of undiscovered hydrothermal resource in the western US. One goal of the Geothermal Technologies Office (GTO) is to accelerate the development of this undiscovered resource. The Geothermal Technologies Program (GTP) Blue Ribbon Panel (GTO, 2011) recommended that DOE focus efforts on helping industry identify hidden geothermal resources to increase geothermal capacity in the near term. Increased exploration activity will produce more prospects, more discoveries, and more readily developable resources. Detailed exploration case studies akin to those found in oil and gas (e.g. Beaumont, et al, 1990) will give operators a single point of information to gather clean, unbiased information on which to build geothermal drilling prospects. To support this effort, the National Renewable Energy laboratory (NREL) has been working with the Department of Energy (DOE) to develop a template for geothermal case studies on the Geothermal Gateway on OpenEI. In fiscal year 2013, the template was developed and tested with two case studies: Raft River Geothermal Area (http://en.openei.org/wiki/Raft_River_Geothermal_Area) and Coso Geothermal Area (http://en.openei.org/wiki/Coso_Geothermal_Area). In fiscal year 2014, ten additional case studies were completed, and additional features were added to the template to allow for more data and the direct citations of data. The template allows for: Data - a variety of data can be collected for each area, including power production information, well field information, geologic information, reservoir information, and geochemistry information. Narratives ? general (e.g. area overview, history and infrastructure), technical (e.g. exploration history, well field description, R&D activities) and geologic narratives (e.g. area geology, hydrothermal system, heat source, geochemistry.) Exploration Activity Catalog - catalog of exploration activities conducted in the area (with dates and references.) NEPA Analysis ? a query of NEPA analyses conducted in the area (that have been catalogued in the OpenEI NEPA database.) In fiscal year 2015, NREL is working with universities to populate additional case studies on OpenEI. The goal is to provide a large enough dataset to start conducting analyses of exploration programs to identify correlations between successful exploration plans for areas with similar geologic occurrence models.

  17. Comparison of energy efficiency between variable refrigerant flow systems and ground source heat pump systems

    E-Print Network [OSTI]

    Hong, Tainzhen

    2010-01-01

    GSHP system is more energy efficient than the air-source VRFGSHP system is more energy efficient than the air-source VRVintended to be as energy efficient as required by current

  18. Geothermal Basics

    Broader source: Energy.gov [DOE]

    Geothermal energy is thermal energy generated and stored in the Earth. Geothermal energy can manifest on the surface of the Earth, or near the surface of the Earth, where humankind may harness it to serve our energy needs. Geothermal resources are reservoirs of hot water that exist at varying temperatures and depths below the Earth's surface. Wells can be drilled into these underground reservoirs to tap steam and very hot water that can be brought to the surface for a variety of uses.

  19. Energy 101: Geothermal Energy

    ScienceCinema (OSTI)

    None

    2014-06-23

    See how we can generate clean, renewable energy from hot water sources deep beneath the Earth's surface. The video highlights the basic principles at work in geothermal energy production, and illustrates three different ways the Earth's heat can be converted into electricity.

  20. Energy 101: Geothermal Energy

    SciTech Connect (OSTI)

    2014-05-27

    See how we can generate clean, renewable energy from hot water sources deep beneath the Earth's surface. The video highlights the basic principles at work in geothermal energy production, and illustrates three different ways the Earth's heat can be converted into electricity.

  1. First Google.Org-Funded Geothermal Mapping Report Confirms Vast...

    Office of Environmental Management (EM)

    Google.Org-Funded Geothermal Mapping Report Confirms Vast Coast-to-Coast Clean Energy Source First Google.Org-Funded Geothermal Mapping Report Confirms Vast Coast-to-Coast Clean...

  2. Technical Feasibility Study for Deployment of Ground-Source Heat Pump Systems: Portsmouth Naval Shipyard -- Kittery, Maine

    SciTech Connect (OSTI)

    Hillesheim, M.; Mosey, G.

    2014-11-01

    The U.S. Environmental Protection Agency (EPA) Office of Solid Waste and Emergency Response, in accordance with the RE-Powering America's Lands initiative, engaged the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) to conduct feasibility studies to assess the viability of developing renewable energy generating facilities on contaminated sites. Portsmouth Naval Shipyard (PNSY) is a United States Navy facility located on a series of conjoined islands in the Piscataqua River between Kittery, ME and Portsmouth, NH. EPA engaged NREL to conduct a study to determine technical feasibility of deploying ground-source heat pump systems to help PNSY achieve energy reduction goals.

  3. Geothermal Energy

    SciTech Connect (OSTI)

    Steele, B.C.; Pichiarella, L.S. [eds.; Kane, L.S.; Henline, D.M.

    1995-01-01

    Geothermal Energy (GET) announces on a bimonthly basis the current worldwide information available on the technologies required for economic recovery of geothermal energy and its use as direct heat or for electric power production. This publication contains the abstracts of DOE reports, journal articles, conference papers, patents, theses, and monographs added to the Energy Science and Technology Database during the past two months.

  4. Integrated Heat Pump (IHP) System Development - Air-Source IHP Control Strategy and Specifications and Ground-Source IHP Conceptual Design

    SciTech Connect (OSTI)

    Murphy, Richard W [ORNL; Rice, C Keith [ORNL; Baxter, Van D [ORNL

    2007-05-01

    The integrated heat pump (IHP), as one appliance, can provide space cooling, heating, ventilation, and dehumidification while maintaining comfort and meeting domestic water heating needs in near-zero-energy home (NZEH) applications. In FY 2006 Oak Ridge National Laboratory (ORNL) completed development of a control strategy and system specification for an air-source IHP. The conceptual design of a ground-source IHP was also completed. Testing and analysis confirm the potential of both IHP concepts to meet NZEH energy services needs while consuming 50% less energy than a suite of equipment that meets current minimum efficiency requirements. This report is in fulfillment of an FY06 DOE Building Technologies (BT) Joule Milestone.

  5. Methodology for the evaluation of a 4000-home geothermal heat pump retrofit at Fort Polk, Louisiana

    SciTech Connect (OSTI)

    Hughes, P.J.; Shonder, J.A.; White, D.L.; Huang, H.L.

    1998-03-01

    The US Army and a private energy service company are developing a comprehensive energy efficiency project to upgrade the family housing at Fort Polk, Louisiana. The project includes converting the space conditioning systems of more than 4,000 housing units to geothermal (or ground-source) heat pumps (GHPs). This interim report describes the methodology of the evaluation associated with this project, including the field monitoring that has been conducted at the base.

  6. New Mexico HB 201 (2012) An Act Relating to Geothermal Resources...

    Open Energy Info (EERE)

    New Mexico HB 201 (2012) An Act Relating to Geothermal Resources; Providing for ground water to qualify as a geothermal resource Jump to: navigation, search OpenEI Reference...

  7. Exploration of the El Hoyo-Monte Galan Geothermal Concession. Final report

    SciTech Connect (OSTI)

    NONE

    1997-12-01

    In January 1996 Trans-Pacific Geothermal Corporation (TGC) was granted a geothermal concession of 114 square kilometers from the Instituto Nicaragueense de Energie (INE) for the purpose of developing between 50 and 150 MWe of geothermal electrical generating capacity. The Concession Agreement required TGC to perform geological, geophysical, and geochemical studies as part of the development program. TGC commenced the geotechnical studies in January 1996 with a comprehensive review of all existing data and surveys. Based on this review, TGC formulated an exploration plan and executed that plan commencing in April, 1996. The ground magnetic (GM), self potential (SP), magnetotelluric/controlled source audio magnetotelluric (MT/CSAMT) and one-meter temperature surveys, data integration, and synthesis of a hydrogeologic model were performed. The purpose of this report is to present a compilation of all data gathered from the geophysical exploration program and to provide an integrated interpretation of that data.

  8. Overview of the Geothermal Energy Program Review X: Geothermal Energy and the Utility Market - The Opportunities and Challenges for Expanding Geothermal Energy in a Competitive Supply Market

    SciTech Connect (OSTI)

    Mock, John E.; Budraja, Vikram; Jaros, Richard; Yamaguchi, Tsutomu; Hinrichs, Thomas C.

    1992-01-01

    This overview at the Geothermal Program Review X: Geothermal Energy and the Utility Market consisted of five presentations: ''Technology Advancements to Support Growth in Geothermal Power Sales in a Dynamic Utility Market'' by John E. Mock; ''Geothermal Energy Market in Southern California: Past, Present and Future'' by Vikram Budraja; ''Taking the High Ground: Geothermal's Place in the Revolving Energy Market'' by Richard Jaros; ''Recent Developments in Japan's Hot Dry Rock Program'' by Tsutomu Yamaguchi; and ''Options in the Eleventh Year for Interim Standard Offer Number Four Contracts'' by Thomas C. Hinrichs.

  9. Geothermal Small Business Workbook [Geothermal Outreach and Project Financing

    SciTech Connect (OSTI)

    Elizabeth Battocletti

    2003-05-01

    Small businesses are the cornerstone of the American economy. Over 22 million small businesses account for approximately 99% of employers, employ about half of the private sector workforce, and are responsible for about two-thirds of net new jobs. Many small businesses fared better than the Fortune 500 in 2001. Non-farm proprietors income rose 2.4% in 2001 while corporate profits declined 7.2%. Yet not all is rosy for small businesses, particularly new ones. One-third close within two years of opening. From 1989 to 1992, almost half closed within four years; only 39.5% were still open after six years. Why do some new businesses thrive and some fail? What helps a new business succeed? Industry knowledge, business and financial planning, and good management. Small geothermal businesses are no different. Low- and medium-temperature geothermal resources exist throughout the western United States, the majority not yet tapped. A recent survey of ten western states identified more than 9,000 thermal wells and springs, over 900 low- to moderate-temperature geothermal resource areas, and hundreds of direct-use sites. Many opportunities exist for geothermal entrepreneurs to develop many of these sites into thriving small businesses. The ''Geothermal Small Business Workbook'' (''Workbook'') was written to give geothermal entrepreneurs, small businesses, and developers the tools they need to understand geothermal applications--both direct use and small-scale power generation--and to write a business and financing plan. The Workbook will: Provide background, market, and regulatory data for direct use and small-scale (< 1 megawatt) power generation geothermal projects; Refer you to several sources of useful information including owners of existing geothermal businesses, trade associations, and other organizations; Break down the complicated and sometimes tedious process of writing a business plan into five easy steps; Lead you--the geothermal entrepreneur, small company, or project developer--step-by-step through the process needed to structure a business and financing plan for a small geothermal project; and Help you develop a financing plan that can be adapted and taken to potential financing sources. The Workbook will not: Substitute for financial advice; Overcome the high exploration, development, and financing costs associated with smaller geothermal projects; Remedy the lack of financing for the exploration stage of a geothermal project; or Solve financing problems that are not related to the economic soundness of your project or are caused by things outside of your control.

  10. National Geothermal Data System: Case Studies on Exploration and Development of Potential Geothermal Sites Through Distributed Data Sharing

    SciTech Connect (OSTI)

    Anderson, Arlene; Allison, Lee; Richard, Steve; Caudill-Daugherty, Christy; Patten, Kim

    2014-09-29

    The NGDS released version 1 of the system on April 30, 2014 using the US Geoscience Information Network (USGIN) as its data integration platform. NGDS supports the 2013 Open Data Policy, and as such, the launch was featured at the 2014 Energy Datapalooza. Currently, the NGDS features a comprehensive user interface for searching and accessing nearly 41,000 documents and more than 9 million data points shared by scores of data providers across the U.S. The NGDS supports distributed data sharing, permitting the data owners to maintain the raw data that is made available to the consumer. Researchers and industry have been utilizing the NGDS as a mechanism for promoting geothermal development across the country, from hydrothermal to ground source heat pump applications. Case studies in geothermal research and exploration from across the country are highlighted.

  11. National Geothermal Summit

    Broader source: Energy.gov [DOE]

    The Geothermal Energy Association hosts its annual National Geothermal Summit in Reno, Nevada, June 3-4, 2015.

  12. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Stone, Et Al., 1977) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  13. Geothermal Literature Review At Roosevelt Hot Springs Geothermal...

    Open Energy Info (EERE)

    Geothermal Literature Review At Roosevelt Hot Springs Geothermal Area (Faulder, 1991) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  14. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Dahal, Et Al., 2012) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  15. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Elston, Et Al., 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  16. Geothermal Literature Review At Roosevelt Hot Springs Geothermal...

    Open Energy Info (EERE)

    Geothermal Literature Review At Roosevelt Hot Springs Geothermal Area (Petersen, 1975) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  17. National Geothermal Data System - DOE Geothermal Data Repository...

    Energy Savers [EERE]

    - DOE Geothermal Data Repository Presentation National Geothermal Data System - DOE Geothermal Data Repository Presentation Overview of the National Geothermal Data System (NGDS)...

  18. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Literature Review At Lightning Dock Geothermal Area (Clemons, Et Al., 1988) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  19. track 3: enhanced geothermal systems (EGS) | geothermal 2015...

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

    3: enhanced geothermal systems (EGS) | geothermal 2015 peer review track 3: enhanced geothermal systems (EGS) | geothermal 2015 peer review EGS technologies utilize directional...

  20. Geothermal Data Systems

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) Geothermal Technologies Office (GTO) has designed and tested a comprehensive, federated information system that will make geothermal data widely available. This new National Geothermal Data System (NGDS) will provide access to all types of geothermal data to enable geothermal analysis and widespread public use, thereby reducing the risk of geothermal energy development.

  1. Sierra Geothermal's Key Find in Southern Nevada

    Office of Energy Efficiency and Renewable Energy (EERE)

    In May 2010, Sierra Geothermal determined temperature at the bottom of a well drilled at the company's Alum project near Silver Peak, Nev., was hot enough for commercial-sized geothermal energy production - measured as 147 degrees Celsius (297 degrees Fahrenheit). A promising discovery by a geothermal energy company that could boost use of the renewable source in southwest Nevada, power thousands of homes and create jobs.

  2. Iceland Geothermal Conference 2013 - Geothermal Policies and...

    Broader source: Energy.gov (indexed) [DOE]

    Iceland Geothermal Conference presentation on March 7, 2013 by Chief Engineer Jay Nathwani of the U.S. Department of Energys Geothermal Technologies Office. icelandgeothermalco...

  3. SMU Geothermal Conference 2011 - Geothermal Technologies Program...

    Broader source: Energy.gov (indexed) [DOE]

    DOE Geothermal Technologies Program presentation at the SMU Geothermal Conference in June 2011. gtpsmuconferencereinhardt2011.pdf More Documents & Publications Low Temperature...

  4. Performance Evaluation of a ground source heat pump system based on ANN and ANFIS models 

    E-Print Network [OSTI]

    Sun, W.; Hu, P.; Lei, F.; Zhu, N.; Zhang,J.

    2014-01-01

    .H DONG," MATLAB neural network and application," Beijing: National Defense Industry Press, 2005. [10] S. A. Kalogirou, "Applications of artificial neural networks in energy systems," Energy Conversion and Management, vol. 40, pp. 1073-1087, 1999. [11... stream_source_info ESL-IC-14-09-38.pdf.txt stream_content_type text/plain stream_size 28204 Content-Encoding UTF-8 stream_name ESL-IC-14-09-38.pdf.txt Content-Type text/plain; charset=UTF-8 Performance evaluation of a...

  5. Federal Geothermal Research Program Update - Fiscal Year 2004

    SciTech Connect (OSTI)

    Patrick Laney

    2005-03-01

    The Department of Energy (DOE) and its predecessors have conducted research and development (R&D) in geothermal energy since 1971. The Geothermal Technologies Program (GTP) works in partnership with industry to establish geothermal energy as an economically competitive contributor to the U.S. energy supply. Geothermal energy production, a $1.5 billion a year industry, generates electricity or provides heat for direct use applications. The technologies developed by the Geothermal Technologies Program will provide the Nation with new sources of electricity that are highly reliable and cost competitive and do not add to America's air pollution or the emission of greenhouse gases. Geothermal electricity generation is not subject to fuel price volatility and supply disruptions from changes in global energy markets. Geothermal energy systems use a domestic and renewable source of energy. The Geothermal Technologies Program develops innovative technologies to find, access, and use the Nation's geothermal resources. These efforts include emphasis on Enhanced Geothermal Systems (EGS) with continued R&D on geophysical and geochemical exploration technologies, improved drilling systems, and more efficient heat exchangers and condensers. The Geothermal Technologies Program is balanced between short-term goals of greater interest to industry, and long-term goals of importance to national energy interests. The program's research and development activities are expected to increase the number of new domestic geothermal fields, increase the success rate of geothermal well drilling, and reduce the costs of constructing and operating geothermal power plants. These improvements will increase the quantity of economically viable geothermal resources, leading in turn to an increased number of geothermal power facilities serving more energy demand. These new geothermal projects will take advantage of geothermal resources in locations where development is not currently possible or economical.

  6. Federal Geothermal Research Program Update Fiscal Year 2004

    SciTech Connect (OSTI)

    Not Available

    2005-03-01

    The Department of Energy (DOE) and its predecessors have conducted research and development (R&D) in geothermal energy since 1971. The Geothermal Technologies Program (GTP) works in partnership with industry to establish geothermal energy as an economically competitive contributor to the U.S. energy supply. Geothermal energy production, a $1.5 billion a year industry, generates electricity or provides heat for direct use applications. The technologies developed by the Geothermal Technologies Program will provide the Nation with new sources of electricity that are highly reliable and cost competitive and do not add to America's air pollution or the emission of greenhouse gases. Geothermal electricity generation is not subject to fuel price volatility and supply disruptions from changes in global energy markets. Geothermal energy systems use a domestic and renewable source of energy. The Geothermal Technologies Program develops innovative technologies to find, access, and use the Nation's geothermal resources. These efforts include emphasis on Enhanced Geothermal Systems (EGS) with continued R&D on geophysical and geochemical exploration technologies, improved drilling systems, and more efficient heat exchangers and condensers. The Geothermal Technologies Program is balanced between short-term goals of greater interest to industry, and long-term goals of importance to national energy interests. The program's research and development activities are expected to increase the number of new domestic geothermal fields, increase the success rate of geothermal well drilling, and reduce the costs of constructing and operating geothermal power plants. These improvements will increase the quantity of economically viable geothermal resources, leading in turn to an increased number of geothermal power facilities serving more energy demand. These new geothermal projects will take advantage of geothermal resources in locations where development is not currently possible or economical.

  7. Exergy Analysis of a Two-Stage Ground Source Heat Pump with a Vertical Bore for Residential Space Conditioning under Simulated Occupancy

    SciTech Connect (OSTI)

    Ally, Moonis Raza; Munk, Jeffrey D; Baxter, Van D; Gehl, Anthony C

    2015-01-01

    This twelve-month field study analyzes the performance of a 7.56W (2.16- ton) water-to-air-ground source heat pump (WA-GSHP) to satisfy domestic space conditioning loads in a 253 m2 house in a mixed-humid climate in the United States. The practical feasibility of using the ground as a source of renewable energy is clearly demonstrated. Better than 75% of the energy needed for space heating was extracted from the ground. The average monthly electricity consumption for space conditioning was only 40 kWh at summer and winter thermostat set points of 24.4oC and 21.7oC, respectively. The WA-GSHP shared the same 94.5 m vertical bore ground loop with a separate water-to-water ground-source heat pump (WW-GSHP) for meeting domestic hot water needs in the same house. Sources of systemic irreversibility, the main cause of lost work are identified using Exergy and energy analysis. Quantifying the sources of Exergy and energy losses is essential for further systemic improvements. The research findings suggest that the WA-GSHPs are a practical and viable technology to reduce primary energy consumption and greenhouse gas emissions under the IECC 2012 Standard, as well as the European Union (EU) 2020 targets of using renewable energy resources.

  8. Marine and Land ActiveSource Seismic Imaging of midMiocene to Holoceneaged Faulting near Geothermal Prospects at Pyramid Lake, Nevada

    E-Print Network [OSTI]

    controls on geothermal systems and extensional regimes favor dilatational normal fault systems, which Geothermal Prospects at Pyramid Lake, Nevada Amy Eisses1,3, Annie Kell1,3, Graham Kent1,3, Neal Driscoll2 figure 1), a kinematically linked, en echelon system of leftstepping, dextral northwest striking

  9. Strategies for Detecting Hidden Geothermal Systems by Near-Surface Gas Monitoring

    SciTech Connect (OSTI)

    Lewicki, Jennifer L.; Oldenburg, Curtis M.

    2004-12-15

    ''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 subsurface and above ground in the near-surface environment to serve as a tool to discover hidden geothermal systems. We focus the investigation on CO2 due to (1) its abundance in geothermal systems, (2) its moderate solubility in water, and (3) the wide range of technologies available to monitor CO2 in the near-surface environment. However, monitoring in the near-surface environment for CO2 derived from hidden geothermal reservoirs is complicated by the large variation in CO2 fluxes and concentrations arising from natural biological and hydrologic processes. In the near-surface environment, the flow and transport of CO2 at high concentrations will be controlled by its high density, low viscosity, and high solubility in water relative to air. Numerical simulations of CO2 migration show that CO2 concentrations can reach very high levels in the shallow subsurface even for relatively low geothermal source CO2 fluxes. However, once CO2 seeps out of the ground into the atmospheric surface layer, surface winds are effective at dispersing CO2 seepage. In natural ecological systems in the absence of geothermal gas emissions, near-surface CO2 fluxes and concentrations are primarily controlled by CO2 uptake by photosynthesis, production by root respiration, and microbial decomposition of soil/subsoil organic matter, groundwater degassing, and exchange with the atmosphere. Available technologies for monitoring CO2 in the near-surface environment include (1) the infrared gas analyzer (IRGA) for measurement of concentrations at point locations, (2) the accumulation chamber (AC) method for measuring soil CO2 fluxes at point locations, (3) the eddy covariance (EC) method for measuring net CO2 flux over a given area, (4) hyperspectral imaging of vegetative stress resulting from elevated CO2 concentrations, and (5) light detection and ranging (LIDAR) that can measure CO2 concentrations over an integrated path. Technologies currently in developmental stages that have the potential to be used for CO2 monitoring include tunable lasers for long distance integrated concentration measurements and micro-electronic mechanical systems (MEMS) that can make widespread point measurements. To address the challenge of detecting potentially small-magnitude geothermal CO2 emissions within the natural background variability of CO2, we propose an approach that integrates available detection and monitoring methodologies with statistical analysis and modeling strategies. Within the area targeted for geothermal exploration, point measurements of soil CO2 fluxes and concentrations using the AC method and a portable IRGA, respectively, and measurements of net surface flux using EC should be made. Also, the natural spatial and temporal variability of surface CO2 fluxes and subsurface CO2 concentrations should be quantified within a background area with similar geologic, climatic, and ecosystem characteristics to the area targeted for geothermal exploration. Statistical analyses of data collected from both areas should be used to guide sampling strategy, discern spatial patterns that may be indicative of geothermal CO2 emissions, and assess the presence (or absence) of geothermal CO2 within the natural background variability with a desired confidence level. Once measured CO2 concentrations and fluxes have been determined to be of anomalous geothermal origin with high confidence, more expensive vertical subsurface gas sampling and chemical and isotopic analyses can be undertaken. Integrated analysis of all measurements will d

  10. Geothermal Technologies Program Overview Presentation at Stanford...

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

    Overview Presentation at Stanford Geothermal Workshop Geothermal Technologies Program Overview Presentation at Stanford Geothermal Workshop General overview of Geothermal...

  11. Sandia Energy - Geothermal Energy & Drilling Technology

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Geothermal Energy & Drilling Technology Home Stationary Power Energy Conversion Efficiency Geothermal Geothermal Energy & Drilling Technology Geothermal Energy & Drilling...

  12. IMPROVED METHODS FOR MAPPING PERMEABILITY AND HEAT SOURCES IN...

    Open Energy Info (EERE)

    a rich source of information about physical processes associated with Enhanced Geothermal Systems (EGS) experiments and other geothermal operations. With support from the...

  13. Geothermal energy for American Samoa

    SciTech Connect (OSTI)

    Not Available

    1980-03-01

    The geothermal commercialization potential in American Samoa was investigated. With geothermal energy harnessed in American Samoa, a myriad of possibilities would arise. Existing residential and business consumers would benefit from reduced electricity costs. The tuna canneries, demanding about 76% of the island's process heat requirements, may be able to use process heat from a geothermal source. Potential new industries include health spas, aquaculture, wood products, large domestic and transhipment refrigerated warehouses, electric cars, ocean nodule processing, and a hydrogen economy. There are no territorial statutory laws of American Samoa claiming or reserving any special rights (including mineral rights) to the territorial government, or other interests adverse to a land owner, for subsurface content of real property. Technically, an investigation has revealed that American Samoa does possess a geological environment conducive to geothermal energy development. Further studies and test holes are warranted.

  14. Session: Geopressured-Geothermal

    SciTech Connect (OSTI)

    Jelacic, Allan J.; Eaton, Ben A.; Shook, G. Michael; Birkinshaw, Kelly; Negus-de Wys, Jane

    1992-01-01

    This session at the Geothermal Energy Program Review X: Geothermal Energy and the Utility Market consisted of five presentations: ''Overview of Geopressured-Geothermal'' by Allan J. Jelacic; ''Geothermal Well Operations and Automation in a Competitive Market'' by Ben A. Eaton; ''Reservoir Modeling and Prediction at Pleasant Bayou Geopressured-Geothermal Reservoir'' by G. Michael Shook; ''Survey of California Geopressured-Geothermal'' by Kelly Birkinshaw; and ''Technology Transfer, Reaching the Market for Geopressured-Geothermal Resources'' by Jane Negus-de Wys.

  15. Inversion of synthetic aperture radar interferograms for sources of production-related subsidence at the Dixie Valley geothermal field

    E-Print Network [OSTI]

    Foxall, B.; Vasco, D.W.

    2008-01-01

    Monitoring and modeling land subsidence at the Cerro PrietoH. Vadon (1997), “Land subsidence caused by the East MesaA third potential source of subsidence that we are presently

  16. Use of Geophysical Techniques to Characterize Fluid Flow in a Geothermal Reservoir

    Broader source: Energy.gov [DOE]

    Project objectives: Joint inversion of geophysical data for ground water flow imaging; Reduced the cost in geothermal exploration and monitoring; & Combined passive and active geophysical methods.

  17. Enhanced Geothermal Systems Demonstration Projects

    SciTech Connect (OSTI)

    Geothermal Technologies Office

    2013-08-06

    Several Enhanced Geothermal Systems (EGS) demonstration projects are highlighted on this Geothermal Technologies Office Web page.

  18. Geothermal Data from the National Geothermal Data System (NGDS)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The National Geothermal Data System (NGDS) is a distributed data system providing access to information resources related to geothermal energy from a network of data providers. Data are contributed by academic researchers, private industry, and state and federal agencies. Built on a scalable and open platform through the U.S. Geoscience Information Network (USGIN), NGDS respects data provenance while promoting shared resources.Since NGDS is built using a set of open protocols and standards, relying on the Open Geospatial Consortium (OGC) and International Organization for Standardization (ISO), members of the community may access the data in a variety of proprietary and open-source applications and software. In addition, developers can add functionality to the system by creating new applications based on the open protocols and standards of the NGDS. The NGDS, supported by the U.S. Department of Energy’s Geothermal Technology Program, is intended to provide access to all types of geothermal data to enable geothermal analysis and widespread public use in an effort to reduce the risk of geothermal energy development [copied from http://www.geothermaldata.org/page/about]. See the long list of data contributors at http://geothermaldata.org/page/data-types-and-contributors#data-contributors.

  19. Isotopic Analysis- Gas At Dixie Valley Geothermal Area (Kennedy...

    Open Energy Info (EERE)

    purpose of this research activity was to determine the fluid and heat source, Identify flow paths, and evaluate the possibility of a more extensive deep geothermal reservoir...

  20. El Paso County Geothermal Electric Generation Project: Innovative...

    Open Energy Info (EERE)

    Bliss and other military reservations obtain specified percentages of their power from renewable sources of production. The geothermal resource to be evaluated, if commercially...

  1. NREL Releases Report on Policy Options to Advance Geothermal...

    Broader source: Energy.gov (indexed) [DOE]

    wind and solar power production and reducing variability in energy prices. Source: NREL Award-winning research takes a fresh look at Geothermal Energy New Studies Aid in...

  2. High Power Laser Innovation Sparks Geothermal Power Potential...

    Energy Savers [EERE]

    project partner Foro Energy lab tests a high power laser tool with a patented technology that could maximize heat recovery from geothermal wells. Source: Foro Energy....

  3. High Power Laser Innovation Sparks Geothermal Power Potential...

    Broader source: Energy.gov (indexed) [DOE]

    Energy Department's project partner Foro Energy lab tests a high power laser tool with a patented technology that could maximize heat recovery from geothermal wells. Source: Foro...

  4. Near-Surface CO2 Monitoring And Analysis To Detect Hidden Geothermal Systems

    SciTech Connect (OSTI)

    Lewicki, Jennifer L.; Oldenburg, Curtis M.

    2005-01-19

    ''Hidden'' geothermal systems are systems devoid of obvious surface hydrothermal manifestations. Emissions of moderate-to-low solubility gases may be one of the primary near-surface signals from these systems. We investigate the potential for CO2 detection and monitoring below and above ground in the near-surface environment as an approach to exploration targeting hidden geothermal systems. We focus on CO2 because it is the dominant noncondensible gas species in most geothermal systems and has moderate solubility in water. We carried out numerical simulations of a CO2 migration scenario to calculate the magnitude of expected fluxes and concentrations. Our results show that CO2 concentrations can reach high levels in the shallow subsurface even for relatively low geothermal source CO2 fluxes. However, once CO2 seeps out of the ground into the atmospheric surface layer, winds are effective at dispersing CO2 seepage. In natural ecological systems in the absence of geothermal gas emissions, near-surface CO2 fluxes and concentrations are predominantly controlled by CO2 uptake by photosynthesis, production by root respiration, microbial decomposition of soil/subsoil organic matter, groundwater degassing, and exchange with the atmosphere. Available technologies for monitoring CO2 in the near-surface environment include the infrared gas analyzer, the accumulation chamber method, the eddy covariance method, hyperspectral imaging, and light detection and ranging. To meet the challenge of detecting potentially small-magnitude geothermal CO2 emissions within the natural background variability of CO2, we propose an approach that integrates available detection and monitoring techniques with statistical analysis and modeling strategies. The proposed monitoring plan initially focuses on rapid, economical, reliable measurements of CO2 subsurface concentrations and surface fluxes and statistical analysis of the collected data. Based on this analysis, are as with a high probability of containing geothermal CO2 anomalies can be further sampled and analyzed using more expensive chemical and isotopic methods. Integrated analysis of all measurements will determine definitively if CO2 derived from a deep geothermal source is present, and if so, the spatial extent of the anomaly. The suitability of further geophysical measurements, installation of deep wells, and geochemical analyses of deep fluids can then be determined based on the results of the near surface CO2 monitoring program.

  5. GRC Workshop: The Power of the National Geothermal Data System

    Office of Energy Efficiency and Renewable Energy (EERE)

    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 and consistent, reliable geological and geothermal information from all 50 states, this free, interactive tool can shorten project development timelines and facilitate scientific discovery and best practices. Stop by our workshop for an overview of how your company can benefit from implementing, and participating in this open-source based, distributed network. To register for the GRC Annual Meeting, visit the GRC Annual Meeting and GEA Geothermal Energy Expo event website.

  6. Indiana/Geothermal | Open Energy Information

    Open Energy Info (EERE)

    No geothermal projects listed. Add a geothermal project. Operational Geothermal Power Plants in Indiana No geothermal power plants listed. Add a geothermal energy generation...

  7. Geothermal Money Book [Geothermal Outreach and Project Financing

    SciTech Connect (OSTI)

    Elizabeth Battocletti

    2004-02-01

    Small business lending is big business and growing. Loans under $1 million totaled $460 billion in June 2001, up $23 billion from 2000. The number of loans under $100,000 continued to grow at a rapid rate, growing by 10.1%. The dollar value of loans under $100,000 increased 4.4%; those of $100,000-$250,000 by 4.1%; and those between $250,000 and $1 million by 6.4%. But getting a loan can be difficult if a business owner does not know how to find small business-friendly lenders, how to best approach them, and the specific criteria they use to evaluate a loan application. This is where the Geothermal Money Book comes in. Once a business and financing plan and financial proposal are written, the Geothermal Money Book takes the next step, helping small geothermal businesses locate and obtain financing. The Geothermal Money Book will: Explain the specific criteria potential financing sources use to evaluate a proposal for debt financing; Describe the Small Business Administration's (SBA) programs to promote lending to small businesses; List specific small-business friendly lenders for small geothermal businesses, including those which participate in SBA programs; Identify federal and state incentives which are relevant to direct use and small-scale (< 1 megawatt) power generation geothermal projects; and Provide an extensive state directory of financing sources and state financial incentives for the 19 states involved in the GeoPowering the West (GPW). GPW is a U.S. Department of Energy-sponsored activity to dramatically increase the use of geothermal energy in the western United States by promoting environmentally compatible heat and power, along with industrial growth and economic development. The Geothermal Money Book will not: Substitute for financial advice; Overcome the high exploration, development, and financing costs associated with smaller geothermal projects; Remedy the lack of financing for the exploration stage of a geothermal project; or Solve financing problems that are not related to the economic soundness of your project or are caused by things outside of your control.

  8. National Geothermal Summit

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Geothermal Energy Association (GEA) will be holding it’s fifth annual National Geothermal Summit on June 3-4 at the Grand Sierra Resort and Casino in Reno, NV. The National Geothermal Summit is...

  9. Geothermal tomorrow 2008

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    Contributors from the Geothermal Technologies Program and the geothermal community highlight the current status and activities of the Program and the development of the global resource of geothermal energy.

  10. International Partnership for Geothermal Technology Launches...

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

    Technology Launches Website November 18, 2008 - 2:52pm Addthis Geothermal energy, with EGS, has the potential to be the world's only renewable baseload power source. It is clean,...

  11. Geothermal probabilistic cost study

    SciTech Connect (OSTI)

    Orren, L.H.; Ziman, G.M.; Jones, S.C.; Lee, T.K.; Noll, R.; Wilde, L.; Sadanand, V.

    1981-08-01

    A tool is presented to quantify the risks of geothermal projects, the Geothermal Probabilistic Cost Model (GPCM). The GPCM model is used to evaluate a geothermal reservoir for a binary-cycle electric plant at Heber, California. Three institutional aspects of the geothermal risk which can shift the risk among different agents are analyzed. The leasing of geothermal land, contracting between the producer and the user of the geothermal heat, and insurance against faulty performance are examined. (MHR)

  12. Modeling of Heat Transfer in Geothermal Heat Exchangers 

    E-Print Network [OSTI]

    Cui, P.; Man, Y.; Fang, Z.

    2006-01-01

    Ground-coupled heat pump (GCHP) systems have been gaining increasing popularity for space conditioning in residential and commercial buildings. The geothermal heat exchanger (GHE) is devised for extraction or injection of thermal energy from...

  13. Data, exergy, and energy analysis of a vertical-bore, ground-source heat pump to for domestic water heating under simulated occupancy conditions

    SciTech Connect (OSTI)

    Ally, Moonis Raza; Munk, Jeffrey D; Baxter, Van D; Gehl, Anthony C

    2015-01-01

    Evidence is provided to support the view that greater than two-thirds of energy required to produce domestic hot water may be extracted from the ground which serves as renewable energy resource. The case refers to a 345 m2 research house located in Oak Ridge, Tennessee, 36.01 N 84.26 W in a mixed-humid climate with HDD of 2218 C-days (3993 F-days) and CDD of 723 C-days (1301 F-days). The house is operated under simulated occupancy conditions in which the hot water use protocol is based on the Building America Research Benchmark Definition (Hendron 2008; Hendron and Engebrecht 2010) which captures the water consumption lifestyles of the average family in the United States. The 5.275 (1.5-ton) water-to-water ground source heat pump (WW-GSHP) shared the same vertical bore with a 7.56 KW water-to-air ground source heat pump for space conditioning the same house. Energy and exergy analysis of data collected continuously over a twelve month period provide performance metrics and sources of inherent systemic inefficiencies. Data and analyses are vital to better understand how WW-GSHPs may be further improved to enable the ground to be used as a renewable energy resource.

  14. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    At Lightning Dock Geothermal Area (Witcher, Et Al., 2002) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At...

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

    Open Energy Info (EERE)

    National Geothermal Data System (NGDS) Geothermal Data Domain: Assessment of Geothermal Community Data Needs Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  16. Geothermal Literature Review At Long Valley Caldera Geothermal...

    Open Energy Info (EERE)

    Geothermal Literature Review At Long Valley Caldera Geothermal Area (Goldstein & Flexser, 1984) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  17. CleanEnergyPatentMapper: Visualization of the sources of clean tech inventions

    E-Print Network [OSTI]

    Sekhon, Jasjeet S.

    by technology: solar, wind, biofuel, geothermal, hydroelectricity, and nuclear, and by inventing source

  18. Building America Case Study: Ground Source Heat Pump Research, TaC Studios Residence, Atlanta, Georigia (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-09-01

    As part of the NAHB Research Center Industry Partnership, Southface partnered with TaC Studios, an Atlanta based architecture firm specializing in residential and light commercial design, on the construction of a new test home in Atlanta, GA in the mixed-humid climate. This home serves as a residence and home office for the firm's owners, as well as a demonstration of their design approach to potential and current clients. Southface believes the home demonstrates current best practices for the mixed-humid climate, including a building envelope featuring advanced air sealing details and low density spray foam insulation, glazing that exceeds ENERGY STAR requirements, and a high performance heating and cooling system. Construction quality and execution was a high priority for TaC Studios and was ensured by a third party review process. Post construction testing showed that the project met stated goals for envelope performance, an air infiltration rate of 2.15 ACH50. The homeowner's wished to further validate whole house energy savings through the project's involvement with Building America and this long-term monitoring effort. As a Building America test home, this home was evaluated to detail whole house energy use, end use loads, and the efficiency and operation of the ground source heat pump and associated systems. Given that the home includes many non-typical end use loads including a home office, pool, landscape water feature, and other luxury features not accounted for in Building America modeling tools, these end uses were separately monitored to determine their impact on overall energy consumption.

  19. Geothermal Tomorrow

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,Executive CompensationEnergy GeothermalDemonstration2008

  20. Geothermal Today: 2005 Geothermal Technologies Program Highlights

    SciTech Connect (OSTI)

    Not Available

    2005-09-01

    This DOE/EERE Geothermal Technologies Program publication highlights accomplishments and activities of the program during the last two years.

  1. Dual-temperature Kalina cycle for geothermal-solar hybrid power systems

    E-Print Network [OSTI]

    Boghossian, John G

    2011-01-01

    This thesis analyzes the thermodynamics of a power system coupling two renewable heat sources: low-temperature geothermal and a high-temperature solar. The process, referred to as a dual-temperature geothermal-solar Kalina ...

  2. Nevada: basic data for thermal springs and wells as recorded in GEOTHERM. Part A

    SciTech Connect (OSTI)

    Bliss, J.D.

    1983-06-01

    All chemical data for geothermal fluids in Nevada available as of December 1981 are maintained on GEOTHERM, a computerized information system. This report presents summaries and sources of records for Nevada. 7 refs. (ACR)

  3. GEOTHERMAL SUBSIDENCE RESEARCH PROGRAM PLAN

    E-Print Network [OSTI]

    Lippmann, Marcello J.

    2010-01-01

    the division of Geothermal Energy. TASK 1 Identify Areas forLaboratory, NSF Geothermal Energy Conference, Pasadena,associated with geothermal energy development. These g o a l

  4. GEOTHERMAL SUBSIDENCE RESEARCH PROGRAM PLAN

    E-Print Network [OSTI]

    Lippmann, Marcello J.

    2010-01-01

    of Subsiding Areas and Geothermal Subsidence Potential25 Project 2-Geothermal Subsidence Potential Maps . . . . .Subsidence Caused by a Geothermal Project and Subsidence Due

  5. GEOTHERMAL SUBSIDENCE RESEARCH PROGRAM PLAN

    E-Print Network [OSTI]

    Lippmann, Marcello J.

    2010-01-01

    Liquid Dominated Geothermal Systems," Second Intern. Symp.behavior related to geothermal systems and their potentialsetting of most geothermal systems is such that natural

  6. Video Resources on Geothermal Technologies

    Broader source: Energy.gov [DOE]

    Geothermal video offerings at the Department of Energy include simple interactive illustrations of geothermal power technologies and interviews on initiatives in the Geothermal Technologies Office.

  7. Geothermal Technologies Newsletter

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy's (DOE) Geothermal Technologies Newsletter features the latest information about its geothermal research and development efforts. The Geothermal Resources Council (GRC)— a tax-exempt, non-profit, geothermal educational association — publishes quarterly as an insert in its GRC Bulletin.

  8. Geothermal Tomorrow 2008

    SciTech Connect (OSTI)

    Not Available

    2008-09-01

    Brochure describing the recent activities and future research direction of the DOE Geothermal Program.

  9. Geothermal Progress Monitor report No. 11

    SciTech Connect (OSTI)

    Not Available

    1989-12-01

    This issue of the Geothermal Progress Monitor (GPM) is the 11th since the inception of the publication in 1980. It continues to synthesize information on all aspects of geothermal development in this country and abroad to permit identification and quantification of trends in the use of this energy technology. In addition, the GPM is a mechanism for transferring current information on geothermal technology development to the private sector, and, over time, provides a historical record for those interested in the development pathway of the resource. In sum, the Department of Energy makes the GPM available to the many diverse interests that make up the geothermal community for the multiple uses it may serve. This issue of the GPM points up very clearly how closely knit many of those diverse interests have become. It might well be called an international issue'' since many of its pages are devoted to news of geothermal development abroad, to the efforts of the US industry to participate in overseas development, to the support given those efforts by federal and state agencies, and to the formation of the International Geothermal Association (IGA). All of these events indicate that the geothermal community has become truly international in character, an occurrence that can only enhance the future of geothermal energy as a major source of energy supply worldwide. 15 figs.

  10. ORS 522.135 Permit Time Limit for Action, Grounds for Issuance...

    Open Energy Info (EERE)

    Time Limit for Action, Grounds for Issuance, Conditions, and Fees for Geothermal Resources Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document-...

  11. New geothermal heat extraction process to deliver clean power generation

    ScienceCinema (OSTI)

    Pete McGrail

    2012-12-31

    A new method for capturing significantly more heat from low-temperature geothermal resources holds promise for generating virtually pollution-free electrical energy. Scientists at the Department of Energys Pacific Northwest National Laboratory will determine if their innovative approach can safely and economically extract and convert heat from vast untapped geothermal resources. The goal is to enable power generation from low-temperature geothermal resources at an economical cost. In addition to being a clean energy source without any greenhouse gas emissions, geothermal is also a steady and dependable source of power.

  12. Stanford Geothermal Program Final Report

    E-Print Network [OSTI]

    Stanford University

    1 Stanford Geothermal Program Final Report July 1990 - June 1996 Stanford Geothermal Program. THE EFFECTS OF ADSORPTION ON VAPOR-DOMINATED GEOTHERMAL FIELDS.1 1.1 SUMMARY? ..............................................................................................2 1.4 ADSORPTION IN GEOTHERMAL RESERVOIRS ........................................................3

  13. RAPID/Geothermal/Roadmap | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onRAPID/Geothermal/Exploration/Colorado < RAPID‎RAPID/Geothermal/Land Use/Federal < RAPID‎ | Geothermal‎source

  14. Geothermal Literature Review At Cascades Region (Ingebritsen...

    Open Energy Info (EERE)

    Geothermal Literature Review At Cascades Region (Ingebritsen & Mariner, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal...

  15. Dominica Grants Geothermal Exploration and Development License...

    Energy Savers [EERE]

    Energy Needs Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Resources Low-Temperature & Coproduced Resources Systems...

  16. Wyoming/Geothermal | Open Energy Information

    Open Energy Info (EERE)

    (MW) Number of Plants Owners Geothermal Region Huckleberry Hot Springs Geothermal Area Yellowstone Caldera Geothermal Region Seven Mile Hole Geothermal Area Yellowstone Caldera...

  17. Induced seismicity associated with enhanced geothermal system

    E-Print Network [OSTI]

    Majer, Ernest L.

    2006-01-01

    induced seismicity in geothermal systems. In: Proceedings ofThe deep EGS (Enhanced Geothermal System) project at Soultz-with enhanced geothermal systems. Geothermal Resources

  18. Hydrogeologic Evaluation of a Ground-Source Cooling System at the BSF/CSF on the Battelle Campus: Final Report

    SciTech Connect (OSTI)

    Freedman, Vicky L.; Mackley, Rob D.; Waichler, Scott R.; Horner, Jacob A.; Moon, Thomas W.; Newcomer, Darrell R.; DeSmet, Darrell J.; Lindsey, K. A.; Porcello, J. J.

    2010-05-12

    This report documents both the field characterization activities and the numerical modeling effort at the BSF/CSF site to determine the viability of an open-loop ground source heat pump (GSHP). The primary purpose of the integrated field and modeling study was to determine far-field impacts related to a non-consumptive use water right for the well field containing four extraction and four injection wells. In the field, boreholes were logged and used to develop the geologic conceptual model. Hydraulic testing was performed to identify hydraulic properties and determine sustainable pumping rates. Estimates of the Ringold hydraulic conductivity (60-150 m/d) at the BSF/CSF site were consistent with the local and regional hydrogeology as well as estimates previously published by other investigators. Sustainable pumping rates at the extraction wells were variable (100 – 700 gpm), and confirmed field observations of aquifer heterogeneity. Field data were used to develop a numerical model of the site. Simulations assessed the potential of the well field to impact nearby contaminant plumes, neighboring water rights, and the thermal regime of nearby surface water bodies. Using steady-state flow scenarios in conjunction with particle tracking, a radius of influence of 400–600 m was identified around the well field. This distance was considerably shorter than the distance to the closest contaminant plume (~1.2 km northwest to the DOE Horn Rapids Landfill) and the nearest water right holder (~1.2 km southeast to the City of Richland Well Field). Results demonstrated that current trajectories for nearby contaminant plumes will not be impacted by the operation of the GSHP well field. The objective of the energy transport analysis was to identify potential thermal impacts to the Columbia River under likely operational scenarios for the BSF/CSF well field. Estimated pumping rates and injection temperatures were used to simulate heat transport for a range of hydraulic conductivity estimates for the Ringold Formation. Two different operational scenarios were simulated using conservative assumptions, such as the absence of river water intrusion in the near shore groundwater. When seasonal injection of warm and cool water occurred, temperature impacts were insignificant at the Columbia River (< +0.2ºC), irrespective of the hydraulic conductivity estimate. The second operational scenario simulated continuous heat rejection, a condition anticipated once the BSF/CSF is fully loaded with laboratory and computer equipment. For the continuous heat rejection case, where hourly peak conditions were simulated as month-long peaks, the maximum change in temperature along the shoreline was ~1ºC. If this were to be interpreted as an absolute change in a static river temperature, it could be considered significant. However, the warmer-than-ambient groundwater flux that would potentially discharge to the Columbia River is very small relative to the flow in the river. For temperatures greater than 17.0ºC, the flow relative to a low-flow condition in the river is only 0.012%. Moreover, field data has shown that diurnal fluctuations in temperature are as high as 5ºC along the shoreline.

  19. Guidebook to Geothermal Finance

    SciTech Connect (OSTI)

    Salmon, J. P.; Meurice, J.; Wobus, N.; Stern, F.; Duaime, M.

    2011-03-01

    This guidebook is intended to facilitate further investment in conventional geothermal projects in the United States. It includes a brief primer on geothermal technology and the most relevant policies related to geothermal project development. The trends in geothermal project finance are the focus of this tool, relying heavily on interviews with leaders in the field of geothermal project finance. Using the information provided, developers and investors may innovate in new ways, developing partnerships that match investors' risk tolerance with the capital requirements of geothermal projects in this dynamic and evolving marketplace.

  20. Measured Performance and Analysis of Ground Source Heat Pumps for Space Conditioning and for Water Heating in a Low-Energy Test House Operated under Simulated Occupancy Conditions

    SciTech Connect (OSTI)

    Ally, Moonis Raza [ORNL] [ORNL; Munk, Jeffrey D [ORNL] [ORNL; Baxter, Van D [ORNL] [ORNL; Gehl, Anthony C [ORNL] [ORNL

    2012-01-01

    In this paper we present measured performance and efficiency metrics of Ground Source Heat Pumps (GSHPs) for space conditioning and for water heating connected to a horizontal ground heat exchanger (GHX) loop. The units were installed in a 345m2 (3700ft2) high-efficiency test house built with structural insulated panels (SIPs), operated under simulated occupancy conditions, and located in Oak Ridge, Tennessee (USA) in US Climate Zone 4 . The paper describes distinctive features of the building envelope, ground loop, and equipment, and provides detailed monthly performance of the GSHP system. Space conditioning needs of the house were completely satisfied by a nominal 2-ton (7.0 kW) water-to-air GSHP (WA-GSHP) unit with almost no auxiliary heat usage. Recommendations for further improvement through engineering design changes are identified. The comprehensive set of data and analyses demonstrate the feasibility and practicality of GSHPs in residential applications and their potential to help achieve source energy and greenhouse gas emission reduction targets set under the IECC 2012 Standard.

  1. A guide to geothermal energy and the environment

    SciTech Connect (OSTI)

    Kagel, Alyssa; Bates, Diana; Gawell, Karl

    2005-04-22

    Geothermal energy, defined as heat from the Earth, is a statute-recognized renewable resource. The first U.S. geothermal power plant, opened at The Geysers in California in 1960, continues to operate successfully. The United States, as the world's largest producer of geothermal electricity, generates an average of 15 billion kilowatt hours of power per year, comparable to burning close to 25 million barrels of oil or 6 million short tons of coal per year. Geothermal has a higher capacity factor (a measure of the amount of real time during which a facility is used) than many other power sources. Unlike wind and solar resources, which are more dependent upon weather fluctuations and climate changes, geothermal resources are available 24 hours a day, 7 days a week. While the carrier medium for geothermal electricity (water) must be properly managed, the source of geothermal energy, the Earth's heat, will be available indefinitely. A geothermal resource assessment shows that nine western states together have the potential to provide over 20 percent of national electricity needs. Although geothermal power plants, concentrated in the West, provide the third largest domestic source of renewable electricity after hydropower and biomass, they currently produce less than one percent of total U.S. electricity.

  2. Geothermal Development and the Use of Categorical Exclusions (Poster)

    SciTech Connect (OSTI)

    Levine, A.; Young, K. R.

    2014-09-01

    The federal environmental review process under the National Environmental Policy Act of 1969 (NEPA) can be complex and time consuming. Currently, a geothermal developer may have to complete the NEPA process multiple times during the development of a geothermal project. One mechanism to reduce the timeframe of the federal environmental review process for activities that do not have a significant environmental impact is the use of Categorical Exclusions (CXs), which can exempt projects from having to complete an Environmental Assessment or Environmental Impact Statement. This study focuses primarily on the CX process and its applicability to geothermal exploration. In this paper, we Provide generalized background information on CXs, including previous NEPA reports addressing CXs, the process for developing CXs, and the role of extraordinary circumstances; Examine the history of the Bureau of Land Management's (BLM) geothermal CXs;Compare current CXs for oil, gas, and geothermal energy; Describe bills proposing new statutory CXs; Examine the possibility of standardizing geothermal CXs across federal agencies; and Present analysis from the Geothermal NEPA Database and other sources on the potential for new geothermal exploration CXs. As part of this study, we reviewed Environmental Assessments (EAs) conducted in response to 20 geothermal exploration drilling permit applications (Geothermal Drilling Permits or Notices of Intents) since the year 2001, the majority of which are from the last 5 years. All 20 EAs reviewed for this study resulted in a Finding of No Significant Impact (FONSI). While many of these FONSI's involved proponent proposed or federal agency required mitigation, this still suggests it may be appropriate to create or expand an exploration drilling CX for geothermal, which would have a significant impact on reducing geothermal exploration timelines and up-front costs. Ultimately, federal agencies tasked with permitting and completing environmental reviews for geothermal exploration drilling activities and/or legislative representatives are the responsible parties to discuss the merits and implementation of new or revised CXs for geothermal development.

  3. Symposium in the field of geothermal energy

    SciTech Connect (OSTI)

    Ramirez, Miguel; Mock, John E.

    1989-04-01

    Mexico and the US are nations with abundant sources of geothermal energy, and both countries have progressed rapidly in developing their more accessible resources. For example, Mexico has developed over 600 MWe at Cerro Prieto, while US developers have brought in over 2000 MWe at the Geysers. These successes, however, are only a prologue to an exciting future. All forms of energy face technical and economic barriers that must be overcome if the resources are to play a significant role in satisfying national energy needs. Geothermal energy--except for the very highest grade resources--face a number of barriers, which must be surmounted through research and development. Sharing a common interest in solving the problems that impede the rapid utilization of geothermal energy, Mexico and the US agreed to exchange information and participate in joint research. An excellent example of this close and continuing collaboration is the geothermal research program conducted under the auspices of the 3-year agreement signed on April 7, 1986 by the US DOE and the Mexican Comision Federal de Electricidad (CFE). The major objectives of this bilateral agreement are: (1) to achieve a thorough understanding of the nature of geothermal reservoirs in sedimentary and fractured igneous rocks; (2) to investigate how the geothermal resources of both nations can best be explored and utilized; and (3) to exchange information on geothermal topics of mutual interest.

  4. Internship at the University of Nice Sophia Antipolis Discretization of geothermal systems in fractured porous

    E-Print Network [OSTI]

    Vallette, Bruno

    Geothermal energy is a carbon-free steady energy source with low environmental impact. In countries with a favorable geological context, high temperature geothermal energy can make a significant contribution of Guadeloupe already comes from geothermal energy and it is essential for achieving energetic and environmental

  5. GEOTHERM Data Set

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    DeAngelo, Jacob

    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.

  6. GEOTHERMAL POWER GENERATION PLANT

    Broader source: Energy.gov [DOE]

    Project objectives: Drilling a deep geothermal well on the Oregon Institute of Technology campus, Klamath Falls, OR. Constructing a geothermal power plant on the Oregon Institute of Technology campus.

  7. GEOTHERM Data Set

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    DeAngelo, Jacob

    1983-01-01

    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.

  8. Summer 2012 National Geothermal Academy: Applications Due February...

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

    Course modules include: Introduction to Geothermal Energy Utilization Geothermal Geology and Geochemistry Geothermal Field Trips Geothermal Geophysics Drilling Engineering...

  9. Doug Hollett Gives Keynote Presentation at Stanford Geothermal...

    Energy Savers [EERE]

    Geothermal Energy Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Resources Low-Temperature & Coproduced Resources Systems...

  10. Water Use in Enhanced Geothermal Systems (EGS): Geology of U.S. Stimulation Projects, Water Costs, and Alternative Water Use Policies

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Schroeder, Jenna N.

    2014-12-16

    According to the Energy Information Administration (EIA) of the U.S. Department of Energy (DOE), geothermal energy generation in the United States is projected to more than triple by 2040 (EIA 2013). This addition, which translates to more than 5 GW of generation capacity, is anticipated because of technological advances and an increase in available sources through the continued development of enhanced geothermal systems (EGSs) and low-temperature resources (EIA 2013). Studies have shown that air emissions, water consumption, and land use for geothermal electricity generation have less of an impact than traditional fossil fuel?based electricity generation; however, the long-term sustainability of geothermal power plants can be affected by insufficient replacement of aboveground or belowground operational fluid losses resulting from normal operations (Schroeder et al. 2014). Thus, access to water is therefore critical for increased deployment of EGS technologies and, therefore, growth of the geothermal sector. This paper examines water issues relating to EGS development from a variety of perspectives. It starts by exploring the relationship between EGS site geology, stimulation protocols, and below ground water loss, which is one of the largest drivers of water consumption for EGS projects. It then examines the relative costs of different potential traditional and alternative water sources for EGS. Finally it summarizes specific state policies relevant to the use of alternative water sources for EGS, and finally explores the relationship between EGS site geology, stimulation protocols, and below ground water loss, which is one of the largest drivers of water consumption for EGS projects.

  11. Water Use in Enhanced Geothermal Systems (EGS): Geology of U.S. Stimulation Projects, Water Costs, and Alternative Water Use Policies

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Schroeder, Jenna N.

    According to the Energy Information Administration (EIA) of the U.S. Department of Energy (DOE), geothermal energy generation in the United States is projected to more than triple by 2040 (EIA 2013). This addition, which translates to more than 5 GW of generation capacity, is anticipated because of technological advances and an increase in available sources through the continued development of enhanced geothermal systems (EGSs) and low-temperature resources (EIA 2013). Studies have shown that air emissions, water consumption, and land use for geothermal electricity generation have less of an impact than traditional fossil fuel?based electricity generation; however, the long-term sustainability of geothermal power plants can be affected by insufficient replacement of aboveground or belowground operational fluid losses resulting from normal operations (Schroeder et al. 2014). Thus, access to water is therefore critical for increased deployment of EGS technologies and, therefore, growth of the geothermal sector. This paper examines water issues relating to EGS development from a variety of perspectives. It starts by exploring the relationship between EGS site geology, stimulation protocols, and below ground water loss, which is one of the largest drivers of water consumption for EGS projects. It then examines the relative costs of different potential traditional and alternative water sources for EGS. Finally it summarizes specific state policies relevant to the use of alternative water sources for EGS, and finally explores the relationship between EGS site geology, stimulation protocols, and below ground water loss, which is one of the largest drivers of water consumption for EGS projects.

  12. Geothermal | ornl.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Applying advanced materials to improve well construction technologies Development of harsh environment sensors for reservoir characterization DOE Geothermal Technologies Office...

  13. Other Geothermal Energy Publications

    Broader source: Energy.gov [DOE]

    Here you'll find links to other organization's publications — including technical reports, newsletters, brochures, and more — about geothermal energy.

  14. Geothermal Industry Partnership Opportunities

    Broader source: Energy.gov [DOE]

    Here you'll find links to information about partnership opportunities and programs for the geothermal industry.

  15. Daemen Alternative Energy/Geothermal Technologies Demonstration Program Erie County

    SciTech Connect (OSTI)

    Robert C. Beiswanger, Jr.

    2010-05-20

    The purpose of the Daemen Alternative Energy/Geothermal Technologies Demonstration Project is to demonstrate the use of geothermal technology as model for energy and environmental efficiency in heating and cooling older, highly inefficient buildings. The former Marian Library building at Daemen College is a 19,000 square foot building located in the center of campus. Through this project, the building was equipped with geothermal technology and results were disseminated. Gold LEED certification for the building was awarded. 1) How the research adds to the understanding of the area investigated. This project is primarily a demonstration project. Information about the installation is available to other companies, organizations, and higher education institutions that may be interested in using geothermal energy for heating and cooling older buildings. 2) The technical effectiveness and economic feasibility of the methods or techniques investigated or demonstrated. According to the modeling and estimates through Stantec, the energy-efficiency cost savings is estimated at 20%, or $24,000 per year. Over 20 years this represents $480,000 in unrestricted revenue available for College operations. See attached technical assistance report. 3) How the project is otherwise of benefit to the public. The Daemen College Geothermal Technologies Ground Source Heat Pumps project sets a standard for retrofitting older, highly inefficient, energy wasting and environmentally irresponsible buildings�¢����quite typical of many of the buildings on the campuses of regional colleges and universities. As a model, the project serves as an energy-efficient system with significant environmental advantages. Information about the energy-efficiency measures is available to other colleges and universities, organizations and companies, students, and other interested parties. The installation and renovation provided employment for 120 individuals during the award period. Through the new Center, Daemen will continue to host a range of events on campus for the general public. The College does not charge fees for speakers or most other events. This has been a long-standing tradition of the College.

  16. Process for purifying geothermal steam

    DOE Patents [OSTI]

    Li, Charles T. (Richland, WA)

    1980-01-01

    Steam containing hydrogen sulfide is purified and sulfur recovered by passing the steam through a reactor packed with activated carbon in the presence of a stoichiometric amount of oxygen which oxidizes the hydrogen sulfide to elemental sulfur which is adsorbed on the bed. The carbon can be recycled after the sulfur has been recovered by vacuum distillation, inert gas entrainment or solvent extraction. The process is suitable for the purification of steam from geothermal sources which may also contain other noncondensable gases.

  17. Geothermal research at Oklahoma State University: An integrated approach

    SciTech Connect (OSTI)

    Smith, M.D.

    1997-12-31

    Oklahoma State University and the International Ground Source Heat Pump Association (IGSHPA) are active in providing technical support to government and industry through technology transfer, technology development, technical assistance, and business development support. Technology transfer includes geothermal heat pump (GHP) system training for installers and architects and engineers, national teleconferences, brochures, and other publications. Technology development encompasses design software development, GLHEPRO, in-situ thermal conductivity testing methods and verification of data reduction techniques, and specifications and standards for GHP systems. Examples of technical assistance projects are a Navy officers quarters and a NASA Visitors Center which required design assistance and supporting information in reducing the life cycle cost to make them viable projects.

  18. GEOTHERMAL PILOT STUDY FINAL REPORT: CREATING AN INTERNATIONAL GEOTHERMAL ENERGY COMMUNITY

    E-Print Network [OSTI]

    Bresee, J. C.

    2011-01-01

    B. Direct Application of Geothermal Energy . . . . . . . . .Reservoir Assessment: Geothermal Fluid Injection, ReservoirD. E. Appendix Small Geothermal Power Plants . . . . . . .

  19. The Future of Geothermal Energy

    E-Print Network [OSTI]

    Ito, Garrett

    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

  20. Texas: basic data for thermal springs and wells as recorded in GEOTHERM

    SciTech Connect (OSTI)

    Bliss, J.D.

    1983-07-01

    This compilation identities all locations of potential source of geothermal fluids in Texas available as of December 1981. 7 refs. (ACR)

  1. Reference book on geothermal direct use

    SciTech Connect (OSTI)

    Lienau, P.J.; Lund, J.W.; Rafferty, K.; Culver, G.

    1994-08-01

    This report presents the direct uses of geothermal energy in the United States. Topics discussed include: low-temperature geothermal energy resources; energy reserves; geothermal heat pumps; geothermal energy for residential buildings; and geothermal energy for industrial usage.

  2. Abraham Hot Springs Geothermal Area Northern Basin and Range...

    Open Energy Info (EERE)

    Basin and Range Geothermal Region Medical Hot Springs Geothermal Area Idaho Batholith Medicine Lake Geothermal Area Cascades Melozi Hot Springs Geothermal Area Alaska Geothermal...

  3. Boise geothermal district heating system

    SciTech Connect (OSTI)

    Hanson, P.J.

    1985-10-01

    This document describes the Boise geothermal district heating project from preliminary feasibility studies completed in 1979 to a fully operational system by 1983. The report includes information about the two local governments that participated in the project - the City of Boise, Idaho and the Boise Warm Springs Water District. It also discusses the federal funding sources; the financial studies; the feasibility studies conducted; the general system planning and design; design of detailed system components; the legal issues involved in production; geological analysis of the resource area; distribution and disposal; the program to market system services; and the methods of retrofitting buildings to use geothermal hot water for space heating. Technically this report describes the Boise City district heating system based on 170/sup 0/F water, a 4000 gpm production system, a 41,000 foot pipeline system, and system economies. Comparable data are also provided for the Boise Warm Springs Water District. 62 figs., 31 tabs.

  4. FRACTURE STIMULATION IN ENHANCED GEOTHERMAL

    E-Print Network [OSTI]

    Stanford University

    FRACTURE STIMULATION IN ENHANCED GEOTHERMAL SYSTEMS A REPORT SUBMITTED TO THE DEPARTMENT OF ENERGY (Principal Advisor) #12;#12;v Abstract Enhanced Geothermal Systems (EGS) are geothermal reservoirs formed

  5. Geothermal Outreach and Project Financing

    SciTech Connect (OSTI)

    Elizabeth Battocletti

    2006-04-06

    The ?Geothermal Outreach and Project Financing? project substantially added to the understanding of geothermal resources, technology, and small business development by both the general public as well as those in the geothermal community.

  6. Great Western Malting Company geothermal project, Pocatello, Idaho. Final report

    SciTech Connect (OSTI)

    Christensen, N.T.; McGeen, M.A.; Corlett, D.F.; Urmston, R.

    1981-12-23

    The Great Western Malting Company recently constructed a barley malting facility in Pocatello, Idaho, designed to produce 6.0 million bushels per year of brewing malt. This facility uses natural gas to supply the energy for germination and kilning processes. The escalating cost of natural gas has prompted the company to look at alternate and more economical sources of energy. Trans Energy Systems has investigated the viabiity of using geothermal energy at the new barley processing plant. Preliminary investigations show that a geothermal resource probably exists, and payback on the installation of a system to utilize the resource will occur in under 2 years. The Great Western Malting plant site has geological characteristics which are similar to areas where productive geothermal wells have been established. Geological investigations indicate that resource water temperatures will be in the 150 to 200/sup 0/F range. Geothermal energy of this quality will supply 30 to 98% of the heating requirements currently supplied by natural gas for this malting plant. Trans Energy Systems has analyzed several systems of utilizing the geothermal resource at the Great Western barley malting facility. These systems included: direct use of geothermal water; geothermal energy heating process water through an intermediary heat exchanger; coal or gas boosted geothermal systems; and heat pump boosted geothermal system. The analysis examined the steps that are required to process the grain.

  7. Geothermal br Resource br Area Geothermal br Resource br Area...

    Open Energy Info (EERE)

    Area Central Nevada Seismic Zone Pull Apart in Strike Slip Fault Zone Ordovician shale quartzite MW K Blue Mountain Geothermal Area Blue Mountain Geothermal Area Northwest...

  8. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    Area Exploration Technique Geothermal Literature Review Activity Date Usefulness useful DOE-funding Unknown Exploration Basis examining known geothermal sites in New Mexico Notes...

  9. DOE Awards $20 Million to Develop Geothermal Power Technologies...

    Energy Savers [EERE]

    fluid will then be used as the heat source for a heating system, a greenhouse, and a fish farm. This "cascading" use of the geothermal resource is meant to improve the economics...

  10. Trace Element Analysis At Long Valley Caldera Geothermal Area...

    Open Energy Info (EERE)

    Activity Date - 1979 Usefulness useful DOE-funding Unknown Exploration Basis A1-horizon soil samples collected in the vicinity of the resurgent dome and a known geothermal source...

  11. Mercury Vapor At Long Valley Caldera Geothermal Area (Klusman...

    Open Energy Info (EERE)

    Activity Date - 1979 Usefulness useful DOE-funding Unknown Exploration Basis A1-horizon soil samples collected in the vicinity of the resurgent dome and a known geothermal source...

  12. Optimal design of ground source heat pump system integrated with phase change cooling storage tank in an office building 

    E-Print Network [OSTI]

    Zhu, N.

    2014-01-01

    source heat pump system integrated with phase change cooling storage tank in an office building Dr. Na Zhu Department of Building Environment and Energy Engineering Huazhong University of Science & Technology, Wuhan, China 2014-09-14 ESL-IC-14-09-18a...-conditioning system: ?Splitting air-conditioner for cooling and coal fired boiler for heating. • Problems: a)Energy efficiency is low b)This system is not environmental friendly 2014/11/11 New energy saving technology ESL-IC-14-09-18a Proceedings of the 14th...

  13. Geothermal Technologies Program: Enhanced Geothermal Systems

    SciTech Connect (OSTI)

    Not Available

    2004-08-01

    This general publication describes enhanced geothermal systems (EGS) and the principles of operation. It also describes the DOE program R&D efforts in this area, and summarizes several projects using EGS technology.

  14. Applicability of Related Data, Algorithms, and Models to the Simulation of Ground-Coupled Residential Hot Water Piping in California

    E-Print Network [OSTI]

    Warner, J.L.

    2009-01-01

    Length Design for Ground Source Heat Pumps. ” InternationalClosed-Loop/Ground-Source Heat Pump Systems Installationon Closed-Loop Ground-Source Heat Pump Systems. ” ASHRAE

  15. Geothermal Today - 1999

    SciTech Connect (OSTI)

    2000-05-01

    U.S. Department of Energy 1999 Geothermal Energy Program Highlights The Hot Facts Getting into Hot Water Turning Waste water into Clean Energy Producing Even Cleaner Power Drilling Faster and Cheaper Program in Review 1999: The Year in Review JanuaryCal Energy announced sale of Coso geothermal power plants at China Lake, California, to Caithness Energy, for $277 million. U.S. Export-Import Bank completed a $50 million refinancing of the Leyte Geothermal Optimization Project in the Philippines. F

  16. Exergy Analysis and Operational Efficiency of a Horizontal Ground Source Heat Pump System Operated in a Low-Energy Test House under Simulated Occupancy Conditions

    SciTech Connect (OSTI)

    Ally, Moonis Raza [ORNL; Baxter, Van D [ORNL; Munk, Jeffrey D [ORNL; Gehl, Anthony C [ORNL

    2012-01-01

    This paper presents data, analyses, measures of performance, and conclusions for a ground-source heat pump (GSHP) providing space conditioning to a 345m2 house whose envelope is made of structural insulated panels (SIP). The entire thermal load of this SIP house with RSI-3.7 (RUS-21) walls, triple pane windows with a U-factor of 1.64 W/m2 K (0.29 Btu/h ft2 oF) and solar heat gain coefficient (SHGC) of 0.25, a roof assembly with overall thermal resistance of about RSI-8.8 (RUS-50) and low leakage rates of 0.74 ACH at 50Pa was satisfied with a 2.16-Ton (7.56 kW) GSHP unit consuming negligible (9.83kWh) auxiliary heat during peak winter season. The highest and lowest heating COP achieved was 4.90 (October) and 3.44 (February), respectively. The highest and lowest cooling COP achieved was 6.09 (April) and 3.88 (August). These COPs are calculated on the basis of the total power input (including duct, ground loop, and control power losses ). The second Law (Exergy) analysis provides deep insight into how systemic inefficiencies are distributed among the various GSHP components. Opportunities for design and further performance improvements are identified. Through Exergy analysis we provide a true measure of how closely actual performance approaches the ideal, and it unequivocally identifies, better than energy analysis does, the sources and causes of lost work, the root cause of system inefficiencies.

  17. Residential Vertical Geothermal Heat Pump System Models: Calibration to Data:

    SciTech Connect (OSTI)

    Thornton, Jeff W.; McDowell, T. P.; Shonder, John A; Hughes, Patrick; Pahud, D.; Hellstrom, G.

    1997-06-01

    A detailed component-based simulation model of a geothermal heat pump system has been calibrated to monitored data taken from a family housing unit located at Fort Polk, Louisiana. The simulation model represents the housing unit, geothermal heat pump, ground heat exchanger, thermostat, blower, and ground-loop pump. Each of these component models was 'tuned' to better match the measured data from the site. These tuned models were then interconnect to form the system model. The system model was then exercised in order to demonatrate its capabilities.

  18. Residential vertical geothermal heat pump system models: Calibration to data

    SciTech Connect (OSTI)

    Thornton, J.W.; McDowell, T.P.; Shonder, J.A.; Hughes, P.J.; Pahud, D.; Hellstroem, G.A.J.

    1997-12-31

    A detailed component-based simulation model of a geothermal heat pump system has been calibrated to monitored data taken from a family housing unit located at Fort Polk, Louisiana. The simulation model represents the housing unit, geothermal heat pump, ground heat exchanger, thermostat, blower, and ground-loop pump. Each of these component models was tuned to better match the measured data from the site. These tuned models were then interconnected to form the system model. The system model was then exercised in order to demonstrate its capabilities.

  19. Role of the terrestrial subsurface in shaping geothermal spring microbial communitiesemi4_248 491..499

    E-Print Network [OSTI]

    Kelley, Scott

    Role of the terrestrial subsurface in shaping geothermal spring microbial communitiesemi4_248 491 the possibility that dis- persal from terrestrial subsurface sources `seeds' the development of geothermal spring a phylogenetic group of uncultured Firmi- cutes never before reported in geothermal habitats that were closely

  20. Geothermal Life Cycle Calculator

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Sullivan, John

    2014-03-11

    This calculator is a handy tool for interested parties to estimate two key life cycle metrics, fossil energy consumption (Etot) and greenhouse gas emission (ghgtot) ratios, for geothermal electric power production. It is based solely on data developed by Argonne National Laboratory for DOE’s Geothermal Technologies office. The calculator permits the user to explore the impact of a range of key geothermal power production parameters, including plant capacity, lifetime, capacity factor, geothermal technology, well numbers and depths, field exploration, and others on the two metrics just mentioned. Estimates of variations in the results are also available to the user.

  1. Geothermal Life Cycle Calculator

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Sullivan, John

    This calculator is a handy tool for interested parties to estimate two key life cycle metrics, fossil energy consumption (Etot) and greenhouse gas emission (ghgtot) ratios, for geothermal electric power production. It is based solely on data developed by Argonne National Laboratory for DOE’s Geothermal Technologies office. The calculator permits the user to explore the impact of a range of key geothermal power production parameters, including plant capacity, lifetime, capacity factor, geothermal technology, well numbers and depths, field exploration, and others on the two metrics just mentioned. Estimates of variations in the results are also available to the user.

  2. National Laboratory Geothermal Publications

    Broader source: Energy.gov [DOE]

    You can find publications, including technical papers and reports, about geothermal technologies, research, and development at the following U.S. Department of Energy national laboratories.

  3. Geothermal Outreach Publications

    Broader source: Energy.gov [DOE]

    Here you'll find the U.S. Department of Energy's (DOE) most recent outreach publications about geothermal technologies, research, and development.

  4. Geothermal Reservoir Dynamics - TOUGHREACT

    E-Print Network [OSTI]

    2005-01-01

    enhanced geothermal systems (EGS) and hot dry rock (HDR),deformation, to demonstrate new EGS technology through fieldsystems, primarily focusing on EGS and HDR systems and on

  5. Geothermal Heat Pumps

    Broader source: Energy.gov [DOE]

    Geothermal heat pumps are expensive to install but pay for themselves over time in reduced heating and cooling costs. Find out if one is right for your home.

  6. Pre-Shot Simulations of Far-Field Ground Motions for the Source Physics Experiment (SPE) Explosions at the Climax Stock, Nevada National Security Site

    SciTech Connect (OSTI)

    Rodgers, A J; Wagoner, J; Petersson, N A; Sjogreen, B

    2010-11-07

    The Source Physics Experiment (SPE) will involve a series of explosions in various geologic and emplacement conditions to validate numerical simulation methods to predict behavior of seismic wave excitation and propagation for nuclear test monitoring. The first SPE's currently underway involve explosions in the Climax Stock (granitic geology) at the Nevada National Security Site (NNSS). Detailed geologic data and published material properties for the major lithologic units of the NNSS and surrounding region were used to build three-dimensional models for seismic wave propagation simulations. The geologic structure near the SPE shot point is quite varied including granitic, carbonate, tuff and alluvium lithologies. We performed preliminary ground motion simulations for a near-source domain covering 8 km x 8 km at the surface centered on the shot point to investigate various source and propagation effects using WPP, LLNL's anelastic seismic wave finite difference code. Simulations indicate that variations in wave propagation properties of the sub-surface will generate strongly path-dependent response once the energy has left the relatively small granitic geology of the near-surface Climax Stock near the SPE shot point. Rough topography to the north and west of SPE shot point causes additional complexity in the signals including energy on the transverse components. Waves propagate much faster through the granitic and carbonate formations and slower through the tuff and alluvium. Synthetic seismograms for a pure explosion source in a 3D geologic structure show large amplitudes on transverse component. For paths to the south sampling the granite, tuff and alluvium lithologies transverse component amplitudes are as high as 50% of that on the vertical and radial components.

  7. Geothermal progress monitor: Report No. 10

    SciTech Connect (OSTI)

    Not Available

    1987-07-01

    This issue synthesizes information on all aspects of geothermal development in this country and abroad to permit identification and quantification of trends in the use of this source of energy. The contents include: (1) the Federal Beat; (2) The Industry Scene; (3) Financing; (4) Development Status; (5) Leasing and Drilling; (6) State and Local; (7) International; and (8) Technology Transfer. (ACR)

  8. Modeling of Standing Column Wells in Ground Source Heat Pump Systems Zheng Deng O'Neill, Ph.D., P.E.

    E-Print Network [OSTI]

    ). Standing column wells have been in use in limited numbers since the advent of geothermal heat pump systems exchanger in such systems consists of a vertical borehole that is filled with groundwater up to the level, shorter borehole depths and more stable water temperatures make the SCW system an attractive commercial

  9. Interactive Maps from the Great Basin Center for Geothermal Energy

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The Great Basin Center for Geothermal Energy, part of the University of Nevada, Reno, conducts research towards the establishment of geothermal energy as an economically viable energy source within the Great Basin. The Center specializes in collecting and synthesizing geologic, geochemical, geodetic, geophysical, and tectonic data, and using Geographic Information System (GIS) technology to view and analyze this data and to produce favorability maps of geothermal potential. The interactive maps are built with layers of spatial data that are also available as direct file downloads (see DDE00299). The maps allow analysis of these many layers, with various data sets turned on or off, for determining potential areas that would be favorable for geothermal drilling or other activity. They provide information on current exploration projects and leases, Bureau of Land Management land status, and map presentation of each type of scientific spatial data: geothermal, geophysical, geologic, geodetic, groundwater, and geochemical.

  10. Federal Geothermal Research Program Update Fiscal Year 1998

    SciTech Connect (OSTI)

    Keller, J.G.

    1999-05-01

    This report reviews the specific objectives, status, and accomplishments of DOE's Geothermal Research Program for Fiscal Year 1998. The Exploration Technology research area focuses on developing instruments and techniques to discover hidden hydrothermal systems and to expose the deep portions of known systems. The Reservoir Technology research combines laboratory and analytical investigations with equipment development and field testing to establish practical tools for resource development and management for both hydrothermal and hot dry rock reservoirs. The Drilling Technology projects focus on developing improved, economic drilling and completion technology for geothermal wells. The Conversion Technology research focuses on reducing costs and improving binary conversion cycle efficiency, to permit greater use of the more abundant moderate-temperature geothermal resource, and on the development of materials that will improve the operating characteristics of many types of geothermal energy equipment. Direct use research covers the direct use of geothermal energy sources for applications in other than electrical production.

  11. Pre-shot simulations of far-field ground motion for the Source Physics Experiment (SPE) Explosions at the Climax Stock, Nevada National Security Site: SPE2

    SciTech Connect (OSTI)

    Mellors, R J; Rodgers, A; Walter, W; Ford, S; Xu, H; Matzel, E; Myers, S; Petersson, N A; Sjogreen, B; Hauk, T; Wagoner, J

    2011-10-18

    The Source Physics Experiment (SPE) is planning a 1000 kg (TNT equivalent) shot (SPE2) at the Nevada National Security Site (NNSS) in a granite borehole at a depth (canister centroid) of 45 meters. This shot follows an earlier shot of 100 kg in the same borehole at a depth 60 m. Surrounding the shotpoint is an extensive array of seismic sensors arrayed in 5 radial lines extending out 2 km to the north and east and approximately 10-15 to the south and west. Prior to SPE1, simulations using a finite difference code and a 3D numerical model based on the geologic setting were conducted, which predicted higher amplitudes to the south and east in the alluvium of Yucca Flat along with significant energy on the transverse components caused by scattering within the 3D volume along with some contribution by topographic scattering. Observations from the SPE1 shot largely confirmed these predictions although the ratio of transverse energy relative to the vertical and radial components was in general larger than predicted. A new set of simulations has been conducted for the upcoming SPE2 shot. These include improvements to the velocity model based on SPE1 observations as well as new capabilities added to the simulation code. The most significant is the addition of a new source model within the finite difference code by using the predicted ground velocities from a hydrodynamic code (GEODYN) as driving condition on the boundaries of a cube embedded within WPP which provides a more sophisticated source modeling capability linked directly to source site materials (e.g. granite) and type and size of source. Two sets of SPE2 simulations are conducted, one with a GEODYN source and 3D complex media (no topography node spacing of 5 m) and one with a standard isotropic pre-defined time function (3D complex media with topography, node spacing of 5 m). Results were provided as time series at specific points corresponding to sensor locations for both translational (x,y,z) and rotational components. Estimates of spectral scaling for SPE2 are provided using a modified version of the Mueller-Murphy model. An estimate of expected aftershock probabilities were also provided, based on the methodology of Ford and Walter, [2010].

  12. Fairbanks Geothermal Energy Project Final Report

    SciTech Connect (OSTI)

    Karl, Bernie

    2013-05-31

    The primary objective for the Fairbanks Geothermal Energy Project is to provide another source of base-load renewable energy in the Fairbanks North Star Borough (FNSB). To accomplish this, Chena Hot Springs Resort (Chena) drilled a re-injection well to 2700 feet and a production well to 2500 feet. The re-injection well allows a greater flow of water to directly replace the water removed from the warmest fractures in the geothermal reservoir. The new production will provide access to warmer temperature water in greater quantities.

  13. A Technical Databook for Geothermal Energy Utilization

    E-Print Network [OSTI]

    Phillips, S.L.

    1981-01-01

    A TECHNICAL DATABOOK FOR GEOTHERMAL ENERGY UTILIZATION S.L.Technical Databook for Geothermal Energy Utilization* s. L.Survey, Menlo Park, CA. Geothermal Energy Development, CA.

  14. SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL

    E-Print Network [OSTI]

    Narasimhan, T.N.

    2013-01-01

    the potential use of geothermal energy for power generation47. Boldizsar, T. , 1970, "Geothermal energy production fromCoast Geopressure Geothermal Energy Conference, M.H. Dorfman

  15. NATIONAL GEOTHERMAL INFORMATION RESOURCE ANNUAL REPORT, 1977

    E-Print Network [OSTI]

    Phillips, Sidney L.

    2012-01-01

    an International Geothermal Energy Comnuni ty", J .C.environmental aspects of geothermal energy which provide theby GRID for geothermal energy have wider applications. In

  16. ANNOTATED RESEARCH BIBLIOGRAPHY FOR GEOTHERMAL RESERVOIR ENGINEERING

    E-Print Network [OSTI]

    Sudo!, G.A

    2012-01-01

    I 2nd Geopressured Geothermal Energy Conference. UniversityExperiment t o Extract Geothermal Energy From Hot Dry Rock."2nd Geo- pressured Geothermal Energy Conference, Austin,

  17. Induced seismicity associated with enhanced geothermal system

    E-Print Network [OSTI]

    Majer, Ernest L.

    2006-01-01

    Cooper Basin, Australia. Geothermal Resources Council Trans.a hot fractured rock geothermal project. Engineering Geologyseismicity in The Geysers geothermal area, California. J.

  18. SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL

    E-Print Network [OSTI]

    Narasimhan, T.N.

    2013-01-01

    on the Cerro Prieto Geothermal Field, Baja California,monitoring at the Geysers Geothermal Field, California,~~W. and Faust, C. R. , 1979, Geothermal resource simulation:

  19. NORTHERN NEVADA GEOTHERMAL EXPLORATION STRATEGY ANALYSIS

    E-Print Network [OSTI]

    Goldstein, N.E.

    2011-01-01

    School of Mines Nevada Geothermal Study: Report No. 4, Feb.J. , 1976, Assessing the geothermal resource base of the1977, Microseisms in geothermal Studies in Grass Valley,

  20. ANALYSIS OF PRODUCTION DECLINE IN GEOTHERMAL RESERVOIRS

    E-Print Network [OSTI]

    Zais, E.J.; Bodvarsson, G.

    2008-01-01

    Petroleum Reservoirs. Geothermal Reservoirs IV. DATA1970, Superheating of Geothermal Steam, Proc. of the U.N.the Development & Utilization of Geothermal Resources, Pisa.

  1. GEOTHERMAL RESERVOIR SIMULATIONS WITH SHAFT79

    E-Print Network [OSTI]

    Pruess, Karsten

    2012-01-01

    that well blocks must geothermal reservoir s·tudies, paperof Califomia. LBL-10066 GEOTHERMAL RESERVOIR SIMULATIONSbe presented at the Fifth Geothermal Reservoir Engineering

  2. Nevada/Geothermal | Open Energy Information

    Open Energy Info (EERE)

    Confirmation Silver Peak Geothermal Area Walker-Lane Transition Zone Geothermal Region Smith Creek Geothermal Project Ormat Phase I - Resource Procurement and Identification Smith...

  3. ANNOTATED RESEARCH BIBLIOGRAPHY FOR GEOTHERMAL RESERVOIR ENGINEERING

    E-Print Network [OSTI]

    Sudo!, G.A

    2012-01-01

    characteristics of geothermal boreholes are studied.Maini, Tidu. "Geothermal Energy From a Borehole i n H o t28 (1967): Borehole Temperature Survey Analysis Geothermal

  4. SEISMOLOGICAL INVESTIGATIONS AT THE GEYSERS GEOTHERMAL FIELD

    E-Print Network [OSTI]

    Majer, E. L.

    2011-01-01

    of the Salton Sea Geothermal System. pp. 129-166. Hubbert,and Lardarello: Geothermal Power Systems New Zealand Journalthe western edge of the geothermal system. Attenuation In

  5. SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL

    E-Print Network [OSTI]

    Narasimhan, T.N.

    2013-01-01

    is a vapor dominated geothermal system and is the largestin liquid-dominated geothermal systems, 11 Proceedings,histories relating to geothermal systems from around the

  6. 2015 Peer Review Presentations | Geothermal Energy | Department...

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

    2015 Peer Review Presentations | Geothermal Energy 2015 Peer Review Presentations | Geothermal Energy The Energy Department featured Play Fairway Analysis at the 2015 Geothermal...

  7. Oregon/Geothermal | Open Energy Information

    Open Energy Info (EERE)

    Phase III - Permitting and Initial Development Neal Hot Springs Geothermal Area Snake River Plain Neal Hot Springs II Geothermal Project U.S. Geothermal Vale, Oregon Phase I -...

  8. Geothermal Food Processors Agricultural Drying Low Temperature...

    Open Energy Info (EERE)

    Geothermal Food Processors Agricultural Drying Low Temperature Geothermal Facility Jump to: navigation, search Name Geothermal Food Processors Agricultural Drying Low Temperature...

  9. Induced seismicity associated with enhanced geothermal system

    E-Print Network [OSTI]

    Majer, Ernest L.

    2006-01-01

    The deep EGS (Enhanced Geothermal System) project at Soultz-associated with enhanced geothermal systems. Geothermalfor a long-lived enhanced geothermal system (EGS) in the

  10. Geothermal Progress Monitor, report No. 13

    SciTech Connect (OSTI)

    Not Available

    1992-02-01

    Geothermal Progress Monitor (GPM) Issue No. 13 documents that most related factors favor the growth and geographic expansion of the US geothermal industry and that the industry is being technologically prepared to meet those challenges into the next century. It is the function of GPM to identify trends in the use of this resource and to provide a historical record of its development pathway. The information assembled for this issue of GPM indicates that trends in the use of geothermal energy in this country and abroad continue to be very positive. Favorable sentiments as well as pertinent actions on the part of both government and industry are documented in almost every section. The FEDERAL BEAT points up that the National Energy Strategy (NES) developed at the highest levels of the US government recognizes the environmental and energy security advantages of renewable energy, including geothermal, and makes a commitment to substantial diversification'' of US sources of energy. With the announcement of the construction of several new plants and plant expansions, the INDUSTRY SCENE illustrates industry's continued expectation tha the use of geothermal energy will prove profitable to investors. In DEVELOPMENT STATUS, spokesmen for both an investor-owned utility and a major geothermal developer express strong support for geothermal power, particularly emphasizing its environmental advantages. DEVELOPMENT STATUS also reports that early successes have been achieved by joint DOE/industry R D at The Geysers which will have important impacts on the future management of this mature field. Also there is increasing interest in hot dry rock. Analyses conducted in support of the NES indicate that if all the postulated technology developments occur in this field, the price of energy derived from hot dry rock in the US could drop.

  11. Temperature, Temperature, Earth, geotherm for

    E-Print Network [OSTI]

    Treiman, Allan H.

    Temperature, Temperature, Earth, geotherm for total global heat flow Venus, geotherm for total global heat flow, 500 Ma #12;Temperature, Temperature, #12;Earth's modern regional continental geotherms Venusian Geotherms, 500 Ma Temperature, Temperature, After Blatt, Tracy, and Owens Petrology #12;Ca2Mg5Si8

  12. STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY

    E-Print Network [OSTI]

    Stanford University

    STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY STANFORD, CALIFORNIA 34105 Stanford Geothermal, California SGP-TR-72 A RESERVOIR ENGINEERING ANALYSIS OF A VAPOR-DOMINATED GEOTHERMAL FIELD BY John Forrest Dee June 1983 Financial support was provided through the Stanford Geothermal Program under Department

  13. STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY

    E-Print Network [OSTI]

    Stanford University

    STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY Stanford Geothermal Program Interdisciplinary was provided through the Stanford Geothermal Program under Department of Energy Contract No. DE-AT03-80SF11459 heat sweep model for estimating energy recovery from fractured geothermal reservoirs based on early

  14. STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY

    E-Print Network [OSTI]

    Stanford University

    through September 30, 1982. The Stanford Geothermal Program conducts interdisciplinary research in the geothermal industry. In the first 10 years of the Program about 50 graduates have been trained in geotherSTANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY STANFORD, CALIFORNIA 94105 SGP-TR- 61 GEOTHERMAL

  15. Analysis of Low-Temperature Utilization of Geothermal Resources

    SciTech Connect (OSTI)

    Anderson, Brian

    2015-06-30

    Full realization of the potential of what might be considered “low-grade” geothermal resources will require that we examine many more uses for the heat than traditional electricity generation. To demonstrate that geothermal energy truly has the potential to be a national energy source we will be designing, assessing, and evaluating innovative uses for geothermal-produced water such as hybrid biomass-geothermal cogeneration of electricity and district heating and efficiency improvements to the use of cellulosic biomass in addition to utilization of geothermal in district heating for community redevelopment projects. The objectives of this project were: 1) to perform a techno-economic analysis of the integration and utilization potential of low-temperature geothermal sources. Innovative uses of low-enthalpy geothermal water were designed and examined for their ability to offset fossil fuels and decrease CO2 emissions. 2) To perform process optimizations and economic analyses of processes that can utilize low-temperature geothermal fluids. These processes included electricity generation using biomass and district heating systems. 3) To scale up and generalize the results of three case study locations to develop a regionalized model of the utilization of low-temperature geothermal resources. A national-level, GIS-based, low-temperature geothermal resource supply model was developed and used to develop a series of national supply curves. We performed an in-depth analysis of the low-temperature geothermal resources that dominate the eastern half of the United States. The final products of this study include 17 publications, an updated version of the cost estimation software GEOPHIRES, and direct-use supply curves for low-temperature utilization of geothermal resources. The supply curves for direct use geothermal include utilization from known hydrothermal, undiscovered hydrothermal, and near-hydrothermal EGS resources and presented these results at the Stanford Geothermal Workshop. We also have incorporated our wellbore model into TOUGH2-EGS and began coding TOUGH2-EGS with the wellbore model into GEOPHIRES as a reservoir thermal drawdown option. Additionally, case studies for the WVU and Cornell campuses were performed to assess the potential for district heating and cooling at these two eastern U.S. sites.

  16. Application of (U-Th)/He thermochronometry as a geothermal exploration tool in extensional tectonic settings: the Wassuk Range, Hawthorne, Nevada

    E-Print Network [OSTI]

    Gorynski, Kyle; Stockli, Daniel F.; Walker, J. Douglas; Sabin, Andrew

    2010-01-01

    shows a significant geographical correlation with the Hawthorne geothermal anomaly. Exploration for geothermal resources is expensive as it often requires the drilling of geo- thermal test holes to locate heat sources. This is especially true... shows a significant geographical correlation with the Hawthorne geothermal anomaly. Exploration for geothermal resources is expensive as it often requires the drilling of geo- thermal test holes to locate heat sources. This is especially true...

  17. Geothermal energy planning and communication for native Americans. Final report. Draft

    SciTech Connect (OSTI)

    Robertson, T.A.

    1982-03-30

    The purpose was to explore and develop geothermal energy resources on Indian lands. Activities included the following: (1) continued review of Indian communities and their potential for geothermal energy development; (2) introduced tribes to the availability of geothermal energy and removed the barriers to the implementation of this energy source; (3) provided information by telephone and by mailing packages of information; (4) published articles on geothermal energy development in the UIPA newsletter and supplied articles to other Indian publication; (5) conducted two seminars specific to geothermal energy development on Indian lands in western states; (6) carried out survey of Indian attitudes and opinions toward energy in general and geothermal energy in specific; (7) incorporated geothermal energy development information in Economic Development Administration sponsored tribal government management programs, and (8) developed draft written material addressing Indian planning problems and supporting their ability to affect a more productive working relationship with government agencies and reduced dependency.

  18. Geothermal Heat Pump research and development studies at Sandia National Laboratories

    SciTech Connect (OSTI)

    Martinez, G.M.; Sullivan, W.N.

    1994-08-01

    The Geothermal Heat Pump (GHP) concept was originally developed in the 1940`s. Recently, because of increasing energy costs, utility interest, and the development of simple and durable ground source heat exchangers, GHP`s have gained international attention as a proven means of energy conservation and electrical peak power demand reduction. GHP systems require installation of a buried heat exchanger to utilize the nearly constant ground temperature making them more efficient than conventional air source heat pumps. However, the high installation cost for both residential and commercial applications is a major obstacle to their market penetration. Sandia National Laboratories (SNL) through its sponsors, the Department of Energy (DOE), and the Department of Defense (DOD), has embarked on a research program to find ways to reduce GHP installation costs and improve performance, thereby increasing their market penetration. The major elements of the program are: data acquisition to quantify the performance of GHP`S, research and development (R&D) of the ground source heat exchanger aimed at reducing, installation costs, and support of DOE efforts to market the GHP concept. This paper describes the current status of our program, some experimental and analytical results, and plans for future activities.

  19. Advanced Geothermal Turbodrill

    SciTech Connect (OSTI)

    W. C. Maurer

    2000-05-01

    Approximately 50% of the cost of a new geothermal power plant is in the wells that must be drilled. Compared to the majority of oil and gas wells, geothermal wells are more difficult and costly to drill for several reasons. First, most U.S. geothermal resources consist of hot, hard crystalline rock formations which drill much slower than the relatively soft sedimentary formations associated with most oil and gas production. Second, high downhole temperatures can greatly shorten equipment life or preclude the use of some technologies altogether. Third, producing viable levels of electricity from geothermal fields requires the use of large diameter bores and a high degree of fluid communication, both of which increase drilling and completion costs. Optimizing fluid communication often requires creation of a directional well to intersect the best and largest number of fracture capable of producing hot geothermal fluids. Moineau motor stators made with elastomers cannot operate at geothermal temperatures, so they are limited to the upper portion of the hole. To overcome these limitations, Maurer Engineering Inc. (MEI) has developed a turbodrill that does not use elastomers and therefore can operate at geothermal temperatures. This new turbodrill uses a special gear assembly to reduce the output speed, thus allowing a larger range of bit types, especially tri-cone roller bits, which are the bits of choice for drilling hard crystalline formations. The Advanced Geothermal Turbodrill (AGT) represents a significant improvement for drilling geothermal wells and has the potential to significantly reduce drilling costs while increasing production, thereby making geothermal energy less expensive and better able to compete with fossil fuels. The final field test of the AGT will prepare the tool for successful commercialization.

  20. NANA Geothermal Assessment Program Final Report

    SciTech Connect (OSTI)

    Jay Hermanson

    2010-06-22

    In 2008, NANA Regional Corporation (NRC) assessed geothermal energy potential in the NANA region for both heat and/or electricity production. The Geothermal Assessment Project (GAP) was a systematic process that looked at community resources and the community's capacity and desire to develop these resources. In October 2007, the US Department of Energy's Tribal Energy Program awarded grant DE-FG36-07GO17075 to NRC for the GAP studies. Two moderately remote sites in the NANA region were judged to have the most potential for geothermal development: (1) Granite Mountain, about 40 miles south of Buckland, and (2) the Division Hot Springs area in the Purcell Mountains, about 40 miles south of Shungnak and Kobuk. Data were collected on-site at Granite Mountain Hot Springs in September 2009, and at Division Hot Springs in April 2010. Although both target geothermal areas could be further investigated with a variety of exploration techniques such as a remote sensing study, a soil geochemical study, or ground-based geophysical surveys, it was recommended that on-site or direct heat use development options are more attractive at this time, rather than investigations aimed more at electric power generation.

  1. Interagency Geothermal Coordinating Council fifth annual report. Final draft

    SciTech Connect (OSTI)

    Abel, Fred H.

    1981-07-07

    Geothermal energy is the natural heat of the earth, and can be tapped as a clean, safe, economical alternative source of energy. Much of the geothermal energy resource is recoverable with current or near-current technology and could make a significant contribution both to increasing domestic energy supplies and to reducing the US dependence on imported oil. Geothermal energy can be used for electric power production, residential and commercial space heating and cooling, industrial process heat, and agricultural process applications. This report describes the progress for fiscal year 1980 (FY80) of the Federal Geothermal Program. It also summarizes the goals, strategy, and plans which form the basis for the FY81 and FY82 program activities and reflects the recent change in national policy affecting Federal research, development and demonstration programs. The Interagency Geothermal Coordinating Council (IGCC) believes that substantial progress can and will be made in the development of geothermal energy. The IGCC goals are: (1) reduce the institutional barriers so that geothermal projects can be on-line in one-half the current time; (2) make moderate temperature resources an economically competitive source of electricity; (3) remove the backlog of noncompetitive lease applications; (4) competitive lease all KGRA lands; and (5) cut the cost of hydrothermal technology by 25%.

  2. Updating the Classification of Geothermal Resources- Presentation

    Office of Energy Efficiency and Renewable Energy (EERE)

    USGS is working with DOE, the geothermal industry, and academic partners to develop a new geothermal resource classification system.

  3. Ionic Liquids for Utilization of Geothermal Energy

    Broader source: Energy.gov [DOE]

    DOE Geothermal Program Peer Review 2010 - Presentation. Project objective: to develop ionic liquids for two geothermal energy related applications.

  4. National Geothermal Resource Assessment and Classification |...

    Office of Environmental Management (EM)

    Resource Assessment and Classification National Geothermal Resource Assessment and Classification National Geothermal Resource Assessment and Classification presentation at the...

  5. Rural Cooperative Geothermal Development Electric & Agriculture...

    Broader source: Energy.gov (indexed) [DOE]

    More Documents & Publications Southwest Alaska Regional Geothermal Energy Project District Wide Geothermal Heating Conversion Blaine County School District Novel Energy...

  6. Updating the Classification of Geothermal Resources

    Office of Energy Efficiency and Renewable Energy (EERE)

    USGS is working with DOE, the geothermal industry, and academic partners to develop a new geothermal resource classification system.

  7. GIS Regional Spatial Data from the Great Basin Center for Geothermal Energy: Geochemical, Geodesic, Geologic, Geophysical, Geothermal, and Groundwater Data

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The Great Basin Center for Geothermal Energy, part of the University of Nevada, Reno, conducts research towards the establishment of geothermal energy as an economically viable energy source within the Great Basin. The Center specializes in collecting and synthesizing geologic, geochemical, geodetic, geophysical, and tectonic data, and using Geographic Information System (GIS) technology to view and analyze this data and to produce favorability maps of geothermal potential. The center also makes its collections of spatial data available for direct download to the public. Data are in Lambert Conformable Conic Projection.

  8. Navy Geothermal Plan

    SciTech Connect (OSTI)

    Not Available

    1984-12-01

    Domestic geothermal resources with the potential for decreasing fossil fuel use and energy cost exist at a significant number of Navy facilities. The Geothermal Plan is part of the Navy Energy R and D Program that will evaluate Navy sites and provide a technical, economic, and environmental base for subsequent resource use. One purpose of the program will be to provide for the transition of R and D funded exploratory efforts into the resource development phase. Individual Navy geothermal site projects are described as well as the organizational structure and Navy decision network. 2 figs.

  9. The Geysers Geothermal Field Update1990/2010

    E-Print Network [OSTI]

    Brophy, P.

    2012-01-01

    in  The  Geysers.   Geothermal Resources Council A  planned  Enhanced  Geothermal  System  demonstration project.   Geothermal  Resources  Council  Transactions 33, 

  10. GEOTHERMAL RESERVOIR ENGINEERING MANGEMENT PROGRAM PLAN (GREMP PLAN)

    E-Print Network [OSTI]

    Bloomster, C.H.

    2010-01-01

    2 Mission of Division of Geothermal Energy . . . . .Coordination with Other Geothermal Programs . . . . . . 6the Behavior of Geothermal Systems . . . . . . . . . 1 6

  11. Microhole arrays for improved heat mining from enhanced geothermal systems

    E-Print Network [OSTI]

    Finsterle, S.

    2014-01-01

    from enhanced geothermal systems. Transactions Geothermalapproach to enhanced geothermal systems. Transactionsof the enhanced geothermal system demonstration reservoir in

  12. National Geothermal Academy Underway at University of Nevada...

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

    aspects of geothermal energy development and utilization. Modules include Geothermal Geology and Geochemistry, Geothermal Geophysics, Reservoir Engineering, and more. The...

  13. Exploring the Raft River geothermal area, Idaho, with the dc...

    Open Energy Info (EERE)

    the dc resistivity method (Abstract) Abstract GEOTHERMAL ENERGY; GEOTHERMAL FIELDS; ELECTRICAL SURVEYS; IDAHO; GEOTHERMAL EXPLORATION; RAFT RIVER VALLEY; ELECTRIC CONDUCTIVITY;...

  14. Geothermal Energy Production with Co-produced and Geopressured...

    Energy Savers [EERE]

    Projects Poster Geothermal Home About the Geothermal Technologies Office Enhanced Geothermal Systems Hydrothermal Resources Low-Temperature & Coproduced Resources Systems...

  15. Microhole arrays for improved heat mining from enhanced geothermal systems

    E-Print Network [OSTI]

    Finsterle, S.

    2014-01-01

    prospects from enhanced geothermal systems. Transactionsapproach to enhanced geothermal systems. Transactionsexperiment of the enhanced geothermal system demonstration

  16. Hot Springs Point Geothermal Project | Open Energy Information

    Open Energy Info (EERE)

    Point Geothermal Project Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Development Project: Hot Springs Point Geothermal Project Project Location Information...

  17. Geothermal energy in the western United States and Hawaii: Resources and projected electricity generation supplies. [Contains glossary and address list of geothermal project developers and owners

    SciTech Connect (OSTI)

    Not Available

    1991-09-01

    Geothermal energy comes from the internal heat of the Earth, and has been continuously exploited for the production of electricity in the United States since 1960. Currently, geothermal power is one of the ready-to-use baseload electricity generating technologies that is competing in the western United States with fossil fuel, nuclear and hydroelectric generation technologies to provide utilities and their customers with a reliable and economic source of electric power. Furthermore, the development of domestic geothermal resources, as an alternative to fossil fuel combustion technologies, has a number of associated environmental benefits. This report serves two functions. First, it provides a description of geothermal technology and a progress report on the commercial status of geothermal electric power generation. Second, it addresses the question of how much electricity might be competitively produced from the geothermal resource base. 19 figs., 15 tabs.

  18. Community Geothermal Technology Program: Bottom heating system using geothermal power for propagation. Final report, Phases 1 and 2

    SciTech Connect (OSTI)

    Downing, J.C.

    1990-01-01

    The objective is to develop and study a bottom-heating system in a greenhouse utilizing geothermal energy to aid germination and speed growth of palms. Source of heat was geothermal brine from HGP-A well. The project was successful; the heat made a dramatic difference with certain varieties, such as Areca catechu (betelnut) with 82% germination with heat, zero without. For other varieties, germination rates were much closer. Quality of seed is important. Tabs, figs.

  19. Ground Water Ground Sky Sky Water Vegetation Ground Vegetation Water

    E-Print Network [OSTI]

    Chen, Tsuhan

    Bear Snow Vegetation RhinoWater Vegetation Ground Water Ground Sky Sky Rhino Water Vegetation Ground Vegetation Water Rhino Water Vegetation Ground Rhino Water Rhino Water Ground Ground Vegetation Water Rhino Vegetation Rhino Vegetation Ground Rhino Vegetation Ground Sky Rhino Vegetation Ground Sky

  20. Seismological investigation of crack formation in hydraulic rock fracturing experiments and in natural geothermal environments. Progress report, September 1, 1979-August 31, 1980

    SciTech Connect (OSTI)

    Aki, K.

    1980-09-01

    Progress is reported in the following research areas: a synthesis of seismic experiments at the Fenton Hill Hot-Dry-Rock System; attenuation of high-frequency shear waves in the lithosphere; a new kinematic source model for deep volcanic tremors; ground motion in the near-field of a fluid-driven crack and its interpretation in the study of shallow volcanic tremor; low-velocity bodies under geothermal areas; and operation of event recorders in Mt. St. Helens and Newberry Peak with preliminary results from them. (MHR)

  1. The Geysers Geothermal Field Update1990/2010

    E-Print Network [OSTI]

    Brophy, P.

    2012-01-01

    into  sustainable  geothermal  energy:  The  S.E.   Geysers seismicity and geothermal  energy.  Geothermal Resources into  sustainable  geothermal  energy:  The  S.E.   Geysers 

  2. 3D Magnetotelluic characterization of the Coso Geothermal Field

    E-Print Network [OSTI]

    Newman, Gregory A.; Hoversten, G. Michael; Wannamaker, Philip E.; Gasperikova, Erika

    2008-01-01

    of the Coso Geothermal System, Geothermal Resources Councileast flank of the Coso geothermal system, Proceedings 28 thCreation of an enhanced geothermal system through hydraulic

  3. How an Enhanced Geothermal System Works | Department of Energy

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    an Enhanced Geothermal System Works How an Enhanced Geothermal System Works The Potential Enhanced Geothermal Systems (EGS), also sometimes called engineered geothermal systems,...

  4. The Geysers Geothermal Field Update1990/2010

    E-Print Network [OSTI]

    Brophy, P.

    2012-01-01

    A  planned  Enhanced  Geothermal  System  demonstration associated  with Enhanced  Geothermal Systems.  Geothermics Section 3).   5. Enhanced Geothermal Systems (EGS)  Brown, 

  5. Recovery act. Development of design and simulation tool for hybrid geothermal heat pump system

    SciTech Connect (OSTI)

    Wang, Shaojie; Ellis, Dan

    2014-05-29

    The ground source heat pump (GSHP) system is one of the most energy efficient HVAC technologies in the current market. However, the heat imbalance may degrade the ability of the ground loop heat exchanger (GLHX) to absorb or reject heat. The hybrid GSHP system, which combines a geothermal well field with a supplemental boiler or cooling tower, can balance the loads imposed on the ground loop heat exchangers to minimize its size while retaining superior energy efficiency. This paper presents a recent simulation-based study with an intention to compare multiple common control strategies used in hybrid GSHP systems, including fixed setpoint, outside air reset, load reset, and wetbulb reset. A small office in Oklahoma City conditioned by a hybrid GSHP system was simulated with the latest version of eQUEST 3.7[1]. The simulation results reveal that the hybrid GSHP system has the excellent capability to meet the cooling and heating setpoints during the occupied hours, balance thermal loads on the ground loop, as well as improve the thermal comfort of the occupants with the undersized well field.

  6. Geothermal Energy: Current abstracts

    SciTech Connect (OSTI)

    Ringe, A.C. (ed.)

    1988-02-01

    This bulletin announces the current worldwide information available on the technologies required for economic recovery of geothermal energy and its use as direct heat or for electric power production. (ACR)

  7. Use of a Geothermal-Solar Hybrid Power Plant to Mitigate Declines in Geothermal Resource Productivity

    SciTech Connect (OSTI)

    Dan Wendt; Greg Mines

    2014-09-01

    Many, if not all, geothermal resources are subject to decreasing productivity manifested in the form of decreasing brine temperature, flow rate, or both during the life span of the associated power generation project. The impacts of resource productivity decline on power plant performance can be significant; a reduction in heat input to a power plant not only decreases the thermal energy available for conversion to electrical power, but also adversely impacts the power plant conversion efficiency. The reduction in power generation is directly correlated to a reduction in revenues from power sales. Further, projects with Power Purchase Agreement (PPA) contracts in place may be subject to significant economic penalties if power generation falls below the default level specified. A potential solution to restoring the performance of a power plant operating from a declining productivity geothermal resource involves the use of solar thermal energy to restore the thermal input to the geothermal power plant. There are numerous technical merits associated with a renewable geothermal-solar hybrid plant in which the two heat sources share a common power block. The geo-solar hybrid plant could provide a better match to typical electrical power demand profiles than a stand-alone geothermal plant. The hybrid plant could also eliminate the stand-alone concentrated solar power plant thermal storage requirement for operation during times of low or no solar insolation. This paper identifies hybrid plant configurations and economic conditions for which solar thermal retrofit of a geothermal power plant could improve project economics. The net present value of the concentrated solar thermal retrofit of an air-cooled binary geothermal plant is presented as functions of both solar collector array cost and electricity sales price.

  8. Geothermal | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center HomeVehicle Replacement U.S.Job VacanciesGeothermal Geothermal EERE

  9. Geothermal | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data CenterFinancial Opportunities FinancialofInformation Geothermal Geothermal

  10. Analysis of Injection-Induced Micro-Earthquakes in a Geothermal Steam Reservoir, The Geysers Geothermal Field, California

    E-Print Network [OSTI]

    Rutqvist, J.

    2008-01-01

    Geothermal Field, Monograph on The Geysers GeothermalField, Geothermal Resources Council, Special Report no. 17,Subsidence at The Geysers geothermal field, N. California

  11. The Krafla Geothermal System. A Review of Geothermal Research...

    Open Energy Info (EERE)

    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...

  12. The National Geothermal Collaborative, EERE-Geothermal Program, Final Report

    SciTech Connect (OSTI)

    Jody Erikson

    2006-05-26

    Summary of the work conducted by the National Geothermal Collaborative (a consensus organization) to identify impediments to geothermal development and catalyze events and dialogues among stakeholders to over those impediments.

  13. Why geothermal energy? Geothermal utilization in the Philippines

    SciTech Connect (OSTI)

    Gazo, F.M.

    1997-12-31

    This paper discusses the advantages of choosing geothermal energy as a resource option in the Philippine energy program. The government mandates the full-scale development of geothermal energy resources to meet increased power demand brought by rapid industrialization and economic growth, and to reduce fossil fuel importation. It also aims to realize these additional geothermal capacities by tapping private sector investments in the exploration, development, exploitation, construction, operation and management of various geothermal areas in the country.

  14. track 4: enhanced geothermal systems (EGS) | geothermal 2015...

    Broader source: Energy.gov (indexed) [DOE]

    Office portfolio presented fifty three technical project presentations on enhanced geothermal systems technologies (EGS). EGS technologies utilize directional drilling and...

  15. Measurements of volatile organic compounds at a suburban ground site (T1) in Mexico City during the MILAGRO 2006 campaign: Measurement comparison, emission ratios, and source attribution

    SciTech Connect (OSTI)

    Bon, D.M.; Springston, S.; M.Ulbrich, I.; de Gouw, J. A.; Warneke, C.; Kuster, W. C.; Alexander, M. L.; Baker, A.; Beyersdorf, A. J.; Blake, D.; Fall, R.; Jimenez, J. L., Herndon, S. C.; Huey, L. G.; Knighton, W. B.; Ortega, J.; Vargas, O.

    2011-03-16

    Volatile organic compound (VOC) mixing ratios were measured with two different instruments at the T1 ground site in Mexico City during the Megacity Initiative: Local and Global Research Observations (MILAGRO) campaign in March of 2006. A gas chromatograph with flame ionization detector (GC-FID) quantified 18 light alkanes, alkenes and acetylene while a proton-transfer-reaction ion-trap mass spectrometer (PIT-MS) quantified 12 VOC species including oxygenated VOCs (OVOCs) and aromatics. A GC separation system was used in conjunction with the PIT-MS (GC-PIT-MS) to evaluate PIT-MS measurements and to aid in the identification of unknown VOCs. The VOC measurements are also compared to simultaneous canister samples and to two independent proton-transfer-reaction mass spectrometers (PTR-MS) deployed on a mobile and an airborne platform during MILAGRO. VOC diurnal cycles demonstrate the large influence of vehicle traffic and liquid propane gas (LPG) emissions during the night and photochemical processing during the afternoon. Emission ratios for VOCs and OVOCs relative to CO are derived from early-morning measurements. Average emission ratios for non-oxygenated species relative to CO are on average a factor of {approx}2 higher than measured for US cities. Emission ratios for OVOCs are estimated and compared to literature values the northeastern US and to tunnel studies in California. Positive matrix factorization analysis (PMF) is used to provide insight into VOC sources and processing. Three PMF factors were distinguished by the analysis including the emissions from vehicles, the use of liquid propane gas and the production of secondary VOCs + long-lived species. Emission ratios to CO calculated from the results of PMF analysis are compared to emission ratios calculated directly from measurements. The total PIT-MS signal is summed to estimate the fraction of identified versus unidentified VOC species.

  16. Snake River Geothermal Project- Innovative Approaches to Geothermal Exploration

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Project objective: To Implement and Test Geological and Geophysical Techniques for Geothermal Exploration. Project seeks to lower the cost of geothermal energy development by identifying which surface and borehole techniques are most efficient at identifying hidden resources.

  17. Energy, Exergy and Uncertainty Analyses of the Thermal Response Test for a Ground Heat Exchanger

    E-Print Network [OSTI]

    Al-Shayea, Naser Abdul-Rahman

    response test of a ground heat exchanger. In this study, a vertical U-shaped ground heat exchanger with 80 understanding of the overall performance of vertical ground heat exchangers, verifies the thermal response test from the hydraulic section #12;3 1. Introduction Geothermal energy (geo-exchange) systems have been

  18. A model study of the effects of climatic precipitation changes on ground temperatures

    E-Print Network [OSTI]

    Biasutti, Michela

    of the subsurface are observed in boreholes as temperature perturbations to background steady state tem- perature premise underlying geothermal reconstruc- tions of ground surface temperature (GST) is that temper- atures

  19. GEOTHERMAL SUBSIDENCE RESEARCH PROGRAM PLAN

    E-Print Network [OSTI]

    Lippmann, Marcello J.

    2010-01-01

    of Subsiding Areas and Geothermal Subsidence Potential25 Project l-Subsidence Case Histories . . . . . . . . . .8 . Subsidence Models . . . . . . . . . . . . . . . .

  20. Accelerating Geothermal Research (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-05-01

    Geothermal research at the National Renewable Energy Laboratory (NREL) is advancing geothermal technologies to increase renewable power production. Continuous and not dependent on weather, the geothermal resource has the potential to jump to more than 500 gigawatts in electricity production, which is equivalent to roughly half of the current U.S. capacity. Enhanced geothermal systems have a broad regional distribution in the United States, allowing the potential for development in many locations across the country.

  1. The Thirteenth Annual Interagency Geothermal Coordinating Council Report for Fiscal Year 1988

    SciTech Connect (OSTI)

    None

    1989-03-21

    The U.S. Interagency Geothermal Coordinating Council was a multi-agency group charged with identifying and reducing barriers to geothermal energy development in the U.S. Many of the issues covered related to regulations for and progress in the leasing of Federal lands in the West for power development. The IGCC reports are important sources of historical information. (DJE 2005)

  2. Indo-Australian Geothermal Energy Capacity Building Workshop February 8-9 2010, NGRI, Hyderabad.

    E-Print Network [OSTI]

    Harinarayana, T.

    Indo-Australian Geothermal Energy Capacity Building Workshop February 8-9 2010, NGRI, Hyderabad. Geothermal energy is known to be one of the clean energy without smoke and also without environmental hazards in identifying these resources in different parts of our country for possible exploitation of the energy source

  3. 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 of biomass to fuel ethanol is considerable. In addition, combining these two renewable energy resources of wedding an HDR geothermal power source to a biomass conversion process is flexibility, both in plant

  4. Geothermal Academy: Focus Center for Data Collection, Analysis, and Dissemination

    SciTech Connect (OSTI)

    Nakagawa, Masami, Ph.D.; Fujiono, Hendro, Ph.D.; McCartney, John S., Ph.D.; Reed, Adam, J.D., Esq.

    2011-10-31

    Geothermal Academy: A Pathway for Confirmation of Ground-Source Heat Pumps in the United States. In 2008, Oak Ridge National Laboratory issued a report on geothermal heats pumps (GHPs) focused on the market status, barriers to adoption, and actions to overcome these barriers (Hughes 2008). Of the barriers raised in this report, of the most pressing is the lack of performance and energy usage data for GHPs. Further, an associated barrier is a lack of a fair comparison of the energy usage of conventional heating and cooling systems for the same building. Because of these barriers, we are not able to say how much energy is used by well-designed GHP systems on a long-term basis, nor are we able to say how better their energy usage is compared to conventional systems. The need for a fair comparison with conventional systems is particularly relevant as modern versions of conventional air conditioners, gas furnaces, and boilers have also incorporated energy saving technologies. As a first step to address this barrier, the Geothermal Academy has developed a framework for data collection. This framework has already been applied to several geothermal installations in Colorado (Nakagawa etal. 2010). The framework classifies data into different categories based on the relevance of the dat to understanding the energy consumption of a GHP system. The categories are: direct energy consumption data, heat exchange performance data, and GHP design parameter data. The main recommendation of this project is to include a minimal data collection system on each heat pump installed in the U.S., capable of measuring the electrical energy consumed, the entering/exiting fluid temperatures, and circulation rates. This is a viable and cost effective solution which will provide performance data, as data collection systems are only a fraction of the cost of a GHP unit and modern GHP units already incorporate sensors to monitor energy usage and the entering and exiting fluid temperatures. Specifically, these sensors are used to control the GHP unit to provide the heat exchange required to provide a desired temperature within a building. Accordingly, it is straightforward for this operational data to be collected to start building a database of GHP performance such that can provide statistically relevant comparison with other heating and cooling systems. In addition to collecting the data, such a system could be easily implemented with a wireless transmitter so that data could be sent to a home PC where it could be transmitted to a central database. Display of the data on a user's PC would provide feedback on the performance of their system which could perhaps refine their use of the system to reach their personal energy goals. Although a system such as that described above has yet to be incorporated directly into commercial GHP systems, it is straightforward and inexpensive to outfit a GHP with a data acquisition system and supplemental sensors. A secondary recommendation is to consider funding a pilot effort that will collect the energy and performance time series data from a representative sample of installations. A preliminary pilot effort was undertaken by the Geothermal Academy at a middle school in Ft. Collins, Colorado, which demonstrated the feasibility and ease of such an effort. A full-scale pilot effort would be most suited to evaluate the performance of GHP installations in different climate settings, preferably focusing on residential, commercial, and public buildings. If a full-scale pilot effort were to be undertaken, it is recommended to also identify large buildings which may incorporate a back-up conventional heating and cooling system in order to provide statistically relevant comparison data to assess the improvement in GHP energy usage over other heating and cooling technologies. Such a data collection system would provide several benefits to the different sectors of society (consumers, installers, policy makers, researchers, utility companies, government regulators) which are concerned with GHP technology and implementation.

  5. SMU Geothermal Conference 2011 - Geothermal Technologies Program

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo. 195 -Rob Robertseere.energy.gov Timothy Reinhardt Geothermal

  6. HIGH TEMPERATURE GEOTHERMAL RESERVOIR ENGINEERING

    E-Print Network [OSTI]

    Schroeder, R.C.

    2009-01-01

    on the Cerro P r i e t o Geothermal F i e l d , Mexicali,e C e r r o P r i e t o Geothermal F i e l d , Baja C a l i1979 HIGH TEMPERATURE GEOTHERMAL RESERVOIR ENGINEERING R.

  7. Postgraduate Certificate in Geothermal Energy

    E-Print Network [OSTI]

    Auckland, University of

    Postgraduate Certificate in Geothermal Energy Technology The University of Auckland The University for development of geothermal fields is large and many countries are seeking to move away from fossil fuel power generation for both economic and environmental reasons. Global revenues for geothermal power were estimated

  8. GEOTHERMAL ENERGY DEVELOPMENT Paul Kruger

    E-Print Network [OSTI]

    Stanford University

    SGP-TR 9 * GEOTHERMAL ENERGY DEVELOPMENT Paul Kruger C i v i l Engineering Department Stanford on an aggressive program t o develop its indigenous resources of geothermal energy. For more than a decade, geothermal energy has been heralded as one of the more promising forms of energy a l t e r n a t e t o o i l

  9. DOWNHOLE ENTHALPY MEASUREMENT IN GEOTHERMAL

    E-Print Network [OSTI]

    Stanford University

    SGP-TR-186 DOWNHOLE ENTHALPY MEASUREMENT IN GEOTHERMAL WELLS WITH FIBER OPTICS Nilufer Atalay June 2008 Financial support was provided through the Stanford Geothermal Program under Idaho National University Stanford Geothermal Program Interdisciplinary Research in Engineering and Earth Sciences STANFORD

  10. STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY

    E-Print Network [OSTI]

    Stanford University

    STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY STANFORD, CALIFORNIA 94305 SGP-TR-42 PROCEEDINGS SPECIAL PANEL ON GEOTHERMAL MODEL INTERCOMPARISON STUDY held in conjunction with The Code Comparison Contracts issued by Department of Energy Division of Geothermal Energy San Francisco Operations Office

  11. Stanford Geothermal Program Tnterdisciplinary Research

    E-Print Network [OSTI]

    Stanford University

    Stanford Geothermal Program Tnterdisciplinary Research in Engineering and Earth Sciences Stanford University Stanford, California A LABORATORY MODEL OF STWLATED GEOTHERMAL RESERVOIRS by A. Hunsbedt P. Kruger created by artificial stimulation of geothermal reservoirs has been con- structed. The model has been used

  12. STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY

    E-Print Network [OSTI]

    Stanford University

    STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY STANFORD, CALIFORNIA 94305 SGP-TR-35 SECOND ANNUAL #12;INTRODUCTION The research e f f o r t of t h e Stanford Geothermal Program is focused on geothermal reservoir engineering. The major o b j e c t i v e of t h e protiram is t o develop techniques f o

  13. Stanford Geothermal Program Stanford University

    E-Print Network [OSTI]

    Stanford University

    s Stanford Geothermal Program Stanford University Stanford, California RADON MEASUEMENTS I N GEOTHERMAL SYSTEMS ? d by * ** Alan K. Stoker and Paul Kruger SGP-TR-4 January 1975 :: raw at Lcs Alams S c i and water, o i l and n a t u r a l gas wells. with radon i n geothermal reservoirs. Its presence i n

  14. Stanford Geothermal Program Final Report

    E-Print Network [OSTI]

    Stanford University

    Stanford Geothermal Program Final Report July 1996 - June 1999 Funded by the U.S. Department of Energy under grant number DE-FG07-95ID13370 Stanford Geothermal Program Department of Petroleum ....................................................................................................................6 2. THE ROLE OF CAPILLARY FORCES IN THE NATURAL STATE OF FRACTURED GEOTHERMAL RESERVOIRS

  15. Next Generation Geothermal Power Plants

    SciTech Connect (OSTI)

    Brugman, John; Hattar, Mai; Nichols, Kenneth; Esaki, Yuri

    1995-09-01

    A number of current and prospective power plant concepts were investigated to evaluate their potential to serve as the basis of the next generation geothermal power plant (NGGPP). The NGGPP has been envisaged as a power plant that would be more cost competitive (than current geothermal power plants) with fossil fuel power plants, would efficiently use resources and mitigate the risk of reservoir under-performance, and minimize or eliminate emission of pollutants and consumption of surface and ground water. Power plant concepts were analyzed using resource characteristics at ten different geothermal sites located in the western United States. Concepts were developed into viable power plant processes, capital costs were estimated and levelized busbar costs determined. Thus, the study results should be considered as useful indicators of the commercial viability of the various power plants concepts that were investigated. Broadly, the different power plant concepts that were analyzed in this study fall into the following categories: commercial binary and flash plants, advanced binary plants, advanced flash plants, flash/binary hybrid plants, and fossil/geothed hybrid plants. Commercial binary plants were evaluated using commercial isobutane as a working fluid; both air-cooling and water-cooling were considered. Advanced binary concepts included cycles using synchronous turbine-generators, cycles with metastable expansion, and cycles utilizing mixtures as working fluids. Dual flash steam plants were used as the model for the commercial flash cycle. The following advanced flash concepts were examined: dual flash with rotary separator turbine, dual flash with steam reheater, dual flash with hot water turbine, and subatmospheric flash. Both dual flash and binary cycles were combined with other cycles to develop a number of hybrid cycles: dual flash binary bottoming cycle, dual flash backpressure turbine binary cycle, dual flash gas turbine cycle, and binary gas turbine cycle. Results of this study indicate that dual flash type plants are preferred at resources with temperatures above 400 F. Closed loop (binary type) plants are preferred at resources with temperatures below 400 F. A rotary separator turbine upstream of a dual flash plant can be beneficial at Salton Sea, the hottest resource, or at high temperature resources where there is a significant variance in wellhead pressures from well to well. Full scale demonstration is required to verify cost and performance. Hot water turbines that recover energy from the spent brine in a dual flash cycle improve that cycle's brine efficiency. Prototype field tests of this technology have established its technical feasibility. If natural gas prices remain low, a combustion turbine/binary hybrid is an economic option for the lowest temperature sites. The use of mixed fluids appear to be an attractive low risk option. The synchronous turbine option as prepared by Barber-Nichols is attractive but requires a pilot test to prove cost and performance. Dual flash binary bottoming cycles appear promising provided that scaling of the brine/working fluid exchangers is controllable. Metastable expansion, reheater, Subatmospheric flash, dual flash backpressure turbine, and hot dry rock concepts do not seem to offer any cost advantage over the baseline technologies. If implemented, the next generation geothermal power plant concept may improve brine utilization but is unlikely to reduce the cost of power generation by much more than 10%. Colder resources will benefit more from the development of a next generation geothermal power plant than will hotter resources. All values presented in this study for plant cost and for busbar cost of power are relative numbers intended to allow an objective and meaningful comparison of technologies. The goal of this study is to assess various technologies on an common basis and, secondarily, to give an approximate idea of the current costs of the technologies at actual resource sites. Absolute costs at a given site will be determined by the specifics of a given pr

  16. EA-1676: U.S. Geothermal's Neal Hot Springs Geothermal Facility...

    Office of Environmental Management (EM)

    76: U.S. Geothermal's Neal Hot Springs Geothermal Facility in Vale, OR EA-1676: U.S. Geothermal's Neal Hot Springs Geothermal Facility in Vale, OR December 1, 2009 EA-1676: Final...

  17. Vegetation component of geothermal EIS studies: Introduced plants, ecosystem stability, and geothermal development

    SciTech Connect (OSTI)

    1994-10-01

    This paper contributes new information about the impacts from introduced plant invasions on the native Hawaiian vegetation as consequences of land disturbance and geothermal development activities. In this regard, most geothermal development is expected to act as another recurring source of physical disturbance which favors the spread and maintenance of introduced organisms throughout the region. Where geothermal exploration and development activities extend beyond existing agricultural and residential development, they will become the initial or sole source of disturbance to the naturalized vegetation of the area. Kilauea has a unique ecosystem adapted to the dynamics of a volcanically active landscape. The characteristics of this ecosystem need to be realized in order to understand the major threats to the ecosystem and to evaluate the effects of and mitigation for geothermal development in Puna. The native Puna vegetation is well adapted to disturbances associated with volcanic eruption, but it is ill-adapted to compete with alien plant species in secondary disturbances produced by human activities. Introduced plant and animal species have become a major threat to the continued presence of the native biota in the Puna region of reference.

  18. STATUS OF GEOTHERMAL RESERVOIR ENGINEERING MANAGEMENT PROGRAM ("GREMP") -DECEMBER, 1979

    E-Print Network [OSTI]

    Howard, J. H.

    2012-01-01

    DOE), Division of Geothermal Energy (DGE) proposed thatof Energy, Division of Geothermal Energy, through Lawrence

  19. State Geothermal Resource Assessment and Data Collection Efforts

    Office of Energy Efficiency and Renewable Energy (EERE)

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

  20. Preliminary geothermal assessment surveys for the State of Hawaii

    SciTech Connect (OSTI)

    Thomas, D.M.; Cox, M.E.; Lienert, B.R.; Kauahikaua, J.P.; Mattice, M.D.

    1980-09-01

    The Geothermal Resource Assessment Program of the Hawaii Institute of Geophysics has conducted a series of geochemical and geophysical surveys in ten separate locations within the State of Hawaii in an effort to identify and assess potential geothermal areas throughout the state. The techniques applied include groundwater chemistry and temperatures, soil mercury surveys, ground radon emanometry, time-domain electromagnetic surveys and Schlumberger resistivity soundings. Although geochemical and geophysical anomalies were identified in nearly all the survey sites, those areas which show most promise, based on presently available data, for a geothermal resource are as follows: Puna, Kailua Kona, and Kawaihae on the island of Hawaii; Haiku-Paia and Olowalu-Ukumehame canyons on Maui; and Lualualei Valley on Oahu. Further surveys are planned for most of these areas in order to further define the nature of the thermal resource present.

  1. Controlled Source Frequency-Domain Magnetics At Salt Wells Area...

    Open Energy Info (EERE)

    Controlled Source Frequency-Domain Magnetics At Salt Wells Area (Montgomery, Et Al., 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity:...

  2. Inversion of synthetic aperture radar interferograms for sources...

    Open Energy Info (EERE)

    Inversion of synthetic aperture radar interferograms for sources of production-related subsidence at the Dixie Valley geothermal field Jump to: navigation, search OpenEI Reference...

  3. Geothermal energy program summary

    SciTech Connect (OSTI)

    Not Available

    1990-01-01

    The Geothermal Technology Division (GTD) of the US Department of Energy (DOE) is charged with the lead federal role in the research and development (R D) of technologies that will assist industry in economically exploiting the nation's vast geothermal resources. The GTD R D Program represents a comprehensive, balanced approach to establishing all forms of geothermal energy as significant contributors to the nation's energy supply. It is structured both to maintain momentum in the growth of the existing hydrothermal industry and to develop long-term options offering the greatest promise for practical applications. This volume, Volume 2, contains a detailed compilation of each GTD-funded R D activity performed by national laboratories or under contract to industrial, academic, and nonprofit research institutions.

  4. Enhanced Geothermal Systems Technologies

    Broader source: Energy.gov [DOE]

    Geothermal Energy an?d the Enhanced Geothermal Systems Concept The Navy 1 geothermal power plant near Coso Hot Springs, California, is applying EGS technology. Heat is naturally present everywhere in the earth. For all intents and purposes, heat from the earth is inexhaustible. Water is not nearly as ubiquitous in the earth as heat. Most aqueous fluids are derived from surface waters that have percolated into the earth along permeable pathways such as faults. Permeability is a measure of the ease of fluid flow through rock. The permeability of rock results from pores, fractures, joints, faults, and other openings which allow fluids to move. High permeability implies that fluids can flow rapidly through the rock. Permeability and, subsequently, the amount of fluids tend to decrease with depth as openings in the rocks compress from the weight of the overburden.

  5. Geothermal Plant Capacity Factors

    SciTech Connect (OSTI)

    Greg Mines; Jay Nathwani; Christopher Richard; Hillary Hanson; Rachel Wood

    2015-01-01

    The capacity factors recently provided by the Energy Information Administration (EIA) indicated this plant performance metric had declined for geothermal power plants since 2008. Though capacity factor is a term commonly used by geothermal stakeholders to express the ability of a plant to produce power, it is a term frequently misunderstood and in some instances incorrectly used. In this paper we discuss how this capacity factor is defined and utilized by the EIA, including discussion on the information that the EIA requests from operations in their 923 and 860 forms that are submitted both monthly and annually by geothermal operators. A discussion is also provided regarding the entities utilizing the information in the EIA reports, and how those entities can misinterpret the data being supplied by the operators. The intent of the paper is to inform the facility operators as the importance of the accuracy of the data that they provide, and the implications of not providing the correct information.

  6. 2008 Geothermal Technologies Market Report

    SciTech Connect (OSTI)

    Cross, J.; Freeman, J.

    2009-07-01

    This report describes market-wide trends for the geothermal industry throughout 2008 and the beginning of 2009. It begins with an overview of the U.S. DOE's Geothermal Technology Program's (GTP's) involvement with the geothermal industry and recent investment trends for electric generation technologies. The report next describes the current state of geothermal power generation and activity within the United States, costs associated with development, financing trends, an analysis of the levelized cost of energy (LCOE), and a look at the current policy environment. The report also highlights trends regarding direct use of geothermal energy, including geothermal heat pumps (GHPs). The final sections of the report focus on international perspectives, employment and economic benefits from geothermal energy development, and potential incentives in pending national legislation.

  7. Geothermal Energy; (USA)

    SciTech Connect (OSTI)

    Raridon, M.H.; Hicks, S.C. (eds.)

    1991-01-01

    Geothermal Energy (GET) announces on a bimonthly basis the current worldwide information available on the technologies required for economic recovery of geothermal energy and its use as direct heat or for electric power production. This publication contains the abstracts of DOE reports, journal article, conference papers, patents, theses, and monographs added to the Energy Science and Technology Database (EDB) during the past two months. Also included are US information obtained through acquisition programs or interagency agreements and international information obtained through the International Energy Agency's Energy Technology Data Exchange or government-to-government agreements.

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

    SciTech Connect (OSTI)

    Not Available

    2014-09-01

    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.

  9. Enthalpy restoration in geothermal energy processing system

    DOE Patents [OSTI]

    Matthews, Hugh B. (Boylston, MA)

    1983-01-01

    A geothermal deep well energy extraction system is provided of the general type in which solute-bearing hot water is pumped to the earth's surface from a relatively low temperature geothermal source by transferring thermal energy from the hot water to a working fluid for driving a primary turbine-motor and a primary electrical generator at the earth's surface. The superheated expanded exhaust from the primary turbine motor is conducted to a bubble tank where it bubbles through a layer of sub-cooled working fluid that has been condensed. The superheat and latent heat from the expanded exhaust of the turbine transfers thermal energy to the sub-cooled condensate. The desuperheated exhaust is then conducted to the condenser where it is condensed and sub-cooled, whereupon it is conducted back to the bubble tank via a barometric storage tank. The novel condensing process of this invention makes it possible to exploit geothermal sources which might otherwise be non-exploitable.

  10. MODELING SUBSIDENCE DUE TO GEOTHERMAL FLUID PRODUCTION

    E-Print Network [OSTI]

    Lippmann, M.J.

    2011-01-01

    Applications o f Geothermal Energy and t h e i r Place i n tcompaction, computers, geothermal energy, pore-waterf o r developing geothermal energy i n the United States (

  11. Induced seismicity associated with enhanced geothermal system

    E-Print Network [OSTI]

    Majer, Ernest L.

    2006-01-01

    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. ,

  12. SEISMOLOGICAL INVESTIGATIONS AT THE GEYSERS GEOTHERMAL FIELD

    E-Print Network [OSTI]

    Majer, E. L.

    2011-01-01

    P. Muffler, 1972. The Geysers Geothermal Area, California.B. C. Hearn, 1977. ~n Geothermal Prospecting Geology, TheC. , 1968. of the Salton Sea Geothermal System. pp. 129-166.

  13. NATIONAL GEOTHERMAL INFORMATION RESOURCE ANNUAL REPORT, 1977

    E-Print Network [OSTI]

    Phillips, Sidney L.

    2012-01-01

    Schwartz, Oct: 1977. "Geothermal Aspects o f Hydrogen Sul 4.S.R. Schwartz, "Review o f Geothermal Subsidence", LBL-3220,k i l e d to over 200 geothermal specialists i n 1977. Over

  14. SUBSIDENCE DUE TO GEOTHERMAL FLUID WITHDRAWAL

    E-Print Network [OSTI]

    Narasimhan, T.N.

    2013-01-01

    of Geothermal Resources, Pisa, v. 2, p. 99-109. Browne,of Geothermal Resources, Pisa, v. 2, p. 287-294. Sageev,Use of Geothermal Resources, Pisa, 1970, v. 2, p. 564-570.

  15. ANNOTATED RESEARCH BIBLIOGRAPHY FOR GEOTHERMAL RESERVOIR ENGINEERING

    E-Print Network [OSTI]

    Sudo!, G.A

    2012-01-01

    i o n o f Geothermal Resources. Pisa, Sept. 22-Oct. 1, 1970:n o f Geothermal Resources. Pisa, Sept. 22-Oct. 1 1970: 516-o f Geothermal Resources, Pisa, Sept. 22-Oct. 1 1970: .1440-

  16. MODELING SUBSIDENCE DUE TO GEOTHERMAL FLUID PRODUCTION

    E-Print Network [OSTI]

    Lippmann, M.J.

    2011-01-01

    t al. , "Modeling Geothermal Systems," A t t i dei Convegnio f L i q u i d Geothermal Systems," Open-File Report 75-i q u i d Dominated Geothermal Systems," Proceedings o f t h

  17. ANNOTATED RESEARCH BIBLIOGRAPHY FOR GEOTHERMAL RESERVOIR ENGINEERING

    E-Print Network [OSTI]

    Sudo!, G.A

    2012-01-01

    Phenomena i n Geothermal Systems. I' U.N. Symposium on theModeling o f Geothermal Systems." 2nd U.N. Symposium on theassociations of geothermal systems and postulates on a

  18. Geothermal Regulatory Roadmap | OpenEI Community

    Open Energy Info (EERE)

    geothermal Type Term Title Author Replies Last Post sort icon Blog entry geothermal Geothermal Regulatory Roadmap featured on NREL Now Graham7781 5 Aug 2013 - 14:18 Blog entry...

  19. Potential of geothermal energy in China

    E-Print Network [OSTI]

    Sung, Peter On

    2010-01-01

    This thesis provides an overview of geothermal power generation and the potential for geothermal energy utilization in China. Geothermal energy is thermal energy stored in the earth's crust and currently the only ubiquitously ...

  20. Geothermal Technologies Program Blue Ribbon Panel Recommendations

    Broader source: Energy.gov [DOE]

    This report describes the recommendations of the Geothermal Blue Ribbon Panel, a panel of geothermal experts assembled in March 2011 for a discussion on the future of geothermal energy in the U.S.

  1. Geothermal Technologies Office Hosts Collegiate Competition

    Office of Energy Efficiency and Renewable Energy (EERE)

    To further accelerate the adoption of geothermal energy, the United States Department of Energy is sponsoring a Geothermal Case Study Challenge (CSC) to aggregate geothermal data that can help us...

  2. Selling Geothermal Systems The "Average" Contractor

    E-Print Network [OSTI]

    Selling Geothermal Systems #12;The "Average" Contractor · History of sales procedures · Manufacturer Driven Procedures · What makes geothermal technology any harder to sell? #12;"It's difficult to sell a geothermal system." · It should

  3. THERMO-HYDRO-MECHANICAL SIMULATION OF GEOTHERMAL

    E-Print Network [OSTI]

    Politècnica de Catalunya, Universitat

    Seminario del Grupo de Hidrologìa Subterrànea - UPC, Barcelona #12;INTRODUCTION Enhanced geothermal systems Geothermal gradient ~ 33 °C/Km Hydraulic stimulation enhances fracture permeability (energyTHERMO-HYDRO-MECHANICAL SIMULATION OF GEOTHERMAL RESERVOIR STIMULATIONRESERVOIR STIMULATION Silvia

  4. Tracing Geothermal Fluids

    SciTech Connect (OSTI)

    Michael C. Adams Greg Nash

    2004-03-31

    Chemical compounds have been designed under this contract that can be used to trace water that has been injected into vapor-dominated and two-phase geothermal fields. Increased knowledge of the injection flow is provided by the tracers, and this augments the power that can be produced. Details on the stability and use of these tracers are included in this report.

  5. Reinjection into geothermal reservoirs

    SciTech Connect (OSTI)

    Bodvarsson, G.S.; Stefansson, V.

    1987-08-01

    Reinjection of geothermal wastewater is practiced as a means of disposal and for reservoir pressure support. Various aspects of reinjection are discussed, both in terms of theoretical studies as well as specific field examples. The discussion focuses on the major effects of reinjection, including pressure maintenance and chemical and thermal effects. (ACR)

  6. Argonne Geothermal Geochemical Database v2.0

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Harto, Christopher

    2013-05-22

    A database of geochemical data from potential geothermal sources aggregated from multiple sources as of March 2010. The database contains fields for the location, depth, temperature, pH, total dissolved solids concentration, chemical composition, and date of sampling. A separate tab contains data on non-condensible gas compositions. The database contains records for over 50,000 wells, although many entries are incomplete. Current versions of source documentation are listed in the dataset.

  7. Argonne Geothermal Geochemical Database v2.0

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Harto, Christopher

    A database of geochemical data from potential geothermal sources aggregated from multiple sources as of March 2010. The database contains fields for the location, depth, temperature, pH, total dissolved solids concentration, chemical composition, and date of sampling. A separate tab contains data on non-condensible gas compositions. The database contains records for over 50,000 wells, although many entries are incomplete. Current versions of source documentation are listed in the dataset.

  8. 2014 Geothermal Resources Council Annual Meeting

    Broader source: Energy.gov [DOE]

    The Annual Meeting attracts geothermal industry stakeholders worldwide and provides opportunity to participate in presentations on geothermal research, exploration, development, and utilization.

  9. Geothermal Reconnaissance From Quantitative Analysis Of Thermal...

    Open Energy Info (EERE)

    Geothermal Reconnaissance From Quantitative Analysis Of Thermal Infrared Imagery Jump to: navigation, search OpenEI Reference LibraryAdd to library Reference: Geothermal...

  10. The Energy Department's Geothermal Technologies Office Releases...

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

    The Energy Department's Geothermal Technologies Office Releases 2013 Annual Report The Energy Department's Geothermal Technologies Office Releases 2013 Annual Report February 7,...

  11. Geothermal Exploration Best Practices Webinar Presentation Now...

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

    Renewable Energy DOE Projects Receive Honors for Best Geothermal Presentations Workshop to Examine Outlook for State and Federal Policies to Promote Geothermal Energy in the West...

  12. NATIONAL GEOTHERMAL INFORMATION RESOURCE ANNUAL REPORT, 1977

    E-Print Network [OSTI]

    Phillips, Sidney L.

    2012-01-01

    Review o f Geothermal Subsidence", LBL-3220, Sept. 1975. 5.bles emissions; (3) subsidence; and (4) boron. Generally,Review of Geothermal Subsidence", LBL-3220, September 1975.

  13. Geothermal Technologies Program Annual Peer Review Presentation...

    Broader source: Energy.gov (indexed) [DOE]

    2012 Peer Review presentation by Doug Hollett, Program Manager, Geothermal Technologies Program gtp2012peerreviewdhollett.pdf More Documents & Publications Stanford Geothermal...

  14. Geothermal Technologies Office 2015 Peer Review

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

    | US DOE Geothermal Office eere.energy.gov Geothermal Technologies Office 2015 Peer Review Sustainability of Shear-Induced Permeability for EGS Reservoirs - A Laboratory...

  15. Digital Mapping Of Structurally Controlled Geothermal Features...

    Open Energy Info (EERE)

    (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...

  16. Integrated Geoscience Investigation and Geothermal Exploration...

    Open Energy Info (EERE)

    Al., 2006) Isotopic Analysis At Chena Geothermal Area (Holdmann, Et Al., 2006) Micro-Earthquake At Chena Geothermal Area (Holdmann, Et Al., 2006) Pressure Temperature Log At Chena...

  17. Strategic Planning, Analysis, and Geothermal Informatics Subprogram...

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

    Strategic Planning, Analysis, and Geothermal Informatics Subprogram Overview Strategic Planning, Analysis, and Geothermal Informatics Subprogram Overview This is an overview of...

  18. Geothermal Direct Use Technology and the Marketplace

    Broader source: Energy.gov [DOE]

    Geothermal energy applications are emerging across a much wider spectrum of cascaded uses, from lower temperature geothermal energy production to direct heating and cooling, to agricultural uses.

  19. Innovative Exploration Techniques for Geothermal Assessment at...

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

    Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Innovative Exploration Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Innovative Exploration...

  20. Modeling of Geothermal Reservoirs: Fundamental Processes, Computer...

    Open Energy Info (EERE)

    Abstract This article attempts to critically evaluate the present state of the art of geothermal reservoir simulation. Methodological aspects of geothermal reservoir...

  1. Google Archives by Fiscal Year — Geothermal

    Broader source: Energy.gov [DOE]

    From the EERE Web Statistics Archive: Geothermal Technologies Office, retired Google Analytics profiles for the Geothermal Technologies Blog for FY12-FY13.

  2. North Carolina/Geothermal | Open Energy Information

    Open Energy Info (EERE)

    Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon North CarolinaGeothermal < North Carolina Jump to: navigation, search GEOTHERMAL...

  3. Geothermal Energy Production from Low Temperature Resources,...

    Open Energy Info (EERE)

    Geothermal Energy Production from Low Temperature Resources, Coproduced Fluids from Oil and Gas Wells, and Geopressured Resources Jump to: navigation, search Geothermal ARRA...

  4. Cuttings Analysis At International Geothermal Area, Indonesia...

    Open Energy Info (EERE)

    Cuttings Analysis At International Geothermal Area, Indonesia (Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Cuttings Analysis At...

  5. The Geothermal Technologies Office Congratulates this Year's...

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

    to bring new geothermal power online. Surprise Valley Electrification Corporation, in Paisley, Oregon, (in the image left) seeks to develop geothermal electric power from an...

  6. Integrated Chemical Geothermometry System for Geothermal Exploration

    Broader source: Energy.gov [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.

  7. Daemen Alternative Energy/Geothermal Technologies Demonstration...

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

    Daemen Alternative EnergyGeothermal Technologies Demonstration Program Erie County Daemen Alternative EnergyGeothermal Technologies Demonstration Program Erie County Project...

  8. GETEM -Geothermal Electricity Technology Evaluation Model | Department...

    Broader source: Energy.gov (indexed) [DOE]

    guide to providing input to GETEM, the Geothermal Electricity Technology Evaluation Model. GETEM is designed to help the Geothermal Technologies Program of the U.S. Department of...

  9. 2012 Geothermal Webinar | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    This Office of Indian Energy webinar provides information on developing geothermal resources on tribal lands with an overview of: geothermal resources by region; technology...

  10. An Evaluation of Enhanced Geothermal Systems Technology

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

    An Evaluation of Enhanced Geothermal Systems Technology Geothermal Technologies Program 2008 Foreword This document presents the results of an eight-month study by the Department...

  11. Analysis of Geothermal Reservoir Stimulation Using Geomechanics...

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

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

  12. Employment Impacts of Geothermal Electric Projects (Technical...

    Office of Scientific and Technical Information (OSTI)

    Employment Impacts of Geothermal Electric Projects Citation Details In-Document Search Title: Employment Impacts of Geothermal Electric Projects You are accessing a document...

  13. Geothermal Literature Review At Lightning Dock Geothermal Area...

    Open Energy Info (EERE)

    around the state at over 50 temperature anomalies. Examined correlations between structures and thermal anomalies. Made recommendations for future geothermal use. Much of the...

  14. BOREHOLE PRECONDITIONING OF GEOTHERMAL WELLS FOR ENHANCED GEOTHERMAL...

    Open Energy Info (EERE)

    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...

  15. Geothermal Site Assessment Using the National Geothermal Data...

    Open Energy Info (EERE)

    Company Organization: University of Nevada-Reno Sector: Energy Focus Area: Renewable Energy, Geothermal Topics: Resource assessment Resource Type: Case studiesexamples,...

  16. Geothermal Development and the Use of Categorical Exclusions Under the National Environmental Policy Act of 1969 (Presentation)

    SciTech Connect (OSTI)

    Levine, A.; Young, K. R.

    2014-09-01

    The federal environmental review process under the National Environmental Policy Act of 1969 (NEPA) can be complex and time consuming. Currently, a geothermal developer may have to complete the NEPA process multiple times during the development of a geothermal project. One mechanism to reduce the timeframe of the federal environmental review process for activities that do not have a significant environmental impact is the use of Categorical Exclusions (CXs), which can exempt projects from having to complete an Environmental Assessment or Environmental Impact Statement. This study focuses primarily on the CX process and its applicability to geothermal exploration. In this paper, we: Provide generalized background information on CXs, including previous NEPA reports addressing CXs, the process for developing CXs, and the role of extraordinary circumstances; Examine the history of the Bureau of Land Management's (BLM) geothermal CXs; Compare current CXs for oil, gas, and geothermal energy; Describe bills proposing new statutory CXs; Examine the possibility of standardizing geothermal CXs across federal agencies; and Present analysis from the Geothermal NEPA Database and other sources on the potential for new geothermal exploration CXs. As part of this study, we reviewed Environmental Assessments (EAs) conducted in response to 20 geothermal exploration drilling permit applications (Geothermal Drilling Permits or Notices of Intents) since the year 2001, the majority of which are from the last 5 years. All 20 EAs reviewed for this study resulted in a Finding of No Significant Impact (FONSI). While many of these FONS's involved proponent proposed or federal agency required mitigation, this still suggests it may be appropriate to create or expand an exploration drilling CX for geothermal, which would have a significant impact on reducing geothermal exploration timelines and up-front costs. Ultimately, federal agencies tasked with permitting and completing environmental reviews for geothermal exploration drilling activities and/or legislative representatives are the responsible parties to discuss the merits and implementation of new or revised CXs for geothermal development.

  17. Chemical logging of geothermal wells

    DOE Patents [OSTI]

    Allen, Charles A. (Idaho Falls, ID); McAtee, Richard E. (Idaho Falls, ID)

    1981-01-01

    The presence of geothermal aquifers can be detected while drilling in geothermal formations by maintaining a chemical log of the ratio of the concentrations of calcium to carbonate and bicarbonate ions in the return drilling fluid. A continuous increase in the ratio of the concentrations of calcium to carbonate and bicarbonate ions is indicative of the existence of a warm or hot geothermal aquifer at some increased depth.

  18. NREL SBV Pilot Geothermal Technologies

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of experimental data, high-resolution 3-D visual imagery and large-scale simulation data. For more information, contact: Craig.Turchi@nrel.gov (Geothermal Technical Questions)...

  19. Geothermal Research and Development Programs

    Broader source: Energy.gov [DOE]

    Here you'll find links to laboratories, universities, and colleges conducting research and development (R&D) in geothermal energy technologies.

  20. Nineteenth workshop on geothermal reservoir engineering: Proceedings

    SciTech Connect (OSTI)

    Ramey, H.J. Jr.; Horne, R.J.; Kruger, P.; Miller, F.G.; Brigham, W.E.; Cook, J.W.

    1994-01-20

    PREFACE The Nineteenth Workshop on Geothermal Reservoir Engineering was held at Stanford University on January 18-20, 1994. This workshop opened on a sad note because of the death of Prof. Henry J. Ramey, Jr. on November 19, 1993. Hank had been fighting leukemia for a long time and finally lost the battle. Many of the workshop participants were present for the celebration of his life on January 21 at Stanford's Memorial Church. Hank was one of the founders of the Stanford Geothermal Program and the Geothermal Reservoir Engineering Workshop. His energy, kindness, quick wit, and knowledge will long be missed at future workshops. Following the Preface we have included a copy of the Memorial Resolution passed by the Stanford University Senate. There were one hundred and four registered participants. Participants were from ten foreign countries: Costa Rica, England, Iceland, Italy, Japan, Kenya, Mexico, New Zealand, Philippines and Turkey. Workshop papers described the performance of fourteen geothermal fields outside the United States. Roland N. Home opened the meeting and welcomed the visitors to the campus. The key note speaker was J.E. ''Ted'' Mock who gave a presentation about the future of geothermal development. The banquet speaker was Jesus Rivera and he spoke about Energy Sources of Central American Countries. Forty two papers were presented at the Workshop. Technical papers were organized in twelve sessions concerning: sciences, injection, production, modeling, and adsorption. Session chairmen are an important part of the workshop and our thanks go to: John Counsil, Mark Walters, Dave Duchane, David Faulder, Gudmundur Bodvarsson, Jim Lovekin, Joel Renner, and Iraj Ershaghi. The Workshop was organized by the Stanford Geothermal Program faculty, staff, and graduate students. We wish to thank Pat Ota, Ted Sumida, and Terri A. Ramey who also produces the Proceedings Volumes for publication. We owe a great deal of thanks to our students who operate audiovisual equipment and to Xianfa Deng who coordinated the meeting arrangements for the Workshop. Roland N. Home Frank G. Miller Paul Kruger William E. Brigham Jean W. Cook

  1. Ground surface temperatures in Canada: Spatial and temporal variability

    E-Print Network [OSTI]

    Long, Bernard

    show that the ground has warmed about 0.7 K in the last 100 years. Spatial variability is significant temperatures in Canada: Spatial and temporal variability, Geophys. Res. Lett., 30(10), 1499, doi:10.1029/2003GL inferred from geothermal data have shown that the study of perturbations to the Earth's energy balance

  2. Basic data for thermal springs and wells as recorded in GEOTHERM: Wyoming

    SciTech Connect (OSTI)

    Bliss, J.D.

    1983-05-01

    GEOTHERM sample file contains 356 records for Wyoming. Three computer-generated indexes are found in appendices A, B, and C of this report. The indexes give one line summaries of each GEOTHERM record describing the chemistry of geothermal springs and wells in the sample file for Wyoming. Each index is sorted by different variables to assist the user in locating geothermal records describing specific sites. Appendix A is sorted by the county name and the name of the source. Also given are latitude, longitude (both use decimal minutes), township, range, section, GEOTHERM record identifier, and temperature (/sup 0/C). Appendix B is sorted by county, township, range, and section. Also given are name of source, GEOTHERM record identifier, and temperature (/sup 0/C). Appendix C is first sorted into one-degree blocks by latitude, and longitude, and then by name of source. Adjacent one-degree blocks which are published as a 1:250,000 map are combined under the appropriate map name. Also given are GEOTHERM record identifier, and temperature (/sup 0/C). A bibliography is given in Appendix D.

  3. Washington state basic data for thermal springs and wells as recorded in GEOTHERM

    SciTech Connect (OSTI)

    Bliss, J.D.

    1983-07-01

    This report on Washington is one of a series intended to preserve the data collected for GEOTHERM and make the data available to the public. Three computer-generated indexes are found in appendices A, B, and C of this report. The indexes give one line summaries of each GEOTHERM record describing the chemistry of geothermal springs and wells in the sample file for Washington. Each index is sorted by different variables to assist the user in locating geothermal records describing specific sites. Appendix A is sorted by county name and the name of the source. Also given are latitude, longitude (both in decimal minutes), township, range, section, GEOTHERM record identifier, and temperature (/sup 0/C). Appendix is sorted by county, township, range, and section. Also given are name of source, GEOTHERM record identifier, and temperature (/sup 0/C). Appendix C is first sorted into one-degree blocks by latitude, and longitude, and then by name of source. Also given are GEOTHERM record identifier, and temperature (/sup 0/C).

  4. OPTIMIZATION OF HYBRID GEOTHERMAL HEAT PUMP SYSTEMS Scott Hackel, Graduate Research Assistant; Gregory Nellis, Professor; Sanford Klein,

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    1 OPTIMIZATION OF HYBRID GEOTHERMAL HEAT PUMP SYSTEMS Scott Hackel, Graduate Research Assistant, Madison, WI, United States Abstract: Hybrid ground-coupled heat pump systems (HyGCHPs) couple conventional ground- coupled heat pump (GCHP) equipment with supplemental heat rejection or extraction systems

  5. Hawaii's Geothermal Development

    SciTech Connect (OSTI)

    Uemura, Roy T.

    1980-12-01

    On July 2, 1976, an event took place in the desolate area of Puna, on the island of Hawaii, which showed great promise of reducing Hawaii's dependence on fuel oil. This great event was the flashing of Hawaii's first geothermal well which was named HGP-A. The discovery of geothermal energy was a blessing to Hawaii since the electric utilities are dependent upon fuel oil for its own electric generating units. Over 50% of their revenues pay for imported fuel oil. Last year (1979) about $167.1 million left the state to pay for this precious oil. The HGP-A well was drilled to a depth of 6450 feet and the temperature at the bottom of the hole was measured at 676 F, making it one of the hottest wells in the world.

  6. Geothermal Progress Monitor 12

    SciTech Connect (OSTI)

    1990-12-01

    Some of the more interesting articles in this GPM are: DOE supporting research on problems at The Geysers; Long-term flow test of Hot Dry Rock system (at Fenton Hill, NM) to begin in Fiscal Year 1992; Significant milestones reached in prediction of behavior of injected fluids; Geopressured power generation experiment yields good results. A number of industry-oriented events and successes are reported, and in that regard it is noteworthy that this report comes near the end of the most active decade of geothermal power development in the U.S. There is a table of all operating U.S. geothermal power projects. The bibliography of research reports at the end of this GPM is useful. (DJE 2005)

  7. SILICA FOULING BY GEOTHERMAL PART III SILICA FOULING BY GEOTHERMAL WATERS

    E-Print Network [OSTI]

    Gudmundsson, Jon Steinar

    PART III SILICA FOULING BY GEOTHERMAL WATERS #12;- 49 - PART III SILICA FOULING BY GEOTHERMAL WATERS 1. INTRODUCTION In recent years the world-wide interest in geothermal energy has been stimulated in geothermal engineering; that of deposition and fouling. Presently, geothermal waters containing useful energy

  8. Federal Interagency Geothermal Activities

    SciTech Connect (OSTI)

    Anderson, Arlene; Prencipe, Loretta; Todaro, Richard M.; Cuyler, David; Eide, Elizabeth

    2011-06-01

    This collaborative document describes the roles and responsibilities of key Federal agencies in the development of geothermal technologies including the U.S. Department of Energy (DOE); the U.S. Department of Agriculture (USDA), including the U.S. Forest Service; the U.S. Department of Interior (DOI), including the United States Geological Survey (USGS) and Bureau of Land Management (BLM); the Environmental Protection Agency (EPA); and the Department of Defense (DOD).

  9. Geothermal Success Stories

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof Energy Services »Information1 Geothermal Success Stories en Percussive

  10. Geothermal Technologies Office

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof Energy Services »Information1 Geothermal Success Stories ennear-term 8

  11. Geothermal Technologies Office: Publications

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof Energy Services »Information1 Geothermal SuccessInformation Resources

  12. PROCEEDINGS, Thirty-Fourth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, February 9-11, 2009

    E-Print Network [OSTI]

    Stanford University

    , Stanford, California, February 9-11, 2009 SGP-TR-187 DISTRICT HEATING MODELLING AND SIMULATION Lei Haiyan1 air pollution and save conventional energy, geothermal energy as a heat source for district heating. This paper describes the geothermal resource and district heating system in Tianjin. Heat load for one sample

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

    E-Print Network [OSTI]

    Stanford University

    geothermal resource in the US Gulf of Mexico region. In particular, geopressured sandstones near salt domes are potential sources of geothermal energy because salt diapirs with high thermal conductivity may pierce many low- grade geopressured systems subcommercial. These include a necessity to drill multiple wells

  14. GEOTHERMAL POWER GENERATION PLANT

    SciTech Connect (OSTI)

    Boyd, Tonya

    2013-12-01

    Oregon Institute of Technology (OIT) drilled a deep geothermal well on campus (to 5,300 feet deep) which produced 196oF resource as part of the 2008 OIT Congressionally Directed Project. OIT will construct a geothermal power plant (estimated at 1.75 MWe gross output). The plant would provide 50 to 75 percent of the electricity demand on campus. Technical support for construction and operations will be provided by OIT’s Geo-Heat Center. The power plant will be housed adjacent to the existing heat exchange building on the south east corner of campus near the existing geothermal production wells used for heating campus. Cooling water will be supplied from the nearby cold water wells to a cooling tower or air cooling may be used, depending upon the type of plant selected. Using the flow obtained from the deep well, not only can energy be generated from the power plant, but the “waste” water will also be used to supplement space heating on campus. A pipeline will be construction from the well to the heat exchanger building, and then a discharge line will be construction around the east and north side of campus for anticipated use of the “waste” water by facilities in an adjacent sustainable energy park. An injection well will need to be drilled to handle the flow, as the campus existing injection wells are limited in capacity.

  15. Earthquake and Geothermal Energy

    E-Print Network [OSTI]

    Kapoor, Surya Prakash

    2013-01-01

    The origin of earthquake has long been recognized as resulting from strike-slip instability of plate tectonics along the fault lines. Several events of earthquake around the globe have happened which cannot be explained by this theory. In this work we investigated the earthquake data along with other observed facts like heat flow profiles etc... of the Indian subcontinent. In our studies we found a high-quality correlation between the earthquake events, seismic prone zones, heat flow regions and the geothermal hot springs. As a consequence, we proposed a hypothesis which can adequately explain all the earthquake events around the globe as well as the overall geo-dynamics. It is basically the geothermal power, which makes the plates to stand still, strike and slip over. The plates are merely a working solid while the driving force is the geothermal energy. The violent flow and enormous pressure of this power shake the earth along the plate boundaries and also triggers the intra-plate seismicity. In the light o...

  16. Conceptual Model At Valles Caldera - Redondo Geothermal Area...

    Open Energy Info (EERE)

    Geothermal Area (Gardner, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Conceptual Model At Valles Caldera - Redondo Geothermal Area...

  17. Conceptual Model At Valles Caldera - Sulphur Springs Geothermal...

    Open Energy Info (EERE)

    Geothermal Area (Gardner, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Conceptual Model At Valles Caldera - Sulphur Springs Geothermal...

  18. Reconnaissance geothermal exploration at Raft River, Idaho from...

    Open Energy Info (EERE)

    library Journal Article: Reconnaissance geothermal exploration at Raft River, Idaho from thermal infrared scanning Abstract GEOTHERMAL ENERGY; GEOTHERMAL FIELDS; INFRARED SURVEYS;...

  19. Thermal Gradient Holes At Neal Hot Springs Geothermal Area (U...

    Open Energy Info (EERE)

    Thermal Gradient Holes At Neal Hot Springs Geothermal Area (U.S. Geothermal Inc., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal...

  20. INJECTION AND THERMAL BREAKTHROUGH IN FRACTURED GEOTHERMAL RESERVOIRS

    E-Print Network [OSTI]

    Bodvarsson, Gudmundur S.

    2012-01-01

    Applications & Operations, Geothermal Energy Division of theP. , and Otte, C. , Geothermal energy: Stanford, California,Applications & Operations, Geothermal Energy Division of the