National Library of Energy BETA

Sample records for geothermal electric photovoltaics

  1. GETEM -Geothermal Electricity Technology Evaluation Model | Department...

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

    GETEM -Geothermal Electricity Technology Evaluation Model GETEM -Geothermal Electricity Technology Evaluation Model A guide to providing input to GETEM, the Geothermal Electricity ...

  2. Geothermal Electricity Production Basics | NREL

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

    Electricity Production Basics Geothermal power plants use steam produced from reservoirs of hot water found a few miles or more below the Earth's surface to produce electricity. The steam rotates a turbine that activates a generator, which produces electricity. There are three types of geothermal power plants: dry steam, flash steam, and binary cycle. Photo of a geothermal power plant. This geothermal power plant generates electricity for the Imperial Valley in California. Dry Steam Dry steam

  3. Geothermal Electricity Production Basics

    Broader source: Energy.gov [DOE]

    Heat from the earth—geothermal energy—heats water that has seeped into underground reservoirs. These reservoirs can be tapped for a variety of uses, depending on the temperature of the water. The energy from high-temperature reservoirs (225°-600°F) can be used to produce electricity.

  4. Geothermal Electric | Open Energy Information

    Open Energy Info (EERE)

    Reference needed Missing content Broken link Other Additional Comments Cancel Submit Categories: Articles with outstanding TODO tasks Geothermal Electricity Generating Technologies...

  5. Salem Electric- Photovoltaic Rebate Program

    Broader source: Energy.gov [DOE]

    Salem Electric offers a rebate to residential customers who install solar photovoltaic (PV) systems. The rebate offered is $600 for the first three kilowatts (kWs) installed and $300/kW for any...

  6. Geothermal Electricity Technology Evaluation Model (GETEM) Development...

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

    Electricity Technology Evaluation Model (GETEM) Development Geothermal Electricity Technology Evaluation Model (GETEM) Development Project objective: Provide a tool for estimating...

  7. Geothermal Electricity Technology Evaluation Model (GETEM) Development;

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

    2010 Geothermal Technology Program Peer Review Report | Department of Energy Development; 2010 Geothermal Technology Program Peer Review Report Geothermal Electricity Technology Evaluation Model (GETEM) Development; 2010 Geothermal Technology Program Peer Review Report DOE 2010 Geothermal Technologies Program Peer Review adse_001_mines.pdf (193.89 KB) More Documents & Publications Systems Engineering; 2010 Geothermal Technology Program Peer Review Report National Geothermal Student

  8. Rural Cooperative Geothermal Development Electric & Agriculture |

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

    Department of Energy Rural Cooperative Geothermal Development Electric & Agriculture Rural Cooperative Geothermal Development Electric & Agriculture DOE 2010 Geothermal Program Peer Review; Low Temperature Demonstration Projects low_silveria_rural_electric_coop.pdf (557.69 KB) More Documents & Publications Southwest Alaska Regional Geothermal Energy Project District Wide Geothermal Heating Conversion Blaine County School District Novel Energy Conversion Equipment for Low

  9. Policy Makers' Guidebook for Geothermal Electricity Generation...

    Open Energy Info (EERE)

    Electricity Generation Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Policy Makers' Guidebook for Geothermal Electricity Generation AgencyCompany Organization:...

  10. Sandia-Electric Power Research Institute Partnership Publishes Photovoltaic

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

    Reliability Report Electric Power Research Institute Partnership Publishes Photovoltaic Reliability Report - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid

  11. Ashland Electric Utility - Photovoltaic Rebate Program | Department...

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

    The City of Ashland Conservation Division offers electric customers installing photovoltaic systems a rebate of either 0.50 per watt (residential) or 0.75 per watt...

  12. Electrical Resistivity At Coso Geothermal Area (1972) | Open...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Electrical Resistivity At Coso Geothermal Area (1972) Exploration Activity Details Location...

  13. Policymakers' Guidebook for Geothermal Electricity Generation (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2011-02-01

    This document provides an overview of the NREL Geothermal Policymakers' Guidebook for Electricity Generation with information directing people to the Web site for more in-depth information.

  14. Rural Cooperative Geothermal Development Electric & Agriculture

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

    ... Project ManagementCoordination * Surprise Valley Electric management and staff is ... Project Coordinator anytime significant event occurs 10 | US DOE Geothermal Program ...

  15. Low Capital Photovoltaic Panel Electrical Output-Booster System...

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

    Low Capital Photovoltaic Panel Electrical Output-Booster System Low Capital Photovoltaic Panel Electrical Output-Booster System This presentation summarizes the information given ...

  16. Photovoltaic Electrical Contact and Cell Coating Basics | Department...

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

    Electrical Contact and Cell Coating Basics Photovoltaic Electrical Contact and Cell Coating Basics August 19, 2013 - 4:12pm Addthis The outermost layers of photovoltaic (PV) cell, ...

  17. Cixi Renhe Photovoltaic Electrical Appliance Co Ltd | Open Energy...

    Open Energy Info (EERE)

    Cixi Renhe Photovoltaic Electrical Appliance Co Ltd Jump to: navigation, search Name: Cixi Renhe Photovoltaic Electrical Appliance Co Ltd Place: Cixi, Zhejiang Province, China Zip:...

  18. GETEM -Geothermal Electricity Technology Evaluation Model

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

    1 GETEM -Geothermal Electricity Technology Evaluation Model Background: GETEM was originally developed for the Department of Energy's Geothermal Technologies Program to provide both a method for quantifying the power generation cost from geothermal energy, and a means of assessing how technology advances might impact those generation costs. Generation cost is determined as the Levelized-Cost-of-Electricity (LCOE). The model is intended to provide representative estimates of cost and performance

  19. Cost Competitive Electricity from Photovoltaic Concentrators Called

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

    'Imminent' - News Releases | NREL Cost Competitive Electricity from Photovoltaic Concentrators Called 'Imminent' July 13, 2005 Golden, Colo. - Solar concentrators using highly efficient photovoltaic solar cells will reduce the cost of electricity from sunlight to competitive levels soon, attendees were told at a recent international conference on the subject. Herb Hayden of Arizona Public Service (APS) and Robert McConnell and Martha Symko-Davies of the U.S. Department of Energy's National

  20. Geothermal Electricity Technology Evaluation Model | Department of Energy

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

    Geothermal Electricity Technology Evaluation Model Geothermal Electricity Technology Evaluation Model The Geothermal Technologies Office has uploaded an updated version of the Geothermal Electricity Technology Evaluation Model (GETEM) provided by Idaho National Laboratory. GETEM is an Excel-based tool used to estimate the Levelized Cost of Energy for definable geothermal scenarios. Electrical power generation is the sole geothermal use considered by GETEM and does not provide assessment

  1. Photovoltaics: solar electric power systems

    SciTech Connect (OSTI)

    1980-02-01

    The operation and uses of solar cells and the National Photovoltaic Program are briefly described. Eleven DOE photovoltaic application projects are described including forest lookout towers; Wilcox Memorial Hospital in Hawaii; WBNO daytime AM radio station; Schuchuli Indian Village; Meade, Nebraska, agricultural experiment; Mt. Laguna Air Force Station; public schools and colleges; residential applications; and Sea World of Florida. (WHK)

  2. NREL: Learning - Geothermal Electricity Production Basics

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

    Geothermal power plants use steam produced from reservoirs of hot water found a few miles or more below the Earth's surface to produce electricity. The steam rotates a turbine that ...

  3. Chena Hot Springs Resort - Electric Power Generation Using Geothermal...

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

    Generation Using Geothermal Fluid Coproduced from Oil andor Gas Wells Chena Hot Springs Resort - Electric Power Generation Using Geothermal Fluid Coproduced from Oil andor Gas ...

  4. Employment Impacts of Geothermal Electric Projects Entingh, Daniel...

    Office of Scientific and Technical Information (OSTI)

    Employment Impacts of Geothermal Electric Projects Entingh, Daniel J. 15 GEOTHERMAL ENERGY; 24 POWER TRANSMISSION AND DISTRIBUTION; CAPITAL; CONSTRUCTION; EMPLOYMENT; EXPLORATION;...

  5. GETEM - Geothermal Electricity Technology Evaluation Model | Department of

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

    Energy GETEM - Geothermal Electricity Technology Evaluation Model GETEM - Geothermal Electricity Technology Evaluation Model A 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 Energy in estimating some of the technical and economic values of its rese geothermal_electricity_technology_evaluation_model_2012.pdf (665.87 KB) More Documents & Publications U.S. DOE

  6. GETEM -Geothermal Electricity Technology Evaluation Model | Department of

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

    Energy -Geothermal Electricity Technology Evaluation Model GETEM -Geothermal Electricity Technology Evaluation Model A 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 Energy in estimating some of the technical and economic values of its research projects and subprograms. The tool is intended to estimate and summarize the performance and cost of various geothermal

  7. Recovery Act:Rural Cooperative Geothermal development Electric &

    Office of Scientific and Technical Information (OSTI)

    Agriculture (Technical Report) | SciTech Connect Technical Report: Recovery Act:Rural Cooperative Geothermal development Electric & Agriculture Citation Details In-Document Search Title: Recovery Act:Rural Cooperative Geothermal development Electric & Agriculture Surprise Valley Electric, a small rural electric cooperative serving northeast California and southern Oregon, developed a 3mw binary geothermal electric generating plant on a cooperative member's ranch. The geothermal

  8. Geothermal Electrical Production CO2 Emissions Study

    SciTech Connect (OSTI)

    K. K. Bloomfield; J. N. Moore

    1999-10-01

    Emission of �greenhouse gases� into the environment has become an increasing concern. Deregulation of the electrical market will allow consumers to select power suppliers that utilize �green power.� Geothermal power is classed as �green power� and has lower emissions of carbon dioxide per kilowatt-hour of electricity than even the cleanest of fossil fuels, natural gas. However, previously published estimates of carbon dioxide emissions are relatively old and need revision. This study estimates that the average carbon dioxide emissions from geothermal and fossil fuel power plants are: geothermal 0.18 , coal 2.13, petroleum 1.56 , and natural gas 1.03 pounds of carbon dioxide per kilowatt-hour respectively.

  9. Geothermal Electrical Production CO2 Emissions Study

    SciTech Connect (OSTI)

    Bloomfield, Kevin Kit; Moore, J. N.

    1999-10-01

    Emission of “greenhouse gases” into the environment has become an increasing concern. Deregulation of the electrical market will allow consumers to select power suppliers that utilize “green power.” Geothermal power is classed as “green power” and has power emissions of carbon dioxide per kilowatt-hour of electricity than even the cleanest of fossil fuels, natural gas. However, previously published estimates of carbon dioxide emissions are relatively old and need revision. This study estimates that the average carbon dioxide emissions from geothermal and fossil fuel power plants are: geothermal 0.18 , coal 2.13, petroleum 1.56 , and natural gas 1.03 pounds of carbon dioxide per kilowatt-hour respectively.

  10. Development of an Innovative Plug and Play Photovoltaic Electric System |

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

    Department of Energy Development of an Innovative Plug and Play Photovoltaic Electric System Development of an Innovative Plug and Play Photovoltaic Electric System logo_freedm.jpg North Carolina State University FREEDM Systems Engineering Center and its partners, under the Plug-and-Play Photovoltaics FOA, are performing analysis, design, and innovation to address each stage in the value chain of grid-interactive residential photovoltaic (PV) systems, while taking a broader systems

  11. Application Of Geothermal Energy To The Supply Of Electricity...

    Open Energy Info (EERE)

    Geothermal Energy To The Supply Of Electricity In Rural Areas Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Application Of Geothermal Energy...

  12. Oncor Electric Delivery - Solar Photovoltaic Standard Offer Program...

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

    Summary Oncor Electric Delivery offers rebates to its customers that install photovoltaic (PV) systems on homes or other buildings.* Oncor customers of all rate classes...

  13. Low-temperature Stirling Engine for Geothermal Electricity Generation

    Office of Scientific and Technical Information (OSTI)

    (Technical Report) | SciTech Connect Low-temperature Stirling Engine for Geothermal Electricity Generation Citation Details In-Document Search Title: Low-temperature Stirling Engine for Geothermal Electricity Generation Up to 2700 terawatt-hours per year of geothermal electricity generation capacity has been shown to be available within North America, typically with wells drilled into geologically active regions of the earth's crust where this energy is concentrated (Huttrer, 2001). Of this

  14. A study of geothermal drilling and the production of electricity from geothermal energy

    SciTech Connect (OSTI)

    Pierce, K.G.; Livesay, B.J.

    1994-01-01

    This report gives the results of a study of the production of electricity from geothermal energy with particular emphasis on the drilling of geothermal wells. A brief history of the industry, including the influence of the Public Utilities Regulatory Policies Act, is given. Demand and supply of electricity in the United States are touched briefly. The results of a number of recent analytical studies of the cost of producing electricity are discussed, as are comparisons of recent power purchase agreements in the state of Nevada. Both the costs of producing electricity from geothermal energy and the costs of drilling geothermal wells are analyzed. The major factors resulting in increased cost of geothermal drilling, when compared to oil and gas drilling, are discussed. A summary of a series of interviews with individuals representing many aspects of the production of electricity from geothermal energy is given in the appendices. Finally, the implications of these studies are given, conclusions are presented, and program recommendations are made.

  15. List of Geothermal Electric Incentives | Open Energy Information

    Open Energy Info (EERE)

    Coal with CCS Concentrating Solar Power Energy Storage Fuel Cells Geothermal Electric Natural Gas Nuclear Tidal Energy Wave Energy Wind energy BiomassBiogas Hydroelectric...

  16. Progress Report on Electrical Resistivity Studies Coso Geothermal...

    Open Energy Info (EERE)

    Report on Electrical Resistivity Studies Coso Geothermal Area Inyo County California Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Progress Report on...

  17. Progress report on electrical resistivity studies, COSO Geothermal...

    Open Energy Info (EERE)

    report on electrical resistivity studies, COSO Geothermal Area, Inyo County, California Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Progress report...

  18. Geothermal Electric Plant Planned in N.M.

    Office of Energy Efficiency and Renewable Energy (EERE)

    Publicly traded Raser Technologies Inc. of Provo, Utah, said Wednesday that it is planning to build New Mexico's first commercial geothermal electric generation plant.

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

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

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

  20. Geothermal

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

    Geothermal Louise Vickery, General Manager, Renewable Futures at the Australian Renewable Energy Agency (ARENA). Permalink Gallery Australian Renewable-Energy Official Visits Sandia Concentrating Solar Power, EC, Energy, Geothermal, News, News & Events, Photovoltaic, Renewable Energy, Solar, Water Power, Wind Energy Australian Renewable-Energy Official Visits Sandia Louise Vickery, General Manager, Renewable Futures at the Australian Renewable Energy Agency (ARENA). At the end of June,

  1. Research Initiative Will Demonstrate Low Temperature Geothermal Electrical

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

    Power Generation Systems Using Oilfield Fluids | Department of Energy Research Initiative Will Demonstrate Low Temperature Geothermal Electrical Power Generation Systems Using Oilfield Fluids Research Initiative Will Demonstrate Low Temperature Geothermal Electrical Power Generation Systems Using Oilfield Fluids October 6, 2009 - 1:51pm Addthis The U.S. Department of Energy's (DOE) Geothermal Technologies Office (GTO) is announcing a new collaboration with the Office of Fossil Energy (FE) to

  2. List of Geothermal Heat Pumps Incentives | Open Energy Information

    Open Energy Info (EERE)

    using Renewable Fuels Geothermal Electric Ground Source Heat Pumps Hydroelectric energy Hydrogen Landfill Gas Methanol Passive Solar Space Heat Photovoltaics Solar Space Heat...

  3. New Hampshire Electric Co-op- Solar Photovoltaic Incentive Program

    Broader source: Energy.gov [DOE]

    New Hampshire Electric Co-op (NHEC) is offering rebates for residential and commercial/government grid-tied solar photovoltaic (PV) systems up to one megawatt (MW) in capacity. The rebate is equal...

  4. Two earth sheltered passive solar residences with photovoltaic electricity

    SciTech Connect (OSTI)

    Strong, S.J.; Osten, R.J. Jr.

    1980-01-01

    The design and construction of two earth sheltered passive solar residence with photovoltaic electricity are described. The sizing and design of the P.V. system as well as the module fabrication and array integration are also discussed.

  5. Chena Hot Springs Resort - Electric Power Generation Using Geothermal Fluid

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

    Coproduced from Oil and/or Gas Wells | Department of Energy Chena Hot Springs Resort - Electric Power Generation Using Geothermal Fluid Coproduced from Oil and/or Gas Wells Chena Hot Springs Resort - Electric Power Generation Using Geothermal Fluid Coproduced from Oil and/or Gas Wells Chena Hot Springs Resort project presentation at the 2013 peer review meeting in Colorado. chenahotsprings_peerreview2013.pdf (798.26 KB) More Documents & Publications Electrical Power Generation Using

  6. Low Capital Photovoltaic Panel Electrical Output-Booster System |

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

    Department of Energy Low Capital Photovoltaic Panel Electrical Output-Booster System Low Capital Photovoltaic Panel Electrical Output-Booster System This presentation summarizes the information given during the DOE SunShot Grand Challenge: Summit and Technology Forum, June 13-14, 2012. ssgrandchallenge_finance_schrag.pdf (63.07 KB) More Documents & Publications The SunShot Vision Study SunShot Vision Study: February 2012 (Book), SunShot, Energy Efficiency & Renewable Energy (EERE)

  7. Photovoltaic power systems and the National Electrical Code: Suggested practices

    SciTech Connect (OSTI)

    Wiles, J.

    1996-12-01

    This guide provides information on how the National Electrical Code (NEC) applies to photovoltaic systems. The guide is not intended to supplant or replace the NEC; it paraphrases the NEC where it pertains to photovoltaic systems and should be used with the full text of the NEC. Users of this guide should be thoroughly familiar with the NEC and know the engineering principles and hazards associated with electrical and photovoltaic power systems. The information in this guide is the best available at the time of publication and is believed to be technically accurate; it will be updated frequently. Application of this information and results obtained are the responsibility of the user.

  8. Geothermal Energy for Production of Heat and Electricity Economically Simulated

    Energy Science and Technology Software Center (OSTI)

    2015-02-28

    GEOPHIRES is a software tool to investigate technical and economic performance of a geothermal system. Possible end-use options are electricity, direct-use heat and co-generation.

  9. Misinterpretation of Electrical Resistivity Data in Geothermal...

    Open Energy Info (EERE)

    T.G. Caldwell and S.L. Bennie Conference World Geothermal Congress 2005; Antalya, Turkey; 20050424 Published ?, 2005 DOI Not Provided Check for DOI availability: http:...

  10. Employment Impacts of Geothermal Electric Projects (Technical...

    Office of Scientific and Technical Information (OSTI)

    These include jobs during the 5 to 10 years of exploration and construction activities ... AND DISTRIBUTION; CAPITAL; CONSTRUCTION; EMPLOYMENT; EXPLORATION; GEOTHERMAL ...

  11. Geothermal Electricity Technology Evaluation Model (GETEM) Development

    Office of Energy Efficiency and Renewable Energy (EERE)

    Project objective: Provide a tool for estimating the performance and contributions of all phases of a geothermal project to power generation costs.

  12. Policymakers' Guidebook for Geothermal Electricity Generation...

    Open Energy Info (EERE)

    process. Highlights "This document identifies and describes five steps for implementing geothermal policies that may reduce barriers and result in deployment and implementation...

  13. Geothermal Technologies Available for Licensing - Energy Innovation Portal

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

    Geothermal Site Map Printable Version Share this resource About Search Categories (15) Advanced Materials Biomass and Biofuels Building Energy Efficiency Electricity Transmission Energy Analysis Energy Storage Geothermal Marketing Summaries (11) Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial Technologies Solar Photovoltaic Solar Thermal Startup America Vehicles and Fuels Wind Energy Partners (27) Visual Patent Search Success Stories Browse Geothermal Marketing Summaries Geothermal

  14. Photovoltaic module electrical termination design requirement study. Final report

    SciTech Connect (OSTI)

    Mosna, F.J. Jr.; Donlinger, J.

    1980-07-01

    Motorola Inc., in conjunction with ITT Cannon, has conducted a study to develop information to facilitate the selection of existing, commercial, electrical termination hardware for photovoltaic modules and arrays. Details of the study are presented in this volume. Module and array design parameters were investigated and recommendations were developed for use in surveying, evaluating, and comparing electrical termination hardware. Electrical termination selection criteria factors were developed and applied to nine generic termination types in each of the four application sectors. Remote, residential, intermediate and industrial. Existing terminations best suited for photovoltaic modules and arrays were identified. Cost information was developed to identify cost drivers and/or requirements which might lead to cost reductions. The general conclusion is that there is no single generic termination that is best suited for photovoltaic application, but that the appropriate termination is strongly dependent upon the module construction and its support structure as well as the specific application sector.

  15. Delaware Electric Cooperative- Green Energy Program Incentives

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Delaware Electric Cooperative (DEC) provides incentives for solar photovoltaic (PV), solar thermal, wind, fuel cells, and geothermal installed by DEC member-owners. Eligibility is limited to ...

  16. Small geothermal electric systems for remote powering

    SciTech Connect (OSTI)

    Entingh, Daniel J.; Easwaran, Eyob.; McLarty, Lynn

    1994-08-08

    This report describes conditions and costs at which quite small (100 to 1,000 kilowatt) geothermal systems could be used for off-grid powering at remote locations. This is a first step in a larger process of determining locations and conditions at which markets for such systems could be developed. The results suggest that small geothermal systems offer substantial economic and environmental advantages for powering off-grid towns and villages. Geothermal power is most likely to be economic if the system size is 300 kW or greater, down to reservoir temperatures of 100{degree}C. For system sizes smaller than 300 kW, the economics can be favorable if the reservoir temperature is about 120{degree}C or above. Important markets include sites remote from grids in many developing and developed countries. Estimates of geothermal resources in many developing countries are shown.

  17. Improvements in geothermal electric power and silica production

    DOE Patents [OSTI]

    Hill, J.H.; Fulk, M.M.

    Electricity is generated from hot geothermal solution by extracting heat therefrom, mineral solids which form in a so cooled geothermal solution are separated to recover minerals and facilitate reinjection of the solution into the ground. The separated solids are treated to recover silica by addition of an acid (amorphous silica precipitates) or a base (other minerals precipitate and soulble silicates are formed which are subsequently precipitated by acid neutralization). If desired, after silica is separated, other minerals can be separated and recovered.

  18. Electrical Power Generation Using Geothermal Fluid Co-produced from Oil &

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

    Gas; 2010 Geothermal Technology Program Peer Review Report | Department of Energy Gas; 2010 Geothermal Technology Program Peer Review Report Electrical Power Generation Using Geothermal Fluid Co-produced from Oil & Gas; 2010 Geothermal Technology Program Peer Review Report DOE 2010 Geothermal Technologies Program Peer Review lowtemp_012_karl.pdf (247.08 KB) More Documents & Publications GRED Drilling Award … GRED III Phase II; 2010 Geothermal Technology Program Peer Review Report

  19. Policy Overview and Options for Maximizing the Role of Policy in Geothermal Electricity Development

    Broader source: Energy.gov [DOE]

    This report explores the effectiveness of the historical and current body of policies in terms of increased geothermal electricity development. Insights are provided into future policies that may drive the market to optimize development of available geothermal electricity resources.

  20. Advanced Electric Submersible Pump Design Tool for Geothermal Applications

    SciTech Connect (OSTI)

    Xuele Qi; Norman Turnquist; Farshad Ghasripoor

    2012-05-31

    Electrical Submersible Pumps (ESPs) present higher efficiency, larger production rate, and can be operated in deeper wells than the other geothermal artificial lifting systems. Enhanced Geothermal Systems (EGS) applications recommend lifting 300 C geothermal water at 80kg/s flow rate in a maximum 10-5/8-inch diameter wellbore to improve the cost-effectiveness. In this paper, an advanced ESP design tool comprising a 1D theoretical model and a 3D CFD analysis has been developed to design ESPs for geothermal applications. Design of Experiments was also performed to optimize the geometry and performance. The designed mixed-flow type centrifugal impeller and diffuser exhibit high efficiency and head rise under simulated EGS conditions. The design tool has been validated by comparing the prediction to experimental data of an existing ESP product.

  1. Proposed Changes to Electricity and Renewable (Photovoltaic)...

    Gasoline and Diesel Fuel Update (EIA)

    ... U.S. Energy Information Administration | 2017 Proposed Solar & Electricity Survey Form ... Fuel receipts and costs EIA-923: Natural gas receipts would no longer be reported by ...

  2. Use of Geothermal Energy for Electric Power Generation

    SciTech Connect (OSTI)

    Mashaw, John M.; Prichett, III, Wilson

    1980-10-23

    The National Rural Electric Cooperative Association and its 1,000 member systems are involved in the research, development and utilization of many different types of supplemental and alternative energy resources. We share a strong commitment to the wise and efficient use of this country's energy resources as the ultimate answer to our national prosperity and economic growth. WRECA is indebted to the United States Department of Energy for funding the NRECA/DOE Geothermal Workshop which was held in San Diego, California in October, 1980. We would also like to express our gratitude to each of the workshop speakers who gave of their time, talent and experience so that rural electric systems in the Western U. S. might gain a clearer understanding of the geothermal potential in their individual service areas. The participants were also presented with practical, expert opinion regarding the financial and technical considerations of using geothermal energy for electric power production. The organizers of this conference and all of those involved in planning this forum are hopeful that it will serve as an impetus toward the full utilization of geothermal energy as an important ingredient in a more energy self-sufficient nation. The ultimate consumer of the rural electric system, the member-owner, expects the kind of leadership that solves the energy problems of tomorrow by fully utilizing the resources at our disposal today.

  3. Conjugated ionomers for photovoltaic applications: electric field driven charge separation in organic photovoltaics. Final Technical report

    SciTech Connect (OSTI)

    Lonergan, Mark

    2015-05-29

    Final technical report for Conjugated ionomers for photovoltaic applications, electric field driven charge separation in organic photovoltaics. The central goal of the work we completed was been to understand the photochemical and photovoltaic properties of ionically functionalized conjugated polymers (conjugated ionomers or polyelectrolytes) and energy conversion systems based on them. We primarily studied two classes of conjugated polymer interfaces that we developed based either upon undoped conjugated polymers with an asymmetry in ionic composition (the ionic junction) or doped conjugated polymers with an asymmetry in doping type (the p-n junction). The materials used for these studies have primarily been the polyacetylene ionomers. We completed a detailed study of p-n junctions with systematically varying dopant density, photochemical creation of doped junctions, and experimental and theoretical work on charge transport and injection in polyacetylene ionomers. We have also completed related work on the use of conjugated ionomers as interlayers that improve the efficiency or organic photovoltaic systems and studied several important aspects of the chemistry of ionically functionalized semiconductors, including mechanisms of so-called "anion-doping", the formation of charge transfer complexes with oxygen, and the synthesis of new polyfluorene polyelectrolytes. We also worked worked with the Haley group at the University of Oregon on new indenofluorene-based organic acceptors.

  4. Photovoltaics and Electricity - Energy Explained, Your Guide To

    U.S. Energy Information Administration (EIA) Indexed Site

    Understanding Energy - Energy Information Administration Photovoltaics and Electricity Energy Explained - Home What Is Energy? Forms of Energy Sources of Energy Laws of Energy Units and Calculators Energy Conversion Calculators British Thermal Units (Btu) Degree-Days U.S. Energy Facts State and U.S. Territory Data Use of Energy In Industry For Transportation In Homes In Commercial Buildings Efficiency and Conservation Energy and the Environment Greenhouse Gases Effect on the Climate Where

  5. Economics of a Conceptual 75 MW Hot Dry Rock Geothermal Electric...

    Open Energy Info (EERE)

    Economics of a Conceptual 75 MW Hot Dry Rock Geothermal Electric Power-Station Abstract Man-made, hot dry rock (HDR) geothermal energy reservoirs have been investigated for over...

  6. Geothermal Electricity Technology Evaluation Model (GETEM) |...

    Open Energy Info (EERE)

    OpenEI Keyword(s): EERE tool Equivalent URI: cleanenergysolutions.orgcontentgeothermal-electricity-technology-eva Language: English Policies: Deployment Programs...

  7. Acoustic and electrical properties of Mexican geothermal rock samples

    SciTech Connect (OSTI)

    Contreras, E.A.; King, M.S.

    1984-12-01

    Acoustic compressional and shear-wave velocities have been measured on a suite of ten sandstone samples obtained from wells in the Cerro Prieto geothermal field and on two rock samples from other Mexican geothermal fields. The samples were tested in both their dry and fully brine-saturated states at uniaxial stresses to 15 MPa. Electrical resistivities and associated phase angles have been measured on the same core samples as a function of frequency in the range 10 Hz to 10/sup 5/ Hz under drained conditions at hydrostatic confining stresses to 10 MPa. The electrical properties were measured on samples tested in their fully saturated state, using brines of two different concentrations.

  8. Geothermal

    Office of Scientific and Technical Information (OSTI)

    Geothermal Geothermal Legacy Collection Search the Geothermal Legacy Collection Search For Terms: Find + Advanced Search Advanced Search All Fields: Title: Full Text: ...

  9. Un Seminar On The Utilization Of Geothermal Energy For Electric...

    Open Energy Info (EERE)

    Geothermics. () . Related Geothermal Exploration Activities Activities (3) Modeling-Computer Simulations (Ozkocak, 1985) Observation Wells (Ozkocak, 1985) Reflection Survey...

  10. U.S. DOE Geothermal Electricity Technology Evaluation Model (GETEM) Webinar Presentation

    Office of Energy Efficiency and Renewable Energy (EERE)

    This is the U.S. Department of Energy Geothermal Electricity Technology Evaluation Model (GETEM) webinar presentation on June 30, 2011 by Greg Mines, Idaho National Laboratory.

  11. Systems for Electrical Power from Coproduced and Low Temperature Geothermal Resources

    Broader source: Energy.gov [DOE]

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

  12. Electric Power Generation from Low-Temperature Geothermal Resources...

    Open Energy Info (EERE)

    1 Recovery Act: Geothermal Technologies Program Project Type Topic 2 Geothermal Energy Production from Low Temperature Resources, Coproduced Fluids from Oil and Gas Wells, and...

  13. Chapter 4: Advancing Clean Electric Power Technologies | Geothermal...

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

    Assessments Introduction Geothermal power taps into earth's internal heat as an energy source. While geothermal currently constitutes less than 1% of total U.S....

  14. Photovoltaics for municipal planners. Cost-effective municipal applications of photovoltaics for electric power

    SciTech Connect (OSTI)

    Not Available

    1993-04-01

    This booklet is intended for city and county government personnel, as well as community organizations, who deal with supplying, regulating, or recommending electric power resources. Specifically, this document deals with photovoltaic (PV) power, or power from solar cells, which is currently the most cost-effective energy source for electricity requirements that are relatively small, located in isolated areas, or difficult to serve with conventional technology. Recently, PV has been documented to be more cost-effective than conventional alternatives (such as line extensions or engine generators) in dozens of applications within the service territories of electric, gas, and communications utilities. Here, we document numerous cost-effective urban applications, chosen by planners and utilities because they were the most cost-effective option or because they were appropriate for environmental or logistical reasons. These applications occur within various municipal departments, including utility, parks and recreation, traffic engineering, transportation, and planning, and they include lighting applications, communications equipment, corrosion protection, irrigation control equipment, remote monitoring, and even portable power supplies for emergency situations.

  15. Photovoltaics

    SciTech Connect (OSTI)

    Solar Energy Technologies Program

    2010-09-28

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  16. Photovoltaics

    SciTech Connect (OSTI)

    Not Available

    2008-09-01

    Summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  17. Results of Electric Survey in the Area of Hawaii Geothermal Test...

    Open Energy Info (EERE)

    Electric Survey in the Area of Hawaii Geothermal Test Well HGP-A Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Results of Electric Survey in...

  18. Organic Photovoltaic Cells with an Electric Field Integrally-Formed at the

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

    Heterojunction Interface - Energy Innovation Portal Solar Photovoltaic Solar Photovoltaic Find More Like This Return to Search Organic Photovoltaic Cells with an Electric Field Integrally-Formed at the Heterojunction Interface National Renewable Energy Laboratory Brookhaven National Laboratory Contact NREL About This Technology Figure 4 Figure 4 Figure 6 Figure 6 Technology Marketing SummaryStandard solar cells made from inorganic semiconductors, such as silicon cells, have dominated the

  19. Photovoltaic

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

    Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas ...

  20. Photovoltaics

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

    Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas ...

  1. Geothermal

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

    Stationary Power/Energy Conversion Efficiency/Geothermal Geothermal Tara Camacho-Lopez 2016-03-16T19:31:15+00:00 geothermal_leamstest Sandia's work in drilling technology is aimed at reducing the cost and risk associated with drilling in harsh, subterranean environments. The historical focus of the drilling research has been directed at significantly expanding the nation's utilization of geothermal energy. This focus in geothermal related drilling research is the search for practical solutions

  2. 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.

  3. Purchase and Installation of a Geothermal Power Plant to Generate Electricity Using Geothermal Water Resources

    Broader source: Energy.gov [DOE]

    Project objectives: Demonstrate technical and financial feasibility of the use of an existing low-temperature geothermal resource for combined heat and power; and Maintain and enhance existing geothermal district heating operation.

  4. Chapter 4: Advancing Clean Electric Power Technologies | Geothermal Power Technology Assessment

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

    Geothermal Power Chapter 4: Technology Assessments Introduction Geothermal power taps into earth's internal heat as an energy source. While geothermal currently constitutes less than 1% of total U.S. electricity generation, 1 it is regionally much more significant in the western United States. Vast amounts of heat are contained in the interior of the earth from the slow decay of radioactive elements and the heat remaining from earth's formation. This heat flows to the surface at low rates

  5. CNEEC - Photovoltaics Tutorial by Prof. Clemens

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

    Photovoltaics

  6. Second Annual Electric Power Research Institute/Sandia Photovoltaic...

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

    Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, ... HomeConcentrating Solar Power, Distribution Grid Integration, Energy, Facilities, Grid ...

  7. Photovoltaic electric power applied to Unmanned Aerial Vehicles (UAV)

    SciTech Connect (OSTI)

    Geis, J.; Arnold, J.H.

    1994-09-01

    Photovoltaic electric-powered flight is receiving a great deal of attention in the context of the United States` Unmanned Aerial Vehicle (UAV) program. This paper addresses some of the enabling technical areas and their potential solutions. Of particular interest are the long-duration, high-altitude class of UAV`s whose mission it is to achieve altitudes between 60,000 and 100,000 feet, and to remain at those altitudes for prolonged periods performing various mapping and surveillance activities. Addressed herein are studies which reveal the need for extremely light-weight and efficient solar cells, high-efficiency electric motor-driven propeller modules, and power management and distribution control elements. Since the potential payloads vary dramatically in their power consumption and duty cycles, a typical load profile has been selected to provide commonality for the propulsion power comparisons. Since missions vary widely with respect to ground coverage requirements, from repeated orbiting over a localized target to long-distance routes over irregular terrain, the authors have also averaged the power requirements for on-board guidance and control power, as well as ground control and communication link utilization. In the context of the national technology reinvestment program, wherever possible they modeled components and materials which have been qualified for space and defense applications, yet are compatible with civilian UAV activities. These include, but are not limited to, solar cell developments, electric storage technology for diurnal operation, local and ground communications, power management and distribution, and control servo design. And finally, the results of tests conducted by Wright Laboratory on ultralight, highly efficient MOCVD GaAs solar cells purchased from EPI Materials Ltd. (EML) of the UK are presented. These cells were also used for modeling the flight characteristics of UAV aircraft.

  8. Integrating CO₂ storage with geothermal resources for dispatchable renewable electricity

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Buscheck, Thomas A.; Bielicki, Jeffrey M.; Chen, Mingjie; Sun, Yunwei; Hao, Yue; Edmunds, Thomas A.; Saar, Martin O.; Randolph, Jimmy B.

    2014-12-31

    We present an approach that uses the huge fluid and thermal storage capacity of the subsurface, together with geologic CO₂ storage, to harvest, store, and dispatch energy from subsurface (geothermal) and surface (solar, nuclear, fossil) thermal resources, as well as energy from electrical grids. Captured CO₂ is injected into saline aquifers to store pressure, generate artesian flow of brine, and provide an additional working fluid for efficient heat extraction and power conversion. Concentric rings of injection and production wells are used to create a hydraulic divide to store pressure, CO₂, and thermal energy. Such storage can take excess power frommore » the grid and excess/waste thermal energy, and dispatch that energy when it is demanded, enabling increased penetration of variable renewables. Stored CO₂ functions as a cushion gas to provide enormous pressure-storage capacity and displaces large quantities of brine, which can be desalinated and/or treated for a variety of beneficial uses.« less

  9. Integrating CO₂ storage with geothermal resources for dispatchable renewable electricity

    SciTech Connect (OSTI)

    Buscheck, Thomas A.; Bielicki, Jeffrey M.; Chen, Mingjie; Sun, Yunwei; Hao, Yue; Edmunds, Thomas A.; Saar, Martin O.; Randolph, Jimmy B.

    2014-12-31

    We present an approach that uses the huge fluid and thermal storage capacity of the subsurface, together with geologic CO₂ storage, to harvest, store, and dispatch energy from subsurface (geothermal) and surface (solar, nuclear, fossil) thermal resources, as well as energy from electrical grids. Captured CO₂ is injected into saline aquifers to store pressure, generate artesian flow of brine, and provide an additional working fluid for efficient heat extraction and power conversion. Concentric rings of injection and production wells are used to create a hydraulic divide to store pressure, CO₂, and thermal energy. Such storage can take excess power from the grid and excess/waste thermal energy, and dispatch that energy when it is demanded, enabling increased penetration of variable renewables. Stored CO₂ functions as a cushion gas to provide enormous pressure-storage capacity and displaces large quantities of brine, which can be desalinated and/or treated for a variety of beneficial uses.

  10. Geothermal Technologies | Open Energy Information

    Open Energy Info (EERE)

    Geothermal Technologies Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Geothermal Technologies Geothermal energy can be utilized for electricity or heating...

  11. U.S. Department of Energy Geothermal Electricity Technology Evaluation...

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

    spreadsheet model developed by the Geothermal Technologies Program to assess power generation costs and the potential for technology improvements to impact those generation...

  12. Flathead Electric Cooperative Facility Geothermal Heat Pump System Upgrade

    Broader source: Energy.gov [DOE]

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

  13. Electric Power Generation Using Geothermal Fluid Coproduced from...

    Open Energy Info (EERE)

    and PWPS are proving that geothermal energy productioncan coexist alongside current oil development operations.Chena Hot Springs Resort and UTRC have previously...

  14. Use Of Electrical Surveys For Geothermal Reservoir Characterization...

    Open Energy Info (EERE)

    geothermal reservoir characteristics. Authors Sabodh K. Garg, John W. Pritchett, Philip E. Wannamaker and Jim Combs Published GRC, 2007 DOI Not Provided Check for DOI...

  15. 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...

  16. Recovery Act:Rural Cooperative Geothermal development Electric...

    Office of Scientific and Technical Information (OSTI)

    The geothermal resource had been discovered in 1980 when the ranch was developing supplemental irrigation water wells. The 240F resource was used for irrigation until developed ...

  17. Photovoltaics

    SciTech Connect (OSTI)

    Ebisch, R.

    1981-07-01

    Applications of photovoltaics to non-residential buildings are discussed. Most of the projects underway represent a joint effort by DOE and fifteen manufacturing companies now offering or developing photovoltaics. The systems are either flat-plate arrays, in which the sunlight is received directly on the photocells, or concentrating systems, in which the sunlight is focused on the photocells by mirrors or lenses. The DOE price goal for 1986 is to have photovoltaic systems capable of supplying shopping centers, apartment complexes, and industries with modules costing 70 cents/W and systems costing $1.60 to $2.60/W with the price of power to the user at 7 cents to 11 cents/kWh. New technologies discussed include the use of silicon with no crystal structure and the use of ribbons of silicon. (MJF)

  18. Policy Overview and Options for Maximizing the Role of Policy in Geothermal Electricity Development

    SciTech Connect (OSTI)

    Doris, E.; Kreycik, C.; Young, K.

    2009-09-01

    Geothermal electricity production capacity has grown over time because of multiple factors, including its renewable, baseload, and domestic attributes; volatile and high prices for competing technologies; and policy intervention. Overarching federal policies, namely the Public Utilities Regulatory Policies Act (PURPA), provided certainty to project investors in the 1980s, leading to a boom in geothermal development. In addition to market expansion through PURPA, research and development policies provided an investment of public dollars toward developing technologies and reducing costs over time to increase the market competitiveness of geothermal electricity. Together, these efforts are cited as the primary policy drivers for the currently installed capacity. Informing policy decisions depends on the combined impacts of policies at the federal and state level on geothermal development. Identifying high-impact suites of policies for different contexts, and the government levels best equipped to implement them, would provide a wealth of information to both policy makers and project developers.

  19. Electrical Energy and Demand Savings from a Geothermal Heat Pump...

    Office of Scientific and Technical Information (OSTI)

    space-conditioning systems of an entire city (4,003 military family housing units) have been converted to geothermal heat pumps (GHPs) under an energy savings performance contract. ...

  20. Photovoltaic

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

    3 - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Energy Defense Waste Management Programs Advanced Nuclear Energy Nuclear

  1. Solar Photovoltaic Technologies - Energy Innovation Portal

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

    Technology Marketing Summaries Site Map Printable Version Share this resource About Search Categories (15) Advanced Materials Biomass and Biofuels Building Energy Efficiency Electricity Transmission Energy Analysis Energy Storage Geothermal Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial Technologies Solar Photovoltaic Marketing Summaries (132) Success Stories (5) Solar Thermal Startup America Vehicles and Fuels Wind Energy Partners (27) Visual Patent Search Success Stories Browse

  2. Effect of molecular electrical doping on polyfuran based photovoltaic cells

    SciTech Connect (OSTI)

    Yu, Shuwen; Opitz, Andreas; Salzmann, Ingo; Frisch, Johannes; Cohen, Erez; Bendikov, Michael; Koch, Norbert

    2015-05-18

    The electronic, optical, and morphological properties of molecularly p-doped polyfuran (PF) films were investigated over a wide range of doping ratio in order to explore the impact of doping in photovoltaic applications. We find evidence for integer-charge transfer between PF and the prototypical molecular p-dopant tetrafluoro-tetracyanoquinodimethane (F4TCNQ) and employed the doped polymer in bilayer organic solar cells using fullerene as acceptor. The conductivity increase in the PF films at dopant loadings ?2% significantly enhances the short-circuit current of photovoltaic devices. For higher doping ratios, however, F4TCNQ is found to precipitate at the heterojunction between the doped donor polymer and the fullerene acceptor. Ultraviolet photoelectron spectroscopy reveals that its presence acts beneficial to the energy-level alignment by doubling the open-circuit voltage of solar cells from 0.2?V to ca. 0.4?V, as compared to pristine PF.

  3. Photovoltaic Technology Basics | Department of Energy

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

    Addthis Related Articles Quiz: Test Your Solar IQ Energy 101: Solar Photovoltaics Photovoltaic Cell Basics Energy Basics Home Renewable Energy Biomass Geothermal Hydrogen & Fuel ...

  4. Impacts of Regional Electricity Prices and Building Type on the Economics of Commercial Photovoltaic Systems

    SciTech Connect (OSTI)

    Ong, S.; Campbell, C.; Clark, N.

    2012-12-01

    To identify the impacts of regional electricity prices and building type on the economics of solar photovoltaic (PV) systems, 207 rate structures across 77 locations and 16 commercial building types were evaluated. Results for expected solar value are reported for each location and building type. Aggregated results are also reported, showing general trends across various impact categories.

  5. Photovoltaic device having light transmitting electrically conductive stacked films

    DOE Patents [OSTI]

    Weber, Michael F.; Tran, Nang T.; Jeffrey, Frank R.; Gilbert, James R.; Aspen, Frank E.

    1990-07-10

    A light transmitting electrically conductive stacked film, useful as a light transmitting electrode, including a first light transmitting electrically conductive layer, having a first optical thickness, a second light transmitting layer, having a second optical thickness different from the optical thickness of the first layer, and an electrically conductive metallic layer interposed between and in initimate contact with the first and second layers.

  6. Geothermal Generation | Open Energy Information

    Open Energy Info (EERE)

    Geothermal Generation This article is a stub. You can help OpenEI by expanding it. Global Geothermal Energy Generation Global Geothermal Electricity Generation in 2007 (in millions...

  7. Geothermal Technologies | Open Energy Information

    Open Energy Info (EERE)

    to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Geothermal Technologies Geothermal energy can be utilized for electricity or heating in more than one way....

  8. Altheim geothermal Plant for electricity production by Organic Rankine Cycle turbogenerator

    SciTech Connect (OSTI)

    Pernecker, Gerhard; Ruhland, Johannes

    1996-01-24

    The paper describes the plan of the town Altheim in Upper Austria to produce electricity by an Organic Rankine Cycle-turbogenerator in the field of utilization of low temperatured thermal water. The aim of the project is to improve the technical and economic situation of the geothermal plant.

  9. Residential photovoltaics

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    The photovoltaics overview section of the Renewable Energy Technology Characterizations describes the technical and economic status of this emerging renewable energy option for electricity supply.

  10. Funding Opportunity: Geothermal Technologies Program Seeks Technologies to Reduce Levelized Cost of Electricity for Hydrothermal Development and EGS

    Broader source: Energy.gov [DOE]

    The Geothermal Technologies Program seeks non-prime mover technologies that have the potential to contribute to reducing the levelized cost of electricity from new hydrothermal development to 6¢/ kWh by 2020 and Enhanced Geothermal Systems (EGS) to 6¢/ kWh by 2030.

  11. Solar Photovoltaic Technologies Available for Licensing - Energy Innovation

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

    Portal Photovoltaic Site Map Printable Version Share this resource About Search Categories (15) Advanced Materials Biomass and Biofuels Building Energy Efficiency Electricity Transmission Energy Analysis Energy Storage Geothermal Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial Technologies Solar Photovoltaic Marketing Summaries (132) Success Stories (5) Solar Thermal Startup America Vehicles and Fuels Wind Energy Partners (27) Visual Patent Search Success Stories Browse Solar

  12. Geothermal resource base of the world: a revision of the Electric Power Research Institute's estimate

    SciTech Connect (OSTI)

    Aldrich, M.J.; Laughlin, A.W.; Gambill, D.T.

    1981-04-01

    Review of the Electric Power Research Institute's (EPRI) method for calculating the geothermal resource base of a country shows that modifications are needed for several of the assumptions used in the calculation. These modifications include: (1) separating geothermal belts into volcanic types with a geothermal gradient of 50{sup 0}C/km and complex types in which 80% of the area has a temperature gradient of 30{sup 0}C/km and 20% has a gradient of 45{sup 0}C/km, (2) using the actual mean annual temperature of a country rather than an assumed 15{sup 0}C average ambient temperature, and (3) making separate calculations for the resource stored in water/brine and that stored in rock. Comparison of this method (Revised EPRI) for calculating a geothermal resource base with other resource base estimates made from a heat flow map of Europe indicates that the technique yields reasonable values. The calculated geothermal resource bases, stored in water and rock to a depth of 5 km, for each country in the world are given. Approximately five times as much energy is stored in rock as is stored in water.

  13. Maximizing the Value of Photovoltaic Installations on Schools in California: Choosing the Best Electricity Rates

    SciTech Connect (OSTI)

    Ong, S.; Denholm, P.

    2011-07-01

    Schools in California often have a choice between multiple electricity rate options. For schools with photovoltaic (PV) installations, choosing the right rate is essential to maximize the value of PV generation. The rate option that minimizes a school?s electricity expenses often does not remain the most economical choice after the school installs a PV system. The complex interaction between PV generation, building load, and rate structure makes determining the best rate a challenging task. This report evaluates 22 rate structures across three of California?s largest electric utilities--Pacific Gas and Electric Co. (PG&E), Southern California Edison (SCE), and San Diego Gas and Electric (SDG&E)--in order to identify common rate structure attributes that are favorable to PV installations.

  14. Electrical resistivity and magnetic investigations of the geothermal systems in the Rotorua area, New Zealand

    SciTech Connect (OSTI)

    Bibby, H.M. ); Dawson, G.B.; Rayner, H.H.; Bennie, S.L.; Bromley, C.J. )

    1992-04-01

    This paper reports that electrical and magnetic data are used in an investigation of a 450 km{sup 2} region in order to delineate the Rotorua City Geothermal system and determine its relationship with other geothermal systems in the region. Three distinct regions of low ({lt}30 Omega m) apparent resistivity are delineated. The southern of these outlines the Rotorua City Geothermal System which has an area of about 18 km{sup 2}, with the northern third covered by Lake Rotorua. The boundary of the system is characterized by a rapid lateral change in apparent resistivity which can be modeled as a single, near vertical zone in which the distance between hot and cold water is very narrow. Magnetic properties also change in the vicinity of the discontinuity in some areas, consistent with hydrothermal alteration having destroyed the magnetite in the rocks of the geothermal system. Hot water is believed to be rising, driven by buoyancy forces across the whole of the low resistivity region. There is some indication, particularly in the south, that the boundary between hot and cold fluids dips away from the field. A second low resistivity zone (the East Lake Rotorua anomaly) with an area of about 8 km{sup 2}, is believed to outline a second independent geothermal system, with surface manifestations on Mokoia Island, and on the eastern shore of the lake. High heat flow in lake bottom sediments, and a reduction in magnetic signature over this region supports this conclusion. A third resistivity low under the west of Lake Rotorua has no associated thermal features and is believed to be a fossil hydrothermal system. There is no apparent relationship between the location of the geothermal systems and the Rotorua caldera. The aeromagnetic measurements have delineated several highly magnetic bodies which cannot be linked with surface geology. These are believed to be caused by buried rhyolite dome complexes at shallow depth.

  15. 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)

  16. Geothermal | Department of Energy

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

    Geothermal energy plant at The Geysers near Santa Rosa in Northern California, the world's largest electricity-generating geothermal development. | Photo courtesy of the National...

  17. Life Cycle analysis data and results for geothermal and other electricity generation technologies

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

    Sullivan, John

    2013-06-04

    Life cycle analysis (LCA) is an environmental assessment method that quantifies the environmental performance of a product system over its entire lifetime, from cradle to grave. Based on a set of relevant metrics, the method is aptly suited for comparing the environmental performance of competing products systems. This file contains LCA data and results for electric power production including geothermal power. The LCA for electric power has been broken down into two life cycle stages, namely plant and fuel cycles. Relevant metrics include the energy ratio and greenhouse gas (GHG) ratios, where the former is the ratio of system input energy to total lifetime electrical energy out and the latter is the ratio of the sum of all incurred greenhouse gases (in CO2 equivalents) divided by the same energy output. Specific information included herein are material to power (MPR) ratios for a range of power technologies for conventional thermoelectric, renewables (including three geothermal power technologies), and coproduced natural gas/geothermal power. For the geothermal power scenarios, the MPRs include the casing, cement, diesel, and water requirements for drilling wells and topside piping. Also included herein are energy and GHG ratios for plant and fuel cycle stages for the range of considered electricity generating technologies. Some of this information are MPR data extracted directly from the literature or from models (eg. ICARUS – a subset of ASPEN models) and others (energy and GHG ratios) are results calculated using GREET models and MPR data. MPR data for wells included herein were based on the Argonne well materials model and GETEM well count results.

  18. Life Cycle analysis data and results for geothermal and other electricity generation technologies

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

    Sullivan, John

    Life cycle analysis (LCA) is an environmental assessment method that quantifies the environmental performance of a product system over its entire lifetime, from cradle to grave. Based on a set of relevant metrics, the method is aptly suited for comparing the environmental performance of competing products systems. This file contains LCA data and results for electric power production including geothermal power. The LCA for electric power has been broken down into two life cycle stages, namely plant and fuel cycles. Relevant metrics include the energy ratio and greenhouse gas (GHG) ratios, where the former is the ratio of system input energy to total lifetime electrical energy out and the latter is the ratio of the sum of all incurred greenhouse gases (in CO2 equivalents) divided by the same energy output. Specific information included herein are material to power (MPR) ratios for a range of power technologies for conventional thermoelectric, renewables (including three geothermal power technologies), and coproduced natural gas/geothermal power. For the geothermal power scenarios, the MPRs include the casing, cement, diesel, and water requirements for drilling wells and topside piping. Also included herein are energy and GHG ratios for plant and fuel cycle stages for the range of considered electricity generating technologies. Some of this information are MPR data extracted directly from the literature or from models (eg. ICARUS a subset of ASPEN models) and others (energy and GHG ratios) are results calculated using GREET models and MPR data. MPR data for wells included herein were based on the Argonne well materials model and GETEM well count results.

  19. Surprise Valley Electrification Corp. Recovery Act: Rural Cooperative Geothermal Development Electric &

    Office of Scientific and Technical Information (OSTI)

    Surprise Valley Electrification Corp. Recovery Act: Rural Cooperative Geothermal Development Electric & Agriculture DE-EE0003006 Final Scientific Report Principal Investigator: E. Lynn Culp Team Members: Brad Kresge, General Manager Jane Eaton, Finance Manager SVEC Board of Directors Jeff Mann & Chun Chin, POWER Engineers Roy Mink, Geologist Silvio Pezzopane, Geologist January 12, 2016 Table of Contents Executive Summary 4 Project Objectives 6 Sustainable and Reliable Competitively

  20. Life Cycle analysis data and results for geothermal and other electricity generation technologies

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

    Sullivan, John

    2013-06-04

    Life cycle analysis (LCA) is an environmental assessment method that quantifies the environmental performance of a product system over its entire lifetime, from cradle to grave. Based on a set of relevant metrics, the method is aptly suited for comparing the environmental performance of competing products systems. This file contains LCA data and results for electric power production including geothermal power. The LCA for electric power has been broken down into two life cycle stages, namely plant and fuel cycles. Relevant metrics include the energy ratio and greenhouse gas (GHG) ratios, where the former is the ratio of system input energy to total lifetime electrical energy out and the latter is the ratio of the sum of all incurred greenhouse gases (in CO2 equivalents) divided by the same energy output. Specific information included herein are material to power (MPR) ratios for a range of power technologies for conventional thermoelectric, renewables (including three geothermal power technologies), and coproduced natural gas/geothermal power. For the geothermal power scenarios, the MPRs include the casing, cement, diesel, and water requirements for drilling wells and topside piping. Also included herein are energy and GHG ratios for plant and fuel cycle stages for the range of considered electricity generating technologies. Some of this information are MPR data extracted directly from the literature or from models (eg. ICARUS a subset of ASPEN models) and others (energy and GHG ratios) are results calculated using GREET models and MPR data. MPR data for wells included herein were based on the Argonne well materials model and GETEM well count results.

  1. Geothermal hydrothermal

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    The geothermal hydrothermal section of the Renewable Energy Technology Characterizations describes the technical and economic status of this emerging renewable energy option for electricity supply.

  2. Geothermal Basics | Department of Energy

    Energy Savers [EERE]

    Geothermal energy-geo (earth) + thermal (heat)-is heat ... including electricity generation, direct use, and heating ... Baseload-Geothermal power plants produce electricity ...

  3. Renewable Energy Technologies - Geothermal Energy

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

    Technologies Geothermal Energy Geothermal Energy Bruce Green, 303-275-3621, bruce_green@nrel.gov Geothermal Energy is Heat Geothermal Energy is Heat from the Earth. from the Earth. How Geothermal Energy is Used: *Electricity Generation *Direct Thermal Use *Geothermal Heat Pumps, also called Geoexchange Units or Ground-Coupled Heat Pumps. Courtesy of Geothermal Education Association Tectonic Plate Boundaries Tectonic Plate Boundaries Hottest Known Geothermal Hottest Known Geothermal Regions

  4. Geographic Variation in Potential of Rooftop Residential Photovoltaic Electric Power Production in the United States

    Broader source: Energy.gov [DOE]

    This paper describes a geographic evaluation of Zero Energy Home (ZEH) potential, specifically an assessment of residential roof-top solar electric photovoltaic (PV) performance around the United States and how energy produced would match up with very-efficient and super-efficient home designs. We performed annual simulations for 236 TMY2 data locations throughout the United States on two highly-efficient one-story 3-bedroom homes with a generic grid-tied solar electric 2kW PV system. These annual simulations show how potential annual solar electric power generation (kWh) and potential energy savings from PV power vary geographically around the U.S. giving the user in a specific region an indication of their expected PV system performance.

  5. Thermal and Electrical Effects of Partial Shade in Monolithic Thin-Film Photovoltaic Modules

    SciTech Connect (OSTI)

    Silverman, Timothy J.; Deceglie, Michael G.; Sun, Xingshu; Garris, Rebekah L.; Alam, Muhammad Ashraful; Deline, Chris; Kurtz, Sarah

    2015-06-14

    Photovoltaic cells can be damaged by reverse bias stress, which arises during service when a monolithically integrated thin-film module is partially shaded. We introduce a model for describing a module's internal thermal and electrical state, which cannot normally be measured. Using this model and experimental measurements, we present several results with relevance for reliability testing and module engineering: Modules with a small breakdown voltage experience less stress than those with a large breakdown voltage, with some exceptions for modules having light-enhanced reverse breakdown. Masks leaving a small part of the masked cells illuminated can lead to very high temperature and current density compared to masks covering entire cells.

  6. Thermal and Electrical Effects of Partial Shade in Monolithic Thin-Film Photovoltaic Modules: Preprint

    SciTech Connect (OSTI)

    Silverman, Timothy J.; Deceglie, Michael G.; Sun, Xingshu; Garris, Rebekah L.; Alam, Muhammad Ashraful; Deline, Chris; Kurtz, Sarah

    2015-09-02

    Photovoltaic cells can be damaged by reverse bias stress, which arises during service when a monolithically integrated thin-film module is partially shaded. We introduce a model for describing a module's internal thermal and electrical state, which cannot normally be measured. Using this model and experimental measurements, we present several results with relevance for reliability testing and module engineering: Modules with a small breakdown voltage experience less stress than those with a large breakdown voltage, with some exceptions for modules having light-enhanced reverse breakdown. Masks leaving a small part of the masked cells illuminated can lead to very high temperature and current density compared to masks covering entire cells.

  7. Technical Demonstration and Economic Validation of Geothermal-Produced Electricity from Coproduced Water at Existing Oil/Gas Wells in Texas

    Broader source: Energy.gov [DOE]

    Technical Demonstration and Economic Validation of Geothermal-Produced Electricity from Coproduced Water at Existing Oil/Gas Wells in Texas.

  8. Energy 101: Solar Photovoltaics | Department of Energy

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

    Solar Photovoltaics Energy 101: Solar Photovoltaics February 10, 2011 - 5:29pm Addthis Learn more about photovoltaic systems that convert light energy into electricity. Andy Oare ...

  9. Solar Photovoltaic Technology Basics | Department of Energy

    Energy Savers [EERE]

    Solar Solar Photovoltaic Technology Basics Solar Photovoltaic Technology Basics August ... Photovoltaic (PV) materials and devices convert sunlight into electrical energy. A single ...

  10. Electrical and photovoltaic characteristics of MoS{sub 2}/Si p-n junctions

    SciTech Connect (OSTI)

    Hao, Lanzhong Liu, Yunjie Gao, Wei; Han, Zhide; Xue, Qingzhong; Zeng, Huizhong; Wu, Zhipeng; Zhu, Jun; Zhang, Wanli

    2015-03-21

    Bulk-like molybdenum disulfide (MoS{sub 2}) thin films were deposited on the surface of p-type Si substrates using dc magnetron sputtering technique and MoS{sub 2}/Si p-n junctions were formed. The vibrating modes of E{sup 1}{sub 2g} and A{sub 1g} were observed from the Raman spectrum of the MoS{sub 2} films. The current density versus voltage (J-V) characteristics of the junction were investigated. A typical J-V rectifying effect with a turn-on voltage of 0.2 V was shown. In different voltage range, the electrical transporting of the junction was dominated by diffusion current and recombination current, respectively. Under the light illumination of 15 mW cm{sup −2}, the p-n junction exhibited obvious photovoltaic characteristics with a short-circuit current density of 3.2 mA cm{sup −2} and open-circuit voltage of 0.14 V. The fill factor and energy conversion efficiency were 42.4% and 1.3%, respectively. According to the determination of the Fermi-energy level (∼4.65 eV) and energy-band gap (∼1.45 eV) of the MoS{sub 2} films by capacitance-voltage curve and ultraviolet-visible transmission spectra, the mechanisms of the electrical and photovoltaic characteristics were discussed in terms of the energy-band structure of the MoS{sub 2}/Si p-n junctions. The results hold the promise for the integration of MoS{sub 2} thin films with commercially available Si-based electronics in high-efficient photovoltaic devices.

  11. Joint inversion of electrical and seismic data for Fracture char. and Imaging of Fluid Flow in Geothermal Systems

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

    Joint inversion of electrical and seismic data for Fracture char. and Imaging of Fluid Flow in Geothermal Systems Michael Batzle, PI Colorado School of Mines Track Name: Fluid Imaging Project Officer: Eric Hess Total Project Funding: $1,246, 579 April 22, 2013 This presentation does not contain any proprietary confidential, or otherwise restricted information. 2 | US DOE Geothermal Office eere.energy.gov Relevance/Impact of Research Project objectives * Use combined inversion of geophysical data

  12. What Changed in Article 690-Solar Photovoltaic Systems- of the 1999 National Electrical Code?

    SciTech Connect (OSTI)

    Bower, W.; Wiles, J.

    1999-01-12

    Article 690, Solar Photovoltaic Power Systems, has been in the National Electrical Code (NEC) since 1984. An NFPA-appointed Task Group for Article 690 proposed changes to Article 690 for both the 1996 and 1999 codes. The Task Group, supported by more than 50 professionals from throughout the photovoltaic (PV) industry, met seven times during the 1999 code cycle to integrate the needs of the industry with the needs of electrical inspectors and end users to ensure the safety of PV systems. The Task Group proposed 57 changes to Article 690, and all the changes were accepted in the review process. The performance and cost of PV installations were always a consideration as these changes were formed but safety was the number-one priority. All of the proposals were well substantiated and coordinated throughout the PV industry and with representatives of Underwriters Laboratories, Inc (UL). The most significant changes that were made in Article 690 for the 1999 NEC along with some of the rationale are discussed in the remainder of this article.

  13. Sandia Energy Photovoltaic

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

    feed 0 Sandian Contributes to Western Electricity Coordinating Council Photovoltaic Power Plant Model Validation Guideline http:energy.sandia.gov...

  14. Photovoltaic cell

    DOE Patents [OSTI]

    Gordon, Roy G.; Kurtz, Sarah

    1984-11-27

    In a photovoltaic cell structure containing a visibly transparent, electrically conductive first layer of metal oxide, and a light-absorbing semiconductive photovoltaic second layer, the improvement comprising a thin layer of transition metal nitride, carbide or boride interposed between said first and second layers.

  15. 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)

  16. An expanded review and comparison of greenhouse gas emissions from fossil fuel and geothermal electrical generating facilities

    SciTech Connect (OSTI)

    Booth, R.B.; Neil, P.E.

    1998-12-31

    This paper provides a review of the greenhouse gas emissions due to fossil fuel and geothermal electrical generation and to the emissions of their respective support activities. These support activities consist of, exploration, development, and transportation aspects of the fuel source, including waste management. These support activities could amount to an additional 6% for coal, 22% for oil, 13% for natural gas and 1% for geothermal. The presented methodologies and underlying principles can be used to better define the resultant emissions, rankings and global impacts of these electrical generating industries.

  17. Hot dry rock geothermal energy for U.S. electric utilities. Draft final report

    SciTech Connect (OSTI)

    Not Available

    1993-06-01

    In order to bring an electric utility component into the study of hot dry rock geothermal energy called for in the Energy Policy Act of 1992 (EPAct), EPRI organized a one-day conference in Philadelphia on January 14,1993. The conference was planned as the first day of a two-day sequence, by coordinating with the U.S. Geological Survey (USGS) and the U.S. Department of Energy (DOE). These two federal agencies were charged under EPAct with the development of a report on the potential for hot dry rock geothermal energy production in the US, especially the eastern US. The USGS was given lead responsibility for a report to be done in association with DOE. The EPRI conference emphasized first the status of technology development and testing in the U.S. and abroad, i.e., in western Europe, Russia and Japan. The conference went on to address the extent of knowledge regarding the resource base in the US, especially in the eastern half of the country, and then to address some practical business aspects of organizing projects or industries that could bring these resources into use, either for thermal applications or for electric power generation.

  18. Solar Photovoltaic Technology Basics | NREL

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

    Solar Photovoltaic Technology Basics Solar cells, also called photovoltaic (PV) cells by scientists, convert sunlight directly into electricity. PV gets its name from the process ...

  19. Electricity Bill Savings from Residential Photovoltaic Systems: Sensitivities to Changes in Future Electricity Market Conditions

    SciTech Connect (OSTI)

    Darghouth, Naim; Barbose, Galen; Wiser, Ryan

    2013-01-09

    This scoping study investigates the impact of, and interactions among, three key sources of uncertainty in the future value of bill savings from customer-sited PV, focusing in particular on residential customers. These three sources of uncertainty are: changes to electricity market conditions that would affect retail electricity prices, changes to the types of retail rate structures available to residential customers with PV, and shifts away from standard net-metering toward other compensation mechanisms for residential PV. We investigate the impact of a range of electricity market scenarios on retail electricity prices and rate structures, and the resulting effects on the value of bill savings from PV. The scenarios include various levels of renewable and solar energy deployment, high and low natural gas prices, the possible introduction of carbon pricing, and greater or lesser reliance on utility-scale storage and demand response. We examine the bill savings from PV with time-invariant, flat residential retail rates, as well as with time-varying retail rates, including time-of-use (TOU) rates and real-time pricing (RTP). In addition, we explore a flat rate with increasing-block pricing (IBP). We evaluate the bill savings from PV with net metering, as currently allowed in many states, as well as scenarios with hourly netting, a partial form of net metering. This scoping study is the first known effort to evaluate these types of interactions in a reasonably comprehensive fashion, though by no means have we considered every possible change to electricity market conditions, retail rate structures, or PV compensation mechanisms. It focuses solely on the private value of bill savings for residential PV and does not seek to quantify the broader social or economic cost or value of solar electricity. Our analysis applies assumptions based loosely on California’s electricity market in a future year (2030); however, it is neither intended to forecast California’s future

  20. Geothermal Energy

    SciTech Connect (OSTI)

    Steele, B.C.; Pichiarella, L.S.; 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.

  1. Request for Information on the Availability of New Geothermal Electricity in the Salton Sea Area to Serve Regional Federal Load

    Broader source: Energy.gov [DOE]

    The purpose of the RFI is to gather industry input on options available to the federal government for a potential aggregated power purchase of 100-250 MW of new construction geothermal electricity generated in the Salton Sea area, within the Riverside and Imperial Counties of California, for delivery over a 10-year or 20-year contract period to serve regional federal load.

  2. Electrical Energy and Demand Savings from a Geothermal Heat Pump ESPC at Fort Polk, LA

    SciTech Connect (OSTI)

    Shonder, John A; Hughes, Patrick

    1997-06-01

    At Fort Polk, Louisiana, the space-conditioning systems of an entire city (4,003 military family housing units) have been converted to geothermal heat pumps (GHPs) under an energy savings performance contract. At the same time, other efficiency measures, such as compact fluorescent lights, low-flow hot water outlets, and attic insulation, were installed. Pre- and post-retrofit data were taken at 15-minute intervals on energy flows through the electrical distribution feeders that serve the family housing areas of the post. Fifteen-minute interval data were also taken on energy use from a sample of the residences. The analysis presented in this paper shows that for a typical meteorological year, the retrofits result in an electrical energy savings of approximately 25.6 million kWh, or 32.4% of the pre-retrofit electrical use in family housing. Peak electrical demand has also been reduced by about 6.8 MW, which is 40% of pre-retrofit peak demand. In addition, the retrofits save about 260,000 therms per year of natural gas. It should be noted that the energy savings presented in this document are the 'apparent' energy savings observed in the monitored data and are not to be mistaken for the 'contracted' energy savings used as the basis for payments. To determine the 'contracted' energy savings, the 'apparent' energy savings may require adjustments for such things as changes in indoor temperature performance criteri, addition of ceiling fans, and other factors.

  3. Light absorption and electrical transport in Si:O alloys for photovoltaics

    SciTech Connect (OSTI)

    Mirabella, S.; Crupi, I.; Miritello, M.; Simone, F.; Di Martino, G.; Di Stefano, M. A.; Di Marco, S.; Priolo, F.

    2010-11-15

    Thin films (100-500 nm) of the Si:O alloy have been systematically characterized in the optical absorption and electrical transport behavior, by varying the Si content from 43 up to 100 at. %. Magnetron sputtering or plasma enhanced chemical vapor deposition have been used for the Si:O alloy deposition, followed by annealing up to 1250 deg. C. Boron implantation (30 keV, 3-30x10{sup 14} B/cm{sup 2}) on selected samples was performed to vary the electrical sheet resistance measured by the four-point collinear probe method. Transmittance and reflectance spectra have been extracted and combined to estimate the absorption spectra and the optical band gap, by means of the Tauc analysis. Raman spectroscopy was also employed to follow the amorphous-crystalline (a-c) transition of the Si domains contained in the Si:O films. The optical absorption and the electrical transport of Si:O films can be continuously and independently modulated by acting on different parameters. The light absorption increases (by one decade) with the Si content in the 43-100 at. % range, determining an optical band gap which can be continuously modulated into the 2.6-1.6 eV range, respectively. The a-c phase transition in Si:O films, causing a significant reduction in the absorption coefficient, occurs at increasing temperatures (from 600 to 1100 deg. C) as the Si content decreases. The electrical resistivity of Si:O films can be varied among five decades, being essentially dominated by the number of Si grains and by the doping. Si:O alloys with Si content in the 60-90 at. % range (named oxygen rich silicon films), are proved to join an appealing optical gap with a viable conductivity, being a good candidate for increasing the conversion efficiency of thin-film photovoltaic cell.

  4. Geothermal/Power Plant | Open Energy Information

    Open Energy Info (EERE)

    in Iceland. Geothermal Power Plants discussion Electricity Generation Converting the energy from a geothermal resource into electricity is achieved by producing steam from the...

  5. High density photovoltaic

    SciTech Connect (OSTI)

    Haigh, R.E.; Jacobson, G.F.; Wojtczuk, S.

    1997-10-14

    Photovoltaic technology can directly generate high voltages in a solid state material through the series interconnect of many photovoltaic diodes. We are investigating the feasibility of developing an electrically isolated, high-voltage power supply using miniature photovoltaic devices that convert optical energy to electrical energy.

  6. Sandian Contributes to Western Electricity Coordinating Council

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

    Photovoltaic Power Plant Model Validation Guideline Contributes to Western Electricity Coordinating Council Photovoltaic Power Plant Model Validation Guideline - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure

  7. Utilizing Electric Vehicles to Assist Integration of Large Penetrations of Distributed Photovoltaic Generation Capacity

    SciTech Connect (OSTI)

    Tuffner, Francis K.; Chassin, Forrest S.; Kintner-Meyer, Michael CW; Gowri, Krishnan

    2012-11-30

    Executive Summary Introduction and Motivation This analysis provides the first insights into the leveraging potential of distributed photovoltaic (PV) technologies on rooftop and electric vehicle (EV) charging. Either of the two technologies by themselves - at some high penetrations – may cause some voltage control challenges or overloading problems, respectively. But when combined, there – at least intuitively – could be synergistic effects, whereby one technology mitigates the negative impacts of the other. High penetration of EV charging may overload existing distribution system components, most prominently the secondary transformer. If PV technology is installed at residential premises or anywhere downstream of the secondary transformer, it will provide another electricity source thus, relieving the loading on the transformers. Another synergetic or mitigating effect could be envisioned when high PV penetration reverts the power flow upward in the distribution system (from the homes upstream into the distribution system). Protection schemes may then no longer work and voltage violation (exceeding the voltage upper limited of the ANSI voltage range) may occur. In this particular situation, EV charging could absorb the electricity from the PV, such that the reversal of power flow can be reduced or alleviated. Given these potential mutual synergistic behaviors of PV and EV technologies, this project attempted to quantify the benefits of combining the two technologies. Furthermore, of interest was how advanced EV control strategies may influence the outcome of the synergy between EV charging and distributed PV installations. Particularly, Californian utility companies with high penetration of the distributed PV technology, who have experienced voltage control problems, are interested how intelligent EV charging could support or affect the voltage control

  8. Electric characteristics of germanium Vertical Multijunction (VMJ) photovoltaic cells under high intensity illumination

    SciTech Connect (OSTI)

    Unishkov, V.A.

    1997-03-01

    This paper presents the results of the performance evaluation of Vertical Multijunction (VMJ) germanium (Ge) photovoltaic (PV) cells. Vertical Multijunction Germanium Photovoltaic cells offer several advantages for Thermophotovoltaic (TPV) applications such as high intensity light conversion, low series resistance, more efficient coupling to lower temperature sources, high output voltage, simplified heat rejection system as well as potentially simple fabrication technology and low cost photovoltaic converter device. {copyright} {ital 1997 American Institute of Physics.}

  9. Decreasing Soft Costs for Solar Photovoltaics by Improving the Interconnection Process: A Case Study of Pacific Gas and Electric

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

    Decreasing Soft Costs for Solar Photovoltaics by Improving the Interconnection Process: A Case Study of Pacific Gas and Electric Kristen Ardani and Robert Margolis National Renewable Energy Laboratory Technical Report NREL/TP-7A40-65066 September 2015 NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency & Renewable Energy Operated by the Alliance for Sustainable Energy, LLC This report is available at no cost from the National Renewable Energy Laboratory

  10. Methods for Analyzing the Benefits and Costs of Distributed Photovoltaic Generation to the U.S. Electric Utility System

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

    Methods for Analyzing the Benefits and Costs of Distributed Photovoltaic Generation to the U.S. Electric Utility System Paul Denholm, Robert Margolis, Bryan Palmintier, Clayton Barrows, Eduardo Ibanez, and Lori Bird National Renewable Energy Laboratory Jarett Zuboy Independent Consultant Technical Report NREL/TP-6A20-62447 September 2014 NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency & Renewable Energy Operated by the Alliance for Sustainable

  11. NREL: Geothermal Technologies - Projects

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

    Projects The NREL geothermal team is involved in various projects to help accelerate the development and deployment of clean, renewable geothermal technologies, including low-temperature resources; enhanced geothermal systems; strategic planning, analysis, and modeling; and project assessment. Low-Temperature Geothermal Resources NREL supports the U.S. Department of Energy's (DOE) Geothermal Technologies Office (GTO) through various collaborations that evaluate the levelized cost of electricity

  12. Electrical and thermal finite element modeling of arc faults in photovoltaic bypass diodes.

    SciTech Connect (OSTI)

    Bower, Ward Isaac; Quintana, Michael A.; Johnson, Jay

    2012-01-01

    Arc faults in photovoltaic (PV) modules have caused multiple rooftop fires. The arc generates a high-temperature plasma that ignites surrounding materials and subsequently spreads the fire to the building structure. While there are many possible locations in PV systems and PV modules where arcs could initiate, bypass diodes have been suspected of triggering arc faults in some modules. In order to understand the electrical and thermal phenomena associated with these events, a finite element model of a busbar and diode was created. Thermoelectrical simulations found Joule and internal diode heating from normal operation would not normally cause bypass diode or solder failures. However, if corrosion increased the contact resistance in the solder connection between the busbar and the diode leads, enough voltage potentially would be established to arc across micron-scale electrode gaps. Lastly, an analytical arc radiation model based on observed data was employed to predicted polymer ignition times. The model predicted polymer materials in the adjacent area of the diode and junction box ignite in less than 0.1 seconds.

  13. Impacts of Commercial Electric Utility Rate Structure Elements on the Economics of Photovoltaic Systems

    SciTech Connect (OSTI)

    Ong, S.; Denholm, P.; Doris, E.

    2010-06-01

    This analysis uses simulated building data, simulated solar photovoltaic (PV) data, and actual electric utility tariff data from 25 cities to understand better the impacts of different commercial rate structures on the value of solar PV systems. By analyzing and comparing 55 unique rate structures across the United States, this study seeks to identify the rate components that have the greatest effect on the value of PV systems. Understanding the beneficial components of utility tariffs can both assist decision makers in choosing appropriate rate structures and influence the development of rates that favor the deployment of PV systems. Results from this analysis show that a PV system's value decreases with increasing demand charges. Findings also indicate that time-of-use rate structures with peaks coincident with PV production and wide ranges between on- and off-peak prices most benefit the types of buildings and PV systems simulated. By analyzing a broad set of rate structures from across the United States, this analysis provides an insight into the range of impacts that current U.S. rate structures have on PV systems.

  14. Photovoltaic device and method

    SciTech Connect (OSTI)

    Cleereman, Robert; Lesniak, Michael J.; Keenihan, James R.; Langmaid, Joe A.; Gaston, Ryan; Eurich, Gerald K.; Boven, Michelle L.

    2015-11-24

    The present invention is premised upon an improved photovoltaic device ("PVD") and method of use, more particularly to an improved photovoltaic device with an integral locator and electrical terminal mechanism for transferring current to or from the improved photovoltaic device and the use as a system.

  15. Photovoltaic device and method

    DOE Patents [OSTI]

    Cleereman, Robert J; Lesniak, Michael J; Keenihan, James R; Langmaid, Joe A; Gaston, Ryan; Eurich, Gerald K; Boven, Michelle L

    2015-01-27

    The present invention is premised upon an improved photovoltaic device ("PVD") and method of use, more particularly to an improved photovoltaic device with an integral locator and electrical terminal mechanism for transferring current to or from the improved photovoltaic device and the use as a system.

  16. Amorphous silicon photovoltaic devices

    DOE Patents [OSTI]

    Carlson, David E.; Lin, Guang H.; Ganguly, Gautam

    2004-08-31

    This invention is a photovoltaic device comprising an intrinsic or i-layer of amorphous silicon and where the photovoltaic device is more efficient at converting light energy to electric energy at high operating temperatures than at low operating temperatures. The photovoltaic devices of this invention are suitable for use in high temperature operating environments.

  17. Geothermal Resources and Transmission Planning

    Broader source: Energy.gov [DOE]

    This project addresses transmission-related barriers to utility-scale deployment of geothermal electric generation technologies.

  18. Photovoltaic Cell Performance Basics | Department of Energy

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

    Performance Basics Photovoltaic Cell Performance Basics August 19, 2013 - 4:55pm Addthis Photovoltaic (PV), or solar cells use the energy in sunlight to produce electricity. ...

  19. Effects of vaporizer and evaporative condenser pinch points on geofluid effectiveness and cost of electricity for geothermal binary power plants

    SciTech Connect (OSTI)

    Demuth, O.J.

    1984-01-01

    A brief study was conducted in support of the DOE/DGHT Heat Cycle Research Program to investigate the influences of minimum approach temperature differences occurring in supercritical-heater/vaporizer and evaporative-condenser heat rejection systems on geothermal-electric binary power plant performance and cost of electricity. For the systems investigated optimum pinch points for minimizing cost of electricity were estimated to range from 5 to 7/sup 0/F (3 to 4/sup 0/C) for the heater vaporizer. The minimum approach of condensing temperature to wet-bulb temperature for evaporative condensers was estimated to be about 15/sup 0/F (8/sup 0/C) in order to achieve the highest plant net geofluid effectiveness, and approximately 30/sup 0/F (17/sup 0/C) to attain the minimum cost of electricity.

  20. Honey Lake Geothermal Area | Department of Energy

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

    The Honey Lake geothermal area is located in Lassen County, California and Washoe County, Nevada. There are three geothermal projects actively producing electrical power. They are ...

  1. Iwate Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Profile Gross Production Capacity: Net Production Capacity: Owners : Tohoku Hydropower Geothermal Energy.CoTohoku Electric Power Tohoku HydropowerGeothermal Energy Co Power...

  2. Overview of geothermal technologies

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    The geothermal overview section of the Renewable Energy Technology Characterizations describes the technical and economic status of this emerging renewable energy option for electricity supply.

  3. Water-related constraints to the development of geothermal electric generating stations

    SciTech Connect (OSTI)

    Robertson, R.C.; Shepherd, A.D.; Rosemarin, C.S.; Mayfield, M.W.

    1981-06-01

    The water-related constraints, which may be among the most complex and variable of the issues facing commercialization of geothermal energy, are discussed under three headings: (1) water requirements of geothermal power stations, (2) resource characteristics of the most promising hydrothermal areas and regional and local water supply situations, and (3) legal issues confronting potential users of water at geothermal power plants in the states in which the resource areas are located. A total of 25 geothermal resource areas in California, New Mexico, Oregon, Idaho, Utah, Hawaii, and Alaska were studied. Each had a hydrothermal resource temperature in excess of 150/sup 0/C (300/sup 0/F) and an estimated 30-year potential of greater than 100-MW(e) capacity.

  4. Geothermal energy: a brief assessment

    SciTech Connect (OSTI)

    Lunis, B.C.; Blackett, R.; Foley, D.

    1982-07-01

    This document includes discussions about geothermal energy, its applications, and how it is found and developed. It identifies known geothermal resources located in Western's power marketing area, and covers the use of geothermal energy for both electric power generation and direct applications. Economic, institutional, environmental, and other factors are discussed, and the benefits of the geothermal energy resource are described.

  5. NREL Geothermal Policymakers' Guidebooks Web site (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-10-01

    This document highlights the NREL Geothermal Policymakers' Guidebooks Web site, including the five steps to effective geothermal policy development for geothermal electricity generation and geothermal heating and cooling technologies.

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

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

    SMU Geothermal Conference 2011 - Geothermal Technologies Program SMU Geothermal Conference 2011 - Geothermal Technologies Program DOE Geothermal Technologies Program presentation ...

  7. Understanding Variability and Uncertainty of Photovoltaics for Integration with the Electric Power System

    SciTech Connect (OSTI)

    Mills, Andrew; Ahlstrom, Mark; Brower, Michael; Ellis, Abraham; George, Ray; Hoff, Tom; Kroposki, Benjamin; Lenox, Carl; Miller, Nicholas; Stein, Joshua; Wan, Yih-huei

    2009-12-07

    Data and analysis are needed to understand the variability of photovoltaic (PV) plants to avoid unnecessary barriers to the interconnection of PV. Several datasets show clouds can cause rapid changes in solar insolation. Smoothing of rapid ramps, however, occurs within PV plants. The degree of smoothing depends on plant size. Smoothing occurs on even longer time-scales between separate plants.

  8. Characterization of plasmonic hole arrays as transparent electrical contacts for organic photovoltaics using high-brightness Fourier transform methods

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Camino, Fernando E.; Nam, Chang-Yong; Pang, Yutong T.; Hoy, Jessica; Eisaman, Matthew D.; Black, Charles T.; Sfeir, Matthew Y.

    2014-05-15

    Here we present a methodology for probing light-matter interactions in prototype photovoltaic devices consisting of an organic semiconductor active layer with a semitransparent metal electrical contact exhibiting surface plasmon-based enhanced optical transmission. We achieve high-spectral irradiance in a spot size of less than 100 μm using a high-brightness laser-driven light source and appropriate coupling optics. Spatially resolved Fourier transform photocurrent spectroscopy in the visible and near-infrared spectral regions allows us to measure external quantum efficiency with high sensitivity in small-area devices (<1 mm2). Lastly, this allows for rapid fabrication of variable-pitch sub-wavelength hole arrays in metal films for use asmore » transparent electrical contacts, and evaluation of the evanescent and propagating mode coupling to resonances in the active layer.« less

  9. Optimization of Electric Power Systems for Off-Grid Domestic Applications: An Argument for Wind/Photovoltaic Hybrids

    SciTech Connect (OSTI)

    Jennings, W.; Green, J.

    2001-01-01

    The purpose of this research was to determine the optimal configuration of home power systems relevant to different regions in the United States. The hypothesis was that, regardless of region, the optimal system would be a hybrid incorporating wind technology, versus a photovoltaic hybrid system without the use of wind technology. The method used in this research was HOMER, the Hybrid Optimization Model for Electric Renewables. HOMER is a computer program that optimizes electrical configurations under user-defined circumstances. According to HOMER, the optimal system for the four regions studied (Kansas, Massachusetts, Oregon, and Arizona) was a hybrid incorporating wind technology. The cost differences between these regions, however, were dependent upon regional renewable resources. Future studies will be necessary, as it is difficult to estimate meteorological impacts for other regions.

  10. Optimizing Geothermal with Geo-Solar Hybrid Systems | Department...

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

    geothermal plant and solar photovoltaic field, for a total installed capacity of 60 MW. Source: Enel Green Power North America DOE is exploring the potential of using hybrid ...

  11. Electricity Generation from Geothermal Resources on the Fort Peck Reservation in Northeast Montana

    SciTech Connect (OSTI)

    Carlson, Garry J.; Birkby, Jeff

    2015-05-12

    Tribal lands owned by Assiniboine and Sioux Tribes on the Fort Peck Indian Reservation, located in Northeastern Montana, overlie large volumes of deep, hot, saline water. Our study area included all the Fort Peck Reservation occupying roughly 1,456 sq miles. The geothermal water present in the Fort Peck Reservation is located in the western part of the Williston Basin in the Madison Group complex ranging in depths of 5500 to 7500 feet. Although no surface hot springs exist on the Reservation, water temperatures within oil wells that intercept these geothermal resources in the Madison Formation range from 150 to 278 degrees F.

  12. Electrical Power Generation Using Geothermal Fluid Co-produced from Oil & Gas

    Broader source: Energy.gov [DOE]

    Project objectives: To validate and realize the potential for the production of low temperature resource geothermal production on oil & gas sites. Test and document the reliability of this new technology.; Gain a better understanding of operational costs associated with this equipment.

  13. Three-dimensional electrical resistivity tomography and its application to Larderello-Valle Secolo geothermal field in Tuscany, Italy

    SciTech Connect (OSTI)

    Shi, Weiqun; Rodi, W.; Toksoez, M.N.; Morgan, F.D.

    1997-10-01

    The Valle Secolo region in the Larderello geothermal field in western Italy is a vapor-dominated reservoir producing steam primarily from shallow, highly fractured Miscan anhydrites. In this area, water re-injection into various wells has been carried out for many years. During this period, electrical resistivity surveys have been conducted for the purpose of monitoring distribution of re-injected water and steam displacement through changes in subsurface electrical properties. This paper describes a 3-D d.c. electrical resistivity inversion algorithm and its application to data obtained from two surveys conducted in 1991 and 1993, respectively. The objective of this effort is to relate the variations in resistivity with position and time to the injection history. Our inversion models indicate that the primary resistivity variations in the Larderello geothermal field are of structural origin, e.g., the variation of conductivity of the geologic section. However, the models from both surveys contain a low resistivity anomaly at a depth of a few hundred meters that does not correlate with structure. From its location relative to the injection wells, and from changes in its properties between the two surveys, we infer that the anomaly is related to the injection and is probably a zone of high permeability or high water saturation. These preliminary results show that it is possible to detect and monitor the re-injection of fluid through the systematic observation of electrical resistivity at the site. The method is also suitable for the detection of environmental contaminant movement. However, field measurements must be repeated using the same geometry and uniform calibration over time.

  14. Evaluation and Ranking of Geothermal Resources for Electrical Generation or Electrical Offset in Idaho, Montana, Oregon and Washington. Volume I.

    SciTech Connect (OSTI)

    Bloomquist, R. Gordon

    1985-06-01

    The objective was to consolidate and evaluate all geologic, environmental, and legal and institutional information in existing records and files, and to apply a uniform methodology to the evaluation and ranking of sites to allow the making of creditable forecasts of the supply of geothermal energy which could be available in the region over a 20 year planning horizon. A total of 1265 potential geothermal resource sites were identified from existing literature. Site selection was based upon the presence of thermal and mineral springs or wells and/or areas of recent volcanic activity and high heat flow. 250 sites were selected for detailed analysis. A methodology to rank the sites by energy potential, degree of developability, and cost of energy was developed. Resource developability was ranked by a method based on a weighted variable evaluation of resource favorability. Sites were ranked using an integration of values determined through the cost and developability analysis. 75 figs., 63 tabs.

  15. Assessment of Geothermal Resources for Electric Generation in the Pacific Northwest, Draft Issue Paper for the Northwest Power Planning Council

    SciTech Connect (OSTI)

    Geyer, John D.; Kellerman, L.M.; Bloomquist, R.G.

    1989-09-26

    This document reviews the geothermal history, technology, costs, and Pacific Northwest potentials. The report discusses geothermal generation, geothermal resources in the Pacific Northwest, cost and operating characteristics of geothermal power plants, environmental effects of geothermal generation, and prospects for development in the Pacific Northwest. This report was prepared expressly for use by the Northwest Power Planning Council. The report contains numerous references at the end of the document. [DJE-2005

  16. Photovoltaic solar cell

    DOE Patents [OSTI]

    Nielson, Gregory N; Cruz-Campa, Jose Luis; Okandan, Murat; Resnick, Paul J

    2014-05-20

    A photovoltaic solar cell for generating electricity from sunlight is disclosed. The photovoltaic solar cell comprises a plurality of spaced-apart point contact junctions formed in a semiconductor body to receive the sunlight and generate the electricity therefrom, the plurality of spaced-apart point contact junctions having a first plurality of regions having a first doping type and a second plurality of regions having a second doping type. In addition, the photovoltaic solar cell comprises a first electrical contact electrically connected to each of the first plurality of regions and a second electrical contact electrically connected to each of the second plurality of regions, as well as a passivation layer covering major surfaces and sidewalls of the photovoltaic solar cell.

  17. List of Photovoltaics Incentives | Open Energy Information

    Open Energy Info (EERE)

    Standard West Virginia Investor-Owned Utility Retail Supplier Anaerobic Digestion Biodiesel Biomass CHPCogeneration Fuel Cells Geothermal Electric Hydroelectric energy...

  18. Geothermal energy abstract sets. Special report No. 14

    SciTech Connect (OSTI)

    Stone, C.

    1985-01-01

    This bibliography contains annotated citations in the following areas: (1) case histories; (2) drilling; (3) reservoir engineering; (4) injection; (5) geothermal well logging; (6) environmental considerations in geothermal development; (7) geothermal well production; (8) geothermal materials; (9) electric power production; (10) direct utilization of geothermal energy; (11) economics of geothermal energy; and (12) legal, regulatory and institutional aspects. (ACR)

  19. Photovoltaic power generation system free of bypass diodes

    SciTech Connect (OSTI)

    Lentine, Anthony L.; Okandan, Murat; Nielson, Gregory N.

    2015-07-28

    A photovoltaic power generation system that includes a solar panel that is free of bypass diodes is described herein. The solar panel includes a plurality of photovoltaic sub-modules, wherein at least two of photovoltaic sub-modules in the plurality of photovoltaic sub-modules are electrically connected in parallel. A photovoltaic sub-module includes a plurality of groups of electrically connected photovoltaic cells, wherein at least two of the groups are electrically connected in series. A photovoltaic group includes a plurality of strings of photovoltaic cells, wherein a string of photovoltaic cells comprises a plurality of photovoltaic cells electrically connected in series. The strings of photovoltaic cells are electrically connected in parallel, and the photovoltaic cells are microsystem-enabled photovoltaic cells.

  20. Electrical energy and demand savings from a geothermal heat pump energy savings performance contract at Ft. Polk, LA

    SciTech Connect (OSTI)

    Shonder, J.A.; Hughes, P.J.

    1997-06-01

    At Fort Polk, LA the space conditioning systems of an entire city (4,003 military family housing units) have been converted to geothermal heat pumps (GHP) under an energy savings performance contract. At the same time, other efficiency measures such as compact fluorescent lights (CFLs), low-flow hot water outlets, and attic insulation were installed. Pre- and post-retrofit data were taken at 15-minute intervals on energy flows through the electrical distribution feeders that serve the family housing areas of the post. 15-minute interval data was also taken on energy use from a sample of the residences. This paper summarizes the electrical energy and demand savings observed in this data. Analysis of feeder-level data shows that for a typical year, the project will result in a 25.6 million kWh savings in electrical energy use, or 32.4% of the pre-retrofit electrical consumption in family housing. Results from analysis of building-level data compare well with this figure. Analysis of feeder-level data also shows that the project has resulted in a reduction of peak electrical demand of 6,541 kW, which is 39.6% of the pre-retrofit peak electrical demand. In addition to these electrical savings, the facility is also saving an estimated 260,000 therms per year of natural gas. It should be noted that the energy savings presented in this document are the apparent energy savings observed in the monitored data, and are not to be confused with the contracted energy savings used as the basis for payments. To determine the contracted energy savings, the apparent energy savings may require adjustments for such things as changes in indoor temperature performance criteria, additions of ceiling fans, and other factors.

  1. Photovoltaic solar cell

    DOE Patents [OSTI]

    Nielson, Gregory N; Okandan, Murat; Cruz-Campa, Jose Luis; Resnick, Paul J

    2013-11-26

    A photovoltaic solar cell for generating electricity from sunlight is disclosed. The photovoltaic solar cell comprises a plurality of spaced-apart point contact junctions formed in a semiconductor body to receive the sunlight and generate the electicity therefrom, the plurality of spaced-apart point contact junctions having a first plurality of regions having a first doping type and a second plurality of regions having a second doping type. In addition, the photovoltaic solar cell comprises a first electrical contact electrically connected to each of the first plurality of regions and a second electrical contact electrically connected to each of the second plurality of regions, as well as a passivation layer covering major surfaces and sidewalls of the photovoltaic solar cell.

  2. Energy 101: Geothermal Energy | Department of Energy

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

    Geothermal Energy Energy 101: Geothermal Energy Addthis Description 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. Topic Geothermal Text Version Below is the text version for the Energy 101: Geothermal Energy video. The words "Energy 101: Geothermal Energy"

  3. Geothermal Resource Basics | Department of Energy

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

    Renewable Energy » Geothermal » Geothermal Resource Basics Geothermal Resource Basics August 14, 2013 - 1:58pm Addthis Although geothermal heat pumps can be used almost anywhere, most direct-use and electrical production facilities in the United States are located in the west, where the geothermal resource base is concentrated. Current drilling technology limits the development of geothermal resources to relatively shallow water- or steam-filled reservoirs, most of which are found in the

  4. Stanford Geothermal Workshop - Geothermal Technologies Office...

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

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

  5. Evaluation and Ranking of Geothermal Resources for Electrical Generation or Electrical Offset in Idaho, Montana, Oregon and Washington. Volume II.

    SciTech Connect (OSTI)

    Bloomquist, R. Gordon

    1985-06-01

    This volume contains appendices on: (1) resource assessment - electrical generation computer results; (2) resource assessment summary - direct use computer results; (3) electrical generation (high temperature) resource assessment computer program listing; (4) direct utilization (low temperature) resource assessment computer program listing; (5) electrical generation computer program CENTPLANT and related documentation; (6) electrical generation computer program WELLHEAD and related documentation; (7) direct utilization computer program HEATPLAN and related documentation; (8) electrical generation ranking computer program GEORANK and related documentation; (9) direct utilization ranking computer program GEORANK and related documentation; and (10) life cycle cost analysis computer program and related documentation. (ACR)

  6. Utility-scale photovoltaic concentrators

    SciTech Connect (OSTI)

    None, None

    2009-01-18

    The photovoltaics concentrators section of the Renewable Energy Technology Characterizations describes the technical and economic status of this emerging renewable energy option for electricity supply.

  7. Grid-Interactive Electric Vehicle DC-Link Photovoltaic Charging System -

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

    Grid-Connected Renewable Energy Systems Grid-Connected Renewable Energy Systems When connecting a home energy system to the electric grid, research and consider equipment required as well as your power provider’s requirements and agreements. | Photo courtesy of Solar Design Associates, Inc. When connecting a home energy system to the electric grid, research and consider equipment required as well as your power provider's requirements and agreements. | Photo courtesy of Solar Design

  8. Residential Photovoltaic Solar Panels

    Office of Energy Efficiency and Renewable Energy (EERE)

    This b-roll footage shows exteriors of two Colorado residences that use photovoltaic panels to collect renewable solar energy, thereby reducing their dependence on external electric power. Net...

  9. Microsystems Enabled Photovoltaics (MEPV)

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

    Enabled Photovoltaics (MEPV) - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Energy Defense Waste Management Programs Advanced

  10. Geothermal Energy Association Honors Two NRELians with Top Recognition...

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

    association that supports the expanded use of geothermal energy and the development of geothermal resources worldwide for electrical power generation and direct-heat uses. More...

  11. Electricity Transmission and Distribution Technologies - Energy Innovation

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

    Portal Technology Marketing Summaries Site Map Printable Version Share this resource About Search Categories (15) Advanced Materials Biomass and Biofuels Building Energy Efficiency Electricity Transmission Marketing Summaries (74) Success Stories (2) Energy Analysis Energy Storage Geothermal Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial Technologies Solar Photovoltaic Solar Thermal Startup America Vehicles and Fuels Wind Energy Partners (27) Visual Patent Search Success

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

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

    Iceland Geothermal Conference 2013 - Geothermal Policies and Impacts in the U.S. Iceland Geothermal Conference 2013 - Geothermal Policies and Impacts in the U.S. Iceland Geothermal ...

  13. Enhanced Geothermal Systems Subprogram Overview

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

    Baker Hughes Oilfield Operations Inc. Texas Engineering Experiment Station Impact ... NakNek Electric Association ARRA NakNek, Alaska Raft River, ID Source: US Geothermal ...

  14. Thin film photovoltaic cell

    DOE Patents [OSTI]

    Meakin, John D.; Bragagnolo, Julio

    1982-01-01

    A thin film photovoltaic cell having a transparent electrical contact and an opaque electrical contact with a pair of semiconductors therebetween includes utilizing one of the electrical contacts as a substrate and wherein the inner surface thereof is modified by microroughening while being macro-planar.

  15. 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 DOEs 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.

  16. 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 DOEs 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.

  17. 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.

  18. 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.

  19. Navy 1 Geothermal Area | Department of Energy

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

    Navy 1 Geothermal Area Navy 1 Geothermal Area The Navy 1 Geothermal Project is located on the test and evaluation ranges of the Naval Air Weapons Station, China Lake. At its peak, the project produced more than 273 megawatts of electricity that was sold into the local utility grid under a long-term power sales agreement. Photo of the Coso Geothermal Area

  20. Utah Geothermal Area | Department of Energy

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

    Utah Geothermal Area Utah Geothermal Area Utah has two geothermal electric plants: the 23-megawatt Roosevelt Hot Springs facility near Milford run by Utah Power and CalEnergy Corp., and the Utah Municipal Power Association's Cove Fort Station, which is located north of Beaver, Utah. Photo of the Bud L. Bonnett Geothermal Plant in Cove Fort Sulphurdale, UT

  1. Enhanced Geothermal Systems | Department of Energy

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

    Enhanced Geothermal Systems Enhanced Geothermal Systems Below are the project presentations and respective peer review results for Engineered Geothermal Systems, Low Temperature and Exploration Demonstration Projects. Newberry Volcano EGS Demonstration, Susan Petty, AltaRock Energy, Inc. Southwest Alaska Regional Geothermal Energy Project, Gary Friedmann, Naknek Electric Association New York Canyon Simulation, Bernard Raemy, Terra-Gen Power, LLC

  2. Integrated optical and electrical modeling of plasmon-enhanced thin film photovoltaics: A case-study on organic devices

    SciTech Connect (OSTI)

    Rourke, Devin; Ahn, Sungmo; Nardes, Alexandre M.; Lagemaat, Jao van de; Kopidakis, Nikos; Park, Wounjhang

    2014-09-21

    The nanoscale light control for absorption enhancement of organic photovoltaic (OPV) devices inevitably produces strongly non-uniform optical fields. These non-uniformities due to the localized optical modes are a primary route toward absorption enhancement in OPV devices. Therefore, a rigorous modeling tool taking into account the spatial distribution of optical field and carrier generation is necessary. Presented here is a comprehensive numerical model to describe the coupled optical and electrical behavior of plasmon-enhanced polymer:fullerene bulk heterojunction (BHJ) solar cells. In this model, a position-dependent electron-hole pair generation rate that could become highly non-uniform due to photonic nanostructures is directly calculated from the optical simulations. By considering the absorption and plasmonic properties of nanophotonic gratings included in two different popular device architectures, and applying the Poisson, current continuity, and drift/diffusion equations, the model predicts quantum efficiency, short-circuit current density, and desired carrier mobility ratios for bulk heterojunction devices incorporating nanostructures for light management. In particular, the model predicts a significant degradation of device performance when the carrier species with lower mobility are generated far from the collecting electrode. Consequently, an inverted device architecture is preferred for materials with low hole mobility. This is especially true for devices that include plasmonic nanostructures. Additionally, due to the incorporation of a plasmonic nanostructure, we use simulations to theoretically predict absorption band broadening of a BHJ into energies below the band gap, resulting in a 4.8% increase in generated photocurrent.

  3. Akita Geothermal Field | Open Energy Information

    Open Energy Info (EERE)

    Owners : Mitsubishi Materials Co Mitsubishi Materials CoTohoku Electric Power Akita Geothermal Energy CoTohoku Electric Power Power Purchasers : Other Uses: Click "Edit With...

  4. Systems Engineering; 2010 Geothermal Technology Program Peer Review Report

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

    | Department of Energy Engineering; 2010 Geothermal Technology Program Peer Review Report Systems Engineering; 2010 Geothermal Technology Program Peer Review Report DOE 2010 Geothermal Technologies Program Peer Review adse_004_lowry.pdf (192.71 KB) More Documents & Publications Geothermal Electricity Technology Evaluation Model (GETEM) Development; 2010 Geothermal Technology Program Peer Review Report Life-cycle Analysis of Geothermal Technologies; 2010 Geothermal Technology Program Peer

  5. Geothermal Energy: Current abstracts

    SciTech Connect (OSTI)

    Ringe, A.C.

    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)

  6. Geothermal Energy Technology

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

    ... about 1.6M barrels of oil annually in the United ... * 22 states offer GHP tax incentives Geothermal Energy ... electric; 0.3 quadrillion Btu total) * Baseline power - ...

  7. Distributed Solar Photovoltaics for Electric Vehicle Charging: Regulatory and Policy Considerations (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2014-09-01

    Increasing demand for electric vehicle (EV) charging provides an opportunity for market expansion of distributed solar technology. A major barrier to the current deployment of solar technology for EV charging is a lack of clear information for policy makers, utilities and potential adopters. This paper introduces the pros and cons of EV charging during the day versus at night, summarizes the benefits and grid implications of combining solar and EV charging technologies, and offers some regulatory and policy options available to policy makers and regulators wanting to incentivize solar EV charging.

  8. Chena Hot Springs Resort - Electric Power Generation Using Geothermal Fluid Coproduced from Oil and/or Gas Wells

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

    Below are the project presentations and respective peer review results for Chemistry, Reservoir and Integrated Models. Development and Validation of an Advanced Stimulation Prediction Model for Enhanced Geothermal Systems (EGS), Marte Gutierrez and Masami Nakagawa, Colorado School of Mines Development of Advanced Thermal-Hydrological-Mechanical-Chemical (THMC) Modeling Capabilities for Enhanced Geothermal Systems, Yu-Shu Wu, Colorado School of Mines Enhanced Geothermal Systems (EGS) with CO2 as

  9. Hydro and geothermal electricity as an alternative for industrial petroleum consumption in Costa Rica

    SciTech Connect (OSTI)

    Mendis, M.; Park, W.; Sabadell, A.; Talib, A.

    1982-04-01

    This report assesses the potential for substitution of electricity for petroleum in the industrial/agro-industrial sector of Costa Rica. The study includes a preliminary estimate of the process energy needs in this sector, a survey of the principal petroleum consuming industries in Costa Rica, an assessment of the electrical technologies appropriate for substitution, and an analysis of the cost trade offs of alternative fuels and technologies. The report summarizes the total substitution potential both by technical feasibility and by cost effectiveness under varying fuel price scenarios and identifies major institutional constraints to the introduction of electric based technologies. Recommendations to the Government of Costa Rica are presented. The key to the success of a Costa Rican program for substitution of electricity for petroleum in industry rests in energy pricing policy. The report shows that if Costa Rica Bunker C prices are increased to compare equitably with Caribbean Bunker C prices, and increase at 3 percent per annum relative to a special industrial electricity rate structure, the entire substitution program, including both industrial and national electric investment, would be cost effective. The definition of these pricing structures and their potential impacts need to be assessed in depth.

  10. Photovoltaic Cell Basics | Department of Energy

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

    Cell Basics Photovoltaic Cell Basics August 16, 2013 - 4:53pm Addthis Photovoltaic (PV) cells, or solar cells, take advantage of the photoelectric effect to produce electricity. PV ...

  11. Human Resources in Geothermal Development

    SciTech Connect (OSTI)

    Fridleifsson, I.B.

    1995-01-01

    Some 80 countries are potentially interested in geothermal energy development, and about 50 have quantifiable geothermal utilization at present. Electricity is produced from geothermal in 21 countries (total 38 TWh/a) and direct application is recorded in 35 countries (34 TWh/a). Geothermal electricity production is equally common in industrialized and developing countries, but plays a more important role in the developing countries. Apart from China, direct use is mainly in the industrialized countries and Central and East Europe. There is a surplus of trained geothermal manpower in many industrialized countries. Most of the developing countries as well as Central and East Europe countries still lack trained manpower. The Philippines (PNOC) have demonstrated how a nation can build up a strong geothermal workforce in an exemplary way. Data from Iceland shows how the geothermal manpower needs of a country gradually change from the exploration and field development to monitoring and operations.

  12. Enhanced Geothermal Systems Webinar | Department of Energy

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

    Enhanced Geothermal Systems Webinar Enhanced Geothermal Systems Webinar The following presentations are from a Webinar conducted on July 15, 2009, that was hosted by the Geothermal Resources Council (GRC) and sponsored by the American Public Power Association, National Rural Electric Cooperative Associate, Western Area Power Administration, and U.S. Department of Energy Geothermal Technologies Office. The Webinar covered topics including federal enhanced geothermal systems (EGS) activities and

  13. Geothermal Heat Pumps | Department of Energy

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

    Pumps Geothermal Heat Pumps Two commercial 36-ton geothermal heat pumps being used at the College of Southern Idaho. The Geothermal Technologies Office focuses only on electricity generation. For additional information about geothermal heating and cooling and ground source heat pumps, please visit the U.S. Department of Energy (DOE)'s Buildings Technologies Office. The geothermal heat pump, also known as the ground source heat pump, is a highly efficient renewable energy technology that is

  14. Integrated optical and electrical modeling of plasmon-enhanced thin film photovoltaics: A case-study on organic devices

    SciTech Connect (OSTI)

    Rourke, D; Ahn, S; Nardes, AM; van de Lagemaat, J; Kopidakis, N; Park, W

    2014-09-21

    The nanoscale light control for absorption enhancement of organic photovoltaic (OPV) devices inevitably produces strongly non-uniform optical fields. These non-uniformities due to the localized optical modes are a primary route toward absorption enhancement in OPV devices. Therefore, a rigorous modeling tool taking into account the spatial distribution of optical field and carrier generation is necessary. Presented here is a comprehensive numerical model to describe the coupled optical and electrical behavior of plasmon-enhanced polymer: fullerene bulk heterojunction (BHJ) solar cells. In this model, a position-dependent electron-hole pair generation rate that could become highly non-uniform due to photonic nanostructures is directly calculated from the optical simulations. By considering the absorption and plasmonic properties of nanophotonic gratings included in two different popular device architectures, and applying the Poisson, current continuity, and drift/diffusion equations, the model predicts quantum efficiency, short-circuit current density, and desired carrier mobility ratios for bulk heterojunction devices incorporating nanostructures for light management. In particular, the model predicts a significant degradation of device performance when the carrier species with lower mobility are generated far from the collecting electrode. Consequently, an inverted device architecture is preferred for materials with low hole mobility. This is especially true for devices that include plasmonic nanostructures. Additionally, due to the incorporation of a plasmonic nanostructure, we use simulations to theoretically predict absorption band broadening of a BHJ into energies below the band gap, resulting in a 4.8% increase in generated photocurrent. (C) 2014 AIP Publishing LLC.

  15. Polymer Hybrid Photovoltaics for Inexpensive Electricity Generation: Final Technical Report, 1 September 2001--30 April 2006

    SciTech Connect (OSTI)

    Carter, S. A.

    2006-07-01

    The project goal is to understand the operating mechanisms underlying the performance of polymer hybrid photovoltaics to enable the development of a photovoltaic with a maximum power conversion efficiency over cost ratio that is significantly greater than current PV technologies. Plastic or polymer-based photovoltaics can have significant cost advantages over conventional technologies in that they are compatible with liquid-based plastic processing and can be assembled onto plastic under atmospheric conditions (ambient temperature and pressure) using standard printing technologies, such as reel-to-reel and screen printing. Moreover, polymer-based PVs are lightweight, flexible, and largely unbreakable, which make shipping, installation, and maintenance simpler. Furthermore, a numerical simulation program was developed (in collaboration with IBM) to fully simulate the performance of multicomponent polymer photovoltaic devices, and a manufacturing method was developed (in collaboration with Add-vision) to inexpensively manufacture larger-area devices.

  16. Geothermal Energy Projects | Department of Energy

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

    Geothermal Energy Projects Geothermal Energy Projects Geothermal Energy Projects Geothermal Energy Projects Geothermal Energy Projects Geothermal Energy Projects Geothermal Energy ...

  17. Photovoltaics | Department of Energy

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

    Photovoltaics Photovoltaics The SunShot Initiative supports the research and development of photovoltaic (PV) technologies to improve efficiency and reliability and to lower manufacturing costs in order to make solar electricity cost-competitive with other sources of energy by 2020. As of November 2015, four years into the decade-long SunShot Initiative, the solar industry is about 70% of the way to achieving SunShot's cost target of $0.06 per kilowatt-hour for utility-scale PV (based on 2010

  18. Asphaltene based photovoltaic devices

    DOE Patents [OSTI]

    Chianelli, Russell R.; Castillo, Karina; Gupta, Vipin; Qudah, Ali M.; Torres, Brenda; Abujnah, Rajib E.

    2016-03-22

    Photovoltaic devices and methods of making the same, are disclosed herein. The cell comprises a photovoltaic device that comprises a first electrically conductive layer comprising a photo-sensitized electrode; at least one photoelectrochemical layer comprising metal-oxide particles, an electrolyte solution comprising at least one asphaltene fraction, wherein the metal-oxide particles are optionally dispersed in a surfactant; and a second electrically conductive layer comprising a counter-electrode, wherein the second electrically conductive layer comprises one or more conductive elements comprising carbon, graphite, soot, carbon allotropes or any combinations thereof.

  19. Photovoltaics Fact Sheet

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

    Verde National Park in Colorado is the home of this PV array, where it provides energy for the visitor center. Photo Courtesy: Department of Energy Photovoltaics The U.S. Department of Energy (DOE)'s Solar Energy Technologies Office works with industry, academia, national laboratories, and other government agencies to advance solar photovoltaics (PV), which is the direct conversion of sunlight into electricity by a semiconductor, in support of the goals of the SunShot Initiative. SunShot

  20. Geothermal Steam Power Plant | Open Energy Information

    Open Energy Info (EERE)

    1.95e-4 TW Single Flash 1997 Gunun-Salak Geothermal Area Sunda Volcanic Arc Hachijojima Geothermal Energy Power Plant Tokyo Electric Power 3.3 MW3,300 kW 3,300,000 W...

  1. Multiple gap photovoltaic device

    DOE Patents [OSTI]

    Dalal, Vikram L.

    1981-01-01

    A multiple gap photovoltaic device having a transparent electrical contact adjacent a first cell which in turn is adjacent a second cell on an opaque electrical contact, includes utilizing an amorphous semiconductor as the first cell and a crystalline semiconductor as the second cell.

  2. Geothermal Literature Review At International Geothermal Area...

    Open Energy Info (EERE)

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

  3. Geothermal Literature Review At International Geothermal Area...

    Open Energy Info (EERE)

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

  4. Geothermal Literature Review At International Geothermal Area...

    Open Energy Info (EERE)

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

  5. Thin film photovoltaic panel and method

    SciTech Connect (OSTI)

    Ackerman, B.; Albright, S.P.; Jordan, J.F.

    1991-06-11

    This patent describes an improved stability photovoltaic panel. It comprises photovoltaic cells each having polycrystalline thin film layers, each of the thin film layers respectively deposited on a common vitreous substrate for allowing light to pass therethrough to reach a photovoltaic heterojunction formed by at least two of the thin film layers, at least one of the film layers forming the photovoltaic heterojunction for each of the photovoltaic cells, each of the photovoltaic cells lying within a plane substantially parallel to an interior planar surface of the vitreous substrate, each of the photovoltaic cells being connected electrically in series to pass electrical current from the photovoltaic panel, a pliable sheet material backcap opposite the vitreous substrate with respect to the photovoltaic cells and spaced from the photovoltaic cells so as to form a substantially planar spacing between the photovoltaic cells and an interior surface of the sheet material backcap, a perimeter portion of the sheet material backcap having a bend for positioning an edge strip of the sheet material backcap spaced from the interior surface of the backcap to form the planar spacing, the edge strip forming a planar surface parallel with a sealingly engaging the vitreous substrate for forming a fluid-tight seal with the vitreous substrate about the perimeter of the photovoltaic cells for protecting the photovoltaic cells from elements exterior of the photovoltaic panel, and a selected desiccant filling substantially the planar spacing for preventing water vapor within the planar spacing from adversely affecting the photovoltaic cells.

  6. Farmers Electric Cooperative - Residential/Agricultural Energy...

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

    Residential Agricultural Savings Category Solar Photovoltaics Wind (All) Geothermal Heat Pumps Water Heaters Lighting Heat Pumps CaulkingWeather-stripping Building Insulation...

  7. Sandian Contributes to Western Electricity Coordinating Council...

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

    Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, ... HomeAnalysis, Energy, Grid Integration, News, News & Events, Photovoltaic, ...

  8. 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...

  9. 2008 Geothermal Technologies Market Report

    Office of Energy Efficiency and Renewable Energy (EERE)

    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.

  10. 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.

  11. 2008 Geothermal Technologies Market Report | Department of Energy

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

    08 Geothermal Technologies Market Report 2008 Geothermal Technologies Market Report 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

  12. Optimizing Carbon Nanotube Contacts for Use in Organic Photovoltaics: Preprint

    SciTech Connect (OSTI)

    Barnes, T. M.; Blackburn, J. L.; Tenent, R. C.; Morfa, A.; Heben, M.; Coutts, T. J.

    2008-05-01

    This report describes research on optimizing carbon nanotube networks for use as transparent electrical contacts (TCs) in organic photovoltaics (OPV).

  13. Photovoltaic device

    DOE Patents [OSTI]

    Reese, Jason A.; Keenihan, James R.; Gaston, Ryan S.; Kauffmann, Keith L.; Langmaid, Joseph A.; Lopez, Leonardo C.; Maak, Kevin D.; Mills, Michael E.; Ramesh, Narayan; Teli, Samar R.

    2015-06-02

    The present invention is premised upon an improved photovoltaic device ("PV device"), more particularly to an improved photovoltaic device with a multilayered photovoltaic cell assembly and a body portion joined at an interface region and including an intermediate layer, at least one interconnecting structural member, relieving feature, unique component geometry, or any combination thereof.

  14. Photovoltaic device

    SciTech Connect (OSTI)

    Reese, Jason A.; Keenihan, James R.; Gaston, Ryan S.; Kauffmann, Keith L.; Langmaid, Joseph A.; Lopez, Leonardo C.; Maak, Kevin D.; Mills, Michael E.; Ramesh, Narayan; Teli, Samar R.

    2015-09-01

    The present invention is premised upon an improved photovoltaic device ("PV device"), more particularly to an improved photovoltaic device (10) with a multilayered photovoltaic cell assembly (100) and a body portion (200) joined at an interface region (410) and including an intermediate layer (500), at least one interconnecting structural member (1500), relieving feature (2500), unique component geometry, or any combination thereof.

  15. Graphite-based photovoltaic cells

    DOE Patents [OSTI]

    Lagally, Max; Liu, Feng

    2010-12-28

    The present invention uses lithographically patterned graphite stacks as the basic building elements of an efficient and economical photovoltaic cell. The basic design of the graphite-based photovoltaic cells includes a plurality of spatially separated graphite stacks, each comprising a plurality of vertically stacked, semiconducting graphene sheets (carbon nanoribbons) bridging electrically conductive contacts.

  16. Photovoltaics | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaics (Redirected from Solar Photovoltaics) Jump to: navigation, search (The following text is derived from NREL's description of photovoltaic technology.)1 Photovoltaic...

  17. Photovoltaics | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaics (Redirected from Photovoltaic) Jump to: navigation, search (The following text is derived from NREL's description of photovoltaic technology.)1 Photovoltaic Panels...

  18. DOE Office of Indian Energy Foundational Course on Geothermal

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

    Present foundational information on strategic energy planning, grid basics, and ... Yes Electrical Generation Geo Exchange Systems (Geothermal Heat Pumps) Residential ...

  19. Photovoltaic Crystalline Silicon Cell Basics | Department of...

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

    Crystalline Silicon Cell Basics Photovoltaic Crystalline Silicon Cell Basics August 20, 2013 - 2:00pm Addthis To separate electrical charges, crystalline silicon cells must have a ...

  20. Inverted, semitransparent small molecule photovoltaic cells ...

    Office of Scientific and Technical Information (OSTI)

    small molecule photovoltaic cells Authors: Xiao, Xin 1 ; Lee, Kyusang 1 ; Forrest, Stephen R. 2 + Show Author Affiliations Department of Electrical Engineering and Computer...

  1. NREL: Photovoltaics Research - News Release Archives

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

    including renewable electricity generation, renewable energy development, clean energy ... that currently cannot host on-site photovoltaic (PV) systems shared solar ...

  2. NREL: Geothermal Technologies Home Page

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

    Geothermal Technologies Photo of a red-hot pool of molten lava within a broad lava bed and with snow-capped peaks in the distance. Geothermal energy taps the heat from beneath the earth's surface to generate electricity. Existing reservoirs of steam or hot water are brought to the surface to power electrical generators throughout the Western United States. In the future, the intense heat deep below the surface will be accessed for electricity generation by the advanced engineering of reservoirs

  3. Low-Temperature Geothermal Photo Library | Department of Energy

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

    Low-Temperature Geothermal Photo Library Low-Temperature Geothermal Photo Library Addthis America&#039;s First Geothermally Heated Campus adds 3.5 MW of Clean, Domestic Electricity Generation 1 of 2 America's First Geothermally Heated Campus adds 3.5 MW of Clean, Domestic Electricity Generation With Energy Department support, the Klamath Falls campus will utilize 1.5 megawatts (MW) of newly installed geothermal capacity combined with a 2 MW solar array, making OIT the first university in

  4. A Roadmap for Strategic Development of Geothermal Exploration Technologies

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

    | Department of Energy A Roadmap for Strategic Development of Geothermal Exploration Technologies A Roadmap for Strategic Development of Geothermal Exploration Technologies The Dixie Valley Geothermal Plant in Nevada produces 60 MW of electricity. The Dixie Valley Geothermal Plant in Nevada produces 60 MW of electricity. A technology roadmap paper on geothermal exploration technologies. exploration_technical_roadmap2013.pdf (345.07 KB) More Documents & Publications A Roadmap for

  5. Small Solar Electric Systems | Department of Energy

    Energy Savers [EERE]

    Electricity & Fuel Buying & Making Electricity Small Solar Electric Systems Small Solar Electric Systems A small solar electric or photovoltaic system can be a reliable and ...

  6. Rapid screening buffer layers in photovoltaics

    SciTech Connect (OSTI)

    List, III, Frederick Alyious; Tuncer, Enis

    2014-09-09

    An apparatus and method of testing electrical impedance of a multiplicity of regions of a photovoltaic surface includes providing a multi-tipped impedance sensor with a multiplicity of spaced apart impedance probes separated by an insulating material, wherein each impedance probe includes a first end adapted for contact with a photovoltaic surface and a second end in operable communication with an impedance measuring device. The multi-tipped impedance sensor is used to contact the photovoltaic surface and electrical impedance of the photovoltaic material is measured between individual first ends of the probes to characterize the quality of the photovoltaic surface.

  7. 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 75C water from shallow wells. Power production is assisted by the availability of gravity fed, 7C 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

  8. Envisioning a Renewable Electricity Future for the United States

    Broader source: Energy.gov [DOE]

    This paper presents high renewable electricity penetration scenarios in the United States using detailed capacity expansion modeling that is designed to properly account for the variability and uncertainty of wind and solar resources. The scenarios focus solely on the electricity system, an important sector within the larger energy sector, and demonstrate long-term visions of a U.S. power system where renewable technologies, including biomass, geothermal, hydropower, solar, and wind, contribute 80% of 2050 annual electricity, including 49–55% from wind and solar photovoltaic generation. We also present the integration challenges of achieving this high penetration and characterize the options to increase grid flexibility to manage variability.

  9. Geothermal progress monitor. Progress report No. 7

    SciTech Connect (OSTI)

    Not Available

    1983-04-01

    A state-by-state review of major geothermal-development activities during 1982 is presented. It also inlcudes a summary of recent drilling and exploration efforts and the results of the 1982 leasing program. Two complementary sections feature an update of geothermal direct-use applications and a site-by-site summary of US geothermal electric-power development.

  10. Geothermal Energy Featured on NBC's Today Show

    Broader source: Energy.gov [DOE]

    In Iceland, there are five major geothermal power plants which produce about 26% (2006) of the country's electricity. In addition, geothermal heating meets the heating and hot water requirements for around 87% of the nation's buildings. As part of its "Ends of the Earth" series, NBC's Today Show presented a feature on the use of geothermal energy in Iceland.