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Sample records for activities solar decathlon

  1. Solar Decathlon 2009 (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2009-04-01

    This brochure provides key information about Solar Decathlon 2009--the dates, the background of the competition and event, and where to go for more information.

  2. Solar Decathlon Newsletter, April/May 2002

    SciTech Connect (OSTI)

    Not Available

    2002-04-01

    Four-page, two-color newsletter produced bi-monthly and distributed electronically for Solar Decathlon teams. This newsletter highlights activities associated with the Solar Decathlon, informs student teams about competition logistics and contest updates, and keeps sponsors, the media, and the public up to date on the event.

  3. Solar Decathlon

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo.Hydrogen4Energy Smooth BromeBuildings |Solar PoolU.S. Department

  4. Solar Decathlon Turns Ten | Department of Energy

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

    Solar Decathlon Turns Ten Solar Decathlon Turns Ten September 28, 2012 - 2:22pm Addthis For the past 10 years, the Solar Decathlon has educated consumers about affordable clean...

  5. Solar Decathlon 2015 | Department of Energy

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

    Solar Decathlon 2015 Solar Decathlon 2015 Addthis 1 of 68 An electric car sits parked at Clemson University during public exhibit hours of U.S. Department of Energy Solar Decathlon...

  6. Webtrends Archives by Fiscal Year - Solar Decathlon | Department...

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

    Year - Solar Decathlon Webtrends Archives by Fiscal Year - Solar Decathlon From the EERE Web Statistics Archive: Corporate sites, Webtrends archives for the Solar Decathlon site by...

  7. 2005 Solar Decathlon (Competition Program)

    SciTech Connect (OSTI)

    Not Available

    2005-10-01

    The 2005 Solar Decathlon Competition Program is distributed to Solar Decathlon visitors, media, sponsors, and the student competitors. It contains basic facts about the Solar Decathlon: what, where, when, who, and how. It is a guide for visitors to the events and workshops. It describes the 10 contests and the technologies used in the houses. It celebrates the accomplishments of the competitors and provides an opportunity for the major sponsors to describe their roles and relay their commitment to the ideals of the Solar Decathlon.

  8. Solar Decathlon 2013

    SciTech Connect (OSTI)

    Lewis, Chandra; Ouyang, Derek; Brown, Victoria; Ainsworth, Claire; Lee, Daniel; King, Richard; ,

    2013-10-22

    The Solar Decathlon is a perfect example of how the Energy Department is training and inspiring the next generation of architects, engineers and entrepreneurs. The two-year competition challenges collegiate teams to build energy-efficient, solar-powered houses. Over the course of the competition, students gain hands-on experience in everything from fundraising and marketing to design and construction. Showcasing their houses to the general public allows students to get feedback on their designs and how they work in the real world -- something that many of them would never get in the classroom.

  9. Solar Decathlon 2013

    ScienceCinema (OSTI)

    Lewis, Chandra; Ouyang, Derek; Brown, Victoria; Ainsworth, Claire; Lee, Daniel; King, Richard;

    2014-01-10

    The Solar Decathlon is a perfect example of how the Energy Department is training and inspiring the next generation of architects, engineers and entrepreneurs. The two-year competition challenges collegiate teams to build energy-efficient, solar-powered houses. Over the course of the competition, students gain hands-on experience in everything from fundraising and marketing to design and construction. Showcasing their houses to the general public allows students to get feedback on their designs and how they work in the real world -- something that many of them would never get in the classroom.

  10. Solar Decathlon Opening | Department of Energy

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

    Solar Decathlon Opening Solar Decathlon Opening October 6, 2005 - 12:25pm Addthis Remarks Prepared for Energy Secretary Bodman Let me begin by welcoming all of you to this Solar...

  11. Solar Decathlon Turns Ten | Department of Energy

    Energy Savers [EERE]

    jobs in the clean energy economy. | Photo courtesy of Stefano Paltera, U.S. Department of Energy Solar Decathlon. For the past 10 years, the Solar Decathlon has educated consumers...

  12. Energy Department Announces Student Teams for Solar Decathlon...

    Office of Environmental Management (EM)

    Energy Department Announces Student Teams for Solar Decathlon 2015 Energy Department Announces Student Teams for Solar Decathlon 2015 February 19, 2014 - 12:00am Addthis The Energy...

  13. Energy Department Announces Student Teams for Solar Decathlon...

    Office of Environmental Management (EM)

    Announces Student Teams for Solar Decathlon 2015 Energy Department Announces Student Teams for Solar Decathlon 2015 February 19, 2014 - 12:00am Addthis The Energy Department on...

  14. Solar Decathlon 2015: Nation's Leading Sustainable Home Design...

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

    Solar Decathlon 2015: Nation's Leading Sustainable Home Design Competition on the Horizon Solar Decathlon 2015: Nation's Leading Sustainable Home Design Competition on the Horizon...

  15. Solar Decathlon Technology Spotlight: Structural Insulated Panels...

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

    spotlights that introduces common technologies used in U.S. Department of Energy Solar Decathlon team houses. Structural insulated panels (SIPs) are prefabricated...

  16. University of Colorado Wins 2005 Solar Decathlon | Department...

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

    University of Colorado Wins 2005 Solar Decathlon University of Colorado Wins 2005 Solar Decathlon October 14, 2005 - 11:56am Addthis Solar Village to Remain Open to Public through...

  17. Solar Decathlon | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque|Sensitive Species3performedValley | SystemSolar Decathlon

  18. Solar Decathlon 2005: The Event in Review

    SciTech Connect (OSTI)

    Moon, S.; Nahan, R.; Warner, C.; Wassmer, M.

    2006-06-01

    Solar Decathlon 2005: The Event in Review is a technical report describing the 2005 Solar Decathlon, an event sponsored by the U.S. Department of Energy wherein 18 collegiate teams competed in 10 contests to design, build, and operate an attractive, efficient, entirely solar-powered home. The report gives an overview of the competition, including final results, team strategies, and detailed descriptions the 18 homes.

  19. Solar Decathlon 2013: Going the Distance

    Office of Energy Efficiency and Renewable Energy (EERE)

    As part of our behind-the-scenes look at what it takes to compete in the Solar Decathlon, we are examining how teams transport their houses to the competition site.

  20. Solar Decathlon Update from Secretary Chu

    ScienceCinema (OSTI)

    Chu, Steven

    2013-05-29

    Secretary Steven Chu provides his insights on the 2009 Solar Decathlon in Washington, DC. To view each of the houses in this year's competition and vote for your favorite, visit http://www.solardecathlon.org/virtual_tours/

  1. Department of Energy Considers New Venue for Solar Decathlon...

    Office of Environmental Management (EM)

    Department of Energy Considers New Venue for Solar Decathlon 2013 Department of Energy Considers New Venue for Solar Decathlon 2013 August 1, 2011 - 3:29pm Addthis Washington, D.C....

  2. 2007 Solar Decathlon Closing Ceremony and Awards | Department...

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

    2007 Solar Decathlon Closing Ceremony and Awards 2007 Solar Decathlon Closing Ceremony and Awards October 19, 2007 - 3:21pm Addthis Remarks as Prepared for Secretary Bodman Thank...

  3. Solar Decathlon Team Leading the Way Toward Sustainable Living...

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

    Solar Decathlon Team Leading the Way Toward Sustainable Living, Even in the Wake of Disasters Solar Decathlon Team Leading the Way Toward Sustainable Living, Even in the Wake of...

  4. Solar Decathlon 2015: Energy.gov Fan Favorite Poll Results |...

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

    Solar Decathlon 2015: Energy.gov Fan Favorite Poll Results Solar Decathlon 2015: Energy.gov Fan Favorite Poll Results October 22, 2015 - 10:10am Addthis West Virginia University...

  5. SOLAR DECATHLON EUROPE 2014 IN FRANCE REQUEST FOR PROPOSAL 2014

    E-Print Network [OSTI]

    Papanicolaou, Vassilis

    SOLAR DECATHLON EUROPE 2014 IN FRANCE REQUEST FOR PROPOSAL 2014 #12;TABLE OF CONTENTS 1 and design) are invited to participate in the third edition of the Solar Decathlon Europe in 2014 in France ! The SDE (Solar Decathlon Europe) organization, the French Ministry of territorial Equality and Housing

  6. Solar Decathlon Presentation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing Tool FitsProjectDataSecretaryDepartment of EnergyDepartment»New Teams!Opening Solar

  7. Solar Decathlon house continues to yield data | ornl.gov

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

    Solar Decathlon house continues to yield data ORNL, University of Tennessee to continue lessons learned in DOE solar energy competition Courtesy of: UT College of Architecture and...

  8. 2007 Solar Decathlon: Powered by the Sun (Competition Program)

    SciTech Connect (OSTI)

    Not Available

    2007-09-01

    The 2007 Solar Decathlon Competition Program is distributed to Solar Decathlon visitors, media, sponsors, and the student competitors. It contains basic facts about the Solar Decathlon: what, where, when, who, and how. It is a guide for visitors to the events and workshops. It describes the 10 contests and the technologies used in the houses. It celebrates the accomplishments of the competitors and provides an opportunity for the major sponsors to describe their roles and relay their commitment to the ideals of the Solar Decathlon.

  9. Solar Decathlon 2015: Nation's Leading Sustainable Home Design...

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

    Nation's Leading Sustainable Home Design Competition on the Horizon Solar Decathlon 2015: Nation's Leading Sustainable Home Design Competition on the Horizon July 13, 2015 - 2:15pm...

  10. Solar Decathlon at Home in the D.C. Community

    Broader source: Energy.gov [DOE]

    Celebrating the completion of the Empowerhouse Solar Decathlon team's demonstration house into a permanent, two-family home in the District's Ward 7.

  11. ABOUT THE SOLAR DECATHLON The U.S. Department of Energy Solar Decathlon is an award-winning program

    E-Print Network [OSTI]

    Sze, Lawrence

    ABOUT THE SOLAR DECATHLON The U.S. Department of Energy Solar Decathlon is an award-winning program that challenges collegiate teams to design, build and operate solar-powered houses that are cost-effective, energy-efficient and attractive. The competition shows consumers how to save money and energy with affordable clean energy

  12. A Solar Decathlon Entry for Historic Norfolk

    Broader source: Energy.gov [DOE]

    It’s a tale of two universities with a vision for one historic city. Students from both Hampton and Old Dominion universities have joined forces to compete in the upcoming Energy Department Solar Decathlon with their entry, called Unit 6 Unplugged. At Tidewater Virginia, the students will unveil their vision for the future -- an energy-efficient house that captures the “Arts and Crafts” design style of homes dotted throughout historic Norfolk, Virginia.

  13. Solar Decathlon 2015 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque|Sensitive Species3performedValley | SystemSolar Decathlon 2015

  14. Smart Meters Help Balance Energy Consumption at Solar Decathlon

    Broader source: Energy.gov [DOE]

    Clouds, rain, thunderstorms… at Solar Decathlon Village? Oh my, you may say. But less-than-ideal weather conditions are no match for this year's teams, thanks to smart grid technology that is helping them monitor their energy consumption.

  15. Impact Evaluation of the U.S. Department of Energy’s Solar Decathlon Program

    SciTech Connect (OSTI)

    none,

    2012-12-01

    This report includes the methodology and findings in evaluating DOE’s Solar Decathlon event. The primary purpose of this evaluation is to learn how effectively the Solar Decathlon event is meeting its objectives.

  16. Solar Decathlon Team Using Appalachian Mountain History to Model Home of the Future

    Broader source: Energy.gov [DOE]

    See how Appalachian State University used traditional mountain life architecture to design their 2011 Solar Decathlon home.

  17. Grid Modernization Highlighted in Washington DC in September with the Solar Decathlon

    Broader source: Energy.gov [DOE]

    Smart Grid is on display at the U.S. Department of Energy 2011 Solar Decathlon, held September 23 through October 2 on the National Mall, West Potomac Park, Washington, DC.  The decathlon...

  18. NREL: Technology Deployment - Solar Decathlon

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines lightGeospatial ToolkitSMARTS -Being Replicated AcrossSolar Soft Costs

  19. Solar Decathlon Entry Uses iPad to Monitor Home

    Broader source: Energy.gov [DOE]

    The University of Tennessee, Knoxville is participating in its first Solar Decathlon 2011 competition, featuring its home, “Living Light.” Named for its very brightly sunlit double facade glass system, the home’s blueprint was inspired by the cantilever barns of Southern Appalachia, which feature giant eves to provide shade and a two-core design.??

  20. U.S. Department of Energy Solar Decathlon

    SciTech Connect (OSTI)

    2011-12-16

    The U.S. Department of Energy Solar Decathlon is an award-winning program that challenges 20 collegiate teams to design, build, and operate solar-powered houses that are cost-effective, energy-efficient, and attractive. In addition to showcasing the cost savings and environmental benefits of market-ready solar technologies, the event encourages participating students to think in new ways about incorporating practical, affordable clean-energy solutions into residential applications.

  1. Solar Decathlon Participants Bring Innovation to D.C.'s Ward 7

    Broader source: Energy.gov [DOE]

    Read about the "Empowerhouse Collaborative" -- a 2011 Solar Decathlon Team partnering with Habitat for Humanity building their home for a family in Washington, D.C.

  2. University of Maryland Solar Decathlon Team Celebrates with a "Shed Raising"

    Broader source: Energy.gov [DOE]

    The University of Maryland 2011 Solar Decathlon Team is using one element -- water -- as a major component of their home. Here's how.

  3. U.S. DEPARTMENT OF ENERGY SOLAR DECATHLON 2011 NEW ZEALAND VICTORIA UNIVERSITY OF WELLINGTON

    E-Print Network [OSTI]

    Frean, Marcus

    U.S. DEPARTMENT OF ENERGY SOLAR DECATHLON 2011 NEW ZEALAND ­ VICTORIA UNIVERSITY OF WELLINGTON #12 of Energy Solar Decathlon. Led by students from the School of Architecture, our team comprises students from into the mountains. #12;4 5 SOLAR CONTROL DESIGN FEATURES The First Light house is a net zero energy dwelling

  4. Team Massachusetts Brings a Fourth Dimension to the Solar Decathlon

    Broader source: Energy.gov [DOE]

    Team Massachusetts is bringing a unique perspective to the Solar Decathlon this fall. You might say it is a fourth dimension because of the team’s newly constructed 4D Home. But it could also be argued that it is because the Massachusetts College of Art and Design and University of Massachusetts Lowell are collaborating for the team’s first entry into the biannual competition, and they’re both public institutions.

  5. Solar Decathlon 2015: Meet the Teams | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015: Build it and They

  6. Solar Decathlon 2015: Nation's Leading Sustainable Home Design

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015: Build it and

  7. Solar Decathlon 2015: The Next Generation of Clean Energy Leaders |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015: Build it andDepartment of

  8. Impact Evaluation of the U.S. Department of Energy's Solar Decathlon...

    Energy Savers [EERE]

    of Energy (DOE) Solar Decathlon Program challenges teams of college students to design, build, and operate solar-powered houses that are cost-effective, energy-efficient, and...

  9. U.S. Department of Energy Solar Decathlon Visitors Guide 2015

    SciTech Connect (OSTI)

    2015-09-03

    The U.S. Department of Energy 2015 Visitors Guide is a free, hard-copy publication distributed free to those attending the Solar Decathlon event. The publications' objectives are to serve as the primary information resource for those in attendance, and to deliver a compelling message about the Solar Decathlon's success as a proven workforce development program and its role in educating students and the public about clean energy products and design solutions. The U.S. Department of Energy 2015 Visitors Guide SD15 Visitors Guide goals are to guide attendees through the Solar Decathlon village; List and explain the 10 contests; educate attendees about the participating teams and their competition houses; provide access to more information on the Solar Decathlon website through the use of QR codes; and acknowledge the support of all event sponsors.

  10. Team Canada Returns to the Solar Decathlon with First Nation Values in Mind

    Broader source: Energy.gov [DOE]

    Team Canada’s 2011 Solar Decathlon house -- which is known as TRTL (Technological Residence that respects Traditional Living) -- addresses critical housing issues in Alberta, Canada’s Aboriginal communities.

  11. Solar Decathlon Design Places People and the Outdoors at its Heart

    Broader source: Energy.gov [DOE]

    The Solar Decathlon team from New Zealand is the first from the Southern Hemisphere to compete in the competition. Learn how they are using the "Kiwi bach" as inspiration for their design.

  12. Solar Decathlon Opening | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing Tool FitsProjectDataSecretaryDepartment of EnergyDepartment»New Teams!Opening Solar

  13. Belgium’s Ghent University Prepares their E-Cube for Solar Decathlon 2011

    Broader source: Energy.gov [DOE]

    The Ghent University 2011 Solar Decathlon Team -- aka Team Belgium -- is a unique two-story home that could very well be an international star at the competition due to the Belgium team’s innovative, ultra-efficient, passive home design.

  14. Design, Construction, Transportation, Operation and Post-Occupancy Analysis for the Texas A&M Solar Decathlon House 

    E-Print Network [OSTI]

    Malhotra, M.; Ramirez, E.; Im, P.; Cho, S.; Canez, J.; Haberl, J.; Schaider, N.; Fisk, P.; Feigenbaum, L.

    2008-01-01

    This paper describes the design, construction, transportation, operation and post occupancy analysis of the 2007 Texas A&M Solar Decathlon House (TAMU SD house). The TAMU SD house was developed to be a modular house that ...

  15. Online National Solar Energy Directory and 2005 Solar Decathlon Product Directory. Final report

    SciTech Connect (OSTI)

    Hamm, Julia; Taylor, Mike

    2008-12-31

    The Solar Electric Power Association (SEPA), in partnership with the American Solar Energy Society, developed an online National Solar Energy Directory with clear, comprehensive information on suppliers and purchasing options. The site was originally located at FindSolar.com, but has recently been moved to Find-Solar.org. The original FindSolar.com domain name has been taken by the American Solar Energy Society (a partner in this project) and utilized for a similar but different project. This Find-Solar.org directory offers the rapidly growing base of potential solar customers a simple, straightforward destination to learn about their solar options. Members of the public are able to easily locate contractors in their geographic area and verify companiesâ?? qualifications with accurate third-party information. It allows consumers to obtain key information on the economics, incentives, desirability, and workings of a solar energy system, as well as competing quotes from different contractors and reviews from customers they have worked with previously. Find-Solar.org is a means of facilitating the growing public interest in solar power and overcoming a major barrier to widespread development of U.S. solar markets. In addition to the development of Find-Solar.org, SEPA developed a separate online product directory for the 2005 DOE Solar Decathlon to facilitate the communication of information about the energy efficiency and renewable energy products used in each university teamâ??s home.

  16. Design and Performance of Solar Decathlon 2011 High-Penetration Microgrid: Preprint

    SciTech Connect (OSTI)

    Stafford, B.; Coddington, M.; Butt, R.; Solomon, S.; Wiegand, G.; Wagner, C.; Gonzalez, B.

    2012-04-01

    The U.S. Department of Energy Solar Decathlon challenges collegiate teams to design, build, and operate solar-powered houses that are cost-effective, energy-efficient, and attractive. The Solar Decathlon 2011 was held in Washington, D.C., from September 23 to October 2, 2011 . A high-penetration microgrid was designed, installed, and operated for the Solar Decathlon 2011 to grid-connect 19 highly energy-efficient, solar-powered competition houses to a single utility connection point. The capacity penetration of this microgrid (defined as maximum PV generation divided by maximum system load over a two-week period) was 74% based on 1-minute averaged data. Temporary, ground-laid conductors and electrical distribution equipment were installed to grid-connect the Solar Decathlon village, which included the houses as well as other electrical loads used by the event organizers. While 16 of the houses were connected to the 60 Hz microgrid, three houses from Belgium, China, and New Zealand were supplied with 50 Hz power. The design of the microgrid, including the connection of the houses powered by 50 Hz and a standby diesel generator, is discussed in this paper. In addition to the utility-supplied net energy meters at each house, a microgrid monitoring system was installed to measure and record energy consumption and PV energy production at 1-second intervals at each house. Bidirectional electronic voltage regulators were installed for groups of competition houses, which held the service voltage at each house to acceptable levels. The design and successful performance of this high-penetration microgrid is presented from the house, microgrid operator, and utility perspectives.

  17. Solar Decathlon 2015: Build it and They Will Come | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015: Build it and They Will

  18. Here Comes the Sun: Solar Decathlon Opens To Public Today

    Broader source: Energy.gov [DOE]

    At the National Mall’s West Potomac Park in Washington, D.C., a new type of neighborhood has taken shape. The solar village is on full display with highly-efficient, solar-powered homes on every block.

  19. Illuminating Solar Decathlon Homes: Exploring Next Generation Lighting Technology - Light Emitting Diodes

    SciTech Connect (OSTI)

    Gordon, Kelly L.; Gilbride, Theresa L.

    2008-05-22

    This report was prepared by PNNL for the US Department of Energy Building Technologies Program, Solid-State Lighting Program. The report will be provided to teams of university students who are building houses for the 2009 Solar Decathlon, a home design competition sponsored in part by DOE, to encourage teams to build totally solar powered homes. One aspect of the competition is lighting. This report provides the teams with information about LED lighting that can help them determine how they incorporate LED lighting into their homes. The report provides an overview of LED technology, a status of where LED technology is today, questions and answers about lighting quality, efficiency, lifetime etc.; numerous examples of LED products; and several weblinks for further research.

  20. Design of a Net-Metering and PV Exhibit for the 2005 Solar Decathlon

    SciTech Connect (OSTI)

    Wassmer, M.; Warner, C.

    2005-01-01

    In the 2005 Solar Decathlon competition, 19 collegiate teams will design, build, and operate grid-independent homes powered by photovoltaic (PV) arrays on the National Mall. The prominence of grid-interconnected systems in the marketplace has provided the impetus for the development of a net-metering exhibit to be installed and operated during the competition. The exhibit will inform the visiting public about PV basics and appropriate alternatives to grid-independent systems. It will consist of four interactive components. One will be designed to educate people about the principles of net metering using a small PV array, a grid-interactive inverter, and a variable load. Additional components of the exhibit will demonstrate the effects of orientation, cloud cover, and nighttime on performance. The nighttime component will discuss appropriate storage options for different applications.

  1. Solar Decathlon 2013: Meet the Teams | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLE DIRECTIVES PursuantEnergy Small|Energy SolarSolar

  2. Solar Decathlon 2013: Building Skills for Future Careers | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo.Hydrogen4Energy Smooth BromeBuildings |Solar

  3. Solar Decathlon Design Models 2009 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo.Hydrogen4Energy Smooth BromeBuildings |SolarDesigning

  4. Energy, Interior Departments Announce New Location for Solar Decathlon 2011

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPLfor Innovative SolarSavingsAugust 26, 2013 Energy2006One<Clean|

  5. German Technische Universitat Darmstadt Wins DOE's 2007 Solar Decathlon |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPLforLDRD Report11, SolarMat 4" |a,- p^AEnergyDepartment

  6. Solar Decathlon 2013 Infographic: The Path to a Brighter Future |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo.Hydrogen4Energy Smooth BromeBuildings |Solar PoolU.S.Department

  7. Solar Decathlon 2013: Going the Distance | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo.Hydrogen4Energy Smooth BromeBuildings |SolarDesigning the

  8. University of Colorado Wins 2005 Solar Decathlon | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyThe U.S.Laclede GasEfficiency|Feed|DepartmentThe United States andFrom left toSolar

  9. 2009 Solar Decathlon Winners Announced | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12 Beta-3 Racetracks Y-12 Beta-3of/Energy|20082009 ECR99 Solar

  10. U.S. Department of Energy Solar Decathlon: Challenging Students to Build Energy Efficient, Cost-Effective, and Attractive Solar-Powered Houses

    SciTech Connect (OSTI)

    Simon, J.

    2012-01-01

    The U.S. Department of Energy Solar Decathlon challenges collegiate teams to design, build, and operate solar-powered houses that are cost-effective, energy-efficient, and attractive. The winner of the competition is the team that best blends affordability, consumer appeal, and design excellence with optimal energy production and maximum efficiency. The paper discusses the solutions developed for the event. We believe that the solutions implemented for Solar Decathlon 2011 represent current trends and that by analyzing, critiquing, and exposing the solutions pursued, the industry can become better suited to address challenges of the future. Constructing a solar community using high-efficiency design and unique materials while remaining code compliant, safe, and effective results in solutions that are market relevant, important, and interesting to the industry as a whole.

  11. Solar Decathlon Visitors Guide 2011, National Mall, West Potomac Park, Washington, D.C., September 23 - October 2, 2011 (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2011-09-01

    Guide to the student-designed houses, ten contests, exhibits, and workshops of the U.S. Department of Energy 2011 Solar Decathlon, held in Washington, D.C., from September 23 through October 2, 2011. Teams of college students designed and built the solar-powered houses on display here. They represent 13 U.S. states, five countries, and four continents. Now the teams are rising to the challenge by competing in 10 contests over nine days, with the championship trophy on the line. This is their time to shine. The 2011 teams may share a common goal - to design and build the best energy-efficient house powered by the sun - but their strategies are different. One house is made of precast concrete, while another 'dances' in response to its environment. Another house is meant to sit atop a building, proving the sky's the limit for energy innovation. Whatever your idea of sustainable living may be, you are bound to find it at the Solar Decathlon.

  12. Design, Operation, and Controlled-Island Operation of the U.S. Department of Energy Solar Decathlon 2013 Microgrid

    SciTech Connect (OSTI)

    Kurnik, C.; Butt, R. S.; Metzger, I.; Lavrova, O.; Patibandla, S.; Wagner, V.; Frankosky, M.; Wiegand, G.

    2015-04-22

    This document reports on the design and operation of a high-capacity and high-penetration-ratio microgrid, which consists of 19 photovoltaic-powered residential houses designed by collegiate teams as part of their participation in the U.S. Department of Energy Solar Decathlon 2013. The microgrid was interconnected with the local utility, and resulting net-power and power-quality events were recorded in high detail (1-minute data sampling or better). Also, a controlled-island operation test was conducted to evaluate the microgrid response to additional events such as increased loads (e.g., from electric vehicles) and bypassing of voltage regulators. This temporary ground-laid microgrid was stable under nominal and island-operation conditions; adverse weather and loads did not lead to power-quality degradation.

  13. Energy Department Announces Student Teams, Location for Solar...

    Office of Environmental Management (EM)

    Student Teams, Location for Solar Decathlon 2015 Energy Department Announces Student Teams, Location for Solar Decathlon 2015 February 13, 2014 - 1:00pm Addthis News Media Contact...

  14. Energy Department Selects Student Teams to Compete in 2009 Solar Decathlon

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPLfor Innovative Solar Power PlantEnergyLawrence Berkeley,| Department of

  15. Solar Decathlon 2013: Raising More Than Just Walls | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo.Hydrogen4Energy Smooth BromeBuildings |SolarDesigning theMeet:

  16. Solar Decathlon Teams Working Around the Clock to Assemble Homes For

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy BillsNo.Hydrogen4Energy Smooth BromeBuildings |SolarDesigningWake

  17. Solar Decathlon 2011 Opens To Media This Week | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLE DIRECTIVES PursuantEnergy Small|Energy Solar

  18. Solar Decathlon | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher iSlide 1 More Documents &1000 Independence<ADepartment ofWake of1 of 69

  19. Solar Decathlon | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing Tool FitsProjectDataSecretaryDepartment of EnergyDepartment»New Teams!Openingat

  20. The Texas Solar D House 

    E-Print Network [OSTI]

    Garrison, M.

    2004-01-01

    The Solar Decathlon provided a national forum for competition among fourteen university student teams, each of which designed, built, and operated a totally solar-powered home with a home office and their transportation ...

  1. Petrovay: Solar physics The solar cycle ACTIVE REGIONS

    E-Print Network [OSTI]

    Petrovay, Kristóf

    Petrovay: Solar physics The solar cycle ACTIVE REGIONS Large scale (up to 100 Mm) anomalies in the structure and radiation of the solar atmosphere. Photosphere : AR = cluster of strong magnetic flux tubes of facular points. Filamentary structure due to supergranulation. #12;Petrovay: Solar physics The solar cycle

  2. Deciphering Solar Magnetic Activity: On Grand Minima in Solar Activity

    E-Print Network [OSTI]

    McIntosh, Scott W

    2015-01-01

    The Sun provides the energy necessary to sustain our existence. While the Sun provides for us, it is also capable of taking away. The weather and climatic scales of solar evolution and the Sun-Earth connection are not well understood. There has been tremendous progress in the century since the discovery of solar magnetism - magnetism that ultimately drives the electromagnetic, particulate and eruptive forcing of our planetary system. There is contemporary evidence of a decrease in solar magnetism, perhaps even indicators of a significant downward trend, over recent decades. Are we entering a minimum in solar activity that is deeper and longer than a typical solar minimum, a "grand minimum"? How could we tell if we are? What is a grand minimum and how does the Sun recover? These are very pertinent questions for modern civilization. In this paper we present a hypothetical demonstration of entry and exit from grand minimum conditions based on a recent analysis of solar features over the past 20 years and their p...

  3. Modeling Solar Activity Bayesian Analysis of Stellar Evolution

    E-Print Network [OSTI]

    Wolfe, Patrick J.

    Modeling Solar Activity Bayesian Analysis of Stellar Evolution Astrostatistical Analysis in Solar, David Astrostatistical Analysis in Solar and Stellar Physics #12;Modeling Solar Activity Bayesian Analysis of Stellar Evolution Outline 1 Modeling Solar Activity Background Morphological Feature Extraction

  4. Solar Energy Education. Industrial arts: student activities....

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

    arts: student activities. Field test edition Citation Details In-Document Search Title: Solar Energy Education. Industrial arts: student activities. Field test edition You are...

  5. Secretary Chu Congratulates Solar Decathlon Winners | Department...

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

    faces a choice today: Will we sit on the sidelines and fall behind or will we play to win the clean energy race? Some say this is a race America can't win. They're ready to wave...

  6. Solar Decathlon Technology Spotlight: Structural Insulated Panels |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMayBuilding K-25 cleanup atDepartmentCompetition on

  7. Solar Decathlon Turns Ten | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMayBuilding K-25 cleanup atDepartmentCompetition onFor

  8. Total Solar Irradiance Variability and the Solar Activity Cycle

    E-Print Network [OSTI]

    Probhas Raychaudhuri

    2006-05-06

    It is suggested that the solar variability is due to the perturbed nature of the solar core and this variability is provided by the variability of the solar neutrino flux from the solar neutrino detectors i.e., Homestake, Superkamiokande, SAGE and GALLEX-GNO. The solar neutrino flux in the standard solar model (SSM) was calculated on the assumption of L_nu (neutrino luminosity) = L_gamma (optical luminosity) which implies that if there is a change in optical luminosity then solar neutrino flux data will also be changed. An internal dynamo due to the cyclic variation of nuclear energy generation inside the core of the sun is responsible for the solar activity cycle was suggested and thus the internal magnetic field is also variable. Again the changes in the nuclear energy generation induce structural changes that result in variations of the global solar parameters i.e., luminosity, radius and temperatures etc. From the analysis of total solar irradiance (TSI) data during the year from 1970 to 2003 we have found five phases within the solar activity cycle. The first phase (I) starts before two years from the sunspot minimum. The second phase (II) starts at the time of sunspot minimum and phase (III) starts before 2/3 years from sunspot maximum whereas phase (IV) starts at sunspot maximum and fifth phase (V) starts at after 2-3 years from sunspot maximum.

  9. Solar Energy Education. Humanities: activities and teacher's...

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

    and teacher's guide. Field test edition Citation Details In-Document Search Title: Solar Energy Education. Humanities: activities and teacher's guide. Field test edition ...

  10. The Ohio State University Readies for its Encore at the Solar...

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

    in the entire history of Solar Decathlon to have a roof covered entirely in thin film solar cells. Walter explained that since the competition's limits on roof size were...

  11. Gap between active and passive solar heating

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1985-01-01

    The gap between active and passive solar could hardly be wider. The reasons for this are discussed and advantages to narrowing the gap are analyzed. Ten years of experience in both active and passive systems are reviewed, including costs, frequent problems, performance prediction, performance modeling, monitoring, and cooling concerns. Trends are analyzed, both for solar space heating and for service water heating. A tendency for the active and passive technologies to be converging is observed. Several recommendations for narrowing the gap are presented.

  12. Solar Success Stories

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:Solar6 Solar Success

  13. LANGMUIR WAVE ACTIVITY: COMPARING THE ULYSSES SOLAR MINIMUM AND SOLAR MAXIMUM ORBITS

    E-Print Network [OSTI]

    California at Berkeley, University of

    ). The top three panels correspond to the southern segment of the solar minimum orbit; repeated passesLANGMUIR WAVE ACTIVITY: COMPARING THE ULYSSES SOLAR MINIMUM AND SOLAR MAXIMUM ORBITS R. J at the electron plasma frequency) during the solar minimum and solar maximum orbits of Ulysses. At high latitudes

  14. Can origin of the 2400-year cycle of solar activity be caused by solar inertial motion?

    E-Print Network [OSTI]

    Boyer, Edmond

    Can origin of the 2400-year cycle of solar activity be caused by solar inertial motion? I. Charva 1999 / Revised: 14 January 2000 / Accepted: 17 January 2000 Abstract. A solar activity cycle of about 2400 years has until now been of uncertain origin. Recent results indicate it is caused by solar

  15. Activ Solar | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'S FUTURE.EnergyWoodenDateSA Jump to: navigation,Dhabi,AcroActiv

  16. The Solar Activity in the Miocene Period In this Subthesis we study the solar activity in the Miocene (or Triassic)

    E-Print Network [OSTI]

    rays, short­wave radiations, the solar constant). One of the longest series of data is the records of UV and X­ray radi­ ation also show a strong correlation between the radiative energy flux and solarThe Solar Activity in the Miocene Period In this Subthesis we study the solar activity

  17. Solar energy education. Renewable energy activities for general...

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

    energy activities for general science Citation Details In-Document Search Title: Solar energy education. Renewable energy activities for general science You are...

  18. Neutrino flux variations and solar activity

    E-Print Network [OSTI]

    Ikhsanov, R N

    2003-01-01

    We investigate temporal variations of the solar neutrino flux in 1970-1997. The periods of 11, 5 and 2 years have been found in the variations of the neutrino flux. The results indicate that a periodicity close to 5 years is the most significant in the data from both the Homestake and GALLEX experiments. Two groups of the solar activity indices have been distinguished regarding their interconnection with the neutrino flux series. The first group contains the indices showing predominantly 11-year period, while a periodicity at approximately 5 years is observed in the second group. The correlation coefficients between the neutrino flux and indices from the first group are negative, with their module not exceeding 0.5. The second group is characterized by positive correlation with the neutrino counting rates with coefficients not lower than 0.6. A discussion of findings is presented.

  19. Petrovay: Solar physics Activity phenomena 1 Overall structure: umbra + penumbra.

    E-Print Network [OSTI]

    Petrovay, Kristóf

    Petrovay: Solar physics Activity phenomena 1 SUNSPOTS Overall structure: umbra + penumbra in decaying spots (hysteresis-like behaviour). #12;Petrovay: Solar physics Activity phenomena 1 Temperature, H2, CH, CN Maltby effect: Umbrae slightly hotter in solar maximum than in minimum. Recent studies

  20. RESEARCH ARTICLE Solar activity during gestation does not affect human

    E-Print Network [OSTI]

    Helle, Samuli

    is increased mutagenic ultraviolet (UVB) radiation during high solar activity that damages DNA. Here, the aim born during the years of high solar activity, measured as the sunspot numbers. We used data on annual). Such solar radiation-induced reduction of lifespan may be mediated by the increased mortality from cancer

  1. Experimental Research of an Active Solar Heating System 

    E-Print Network [OSTI]

    Gao, X.; Li, D.

    2006-01-01

    : Solar is an abundant renewable energy, which is used more and more frequently with the emphasis on environment protection, especially in building heating. The different devised methods between an active solar heating ...

  2. The solar interior - radial structure, rotation, solar activity cycle

    E-Print Network [OSTI]

    Axel Brandenburg

    2007-03-28

    Some basic properties of the solar convection zone are considered and the use of helioseismology as an observational tool to determine its depth and internal angular velocity is discussed. Aspects of solar magnetism are described and explained in the framework of dynamo theory. The main focus is on mean field theories for the Sun's magnetic field and its differential rotation.

  3. Solar Energy Education. Renewable energy activities for junior...

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

    junior highmiddle school science Citation Details In-Document Search Title: Solar Energy Education. Renewable energy activities for junior highmiddle school science You are...

  4. Solar Energy Education. Renewable energy activities for earth...

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

    earth science Citation Details In-Document Search Title: Solar Energy Education. Renewable energy activities for earth science You are accessing a document from the Department...

  5. Solar Energy Education. Renewable energy activities for biology...

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

    biology Citation Details In-Document Search Title: Solar Energy Education. Renewable energy activities for biology You are accessing a document from the Department of Energy's...

  6. Solar Energy Education. Social studies: activities and teacher...

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

    and teacher's guide. Field test edition Citation Details In-Document Search Title: Solar Energy Education. Social studies: activities and teacher's guide. Field test edition...

  7. THE 22-YEAR SOLAR MAGNETIC CYCLE. II. FLARE ACTIVITY

    E-Print Network [OSTI]

    THE 22-YEAR SOLAR MAGNETIC CYCLE. II. FLARE ACTIVITY G. MARI, M. D. POPESCU, A. C. DONEA, M. MIERLA cycle, a cycle that had an unexpected behaviour. Here we analyze the occurrence of the solar flares predicted of the current 11-year solar cycle. We conclude that it could be determined by a pulse of flare

  8. pg. 1 UW Clean Energy Institute Solar Car Derby Activity

    E-Print Network [OSTI]

    Hochberg, Michael

    ? (connect both sides of the motor to different leads from the solar panel.) #12;pg. 3 UW Clean Energy will run the other direction) Where do so solar panels usually go? ( on the roof of buildings or in flatpg. 1 UW Clean Energy Institute Solar Car Derby Activity Overview Raycatcher and SunZoom Lite Model

  9. Active Solar Heating | Department of Energy

    Energy Savers [EERE]

    Carolina home gets most of its space heating from the passive solar design, but the solar thermal system supplies both domestic hot water and a secondary radiant floor heating...

  10. Solar air-conditioning-active, hybrid and passive

    SciTech Connect (OSTI)

    Yellott, J. I.

    1981-04-01

    After a discussion of summer air conditioning requirements in the United States, active, hybrid, and passive cooling systems are defined. Active processes and systems include absorption, Rankine cycle, and a small variety of miscellaneous systems. The hybrid solar cooling and dehumidification technology of desiccation is covered as well as evaporative cooling. The passive solar cooling processes covered include convective, radiative and evaporative cooling. Federal and state involvement in solar cooling is then discussed. (LEW)

  11. Revisiting the question: Does high-latitude solar activity lead low-latitude solar activity in time phase?

    SciTech Connect (OSTI)

    Kong, D. F.; Qu, Z. N.; Guo, Q. L.

    2014-05-01

    Cross-correlation analysis and wavelet transform methods are used to investigate whether high-latitude solar activity leads low-latitude solar activity in time phase or not, using the data of the Carte Synoptique solar filaments archive from 1919 March to 1989 December. From the cross-correlation analysis, high-latitude solar filaments have a time lead of 12 Carrington solar rotations with respect to low-latitude ones. Both the cross-wavelet transform and wavelet coherence indicate that high-latitude solar filaments lead low-latitude ones in time phase. Furthermore, low-latitude solar activity is better correlated with high-latitude solar activity of the previous cycle than with that of the following cycle, which is statistically significant. Thus, the present study confirms that high-latitude solar activity in the polar regions is indeed better correlated with the low-latitude solar activity of the following cycle than with that of the previous cycle, namely, leading in time phase.

  12. The Solar Roofpod: Implications for New York City's Long-Term Sustainability Plan

    E-Print Network [OSTI]

    Wolberg, George

    The Solar Roofpod: Implications for New York City's Long-Term Sustainability Plan Objective: Present an analysis of the costs and benefits of City College's "Solar Roofpod" prototype pavilion as a finalist in the 2011 Solar Decathlon, a bi- annual competition among schools of architecture

  13. Solarize Guidebook | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:Solar6Energy Grid

  14. GONG p-mode frequency changes with solar activity

    E-Print Network [OSTI]

    A. Bhatnagar; Kiran Jain; S. C. Tripathy

    1999-04-01

    We present a correlation analysis of GONG p-mode frequencies with nine solar activity indices for the period 1995 August to 1997 August. This study includes spherical harmonic degree in the range 2 to 150 and the frequency range of 1500-3500 \\mu Hz. Using three statistical tests, the measured mean frequency shifts show strong to good correlation with activity indices. A decrease of 0.06 \\mu Hz in frequency, during the descending phase of solar cycle 22 and an increase of 0.04 \\mu Hz in the ascending phase of solar cycle 23 is observed. These results provide the first evidence for change in p-mode frequencies around the declining phase of solar cycle 22 and beginning of new cycle 23. This analysis further confirms that the temporal behaviour of the solar frequency shifts closely follow the phase of the solar activity cycle.

  15. Solar Wind: Manifestations of Solar Activity E N CYC LO PE D IA O F AS T R O N O MY AN D AS T R O PHYS I C S Solar Wind: Manifestations of Solar

    E-Print Network [OSTI]

    Webb, David F.

    Solar Wind: Manifestations of Solar Activity E N CYC LO PE D IA O F AS T R O N O MY AN D AS T R O PHYS I C S Solar Wind: Manifestations of Solar Activity The Sun's outer atmosphere, the corona, is continually heated and expands to create the solar wind. Solar activity waxes and wanes with the 11 yr cycle

  16. Solar Powering America Home | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:Solar PowerSolar Powering

  17. Solar Success Stories | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:Solar6 Solar

  18. Solar Swimming Pool Heaters | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:Solar6 SolarSwimming Pool

  19. Solar Water Heater Basics | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:Solar6 SolarSwimming

  20. Secretary of Energy Moniz Cuts Ribbon, Kicks Off Solar Decathlon...

    Office of Environmental Management (EM)

    are able to tour the houses, gather ideas to use in their own homes, and learn how energy-saving features can help them save money today. The overall winner will be...

  1. DOE's Solar Decathlon to Highlight Innovation, Future Green Jobs...

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

    its own power. The competition focuses on cutting edge energy efficient and renewable energy innovation while providing a unique green jobs training opportunity for each of the...

  2. Miami Students' Solar Decathlon Design Focused on Sustainability

    Broader source: Energy.gov [DOE]

    The 2011 Florida International University Team designed their home around the ability to use adjustable panels on the outside of the home -- to protect from everything from sunshine to hurricanes.

  3. University of Maryland's "WaterShed" Wins 2011 Solar Decathlon...

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

    each team for the competitions. The other half of the 1,000 total points were awarded for energy balance, energy measurements and student tasks. Though the students didn't stay in...

  4. Solar Decathlon 2013: Life After the Competition | Department...

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

    serves as student housing and university research facilities. | Photo courtesy of the Energy Department. Missouri University of Science and Technology's Chameleon House will join...

  5. Solar Decathlon 2013 Infographic: The Path to a Brighter Future |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher iSlide 1 More Documents &1000 Independence<ADepartment of Energy Our

  6. Solar Decathlon: How Do WE Do Efficiency? | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher iSlide 1 More Documents &1000 Independence<ADepartment ofWake of1 of

  7. Department of Energy Considers New Venue for Solar Decathlon 2013 |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electricLaboratory |Education at

  8. Energy Department Announces Second Solar Decathlon | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPL EnergyPlus,DepartmentFederalJuly 8,to WorkDepartment

  9. October 14, 2005: 2005 Solar Decathlon | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy AEnergy Managing853926 NewsORMAT NEVADAEnergy InnovationOctober 14, 2005: 2005

  10. Solar Decathlon 2011: The Visitor's Perspective | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyThe U.S. Department ofEnergy(Department or DOE)of

  11. Solar Decathlon 2013: Meet the Teams | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyThe U.S. Department ofEnergy(Department or DOE)ofEnergy It took six monthsArizona

  12. Solar Decathlon: Appalachian State Wins People's Choice Award |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyThe U.S. Department ofEnergy(Department or DOE)ofEnergy It tookRemarksDepartment

  13. Solar Decathlon 2013: Building Skills for Future Careers | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effect Photovoltaics -7541 *ImpactScience of SignaturesSoft0 SoilsEnergy

  14. Solar Decathlon 2015: Let the Competition Begin | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effect Photovoltaics -7541 *ImpactScience of SignaturesSoft0Raising MoreLet the

  15. Webtrends Archives by Fiscal Year - Solar Decathlon | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing ToolInternationalReport FY2014 - Employers139Webmaster Webmaster Web RequestsEnergy

  16. Middlebury Students Practice 'Self-Reliance' with Solar Decathlon House |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i nAand DOE SafetyofDepartment. "National Midcourse

  17. Checking in on Solar Decathlon 2011 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a lCaribElectricSouthApplying caulkChapter 9DesertVersion SepOctober,

  18. Vote for Your Favorite Solar Decathlon House | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyThe U.S.Lacledeutilities. TheEnergyEnergy mostJeff EricksontoAll thisVote for

  19. What Do You Think About Solar Decathlon? | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyThe U.S.Lacledeutilities.Energy The

  20. 2011 Solar Decathlon - The Volunteer's Perspective | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p u t y A s s i s t a nsecondof2011 Cost, the

  1. Solar Decathlon Opening Ceremony and VIP Ribbon Cutting | Department of

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLE DIRECTIVES PursuantEnergy Small|Energy

  2. Solar Decathlon: Rain and Shine | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLE DIRECTIVES PursuantEnergy Small|EnergyWake of

  3. Housing Innovation Awards at the Solar Decathlon | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergy HeadquartersFuelB IMSofNewsletterGuidingUpdate Webinar Slidess g n i r p S r eHousing

  4. Secretary Chu Congratulates Solar Decathlon Winners | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMay 13, 2015reportsDepartment ofNextDataWashington, D.C.

  5. Smart Meters Help Balance Energy Consumption at Solar Decathlon |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMayBuilding K-25 cleanup at

  6. Solar Decathlon 2013: Let the Building Begin | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMayBuilding K-25 cleanup atDepartment ofHow|

  7. Solar Decathlon 2013: Let the Building Begin | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMayBuilding K-25 cleanup atDepartment ofHow|Day 7

  8. Solar Decathlon 2013: Life After the Competition | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMayBuilding K-25 cleanup atDepartment ofHow|Day

  9. Solar Decathlon 2013: Meet the Teams | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMayBuilding K-25 cleanup atDepartment ofHow|DayArizona

  10. Solar Decathlon 2013: New Teams! New Location! | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMayBuilding K-25 cleanup atDepartment

  11. Vote for Your Favorite Solar Decathlon House | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment| Department of EnergyData compiled by Yan (Joann) Zhou

  12. Vote for Your Favorite Solar Decathlon House | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment| Department of EnergyData compiled by Yan (Joann) ZhouSTILE The

  13. Vote for Your Favorite Solar Decathlon House | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment| Department of EnergyData compiled by Yan (Joann) ZhouSTILE TheEASI

  14. Affordability Contest Adds New Dimension to Solar Decathlon 2011 |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment| DepartmentAL/FAL 99-01EnergyDepartment ofEnergyof8 -

  15. Are You Attending Solar Decathlon This Year? | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment of Energy Facilities By E-mail: YouAbsorption heat FindFOIAAmanda

  16. Solar Decathlon: How far did they travel? | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment of EnergyResearchers at the Energyone inU.S.TheWeToggle Routes on/off

  17. Vote for Your Favorite Solar Decathlon House | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment of EnergyResearchers at theAugust 1,VocationalOak RidgeIntroduction

  18. Vote for Your Favorite Solar Decathlon House | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment of EnergyResearchers at theAugust 1,VocationalOak RidgeIntroductionVote

  19. Energy Department Announces Student Teams for Solar Decathlon 2015 |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice ofofWind Projects | DepartmentRoofs, and Heating andDepartment

  20. Energy Department Announces Student Teams, Location for Solar Decathlon

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

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

  1. Are You Going to the Solar Decathlon? | Department of Energy

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

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

  2. How to Win a Solar Decathlon | Department of Energy

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

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

  3. Energy Department Announces Student Teams, New Location for Solar Decathlon

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels DataEnergyInformation Form EmployeeAvailable through SEE

  4. 2007 Solar Decathlon Closing Ceremony and Awards | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12 Beta-3 Racetracks Y-12 Beta-3of/Energy 1Energy 677 Fuel77

  5. Construction Begins for Solar Decathlon 2011 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electric vehicle (PEV)Day-June 22,FresnoSky)Nuclear8Under the|Location of

  6. DOE Solar Decathlon Coming to National Mall | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electricLaboratory | Department of EnergyofWASHINGTON, DC - U.S.Early

  7. DOE's Solar Decathlon to Highlight Innovation, Future Green Jobs |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electricLaboratory | version of the Frequently Asked Questions

  8. Solar-collector manufacturing activity, July through December, 1981

    SciTech Connect (OSTI)

    None

    1982-03-01

    Solar thermal collector and solar cell manufacturing activity is both summarized and tabulated. Data are compared for three survey periods (July through December, 1981; January through June, 1981; and July through December, 1980). Annual totals are also provided for the years 1979 through 1981. Data include total producer shipments, end use, market sector, imports and exports. (LEW)

  9. The Solar Wind, CMEs and the Origins of Heliospheric Activity

    E-Print Network [OSTI]

    release o Coronal holes o Source of high-speed solar wind #12;peter.gallagher@tcd.ie #12;#12;peter Parker => Parker Spiral: r - r0 = -(v/ )( - 0) o Winding angle: o Inclined at ~45º at 1 AU and ~90º by 10The Solar Wind, CMEs and the Origins of Heliospheric Activity Peter T. Gallagher School of Physics

  10. Annual DOE active solar heating and cooling contractors' review meeting. Premeeting proceedings and project summaries

    SciTech Connect (OSTI)

    None,

    1981-09-01

    Ninety-three project summaries are presented which discuss the following aspects of active solar heating and cooling: Rankine solar cooling systems; absorption solar cooling systems; desiccant solar cooling systems; solar heat pump systems; solar hot water systems; special projects (such as the National Solar Data Network, hybrid solar thermal/photovoltaic applications, and heat transfer and water migration in soils); administrative/management support; and solar collector, storage, controls, analysis, and materials technology. (LEW)

  11. The 2005 Solar D House 

    E-Print Network [OSTI]

    Garrison, M.

    2006-01-01

    Structural Insulated Panels (SIPs) are an innovative green-engineered material system used to construct the UT SolarD House. SIPs replace conventional stud or "stick frame" construction. They were made in a factory and shipped to our job site where..., and operated a totally solar-powered home with a home office and their transportation needs using a solar-charged vehicle. Organized by the U.S. Department of Energy and the National Renewable energy Laboratory, the Solar Decathlon competition challenges...

  12. NREL: International Activities - India Solar Resource Maps

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJessework usesof EnergyY-12Working withPhoto of theSolar EnergyInternational

  13. Solar Water Heating System Maintenance and Repair | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:Solar6 SolarSwimmingWater

  14. Is the current lack of solar activity only skin deep?

    E-Print Network [OSTI]

    Broomhall, A -M; Elsworth, Y; Fletcher, S T; New, R; 10.1088/0004-637X/700/2/L162

    2009-01-01

    The Sun is a variable star whose magnetic activity and total irradiance vary on a timescale of approximately 11 years. The current activity minimum has attracted considerable interest because of its unusual duration and depth. This raises the question: what might be happening beneath the surface where the magnetic activity ultimately originates? The surface activity can be linked to the conditions in the solar interior by the observation and analysis of the frequencies of the Sun's natural seismic modes of oscillation - the p modes. These seismic frequencies respond to changes in activity and are probes of conditions within the Sun. The Birmingham Solar-Oscillations Network (BiSON) has made measurements of p-mode frequencies over the last three solar activity cycles, and so is in a unique position to explore the current unusual and extended solar minimum. We show that the BiSON data reveal significant variations of the p-mode frequencies during the current minimum. This is in marked contrast to the surface ac...

  15. SolarBridge Technologies: Helping Solar Modules Speak the Language of the

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:Solar6Energy Grid |

  16. SolarTech: Sun Sets on Yesterday's Solar Permitting Practices | Department

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:Solar6Energy Grid |of

  17. THE MAGNETIC ENERGY-HELICITY DIAGRAM OF SOLAR ACTIVE REGIONS

    SciTech Connect (OSTI)

    Tziotziou, Kostas; Georgoulis, Manolis K.; Raouafi, Nour-Eddine

    2012-11-01

    Using a recently proposed nonlinear force-free method designed for single-vector magnetograms of solar active regions, we calculate the instantaneous free magnetic energy and relative magnetic helicity budgets in 162 vector magnetograms corresponding to 42 different active regions. We find a statistically robust, monotonic correlation between the free magnetic energy and the relative magnetic helicity in the studied regions. This correlation implies that magnetic helicity, in addition to free magnetic energy, may be an essential ingredient for major solar eruptions. Eruptive active regions appear well segregated from non-eruptive ones in both free energy and relative helicity with major (at least M-class) flares occurring in active regions with free energy and relative helicity exceeding 4 Multiplication-Sign 10{sup 31} erg and 2 Multiplication-Sign 10{sup 42} Mx{sup 2}, respectively. The helicity threshold agrees well with estimates of the helicity contents of typical coronal mass ejections.

  18. Radio Emissions from Solar Active Regions Jeongwoo Lee

    E-Print Network [OSTI]

    Radio Emissions from Solar Active Regions Jeongwoo Lee Physics Department, New Jersey Institute-resonant emission, produced by hot electrons gyrating in the coronal magnetic field. As a resonant mechanism, gyro-emission, the polarization of the ubiquitous free-free emission and a phenomenon of depolarization due to mode coupling

  19. Solar Energy Glossary | Department of Energy

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

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  20. Solar Energy Resource Basics | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015: Build itEnergy

  1. Solar Innovation Timeline | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015: BuildDepartmentInnovation

  2. Solar Mapping Resources | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:

  3. SOLAR ACTIVITY DETECTION AND PREDICTION USING IMAGE PROCESSING AND MACHINE LEARNING TECHNIQUES

    E-Print Network [OSTI]

    ABSTRACT SOLAR ACTIVITY DETECTION AND PREDICTION USING IMAGE PROCESSING AND MACHINE LEARNING for automatic detection and prediction of solar activities, including prominence eruptions, emerging flux. These methods can be used for automatic observation of solar activities and prediction of space weather that may

  4. UNCORRECTEDPROOF 2 A method to evaluate the level of solar activity at

    E-Print Network [OSTI]

    - 21 term prediction of solar activity because of its 22 great significance in applications (Wang et al been proposed to predict the level of solar activity 41 (e.g., see Li et al., 2001; Kane, 2001; Sello, 2001; 42 Hathaway, 1999). 43 Prediction of the long-term behavior of solar 44 activity is one

  5. Solar Energy Education. Renewable energy activities for chemistry...

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

    SALTS; SOLAR ENERGY; EDUCATION; ANODIZATION; SOLAR ABSORBERS; ALKANES; CHEMICAL COATING; CORROSION PROTECTION; DEPOSITION; ELECTROCHEMICAL COATING; ELECTROLYSIS; ENERGY;...

  6. Organic solar cells: An overview focusing on active layer morphology Travis L. Benanti & D. Venkataraman*

    E-Print Network [OSTI]

    Venkataraman, Dhandapani "DV"

    Review Organic solar cells: An overview focusing on active layer morphology Travis L. Benanti & D/acceptor blend, morphology, photovoltaic devices, plastic solar cells, thin films Abstract Solar cells heterojunction concept. This review provides an overview of organic solar cells. Topics covered include: a brief

  7. DISTRIBUTION OF ELECTRIC CURRENTS IN SOLAR ACTIVE REGIONS

    SciTech Connect (OSTI)

    Török, T.; Titov, V. S.; Miki?, Z.; Leake, J. E.; Archontis, V.; Linton, M. G.; Dalmasse, K.; Aulanier, G.; Kliem, B.

    2014-02-10

    There has been a long-standing debate on the question of whether or not electric currents in solar active regions are neutralized. That is, whether or not the main (or direct) coronal currents connecting the active region polarities are surrounded by shielding (or return) currents of equal total value and opposite direction. Both theory and observations are not yet fully conclusive regarding this question, and numerical simulations have, surprisingly, barely been used to address it. Here we quantify the evolution of electric currents during the formation of a bipolar active region by considering a three-dimensional magnetohydrodynamic simulation of the emergence of a sub-photospheric, current-neutralized magnetic flux rope into the solar atmosphere. We find that a strong deviation from current neutralization develops simultaneously with the onset of significant flux emergence into the corona, accompanied by the development of substantial magnetic shear along the active region's polarity inversion line. After the region has formed and flux emergence has ceased, the strong magnetic fields in the region's center are connected solely by direct currents, and the total direct current is several times larger than the total return current. These results suggest that active regions, the main sources of coronal mass ejections and flares, are born with substantial net currents, in agreement with recent observations. Furthermore, they support eruption models that employ pre-eruption magnetic fields containing such currents.

  8. Solar Projects on the Rise for New Mexico's Picuris and Zia Pueblos |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:Solar PowerSolar

  9. Prediction of solar activity from solar background magnetic field variations in cycles 21-23

    SciTech Connect (OSTI)

    Shepherd, Simon J. [School of Engineering, University of Bradford, Bradford, BD7 1DP (United Kingdom); Zharkov, Sergei I. [Department of Physics and Mathematics, University of Hull, Kingston upon Tyne, HU6 7RS (United Kingdom); Zharkova, Valentina V., E-mail: s.j.shepherd@brad.ac.uk, E-mail: s.zharkov@hull.ac.uk, E-mail: valentina.zharkova@northumbria.ac.uk [Department of Mathematics and Information Systems, University of Northumbria, Newcastle upon Tyne, NE2 8ST (United Kingdom)

    2014-11-01

    A comprehensive spectral analysis of both the solar background magnetic field (SBMF) in cycles 21-23 and the sunspot magnetic field in cycle 23 reported in our recent paper showed the presence of two principal components (PCs) of SBMF having opposite polarity, e.g., originating in the northern and southern hemispheres, respectively. Over a duration of one solar cycle, both waves are found to travel with an increasing phase shift toward the northern hemisphere in odd cycles 21 and 23 and to the southern hemisphere in even cycle 22. These waves were linked to solar dynamo waves assumed to form in different layers of the solar interior. In this paper, for the first time, the PCs of SBMF in cycles 21-23 are analyzed with the symbolic regression technique using Hamiltonian principles, allowing us to uncover the underlying mathematical laws governing these complex waves in the SBMF presented by PCs and to extrapolate these PCs to cycles 24-26. The PCs predicted for cycle 24 very closely fit (with an accuracy better than 98%) the PCs derived from the SBMF observations in this cycle. This approach also predicts a strong reduction of the SBMF in cycles 25 and 26 and, thus, a reduction of the resulting solar activity. This decrease is accompanied by an increasing phase shift between the two predicted PCs (magnetic waves) in cycle 25 leading to their full separation into the opposite hemispheres in cycle 26. The variations of the modulus summary of the two PCs in SBMF reveals a remarkable resemblance to the average number of sunspots in cycles 21-24 and to predictions of reduced sunspot numbers compared to cycle 24: 80% in cycle 25 and 40% in cycle 26.

  10. Maximum CME speed as an indicator of solar and geomagnetic activities , V.B. Yurchyshyn1

    E-Print Network [OSTI]

    relationships with one another. Although the relationship between the solar and geomagnetic activity indices hasMaximum CME speed as an indicator of solar and geomagnetic activities A. Kilcik1 , V.B. Yurchyshyn1 , V. Abramenko1 , P.R. Goode1 , N. Gopalswamy2 , A. Ozguc3 , J.P. Rozelot4 1 Big Bear Solar

  11. RADIO-DERIVED THREE-DIMENSIONAL STRUCTURE OF A SOLAR ACTIVE REGION

    E-Print Network [OSTI]

    ABSTRACT RADIO-DERIVED THREE-DIMENSIONAL STRUCTURE OF A SOLAR ACTIVE REGION by Samuel D. Tun Solar. This thesis presents the structure of the solar atmosphere above active region AR 10923, observed on 2006 Nov 10, as deduced from multi-wavelength studies including com- bined microwave observations from

  12. Evolution and Dynamics of a Solar Active Prominence

    E-Print Network [OSTI]

    Magara, Tetsuya

    2015-01-01

    The life of a solar active prominence, one of the most remarkable objects on the Sun, is full of dynamics; after first appearing on the Sun the prominence continuously evolves with various internal motions and eventually produces a global eruption toward the interplane- tary space. Here we report that the whole life of an active prominence is successfully re- produced by performing as long-term a magnetohydrodynamic simulation of a magnetized prominence plasma as was ever done. The simulation reveals underlying dynamic processes that give rise to observed properties of an active prominence: invisible subsurface flows self- consistently produce the cancellation of magnetic flux observed at the photosphere, while observed and somewhat counterintuitive strong upflows are driven against gravity by en- hanced gas pressure gradient force along a magnetic field line locally standing vertical. The most highlighted dynamic event, transition into an eruptive phase, occurs as a natural con- sequence of the self-consiste...

  13. Solar Flare Activity Closely Monitored | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLE DIRECTIVES PursuantEnergySolar Flare Activity Closely Monitored

  14. Statistical Models for Solar Flare Interval Distribution in Individual Active Regions

    E-Print Network [OSTI]

    Yuki Kubo

    2008-02-01

    This article discusses statistical models for solar flare interval distribution in individual active regions. We analyzed solar flare data in 55 active regions that are listed in the GOES soft X-ray flare catalog. We discuss some problems with a conventional procedure to derive probability density functions from any data set and propose a new procedure, which uses the maximum likelihood method and Akaike Information Criterion (AIC) to objectively compare some competing probability density functions. We found that lognormal and inverse Gaussian models are more likely models than the exponential model for solar flare interval distribution in individual active regions. The results suggest that solar flares do not occur randomly in time; rather, solar flare intervals appear to be regulated by solar flare mechanisms. We briefly mention a probabilistic solar flare forecasting method as an application of a solar flare interval distribution analysis.

  15. Radiation Belt Activity Indices and Solar Proton Event Alarm on the CRATERRE Project Web Site

    E-Print Network [OSTI]

    Radiation Belt Activity Indices and Solar Proton Event Alarm on the CRATERRE Project Web Site D--Two Radiation Belt Activity Indices, based on electron flux measurement >300 keV and >1.6 MeV, and one Solar updated. Index Terms- CRATERRE project, Radiation belts activity, Space environment I. INTRODUCTION

  16. Reconstructing Past Solar Activity using Meridian Solar Observations: the Case of the Royal Observatory of the Spanish Navy (1833-1840)

    E-Print Network [OSTI]

    Vaquero, J M

    2014-01-01

    Solar meridian observations have been used to evaluate the solar activity of the past. Some important examples are the solar meridian observations made at the Basilica of San Petronio in Bologna by several astronomers and the observations made by Hevelius published in his book Machina Coelestis. However, we do not know whether these observations, which were not aimed to estimate the solar activity, are reliable for evaluating solar activity. In this paper, we present the marginal notes about sunspots that are included in the manuscripts of the meridian solar observations made at the Royal Observatory of the Spanish Navy during the period 1833-1840. We compare these observations with other solar activity indices such as sunspot area and number. Our conclusion is that solar meridian observations should be used with extreme caution to evaluate past solar activity.

  17. Demo: Organic Solar Cell-equipped Energy Harvesting Active Networked Tag (EnHANT) Prototypes

    E-Print Network [OSTI]

    Carloni, Luca

    Demo: Organic Solar Cell-equipped Energy Harvesting Active Networked Tag (EnHANT) Prototypes Gerald their communications and networking parameters to the available environmental energy harvested by the organic solar harvesting, organic solar cells, ultra-low-power com- munications, ultra-wideband impulse radio, energy

  18. DEVELOPMENT OF ADVANCED ALGORITHMS TO DETECT, CHARACTERIZE AND FORECAST SOLAR ACTIVITIES

    E-Print Network [OSTI]

    . This is critical for determining the non-potentiality of active regions. Solar flares are generated by the sudden earth space environment (so called space weather). In this dissertation, an automated solar flare machine) to forecast the occurrences of solar flares based on photospheric magnetic features. Logistic

  19. The persistence of solar activity indicators and the descent of the Sun into Maunder Minimum conditions

    E-Print Network [OSTI]

    Lockwood, Mike

    as the Maunder Minimum (MM). This raises questions about the persistence and predictability of solar activity. We study the autocorrelation functions and predictability R2 L(t) of solar indices, particularly group prediction by Svalgaard et al. [2005] from the solar polar fields but is significantly lower than NOAA's most

  20. UHF Solar Powered Active Oscillator Antenna on Low Cost Flexible Substrate for Wireless Identification Applications

    E-Print Network [OSTI]

    Tentzeris, Manos

    UHF Solar Powered Active Oscillator Antenna on Low Cost Flexible Substrate for Wireless antenna using low cost flexible substrate materials is presented. Flexible amorphous silicon a-Si solar nature of the circuit and providing operational autonomy by harvesting solar power without affecting

  1. Subsurface and Atmospheric Influences on Solar Activity ASP Conference Series, Vol. 383, c 2008

    E-Print Network [OSTI]

    Lin, Yong

    hemisphere with the Swedish 1-m Solar Telescope on 26 August 2003. The upper panel shows the filament spineSubsurface and Atmospheric Influences on Solar Activity ASP Conference Series, Vol. 383, c 2008 R and their Interrelation Y. Lin,1 S. F. Martin,2 and O. Engvold1 Abstract. The main structural components of solar

  2. Embedding metal electrodes in thick active layers for ITO-free plasmonic organic solar cells

    E-Print Network [OSTI]

    Park, Namkyoo

    Embedding metal electrodes in thick active layers for ITO-free plasmonic organic solar cells%) in optical absorption over both a conventional ITO organic solar cell and a conventional plasmonic organic solar cell with top-loaded metallic grating is predicted in the proposed structure. Optimal positioning

  3. Intermittency Spectra of the Magnetic Field in Solar Active Valentyna Abramenko and Vasyl Yurchyshyn

    E-Print Network [OSTI]

    - Physical Data and Processes: turbulence 1. Introduction Energy release processes in solar active regions of the solar disk from January 1997 until December 2006 are utilized. Data from the Michelson Doppler Imager is straightforward and reliable. Another type of energy release is an impulsive process known as solar flares

  4. PHASE-SENSITIVE HOLOGRAPHY OF SOLAR ACTIVITY D. C. BRAUN, and C. LINDSEY

    E-Print Network [OSTI]

    Braun, Douglas C.

    acoustic radiation coming out of a particular point on the solar photosphere with acoustic radiation going applied techniques in phase- sensitive seismic holography to data from the Solar Oscillations, that sunspots and solar active regions are strong absorbers of incident acoustic (p-mode) radiation (Braun

  5. What influence will future solar activity changes over the 21st century have on projected global near-surface

    E-Print Network [OSTI]

    Lockwood, Mike

    What influence will future solar activity changes over the 21st century have on projected global underestimate the response to solar variations, then there is a potential for a reduction in solar activity will future solar activity changes over the 21st century have on projected global near-surface temperature

  6. Solar Energy Evolution and Diffusion Studies | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015: Build it

  7. Solar Energy in the United States | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015: Build

  8. Solar Energy to Benefit from New FERC Interconnection Procedures |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015: BuildDepartment of

  9. Solar Energy Technologies FY'14 Budget At-a-Glance | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015: Build itEnergySolar

  10. Solar Powered Bike Visits the Department of Energy | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015:Solar Power

  11. SIMULATION OF THE FORMATION OF A SOLAR ACTIVE REGION

    SciTech Connect (OSTI)

    Cheung, M. C. M.; Title, A. M. [Lockheed Martin Solar and Astrophysics Laboratory, Palo Alto, CA 94304 (United States); Rempel, M. [High Altitude Observatory, NCAR, P.O. Box 3000, Boulder, CO 80307 (United States); Schuessler, M. [Max Planck Institute for Solar System Research, Katlenburg-Lindau, 37191 (Germany)

    2010-09-01

    We present a radiative magnetohydrodynamics simulation of the formation of an active region (AR) on the solar surface. The simulation models the rise of a buoyant magnetic flux bundle from a depth of 7.5 Mm in the convection zone up into the solar photosphere. The rise of the magnetic plasma in the convection zone is accompanied by predominantly horizontal expansion. Such an expansion leads to a scaling relation between the plasma density and the magnetic field strength such that B {proportional_to} rhov{sup 1/2}. The emergence of magnetic flux into the photosphere appears as a complex magnetic pattern, which results from the interaction of the rising magnetic field with the turbulent convective flows. Small-scale magnetic elements at the surface first appear, followed by their gradual coalescence into larger magnetic concentrations, which eventually results in the formation of a pair of opposite polarity spots. Although the mean flow pattern in the vicinity of the developing spots is directed radially outward, correlations between the magnetic field and velocity field fluctuations allow the spots to accumulate flux. Such correlations result from the Lorentz-force-driven, counterstreaming motion of opposite polarity fragments. The formation of the simulated AR is accompanied by transient light bridges between umbrae and umbral dots. Together with recent sunspot modeling, this work highlights the common magnetoconvective origin of umbral dots, light bridges, and penumbral filaments.

  12. The origin of net electric currents in solar active regions

    E-Print Network [OSTI]

    Dalmasse, K; Démoulin, P; Kliem, B; Török, T; Pariat, E

    2015-01-01

    There is a recurring question in solar physics about whether or not electric currents are neutralized in active regions (ARs). This question was recently revisited using three-dimensional (3D) magnetohydrodynamic (MHD) numerical simulations of magnetic flux emergence into the solar atmosphere. Such simulations showed that flux emergence can generate a substantial net current in ARs. Another source of AR currents are photospheric horizontal flows. Our aim is to determine the conditions for the occurrence of net vs. neutralized currents with this second mechanism. Using 3D MHD simulations, we systematically impose line-tied, quasi-static, photospheric twisting and shearing motions to a bipolar potential magnetic field. We find that such flows: (1) produce both {\\it direct} and {\\it return} currents, (2) induce very weak compression currents - not observed in 2.5D - in the ambient field present in the close vicinity of the current-carrying field, and (3) can generate force-free magnetic fields with a net current...

  13. Solar Decathlon 2015: Vote for Your Favorite Solar-Powered House |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment of Energy Facilities By E-mail: You can sendofRows of battery

  14. Micro-events in the active and quiet solar corona

    E-Print Network [OSTI]

    Arnold O. Benz; Paolo C. Grigis

    2003-08-19

    The content of hot material in the corona is not constant. Soft X-ray and high-temperature EUV line observations show that new material, apparently heated and evaporated from the chromosphere, is frequently injected into the corona both in active and quiet regions. Active regions are found to exhibit transient brightenings, termed here microflares, due to such enhancements in emission measure. They appear at a rate of up to 10 per hour in RHESSI observations of 3--15 keV X-rays, occurring even during the periods of lowest solar activity so far in the mission. The RHESSI observations combined with measurements at other wavelengths yield estimates of the energy input into the corona. These observations suggest that the models for coronal heating must be complemented with respect to continuous replenishing the lower corona by chromospheric material heated to coronal temperatures. The observed micro-events are secondary phenomena and do not represent the primary energy release, nor its total amount. Nevertheless, they are an interesting source of information on the heating process(es) of the corona. The micro-events are compared to events in quiet regions, termed here nanoflares, which seem to be a different population, well separated in temperature and emission measure from microflares.

  15. Solar wind and geomagnetism: toward a standard classification of geomagnetic activity from 1868 to 2009

    E-Print Network [OSTI]

    Zerbo, J. L.

    We examined solar activity with a large series of geomagnetic data from 1868 to 2009. We have revisited the geomagnetic activity classification scheme of Legrand and Simon (1989) and improve their scheme by lowering the ...

  16. Subsurface and Atmospheric Influences on Solar Activity ASP Conference Series, Vol. 383, c 2008

    E-Print Network [OSTI]

    California at Berkeley, University of

    Subsurface and Atmospheric Influences on Solar Activity ASP Conference Series, Vol. 383, c 2008 R descriptions of the ambient coronal magnetic field struc- ture and the associated solar wind streams thanks twist, cur- rent sheets, and other unstable or energized configurations in the active region vicinity. 1

  17. United States and Caribbean tropical cyclone activity related to the solar cycle

    E-Print Network [OSTI]

    Elsner, James B.

    United States and Caribbean tropical cyclone activity related to the solar cycle J. B. Elsner1 related to solar activity. The relationship results from fewer intense tropical cyclones over the Caribbean and Gulf of Mexico when sunspot numbers are high. The finding is in accord with the heat- engine

  18. Materials design and the study of active interfaces for solar fuel synthesis devices

    E-Print Network [OSTI]

    Bergman, Keren

    SEMINAR Materials design and the study of active interfaces for solar fuel synthesis devices Dr devices. This is especially true for solar photoelectrocatalytic devices for fuel production, which and of active sites for electrocatalytic reactions. In this talk, I will discuss the design of materials

  19. Three-dimensional Structure of a Solar Active Region from Spatially and Spectrally Resolved Microwave Observations

    E-Print Network [OSTI]

    Three-dimensional Structure of a Solar Active Region from Spatially and Spectrally Resolved Microwave Observations Samuel D. Tun,1 sdt4@njit.edu Dale E. Gary1, Manolis K. Georgoulis2 Physics on the structure of the solar atmosphere above active region AR 10923, observed on 2006 Nov 10, as deduced from

  20. Coronal Currents, Magnetic Fields and Heating in a Solar Active Region

    E-Print Network [OSTI]

    White, Stephen

    Park, MD 20742 Abstract. We compare microwave images of a solar active region with stateCoronal Currents, Magnetic Fields and Heating in a Solar Active Region Jeongwoo Lee Astronomy the assumption that the microwave emission is dominated by optically thick gyroresonance radiation, we may use

  1. Solar activity can be surprisingly good for Last month, the sun went haywire. Almost every day for two weeks in early September, solar flares

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    Solar activity can be surprisingly good for astronauts Last month, the sun went haywire. Almost every day for two weeks in early September, solar flares issued from a giant sunspot named "active region 798/808." X-rays ionized Earth's upper atmosphere. Solar protons peppered the Moon

  2. Impact of solar activity on climate changes in Athens region, Greece

    E-Print Network [OSTI]

    Gizani, Nectaria A B; Vatikiotis, Leonidas; Zervas, Efthimios

    2011-01-01

    The scope of this work is to study the role that the solar weather plays in terrestrial weather. For this reason we study the effect of the solar activity on the climate changes in Greece. In the current work we look for possible correlation between the solar activity data spanning the years from 1975 to 2000 and the meteorological data from two weather stations based inside the city of Athens, Greece (New Philadelphia) and in greater Athens in the north of Attica (Tatoi area). We examine the annual variations of the average values of six meteorological parameters: temperature, atmospheric pressure, direction and intensity of wind, rainfall and relative air humidity. The solar data include decade variations, within the above period, of the solar irradiance, mean sunspot number between two solar cycles, magnetic cycle influence, and solar UV driving of climate (radio flux).

  3. Measurement of the Solar Neutrino Capture Rate by the Russian-American Gallium Solar Neutrino Experiment During One Half of the 22-Year Cycle of Solar Activity

    E-Print Network [OSTI]

    SAGE Collaboration; J. N. Abdurashitov

    2002-07-09

    We present the results of measurements of the solar neutrino capture rate in gallium metal by the Russian-American Gallium Experiment SAGE during slightly more than half of a 22-year cycle of solar activity. Combined analysis of the data of 92 runs during the 12-year period January 1990 through December 2001 gives a capture rate of solar neutrinos with energy more than 233 keV of 70.8 +5.3/-5.2 (stat.) +3.7/-3.2 (syst.) SNU. This represents only slightly more than half of the predicted standard solar model rate of 128 SNU. We give the results of new runs beginning in April 1998 and the results of combined analysis of all runs since 1990 during yearly, monthly, and bimonthly periods. Using a simple analysis of the SAGE results combined with those from all other solar neutrino experiments, we estimate the electron neutrino pp flux that reaches the Earth to be (4.6 +/- 1.1) E10/(cm^2-s). Assuming that neutrinos oscillate to active flavors the pp neutrino flux emitted in the solar fusion reaction is approximately (7.7 +/- 1.8) E10/(cm^2-s), in agreement with the standard solar model calculation of (5.95 +/- 0.06) E10/(cm^2-s).

  4. Influence of Solar Activity on State of Wheat Market in Medieval England

    E-Print Network [OSTI]

    Lev A. Pustilnik; Gregory Yom Din

    2003-12-09

    The database of Prof. Rogers (1887), which includes wheat prices in England in the Middle Ages, was used to search for a possible influence of solar activity on the wheat market. We present a conceptual model of possible modes for sensitivity of wheat prices to weather conditions, caused by solar cycle variations, and compare expected price fluctuations with price variations recorded in medieval England. We compared statistical properties of the intervals between wheat price bursts during years 1249-1703 with statistical properties of the intervals between minimums of solar cycles during years 1700-2000. We show that statistical properties of these two samples are similar, both for characteristics of the distributions and for histograms of the distributions. We analyze a direct link between wheat prices and solar activity in the 17th Century, for which wheat prices and solar activity data (derived from 10Be isotope) are available. We show that for all 10 time moments of the solar activity minimums the observed prices were higher than prices for the correspondent time moments of maximal solar activity (100% sign correlation, on a significance level solar activity.

  5. Magnetic helicity and energy spectra of a solar active region

    E-Print Network [OSTI]

    Zhang, Hongqi; Sokoloff, D D

    2013-01-01

    We compute magnetic helicity and energy spectra of the solar active region NOAA 11158 during 11-15 February 2011 at 20 degr southern heliographic latitude using observational photospheric vector magnetograms. We adopt the isotropic representation of the Fourier-transformed two-point correlation tensor of the magnetic field. The sign of magnetic helicity turns out to be predominantly positive at all wavenumbers. This sign is consistent with what is theoretically expected for the southern hemisphere. The relative magnetic helicity is around 8% and strongest at intermediate wavenumbers of k ~ 0.4 Mm^{-1}, corresponding to a scale of 2 pi/k ~ 16 Mm. The same sign and a somewhat smaller value is also found for the relative current helicity evaluated in real space based on the vertical components of magnetic field and current density. The current helicity spectrum is estimated from the magnetic helicity spectrum and its modulus shows a k^{-5/3} spectrum at large wavenumbers. A similar power law is also obtained for...

  6. Global analysis of active longitudes of solar X-ray flares L. Zhang a,b,c

    E-Print Network [OSTI]

    Usoskin, Ilya G.

    Global analysis of active longitudes of solar X-ray flares L. Zhang a,b,c , K. Mursula a,Ã, I: Solar X-rays Flares Active longitudes a b s t r a c t There is increasing evidence that various called active longitudes. We have earlier analyzed the longitudinal occurrence of solar X-ray flares

  7. IntrAst1 (Petrovay) The Sun SOLAR ACTIVITY IN THE PHOTOSPHERE

    E-Print Network [OSTI]

    Petrovay, Kristóf

    IntrAst1 (Petrovay) The Sun SOLAR ACTIVITY IN THE PHOTOSPHERE Sunspots: darker (colder) areas where-dark penumbra. #12;IntrAst1 (Petrovay) The Sun (Hinode) #12;IntrAst1 (Petrovay) The Sun The "uncombed" penumbra (Thomas et al. 2002) #12;IntrAst1 (Petrovay) The Sun Solar faculae: brighter areas near the edge

  8. Relationship between magnetic power spectrum and flare productivity in solar active regions

    E-Print Network [OSTI]

    Relationship between magnetic power spectrum and flare productivity in solar active regions V day, being equal to 1 when the specific flare productivity is one C1.0 flare per day. The power index.I. Abramenko Big Bear Solar Observatory, 40386 N. Shore Lane, Big Bear City, CA 92314, USA ABSTRACT Power

  9. Material and Chemical Processing (Concentrated Solar) (4 Activities...

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

    information about the student activitylesson plan from your search. Grades 5-8 Subject Solar Summary Concentrated sunlight is a versatile and high-quality form of energy with...

  10. xtreme space weather storms are driven by solar activity, which

    E-Print Network [OSTI]

    Wheatland, Michael S.

    magnetic fields (with field strengths up to 3000 gauss, or 0.3 tesla) emerge into the overlying atmosphere://solarscience.msfc.nasa.gov/SunspotCycle.shtml #12;The magnetic fields are generated inside the Sun by a "solar dynamo" driven by solar rotation, or of magnitude 10­4 tesla) and predominantly of one sign at the north pole and predominantly the opposite sign

  11. A Dynamic Solar Core Model: On the Activity-Related Changes of the Neutrino Fluxes

    E-Print Network [OSTI]

    Attila Grandpierre

    1998-10-08

    The energy sources of the Sun may actually involve a thermonuclear runaway energy source present in stellar energy producing regions. I consider the conjectures of the derived model for the solar neutrino fluxes in case of a solar core allowed to vary in relation to the surface activity cycle. The observed neutrino flux data suggest a solar core possibly varying in time. In the dynamic solar model the quiet and runaway energy sources together may produce quasi-constant flux in the SuperKamiokande because it is sensitive to neutral currents, axions and anti-neutrinos, too. I calculate the contributions of the runaway source to the individual neutrino detectors. The results of the dynamic solar core model suggest that since the HOMESTAKE detects mostly the high energy electron neutrinos, therefore the HOMESTAKE data may aniticorrelate with the activity cycle. Activity correlated changes are expected to be present only marginally in the GALLEX and GNO data. The gallium detectors are sensitive mostly to the pp neutrinos, and the changes of the pp neutrinos arising from the SSM-like core is mostly compensated by the high-energy electron neutrinos produced by the hot bubbles of the dynamic energy source. The results suggest that the GALLEX data may show an anti-correlation, while the SuperKamiokande data may show a correlation with the activity cycle. Predictions of the dynamic solar model are presented for the SNO and Borexino experiments which can distinguish between the effects of the MSW mechanism and the consequences of the dynamic solar model. The results of the dynamic solar model are consistent with the present heioseismic measurements and can be checked with future heioseismic measurements as well. Keywords: solar neutrino problems - solar activity - thermonuclear runaways

  12. VLF wave activity in the solar wind and the photoelectron effect in electric field measurements: Ulysses observations

    E-Print Network [OSTI]

    California at Berkeley, University of

    solar wind streams, Ulysses observed nearly continuous electric wave activity with peak power belowVLF wave activity in the solar wind and the photoelectron effect in electric field measurements present observations of very low frequency (VLF) waves (0.2 to 448 Hz) made by Ulysses during the solar

  13. FLARE ACTIVITY AND THE STRENGTH OF SOLAR CYCLES Miruna Daniela Popescu, Georgeta Mari, Adrian Oncica, Marilena Mierla

    E-Print Network [OSTI]

    FLARE ACTIVITY AND THE STRENGTH OF SOLAR CYCLES Miruna Daniela Popescu, Georgeta Mari, Adrian The paper evaluates the solar flare activity during the last three 11-year cycles (the period 1976 - 2001). The flare occurrence follows the solar cycle (SC) with some particularities for each class of flares

  14. Solar Energy Educational Material, Activities and Science Projects

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation ofAlbuquerque|Sensitive Species3performedValley | SystemSolarSolar Energy

  15. THE ACOUSTIC CUTOFF FREQUENCY OF THE SUN AND THE SOLAR MAGNETIC ACTIVITY CYCLE

    SciTech Connect (OSTI)

    Jimenez, A.; Palle, P. L.; Garcia, R. A.

    2011-12-20

    The acoustic cutoff frequency-the highest frequency for acoustic solar eigenmodes-is an important parameter of the solar atmosphere as it determines the upper boundary of the p-mode resonant cavities. At frequencies beyond this value, acoustic disturbances are no longer trapped but are traveling waves. Interference among them gives rise to higher-frequency peaks-the pseudomodes-in the solar acoustic spectrum. The pseudomodes are shifted slightly in frequency with respect to p-modes, making possible the use of pseudomodes to determine the acoustic cutoff frequency. Using data from the GOLF and VIRGO instruments on board the Solar and Heliospheric Observatory spacecraft, we calculate the acoustic cutoff frequency using the coherence function between both the velocity and intensity sets of data. By using data gathered by these instruments during the entire lifetime of the mission (1996 until the present), a variation in the acoustic cutoff frequency with the solar magnetic activity cycle is found.

  16. Towards solar activity maximum 24 as seen by GOLF and VIRGO/SPM instruments

    E-Print Network [OSTI]

    Garcia, R A; Mathur, S; Regulo, C; Ballot, J; Davies, G R; Jimenez, A; Simoniello, R

    2013-01-01

    All p-mode parameters vary with time as a response to the changes induced by the cyclic behavior of solar magnetic activity. After the unusual long solar-activity minimum between cycles 23 and 24, where the p-mode parameters have shown a different behavior than the surface magnetic proxies, we analyze the temporal variation of low-degree p-mode parameters measured by GOLF (in velocity) and VIRGO (in intensity) Sun-as-a-star instruments on board SoHO. We then compared our results with other activity proxies.

  17. Some notes concerning the prediction of the amplitude of the two solar activity cycles

    E-Print Network [OSTI]

    A. G. Tlatov

    2007-06-12

    The parameter G, which is determined from the general number of sunspots groups Ng according to the daily observations G=Sum(1/Ng)^2, is offered. This parameter is calculated for the days when there is at least one sunspots group. It characterizes the minimum epoch solar activity. Parameter G mounts to the maximum during the epoch close to the minimal activity of sunspots. According too the data of the sequence of sunspots group in Greenwich-USAF/NOAA observatory format, observation data of Kislovodsk solar station and also daily Wolf number the changes of parameter G during 100 years were reconstructed. It is demonstrated in the paper that parameter G's amplitude in minimal solar activity n is linked with the sunspot cycle's amplitude Wn+1. The 24th activity cycle prediction is calculated, which makes W24=135(+/-12).

  18. Coronal Magnetography of a Simulated Solar Active Region from Microwave Imaging Spectropolarimetry

    E-Print Network [OSTI]

    Wang, Zhitao; Fleishman, Gregory D; White, Stephen M

    2015-01-01

    We have simulated the Expanded Owens Valley Solar Array (EOVSA) radio images generated at multiple frequencies from a model solar active region, embedded in a realistic solar disk model, and explored the resulting datacube for different spectral analysis schemes to evaluate the potential for realizing one of EOVSA's most important scientific goals--coronal magnetography. In this paper, we focus on modeling the gyroresonance and free-free emission from an on-disk solar active region model with realistic complexities in electron density, temperature and magnetic field distribution. We compare the magnetic field parameters extrapolated from the image datacube along each line of sight after folding through the EOVSA instrumental profile with the original (unfolded) parameters used in the model. We find that even the most easily automated, image-based analysis approach (Level 0) provides reasonable quantitative results, although they are affected by systematic effects due to finite sampling in the Fourier (uv) pla...

  19. The Sun-like activity of the solar twin 18 Scorpii

    E-Print Network [OSTI]

    Jeffrey C. Hall; Gregory W. Henry; G. Wesley Lockwood

    2007-03-16

    We present the results of 10 yr of complementary spectroscopic and photometric observations of the solar twin 18 Scorpii. We show that over the course of its ~7 year chromospheric activity cycle, 18 Sco's brightness varies in the same manner as the Sun's and with a likely brightness variation of 0.09%, similar to the 0.1% decadal variation in the total solar irradiance.

  20. North-south asymmetry in solar activity: predicting the amplitude of the next solar cycle

    E-Print Network [OSTI]

    J. Javaraiah

    2007-01-31

    Using Greenwich and SOON sunspot group data during the period 1874 -- 2005, we find that the sums of the areas of the sunspot groups in $0^\\circ$ -- $10^\\circ$ latitude-interval of the Sun's northern hemisphere and in the time-interval, minus 1.35 year to plus 2.15 year from the time of the preceding minimum--and in the same latitude interval of the southern hemisphere but plus 1.0 year to plus 1.75 year from the time of the maximum--of a sunspot cycle are well correlating with the amplitude (maximum of the smoothed monthly sunspot number) of its immediate following cycle. Using this relationship it is possible to predict the amplitude of a sunspot cycle by about 9 -- 13 years in advance. We predicted $74 \\pm 10$ for the amplitude of the upcoming cycle~24. Variations in solar meridional flows during solar cycles and 9 -- 16 year variations in solar equatorial rotation may be responsible for the aforementioned relationship.

  1. SOLAR MAGNETIC ACTIVITY CYCLES, CORONAL POTENTIAL FIELD MODELS AND ERUPTION RATES

    SciTech Connect (OSTI)

    Petrie, G. J. D.

    2013-05-10

    We study the evolution of the observed photospheric magnetic field and the modeled global coronal magnetic field during the past 3 1/2 solar activity cycles observed since the mid-1970s. We use synoptic magnetograms and extrapolated potential-field models based on longitudinal full-disk photospheric magnetograms from the National Solar Observatory's three magnetographs at Kitt Peak, the Synoptic Optical Long-term Investigations of the Sun vector spectro-magnetograph, the spectro-magnetograph and the 512-channel magnetograph instruments, and from Stanford University's Wilcox Solar Observatory. The associated multipole field components are used to study the dominant length scales and symmetries of the coronal field. Polar field changes are found to be well correlated with active fields over most of the period studied, except between 2003 and 2006 when the active fields did not produce significant polar field changes. Of the axisymmetric multipoles, only the dipole and octupole follow the poles whereas the higher orders follow the activity cycle. All non-axisymmetric multipole strengths are well correlated with the activity cycle. The tilt of the solar dipole is therefore almost entirely due to active-region fields. The axial dipole and octupole are the largest contributors to the global field except while the polar fields are reversing. This influence of the polar fields extends to modulating eruption rates. According to the Computer Aided CME Tracking, Solar Eruptive Event Detection System, and Nobeyama radioheliograph prominence eruption catalogs, the rate of solar eruptions is found to be systematically higher for active years between 2003 and 2012 than for those between 1997 and 2002. This behavior appears to be connected with the weakness of the late-cycle 23 polar fields as suggested by Luhmann. We see evidence that the process of cycle 24 field reversal is well advanced at both poles.

  2. Heat Pipe Solar Receiver Development Activities at Sandia National Laboratories

    SciTech Connect (OSTI)

    Adkins, D.R.; Andraka, C.E.; Moreno, J.B.; Moss, T.A.; Rawlinson, K.S.; Showalter, S.K.

    1999-01-08

    Over the past decade, Sandia National Laboratories has been involved in the development of receivers to transfer energy from the focus of a parabolic dish concentrator to the heater tubes of a Stirling engine. Through the isothermal evaporation and condensation of sodium. a heat-pipe receiver can efficiently transfer energy to an engine's working fluid and compensate for irregularities in the flux distribution that is delivered by the concentrator. The operation of the heat pipe is completely passive because the liquid sodium is distributed over the solar-heated surface by capillary pumping provided by a wick structure. Tests have shown that using a heat pipe can boost the system performance by twenty percent when compared to directly illuminating the engine heater tubes. Designing heat pipe solar receivers has presented several challenges. The relatively large area ({approximately}0.2 m{sup 2}) of the receiver surface makes it difficult to design a wick that can continuously provide liquid sodium to all regions of the heated surface. Selecting a wick structure with smaller pores will improve capillary pumping capabilities of the wick, but the small pores will restrict the flow of liquid and generate high pressure drops. Selecting a wick that is comprised of very tine filaments can increase the permeability of the wick and thereby reduce flow losses, however, the fine wick structure is more susceptible to corrosion and mechanical damage. This paper provides a comprehensive review of the issues encountered in the design of heat pipe solar receivers and solutions to problems that have arisen. Topics include: flow characterization in the receiver, the design of wick systems. the minimization of corrosion and dissolution of metals in sodium systems. and the prevention of mechanical failure in high porosity wick structures.

  3. Department of Energy

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

    Energy.gov Solar Decathlon 2015 Solar Decathlon 2015 The competition is heating up at U.S. Department of Energy Solar Decathlon 2015 Go to energy.govsolardecathlon for full...

  4. CORRELATED STUDIES AT ACTIVITY MAXIMUM: THE SUN AND THE SOLAR WIND H. S. Hudson 1 and A. B. Galvin 2

    E-Print Network [OSTI]

    California at Berkeley, University of

    , University of Maryland, College Park, MD 20742, USA ABSTRACT The breadth and power of the set of solar1 CORRELATED STUDIES AT ACTIVITY MAXIMUM: THE SUN AND THE SOLAR WIND H. S. Hudson 1 and A. B at solar minimum or in the declining phase of the past maxi­ mum, but we anticipate that most

  5. Stellar activity as noise in exoplanet detection I. Methods and application to solar-like stars and activity cycles

    E-Print Network [OSTI]

    Korhonen, H; Piskunov, N; Hackman, T; Juncher, D; Jarvinen, S P; Joergensen, U G

    2015-01-01

    The detection of exoplanets using any method is prone to confusion due to the intrinsic variability of the host star. We investigate the effect of cool starspots on the detectability of the exoplanets around solar-like stars using the radial velocity method. For investigating this activity-caused "jitter" we calculate synthetic spectra using radiative transfer, known stellar atomic and molecular lines, different surface spot configurations, and an added planetary signal. Here, the methods are described in detail, tested and compared to previously published studies. The methods are also applied to investigate the activity jitter in old and young solar-like stars, and over a solar-like activity cycles. We find that the mean full jitter amplitude obtained from the spot surfaces mimicking the solar activity varies during the cycle approximately between 1 m/s and 9 m/s. With a realistic observing frequency a Neptune mass planet on a one year orbit can be reliably recovered. On the other hand, the recovery of an Ea...

  6. Come for Solar Decathlon, Stay for the Clean Energy XPO | Department...

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

    by art. It will also include the Makers Depot, an exhibition exploring how 3D printing is revolutionizing the creative process across a variety of industries. The Farm +...

  7. U.S. and Spain to Develop Solar Decathlon Europe | Department...

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

    Energy Efficiency and Renewable Energy Alexander Karsner and Spain's Undersecretary of Housing Fernando Magro Fernndez signed a Memorandum of Understanding (MOU) to collaborate...

  8. Solar Decathlon Homes -- They're Not Just for Show | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher iSlide 1 More Documents &1000 Independence<ADepartment of

  9. Impact Evaluation of the U.S. Department of Energys Solar Decathlon Program

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing Tool Fits the Bill FinancingDepartmentDatabase|BlogProfile:Water Heaters |843 Impact

  10. Solar Decathlon 2013: Designing the Houses of Today | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyThe U.S. Department ofEnergy(Department or DOE)ofEnergy It took six months andThe

  11. Solar Decathlon 2013: Designing the Houses of Today | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effect Photovoltaics -7541 *ImpactScience of SignaturesSoft0

  12. Solar Decathlon 2013: Raising More Than Just Walls | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effect Photovoltaics -7541 *ImpactScience of SignaturesSoft0Raising More Than Just

  13. Hangout with Solar Decathlon 2013 Teams on Sept. 18 at 2 pm ET | Department

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i nA Guide to TappingWORK BREAKDOWN STRUCTUREDepartment offor Septemberofof

  14. U.S. Department of Energy Solar Decathlon 2015 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyThe U.S.Laclede GasEfficiency|Feed Families" |1:00AM PDT to October 18, 2015

  15. U.S. and Colombia to Collaborate on First Solar Decathlon in Latin America

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLEStatutoryin the Nation's ElectricU.S. LNGDepartmentEnergyDepartment|

  16. Setting the Stage for the Next Solar Decathlon | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLE DIRECTIVES Pursuant to theDepartmentWork ForceSeptemberSetting the

  17. Solar Decathlon Team Leading the Way Toward Sustainable Living, Even in the

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OF APPLICABLE DIRECTIVES PursuantEnergy Small|EnergyWake of Disasters |

  18. Secretary Chu to Speak at Solar Decathlon 2011 Awards Ceremony | Department

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterestedReplacement-2-AA-1Research andAdministration'sDepartment ofNationalDepartmentof

  19. Purdue's "INhome" Rallies for the Solar Decathlon | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested PartiesBuildingBudget || Department ofDepartmentEnergyofEnergyToilets,

  20. Solar Decathlon at Home in the D.C. Community | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment ofOffice|inWestMayBuilding K-25 cleanup atDepartmentCompetition onForA

  1. U.S. Department of Energy Solar Decathlon 2015 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment| Department of Energy Office of IndianDOE DrugU.S.|1:00AM PDT to

  2. U.S. Department of Energy Solar Decathlon | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment| Department of Energy Office of IndianDOE DrugU.S.|1:00AM PDT

  3. Solar Decathlon 2015: Energy.gov Fan Favorite Poll Results | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment of EnergyResearchers at the Energyone inU.S.TheWe

  4. U.S. and Spain to Develop Solar Decathlon Europe | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann Jackson About1996HowFOAShowing YouNeedof Energy Fish andSmuggling |Spain to Develop

  5. University of Maryland's "WaterShed" Wins 2011 Solar Decathlon | Department

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann Jackson About1996HowFOAShowing YouNeedof EnergyMeetingBSHDepartment ofofKansasof

  6. Impact Evaluation of the U.S. Department of Energy's Solar Decathlon

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuelsof Energy ServicesContractingManagementSuccess, Company Doubles in Size |

  7. Where are They Now? In Search of Former Solar Decathlon Houses | Department

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report1538-1950DepartmentWave EnergyElectricity & Fuel »

  8. Come for Solar Decathlon, Stay for the Clean Energy XPO | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electric vehicle (PEV)

  9. Secretary of Energy Moniz Cuts Ribbon, Kicks Off Solar Decathlon 2015 |

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

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

  10. Level and length of cyclic solar activity during the Maunder minimum as deduced from the active day statistics

    E-Print Network [OSTI]

    Vaquero, J M; Usoskin, I G; Carrasco, V M S; Gallego, M C

    2015-01-01

    The Maunder minimum (MM) of greatly reduced solar activity took place in 1645-1715, but the exact level of sunspot activity is uncertain as based, to a large extent, on historical generic statements of the absence of spots on the Sun. Here we aim, using a conservative approach, to assess the level and length of solar cycle during the Maunder minimum, on the basis of direct historical records by astronomers of that time. A database of the active and inactive days (days with and without recorded sunspots on the solar disc respectively) is constructed for three models of different levels of conservatism (loose ML, optimum MO and strict MS models) regarding generic no-spot records. We have used the active day fraction to estimate the group sunspot number during the MM. A clear cyclic variability is found throughout the MM with peaks at around 1655--1657, 1675, 1684 and 1705, and possibly 1666, with the active day fraction not exceeding 0.2, 0.3 or 0.4 during the core MM, for the three models. Estimated sunspot nu...

  11. Periodic analysis of solar activity and its link with the Arctic oscillation phenomenon

    SciTech Connect (OSTI)

    Qu, Weizheng; Li, Chun; Du, Ling; Huang, Fei [Ocean University of China, 14-1'-601, 2117 Jinshui Road, Qingdao 266100 (China); Li, Yanfang, E-mail: quweizhe@ouc.edu.cn [Yantai Institute of Coastal Zone Research Chinese Academy of Sciences (China)

    2014-12-01

    Based on spectrum analysis, we provide the arithmetic expressions of the quasi 11 yr cycle, 110 yr century cycle of relative sunspot numbers, and quasi 22 yr cycle of solar magnetic field polarity. Based on a comparative analysis of the monthly average geopotential height, geopotential height anomaly, and temperature anomaly of the northern hemisphere at locations with an air pressure of 500 HPa during the positive and negative phases of AO (Arctic Oscillation), one can see that the abnormal warming period in the Arctic region corresponds to the negative phase of AO, while the anomalous cold period corresponds to its positive phase. This shows that the abnormal change in the Arctic region is an important factor in determining the anomalies of AO. In accordance with the analysis performed using the successive filtering method, one can see that the AO phenomenon occurring in January shows a clear quasi 88 yr century cycle and quasi 22 yr decadal cycle, which are closely related to solar activities. The results of our comparative analysis show that there is a close inverse relationship between the solar activities (especially the solar magnetic field index changes) and the changes in the 22 yr cycle of the AO occurring in January, and that the two trends are basically opposite of each other. That is to say, in most cases after the solar magnetic index MI rises from the lowest value, the solar magnetic field turns from north to south, and the high-energy particle flow entering the Earth's magnetosphere increases to heat the polar atmosphere, thus causing the AO to drop from the highest value; after the solar magnetic index MI drops from the highest value, the solar magnetic field turns from south to north, and the solar high-energy particle flow passes through the top of the Earth's magnetosphere rather than entering it to heat the polar atmosphere. Thus the polar temperature drops, causing the AO to rise from the lowest value. In summary, the variance contribution rate of the changes in the quasi 110 yr century cycle and quasi 22 yr decadal cycle for the AO reaches 62.9%, indicating that solar activity is an important driving factor of the AO.

  12. On the relationship between cosmic rays, solar activity and powerful earthquakes

    E-Print Network [OSTI]

    Mikhail Kovalyov; Selena Kovalyov

    2015-02-10

    In this paper we analyze the correlation of cosmic rays intensity to increases in seismic activity. We also show that high-magnitude earthquakes appear in group. As a prequel, we discuss in \\S1 naive visualization of the solar-cosmic ray interplay.

  13. Office of Energy Efficiency & Renewable Energy | Department of...

    Office of Environmental Management (EM)

    more Energy Secretary Moniz Launches Solar Decathlon 2015 Energy Secretary Moniz Launches Solar Decathlon 2015 Secretary Moniz kicked off our competition that challenges collegiate...

  14. Office of Energy Efficiency & Renewable Energy | Department of...

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

    Energy Secretary Moniz Launches Solar Decathlon 2015 Energy Secretary Moniz Launches Solar Decathlon 2015 Secretary Moniz kicked off our competition that challenges collegiate...

  15. Did geomagnetic activity challenge electric power reliability during solar cycle 23? Evidence from the PJM regional transmission

    E-Print Network [OSTI]

    Schrijver, Karel

    geomagnetic storm on 13 March 1989 contributed to the collapse of the Hydro-Quebec power system in CanadaDid geomagnetic activity challenge electric power reliability during solar cycle 23? Evidence from addresses whether geomagnetic activity challenged power system reliability during Solar Cycle 23. Operations

  16. On the current solar magnetic activity in the light of its behaviour during the Holocene

    E-Print Network [OSTI]

    Inceoglu, F; Knudsen, M F; Karoff, C; Olsen, J; Turck-Chièze, S

    2015-01-01

    Solar modulation potential (SMP) reconstructions based on cosmogenic nuclide records reflect changes in the open solar magnetic field and can therefore help us obtain information on the behaviour of the open solar magnetic field over the Holocene period. We aim at comparing the Sun's large-scale magnetic field behaviour over the last three solar cycles with variations in the SMP reconstruction through the Holocene epoch. To achieve these objectives, we use the IntCal13 $^{14}$C data to investigate distinct patterns in the occurrences of grand minima and maxima during the Holocene period. We then check whether these patterns might mimic the recent solar magnetic activity by investigating the evolution of the energy in the Sun's large-scale dipolar magnetic field using the Wilcox Solar Observatory data. The cosmogenic radionuclide data analysis shows that $\\sim$71\\% of grand maxima during the period from 6600 BC to 1650 AD were followed by a grand minimum. The occurrence characteristics of grand maxima and mini...

  17. Static and Dynamic Modeling of a Solar Active Region. I: Soft X-Ray Emission

    E-Print Network [OSTI]

    Harry P. Warren; Amy R. Winebarger

    2006-09-01

    Recent simulations of solar active regions have shown that it is possible to reproduce both the total intensity and the general morphology of the high temperature emission observed at soft X-ray wavelengths using static heating models. There is ample observational evidence, however, that the solar corona is highly variable, indicating a significant role for dynamical processes in coronal heating. Because they are computationally demanding, full hydrodynamic simulations of solar active regions have not been considered previously. In this paper we make first application of an impulsive heating model to the simulation of an entire active region, AR8156 observed on 1998 February 16. We model this region by coupling potential field extrapolations to full solutions of the time-dependent hydrodynamic loop equations. To make the problem more tractable we begin with a static heating model that reproduces the emission observed in 4 different \\textit{Yohkoh} Soft X-Ray Telescope (SXT) filters and consider dynamical heating scenarios that yield time-averaged SXT intensities that are consistent with the static case. We find that it is possible to reproduce the total observed soft X-ray emission in all of the SXT filters with a dynamical heating model, indicating that nanoflare heating is consistent with the observational properties of the high temperature solar corona.

  18. Evolution of Magnetic Helicity and Energy Spectra of Solar Active Regions

    E-Print Network [OSTI]

    Zhang, Hongqi; Sokoloff, D D

    2015-01-01

    We adopt an isotropic representation of the Fourier-transformed two-point correlation tensor of the magnetic field for estimating magnetic energy and helicity spectra as well as current helicity spectra of individual active regions and the change of their spectral indices with the solar cycle. The departure of the spectral index of current helicity from 5/3 is analyzed, and it is found that it is lower than that of magnetic energy. There is no obvious relationship between the change of the normalized magnetic helicity and the integral scale of the magnetic field for individual active regions. The evolution of the spectral index reflects the development and distribution of various scales of magnetic structures in active regions. It is found that around solar maximum the magnetic energy and helicity spectra are steeper.

  19. Solar Energy Technologies Office FY 2016 Budget At-A-Glance

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideoSolar Decathlon 2015: Build itEnergySolarU.S.

  20. edition Not Available 14 SOLAR ENERGY; SOLAR ENERGY; EDUCATIONAL...

    Office of Scientific and Technical Information (OSTI)

    Home economics: student activities. Field test edition Not Available 14 SOLAR ENERGY; SOLAR ENERGY; EDUCATIONAL TOOLS; CURRICULUM GUIDES; GLAZING; HOUSES; SOLAR COOKERS; SOLAR...

  1. An Improved Virial Estimate of Solar Active Region Energy

    E-Print Network [OSTI]

    M. S. Wheatland; T. R. Metcalf

    2005-09-21

    The MHD virial theorem may be used to estimate the magnetic energy of active regions based on vector magnetic fields measured at the photosphere or chromosphere. However, the virial estimate depends on the measured vector magnetic field being force-free. Departure from force-freeness leads to an unknown systematic error in the virial energy estimate, and an origin dependence of the result. We present a method for estimating the systematic error by assuming that magnetic forces are confined to a thin layer near the photosphere. If vector magnetic field measurements are available at two levels in the low atmosphere (e.g. the photosphere and the chromosphere), the systematic error may be directly calculated using the observed horizontal and vertical field gradients, resulting in an energy estimate which is independent of the choice of origin. If (as is generally the case) measurements are available at only one level, the systematic error may be approximated using the observed horizontal field gradients together with a simple linear force-free model for the vertical field gradients. The resulting `improved' virial energy estimate is independent of the choice of origin, but depends on the choice of the model for the vertical field gradients, i.e. the value of the linear force-free parameter $\\alpha$. This procedure is demonstrated for five vector magnetograms, including a chromospheric magnetogram.

  2. Static and Impulsive Models of Solar Active Regions

    E-Print Network [OSTI]

    S. Patsourakos; J. A. Klimchuk

    2008-08-20

    The physical modeling of active regions (ARs) and of the global coronal is receiving increasing interest lately. Recent attempts to model ARs using static equilibrium models were quite successful in reproducing AR images of hot soft X-ray (SXR) loops. They however failed to predict the bright EUV warm loops permeating ARs: the synthetic images were dominated by intense footpoint emission. We demonstrate that this failure is due to the very weak dependence of loop temperature on loop length which cannot simultaneously account for both hot and warm loops in the same AR. We then consider time-dependent AR models based on nanoflare heating. We demonstrate that such models can simultaneously reproduce EUV and SXR loops in ARs. Moreover, they predict radial intensity variations consistent with the localized core and extended emissions in SXR and EUV AR observations respectively. We finally show how the AR morphology can be used as a gauge of the properties (duration, energy, spatial dependence, repetition time) of the impulsive heating.

  3. Activity Related Variations of High-Degree p-Mode Amplitude, Width and Energy in Solar Active Regions

    E-Print Network [OSTI]

    Maurya, R A; Chae, J

    2013-01-01

    We study the properties of high degree p-mode oscillations in flaring and dormant ARs and compare them with those in corresponding quiet regions (QRs) to find the association of mode parameters with magnetic and flare related activities. Our analysis of several flaring and dormant ARs, showed strong association of mode amplitude, width and energy with magnetic and flare activities although their changes are combined effects of foreshortening, filling factor, magnetic activity, flare activity, and measurement uncertainties. We find that the largest decrease in mode amplitude and background power of an AR are caused by the angular distance of the AR from the solar disc centre. After correcting the mode parameters for foreshortening and filling factor, we find that the mode amplitude of flaring and dormant ARs are smaller than in corresponding QRs, and decreases with increasing MAI suggesting a larger mode power suppression in ARs with stronger magnetic fields. The mode widths in ARs are larger than in correspon...

  4. Concentrating Solar Power

    SciTech Connect (OSTI)

    Not Available

    2008-09-01

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

  5. MAGNETIC NONPOTENTIALITY IN PHOTOSPHERIC ACTIVE REGIONS AS A PREDICTOR OF SOLAR FLARES

    SciTech Connect (OSTI)

    Yang Xiao; Lin Ganghua; Zhang Hongqi; Mao Xinjie

    2013-09-10

    Based on several magnetic nonpotentiality parameters obtained from the vector photospheric active region magnetograms obtained with the Solar Magnetic Field Telescope at the Huairou Solar Observing Station over two solar cycles, a machine learning model has been constructed to predict the occurrence of flares in the corresponding active region within a certain time window. The Support Vector Classifier, a widely used general classifier, is applied to build and test the prediction models. Several classical verification measures are adopted to assess the quality of the predictions. We investigate different flare levels within various time windows, and thus it is possible to estimate the rough classes and erupting times of flares for particular active regions. Several combinations of predictors have been tested in the experiments. The True Skill Statistics are higher than 0.36 in 97% of cases and the Heidke Skill Scores range from 0.23 to 0.48. The predictors derived from longitudinal magnetic fields do perform well, however, they are less sensitive in predicting large flares. Employing the nonpotentiality predictors from vector fields improves the performance of predicting large flares of magnitude {>=}M5.0 and {>=}X1.0.

  6. NEW VACUUM SOLAR TELESCOPE OBSERVATIONS OF A FLUX ROPE TRACKED BY A FILAMENT ACTIVATION

    SciTech Connect (OSTI)

    Yang, Shuhong; Zhang, Jun; Liu, Zhong; Xiang, Yongyuan E-mail: zjun@nao.cas.cn

    2014-04-01

    One main goal of the New Vacuum Solar Telescope (NVST) which is located at the Fuxian Solar Observatory is to image the Sun at high resolution. Based on the high spatial and temporal resolution NVST H? data and combined with the simultaneous observations from the Solar Dynamics Observatory for the first time, we investigate a flux rope tracked by filament activation. The filament material is initially located at one end of the flux rope and fills in a section of the rope; the filament is then activated by magnetic field cancellation. The activated filament rises and flows along helical threads, tracking the twisted flux rope structure. The length of the flux rope is about 75 Mm, the average width of its individual threads is 1.11 Mm, and the estimated twist is 1?. The flux rope appears as a dark structure in H? images, a partial dark and partial bright structure in 304 Å, and as a bright structure in 171 Å and 131 Å images. During this process, the overlying coronal loops are quite steady since the filament is confined within the flux rope and does not erupt successfully. It seems that, for the event in this study, the filament is located and confined within the flux rope threads, instead of being suspended in the dips of twisted magnetic flux.

  7. Variations of 14-C around AD 775 and AD 1795 - due to solar activity

    E-Print Network [OSTI]

    Neuhaeuser, Ralph

    2015-01-01

    The motivation for our study is the disputed cause for the strong variation of 14-C around AD 775. Our method is to compare the 14-C variation around AD 775 with other periods of strong variability. Our results are: (a) We see three periods, where 14-C varied over 200 yr in a special way showing a certain pattern of strong secular variation: after a Grand Minimum with strongly increasing 14-C, there is a series of strong short-term drop(s), rise(s), and again drop(s) within 60 yr, ending up to 200 yr after the start of the Grand Minimum. These three periods include the strong rises around BC 671, AD 775, and AD 1795. (b) We show with several solar activity proxies (radioisotopes, sunspots, and aurorae) for the AD 770s and 1790s that such intense rapid 14-C increases can be explained by strong rapid decreases in solar activity and, hence, wind, so that the decrease in solar modulation potential leads to an increase in radioisotope production. (c) The strong rises around AD 775 and 1795 are due to three effects...

  8. Statistical study of free magnetic energy and flare productivity of solar active regions

    SciTech Connect (OSTI)

    Su, J. T.; Jing, J.; Wang, S.; Wang, H. M. [Space Weather Research Laboratory, New Jersey Institute of Technology, University Heights, Newark, NJ 07102-1982 (United States); Wiegelmann, T., E-mail: sjt@bao.ac.cn [Max-Planck-Institut fur Sonnensystemforschung, Max-Planck-Strasse 2, D-37191 Katlenburg-Lindau (Germany)

    2014-06-20

    Photospheric vector magnetograms from the Helioseismic and Magnetic Imager on board the Solar Dynamic Observatory are utilized as the boundary conditions to extrapolate both nonlinear force-free and potential magnetic fields in solar corona. Based on the extrapolations, we are able to determine the free magnetic energy (FME) stored in active regions (ARs). Over 3000 vector magnetograms in 61 ARs were analyzed. We compare FME with the ARs' flare index (FI) and find that there is a weak correlation (<60%) between FME and FI. FME shows slightly improved flare predictability relative to the total unsigned magnetic flux of ARs in the following two aspects: (1) the flare productivity predicted by FME is higher than that predicted by magnetic flux and (2) the correlation between FI and FME is higher than that between FI and magnetic flux. However, this improvement is not significant enough to make a substantial difference in time-accumulated FI, rather than individual flare, predictions.

  9. Particle dynamics in a non-flaring solar active region model

    E-Print Network [OSTI]

    Threlfall, J; Neukirch, T; Parnell, C E

    2015-01-01

    The aim of this work is to investigate and characterise particle behaviour in a (observationally-driven) 3D MHD model of the solar atmosphere above a slowly evolving, non-flaring active region. We use a relativistic guiding-centre particle code to investigate particle acceleration in a single snapshot of the 3D MHD simulation. Despite the lack of flare-like behaviour in the active region, direct acceleration of electrons and protons to non-thermal energies ($\\lesssim420$MeV) was found, yielding spectra with high-energy tails which conform to a power law. Examples of particle dynamics, including particle trapping caused by local electric rather than magnetic field effects, are observed and discussed, together with implications for future experiments which simulate non-flaring active region heating and reconnection.

  10. Active barrier films of PET for solar cell application: Processing and characterization

    SciTech Connect (OSTI)

    Rossi, Gabriella; Scarfato, Paola; Incarnato, Loredana [Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132 - 84084 Fisciano (Italy)

    2014-05-15

    A preliminary investigation was carried out on the possibility to improve the protective action offered by the standard multilayer structures used to encapsulate photovoltaic devices. With this aim, a commercial active barrier PET-based material, able to absorb oxygen when activated by liquid water, was used to produce flexible and transparent active barrier films, by means of a lab-scale film production plant. The obtained film, tested in terms of thermal, optical and oxygen absorption properties, shows a slow oxygen absorption kinetics, an acceptable transparency and an easy roll-to-roll processability, so proving itself as a good candidate for the development of protective coating for solar cells against the atmospheric degradation agents like the rain.

  11. The Energetics of a Flaring Solar Active Region, and Observed Flare Statistics

    E-Print Network [OSTI]

    M. S. Wheatland

    2008-02-26

    A stochastic model for the energy of a flaring solar active region is presented, generalising and extending the approach of Wheatland & Glukhov (1998). The probability distribution for the free energy of an active region is described by the solution to a master equation involving deterministic energy input and random jump transitions downwards in energy (solar flares). It is shown how two observable distributions, the flare frequency-energy distribution and the flare waiting-time distribution, may be derived from the steady-state solution to the master equation, for given choices for the energy input and for the rates of flare transitions. An efficient method of numerical solution of the steady-state master equation is presented. Solutions appropriate for flaring, involving a constant rate of energy input and power-law distributed jump transition rates, are numerically investigated. The flare-like solutions exhibit power-law flare frequency-energy distributions below a high energy rollover, set by the largest energy the active region is likely to have. The solutions also exhibit approximately exponential (i.e. Poisson) waiting-time distributions, despite the rate of flaring depending on the free energy of the system.

  12. Measurements of Non-Thermal Line Widths in Solar Active Regions

    E-Print Network [OSTI]

    Brooks, David H

    2015-01-01

    Spectral line widths are often observed to be larger than can be accounted for by thermal and instrumental broadening alone. This excess broadening is a key observational constraint for both nanoflare and wave dissipation models of coronal heating. Here we present a survey of non-thermal velocities measured in the high temperature loops (1--5MK) often found in the cores of solar active regions. This survey of $\\textit{Hinode}$ Extreme Ultraviolet Imaging Spectrometer (EIS) observations covers 15 non-flaring active regions that span a wide range of solar conditions. We find relatively small non-thermal velocities, with a mean value of 17km s$^{-1}$, and no significant trend with temperature or active region magnetic flux. These measurements appear to be inconsistent with those expected from reconnection jets in the corona, chromospheric evaporation induced by coronal nanoflares, and Alfv\\'en wave turbulence models. Furthermore, because the observed non-thermal widths are generally small their measurements are ...

  13. Planar micro-optic solar concentration

    E-Print Network [OSTI]

    Karp, Jason Harris

    2010-01-01

    12] A.Rabl, Active Solar Collectors and Their Applications (23, A.Rabl, Active Solar Collectors and Their Applications (Rabl, A. , [Active Solar Collectors and Their Applications],

  14. A SYSTEMATIC SURVEY OF HIGH-TEMPERATURE EMISSION IN SOLAR ACTIVE REGIONS

    SciTech Connect (OSTI)

    Warren, Harry P. [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States); Winebarger, Amy R. [NASA Marshall Space Flight Center, VP 62, Huntsville, AL 35812 (United States); Brooks, David H. [College of Science, George Mason University, 4400 University Drive, Fairfax, VA 22030 (United States)

    2012-11-10

    The recent analysis of observations taken with the EUV Imaging Spectrometer and X-Ray Telescope instruments on Hinode suggests that well-constrained measurements of the temperature distribution in solar active regions can finally be made. Such measurements are critical for constraining theories of coronal heating. Past analysis, however, has suffered from limited sample sizes and large uncertainties at temperatures between 5 and 10 MK. Here we present a systematic study of the differential emission measure distribution in 15 active region cores. We focus on measurements in the 'inter-moss' region, that is, the region between the loop footpoints, where the observations are easier to interpret. To reduce the uncertainties at the highest temperatures we present a new method for isolating the Fe XVIII emission in the AIA/SDO 94 A channel. The resulting differential emission measure distributions confirm our previous analysis showing that the temperature distribution in an active region core is often strongly peaked near 4 MK. We characterize the properties of the emission distribution as a function of the total unsigned magnetic flux. We find that the amount of high-temperature emission in the active region core is correlated with the total unsigned magnetic flux, while the emission at lower temperatures, in contrast, is inversely related. These results provide compelling evidence that high-temperature active region emission is often close to equilibrium, although weaker active regions may be dominated by evolving million degree loops in the core.

  15. Chaotic mean wind in turbulent thermal convection and long-term correlations in solar activity

    E-Print Network [OSTI]

    A. Bershadskii

    2009-12-25

    It is shown that correlation function of the mean wind velocity in a turbulent thermal convection (Rayleigh number $Ra \\sim 10^{11}$) exhibits exponential decay with a very long correlation time, while corresponding largest Lyapunov exponent is certainly positive. These results together with the reconstructed phase portrait indicate presence of a chaotic component in the examined mean wind. Telegraph approximation is also used to study relative contribution of the chaotic and stochastic components to the mean wind fluctuations and an equilibrium between these components has been studied. Since solar activity is based on the thermal convection processes, it is reasoned that the observed solar activity long-term correlations can be an imprint of the mean wind chaotic properties. In particular, correlation function of the daily sunspots number exhibits exponential decay with a very long correlation time and corresponding largest Lyapunov exponent is certainly positive, also relative contribution of the chaotic and stochastic components follows the same pattern as for the convection mean wind.

  16. High-wavenumber solar $f$-mode strengthening prior to active region formation

    E-Print Network [OSTI]

    Singh, Nishant K; Brandenburg, Axel

    2016-01-01

    Using the solar surface mode, i.e. the $f$-mode, we attempt to predict the emergence of active regions (ARs) in the days before they can be seen in magnetograms. Our study is motivated by earlier numerical findings of Singh et al. (2014) who showed that, in the presence of a nonuniform magnetic field which is concentrated a few scale heights below the surface, the $f$-mode fans out in the diagnostic $k\\omega$ diagram at high wavenumbers. Here we exploit this property using data from the Helioseismic and Magnetic Imager aboard the Solar Dynamics Observatory, and show for three ARs 11768, 11158 and 12051, that at large latitudinal wavenumbers (corresponding to horizontal scales of around $3000\\,{\\rm km}$), the $f$-mode displays strengthening about two days prior to AR formation and thus provides a new precursor for AR formation. The idea that the $f$-mode is perturbed days before any visible magnetic activity occurs on the surface can be important in constraining dynamo models aiming at understanding the global...

  17. Confined Flares in Solar Active Region 12192 from 2014 October 18 to 29

    E-Print Network [OSTI]

    Chen, Huadong; Ma, Suli; Yang, Shuhong; Li, Leping; Huang, Xin; Xiao, Junmin

    2015-01-01

    Using the observations from the Atmospheric Imaging Assembly (AIA) and Helioseismic and Magnetic Imager (HMI) aboard the Solar Dynamics Observatory (SDO), we investigate six X-class and twenty-nine M-class flares occurring in solar active region (AR) 12192 from October 18 to 29. Among them, thirty (including six X- and twenty-four M-class) flares originated from the AR core and the other five M-flares appeared at the AR periphery. Four of the X-flares exhibited similar flaring structures, indicating they were homologous flares with analogous triggering mechanism. The possible scenario is: photospheric motions of emerged magnetic fluxes lead to shearing of the associated coronal magnetic field, which then yields a tether-cutting favorable configuration. Among the five periphery M-flares, four were associated with jet activities. The HMI vertical magnetic field data show that the photospheric fluxes of opposite magnetic polarities emerged, converged and canceled with each other at the footpoints of the jets bef...

  18. MAGNETIC FIELD TOPOLOGY AND THE THERMAL STRUCTURE OF THE CORONA OVER SOLAR ACTIVE REGIONS

    SciTech Connect (OSTI)

    Schrijver, Carolus J.; DeRosa, Marc L.; Title, Alan M., E-mail: schryver@lmsal.co [Lockheed Martin Advanced Technology Center, Palo Alto, CA 94304 (United States)

    2010-08-20

    Solar extreme ultraviolet (EUV) images of quiescent active-region coronae are characterized by ensembles of bright 1-2 MK loops that fan out from select locations. We investigate the conditions associated with the formation of these persistent, relatively cool, loop fans within and surrounding the otherwise 3-5 MK coronal environment by combining EUV observations of active regions made with TRACE with global source-surface potential-field models based on the full-sphere photospheric field from the assimilation of magnetograms that are obtained by the Michelson Doppler Imager (MDI) on SOHO. We find that in the selected active regions with largely potential-field configurations these fans are associated with (quasi-)separatrix layers (QSLs) within the strong-field regions of magnetic plage. Based on the empirical evidence, we argue that persistent active-region cool-loop fans are primarily related to the pronounced change in connectivity across a QSL to widely separated clusters of magnetic flux, and confirm earlier work that suggested that neither a change in loop length nor in base field strengths across such topological features are of prime importance to the formation of the cool-loop fans. We discuss the hypothesis that a change in the distribution of coronal heating with height may be involved in the phenomenon of relatively cool coronal loop fans in quiescent active regions.

  19. Multi-scale comparative spectral analysis of satellite total solar irradiance measurements from 2003 to 2013 reveals a planetary modulation of solar activity and its non-linear dependence on the 11-year solar cycle

    E-Print Network [OSTI]

    Nicola Scafetta; Richard C. Willson

    2013-11-26

    Herein we adopt a multi-scale dynamical spectral analysis technique to compare and study the dynamical evolution of the harmonic components of the overlapping ACRIMSAT/ACRIM3, SOHO/VIRGO and SORCE/TIM total solar irradiance (TSI) records during 2003.15 to 2013.16 in solar cycles 23 and 24. The three TSI time series present highly correlated patterns. Significant power spectral peaks are common to these records and are observed at the following periods: 0.070 year, 0.097 year, 0.20 year, 0.25 year, 0.30-0.34 year, 0.39 year. Less certain spectral peaks occur at about 0.55 year, 0.60-0.65 year and 0.7-0.9 year. Four main frequency periods at 24.8 days (0.068 year), 27.3 days (0.075 year), at 34-35 days (0.093-0.096 year) and 36-38 days (0.099-0.104 year) characterize the solar rotation cycle. The amplitude of these oscillations, in particular of those with periods larger than 0.5 year, appears to be modulated by the 11-year solar cycle. Similar harmonics have been found in other solar indices. The observed periodicities are found highly coherent with the spring, orbital and synodic periods of Mercury, Venus, Earth and Jupiter. We conclude that solar activity is likely modulated by planetary gravitational and electromagnetic forces acting on the sun. The strength of the sun's response to planetary forcing depends non-linearly on the state of internal solar dynamics: planetary-sun coupling effects are enhanced during solar activity maxima and attenuated during minima.

  20. Solar Energy Technologies Program: Concentrating Solar Power

    SciTech Connect (OSTI)

    2009-10-26

    Fact sheet summarizing the goals and activities of the DOE Solar Energy Technologies Program efforts within its concentrating solar power subprogram.

  1. Contract to coordinate on-going documentation requirements associated with Title X legislation for DOE active-solar activities. Final project technical report

    SciTech Connect (OSTI)

    Not Available

    1982-06-01

    The objectives of this work were to ensure that Title X Active Solar Program reports complied with all guidance regarding length, format, coverage, tone, tables and schedules; provide necessary Conservation and Renewable Energy Office background and back-up material; follow this activity through to its completion in January 1982; assess information requirements associated with on-going documentation of Federal Buildings Program and its predecessors; establish a method for collecting, maintaining and utilizing appropriate program data specifically related to the preparation of report due in June 1982. Work on this project has generally remained on schedule and within budget. DOE-SAN has been instrumental in keeping us on track, by providing timely guidance as needed. Attached are recommendations and methods for documenting solar heat technologies research and the Title X sunset policy, planning, and evaluation long report for Active Solar Heating and Cooling Program.

  2. Directory of Solar Energy Research Activities in the United States: First Edition, May 1980. [1220 projects

    SciTech Connect (OSTI)

    1980-05-01

    Information covering 1220, FY 1978 and FY 1979 solar energy research projects is included. In addition to the title and text of project summaries, the directory contains the following indexes: subject index, investigator index, performing organization index, and supporting organization index. This information was registered with the Smithsonian Science Information Exchange by Federal, State, and other supporting organizations. The project summaries are categorized in the following areas: biomass, ocean energy, wind energy,photovoltaics, photochemical energy conversion, photobiological energy conversion, solar heating and cooling, solar process heat, solar collectors and concentrators, solar thermal electric generation, and other solar energy conversion. (WHK)

  3. SOLAR POLAR X-RAY JETS AND MULTIPLE BRIGHT POINTS: EVIDENCE FOR SYMPATHETIC ACTIVITY

    SciTech Connect (OSTI)

    Pucci, Stefano; Romoli, Marco; Poletto, Giannina; Sterling, Alphonse C.

    2012-02-15

    We present an analysis of X-ray bright points (BPs) and X-ray jets observed by Hinode/X-Ray Telescope on 2007 November 2-4, within the solar northern polar coronal hole. After selecting small subregions that include several BPs, we followed their brightness evolution over a time interval of a few hours, when several jets were observed. We find that most of the jets occurred in close temporal association with brightness maxima in multiple BPs: more precisely, most jets are closely correlated with the brightening of at least two BPs. We suggest that the jets result from magnetic connectivity changes that also induce the BP variability. We surmise that the jets and implied magnetic connectivity we describe are small-scale versions of the active-region-scale phenomenon, whereby flares and eruptions are triggered by interacting bipoles.

  4. Triggering an eruptive flare by emerging flux in a solar active-region complex

    E-Print Network [OSTI]

    Louis, Rohan E; Ravindra, B; Chintzoglou, Georgios

    2015-01-01

    A flare and fast coronal mass ejection originated between solar active regions NOAA 11514 and 11515 on July 1, 2012 in response to flux emergence in front of the leading sunspot of the trailing region 11515. Analyzing the evolution of the photospheric magnetic flux and the coronal structure, we find that the flux emergence triggered the eruption by interaction with overlying flux in a non-standard way. The new flux neither had the opposite orientation nor a location near the polarity inversion line, which are favorable for strong reconnection with the arcade flux under which it emerged. Moreover, its flux content remained significantly smaller than that of the arcade (approximately 40 %). However, a loop system rooted in the trailing active region ran in part under the arcade between the active regions, passing over the site of flux emergence. The reconnection with the emerging flux, leading to a series of jet emissions into the loop system, caused a strong but confined rise of the loop system. This lifted th...

  5. Free Magnetic Energy in Solar Active Regions above the Minimum-Energy Relaxed State

    E-Print Network [OSTI]

    S. Regnier; E. R. Priest

    2008-05-12

    To understand the physics of solar flares, including the local reorganisation of the magnetic field and the acceleration of energetic particles, we have first to estimate the free magnetic energy available for such phenomena, which can be converted into kinetic and thermal energy. The free magnetic energy is the excess energy of a magnetic configuration compared to the minimum-energy state, which is a linear force-free field if the magnetic helicity of the configuration is conserved. We investigate the values of the free magnetic energy estimated from either the excess energy in extrapolated fields or the magnetic virial theorem. For four different active regions, we have reconstructed the nonlinear force-free field and the linear force-free field corresponding to the minimum-energy state. The free magnetic energies are then computed. From the energy budget and the observed magnetic activity in the active region, we conclude that the free energy above the minimum-energy state gives a better estimate and more insights into the flare process than the free energy above the potential field state.

  6. Towards an understanding of light activation processes in titanium oxide based inverted organic solar cells

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    solar cells S. Chambon, E. Destouesse, B. Pavageau, L. Hirsch, and G. Wantz Citation: J. Appl. Phys. 112. Related Articles Power losses in bilayer inverted small molecule organic solar cells Appl. Phys. Lett. 101, 233903 (2012) Thin-film encapsulation of inverted indium-tin-oxide-free polymer solar cells by atomic

  7. Are cold winters in Europe associated with low solar activity? This article has been downloaded from IOPscience. Please scroll down to see the full text article.

    E-Print Network [OSTI]

    Lockwood, Mike

    Are cold winters in Europe associated with low solar activity? This article has been downloaded.1088/1748-9326/5/2/024001 Are cold winters in Europe associated with low solar activity? M Lockwood1,2 , R G Harrison1 , T Woollings1 coincided with more severe winters in the United Kingdom and continental Europe. Motivated by recent

  8. Coronal energy input and dissipation in a solar active region 3D MHD model

    E-Print Network [OSTI]

    Bourdin, Philippe-A; Peter, Hardi

    2015-01-01

    Context. We have conducted a 3D MHD simulation of the solar corona above an active region in full scale and high resolution, which shows coronal loops, and plasma flows within them, similar to observations. Aims. We want to find the connection between the photospheric energy input by field-line braiding with the coronal energy conversion by Ohmic dissipation of induced currents. Methods. To this end we compare the coronal energy input and dissipation within our simulation domain above different fields of view, e.g. for a small loops system in the active region (AR) core. We also choose an ensemble of field lines to compare, e.g., the magnetic energy input to the heating per particle along these field lines. Results. We find an enhanced Ohmic dissipation of currents in the corona above areas that also have enhanced upwards-directed Poynting flux. These regions coincide with the regions where hot coronal loops within the AR core are observed. The coronal density plays a role in estimating the coronal temperatur...

  9. Concentrating Solar Power

    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 concentrating solar power subprogram.

  10. Barriers and incentives to the adoption of innovative, energy-efficient housing: Passive and active solar and earth-sheltered

    SciTech Connect (OSTI)

    Conway, R.J.

    1988-01-01

    The purpose of this study was to determine intermediaries perceptions of barriers and incentives to innovative, energy-efficient housing in Iowa. Data were collected by two surveys. The questionnaire for the first survey collected data from 102 communities. The second questionnaire surveyed housing intermediaries drawn from the 102 communities included in the first survey. The sample consisted of 481 builders, building inspectors, realtors, lenders, and solar suppliers. Intermediary groups differed in their perceptions of barriers and incentives to innovative, energy-efficient housing. Significant differences were found among the intermediaries for whether state-mandated solar standards would reduce the risk of inspection of solar-energy houses and whether risky resale potential acts as a barrier to building solar energy housing. The major barriers were the first costs associated with building active solar and earth-sheltered housing and the lack of skills among subcontractors to build these types. There was not significant relationship between rate of adoption among communities and their location in the state. There was, however, a significant relationship between category of building official and rate of adoption among communities.

  11. Benchmark Test of Differential Emission Measure Codes and Multi-Thermal Energies in Solar Active Regions

    E-Print Network [OSTI]

    Aschwanden, M J; Caspi, A; McTiernan, J M; Ryan, D; Warren, H P

    2015-01-01

    We compare the ability of 11 Differential Emission Measure (DEM) forward-fitting and inversion methods to constrain the properties of active regions and solar flares by simulating synthetic data using the instrumental response functions of SDO/AIA, SDO/EVE, RHESSI, and GOES/XRS. The codes include the single-Gaussian DEM, a bi-Gaussian DEM, a fixed-Gaussian DEM, a linear spline DEM, the spatial synthesis DEM, the Monte-Carlo Markov chain DEM, the regularized DEM inversion, the Hinode/XRT method, a polynomial spline DEM, an EVE+GOES, and an EVE+RHESSI method. Averaging the results from all 11 DEM methods, we find the following accuracies in the inversion of physical parameters: the EM-weighted temperature $T_w^{fit}/T_w^{sim}=0.9\\pm0.1$, the peak emission measure $EM_p^{fit}/EM_p^{sim}=0.6\\pm0.2$, the total emission measure $EM_t^{fit}/EM_t^{sim}=0.8\\pm0.3$, and the multi-thermal energies $E_{th}^{fit}/EM_{th}^{sim}=1.2\\pm0.4$. We find that the AIA spatial synthesis, the EVE+GOES, and the EVE+RHESSI method yiel...

  12. Formation of a Double-decker Magnetic Flux Rope in the Sigmoidal Solar Active Region 11520

    E-Print Network [OSTI]

    Cheng, X; Zhang, J; Sun, X D; Guo, Y; Wang, Y M; Kliem, B; Deng, Y Y

    2014-01-01

    In this paper, we address the formation of a magnetic flux rope (MFR) that erupted on 2012 July 12 and caused a strong geomagnetic storm event on July 15. Through analyzing the long-term evolution of the associated active region observed by the Atmospheric Imaging Assembly and the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory, it is found that the twisted field of an MFR, indicated by a continuous S-shaped sigmoid, is built up from two groups of sheared arcades near the main polarity inversion line half day before the eruption. The temperature within the twisted field and sheared arcades is higher than that of the ambient volume, suggesting that magnetic reconnection most likely works there. The driver behind the reconnection is attributed to shearing and converging motions at magnetic footpoints with velocities in the range of 0.1--0.6 km s$^{-1}$. The rotation of the preceding sunspot also contributes to the MFR buildup. Extrapolated three-dimensional non-linear force-free field s...

  13. Cycles of magnetic activity in solar-type stars. The place of the Sun among the stars with different levels of coronal and chromospheric activity

    E-Print Network [OSTI]

    Bruevich, E A; Shimanovskaya, E V

    2015-01-01

    Activity of the chromospheres and coronas of the stars of late (F, G, K) spectral classes and also their cyclic activity is analyzed on the observational data of solar-type stars from Mount Wilson "HK-project". The chromospheric and coronal activity of "HK-project stars" and the Sun was compared to the stars with active atmospheres observed in Planets Search Programs. It is shown that the cyclic activity begins to occur in stars, close by their spectral type to the Sun and becomes more pronounced at K-stars. The results of a comparative analysis of the characteristics of chromospheric and coronal activity of the Sun and F, G and K-stars are presented.

  14. Separable solutions of force-free spheres and applications to solar active regions

    SciTech Connect (OSTI)

    Prasad, A.; Mangalam, A.; Ravindra, B. E-mail: mangalam@iiap.res.in

    2014-05-10

    We present a systematic study of the force-free field equation for simple axisymmetric configurations in spherical geometry and apply it to the solar active regions. The condition of separability of solutions in the radial and angular variables leads to two classes of solutions: linear and nonlinear force-free fields (NLFF). We have studied these linear solutions and extended the nonlinear solutions for the radial power law index to the irreducible rational form n = p/q, which is allowed for all cases of odd p and cases of q > p for even p, where the poloidal flux ??1/r{sup n} and the field B?1/r {sup n+2}. We apply these solutions to simulate photospheric vector magnetograms obtained using the spectropolarimeter on board Hinode. The effectiveness of our search strategy is first demonstrated on test inputs of dipolar, axisymmetric, and nonaxisymmetric linear force-free fields. Using the best fit, we build three-dimensional axisymmetric field configurations and calculate the energy and relative helicity with two independent methods, which are in agreement. We have analyzed five magnetograms for AR 10930 spanning a period of three days during which two X-class flares occurred and found the free energy and relative helicity of the active region before and after the flare; our analysis indicates a peak in these quantities before the flare events, which is consistent with the other results. We also analyzed single-polarity regions AR 10923 and 10933, which showed very good fits to potential fields. This method provides useful reconstruction of NLFF and input fields for other numerical techniques.

  15. Engineering Design, Construction, Operation and Analysis of the 2007 Texas A&M University Solar Decathlon House 

    E-Print Network [OSTI]

    Ramirez, E. J.

    2008-01-01

    Official Observer Installing a Temperature Sensor Inside the TAMU Dishwasher ....................................................................................................................... 110 Figure 119: TAMU Team Member Removing Cold Water from...

  16. Engineering Design, Construction, Operation and Analysis of the 2007 Texas A&M University Solar Decathlon House 

    E-Print Network [OSTI]

    Ramirez, Eduardo

    2008-06-10

    Official Observer Installing a Temperature Sensor Inside the TAMU Dishwasher ....................................................................................................................... 110 Figure 119: TAMU Team Member Removing Cold Water from...

  17. Indian Solar Cities Programme: An Overview of Major Activities and Accomplishments; Preprint

    SciTech Connect (OSTI)

    Kandt, A.

    2012-05-01

    This paper details the Indian Solar City Programme, provides an overview of one city's Master Plan and implementation progress, describes NREL's support of the Indian Solar City Programme, and outlines synergies and differences between the Indian and American programs including unique challenges and opportunities India is facing.

  18. On the response of polar cap dynamics to its solar wind and magnetotail drivers at high levels of geomagnetic activity

    E-Print Network [OSTI]

    Gao, Ye

    2012-01-01

    nearly universal solar wind-magnetosphere coupling functionits controlling factors in solar wind and magnetotail, J.on its controlling factors in solar wind and magnetotail, J.

  19. On the response of polar cap dynamics to its solar wind and magnetotail drivers at high levels of geomagnetic activity

    E-Print Network [OSTI]

    Gao, Ye

    2012-01-01

    of polar cap potential by intense solar wind electricelectric potential as a function of solar wind parameters bypolar cap potential increases linearly with the solar wind

  20. On the potential value of Ca II K spectroheliogram time-series for solar activity and irradiance studies

    E-Print Network [OSTI]

    I. Ermolli; S. K. Solanki; A. G. Tlatov; N. A. Krivova; R. K. Ulrich; J. Singh

    2008-02-26

    Various observatories around the globe started regular full-disk imaging of the solar atmosphere in the Ca II K line since the early decades of the 20th century. The archives made by these observations have the potential of providing far more detailed information on solar magnetism than just the sunspot number and area records to which most studies of solar activity and irradiance changes are restricted. We evaluate the image contents of three Ca II K spectroheliogram time-series, specifically those obtained by the digitization of the Arcetri, Kodaikanal, and Mt Wilson photographic archives. We describe the main problems afflicting these data and analyze their quality by expressing the image contents through several quantities. We compare the results obtained with those for similar present-day observations taken with the Meudon spectroheliograph and with the Rome-PSPT. We show that historic data suffer from stronger geometrical distortions and photometric uncertainties than similar present-day observations. The latter uncertainties mostly originate from the photographic calibration of the original data and from stray-light effects. We also show that the image contents of the three analyzed series vary in time. These variations are probably due to instrument changes and aging of the spectrographs used, as well as changes of the observing programs. Our results imply that the main challenge for the analysis of historic data is their accurate photometric calibration. This problem must be solved before they can provide reliable information about solar magnetism and activity over the last century. Moreover, inter-calibration of results obtained from independent time-series is required to reliably trace changes of solar properties with time from the analysis of such data.

  1. EMERGING DIMMINGS OF ACTIVE REGIONS OBSERVED BY THE SOLAR DYNAMICS OBSERVATORY

    SciTech Connect (OSTI)

    Zhang Jun; Yang Shuhong [Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 (China); Liu Yang; Sun Xudong, E-mail: zjun@nao.cas.cn, E-mail: shuhongyang@nao.cas.cn, E-mail: yliu@sun.stanford.edu, E-mail: xudong@sun.stanford.edu [W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305-4085 (United States)

    2012-12-01

    Using the observations from the Atmospheric Imaging Assembly and the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory, we statistically investigate the emerging dimmings (EDs) of 24 isolated active regions (IARs) from 2010 June to 2011 May. All the IARs show EDs in lower-temperature lines (e.g., 171 A) at their early emerging stages. Meanwhile, in higher temperature lines (e.g., 211 A), the ED regions brighten continuously. There are two types of EDs: fan-shaped and halo-shaped. There are 19 fan-shaped EDs and 5 halo-shaped ones. The EDs appear to be delayed by several to more than ten hours relative to the first emergence of the IARs. The shortest delay is 3.6 hr and the longest is 19.0 hr. The EDs last from 3.3 hr to 14.2 hr, with a mean duration of 8.3 hr. Before the appearance of the EDs, the emergence rate of the magnetic flux of the IARs is between 1.2 Multiplication-Sign 10{sup 19} Mx hr{sup -1} to 1.4 Multiplication-Sign 10{sup 20} Mx hr{sup -1}. The larger the emergence rate is, the shorter the delay time is. While the dimmings appear, the magnetic flux of the IARs ranges from 8.8 Multiplication-Sign 10{sup 19} Mx to 1.3 Multiplication-Sign 10{sup 21} Mx. These observations imply that the reconfiguration of the coronal magnetic fields due to reconnection between the newly emerging flux and the surrounding existing fields results in a new thermal distribution which leads to a dimming for the cooler channel (171 A) and brightening in the warmer channels.

  2. THE NAKED EMERGENCE OF SOLAR ACTIVE REGIONS OBSERVED WITH SDO/HMI

    SciTech Connect (OSTI)

    Centeno, Rebecca

    2012-11-01

    We take advantage of the HMI/SDO instrument to study the naked emergence of active regions (ARs) from the first imprints of the magnetic field on the solar surface. To this end, we followed the first 24 hr in the life of two rather isolated ARs that appeared on the surface when they were about to cross the central meridian. We analyze the correlations between Doppler velocities and the orientation of the vector magnetic field, consistent finding that the horizontal fields connecting the main polarities are dragged to the surface by relatively strong upflows and are associated with elongated granulation that is, on average, brighter than its surroundings. The main magnetic footpoints, on the other hand, are dominated by vertical fields and downflowing plasma. The appearance of moving dipolar features (MDFs, of opposite polarity to that of the AR) in between the main footpoints is a rather common occurrence once the AR reaches a certain size. The buoyancy of the fields is insufficient to lift up the magnetic arcade as a whole. Instead, weighted by the plasma that it carries, the field is pinned down to the photosphere at several places in between the main footpoints, giving life to the MDFs and enabling channels of downflowing plasma. MDF poles tend to drift toward each other, merge and disappear. This is likely to be the signature of a reconnection process in the dipped field lines, which relieves some of the weight allowing the magnetic arcade to finally rise beyond the detection layer of the Helioseismic and Magnetic Imager spectral line.

  3. The Pierre Auger Observatory scaler mode for the study of solar activity modulation of galactic cosmic rays

    SciTech Connect (OSTI)

    Abreu, P.; Aglietta, M.; Ahn, E.J.; Allard, D.; Allekotte, I.; Allen, J.; Alvarez Castillo, J.; Alvarez-Muniz, J.; Ambrosio, M.; Aminaei, A.; Anchordoqui, L.; /Wisconsin U., Milwaukee /Lisbon, LIFEP /Lisbon, IST

    2011-01-01

    Since data-taking began in January 2004, the Pierre Auger Observatory has been recording the count rates of low energy secondary cosmic ray particles for the self-calibration of the ground detectors of its surface detector array. After correcting for atmospheric effects, modulations of galactic cosmic rays due to solar activity and transient events are observed. Temporal variations related with the activity of the heliosphere can be determined with high accuracy due to the high total count rates. In this study, the available data are presented together with an analysis focused on the observation of Forbush decreases, where a strong correlation with neutron monitor data is found.

  4. Study of Adsorption of Methanol in an Activated Carbon and Carbon Nanotube Matrix for Use in a Solar Based Refrigeration Cycle 

    E-Print Network [OSTI]

    Sambath, Srivaths

    2012-07-16

    This thesis seeks to investigate the adsorption capabilities of activated carbon and carbon nanotubes. The adsorption of methanol on both of these substances was tested for their application in a solar based refrigeration ...

  5. Virginia Tech Shines Light on Home Efficiency

    Broader source: Energy.gov [DOE]

    Collegiate teams from around the world came to Madrid this month to present their solar-powered houses in the first biennial Solar Decathlon Europe, a competition modeled after the Energy Department's Solar Decathlon in Washington, D.C.

  6. A solar active region loop compared with a 2D MHD model

    E-Print Network [OSTI]

    Gontikakis, C; Dara, H C; Tsinganos, K

    2005-01-01

    We analyzed a coronal loop observed with the Normal Incidence Spectrometer (NIS), which is part of the Coronal Diagnostic Spectrometer (CDS) on board the Solar and Heliospheric Observatory (SOHO). The measured Doppler shifts and proper motions along the selected loop strongly indicate unidirectional flows. Analysing the Emission Measure Curves of the observed spectral lines, we estimated that the temperature along the loop was about 380000 K. We adapted a solution of the ideal MHD steady equations to our set of measurements. The derived energy balance along the loop, as well as the advantages/disadvantages of this MHD model for understanding the characteristics of solar coronal loops are discussed.

  7. A solar active region loop compared with a 2D MHD model

    E-Print Network [OSTI]

    C. Gontikakis; G. J. D. Petrie; H. C. Dara; K. Tsinganos

    2005-03-31

    We analyzed a coronal loop observed with the Normal Incidence Spectrometer (NIS), which is part of the Coronal Diagnostic Spectrometer (CDS) on board the Solar and Heliospheric Observatory (SOHO). The measured Doppler shifts and proper motions along the selected loop strongly indicate unidirectional flows. Analysing the Emission Measure Curves of the observed spectral lines, we estimated that the temperature along the loop was about 380000 K. We adapted a solution of the ideal MHD steady equations to our set of measurements. The derived energy balance along the loop, as well as the advantages/disadvantages of this MHD model for understanding the characteristics of solar coronal loops are discussed.

  8. 9,400 years of cosmic radiation and solar activity from ice cores and tree rings

    E-Print Network [OSTI]

    Fischer, Hubertus

    . Ionization chambers and neutron monitors have directly monitored the intensity of cosmic radiation since be considered as a kind of a "natural neutron monitor," can be used as a proxy for cosmic radiation (2 system during supernova explo- sions. Mainly two magnetic shields, the solar magnetic field

  9. Indian Solar Cities Programme: An Overview of Major Activities and Accomplishments (Presentation)

    SciTech Connect (OSTI)

    Kandt, A.

    2012-05-01

    Indian Solar Cities Programme supports 60 Indian cities in the development of EE and RE projects. Aims to reduce conventional energy demand by 10% by 2013, compared to a baseline year of 2008, and support is provided to municipal corporations for preparing and implementing a master plan.

  10. PRODUCTIVITY OF SOLAR FLARES AND MAGNETIC HELICITY INJECTION IN ACTIVE REGIONS

    E-Print Network [OSTI]

    effect on cell phones and the global positioning system and heat up the terrestrial atmosphere within). Solar flares produce high energy particles, radiation, and erupting magnetic structures that are related to geomagnetic storms. Their strong electro- magnetic radiations from radio waves to gamma-rays have direct

  11. Magnetic Energy and Helicity Budgets in the Active-Region Solar Corona. I. Linear Force-Free Approximation

    E-Print Network [OSTI]

    M. K. Georgoulis; Barry J. LaBonte

    2007-06-27

    We self-consistently derive the magnetic energy and relative magnetic helicity budgets of a three-dimensional linear force-free magnetic structure rooted in a lower boundary plane. For the potential magnetic energy we derive a general expression that gives results practically equivalent to those of the magnetic Virial theorem. All magnetic energy and helicity budgets are formulated in terms of surface integrals applied to the lower boundary, thus avoiding computationally intensive three-dimensional magnetic field extrapolations. We analytically and numerically connect our derivations with classical expressions for the magnetic energy and helicity, thus presenting a so-far lacking unified treatment of the energy/helicity budgets in the constant-alpha approximation. Applying our derivations to photospheric vector magnetograms of an eruptive and a noneruptive solar active regions, we find that the most profound quantitative difference between these regions lies in the estimated free magnetic energy and relative magnetic helicity budgets. If this result is verified with a large number of active regions, it will advance our understanding of solar eruptive phenomena. We also find that the constant-alpha approximation gives rise to large uncertainties in the calculation of the free magnetic energy and the relative magnetic helicity. Therefore, care must be exercised when this approximation is applied to photospheric magnetic field observations. Despite its shortcomings, the constant-alpha approximation is adopted here because this study will form the basis of a comprehensive nonlinear force-free description of the energetics and helicity in the active-region solar corona, which is our ultimate objective.

  12. Concentrating Solar Power: Solar Energy Technologies Program (SETP) (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-10-01

    Fact sheet summarizing the goals and activities of the DOE Solar Energy Technologies Program efforts within its concentrating solar power subprogram.

  13. On the response of polar cap dynamics to its solar wind and magnetotail drivers at high levels of geomagnetic activity

    E-Print Network [OSTI]

    Gao, Ye

    2012-01-01

    Energy partition in two solar flare/CME events, J. Geophys.deduced from impulsive solar flare particles, Astrophys.presented at The Physics of Solar Flares, Proceedings of the

  14. Federal Solar Activities and Policies: Update on Strategic Areas of Focus

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: AlternativeCommunication3-EDepartmentExerciseCarbon4 LDRDFebruaryFacilitiesMarch 6, 2012.Solar

  15. Pervasive faint Fe XIX emission from a solar active region observed with EUNIS-13: Evidence for nanoflare heating

    SciTech Connect (OSTI)

    Brosius, Jeffrey W.; Daw, Adrian N.; Rabin, D. M.

    2014-08-01

    We present spatially resolved EUV spectroscopic measurements of pervasive, faint Fe XIX 592.2 Å line emission in an active region observed during the 2013 April 23 flight of the Extreme Ultraviolet Normal Incidence Spectrograph (EUNIS-13) sounding rocket instrument. With cooled detectors, high sensitivity, and high spectral resolution, EUNIS-13 resolves the lines of Fe XIX at 592.2 Å (formed at temperature T ? 8.9 MK) and Fe XII at 592.6 Å (T ? 1.6 MK). The Fe XIX line emission, observed over an area in excess of 4920 arcsec{sup 2} (2.58 × 10{sup 9} km{sup 2}, more than 60% of the active region), provides strong evidence for the nanoflare heating model of the solar corona. No GOES events occurred in the region less than 2 hr before the rocket flight, but a microflare was observed north and east of the region with RHESSI and EUNIS during the flight. The absence of significant upward velocities anywhere in the region, particularly the microflare, indicates that the pervasive Fe XIX emission is not propelled outward from the microflare site, but is most likely attributed to localized heating (not necessarily due to reconnection) consistent with the nanoflare heating model of the solar corona. Assuming ionization equilibrium we estimate Fe XIX/Fe XII emission measure ratios of ?0.076 just outside the AR core and ?0.59 in the core.

  16. Constraining Hot Plasma in a Non-flaring Solar Active Region with FOXSI Hard X-ray Observations

    E-Print Network [OSTI]

    Ishikawa, Shin-nosuke; Christe, Steven; Ishibashi, Kazunori; Brooks, David H; Williams, David R; Shimojo, Masumi; Sako, Nobuharu; Krucker, Sam

    2015-01-01

    We present new constraints on the high-temperature emission measure of a non-flaring solar active region using observations from the recently flown Focusing Optics X-ray Solar Imager sounding rocket payload. FOXSI has performed the first focused hard X-ray (HXR) observation of the Sun in its first successful flight on 2012 November 2. Focusing optics, combined with small strip detectors, enable high-sensitivity observations with respect to previous indirect imagers. This capability, along with the sensitivity of the HXR regime to high-temperature emission, offers the potential to better characterize high-temperature plasma in the corona as predicted by nanoflare heating models. We present a joint analysis of the differential emission measure (DEM) of active region 11602 using coordinated observations by FOXSI, Hinode/XRT and Hinode/EIS. The Hinode-derived DEM predicts significant emission measure between 1 MK and 3 MK, with a peak in the DEM predicted at 2.0-2.5 MK. The combined XRT and EIS DEM also shows emi...

  17. University of California, Davis, and Mass/Central America Win...

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

    at the U.S. Department of Energy Solar Decathlon are available today and can help anyone save money by saving energy at home," said Richard King, Director of the Solar Decathlon...

  18. Sandia Energy - Solar CSP R&D Activities at Sandia

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II)GeothermalFuel Magnetization and Laser(TSPEAR &Solar Home

  19. THE LIMIT OF MAGNETIC-SHEAR ENERGY IN SOLAR ACTIVE REGIONS

    SciTech Connect (OSTI)

    Moore, Ronald L.; Falconer, David A.; Sterling, Alphonse C.

    2012-05-01

    It has been found previously, by measuring from active-region magnetograms a proxy of the free energy in the active region's magnetic field, (1) that there is a sharp upper limit to the free energy the field can hold that increases with the amount of magnetic field in the active region, the active region's magnetic flux content, and (2) that most active regions are near this limit when their field explodes in a coronal mass ejection/flare eruption. That is, explosive active regions are concentrated in a main-sequence path bordering the free-energy-limit line in (flux content, free-energy proxy) phase space. Here, we present evidence that specifies the underlying magnetic condition that gives rise to the free-energy limit and the accompanying main sequence of explosive active regions. Using a suitable free-energy proxy measured from vector magnetograms of 44 active regions, we find evidence that (1) in active regions at and near their free-energy limit, the ratio of magnetic-shear free energy to the non-free magnetic energy the potential field would have is of the order of one in the core field, the field rooted along the neutral line, and (2) this ratio is progressively less in active regions progressively farther below their free-energy limit. Evidently, most active regions in which this core-field energy ratio is much less than one cannot be triggered to explode; as this ratio approaches one, most active regions become capable of exploding; and when this ratio is one, most active regions are compelled to explode.

  20. Efficient methylammonium lead iodide perovskite solar cells with active layers from 300 to 900 nm

    SciTech Connect (OSTI)

    Momblona, C.; Malinkiewicz, O.; Soriano, A.; Gil-Escrig, L.; Bandiello, E.; Scheepers, M.; Bolink, H. J.; Edri, E.

    2014-08-01

    Efficient methylammonium lead iodide perovskite-based solar cells have been prepared in which the perovskite layer is sandwiched in between two organic charge transporting layers that block holes and electrons, respectively. This configuration leads to stable and reproducible devices that do not suffer from strong hysteresis effects and when optimized lead to efficiencies close to 15%. The perovskite layer is formed by using a dual-source thermal evaporation method, whereas the organic layers are processed from solution. The dual-source thermal evaporation method leads to smooth films and allows for high precision thickness variations. Devices were prepared with perovskite layer thicknesses ranging from 160 to 900 nm. The short-circuit current observed for these devices increased with increasing perovskite layer thickness. The main parameter that decreases with increasing perovskite layer thickness is the fill factor and as a result optimum device performance is obtained for perovskite layer thickness around 300 nm. However, here we demonstrate that with a slightly oxidized electron blocking layer the fill factor for the solar cells with a perovskite layer thickness of 900 nm increases to the same values as for the devices with thin perovskite layers. As a result the power conversion efficiencies for the cells with 300 and 900 nm are very similar, 12.7% and 12%, respectively.

  1. 1.Physics Department, Colorado School of Mines, Golden, CO 2. National Renewable Energy Laboratory, Golden, CO 3. United Solar Ovonic, LLC Troy, MI, United States THERMAL ACTIVATION OF DEEP OXYGEN DEFECT FORMATION AND HYDROGEN EFFUSION

    E-Print Network [OSTI]

    1.Physics Department, Colorado School of Mines, Golden, CO 2. National Renewable Energy Laboratory, Golden, CO 3. United Solar Ovonic, LLC Troy, MI, United States BACKGROUND THERMAL ACTIVATION OF DEEP was partially supported by a DOE grant through United Solar Ovonics, Inc., under the Solar America Initiative

  2. The University of Maryland Energy Research Center

    E-Print Network [OSTI]

    Rubloff, Gary W.

    .S. ranking in the 2007 DOE Solar Decathlon. The university's campus is a living laboratory of "smartgrid

  3. Structure and Stability of Magnetic Fields in Solar Active Region12192 Based on Nonlinear Force-Free Field Modeling

    E-Print Network [OSTI]

    Inoue, S; Kusano, K

    2016-01-01

    We analyze a three-dimensional (3D) magnetic structure and its stability in large solar active region(AR) 12192, using the 3D coronal magnetic field constructed under a nonlinear force-free field (NLFFF) approximation. In particular, we focus on the magnetic structure that produced an X3.1-class flare which is one of the X-class flares observed in AR 12192. According to our analysis, the AR contains multiple-flux-tube system, {\\it e.g.}, a large flux tube, both of whose footpoints are anchored to the large bipole field, under which other tubes exist close to a polarity inversion line (PIL). These various flux tubes of different sizes and shapes coexist there. In particular, the later are embedded along the PIL, which produces a favorable shape for the tether-cutting reconnection and is related to the X-class solar flare. We further found that most of magnetic twists are not released even after the flare, which is consistent with the fact that no observational evidence for major eruptions was found. On the oth...

  4. THE KINEMATICS AND PLASMA PROPERTIES OF A SOLAR SURGE TRIGGERED BY CHROMOSPHERIC ACTIVITY IN AR11271

    SciTech Connect (OSTI)

    Kayshap, P.; Srivastava, Abhishek K. [Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263 129 (India)] [Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263 129 (India); Murawski, K., E-mail: kmur@kft.umcs.lublin.pl [Group of Astrophysics, UMCS, ul. Radziszewskiego 10, 20-031 Lublin (Poland)

    2013-01-20

    We observe a solar surge in NOAA AR11271 using the Solar Dynamics Observatory (SDO) Atmospheric Imaging Assembly 304 A image data on 2011 August 25. The surge rises vertically from its origin up to a height of Almost-Equal-To 65 Mm with a terminal velocity of Almost-Equal-To 100 km s{sup -1}, and thereafter falls and fades gradually. The total lifetime of the surge was Almost-Equal-To 20 minutes. We also measure the temperature and density distribution of the observed surge during its maximum rise and find an average temperature and a density of 2.0 MK and 4.1 Multiplication-Sign 10{sup 9} cm{sup -3}, respectively. The temperature map shows the expansion and mixing of cool plasma lagging behind the hot coronal plasma along the surge. Because SDO/HMI temporal image data do not show any detectable evidence of significant photospheric magnetic field cancellation for the formation of the observed surge, we infer that it is probably driven by magnetic-reconnection-generated thermal energy in the lower chromosphere. The radiance (and thus the mass density) oscillations near the base of the surge are also evident, which may be the most likely signature of its formation by a reconnection-generated pulse. In support of the present observational baseline of the triggering of the surge due to chromospheric heating, we devise a numerical model with conceivable implementation of the VAL-C atmosphere and a thermal pulse as an initial trigger. We find that the pulse steepens into a slow shock at higher altitudes which triggers plasma perturbations exhibiting the observed features of the surge, e.g., terminal velocity, height, width, lifetime, and heated fine structures near its base.

  5. Solar Design Workbook

    SciTech Connect (OSTI)

    Franta, G.; Baylin, F.; Crowther, R.; Dubin, F.; Grace, A., Griffith, J.W.; Holtz, M.; Kutscher, C.; Nordham, D.; Selkowitz, S.; Villecco, M.

    1981-06-01

    This Solar Design Workbook presents solar building design applications for commercial buildir^s. The book is divided into four sections. The first section describes the variety of solar applications in buildings including conservation aspects, solar fundamentals, passive systems, active systems, daylighting, and other solar options. Solar system design evaluation techniques including considerations for building energy requirements, passive systems, active systems, and economics are presented in Section II. The third section attempts to assist the designer in the building design process for energy conservation and solar applications including options and considerations for pre-design, design, and post-design phases. The information required for the solar design proee^ has not been fully developed at this time. Therefore, Section III is incomplete, but an overview of the considerations with some of the design proces elements is presented. Section IV illustrates ease studies that utilize solar applications in the building design.

  6. Solar Energy Program: Chapter from the Energy and Environmental Division Annual Report 1980

    E-Print Network [OSTI]

    Energy and Environment Division

    1981-01-01

    SOLAR ENERGY PROGRAM PERSONNEL Small Particle SuspensionsStrategies for Active Solar Energy Systems M. Warren, S.tary for Conservation and Solar Energy, Office of Solar

  7. Solar collection

    SciTech Connect (OSTI)

    Cole, S.L.

    1984-08-01

    This report contains summaries and pictures of projects funded by the Appropriate Technology Small Grants Program which include the following solar technologies: solar dish; photovoltaics; passive solar building and solar hot water system; Trombe wall; hot air panel; hybrid solar heating system; solar grain dryer; solar greenhouse; solar hot water workshops; and solar workshops.

  8. DYNAMO EFFECTS NEAR THE TRANSITION FROM SOLAR TO ANTI-SOLAR DIFFERENTIAL ROTATION

    E-Print Network [OSTI]

    Simitev, RD; Kosovichev, AG; Busse, FH

    2015-01-01

    Symp. 71, Basic Mechanisms of Solar Activity, ed. V. Bumba &N. 2013a, in IAU Symp. 294, Solar and Astrophysical DynamosNEAR THE TRANSITION FROM SOLAR TO ANTI-SOLAR DIFFERENTIAL

  9. Efficiency Enhancement in Organic Solar Cells by Incorporating Silica-coated Gold Nanorods at the Buffer/Active interface

    E-Print Network [OSTI]

    Zhao, Haoyang; Tong, Peiqian; Cui, Yanxia; Hao, Yuying; Sun, Qinjun; Shi, Fang; Zhan, Qiuqiang; Wang, Hua; Zhu, Furong

    2015-01-01

    The performance of organic solar cells (OSCs) can be greatly improved by incorporating silica-coated gold nanorods (Au@SiO2 NRs) at the interface between the hole transporting layer and the active layer due to the plasmonic effect. The silica shell impedes the aggregation effect of the Au NRs in ethanol solution as well as the server charge recombination on the surface of the Au NRs otherwise they would bring forward serious reduction in open circuit voltage when incorporating the Au NRs at the positions in contact with the active materials. As a result, while the high open circuit voltage being maintained, the optimized plasmonic OSCs possess an increased short circuit current, and correspondingly an elevated power conversion efficiency with the enhancement factor of ~11%. The origin of performance improvement in OSCs with the Au@SiO2 NRs was analyzed systematically using morphological, electrical, optical characterizations along with theoretical simulation. It is found that the broadband enhancement in abso...

  10. In situ monitoring of structure formation in the active layer of polymer solar cells during roll-to-roll coating

    SciTech Connect (OSTI)

    Rossander, Lea H.; Zawacka, Natalia K.; Dam, Henrik F.; Krebs, Frederik C.; Andreasen, Jens W.

    2014-08-15

    The active layer crystallization during roll-to-roll coating of organic solar cells is studied in situ. We developed an X-ray setup where the coater unit is an integrated part of the small angle X-ray scattering instrument, making it possible to control the coating process while recording scattering measurements in situ, enabling us to follow the crystal formation during drying. By varying the distance between the coating head and the point where the X-ray beam hits the film, we obtained measurements of 4 different stages of drying. For each of those stages, the scattering from as long a foil as possible is summed together, with the distance from coating head to scattering point kept constant. The results are average crystallographic properties for the active layer coated on a 30 m long foil. With this insight into the dynamics of crystallization in a roll-coated polymer film, we find that the formation of textured and untextured crystallites seems uncorrelated, and happens at widely different rates. Untextured P3HT crystallites form later in the drying process than expected which may explain previous studies speculating that untextured crystallization depends on concentration. Textured crystallites, however, begin forming much earlier and steadily increases as the film dries, showing a development similar to other in situ studies of these materials.

  11. Energy Transfer via Solar Wind Driven Ultra Low Frequency Waves in the Earth's Magnetosphere

    E-Print Network [OSTI]

    Hartinger, Michael David

    2012-01-01

    Modeling energy transfer via solar wind driven ULFthrough which solar wind energy can drive wave activity. Inthrough which solar wind energy can drive wave activity. In

  12. A Comparison Study of a Solar Active-Region Eruptive Filament and a Neighboring Non-Eruptive Filament

    E-Print Network [OSTI]

    Jiang, Chaowei; Feng, Xueshang; Hu, Qiang

    2015-01-01

    Solar active region (AR) 11283 is a very magnetically complex region and it has produced many eruptions. However, there exists a non-eruptive filament in the plage region just next to an eruptive one in the AR, which gives us an opportunity to perform a comparison analysis of these two filaments. The coronal magnetic field extrapolated using a CESE-MHD-NLFFF code (Jiang & Feng 2013) reveals that two magnetic flux ropes (MFRs) exist in the same extrapolation box supporting these two filaments, respectively. Analysis of the magnetic field shows that the eruptive MFR contains a bald-patch separatrix surface (BPSS) co-spatial very well with a pre-eruptive EUV sigmoid, which is consistent with the BPSS model for coronal sigmoids. The magnetic dips of the non-eruptive MFRs match H{\\alpha} observation of the non-eruptive filament strikingly well, which strongly supports the MFR-dip model for filaments. Compared with the non-eruptive MFR/filament (with a length of about 200 Mm), the eruptive MFR/filament is much ...

  13. Solar ALMA: Observation-Based Simulations of the mm and sub-mm Emissions from Active Regions

    E-Print Network [OSTI]

    Fleishman, Gregory; Nita, Gelu

    2015-01-01

    We developed an efficient algorithm integrated in our 3D modeling tool, GX Simulator (Nita et al. 2015), allowing quick computation of the synthetic intensity and polarization maps of solar active regions (AR) in the ALMA spectral range. The algorithm analyzes the photospheric input (white light and magnetogram) to classify a given photospheric pixel to belong to a given photospheric structure. Then, a 1D chromospheric model (Fontenla et al. 2009) is added on top of each pixel, which forms a chromospheric model of the AR. Next step is computation of the mm and sub-mm emission produced from this chromosphere model. A huge advantage of this approach is that emission from any given AR can be synthesized very fast, on the order of a few minutes after the AR selection. Using the GX Simulator tool it is also possible to produce synthetic maps of the microwave (gyroresonance) and EUV emission from the same AR model and compare them with the ALMA synthetic maps and with the corresponding observed microwave and/or EUV...

  14. On the relationship between photospheric footpoint motions and coronal heating in solar active regions

    SciTech Connect (OSTI)

    Van Ballegooijen, A. A.; Asgari-Targhi, M.; Berger, M. A.

    2014-05-20

    Coronal heating theories can be classified as either direct current (DC) or alternating current (AC) mechanisms, depending on whether the coronal magnetic field responds quasi-statically or dynamically to the photospheric footpoint motions. In this paper we investigate whether photospheric footpoint motions with velocities of 1-2 km s{sup –1} can heat the corona in active regions, and whether the corona responds quasi-statically or dynamically to such motions (DC versus AC heating). We construct three-dimensional magnetohydrodynamic models for the Alfvén waves and quasi-static perturbations generated within a coronal loop. We find that in models where the effects of the lower atmosphere are neglected, the corona responds quasi-statically to the footpoint motions (DC heating), but the energy flux into the corona is too low compared to observational requirements. In more realistic models that include the lower atmosphere, the corona responds more dynamically to the footpoint motions (AC heating) and the predicted heating rates due to Alfvén wave turbulence are sufficient to explain the observed hot loops. The higher heating rates are due to the amplification of Alfvén waves in the lower atmosphere. We conclude that magnetic braiding is a highly dynamic process.

  15. DOE Solar Training and Education for Professionals

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) Solar Training and Education for Professionals (STEP) funding opportunity will support many activities in solar training and education.

  16. Concentrating Solar Power (Revised) (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-11-01

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

  17. Study of Device Physics and Active Layer Morphology in Polymer-Fullerene Based Solar Cells: The Role of Vertical Phase Segregation and Organic/Metal Interface

    E-Print Network [OSTI]

    Zhang, Guangye

    2015-01-01

    Charge Carrier Mobility and Solar Cell Performance. Org.Solution-Processed Polymer Solar Cells Based on CrosslinkedProcessed “Bilayer” Organic Solar Cells. Adv. Mater. 2011,

  18. From GHz to mHz: A Multiwavelength Study of the Acoustically Active 14 August 2004 M7.4 Solar Flare

    E-Print Network [OSTI]

    J. C. Martinez-Oliveros; H. Moradi; D. Besliu-Ionescu; A. -C Donea; P. S. Cally; C. Lindsey

    2007-07-13

    We carried out an electromagnetic acoustic analysis of the solar flare of 14 August 2004 in active region AR10656 from the radio to the hard X-ray spectrum. The flare was a GOES soft X-ray class M7.4 and produced a detectable sun quake, confirming earlier inferences that relatively low-energy flares may be able to generate sun quakes. We introduce the hypothesis that the seismicity of the active region is closely related to the heights of coronal magnetic loops that conduct high-energy particles from the flare. In the case of relatively short magnetic loops, chromospheric evaporation populates the loop interior with ionized gas relatively rapidly, expediting the scattering of remaining trapped high-energy electrons into the magnetic loss cone and their rapid precipitation into the chromosphere. This increases both the intensity and suddenness of the chromospheric heating, satisfying the basic conditions for an acoustic emission that penetrates into the solar interior.

  19. Solar America Cities Awards: Solar America Initiative Fact Sheet

    SciTech Connect (OSTI)

    Not Available

    2008-03-01

    This fact sheet provides an overview of the Solar America Cities activities within the Solar America Initiative and lists the 25 cities that have received financial awards from the U.S. Department of Energy.

  20. 2010 Solar Program Peer Review Report: An Independent Evaluation of Program Activities for FY2009 and FY2010

    SciTech Connect (OSTI)

    DOE Solar Energy Technologies Program

    2010-12-01

    This document summarizes the recommendations and evaluations provided by an independent external panel of experts at the DOE Solar Energy Technologies Program's 2010 Program Review meeting, held on May 24?27, 2010, in Washington, D.C.

  1. A Century of Solar Ca ii Measurements and Their Implication for Solar UV Driving of Climate

    E-Print Network [OSTI]

    2009-01-01

    solar activity indices such as sunspot number and the 10.7-cm microwave ?solar irradiance extending earlier than the beginning of the 10.7-cm microwave ?

  2. Energy Department Assistant Secretary Danielson Honors Stevens...

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

    contests may be found at www.SolarDecathlon.gov. "This prestigious competition to build energy-efficient solar-powered homes helps students prepare for successful careers...

  3. Efficient solar cooling: first ever non-tracking solar collectors powering a double effect absorption chiller

    E-Print Network [OSTI]

    Poiry, Heather Marie

    2011-01-01

    Ari Rabl, “Active Solar Collectors and Their Applications,”A. and Winston, R. (1980) “Solar collectors for low anda standard flat plate solar collector, and to the right is a

  4. Sandia Energy - Past Market Transformation Activities

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

    Past Market Transformation Activities Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Market Transformation Past Market Transformation...

  5. SATELLITE MEASUREMENTS OF MIDDLE ATMOSPHERIC IMPACTS BY SOLAR PROTON EVENTS IN SOLAR CYCLE 23

    E-Print Network [OSTI]

    Jackman, Charles H.

    SATELLITE MEASUREMENTS OF MIDDLE ATMOSPHERIC IMPACTS BY SOLAR PROTON EVENTS IN SOLAR CYCLE 23 C. H) Abstract. Solar cycle 23 was extremely active with seven of the largest twelve solar proton events (SPEs for several months past the solar events in the winter polar regions because of the enhanced NOy. Keywords

  6. Solar Energy Technologies Program: Market Transformation

    SciTech Connect (OSTI)

    2009-10-26

    Fact sheet summarizing the goals and activities of the DOE Solar Energy Technologies Program efforts within its market transformation subprogram

  7. Solar Energy Program: Chapter from the Energy and Environmental Division Annual Report 1980

    E-Print Network [OSTI]

    Energy and Environment Division

    1981-01-01

    SOLAR ENERGY PROGRAM PERSONNEL Small Particle SuspensionsStrategies for Active Solar Energy Systems M. Warren, S.M. Wahlig, and S Kanzler. SOLAR ENERGY PROGRAM PERSONNEL

  8. Solar Energy Program: Chapter from the Energy and Environmental Division Annual Report 1980

    E-Print Network [OSTI]

    Energy and Environment Division

    1981-01-01

    SOLAR ENERGY PROGRAM PERSONNEL Small Particle SuspensionsStrategies for Active Solar Energy Systems M. Warren, S.tary for Conservation and Solar Energy, Office of Advanced

  9. SOLAR ENERGY PROGRAM: CHAPTER FROM THE ENERGY AND ENVIRONMENT ANNUAL REPORT 1979

    E-Print Network [OSTI]

    Authors, Various

    2010-01-01

    Suspensions for Solar Energy Collection A. Hunt . . .Strategies for Active Solar Energy Systems M. Warren, S.Sandia Laboratories and Solar Energy Research Institute (

  10. Solar Energy Program: Chapter from the Energy and Environmental Division Annual Report 1980

    E-Print Network [OSTI]

    Energy and Environment Division

    1981-01-01

    SOLAR ENERGY PROGRAM PERSONNEL Small Particle SuspensionsStrategies for Active Solar Energy Systems M. Warren, S.ENVIRONMENT DIVISION I SOLAR ENERGY PROGRAM Chapter from t h

  11. SOLAR ENERGY PROGRAM: CHAPTER FROM THE ENERGY AND ENVIRONMENT ANNUAL REPORT 1979

    E-Print Network [OSTI]

    Authors, Various

    2010-01-01

    Suspensions for Solar Energy Collection A. Hunt . . .Strategies for Active Solar Energy Systems M. Warren, S.ENVIRONMENT DIVISION SOLAR ENERGY PROGRAM CHAPTER FROM THE

  12. Predicting solar cycle 24 with a solar dynamo model

    E-Print Network [OSTI]

    Arnab Rai Choudhuri; Piyali Chatterjee; Jie Jiang

    2007-01-18

    Whether the upcoming cycle 24 of solar activity will be strong or not is being hotly debated. The solar cycle is produced by a complex dynamo mechanism. We model the last few solar cycles by `feeding' observational data of the Sun's polar magnetic field into our solar dynamo model. Our results fit the observed sunspot numbers of cycles 21-23 extremely well and predict that cycle~24 will be about 35% weaker than cycle~23.

  13. Far-UV Emissions of the Sun in Time: Probing Solar Magnetic Activity and Effects on Evolution of Paleo-Planetary Atmospheres

    E-Print Network [OSTI]

    Edward F. Guinan; Ignasi Ribas; Graham M. Harper

    2003-05-15

    We present and analyze FUSE observations of six solar analogs. These are single, main-sequence G0-5 strs selected as proxies for the Sun at several stages of its main-sequence lifetime. The emission features in the FUSE 920-1180 A wavelength range allow for a critical probe of the hot plasma over three decades in temperature. Using the flux ratio CIII 1176/977 as diagnostics, we investigate the dependence of the electron pressure of the transition region as a function of the rotation period, age and magnetic activity. The results from these solar proxies indicate that the electron pressure of the stellar ~10^5-K plasma decreases by a factor of about 70 between the young, fast-rotating magnetically active star and the old, slow-rotating inactive star. Also, the observations indicate that the average surface fluxes of emission features strongly decrease with increasing stellar age and longer rotation period. The emission flux evolution with age or rotation period is well fitted by power laws, which become steeper from cooler chromospheric (10^4 K) to hotter coronal (10^7 K) plasma. The relationship for the integrated (920-1180 A) FUSE flux indicates that the solar far-ultraviolet emissions were about twice the present value 2.5 Gyr ago and about 4 times the present value 3.5 Gyr ago. Note also that the FUSE/FUV flux of the Zero-Age Main Sequence Sun could have been higher by as much as 50 times. Our analysis suggests that the strong FUV emissions of the young Sun may have played a crucial role in the developing planetary system, in particular through the photoionization, photochemical evolution and possible erosion of the planetary atmospheres. (abridged)

  14. 2, 605637, 2005 Influence of solar

    E-Print Network [OSTI]

    Boyer, Edmond

    HESSD 2, 605­637, 2005 Influence of solar activity on hydrological processes J. P´erez-Peraza et al Sciences Discussions Influence of solar activity on hydrological processes J. P´erez-Peraza 1 , A. Leyva;HESSD 2, 605­637, 2005 Influence of solar activity on hydrological processes J. P´erez-Peraza et al

  15. Systems and methods for solar energy storage, transportation, and conversion utilizing photochemically active organometallic isomeric compounds and solid-state catalysts

    DOE Patents [OSTI]

    Vollhardt, K. Peter C.; Segalman, Rachel A; Majumdar, Arunava; Meier, Steven

    2015-02-10

    A system for converting solar energy to chemical energy, and, subsequently, to thermal energy includes a light-harvesting station, a storage station, and a thermal energy release station. The system may include additional stations for converting the released thermal energy to other energy forms, e.g., to electrical energy and mechanical work. At the light-harvesting station, a photochemically active first organometallic compound, e.g., a fulvalenyl diruthenium complex, is exposed to light and is photochemically converted to a second, higher-energy organometallic compound, which is then transported to a storage station. At the storage station, the high-energy organometallic compound is stored for a desired time and/or is transported to a desired location for thermal energy release. At the thermal energy release station, the high-energy organometallic compound is catalytically converted back to the photochemically active organometallic compound by an exothermic process, while the released thermal energy is captured for subsequent use.

  16. Community Shared Solar with Solarize

    Office of Energy Efficiency and Renewable Energy (EERE)

    An overview of the concept behind The Solarize Guidebook, which offers neighborhoods a plan for getting volume discounts when making group purchases of rooftop solar energy systems.

  17. Solar Thermal Powered Evaporators

    E-Print Network [OSTI]

    Moe, Christian Robert

    2015-01-01

    Solar Thermal Collectors .is solar energy. Solar thermal collector arrays can be usedon integrating solar thermal collectors with desalination

  18. Non-linear force-free field modeling of a solar active region around the time of a major flare and coronal mass ejection

    E-Print Network [OSTI]

    C. J. Schrijver; M. L. DeRosa; T. Metcalf; G. Barnes; B. Lites; T. Tarbell; J. McTiernan; G. Valori; T. Wiegelmann; M. S. Wheatland; T. Amari; G. Aulanier; P. Demoulin; M. Fuhrmann; K. Kusano; S. Regnier; J. K. Thalmann

    2007-11-30

    Solar flares and coronal mass ejections are associated with rapid changes in field connectivity and powered by the partial dissipation of electrical currents in the solar atmosphere. A critical unanswered question is whether the currents involved are induced by the motion of pre-existing atmospheric magnetic flux subject to surface plasma flows, or whether these currents are associated with the emergence of flux from within the solar convective zone. We address this problem by applying state-of-the-art nonlinear force-free field (NLFFF) modeling to the highest resolution and quality vector-magnetographic data observed by the recently launched Hinode satellite on NOAA Active Region 10930 around the time of a powerful X3.4 flare. We compute 14 NLFFF models with 4 different codes and a variety of boundary conditions. We find that the model fields differ markedly in geometry, energy content, and force-freeness. We discuss the relative merits of these models in a general critique of present abilities to model the coronal magnetic field based on surface vector field measurements. For our application in particular, we find a fair agreement of the best-fit model field with the observed coronal configuration, and argue (1) that strong electrical currents emerge together with magnetic flux preceding the flare, (2) that these currents are carried in an ensemble of thin strands, (3) that the global pattern of these currents and of field lines are compatible with a large-scale twisted flux rope topology, and (4) that the ~10^32 erg change in energy associated with the coronal electrical currents suffices to power the flare and its associated coronal mass ejection.

  19. Renewable Energy Finance, Solar Securitization: A Status Report (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-10-01

    This fact sheet was designed to introduce solar securitization and the activities of NREL and the Solar Access to Public Capital (SAPC) working group to the investment community.

  20. Building Codes and Regulations for Solar Water Heating Systems...

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

    but the solar thermal system supplies both domestic hot water and a secondary radiant floor heating system. | Photo courtesy of Jim Schmid Photography, NREL Active Solar...

  1. Comparison of physical properties of quiet and active regions through the analysis of magnetohydrodynamic simulations of the solar photosphere

    SciTech Connect (OSTI)

    Criscuoli, S.

    2013-11-20

    Recent observations have shown that the photometric and dynamic properties of granulation and small-scale magnetic features depend on the amount of magnetic flux of the region they are embedded in. We analyze results from numerical hydrodynamic and magnetohydrodynamic simulations characterized by different amounts of average magnetic flux and find qualitatively the same differences as those reported from observations. We show that these different physical properties result from the inhibition of convection induced by the presence of the magnetic field, which changes the temperature stratification of both quiet and magnetic regions. Our results are relevant for solar irradiance variations studies, as such differences are still not properly taken into account in irradiance reconstruction models.

  2. Flows and Non-thermal Velocities in Solar Active Regions Observed with the Extreme-ultraviolet Imaging Spectrometer on Hinode: A Tracer of Active Region Sources of Heliospheric Magnetic Fields?

    E-Print Network [OSTI]

    G. A. Doschek; H. P. Warren; J. T. Mariska; K. Muglach; J. L. Culhane; H. Hara; T Watanabe

    2008-07-17

    From Doppler velocity maps of active regions constructed from spectra obtained by the Extreme-ultraviolet Imaging Spectrometer (EIS) on the Hinode spacecraft we observe large areas of outflow (20-50 km/s) that can persist for at least a day. These outflows occur in areas of active regions that are faint in coronal spectral lines formed at typical quiet Sun and active region temperatures. The outflows are positively correlated with non-thermal velocities in coronal plasmas. The bulk mass motions and non-thermal velocities are derived from spectral line centroids and line widths, mostly from a strong line of Fe XII at 195.12 Angstroms. The electron temperature of the outflow regions estimated from an Fe XIII to Fe XII line intensity ratio is about 1.2-1.4 MK. The electron density of the outflow regions derived from a density sensitive intensity ratio of Fe XII lines is rather low for an active region. Most regions average around 7E10+8 cm(-3), but there are variations on pixel spatial scales of about a factor of 4. We discuss results in detail for two active regions observed by EIS. Images of active regions in line intensity, line width, and line centroid are obtained by rastering the regions. We also discuss data from the active regions obtained from other orbiting spacecraft that support the conclusions obtained from analysis of the EIS spectra. The locations of the flows in the active regions with respect to the longitudinal photospheric magnetic fields suggest that these regions might be tracers of long loops and/or open magnetic fields that extend into the heliosphere, and thus the flows could possibly contribute significantly to the solar wind.

  3. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    Estimating Unmeasured Solar Radiation Quantities . . . . . .Solar Data a. SOLAR RADIATION Solar radiation data provide aAppendix C - Appendix 0 - Solar Radiation Glossary. Convers

  4. Solar system fault detection

    DOE Patents [OSTI]

    Farrington, R.B.; Pruett, J.C. Jr.

    1984-05-14

    A fault detecting apparatus and method are provided for use with an active solar system. The apparatus provides an indication as to whether one or more predetermined faults have occurred in the solar system. The apparatus includes a plurality of sensors, each sensor being used in determining whether a predetermined condition is present. The outputs of the sensors are combined in a pre-established manner in accordance with the kind of predetermined faults to be detected. Indicators communicate with the outputs generated by combining the sensor outputs to give the user of the solar system and the apparatus an indication as to whether a predetermined fault has occurred. Upon detection and indication of any predetermined fault, the user can take appropriate corrective action so that the overall reliability and efficiency of the active solar system are increased.

  5. Solar system fault detection

    DOE Patents [OSTI]

    Farrington, Robert B. (Wheatridge, CO); Pruett, Jr., James C. (Lakewood, CO)

    1986-01-01

    A fault detecting apparatus and method are provided for use with an active solar system. The apparatus provides an indication as to whether one or more predetermined faults have occurred in the solar system. The apparatus includes a plurality of sensors, each sensor being used in determining whether a predetermined condition is present. The outputs of the sensors are combined in a pre-established manner in accordance with the kind of predetermined faults to be detected. Indicators communicate with the outputs generated by combining the sensor outputs to give the user of the solar system and the apparatus an indication as to whether a predetermined fault has occurred. Upon detection and indication of any predetermined fault, the user can take appropriate corrective action so that the overall reliability and efficiency of the active solar system are increased.

  6. Implementing Solar Technologies at Airports

    SciTech Connect (OSTI)

    Kandt, A.; Romero, R.

    2014-07-01

    Federal agencies, such as the Department of Defense and Department of Homeland Security, as well as numerous private entities are actively pursuing the installation of solar technologies to help reduce fossil fuel energy use and associated emissions, meet sustainability goals, and create more robust or reliable operations. One potential approach identified for siting solar technologies is the installation of solar energy technologies at airports and airfields, which present a significant opportunity for hosting solar technologies due to large amounts of open land. This report focuses largely on the Federal Aviation Administration's (FAA's) policies toward siting solar technologies at airports.

  7. Solar Policy Environment: New Orleans

    Broader source: Energy.gov [DOE]

    To use unprecedented rebuilding of the city of New Orleans is an opportunity for the Office of Recovery Management and its partners to encourage solar in New Orleans’ energy marketplace. While all Solar Cities grantees are undertaking market transformation activities that will both remove barriers to the adoption of solar technologies and reduce the cost of solar technologies, the reconstruction process affords New Orleans a window of opportunity to structurally alter the ways in which solar technologies are regulated, incentivized, produced, and consumed in the Greater New Orleans area.

  8. Session III Solar and stellar cycles and

    E-Print Network [OSTI]

    Moss, David

    .usoskin@oulu.fi Abstract. Observational data concerning the long-term history of cyclic solar activity as recor- ded of the activity wave. However, the link between the concepts of solar dynamo and helioseismological data remains, successive solar cycles differ slightly from one another, in amplitude, length and other characteristics

  9. Renewable energy technologies for federal facilities: Solar water heating

    SciTech Connect (OSTI)

    1996-05-01

    This sheet presents information on solar water heaters (passive and active), solar collectors (flat plate, evacuated tube, parabolic trough), lists opportunities for use of solar water heating, and describes what is required and the costs. Important terms are defined.

  10. Fullerene surfactants and their use in polymer solar cells

    DOE Patents [OSTI]

    Jen, Kwan-Yue; Yip, Hin-Lap; Li, Chang-Zhi

    2015-12-15

    Fullerene surfactant compounds useful as interfacial layer in polymer solar cells to enhance solar cell efficiency. Polymer solar cell including a fullerene surfactant-containing interfacial layer intermediate cathode and active layer.

  11. Solar: A Clean Energy Source for Utilities (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-07-01

    Summarizes the activities that the DOE Solar Energy Technologies Program conducts to collaborate with and benenfit utilities with the goal of accelerating solar technologies adoption by removing barriers to solar deployment.

  12. Powering Our Sustainable Future (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-07-01

    One of the Energy Department's most successful outreach efforts, the Solar Decathlon provides sponsors with rich opportunities for recognition - from naming rights to signage and speaking opportunities to special events. Support from the business community is crucial to the success of the competition and the experience of thousands of student decathletes. This sponsorship brochure reveals reasons why sponsors support the U.S. Department of Energy Solar Decathlon and how organizations can become involved as Solar Decathlon sponsors.

  13. 6 7division of engineering & applied science ENGenious ISSUE 8 2011 SNAP SHOTSSNAP SHOTS

    E-Print Network [OSTI]

    Haile, Sossina M.

    Solar Decathlon. The Solar Decathlon challenges collegiate teams to design, build, and operate solar,visitkiss.caltech.edu/workshops/space-challenge2011. LEAD:Launch of Summer Engineering and Computer Science Institute Building upon Caltech's mission and staff,parents,and representatives from Apple. Formoreinformation,visitcms.caltech.edu/news/389. Solar

  14. Solar: A Clean Energy Source for Utilities

    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 with utilities to remove the technical, regulatory, and market challenges they face in deploying solar technologies.

  15. Solar Forecasting

    Broader source: Energy.gov [DOE]

    On December 7, 2012, DOE announced $8 million to fund two solar projects that are helping utilities and grid operators better forecast when, where, and how much solar power will be produced at U.S....

  16. Solar Rights

    Broader source: Energy.gov [DOE]

    A solar energy system is defined as "a system affixed to a building or buildings that uses solar devices, which are thermally isolated from living space or any other area where the energy is used...

  17. Solar Rights

    Broader source: Energy.gov [DOE]

    In the context of this law, a solar energy device is a system "manufactured and sold for the sole purpose of facilitating the collection and beneficial use of solar energy, including passive...

  18. GEOMAGNETIC CONSEQUENCES OF THE SOLAR FLARES DURING THE LAST HALE SOLAR CYCLE (II)

    E-Print Network [OSTI]

    GEOMAGNETIC CONSEQUENCES OF THE SOLAR FLARES DURING THE LAST HALE SOLAR CYCLE (II) Georgeta Maris phenomena. We analyze the cyclic variability of solar flares (registered in H and X-ray) and compare)) for the last Hale cycle. The solar cycles 22 and 23 are different in the level of flare activity

  19. Solar collectors

    SciTech Connect (OSTI)

    Cassidy, V.M.

    1981-11-01

    Practical applications of solar energy in commercial, industrial and institutional buildings are considered. Two main types of solar collectors are described: flat plate collectors and concentrating collectors. Efficiency of air and hydronic collectors among the flat plate types are compared. Also several concentrators are described, including their sun tracking mechanisms. Descriptions of some recent solar installations are presented and a list representing the cross section of solar collector manufacturers is furnished.

  20. Team California Wins the Communications Contest at U.S. Department...

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

    teams from the United States, Canada, Germany, and Spain are competing in DOE's fourth Solar Decathlon to design, build, and operate houses powered by the sun. Teams are...

  1. Maps | Department of Energy

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

    Solar Decathlon: How far did they travel? Combustion Engine Combustion Engine Wind Farms through the Years Wind Farms through the Years Visualizing Electric Vehicle Sales...

  2. Whole Building Performance-Based Procurement Training | Department...

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

    More Documents & Publications Best Practices for Controlling Capital Costs in Net Zero Energy Design and Construction - 2014 BTO Peer Review Solar Decathlon Building America...

  3. University Teams to Showcase Affordable, Energy Efficient Living...

    Office of Environmental Management (EM)

    University Teams to Showcase Affordable, Energy Efficient Living in U.S. Department of Energy Solar Decathlon 2011 University Teams to Showcase Affordable, Energy Efficient Living...

  4. CHIP House Takes Design to Different Heights (Literally)

    Broader source: Energy.gov [DOE]

    Check out the SCI-Arc/Caltech 2011 Solar Decathlon team's house to find out more about their net-zero energy use home -- the CHIP House.

  5. 25 People x 4 Days + 1 Manual = Team Belgium’s E-Cube

    Broader source: Energy.gov [DOE]

    No, it's not an Ikea manual; it's the instructions for how to construct Team Belgium's "E-Cube" home for the 2011 Solar Decathlon.

  6. News & Blog | Department of Energy

    Energy Savers [EERE]

    Solar Decathlon Announced today before an enthusiastic crowd at the Orange County Great Park, Irvine, CA, Stevens Institute of Technology of Hoboken, NJ, took first place in both...

  7. Solar Physics A Journal for Solar and Solar-Stellar

    E-Print Network [OSTI]

    Padmanabhan, Janardhan

    investigated in the build-up to one of the deepest solar minima expe- rienced in the past 100 years1 23 Solar Physics A Journal for Solar and Solar-Stellar Research and the Study of Solar-013-0335-3 Changes in Quasi-periodic Variations of Solar Photospheric Fields: Precursor to the Deep Solar Minimum

  8. Student Activities Student Activities

    E-Print Network [OSTI]

    with Solar Energy? Activity B How do Atmospheres Produce their Effect Upon Surface Temperatures? Activity C and populations found in developing countries in Asia, Africa and Latin America. Figure 4.3 illustrates the actual and projected growths in global population. 0Topic ,Real World Problem: Culprits of Climate Warming and Cooling

  9. Living Rev. Solar Phys., 5, (2008), 3 http://www.livingreviews.org/lrsp-2008-3 in solar physics

    E-Print Network [OSTI]

    Usoskin, Ilya G.

    2008-01-01

    Living Rev. Solar Phys., 5, (2008), 3 http://www.livingreviews.org/lrsp-2008-3 in solar physics L I V I N G REVIEWS A History of Solar Activity over Millennia Ilya G. Usoskin Sodankyl¨a Geophysical here is a review of present knowledge of the long-term behavior of solar activity on a multi

  10. Solar cell array interconnects

    DOE Patents [OSTI]

    Carey, P.G.; Thompson, J.B.; Colella, N.J.; Williams, K.A.

    1995-11-14

    Electrical interconnects are disclosed for solar cells or other electronic components using a silver-silicone paste or a lead-tin (Pb-Sn) no-clean fluxless solder cream, whereby the high breakage of thin (<6 mil thick) solar cells using conventional solder interconnect is eliminated. The interconnects of this invention employs copper strips which are secured to the solar cells by a silver-silicone conductive paste which can be used at room temperature, or by a Pb-Sn solder cream which eliminates undesired residue on the active surfaces of the solar cells. Electrical testing using the interconnects of this invention has shown that no degradation of the interconnects developed under high current testing, while providing a very low contact resistance value. 4 figs.

  11. Solar cell array interconnects

    DOE Patents [OSTI]

    Carey, Paul G. (Mountain View, CA); Thompson, Jesse B. (Brentwood, CA); Colella, Nicolas J. (Livermore, CA); Williams, Kenneth A. (Livermore, CA)

    1995-01-01

    Electrical interconnects for solar cells or other electronic components using a silver-silicone paste or a lead-tin (Pb-Sn) no-clean fluxless solder cream, whereby the high breakage of thin (<6 mil thick) solar cells using conventional solder interconnect is eliminated. The interconnects of this invention employs copper strips which are secured to the solar cells by a silver-silicone conductive paste which can be used at room temperature, or by a Pb-Sn solder cream which eliminates undesired residue on the active surfaces of the solar cells. Electrical testing using the interconnects of this invention has shown that no degradation of the interconnects developed under high current testing, while providing a very low contact resistance value.

  12. Market assessment for active solar heating and cooling products. Category B: a survey of decision-makers in the HVAC marketplace. Final report

    SciTech Connect (OSTI)

    1980-09-01

    A comprehensive evaluation of the market for solar heating and cooling products for new and retrofit markets is reported. The emphasis is on the analysis of solar knowledge among HVAC decision makers and a comprehensive evaluation of their solar attitudes and behavior. The data from each of the following sectors are described and analyzed: residential consumers, organizational and manufacturing buildings, HVAC engineers and architects, builders/developers, and commercial/institutional segments. (MHR)

  13. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01

    network approach of solar potential in Turkey,” Renewabledue to the high solar resource potential. However, the solar

  14. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    Estimating Unmeasured Solar Radiation Quantities . . . . . .Weather Data . . . . . , . , . . . . . . . . . .Solar DataB. l'he Solar Constant. . . . . . C. Solar Time and Standard

  15. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    data records. 1, Solar Data Solar energy is a general termin obtaining reliable data for solar energy applications,data and analyzed the consequences of designing solar energy

  16. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    a characteristic solar potential is expected to prevail, Theso many sites of potential solar energy applications will besun creates a high potential for solar energy use. Solar-

  17. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01

    and forecasting of solar radiation data: a review,”forecasting of solar- radiation data,” Solar Energy, vol.sequences of global solar radiation data for isolated sites:

  18. Solar America Cities Awards, Solar Energy Technologies Program, Fact Sheet, March 2009

    SciTech Connect (OSTI)

    Not Available

    2009-03-01

    This publication represents an ongoing effort to support outreach activities through the Solar America Cities program. The two-page fact sheet offers an overview of the SAC program and lists specific resources for more information on developing solar programs.

  19. Solar Rights

    Broader source: Energy.gov [DOE]

    Ordinances, bylaws, or regulations may reasonably restrict the installation and use of solar energy devices to protect public health and safety, buildings from damage, historic/aesthetic values ...

  20. Approaches To Integrating A HIgh Penertration Of Solar PV and CPV Onto The Electrical Grid

    E-Print Network [OSTI]

    Hill, Steven Craig

    2013-01-01

    energy consumption by human activity [72]. Clearly, solarenergy by reducing consumption of generating plant fuel. Solar

  1. Photovoltaics: Solar Energy Technologies Program (SETP) (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-10-01

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

  2. Market Transformation: Solar Energy Technologies Program (SETP) (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-10-01

    Fact sheet summarizing the goals and activities of the DOE Solar Energy Technologies Program efforts within its market transformation subprogram.

  3. Solar Cell Simulation

    K-12 Energy Lesson Plans and Activities Web site (EERE)

    Students model the flow of energy from the sun as it enters a photovoltaic cell, moves along a wire and powers a load. The game-like atmosphere involves the younger students and helps them understand the continuous nature of the flow of energy. For a related lesson, please see the activity “Solar Powered System” (PDF 430 KB).

  4. COLLOIDAL SEMICONDUCTOR NANOCRYSTALS BASED SOLAR CELLS

    E-Print Network [OSTI]

    Tessler, Nir

    COLLOIDAL SEMICONDUCTOR NANOCRYSTALS BASED SOLAR CELLS Nir Yaacobi-Gross #12;COLLOIDAL SEMICONDUCTOR NANOCRYSTALS BASED SOLAR CELLS Research Thesis Submitted in Partial Fulfilment of the Requirements type II bulk homojunctions in near IR active all nanocrystals solar cells. Submitted to Adv Mater. 2011

  5. SOLAR CENTER INFORMATION Industrial Extension Service

    E-Print Network [OSTI]

    -berm insulation. The house also uses compact fluorescent lighting, a ground- coupled heat pump, and has bothSOLAR CENTER INFORMATION Industrial Extension Service College of Engineering NCSU Box 7401 active solar water heating and photovoltaic (PV) systems. The Solar House was resided in for three years

  6. Solar Physics A Journal for Solar and Solar-

    E-Print Network [OSTI]

    Padmanabhan, Janardhan

    1 23 Solar Physics A Journal for Solar and Solar- Stellar Research and the Study of Solar-010-9653- x Solar Polar Fields During Cycles 21??? 23: Correlation with Meridional Flows #12;1 23 Your article's request, provided it is not made publicly available until 12 months after publication. #12;Solar Phys

  7. Unified Solar

    Broader source: Energy.gov [DOE]

    Unified Solar is an MIT startup that is commercializing an integrated circuit solution that eliminates most of the adverse effects caused by partial shading in photovoltaic power systems. With its patent-pending design, Unified Solar's solution is smaller, cheaper and more powerful than any competing power optimizer in the market.

  8. Petrovay: Solar physics Helioseismology SOLAR OSCILLATIONS: INTRODUCTION

    E-Print Network [OSTI]

    Petrovay, Kristóf

    where = T(P0/P) ad (potential temperature) #12;Petrovay: Solar physics Helioseismology Group velocity Helioseismology Global helioseismology: Determine set of nlm's infer global mean solar structure. LocalPetrovay: Solar physics Helioseismology SOLAR OSCILLATIONS: INTRODUCTION Small departures from

  9. Solar | ornl.gov

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

    Solar SHARE Solar ORNL's Solar Technologies program supports the U.S. Department of Energy (DOE) Solar Energy Technologies Office - SunShot Initiative goal to make solar energy...

  10. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    Techniques for Daily Solar Radiation Data. Proceedings ofa. SOLAR RADIATION Solar radiation data provide a measure ofMonthly Solar Data Latitude: Jan SOLAR RADIATION (kWhJm2 per

  11. Sandia Energy - Solar Resource Assessment

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

    Solar Resource Assessment Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Resource Assessment Solar Resource AssessmentTara...

  12. Sandia Energy - Solar Market Transformation

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

    Solar Market Transformation Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Market Transformation Solar Market TransformationTara...

  13. Solar Two

    SciTech Connect (OSTI)

    Not Available

    1998-04-01

    Solar Two is a concentrating solar power plant that can supply electric power on demand to the local utility, Southern California Edison Company. It can do so because it operates not only during sunny parts of the day, but it can store enough thermal energy from the sun to operate during cloudy periods and after dark, for up to three hours, at its rated output of 10 megawatts (MW). For the first time ever, a utility scale solar power plant can supply electricity when the utility needs it most, to satisfy the energy requirements of its customers.

  14. Solar Rights

    Broader source: Energy.gov [DOE]

    In June of 2015, SB 1626 was signed into law. It provides that during the development period, the developer may only prohibit  a property owner from installing solar in developments with 50 or...

  15. Nanocrystal Solar Cells

    SciTech Connect (OSTI)

    Gur, Ilan

    2006-12-15

    This dissertation presents the results of a research agenda aimed at improving integration and stability in nanocrystal-based solar cells through advances in active materials and device architectures. The introduction of 3-dimensional nanocrystals illustrates the potential for improving transport and percolation in hybrid solar cells and enables novel fabrication methods for optimizing integration in these systems. Fabricating cells by sequential deposition allows for solution-based assembly of hybrid composites with controlled and well-characterized dispersion and electrode contact. Hyperbranched nanocrystals emerge as a nearly ideal building block for hybrid cells, allowing the controlled morphologies targeted by templated approaches to be achieved in an easily fabricated solution-cast device. In addition to offering practical benefits to device processing, these approaches offer fundamental insight into the operation of hybrid solar cells, shedding light on key phenomena such as the roles of electrode-contact and percolation behavior in these cells. Finally, all-inorganic nanocrystal solar cells are presented as a wholly new cell concept, illustrating that donor-acceptor charge transfer and directed carrier diffusion can be utilized in a system with no organic components, and that nanocrystals may act as building blocks for efficient, stable, and low-cost thin-film solar cells.

  16. Solar and Wind Easements & Rights Laws & Local Option Solar Rights...

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

    Schools State Government Federal Government Agricultural Institutional Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Thermal Electric Solar Thermal...

  17. STATE OF THE SCHOOL OF ENGINEERING

    E-Print Network [OSTI]

    Maurer,. Edwin P.

    ... MECH: smart water heater, autonomous robots, nanosat testing ... INTER: extreme environment exploration is not a spectator sport! SCHOOL OF ENGINEERING - 2014 Solar Decathlon ENGR 1 Final Civil Engineering Lab Collaborative Study #12;SCHOOL OF ENGINEERING Solar Decathlon ­ unrivaled experience SCHOOL OF ENGINEERING

  18. 25ste jaargang | nr. 6 | nr. 213 | afgiftekantoor Gent X | periodiek tijdschrift | verschijnt tweemaandelijks | P409859 | afzendadres: Onderbergen 1, 9000 Gent

    E-Print Network [OSTI]

    Gent, Universiteit

    ? universiteit gent ruimte transport energie wonen #12;juli»1-15 augustus»8-31 september»1-23* Sint;11 E-Cube naar finale Solar Decathlon 2 Jostein Gripsrud bekijkt ons natiegevoel 8 Wat doen UGent van Solar Decathlon, een prestigieuze wedstrijd die studenten aanzet een energievriendelijke woning te

  19. Multiple Exciton Generation Solar Cells

    SciTech Connect (OSTI)

    Luther, J. M.; Semonin, O. E.; Beard, M. C.; Gao, J.; Nozik, A. J.

    2012-01-01

    Heat loss is the major factor limiting traditional single junction solar cells to a theoretical efficiency of 32%. Multiple Exciton Generation (MEG) enables efficient use of the solar spectrum yielding a theoretical power conversion efficiency of 44% in solar cells under 1-sun conditions. Quantum-confined semiconductors have demonstrated the ability to generate multiple carriers but present-day materials deliver efficiencies far below the SQ limit of 32%. Semiconductor quantum dots of PbSe and PbS provide an active testbed for developing high-efficiency, inexpensive solar cells benefitting from quantum confinement effects. Here, we will present recent work of solar cells employing MEG to yield external quantum efficiencies exceeding 100%.

  20. Solar Rights | Department of Energy

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

    Nonprofit Residential Schools State Government Federal Government Savings Category Solar - Passive Solar Water Heat Solar Space Heat Solar Photovoltaics Daylighting Solar Pool...

  1. Boston solar retrofits: studies of solar access and economics

    SciTech Connect (OSTI)

    Shapiro, M.

    1980-11-01

    Studies of solar access and solar retrofit economics are described for residential applications in the City of Boston. The study of solar access was based upon a random sample of 94 buildings; the sample was stratified to ensure a broad geographic representation from the city's various sections. Using available data on the heights and orientations of the sampled structures and surrounding buildings, each building's hourly access to sunlight was computed separately for the roof and south facing walls. These data were then aggregated by broad structural classifications in order to provide general measures of solar access. The second study was a comparative analysis of the economics of several solar heating and hot water systems. An active hot water system, installed using pre-assembled, commercially purchased equipment, was selected as a reference technology. A variety of measures of economic performance were computed for this system, with and without existing tax credits and under various financing arrangements. Next, a number of alternative approaches for solar space and water heating were identified from interviews with individuals and groups involved in solar retrofit projects in the Boston area. The objective was to identify approaches that many of those interviewed believe to be low-cost means of applying solar energy in residential settings. The approaches selected include thermal window covers, wall collectors, bread box water heaters, and sun spaces. Preliminary estimates of the performance of several representative designs were developed and the economics of these designs evaluated.

  2. Nanocrystal Solar Cells

    E-Print Network [OSTI]

    Gur, Ilan

    2006-01-01

    will enable optimal solar cell efficiencies in multiple bandlow cost, high efficiency hybrid solar cells. 4.6 Conclusioncosts and improving efficiencies of solar photovoltaic

  3. Solar Thermal Powered Evaporators

    E-Print Network [OSTI]

    Moe, Christian Robert

    2015-01-01

    and thermal energy storage in solar thermal applications,"aided or powered by solar thermal energy. A section is alsoexhaustive review of solar thermal energy systems has been

  4. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01

    the limits of solar photovoltaics (PV) in traditionalthe limits of solar photovoltaics (PV) in electric powertechnologies is that of solar photovoltaics due to the high

  5. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01

    2008, uses concentrated solar power to split water. Figurethe main reason the potential for solar power is boundless.a clean energy source, solar power is inexhaustible, fairly

  6. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01

    and M. Cony, “Prediction of global solar irradiance based onand C. K. Chan, “Prediction of hourly solar radiation usingand K. C. Chee, “Prediction of hourly solar radiation using

  7. Nanocrystal Solar Cells

    E-Print Network [OSTI]

    Gur, Ilan

    2006-01-01

    Nov, 2005). Chapter 4 Hybrid solar cells with 3-dimensionalinorganic nanocrystal solar cells 5.1 Introduction In recentoperation of organic based solar cells and distinguish them

  8. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    of these errors on solar design is discussed. To facilitateone of the simplified solar design methods discussed inWisconsin Interactive Solar Heating Design Program, , , , c,

  9. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01

    2.1.2 European Solar Radiation Atlas (ESRA)2.4 Evaluation of Solar Forecasting . . . . . . . . .2.4.1 Solar Variability . . . . . . . . . . . . .

  10. Solar Thermal Powered Evaporators

    E-Print Network [OSTI]

    Moe, Christian Robert

    2015-01-01

    and C. Y. Zhao, "A review of solar collectors and thermalenergy storage in solar thermal applications," Appliedon photovoltaic/thermal hybrid solar technology," Applied

  11. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01

    the cloud index,” Solar Energy, vol. 81, no. 2, pp. 280 –Cover Indices,” ASME Journal of Solar Energy Engineering (inHorizontal Irradiance,” submitted to Solar Energy, 2012.

  12. Solar Thermal Powered Evaporators

    E-Print Network [OSTI]

    Moe, Christian Robert

    2015-01-01

    C. Y. Zhao, "A review of solar collectors and thermal energya Passive Flat-Plate Solar Collector," International Journalof Flat Plate Solar Collector Equipped with Rectangular Cell

  13. Nanocrystal Solar Cells

    E-Print Network [OSTI]

    Gur, Ilan

    2006-01-01

    nanocrystal-polymer solar cells The full potential of hybridto reach the full potential of polymer blend solar cells.solar cells described here offer several potential

  14. Solar Resource Assessment

    Broader source: Energy.gov [DOE]

    DOE solar resource research focuses on understanding historical solar resource patterns and making future predictions, both of which are needed to support reliable power system operation. As solar...

  15. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01

    2.1.2 European Solar Radiation Atlas (ESRA)synthetic hourly radiation,” Solar Energy, vol. 49, pp. 67–for supplementing solar radiation network data,” Final

  16. SOLAR ENERGY PROGRAM. CHAPTER FROM THE ENERGY AND ENVIRONMENT ANNUAL REPORT 1978

    E-Print Network [OSTI]

    authors, Various

    2011-01-01

    PG&E/LBL Solar Data Network D. Anson . • . • . . • The RoleWahlig Development of Solar-Driven Ammonia-Water AbsorptionSupport Activities for DOE Solar Heating and Cooling

  17. ESMN Solar Magnetism ESMN Pages --Plain Text Copy August 13, 2011

    E-Print Network [OSTI]

    Rutten, Rob

    1 European Network ESMN Solar Magnetism ESMN Pages -- Plain Text Copy ­ August 13, 2011 http . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 Structure and dynamics of solar surface fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.3 Topology and evolution of solar active regions

  18. Shenandoah parabolic dish solar collector

    SciTech Connect (OSTI)

    Kinoshita, G.S.

    1985-01-01

    The objectives of the Shenandoah, Georgia, Solar Total Energy System are to design, construct, test, and operate a solar energy system to obtain experience with large-scale hardware systems for future applications. This report describes the initial design and testing activities conducted to select and develop a collector that would serve the need of such a solar total energy system. The parabolic dish was selected as the collector most likely to maximize energy collection as required by this specific site. The fabrication, testing, and installation of the parabolic dish collector incorporating improvements identified during the development testing phase are described.

  19. Solar: A Clean Energy Source for Utilities (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-09-01

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts with utilities to remove the technical, regulatory, and market challenges they face in deploying solar technologies.

  20. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01

    of solar- radiation data,” Solar Energy, vol. 19, no. 6, pp.16 independent data banks,” Solar Energy, vol. 80, no. 4,data,” Final Report of International Energy Agency Solar

  1. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    Radiation in Canada. Solar Energy ~, p.153. Threlkeld, J.L.pool. As the use of solar energy becomes more widespread,a high potential for solar energy use. Solar-heated swimming

  2. Solar ADEPT: Efficient Solar Energy Systems

    SciTech Connect (OSTI)

    2011-01-01

    Solar ADEPT Project: The 7 projects that make up ARPA-E's Solar ADEPT program, short for 'Solar Agile Delivery of Electrical Power Technology,' aim to improve the performance of photovoltaic (PV) solar energy systems, which convert the sun's rays into electricity. Solar ADEPT projects are integrating advanced electrical components into PV systems to make the process of converting solar energy to electricity more efficient.

  3. Study of surface enhanced resonant Raman spectroscopy of chromophores on unaggregated plasmonically active nanoparticles / Surface-enhanced Raman study of the interaction of the PEDOT:PSS and P3HT/PCBM components of organic polymer solar cells with plasmonically active nanoparticles

    E-Print Network [OSTI]

    Stavytska-Barba, Marina Valeriyivna

    2012-01-01

    reporting solar cell efficiency improvements, and somereporting solar cell efficiency improvements by 15-70%C. Improvement in the Hole Collection of Polymer Solar Cells

  4. Study of surface enhanced resonant Raman spectroscopy of chromophores on unaggregated plasmonically active nanoparticles / Surface-enhanced Raman study of the interaction of the PEDOT:PSS and P3HT/PCBM components of organic polymer solar cells with plasmonically active nanoparticles

    E-Print Network [OSTI]

    Stavytska-Barba, Marina Valeriyivna

    2012-01-01

    Hybrid Plasmonic Organic Solar Cells with Ag Nanoparticles.a Bulk Heterojunction Organic Solar Cell. Opt. Express 2010,Light Collection in Organic Solar Cells. Appl. Phys. Lett.

  5. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01

    Beckman, Solar Energy Thermal Processes (John Wiley & Sons,New York. Solar Energy Thermal Processes. John Duncan, C,

  6. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01

    and operation of solar power plants and the model- ing offor application to solar ther- mal power plants energy

  7. VISUAL-SOLAR

    Energy Science and Technology Software Center (OSTI)

    003661IBMPC00 Visual-SOLAR: Modeling and Visualization of Solar Radiation Potential on Individual Building Rooftops   

  8. CUTTING SOLAR RED TAPECUTTING SOLAR RED TAPE Evergreen State Solar PartnershipEvergreen State Solar Partnership

    E-Print Network [OSTI]

    READY BUILDINGS Solar access, easements, rights now and future Technical design ­ rCUTTING SOLAR RED TAPECUTTING SOLAR RED TAPE Evergreen State Solar PartnershipEvergreen State Solar Partnership Rooftop Solar Challenge 1 Sunshot #12;WASHINGTON PV CONTEXTWASHINGTON PV CONTEXT 285 cities, 39

  9. The turbulent cascade and proton heating in the solar wind during solar minimum

    SciTech Connect (OSTI)

    Coburn, Jesse T.; Smith, Charles W.; Vasquez, Bernard J.; Stawarz, Joshua E.; Forman, Miriam A.

    2013-06-13

    Solar wind measurements at 1 AU during the recent solar minimum and previous studies of solar maximum provide an opportunity to study the effects of the changing solar cycle on in situ heating. Our interest is to compare the levels of activity associated with turbulence and proton heating. Large-scale shears in the flow caused by transient activity are a source that drives turbulence that heats the solar wind, but as the solar cycle progresses the dynamics that drive the turbulence and heat the medium are likely to change. The application of third-moment theory to Advanced Composition Explorer (ACE) data gives the turbulent energy cascade rate which is not seen to vary with the solar cycle. Likewise, an empirical heating rate shows no significan changes in proton heating over the cycle.

  10. The HERMES Solar Atlas and the spectroscopic analysis of the seismic solar analogue KIC3241581

    E-Print Network [OSTI]

    Beck, P G; Van Reeth, T; Tkachenko, A; Raskin, G; van Winckel, H; Nascimento, J -D do; Salabert, D; Corsaro, E; Garcia, R A

    2015-01-01

    Solar-analog stars provide an excellent opportunity to study the Sun's evolution, i.e. the changes with time in stellar structure, activity, or rotation for solar-like stars. The unparalleled photometric data from the NASA space telescope Kepler allows us to study and characterise solar-like stars through asteroseismology. We aim to spectroscopically investigate the fundamental parameter and chromospheric activity of solar analogues and twins, based on observations obtained with the HERMES spectrograph and combine them with asteroseismology. Therefore, we need to build a solar atlas for the spectrograph, to provide accurate calibrations of the spectroscopically determined abundances of solar and late type stars observed with this instrument and thus perform differential spectral comparisons. We acquire high-resolution and high signal-to-noise spectroscopy to construct three solar reference spectra by observing the reflected light of Vesta and Victoria asteroids and Europa (100

  11. Living Rev. Solar Phys., 10, (2013), 1 http://www.livingreviews.org/lrsp-2013-1

    E-Print Network [OSTI]

    Usoskin, Ilya G.

    2013-01-01

    Living Rev. Solar Phys., 10, (2013), 1 http://www.livingreviews.org/lrsp-2013-1 (Update of lrsp-2008-3) in solar physics L I V I N G REVIEWS A History of Solar Activity over Millennia Ilya G. Usoskin is a review of present knowledge of the long-term behavior of solar activity on a multi-millennial timescale

  12. Solar Phys (2009) 254: 345355 DOI 10.1007/s11207-008-9293-6

    E-Print Network [OSTI]

    Usoskin, Ilya G.

    2009-01-01

    Solar Phys (2009) 254: 345­355 DOI 10.1007/s11207-008-9293-6 Grand Minima of Solar Activity demonstrate that a simple solar dynamo model, in the form of a Parker migra- tory dynamo with random into a Grand Minimum and the subsequent gradual recovery of solar activity, as well as mixed-parity butterfly

  13. The DOE Solar Thermal Electric Program

    SciTech Connect (OSTI)

    Mancini, T.R.

    1994-06-01

    The Department of Energy`s Solar Thermal Electric Program is managed by the Solar thermal and biomass Power division which is part of the Office of utility Technologies. The focus of the Program is to commercialize solar electric technologies. In this regard, three major projects are currently being pursued in trough, central receiver, and dish/Stirling electric power generation. This paper describes these three projects and the activities at the National laboratories that support them.

  14. SOLAR ENERGY FOR ACADEMIC INSTITUTIONS Solar Suitability Assessment

    E-Print Network [OSTI]

    Brownstone, Rob

    SOLAR ENERGY FOR ACADEMIC INSTITUTIONS Solar Suitability Assessment of Dalhousie University.................................................................................................. 2 2.2 Solar Radiation Data for Calculating Solar Energy Resource .................... 3 3 Campus.1 Evaluation of Suitability for Solar Energy Generation................................ 12 4.2 Solar

  15. Solar Impulse's Solar-Powered Plane

    ScienceCinema (OSTI)

    Moniz, Ernest; Piccard, Bertrand; Reicher, Dan

    2014-01-07

    Solar Impulse lands in Washington, DC at Washington Dulles International Airport as part of its journey across the United States. Secretary Ernest Moniz speaks about how advancements like those at the Department of Energy are leading the way for innovations like the solar-powered plane. Footage of the solar-powered plane courtesy of Solar Impulse.

  16. Solar Impulse's Solar-Powered Plane

    SciTech Connect (OSTI)

    Moniz, Ernest; Piccard, Bertrand; Reicher, Dan

    2013-07-08

    Solar Impulse lands in Washington, DC at Washington Dulles International Airport as part of its journey across the United States. Secretary Ernest Moniz speaks about how advancements like those at the Department of Energy are leading the way for innovations like the solar-powered plane. Footage of the solar-powered plane courtesy of Solar Impulse.

  17. Solar Policy Environment: Salt Lake

    Broader source: Energy.gov [DOE]

    The overall objective of the “Solar Salt Lake” (SSL) team is to develop a fully-scoped city and county-level implementation plan that will facilitate at least an additional ten megawatts of solar photovoltaic (PV) installations in the government, commercial, industrial, and residential sectors by 2015. To achieve this aggressive goal, the program strategy includes a combination of barrier identification, research, and policy analysis that utilizes the input of various stakeholders. Coupled with these activities will be the development and implementation of pilot installations in the government and residential sectors, and broad outreach to builders and potential practitioners of solar energy products in the process. In this way, while creating mechanisms to enable a demand for solar, SSL will also facilitate capacity building for suppliers, thereby helping to ensure long-term sustainability for the regional market.

  18. Solar collector

    SciTech Connect (OSTI)

    Wilhelm, W.G.

    1982-05-04

    The field of this invention is solar collectors, and more particularly, the invention pertains to a flat plate collector that employs high performance thin films. The solar collector of this invention overcomes several problems in this field, such as excessive hardware, cost and reliability, and other prior art drawbacks outlined in the specification. In the preferred form, the apparatus features a substantially rigid planar frame. A thin film window is bonded to one planar side of the frame. An absorber of laminate construction is comprised of two thin film layers that are sealed perimetrically. The layers define a fluid-tight planar envelope of large surface area to volume through which a heat transfer fluid flows. Absorber is bonded to the other planar side of the frame. The thin film construction of the absorber assures substantially full envelope wetting and thus good efficiency. The window and absorber films stress the frame adding to the overall strength of the collector.

  19. Solar Neutrinos

    E-Print Network [OSTI]

    R. G. H. Robertson

    2006-02-05

    Experimental work with solar neutrinos has illuminated the properties of neutrinos and tested models of how the sun produces its energy. Three experiments continue to take data, and at least seven are in various stages of planning or construction. In this review, the current experimental status is summarized, and future directions explored with a focus on the effects of a non-zero theta-13 and the interesting possibility of directly testing the luminosity constraint. Such a confrontation at the few-percent level would provide a prediction of the solar irradiance tens of thousands of years in the future for comparison with the present-day irradiance. A model-independent analysis of existing low-energy data shows good agreement between the neutrino and electromagnetic luminosities at the +/- 20 % level.

  20. Solar Blog

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesAVideo »ServicesShaleEnergyValleySolar Access

  1. EIS-0449: Solar Millennium Blythe Solar Power Project in Riverside...

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

    9: Solar Millennium Blythe Solar Power Project in Riverside County, CA EIS-0449: Solar Millennium Blythe Solar Power Project in Riverside County, CA December 10, 2010 EIS-0449:...

  2. San Francisco, California: Solar in Action (Brochure), Solar...

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

    Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) San Francisco, California: Solar in Action (Brochure), Solar America Cities,...

  3. China Glass Solar aka CG Solar formerly Weihai Bluestar Terra...

    Open Energy Info (EERE)

    China Glass Solar aka CG Solar formerly Weihai Bluestar Terra Photovoltaic Co Ltd Jump to: navigation, search Name: China Glass Solar (aka CG Solar, formerly Weihai Bluestar Terra...

  4. SOLAR MODELS WITH ACCRETION. I. APPLICATION TO THE SOLAR ABUNDANCE...

    Office of Scientific and Technical Information (OSTI)

    SOLAR MODELS WITH ACCRETION. I. APPLICATION TO THE SOLAR ABUNDANCE PROBLEM Citation Details In-Document Search Title: SOLAR MODELS WITH ACCRETION. I. APPLICATION TO THE SOLAR...

  5. Portland, Oregon: Solar in Action (Brochure), Solar America Cities...

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

    Portland, Oregon: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Portland, Oregon: Solar in Action (Brochure), Solar America Cities,...

  6. San Antonio, Texas: Solar in Action (Brochure), Solar America...

    Energy Savers [EERE]

    San Antonio, Texas: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) San Antonio, Texas: Solar in Action (Brochure), Solar America...

  7. Orlando, Florida: Solar in Action (Brochure), Solar America Cities...

    Office of Environmental Management (EM)

    Orlando, Florida: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Orlando, Florida: Solar in Action (Brochure), Solar America Cities,...

  8. Denver, Colorado: Solar in Action (Brochure), Solar America Cities...

    Office of Environmental Management (EM)

    Denver, Colorado: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Denver, Colorado: Solar in Action (Brochure), Solar America Cities,...

  9. Seattle, Washington: Solar in Action (Brochure), Solar America...

    Office of Environmental Management (EM)

    Seattle, Washington: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Seattle, Washington: Solar in Action (Brochure), Solar America...

  10. Houston, Texas: Solar in Action (Brochure), Solar America Cities...

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

    Houston, Texas: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Houston, Texas: Solar in Action (Brochure), Solar America Cities,...

  11. Solar Physics DOI: 10.1007/----

    E-Print Network [OSTI]

    Braun, Douglas C.

    magnetic indices are used to model the solar irradiance and ultimately to forecast it. However activity. Keywords: Helioseismology, Magnetic fields, Irradiance forecast 1. Introduction Photospheric and far-side maps. The Solar Wind Anisotropies (SWAN) instrument, onboard SOHO, has been producing maps

  12. Optical Durability of Candidate Solar Reflectors for Concentrating Solar Power

    SciTech Connect (OSTI)

    Kennedy, C. E.; Terwilliger, K.

    2007-01-01

    Concentrating solar power (CSP) technologies use large mirrors to collect sunlight to convert thermal energy to electricity. The viability of CSP systems requires the development of advanced reflector materials that are low in cost and maintain high specular reflectance for extended lifetimes under severe outdoor environments. The long-standing goals for a solar reflector are specular reflectance above 90% into a 4 mrad half-cone angle for at least 10 years outdoors with a cost of less than $13.8/m{sup 2} (the 1992 $10.8/m{sup 2} goal corrected for inflation to 2002 dollars) when manufactured in large volumes. Durability testing of a variety of candidate solar reflector materials at outdoor test sites and in laboratory accelerated weathering chambers is the main activity within the Advanced Materials task of the CSP Program at the National Renewable Energy Laboratory (NREL) in Golden, Colorado. Test results to date for several candidate solar reflector materials will be presented. These include the optical durability of thin glass, thick glass, aluminized reflectors, front-surface mirrors, and silvered polymer mirrors. The development, performance, and durability of these materials will be discussed. Based on accelerated exposure testing the glass, silvered polymer, and front-surface mirrors may meet the 10 year lifetime goals, but at this time because of significant process changes none of the commercially available solar reflectors and advanced solar reflectors have demonstrated the 10 year or more aggressive 20 year lifetime goal.

  13. Solar energy collector

    DOE Patents [OSTI]

    Brin, Raymond L. (Cedar Crest, NM); Pace, Thomas L. (Albuquerque, NM)

    1978-01-01

    The invention relates to a solar energy collector comprising solar energy absorbing material within chamber having a transparent wall, solar energy being transmitted through the transparent wall, and efficiently absorbed by the absorbing material, for transfer to a heat transfer fluid. The solar energy absorbing material, of generally foraminous nature, absorbs and transmits the solar energy with improved efficiency.

  14. Solar Innovator | Alta Devices

    ScienceCinema (OSTI)

    Mattos, Laila; Le, Minh

    2013-05-29

    Selected to participate in the Energy Department's SunShot Initiative, Alta Devices produces solar cells that convert sunlight into electricity at world record-breaking levels of efficiency. Through its innovative solar technology Alta is helping bring down the cost of solar. Learn more about the Energy Department's efforts to advance solar technology at energy.gov/solar .

  15. Solar Innovator | Alta Devices

    SciTech Connect (OSTI)

    Mattos, Laila; Le, Minh

    2012-01-01

    Selected to participate in the Energy Department's SunShot Initiative, Alta Devices produces solar cells that convert sunlight into electricity at world record-breaking levels of efficiency. Through its innovative solar technology Alta is helping bring down the cost of solar. Learn more about the Energy Department's efforts to advance solar technology at energy.gov/solar .

  16. Solar neutrinos and the solar composition problem

    E-Print Network [OSTI]

    Carlos Pena-Garay; Aldo Serenelli

    2008-11-16

    Standard solar models (SSM) are facing nowadays a new puzzle: the solar composition problem. New determinations of solar metal abundances lead SSM calculations to conflict with helioseismological measurements, showing discrepancies that extend from the convection zone to the solar core and can not be easily assigned to deficiencies in the modelling of the solar convection zone. We present updated solar neutrino fluxes and uncertainties for two SSM with high (old) and low (new) solar metallicity determinations. The uncertainties in iron and carbon abundances are the largest contribution to the uncertainties of the solar neutrino fluxes. The uncertainty on the ^14N+p -> ^15O+g rate is the largest of the non-composition uncertainties to the CNO neutrino fluxes. We propose an independent method to help identify which SSM is the correct one. Present neutrino data can not distinguish the solar neutrino predictions of both models but ongoing measurements can help to solve the puzzle.

  17. Solar Circuitry

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effect Photovoltaics -7541 *ImpactScience of SignaturesSoft0 Soils SoilSolar

  18. Solar Power

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effect Photovoltaics -7541 *ImpactScience(TechnicalFor Milwaukee, BySoft Solar Power

  19. Organic Tandem Solar Cells: Design and Formation

    E-Print Network [OSTI]

    Chen, Chun-Chao

    2015-01-01

    grids,? Solar Energy Materials and Solar Cells, 2011, 95(5),layer,? Solar Energy Materials and Solar Cells, 2013, 113,thickness,? Solar Energy Materials and Solar Cells, 2013,

  20. Organic Tandem Solar Cells: Design and Formation

    E-Print Network [OSTI]

    Chen, Chun-Chao

    2015-01-01

    grids,? Solar Energy Materials and Solar Cells, 2011, 95(5),thickness,? Solar Energy Materials and Solar Cells, 2013,analysis,? Solar Energy Materials and Solar Cells, [130] J.