National Library of Energy BETA

Sample records for high concentration pv

  1. DOE High Performance Concentrator PV Project

    SciTech Connect (OSTI)

    McConnell, R.; Symko-Davies, M.

    2005-08-01

    Much in demand are next-generation photovoltaic (PV) technologies that can be used economically to make a large-scale impact on world electricity production. The U.S. Department of Energy (DOE) initiated the High-Performance Photovoltaic (HiPerf PV) Project to substantially increase the viability of PV for cost-competitive applications so that PV can contribute significantly to both our energy supply and environment. To accomplish such results, the National Center for Photovoltaics (NCPV) directs in-house and subcontracted research in high-performance polycrystalline thin-film and multijunction concentrator devices with the goal of enabling progress of high-efficiency technologies toward commercial-prototype products. We will describe the details of the subcontractor and in-house progress in exploring and accelerating pathways of III-V multijunction concentrator solar cells and systems toward their long-term goals. By 2020, we anticipate that this project will have demonstrated 33% system efficiency and a system price of $1.00/Wp for concentrator PV systems using III-V multijunction solar cells with efficiencies over 41%.

  2. Low Cost High Concentration PV Systems for Utility Power Generation |

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

    Department of Energy Low Cost High Concentration PV Systems for Utility Power Generation An overview of the Low Cost High Concentration PV Systems for Utility Power Generation project to transition Amonix's concentrating photovoltaic (PV) systems from low-volume to high-volume production. PDF icon Low Cost High Concentration PV Systems for Utility Power Generation More Documents & Publications Solar America Initiative Low Cost High Concentration PV Systems for Utility Power Generation

  3. Low Cost High Concentration PV Systems for Utility Power Generation Amonix,

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

    Inc. | Department of Energy Amonix, Inc. Low Cost High Concentration PV Systems for Utility Power Generation Amonix, Inc. A series of brief fact sheet on various topics including:Low Cost High Concentration PV Systems for Utility Power Generation,High Efficiency Concentrating Photovoltaic Power System,Reaching Grid Parity Using BP Solar Crystalline Silicon Technology, Fully Integrated Building Science Solutions for Residential and Commercial Photovoltaic Energy Generation,A Value Chain

  4. Low Cost High Concentration PV Systems for Utility Power Generation...

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

    Efficiency Concentrating Photovoltaic Power System,Reaching Grid Parity ... for Residential and Commercial Photovoltaic Energy Generation,A Value Chain ...

  5. National solar technology roadmap: Concentrator PV

    SciTech Connect (OSTI)

    Friedman, Dan

    2007-06-01

    This roadmap addresses high-concentration (>10x) photovoltaic (PV) systems, incorporating high-efficiency III-V or silicon cells, trackers, and reflective or refractive optics.

  6. Bottom-Up Cost Analysis of a High Concentration PV Module; NREL (National Renewable Energy Laboratory)

    SciTech Connect (OSTI)

    Horowitz, K.; Woodhouse, M.; Lee, H.; Smestad, G.

    2015-04-13

    We present a bottom-up model of III-V multi-junction cells, as well as a high concentration PV (HCPV) module. We calculate $0.65/Wp(DC) manufacturing costs for our model HCPV module design with today’s capabilities, and find that reducing cell costs and increasing module efficiency offer the promising pathways for future cost reductions. Cell costs could be significantly reduced via an increase in manufacturing scale, substrate reuse, and improved manufacturing yields. We also identify several other significant drivers of HCPV module costs, including the Fresnel lens primary optic, module housing, thermal management, and the receiver board. These costs could potentially be lowered by employing innovative module designs.

  7. Identifying Critical Pathways to High-Performance PV: Preprint

    SciTech Connect (OSTI)

    Symko-Davies, M.; Noufi, R.; Kurtz, S.

    2002-05-01

    This conference paper describes the High-Performance Photovoltaic (HiPerf PV)Project was initiated by the U.S. Department of Energy to substantially increase the viability of photovoltaics (PV) for cost-competitive applications so that PV can contribute significantly to our energy supply and our environment in the 21st century. To accomplish this, the NCPV directs in-house and subcontracted research in high-performance polycrystalline thin-film and multijunction concentrator devices. Details of the subcontractor and in-house progress will be described toward identifying critical pathways of 25% polycrystalline thin-film tandem cells and developing multijunction concentrator modules to 33%.

  8. Status of High Performance PV: Polycrystalline Thin-Film Tandems

    SciTech Connect (OSTI)

    Symko-Davies, M.

    2005-02-01

    The High-Performance Photovoltaic (HiPerf PV) Project was initiated by the U.S. Department of Energy to substantially increase the viability of photovoltaics (PV) for cost-competitive applications so that PV can contribute significantly to our energy supply and our environment. The HiPerf PV Project aims at exploring the ultimate performance limits of existing PV technologies, approximately doubling their sunlight-to-electricity conversion efficiencies during its course. This work includes bringing thin-film cells and modules toward 25% and 20% efficiencies, respectively, and developing multijunction concentrator cells and modules able to convert more than one-third of the sun's energy to electricity (i.e., 33% efficiency). This paper will address recent accomplishments of the NREL in-house research effort involving polycrystalline thin-film tandems, as well as the research efforts under way in the subcontracted area.

  9. Kauai, Hawaii: Solar Resource Analysis and High-Penetration PV...

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

    Kauai, Hawaii: Solar Resource Analysis and High-Penetration PV Potential Kauai, Hawaii: ... This study looks at the technical feasibility of generating power with PV arrays. PDF icon ...

  10. High-Penetration PV with Advanced Power Conditioning Systems | Department

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

    of Energy High-Penetration PV with Advanced Power Conditioning Systems High-Penetration PV with Advanced Power Conditioning Systems va tech logo2.jpg -- This project is inactive -- Virginia Polytechnic Institute and State University (VT) is evaluating the impacts of high photovoltaic (PV) penetration and methods to manage any impacts with improved power conditioning equipment. APPROACH The team's combined approach is to verify and demonstrate existing and new high-penetration level PV

  11. High Resolution PV Power Modeling for Distribution Circuit Analysis

    SciTech Connect (OSTI)

    Norris, B. L.; Dise, J. H.

    2013-09-01

    NREL has contracted with Clean Power Research to provide 1-minute simulation datasets of PV systems located at three high penetration distribution feeders in the service territory of Southern California Edison (SCE): Porterville, Palmdale, and Fontana, California. The resulting PV simulations will be used to separately model the electrical circuits to determine the impacts of PV on circuit operations.

  12. Concentrating Photovoltaics: Collaborative Opportunities within DOEs CSP and PV Programs; Preprint

    SciTech Connect (OSTI)

    Mehos, M.; Lewandowski, A.; Symko-Davies, M.; Kurtz, S.

    2001-10-01

    Presented at the 2001 NCPV Program Review Meeting: DOEs Concentrating Solar Power program is investigating the viability of concentrating PV converters as an alternative to thermal conversion devices.

  13. Water Impacts of High Solar PV Electricity Penetration

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

    Water Impacts of High Solar PV Electricity Penetration Jordan Macknick and Stuart Cohen National Renewable Energy Laboratory (NREL) Technical Report NRELTP-6A20-63011 September...

  14. NREL: Photovoltaics Research - NREL Releases High-Penetration PV Handbook

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

    for Distribution Engineers Releases High-Penetration PV Handbook for Distribution Engineers A new resource sponsored by the Energy Department's SunShot Initiative helps distribution engineers understand the challenges of high-penetration PV integration. January 27, 2016 As solar photovoltaic (PV) systems are increasingly installed throughout the country at distribution-level utility scale, a new challenge is emerging: how to safely and effectively integrate greater amounts of variable solar

  15. NREL: Energy Systems Integration - NREL Releases High-Penetration PV

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

    Handbook for Distribution Engineers Releases High-Penetration PV Handbook for Distribution Engineers A new resource sponsored by the Energy Department's SunShot Initiative helps distribution engineers understand the challenges of high-penetration PV integration. January 27, 2016 As solar photovoltaic (PV) systems are increasingly installed throughout the country at distribution-level utility scale, a new challenge is emerging: how to safely and effectively integrate greater amounts of

  16. PV Solar Site Assessment (Milwaukee High School)

    Broader source: Energy.gov [DOE]

    The purpose of this assessment is to provide site-specific information on how a solar electric (also referred to as a photovoltaic, or PV) system would perform at your location, including information on estimated physical size, rated output, energy production, costs, financial incentives and mounting options. Site assessors are required to present unbiased information and may not recommend contractors or products.

  17. Modeling and Analysis of High-Penetration PV in California

    Broader source: Energy.gov [DOE]

    The NREL project team will utilize field verification to improve the ability to model and understand the impacts of high-penetration PV on electric utility systems and develop solutions to ease...

  18. Modeling and Analysis of High-Penetration PV in Florida

    Broader source: Energy.gov [DOE]

    This project aims to leverage simulation-assisted research and development based on a wide variety of Florida feeders that already incorporate high levels of PV power. Working with utilities, the...

  19. Integrating High Penetrations of PV into Southern California

    SciTech Connect (OSTI)

    Kroposki, B.; Mather, B.; Hasper-Tuttle, J.; Neal, R.; Katiraei, F.; Yazdani, A.; Aguero, J. R.; Hoff, T. E.; Norris, B. L.; Parkins, A.; Seguin, R.; Schauder, C.

    2011-01-01

    California regulators recently approved a plan proposed by Southern California Edison (SCE) to install 500 MW of distributed photovoltaic (PV) energy in its utility service territory over the next 5 years. The installations will include 250 MW of utility-owned solar and 250 MW of independently owned solar. SCE expects that the majority of these systems will be commercial-scale rooftop PV systems connected at various points in the distribution system. Each of the SCE rooftop PV systems will typically have a rating of 1-3 MW. To understand the impact of high-penetration PV on the distribution grid, the National Renewable Energy Laboratory (NREL) and SCE brought together a team of experts in resource assessment, distribution modeling, and planning to help analyze the impacts of adding high penetration of PV into the distribution system. Through modeling and simulation, laboratory testing, and field demonstrations, the team will address the issues identified in the analysis by fully examining the challenges, developing solutions, and transitioning those solutions to the field for large-scale deployment. This paper gives an update on the project and discusses technical results of integrating a large number of distributed PV systems into the grid.

  20. Progress in High-Performance PV: Polycrystalline Thin-Film Tandem Cells

    SciTech Connect (OSTI)

    Symko-Davies, M.

    2004-08-01

    The High-Performance Photovoltaic (HiPerf PV) Project was initiated by the U.S. Department of Energy to substantially increase the viability of PV for cost-competitive applications. The goal is that PV will contribute significantly to the U.S. and world energy supply and environmental enhancement in the 21st century. The HiPerf PV Project aims at exploring the ultimate performance limits of existing PV technologies, approximately doubling their sunlight-to-electricity conversion efficiencies during its course, to accelerate and enhance their impact in the marketplace. To accomplish this, the National Center for Photovoltaics (NCPV) directs in-house and subcontracted research in high-performance polycrystalline thin-film and multijunction concentrator devices. This paper will describe progress of the subcontractor and in-house R&D on critical pathways for a PV technology having a high potential to reach cost-competitiveness goals: 25%-efficient, low-cost polycrystalline thin-film tandems for large-area, flat-plate modules.

  1. Recent developments in high-efficiency PV cells

    SciTech Connect (OSTI)

    Deb, S.

    2000-05-22

    Enormous progress has been made in recent years on a number of photovoltaic (PV) materials and devices in terms of conversion efficiencies. Ultrahigh-efficiency (>30{percent}) PV cells have been fabricated from gallium arsenide (GaAs) and its ternary alloys such as gallium indium phosphide (GaInP{sub 2}). The high-efficiency GaAs-based solar cells are being produced on a commercial scale, particularly for space applications. Efficiencies in the range of 18{percent} to 24{percent} have been achieved in traditional silicon-based devices fabricated from both multicrystalline and single-crystal materials. Major advances in efficiency have also been made on various thin-film solar cells based on amorphous silicon (aSi:H), copper gallium indium diselenide (CIGS), and cadmium telluride materials. This paper gives a brief overview of the recent progress in PV cell efficiencies based on these materials and devices.

  2. Long-Term Modeling of Solar Energy: Analysis of Concentrating Solar Power (CSP) and PV Technologies

    SciTech Connect (OSTI)

    Zhang, Yabei; Smith, Steven J.

    2007-08-16

    This report presents an overview of research conducted on solar energy technologies and their implementation in the ObjECTS framework. The topics covered include financing assumptions and selected issues related to the integration of concentrating thermal solar power (CSP) and photovoltaics PV technologies into the electric grid. A review of methodologies for calculating the levelized energy cost of capital-intensive technologies is presented, along with sensitivity tests illustrating how the cost of a solar plant would vary depending on financing assumptions. An analysis of the integration of a hybrid concentrating thermal solar power (CSP) system into the electric system is conducted. Finally a failure statistics analysis for PV plants illustrates the central role of solar irradiance uncertainty in determining PV grid integration characteristics.

  3. High-Penetration PV Integration Handbook for Distribution Engineers

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

    NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency & Renewable Energy Operated by the Alliance for Sustainable Energy, LLC This report is available at no cost from the National Renewable Energy Laboratory (NREL) at www.nrel.gov/publications. Contract No. DE-AC36-08GO28308 High-Penetration PV Integration Handbook for Distribution Engineers Rich Seguin, Jeremy Woyak, David Costyk, and Josh Hambrick Electrical Distribution Design Barry Mather National

  4. High-Penetration PV Integration Handbook for Distribution Engineers

    SciTech Connect (OSTI)

    Seguin, Rich; Woyak, Jeremy; Costyk, David; Hambrick, Josh; Mather, Barry

    2016-01-01

    This handbook has been developed as part of a five-year research project which began in 2010. The National Renewable Energy Laboratory (NREL), Southern California Edison (SCE), Quanta Technology, Satcon Technology Corporation, Electrical Distribution Design (EDD), and Clean Power Research (CPR) teamed together to analyze the impacts of high-penetration levels of photovoltaic (PV) systems interconnected onto the SCE distribution system. This project was designed specifically to leverage the experience that SCE and the project team would gain during the significant installation of 500 MW of commercial scale PV systems (1-5 MW typically) starting in 2010 and completing in 2015 within SCE’s service territory through a program approved by the California Public Utility Commission (CPUC).

  5. Integrating High Penetrations of PV into Southern California: Year 2 Project Update; Preprint

    SciTech Connect (OSTI)

    Mather, B.; Neal, R.

    2012-08-01

    Southern California Edison (SCE) is well into a five-year project to install a total of 500 MW of distributed photovoltaic (PV) energy within its utility service territory. Typical installations to date are 1-3 MW peak rooftop PV systems that interconnect to medium-voltage urban distribution circuits or larger (5 MW peak) ground-mounted systems that connect to medium-voltage rural distribution circuits. Some of the PV system interconnections have resulted in distribution circuits that have a significant amount of PV generation compared to customer load, resulting in high-penetration PV integration scenarios. The National Renewable Energy Laboratory (NREL) and SCE have assembled a team of distribution modeling, resource assessment, and PV inverter technology experts in order to investigate a few of the high-penetration PV distribution circuits. Currently, the distribution circuits being studied include an urban circuit with a PV penetration of approximately 46% and a rural circuit with a PV penetration of approximately 60%. In both cases, power flow on the circuit reverses direction, compared to traditional circuit operation, during periods of high PV power production and low circuit loading. Research efforts during year two of the five-year project were focused on modeling the distribution system level impacts of high-penetration PV integrations, the development and installation of distribution circuit data acquisition equipment appropriate for quantifying the impacts of high-penetration PV integrations, and investigating high-penetration PV impact mitigation strategies. This paper outlines these research efforts and discusses the following activities in more detail: the development of a quasi-static time-series test feeder for evaluating high-penetration PV integration modeling tools; the advanced inverter functions being investigated for deployment in the project's field demonstration and a power hardware-in-loop test of a 500-kW PV inverter implementing a limited set of advanced inverter functions.

  6. High Penetration PV: How High Can We Go?

    SciTech Connect (OSTI)

    2016-01-01

    Brochure highlighting NREL's partnership with SolarCity and Hawaiian Electric (HECO) to increase the penetration of solar photovoltaics on the electricity grid. To better understand the potential impact of transient overvoltages due to load rejection, NREL collaborated with SolarCity and HECO to run a series of tests measuring the magnitude and duration of load rejection overvoltage events and demonstrating the ability of advanced PV inverters to mitigate their impacts.

  7. Final Report- High Penetration Solar PV Deployment Sunshine State...

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

    and released, along with synthetic solar PV data sets, and tools and techniques for model ... (2010-2014) - September 2012 Update Energy Storage Systems 2010 Update Conference ...

  8. Kauai, Hawaii: Solar Resource Analysis and High-Penetration PV Potential |

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

    Department of Energy Kauai, Hawaii: Solar Resource Analysis and High-Penetration PV Potential Kauai, Hawaii: Solar Resource Analysis and High-Penetration PV Potential This study looks at the technical feasibility of generating power with PV arrays. PDF icon 47956.pdf More Documents & Publications Renewable Power Options for Electricity Generation on Kaua'i: Economics and Performance Modeling Identifying Cost-Effective Residential Energy Efficiency Opportunities for the Kauai Island

  9. NREL: Solar Research - NREL Releases High-Penetration PV Handbook for

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

    Distribution Engineers Releases High-Penetration PV Handbook for Distribution Engineers A new resource sponsored by the Energy Department's SunShot Initiative helps distribution engineers understand the challenges of high-penetration PV integration. January 27, 2016 As solar photovoltaic (PV) systems are increasingly installed throughout the country at distribution-level utility scale, a new challenge is emerging: how to safely and effectively integrate greater amounts of variable solar

  10. Water Impacts of High Solar PV Electricity Penetration

    SciTech Connect (OSTI)

    Macknick, Jordan; Cohen, Stuart

    2015-09-01

    This analysis provides a detailed national and regional description of the water-related impacts and constraints of high solar electricity penetration scenarios in the U.S. in 2030 and 2050. A modified version of the Regional Energy Deployment System (ReEDS) model that incorporates water resource availability and costs as a constraint in each of its 134 Balancing Area (BA) regions was utilized to explore national and regional differences in water use impacts and solar deployment locations under different solar energy cost and water availability scenarios (Macknick et al. 2015). Water resource availability and cost data are from recently completed research at Sandia National Laboratories (Tidwell et al. 2013a). Scenarios analyzed include two business-as-usual solar energy cost cases, one with and one without considering available water resources, and four solar energy cost cases that meet the SunShot cost goals (i.e., $1/watt for utility-scale PV systems), with varying levels of water availability restrictions. This analysis provides insight into the role solar energy technologies have in the broader electricity sector under scenarios of water constraints.

  11. Highly Efficient 32.3% Monolithic GaInP/GaAs/Ge Triple Junction Concentrator Solar Cells

    SciTech Connect (OSTI)

    Cotal, H. L.; Lillington, D. R.; Ermer, J. H.; King, R. R.; Karam, N. H.; Kurtz, S. R.; Friedman, D. J.; Olson, J. M.; Ward, S.; Duda, A.; Emery, K. A.; Moriarty, T.

    2000-01-01

    Based on recent cell improvements for space applications, multijunction cells apear to be ideal candidates for high efficiency, cost effective, PV concentrator systems.

  12. Advanced Inverter Technology for High Penetration Levels of PV Generation in Distribution Systems

    SciTech Connect (OSTI)

    Schauder, C.

    2014-03-01

    This subcontract report was completed under the auspices of the NREL/SCE High-Penetration Photovoltaic (PV) Integration Project, which is co-funded by the U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE) and the California Solar Initiative (CSI) Research, Development, Demonstration, and Deployment (RD&D) program funded by the California Public Utility Commission (CPUC) and managed by Itron. This project is focused on modeling, quantifying, and mitigating the impacts of large utility-scale PV systems (generally 1-5 MW in size) that are interconnected to the distribution system. This report discusses the concerns utilities have when interconnecting large PV systems that interconnect using PV inverters (a specific application of frequency converters). Additionally, a number of capabilities of PV inverters are described that could be implemented to mitigate the distribution system-level impacts of high-penetration PV integration. Finally, the main issues that need to be addressed to ease the interconnection of large PV systems to the distribution system are presented.

  13. Kauai, Hawaii: Solar Resource Analysis and High Penetration PV Potential

    SciTech Connect (OSTI)

    Helm, C.; Burman, K.

    2010-04-01

    Overview of the solar resource assessment conducted by the National Renewable Energy Laboratory (NREL) in cooperation with Kauai Island Utility Cooperative (KIUC) in Hawaii to determine the technical feasibility of increasing the contribution of solar renewable energy generation on the island of Kauaii through the use of photovoltaic (PV) arrays. The analysis, which was performed using a custom version of NREL's In My Back Yard (IMBY) software tool, showed that there is potential to generate enough energy to cover the peak load as reported for Kauai in 2007.

  14. NREL/SCE High-Penetration PV Integration Project: Report on Field Demonstration of Advanced Inverter Functionality in Fontana, CA

    SciTech Connect (OSTI)

    Mather, B.

    2014-08-01

    The National Renewable Energy Laboratory/Southern California Edison High-Penetration PV Integration Project is (1) researching the distribution system level impacts of high-penetration photovoltaic (PV) integration, (2) determining mitigation methods to reduce or eliminate those impacts, and (3) seeking to demonstrate these mitigation methods on actual high-penetration PV distribution circuits. This report describes a field demonstration completed during the fall of 2013 on the Fontana, California, study circuit, which includes a total of 4.5 MW of interconnected utility-scale rooftop PV systems. The demonstration included operating a 2-MW PV system at an off-unity power factor that had been determined during previously completed distribution system modeling and PV impact assessment analyses. Data on the distribution circuit and PV system operations were collected during the 2-week demonstration period. This demonstration reinforces the findings of previous laboratory testing that showed that utility-scale PV inverters are capable of operating at off-unity power factor to mitigate PV impacts; however, because of difficulties setting and retaining PV inverter power factor set points during the field demonstration, it was not possible to demonstrate the effectiveness of off-unity power factor operation to mitigate the voltage impacts of high-penetration PV integration. Lessons learned from this field demonstration are presented to inform future field demonstration efforts.

  15. High-Penetration PV Deployment in the Arizona Public Service System, Phase 1 Update: Preprint

    SciTech Connect (OSTI)

    Hambrick, J.; Narang, D.

    2012-06-01

    In an effort to better understand the impacts of high penetrations of photovoltaic generators on distribution systems, Arizona Public Service and its partners have begun work on a multi-year project to develop the tools and knowledge base needed to safely and reliably integrate high penetrations of utility- and residential-scale photovoltaics (PV). Building upon the APS Community Power Project -- Flagstaff Pilot, this project will analyze the impact of PV on a representative feeder in northeast Flagstaff. To quantify and catalog the effects of the estimated 1.3 MW of PV that will be installed on the feeder (both smaller units at homes as well as large, centrally located systems), high-speed weather and electrical data acquisition systems and digital 'smart' meters are being designed and installed to facilitate monitoring and to build and validate comprehensive, high-resolution models of the distribution system. These models will be used to analyze the impacts of the PV on distribution circuit protection systems (including anti-islanding), predict voltage regulation and phase balance issues, and develop volt/var control schemes. This paper continues from a paper presented at the 2011 IEEE PVSC conference that introduces the project and describes some of the preliminary consideration, as well as project plans and early results. This paper gives a status update of the project and presents selected results from Phase 2 of the project. It discusses baseline feeder modeling, load allocation, data acquisition, utility-scale PV integration, preliminary model validation, and plans for future phases.

  16. Analysis of the Impacts of Distribution-Connected PV Using High-Speed Data Sets: Preprint

    SciTech Connect (OSTI)

    Bank, J.; Mather, B.

    2013-03-01

    This paper, presented at the IEEE Green Technologies Conference 2013, utilizes information from high resolution data acquisition systems developed at the National Renewable Energy Laboratory and deployed on a high-penetration PV distribution system to analyze the variability of different electrical parameters. High-resolution solar irradiance data is also available in the same area which is used to characterize the available resource and how it affects the electrical characteristics of the study circuit. This paper takes a data-driven look at the variability caused by load and compares those results against times when significant PV production is present. Comparisons between the variability in system load and the variability of distributed PV generation are made.

  17. High Penetration of Photovoltaic (PV) Systems into the Distribution Grid, Workshop Report, February 24-25, 2009

    SciTech Connect (OSTI)

    Not Available

    2009-06-01

    Outcomes from the EERE Solar Energy Technologies Program workshop on high penetration of photovoltaic (PV) systems into the distribution grid, Feb. 24-25, 2009, Ontario, Calif.

  18. Equipment Loan for Concentrated PV Cavity Converter (PVCC) Research: Cooperative Research and Development Final Report, CRADA Number CRD-08-285

    SciTech Connect (OSTI)

    Netter, Judy

    2015-07-28

    Interest in High Concentration Photovoltaics (HCPV) for terrestrial applications has significantly grown in recent years. A major driver behind this growth trend is the availability of high efficiency multi-junction (MJ) cells that promise reliable operation under high concentrations (500 to 1000 suns). The primary impact of HCPV on the solar electricity cost is the dramatic reduction in cell cost. For terrestrial HCPV systems, operating at concentrations ≥ 500 suns, the expensive MJ cells are marginally affordable. Most recently, triple-junction test cells have achieved a conversion efficiency of over 40% under concentrated sunlight. Photovoltaic Cavity Converter (PVCC) is a multi-bandgap, high concentration PV device developed by United Innovations, Inc., under subcontract to NREL. The lateral- (2- dimensional) structure of PVCC, as opposed to vertical multi-junction (MJ) structure, helps to circumvent most of the developmental challenges MJ technology has yet to overcome. This CRADA will allow the continued development of this technology by United Innovations. This project was funded by the California Energy Commission and is the second phase of a twopart demonstration program. The key advantage of the design was the use of a PVCC as the receiver. PVCCs efficiently process highly concentrated solar radiation into electricity by recycling photons that are reflected from the surface of the cells. Conventional flat, twodimensional receivers cannot recycle photons and the reflected photons are lost to the conversion process.

  19. PROJECT PROFILE: Combined PV/Battery Grid Integration with High...

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

    PROJECT PROFILE: Combined PVBattery Grid Integration with High Frequency Magnetics Enabled Power Electronics (SuNLaMP) PROJECT PROFILE: Combined PVBattery Grid Integration with ...

  20. NREL/SCE High Penetration PV Integration Project: FY13 Annual Report

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

    NREL/SCE High Penetration PV Integration Project: FY13 Annual Report Barry A. Mather National Renewable Energy Laboratory Sunil Shah Southern California Edison Benjamin L. Norris and John H. Dise Clean Power Research Li Yu, Dominic Paradis, and Farid Katiraei Quanta Technology Richard Seguin, David Costyk, Jeremy Woyak, Jaesung Jung, Kevin Russell, and Robert Broadwater Electrical Distribution Design, Inc. Technical Report NREL/TP-5D00-61269 June 2014 NREL is a national laboratory of the U.S.

  1. NREL/SCE High Penetration PV Integration Project: FY13 Annual Report

    SciTech Connect (OSTI)

    Mather, B. A.; Shah, S.; Norris, B. L.; Dise, J. H.; Yu, L.; Paradis, D.; Katiraei, F.; Seguin, R.; Costyk, D.; Woyak, J.; Jung, J.; Russell, K.; Broadwater, R.

    2014-06-01

    In 2010, the National Renewable Energy Laboratory (NREL), Southern California Edison (SCE), Quanta Technology, Satcon Technology Corporation, Electrical Distribution Design (EDD), and Clean Power Research (CPR) teamed to analyze the impacts of high penetration levels of photovoltaic (PV) systems interconnected onto the SCE distribution system. This project was designed specifically to benefit from the experience that SCE and the project team would gain during the installation of 500 megawatts (MW) of utility-scale PV systems (with 1-5 MW typical ratings) starting in 2010 and completing in 2015 within SCE's service territory through a program approved by the California Public Utility Commission (CPUC). This report provides the findings of the research completed under the project to date.

  2. A High Power Density DC-DC Converter for Distributed PV Architectures

    SciTech Connect (OSTI)

    Mohammed S. Agamy; Song Chi; Ahmed Elasser; Maja Harfman-Todorovic; Yan Jiang; Frank Mueller; Fengfeng Tao

    2012-06-01

    In order to maximize solar energy harvesting capabilities, power converters have to be designed for high efficiency and good MPPT and voltage/current performance. When many converters are used in distributed systems, power density also becomes an important factor as it allows for simpler system integration. In this paper a high power density string dc-dc converter suitable for distributed medium to large scale PV installation is presented. A simple partial power processing topology, implemented with all silicon carbide devices provides high efficiency as well as high power density. A 3.5kW, 100kHz converter is designed and tested to verify the proposed methods.

  3. Tools for Enhanced Grid Operation and Optimized PV Penetration Utilizing Highly Distributed Sensor Data.

    SciTech Connect (OSTI)

    Reno, Matthew J.; Peppanen, Jouni; Seuss, John; Lave, Matthew Samuel; Broderick, Robert Joseph; Grijalva, Santiago

    2015-11-01

    Increasing number s of PV on distribution systems are creating more grid impacts , but it also provides more opportunities for measurement, sensing, and control of the grid in a distributed fashion. This report demonstrates three software tools for characterizing and controlling distribution feeders by utilizing large numbers of highly distributed current, voltage , and irradiance sensors. Instructions and a user manual is presented for each tool. First, the tool for distribution system secondary circuit parameter estimation is presented. This tool allows studying distribution system parameter estimation accuracy with user-selected active power, reactive power, and voltage measurements and measurement error levels. Second, the tool for multi-objective inverter control is shown. Various PV inverter control strategies can be selected to objectively compare their impact on the feeder. Third, the tool for energy storage for PV ramp rate smoothing is presented. The tool allows the user to select different storage characteristics (power and energy ratings) and control types (local vs. centralized) to study the tradeoffs between state-of-charge (SOC) management and the amount of ramp rate smoothing.

  4. Multijunction Photovoltaic Technologies for High-Performance Concentrators

    SciTech Connect (OSTI)

    McConnell, R.; Symko-Davies, M.

    2006-01-01

    Multijunction solar cells provide high-performance technology pathways leading to potentially low-cost electricity generated from concentrated sunlight. The National Center for Photovoltaics at the National Renewable Energy Laboratory has funded different III-V multijunction solar cell technologies and various solar concentration approaches. Within this group of projects, III-V solar cell efficiencies of 41% are close at hand and will likely be reported in these conference proceedings. Companies with well-developed solar concentrator structures foresee installed system costs of $3/watt--half of today's costs--within the next 2 to 5 years as these high-efficiency photovoltaic technologies are incorporated into their concentrator photovoltaic systems. These technology improvements are timely as new large-scale multi-megawatt markets, appropriate for high performance PV concentrators, open around the world.

  5. Multijunction Photovoltaic Technologies for High-Performance Concentrators: Preprint

    SciTech Connect (OSTI)

    McConnell, R.; Symko-Davies, M.

    2006-05-01

    Multijunction solar cells provide high-performance technology pathways leading to potentially low-cost electricity generated from concentrated sunlight. The National Center for Photovoltaics at the National Renewable Energy Laboratory has funded different III-V multijunction solar cell technologies and various solar concentration approaches. Within this group of projects, III-V solar cell efficiencies of 41% are close at hand and will likely be reported in these conference proceedings. Companies with well-developed solar concentrator structures foresee installed system costs of $3/watt--half of today's costs--within the next 2 to 5 years as these high-efficiency photovoltaic technologies are incorporated into their concentrator photovoltaic systems. These technology improvements are timely as new large-scale multi-megawatt markets, appropriate for high performance PV concentrators, open around the world.

  6. High efficiency and high concentration in photovoltaics

    SciTech Connect (OSTI)

    Yamaguchi, Masafumi; Luque, A.

    1999-10-01

    In this paper, the authors present the state-of-the-art of multijunction solar cells and the future prospects of this technology. Their use in terrestrial applications will likely be for concentrators operating at very high concentrations. Some trends are also discussed and the authors present a cost calculation showing that highly efficient cells under very high concentration would be able to produce electricity at costs competitive with electricity generation costs for some utilities.

  7. Modelling acceptance of sunlight in high and low photovoltaic concentration

    SciTech Connect (OSTI)

    Leutz, Ralf

    2014-09-26

    A simple model incorporating linear radiation characteristics, along with the optical trains and geometrical concentration ratios of solar concentrators is presented with performance examples for optical trains of HCPV, LCPV and benchmark flat-plate PV.

  8. Analysis of concentrating PV-T systems for the commercial/industrial sector. Volume III. Technical issues and design guidance

    SciTech Connect (OSTI)

    Schwinkendorf, W.E.

    1984-09-01

    This report provide appropriate guidance for addressing the major technical issues associated with the design and installation of a photovoltaic-thermal (PV-T) system. Nomographs are presented for developing preliminary sizing and costing, and issues associated with specific components and the overall design of the electrical and mechanical system are discussed. SAND82-7157/2 presents a review of current PV-T technology and operating systems and a study of potential PV-T applications. Detailed PV-T system designs for three selected applications and the results of a trade-off study for these applications are presented in SAND82-7157/4. A summary of the major results of this entire study and conclusions concerning PV-T systems and applications is presented in SAND82-7157/1.

  9. Value Proposition for High Lifetime (p-type) and Thin Silicon Materials in Solar PV Applications: Preprint

    SciTech Connect (OSTI)

    Goodrich, A.; Woodhouse, M.; Hacke, P.

    2012-06-01

    Most silicon PV road maps forecast a continued reduction in wafer thickness, despite rapid declines in the primary incentive for doing so -- polysilicon feedstock price. Another common feature of most silicon-technology forecasts is the quest for ever-higher device performance at the lowest possible costs. The authors present data from device-performance and manufacturing- and system-installation cost models to quantitatively establish the incentives for manufacturers to pursue advanced (thin) wafer and (high efficiency) cell technologies, in an age of reduced feedstock prices. This analysis exhaustively considers the value proposition for high lifetime (p-type) silicon materials across the entire c-Si PV supply chain.

  10. PV Publications

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

    Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power ... System Model Calibration with Big Data from AMI and PV Inverters", in IEEE ...

  11. Non-tracking solar concentrator with a high concentration ratio

    DOE Patents [OSTI]

    Hinterberger, Henry

    1977-01-01

    A nontracking solar concentrator with a high concentration ratio is provided. The concentrator includes a plurality of energy absorbers which communicate with a main header by which absorbed heat is removed. Undesired heat flow of those absorbers not being heated by radiant energy at a particular instant is impeded, improving the efficiency of the concentrator.

  12. Lanai high-density irradiance sensor network for characterizing solar resource variability of MW-scale PV system.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Johnson, Lars; Ellis, Abraham; Kuszmaul, Scott S.

    2012-01-01

    Sandia National Laboratories (Sandia) and SunPower Corporation (SunPower) have completed design and deployment of an autonomous irradiance monitoring system based on wireless mesh communications and a battery operated data acquisition system. The Lanai High-Density Irradiance Sensor Network is comprised of 24 LI-COR{reg_sign} irradiance sensors (silicon pyranometers) polled by 19 RF Radios. The system was implemented with commercially available hardware and custom developed LabVIEW applications. The network of solar irradiance sensors was installed in January 2010 around the periphery and within the 1.2 MW ac La Ola PV plant on the island of Lanai, Hawaii. Data acquired at 1 second intervals is transmitted over wireless links to be time-stamped and recorded on SunPower data servers at the site for later analysis. The intent is to study power and solar resource data sets to correlate the movement of cloud shadows across the PV array and its effect on power output of the PV plant. The irradiance data sets recorded will be used to study the shape, size and velocity of cloud shadows. This data, along with time-correlated PV array output data, will support the development and validation of a PV performance model that can predict the short-term output characteristics (ramp rates) of PV systems of different sizes and designs. This analysis could also be used by the La Ola system operator to predict power ramp events and support the function of the future battery system. This experience could be used to validate short-term output forecasting methodologies.

  13. A Path to High-Concentration Luminescent Solar Concentrators

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

    Significance and Impact LSCs enable non-tracking concentration of both direct sunlight and diffuse light onto high- efficiency solar cells, and our work predicts unprecendented ...

  14. A High Efficiency DC-DC Converter Topology Suitable for Distributed Large Commercial and Utility Scale PV Systems

    SciTech Connect (OSTI)

    Mohammed S. Agamy; Maja Harfman-Todorovic; Ahmed Elasser; Robert L. Steigerwald; Juan A. Sabate; Song Chi; Adam J. McCann; Li Zhang; Frank Mueller

    2012-09-01

    In this paper a DC-DC power converter for distributed photovoltaic plant architectures is presented. The proposed converter has the advantages of simplicity, high efficiency, and low cost. High efficiency is achieved by having a portion of the input PV power directly fed forward to the output without being processed by the converter. The operation of this converter also allows for a simplified maximum power point tracker design using fewer measurements

  15. Terrestrial Concentrator PV Modules Based on GaInP/GaAs/Ge TJ Cells and Minilens Panels

    SciTech Connect (OSTI)

    Rumyantsev, V. D.; Sadchikov, N. A.; Chalov, A. E.; Ionova, E. A.; Friedman, D. J.; Glenn, G.

    2006-01-01

    This paper is a description of research activity in the field of cost-effective modules realizing the concept of very high solar concentration with small-aperture area Fresnel lenses and multijunction III-V cells. Structural simplicity and 'all-glass' design are the guiding principles of the corresponding development. The advanced concentrator modules are made with silicone Fresnel lens panels (from 8 up to 144 lenses, each lens is 4 times 4 cm{sup 2} in aperture area) with composite structure. GaInP/GaAs/Ge triple-junction cells with average efficiencies of 31.1 and 34.7% at 1000 suns were used for the modules. Conversion efficiency as high as 26.3% has been measured indoors in a test module using a newly developed large-area solar simulator.

  16. Final Technical Report - Recovery Act: Organic Coatings as Encapsulants for Low Cost, High Performance PV Modules

    SciTech Connect (OSTI)

    Stuart Hellring; Jiping Shao; James Poole

    2011-12-05

    The objective of this project was to evaluate the feasibility of utilizing PPG's commercial organic coatings systems as efficient, modernized encapsulants for low cost, high performance, thin film photovoltaic modules. Our hypothesis was that the combination of an anticorrosive coating with a more traditional barrier topcoat would mitigate many electrochemical processes that are now responsible for the significant portion of photovoltaic (PV) failures, thereby nullifying the extremely high moisture barrier requirements of currently used encapsulation technology. Nine commercially available metal primer coatings and six commercially available top coatings were selected for screening. Twenty-one different primer/top coat combinations were evaluated. The primer coatings were shown to be the major contributor to corrosion inhibition, adhesion, and barrier properties. Two primer coatings and one top coating were downselected for testing on specially-fabricated test modules. The coated test modules passed initial current leakage and insulation testing. Damp Heat testing of control modules showed visible corrosion to the bus bar metal, whereas the coated modules showed none. One of the primer/top coat combinations retained solar power performance after Damp Heat testing despite showing some delamination at the EVA/solar cell interface. Thermal Cycling and Humidity Freeze testing resulted in only one test module retaining its power performance. Failure modes depended on the particular primer/top coating combination used. Overall, this study demonstrated that a relatively thin primer/top coating has the potential to replace the potting film and backsheet in crystalline silicon-based photovoltaic modules. Positive signals were received from commercially available coatings developed for applications having performance requirements different from those required for photovoltaic modules. It is likely that future work to redesign and customize these coatings would result in a coating system meeting the requirements for photovoltaic module encapsulation.

  17. LANAI HIGH-DENSITY IRRADIANCE SENSOR NETWORK FOR CHARACTERIZING SOLAR RESOURCE VARIABILITY OF MW-SCALE PV SYSTEM

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

    LANAI HIGH-DENSITY IRRADIANCE SENSOR NETWORK FOR CHARACTERIZING SOLAR RESOURCE VARIABILITY OF MW-SCALE PV SYSTEM Scott Kuszamaul 1 , Abraham Ellis 1 , Joshua Stein 1 , and Lars Johnson 2 1 Sandia National Laboratories, Albuquerque, NM, USA 2 SunPower Corporation, Richmond, CA, USA ABSTRACT Sandia National Laboratories (Sandia) and SunPower Corporation (SunPower) have completed design and deployment of an autonomous irradiance monitoring system based on wireless mesh communications and a battery

  18. PROJECT PROFILE: Combined PV/Battery Grid Integration with High Frequency Magnetics Enabled Power Electronics (SuNLaMP)

    Broader source: Energy.gov [DOE]

    This project will develop new power electronics devices, systems, and materials to address power electronic and dispatchability challenges that result from connecting hundreds of gigawatts of solar energy onto the electricity grid. These devices will incorporate advanced high-frequency (HF) magnetics along with the latest wide bandgap silicon carbide (SiC) switches. This design enables cost-effective grid integration of PV while increasing its dispatchability.

  19. Combined Modular Pumped Hydro Energy Storage Plus Solar PV Proposal for Rio Rancho High School, New Mexico

    SciTech Connect (OSTI)

    Bibeault, Mark Leonide

    2015-08-25

    This is a proposal to locate a combined Modular Pumped Hydro (MPH) Energy Storage plus PV solar facility at Rio Rancho High School, NM. The facility will functionally provide electricity at night derived from renewable solar energy. Additionally the facility will provide STEM related educational opportunities for students and staff of the school, public community outreach, and validation of an energy storage approach applicable for the Nation (up to 1,000,000 kWh per installation). The proposal will summarize the nature of electricity, why energy storage is useful, present the combined MPH and solar PV production design, present how the actual design will be built and operated in a sustainable manner, how the project could be funded, and how the project could be used in STEM related activities.

  20. PV Controls Utility-Scale Demonstration Project

    SciTech Connect (OSTI)

    O'Neill, Barbara; Gevorgian, Vahan

    2015-10-14

    This presentation provides a high-level overview of the utility-scale PV controls demonstration project.

  1. PROJECT PROFILE: Enabling High Concentration Photovoltaics with...

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

    The efficiency and concentration of III-V multi-junction solar cells are essential to reduce the cost of high concentration photovoltaic systems (HCPV). This project will push the ...

  2. PROJECT PROFILE: Rapid QSTS Simulations for High-Resolution Comprehensive Assessment of Distributed PV Impacts (SuNLaMP)

    Broader source: Energy.gov [DOE]

    This project, led by Sandia National Laboratory and supported by the National Renewable Energy Laboratory, will accelerate Quasi Static Time Series (QSTS) simulation capabilities through the use of new and innovative methods for advanced time-series analysis. Currently, QSTS analysis is not commonly performed in photovoltaic (PV) interconnection studies because of the data requirements and computational burden. This project will address both of these issues by developing advanced QSTS methods that greatly reduce the required computational time and by developing high-proxy data sets.

  3. Phase II Final Project Report SBIR Project: "A High Efficiency PV to Hydrogen Energy System"

    SciTech Connect (OSTI)

    Slade, A; Turner, J; Stone, K; McConnell, R

    2008-09-02

    The innovative research conducted for this project contributed greatly to the understanding of generating low-cost hydrogen from solar energy. The projects research identified two highly leveraging and complementary pathways. The first pathway is to dramatically increase the efficiency of converting sunlight into electricity. Improving solar electric conversion efficiency directly increases hydrogen production. This project produced a world record efficiency for silicon solar cells and contributed to another world record efficiency for a solar concentrator module using multijunction solar cells. The projects literature review identified a second pathway in which wasted heat from the solar concentration process augments the electrolysis process generating hydrogen. One way to do this is to use a heat mirror that reflects the heat-producing infrared and transmits the visible spectrum to the solar cells; this also increases solar cell conversion efficiency. An economic analysis of this concept confirms that, if long-term concentrator photovoltaic (CPV) and solid-oxide electrolyzer cost goals can be achieved, hydrogen will be produced from solar energy cheaper than the cost of gasoline. The potential public benefits from this project are significant. The project has identified a potential energy source for the nations future electricity and transportation needs that is entirely home grown and carbon free. As CPV enter the nations utility markets, the opportunity for this approach to be successful is greatly increased. Amonix strongly recommends further exploration of this projects findings.

  4. Highly concentrated foam formulation for blast mitigation

    DOE Patents [OSTI]

    Tucker, Mark D.; Gao, Huizhen

    2010-12-14

    A highly concentrated foam formulation for blast suppression and dispersion mitigation for use in responding to a terrorism incident involving a radiological dispersion device. The foam formulation is more concentrated and more stable than the current blast suppression foam (AFC-380), which reduces the logistics burden on the user.

  5. PV Value®

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

    ... For appraisers, the inputs specific to PV in the Residential Green and Energy Efficient Addendum can be used as inputs to PV Value. Valuing a PV system is done using an income ...

  6. Sandia Energy - PV Value

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

    PV Value Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Solar Market Transformation PV Value PV ValueTara Camacho-Lopez2015-06-12T20:36:38+00:0...

  7. PV modules modelling

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

    Energy PVsyst Summary Losses in a PV system simulation may be: - Determined by specific models (shadings) - Interpretations of models (PV module behaviour) - User's parameter...

  8. Solar PV Incentive Programs

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

    Development Authority Solar PV Incentive Programs Presentation at NREL Webinar on ... 14 Research & Development: - New & Improved PV Panels - Reduced Costs of Balance of System ...

  9. Supported PV module assembly

    DOE Patents [OSTI]

    Mascolo, Gianluigi; Taggart, David F.; Botkin, Jonathan D.; Edgett, Christopher S.

    2013-10-15

    A supported PV assembly may include a PV module comprising a PV panel and PV module supports including module supports having a support surface supporting the module, a module registration member engaging the PV module to properly position the PV module on the module support, and a mounting element. In some embodiments the PV module registration members engage only the external surfaces of the PV modules at the corners. In some embodiments the assembly includes a wind deflector with ballast secured to a least one of the PV module supports and the wind deflector. An array of the assemblies can be secured to one another at their corners to prevent horizontal separation of the adjacent corners while permitting the PV modules to flex relative to one another so to permit the array of PV modules to follow a contour of the support surface.

  10. SunShot Solar PV | Department of Energy

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

    Solar PV SunShot Solar PV

  11. Development of Large High-Voltage PV Modules with Improved Reliability and Lower Cost: Final Subcontract Report, 1 April 2006--31 August 2007

    SciTech Connect (OSTI)

    Wohlgemuth, J.

    2009-05-01

    The overall objective was to provide NREL with technical results that enhance its capability to improve PV manufacturing technology by developing a PV module with specified characteristics.

  12. Sunergie PV | Open Energy Information

    Open Energy Info (EERE)

    Sunergie PV Jump to: navigation, search Name: Sunergie PV Place: Perpignan, France Zip: 66000 Product: Perpignan-based project developer. References: Sunergie PV1 This article is...

  13. Energy 101: Solar PV

    Broader source: Energy.gov [DOE]

    Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel converts the energy of the sun into renewable electricity to power...

  14. Sandia Energy - PV Publications

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

    Publications Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Publications PV PublicationsTara Camacho-Lopez2016-01-05T23:50:37+00:00 Recent...

  15. Energy 101: Solar PV

    ScienceCinema (OSTI)

    None

    2013-05-29

    Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel converts the energy of the sun into renewable electricity to power homes and businesses.

  16. Energy 101: Solar PV

    SciTech Connect (OSTI)

    2011-01-01

    Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel converts the energy of the sun into renewable electricity to power homes and businesses.

  17. Developing new high energy gradient concentration cathode material |

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

    Department of Energy 0_amine.pdf More Documents & Publications New High Energy Gradient Concentration Cathode Material New High Energy Gradient Concentration Cathode Material New High Energy Gradient Concentration Cathode Material

  18. Conergy PV | Open Energy Information

    Open Energy Info (EERE)

    Conergy PV Jump to: navigation, search Name: Conergy PV Place: Germany Product: A holding company that was formed to group all Conergy AG's PV activities. References: Conergy PV1...

  19. PV output smoothing with energy storage.

    SciTech Connect (OSTI)

    Ellis, Abraham; Schoenwald, David Alan

    2012-03-01

    This report describes an algorithm, implemented in Matlab/Simulink, designed to reduce the variability of photovoltaic (PV) power output by using a battery. The purpose of the battery is to add power to the PV output (or subtract) to smooth out the high frequency components of the PV power that that occur during periods with transient cloud shadows on the PV array. The control system is challenged with the task of reducing short-term PV output variability while avoiding overworking the battery both in terms of capacity and ramp capability. The algorithm proposed by Sandia is purposely very simple to facilitate implementation in a real-time controller. The control structure has two additional inputs to which the battery can respond. For example, the battery could respond to PV variability, load variability or area control error (ACE) or a combination of the three.

  20. Stabilized PV system

    DOE Patents [OSTI]

    Dinwoodie, Thomas L.

    2002-12-17

    A stabilized PV system comprises an array of photovoltaic (PV) assemblies mounted to a support surface. Each PV assembly comprises a PV module and a support assembly securing the PV module to a position overlying the support surface. The array of modules is circumscribed by a continuous, belt-like perimeter assembly. Cross strapping, extending above, below or through the array, or some combination of above, below and through the array, secures a first position along the perimeter assembly to at least a second position along the perimeter assembly thereby stabilizing the array against wind uplift forces. The first and second positions may be on opposite sides on the array.

  1. High concentration of deuterium in palladium

    SciTech Connect (OSTI)

    Uhm, H.S.; Lee, W.M. )

    1992-01-01

    In this paper, based on theoretical calculations, new schemes to increase the deuterium density in palladium over its initial value are presented. A high deuterium concentration in palladium is needed for application to solid-state fusion. The first deuterium enrichment scheme makes use of plasma ion implantation, which consists of a cylindrical palladium rod (target) preloaded with deuterium atoms, coated with diffusion barrier material, and immersed in a deuterium plasma. The palladium rod is connected to a high-power modulator, which provides a series of negative voltage pulses. During these negative pulses, deuterium ions fall on the target, penetrate the diffusion barrier, and are implanted inside the palladium. For reasonable system parameters allowed by current technology, theoretical calculations indicate that the saturation deuterium density after prolonged ion implantation can be several times the palladium atomic number density. The second deuterium enrichment scheme makes use of temperature gradient effects on the deuterium solubility in palladium. A heat source at temperature T{sub 2} and a heat sink at temperature T{sub 1} (where T{sub 2} {gt} T{sub 1}) are in contact with two different parts of a palladium sample, which has been presoaked with deuterium atoms and has been coated with diffusion barrier material or has been securely locked in a metal case. The temperature gradient created in the sample from such an arrangement forces the deuterium atoms in the hot region to migrate into the cold region, resulting in higher deuterium density in the cold region.

  2. Fire resistant PV shingle assembly

    DOE Patents [OSTI]

    Lenox, Carl J.

    2012-10-02

    A fire resistant PV shingle assembly includes a PV assembly, including PV body, a fire shield and a connection member connecting the fire shield below the PV body, and a support and inter-engagement assembly. The support and inter-engagement assembly is mounted to the PV assembly and comprises a vertical support element, supporting the PV assembly above a support surface, an upper interlock element, positioned towards the upper PV edge, and a lower interlock element, positioned towards the lower PV edge. The upper interlock element of one PV shingle assembly is inter-engageable with the lower interlock element of an adjacent PV shingle assembly. In some embodiments the PV shingle assembly may comprise a ventilation path below the PV body. The PV body may be slidably mounted to the connection member to facilitate removal of the PV body.

  3. Using CAD software to simulate PV energy yield - The case of product integrated photovoltaic operated under indoor solar irradiation

    SciTech Connect (OSTI)

    Reich, N.H.; van Sark, W.G.J.H.M.; Turkenburg, W.C.; Sinke, W.C.

    2010-08-15

    In this paper, we show that photovoltaic (PV) energy yields can be simulated using standard rendering and ray-tracing features of Computer Aided Design (CAD) software. To this end, three-dimensional (3-D) sceneries are ray-traced in CAD. The PV power output is then modeled by translating irradiance intensity data of rendered images back into numerical data. To ensure accurate results, the solar irradiation data used as input is compared to numerical data obtained from rendered images, showing excellent agreement. As expected, also ray-tracing precision in the CAD software proves to be very high. To demonstrate PV energy yield simulations using this innovative concept, solar radiation time course data of a few days was modeled in 3-D to simulate distributions of irradiance incident on flat, single- and double-bend shapes and a PV powered computer mouse located on a window sill. Comparisons of measured to simulated PV output of the mouse show that also in practice, simulation accuracies can be very high. Theoretically, this concept has great potential, as it can be adapted to suit a wide range of solar energy applications, such as sun-tracking and concentrator systems, Building Integrated PV (BIPV) or Product Integrated PV (PIPV). However, graphical user interfaces of 'CAD-PV' software tools are not yet available. (author)

  4. Biological denitrification of high concentration nitrate waste

    DOE Patents [OSTI]

    Francis, Chester W.; Brinkley, Frank S.

    1977-01-01

    Biological denitrification of nitrate solutions at concentrations of greater than one kilogram nitrate per cubic meter is accomplished anaerobically in an upflow column having as a packing material a support for denitrifying bacteria.

  5. Sandia Energy - Tutorial on PV System Modeling

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

    Tutorial on PV System Modeling Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Modeling & Analysis Tutorial on PV System Modeling Tutorial on PV...

  6. PV Value®

    Broader source: Energy.gov [DOE]

    PV Value® is a free solar PV Valuation tool that answers the question of "How much is solar PV worth" and is compliant with the Uniform Standards of Professional Appraisal Practice. It is available for and being used by real estate appraisers, realtors, homeowners, commercial building owners, home builders, solar installers, green raters, insurance companies, and mortgage lenders in all 50 states along with D.C. and Puerto Rico. PV Value® allows for the calculation of both the cost and income approach to value and was endorsed by the largest appraiser trade organization, the "Appraisal Institute," as an innovative approach to valuing solar assets.

  7. PV Reliability & Performance Model

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

    Reliability & Performance Model - Sandia Energy Energy Search Icon Sandia Home Locations ... Twitter Google + Vimeo GovDelivery SlideShare PV Reliability & Performance Model Home...

  8. PV Performance and Reliability

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

    Performance and Reliability - Sandia Energy Energy Search Icon Sandia Home Locations ... Twitter Google + Vimeo GovDelivery SlideShare PV Performance and Reliability Home...

  9. Distributed PV Adoption in Maine Through 2021

    SciTech Connect (OSTI)

    Gagnon, Pieter; Sigrin, Ben

    2015-11-06

    NREL has used its dSolar (distributed solar) model to generate low-medium-high estimates of distributed PV adoption in Maine through 2021. This presentation gives a high-level overview of the model and modeling results.

  10. Potential Role of Concentrating Solar Power in Enabling High...

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

    Potential Role of Concentrating Solar Power in Enabling High Renewables Scenarios in the ... DE-AC36-08GO28308 The Potential Role of Concentrating Solar Power in Enabling High ...

  11. Sandian Presents on PV Failure Analysis at European PV Solar...

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

    Presents on PV Failure Analysis at European PV Solar Energy Conference and Exhibition (EU PVSC) - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator ...

  12. Sunshine PV | Open Energy Information

    Open Energy Info (EERE)

    PV Place: Taiwan Sector: Solar Product: Taiwan-based subsidiary of Solartech Energy and thin-film PV module supplier. References: Sunshine PV1 This article is a stub. You can...

  13. PV Systems | Open Energy Information

    Open Energy Info (EERE)

    PV Systems Place: Wales, United Kingdom Zip: CF15 7JD Product: Welsh building integrated PV (BIPV) company References: PV Systems1 This article is a stub. You can help OpenEI by...

  14. Sandia Energy - PV Modeling & Analysis

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

    PV Modeling & Analysis Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Modeling & Analysis PV Modeling & AnalysisTara Camacho-Lopez2015-05-11T20:03...

  15. PV_LIB Toolbox

    Energy Science and Technology Software Center (OSTI)

    2012-09-11

    While an organized source of reference information on PV performance modeling is certainly valuable, there is nothing to match the availability of actual examples of modeling algorithms being used in practice. To meet this need, Sandia has developed a PV performance modeling toolbox (PV_LIB) for Matlab. It contains a set of well-documented, open source functions and example scripts showing the functions being used in practical examples. This toolbox is meant to help make the multi-stepmore » process of modeling a PV system more transparent and provide the means for model users to validate and understand the models they use and or develop. It is fully integrated into Matlab’s help and documentation utilities. The PV_LIB Toolbox provides more than 30 functions that are sorted into four categories« less

  16. Illinois: High-Energy, Concentration-Gradient Cathode Material...

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

    High-Energy, Concentration-Gradient Cathode Material for Plug-in Hybrids and All-Electric Vehicles Could Reduce Batteries' Cost and Size Illinois: High-Energy,...

  17. Ambiental PV | Open Energy Information

    Open Energy Info (EERE)

    Ambiental PV Jump to: navigation, search Name: Ambiental PV Place: Bahia, Brazil Zip: 40140-380 Sector: Carbon Product: Bahia-based carbon consultancy firm. References: Ambiental...

  18. PROJECT PROFILE: Enabling High Concentration Photovoltaics with 50%

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

    Efficient Solar Cells | Department of Energy Enabling High Concentration Photovoltaics with 50% Efficient Solar Cells PROJECT PROFILE: Enabling High Concentration Photovoltaics with 50% Efficient Solar Cells Funding Opportunity: SuNLaMP SunShot Subprogram: Photovoltaics Location: National Renewable Energy Laboratory, Golden, CO Amount Awarded: $8,000,000 The efficiency and concentration of III-V multi-junction solar cells are essential to reduce the cost of high concentration photovoltaic

  19. GridPV Toolbox

    Energy Science and Technology Software Center (OSTI)

    2014-07-15

    Matlab Toolbox for simulating the impact of solar energy on the distribution grid. The majority of the functions are useful for interfacing OpenDSS and MATLAB, and they are of generic use for commanding OpenDSS from MATLAB and retrieving GridPV Toolbox information from simulations. A set of functions is also included for modeling PV plant output and setting up the PV plant in the OpenDSS simulation. The toolbox contains functions for modeling the OpenDSS distribution feedermore » on satellite images with GPS coordinates. Finally, example simulations functions are included to show potential uses of the toolbox functions.« less

  20. Project Profile: High-Concentration, Low-Cost Parabolic Trough...

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

    Concentration, Low-Cost Parabolic Trough System for Baseload CSP Project Profile: High-Concentration, Low-Cost Parabolic Trough System for Baseload CSP SkyFuel logo SkyFuel, under ...

  1. Jiangxi Solar PV Corp JSPV aka Solar PV Corporation | Open Energy...

    Open Energy Info (EERE)

    Solar PV Corp JSPV aka Solar PV Corporation Jump to: navigation, search Name: Jiangxi Solar PV Corp (JSPV, aka Solar PV Corporation ) Place: Xinyu, Jiangxi Province, China Zip:...

  2. Grid integrated distributed PV (GridPV).

    SciTech Connect (OSTI)

    Reno, Matthew J.; Coogan, Kyle

    2013-08-01

    This manual provides the documentation of the MATLAB toolbox of functions for using OpenDSS to simulate the impact of solar energy on the distribution system. The majority of the functions are useful for interfacing OpenDSS and MATLAB, and they are of generic use for commanding OpenDSS from MATLAB and retrieving information from simulations. A set of functions is also included for modeling PV plant output and setting up the PV plant in the OpenDSS simulation. The toolbox contains functions for modeling the OpenDSS distribution feeder on satellite images with GPS coordinates. Finally, example simulations functions are included to show potential uses of the toolbox functions. Each function in the toolbox is documented with the function use syntax, full description, function input list, function output list, example use, and example output.

  3. GridPV

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

    6733 Unlimited Release Printed August 2013 Grid Integrated Distributed PV (GridPV) Matthew J. Reno, Kyle Coogan Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and Livermore, California 94550 Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE -AC04-94AL85000. Approved for

  4. GridPV

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

    141 Unlimited Release Printed November 2014 Grid Integrated Distributed PV (GridPV) Version 2 Matthew J. Reno, Kyle Coogan Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and Livermore, California 94550 Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.

  5. Residential, Commercial, and Utility-Scale Photovoltaic (PV)...

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

    ... In addition, broad German market acceptance of PV provides a considerable savings by reducing the high cost of onerous permitting processes. A lack of standard permit requirements ...

  6. EERE Success Story-Raising the Bar for Quality PV Modules | Department of

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

    Energy Raising the Bar for Quality PV Modules EERE Success Story-Raising the Bar for Quality PV Modules October 30, 2014 - 4:58pm Addthis As photovoltaics (PV) markets expand across the United States the manufacture of safe, reliable, and high-quality PV modules is critical to achieve cost competitive solar energy. Since the development and codification of testing standards for PV modules requires a lengthy multiyear process, Department of Energy's SunShot Initiative and National Renewable

  7. Jinzhou Boyang PV Technology | Open Energy Information

    Open Energy Info (EERE)

    Boyang PV Technology Place: Jinzhou, Liaoning Province, China Product: China-based PV product manufacturer. It is also engaged in the design and installation of PV power...

  8. The Open PV Project | Open Energy Information

    Open Energy Info (EERE)

    The Open PV Project (Redirected from Open PV) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: The Open PV Project AgencyCompany Organization: National Renewable Energy...

  9. Hunan Huayuan PV | Open Energy Information

    Open Energy Info (EERE)

    Huayuan PV Jump to: navigation, search Name: Hunan Huayuan PV Place: Hunan Province, China Product: State-owned PV wafer maker based in China's Hunan Province. References: Hunan...

  10. Teksun PV Manufacturing Inc | Open Energy Information

    Open Energy Info (EERE)

    Teksun PV Manufacturing Inc Jump to: navigation, search Logo: Teksun PV Manufacturing Inc Name: Teksun PV Manufacturing Inc Address: 401 Congress Ave Place: Austin, Texas Zip:...

  11. Updating Technical Screens for PV Interconnection: Preprint

    SciTech Connect (OSTI)

    Coddington, M.; Ellis, A.; Lynn, K.; Razon, A.; Key, T.; Kroposki, B.; Mather, B.; Hill, R.; Nicole, K.; Smith, J.

    2012-08-01

    Solar photovoltaics (PV) is the dominant type of distributed generation (DG) technology interconnected to electric distribution systems in the United States, and deployment of PV systems continues to increase rapidly. Considering the rapid growth and widespread deployment of PV systems in United States electric distribution grids, it is important that interconnection procedures be as streamlined as possible to avoid unnecessary interconnection studies, costs, and delays. Because many PV interconnection applications involve high penetration scenarios, the process needs to allow for a sufficiently rigorous technical evaluation to identify and address possible system impacts. Existing interconnection procedures are designed to balance the need for efficiency and technical rigor for all DG. However, there is an implicit expectation that those procedures will be updated over time in order to remain relevant with respect to evolving standards, technology, and practical experience. Modifications to interconnection screens and procedures must focus on maintaining or improving safety and reliability, as well as accurately allocating costs and improving expediency of the interconnection process. This paper evaluates the origins and usefulness of the capacity penetration screen, offers potential short-term solutions which could effectively allow fast-track interconnection to many PV system applications, and considers longer-term solutions for increasing PV deployment levels in a safe and reliable manner while reducing or eliminating the emphasis on the penetration screen.

  12. Open PV Project: Unlocking PV Installation Data (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2012-04-01

    This brochure summarizes the Open PV Project, a collaborative effort of government, industry, and the public to compile a comprehensive database of PV installations in the United States. The brochure outlines the purpose and history of the project as well as the main capabilities and benefits of the online Open PV tool. The brochure also introduces how features of the tool are used, and it describes the sources and characteristics of Open PV's data and data collection processes.

  13. PV Value | Department of Energy

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

    PV Value is a web-based tool that calculates the energy production value for a residential or commercial photovoltaic (PV) system. The tool is Uniform Standards of Progressional ...

  14. Sandia Energy - PV Program Disclaimer

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

    PV Program Disclaimersspope2015-03-23T21:15:29+00:00 PV Program Disclaimer The Photovoltaic Projects at Sandia National Laboratories support the development and deployment of...

  15. Sandia Energy - PV Systems Reliability

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

    Systems Reliability Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Systems Reliability PV Systems ReliabilityCoryne Tasca2015-05-08T03:40:54+00:00...

  16. Ukiah Utilities- PV Buydown Program

    Broader source: Energy.gov [DOE]

    Through Ukiah Utilities’ PV Buydown Program, residential and commercial customers are eligible for a $1.40-per-watt AC rebate on qualifying grid-connected PV systems up to a maximum system size of...

  17. Kenmos PV | Open Energy Information

    Open Energy Info (EERE)

    navigation, search Name: Kenmos PV Place: Tainan, Taiwan Sector: Solar Product: Solar business unit of Kenmos Technology which was set up in Sep 2007, to produce thin film PV...

  18. PV Trackers | Open Energy Information

    Open Energy Info (EERE)

    Trackers Jump to: navigation, search Name: PV Trackers Product: Designer of dual axis trackers References: PV Trackers1 This article is a stub. You can help OpenEI by expanding...

  19. Illinois: High-Energy, Concentration-Gradient Cathode Material...

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

    a high-energy, concentration-gradient cathode material for plug-in hybrid and all-electric vehicles. ... market growth, leading to reductions in carbon pollution and imported oil. ...

  20. Developing new high energy gradient concentration cathode material...

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

    Merit Review and Peer Evaluation Meeting, May 18-22, 2009 -- Washington D.C. PDF icon esp10amine.pdf More Documents & Publications New High Energy Gradient Concentration ...

  1. Delta PV Pvt Ltd | Open Energy Information

    Open Energy Info (EERE)

    PV Pvt Ltd Jump to: navigation, search Name: Delta PV Pvt Ltd Place: India Product: Focused on PV cells and modules. References: Delta PV Pvt Ltd1 This article is a stub. You can...

  2. Solar PV and Glare Factsheet

    Broader source: Energy.gov [DOE]

    A common misconception about solar photovoltaic (PV) panels is that they inherently cause or create "too much" glare, posing a nuisance to neighbors and a safety risk for pilots. While solar PV systems can produce glare, light absorption - rather than reflection - is central to the function of solar PV panels. This fact sheet describes the basic issues surrounding glare from solar PV panels, the new Federal Aviation Administration guidance, and the implications for local governments.

  3. PVT -- A photovoltaic/thermal concentrator total energy system: Final phase 1 project report. Building opportunities in the U.S. for photovoltaics (PV:BONUS) Two

    SciTech Connect (OSTI)

    1998-12-31

    United Solar completed its Phase 1 report and its proposal for Phase 2 of the PVBONUS Two program at the end of March 1998. At the same time, it also completed and submitted a proposal to the California Energy Commission PIER program for additional funding to cost-share development and testing of a pre-production model of the PVT-14. It was unsuccessful in both of these proposed efforts. While waiting for the proposal decisions, work continued in April and May to analyze the system design and component decisions described below. This document is a final summation report on the Phase 1 effort of the PVBONUS Two program that describes the key technical issues that United Solar and its subcontractor, Industrial Solar Technology Corporation, worked on in preparation of a Phase 2 award. The decisions described were ones that will guide the design and fabrication of a pre-production prototype of a 1500:1 mirrored concentrator with gallium arsenide cells when United solar resumes its development work. The material below is organized by citing the key components that underwent a design review, what the company considered, what was decided, the name of the expected supplier, if not to be produced in-house, and some information about expected costs. The cost figures given are usually budgetary estimates, not the result of firm quotations or extensive analysis.

  4. Advanced, High-Reliability, System-Integrated 500kW PV Inverter Development: Final Subcontract Report, 29 September 2005 - 31 May 2008

    SciTech Connect (OSTI)

    West, R.

    2008-08-01

    Xantrex Technology accomplished subcontract goals of reducing parts cost, weight, and size of its 500-kW inverter by 25% compared to state-of-the-art PV inverters, while extending reliability by 25%.

  5. 2015 PV Module Reliability Workshop

    Broader source: Energy.gov [DOE]

    The National Renewable Energy Laboratory hosts an annual Photovoltaic (PV) Module Reliability Workshop so that solar technology experts can share information leading to the improvement of PV module reliability. Improvements to module reliability reduce the cost of solar electricity and promotes investor confidence in the technology—both critical goals for moving PV technologies deeper into the electricity marketplace.

  6. Testing for PV Reliability (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Bansal, S.

    2014-09-01

    The DOE SUNSHOT workshop is seeking input from the community about PV reliability and how the DOE might address gaps in understanding. This presentation describes the types of testing that are needed for PV reliability and introduces a discussion to identify gaps in our understanding of PV reliability testing.

  7. Ultra-High-Efficiency Multijunction Cell and Receiver Module, Phase 1B: High Performance PV Exploring and Accelerating Ultimate Pathways; Final Subcontract Report, 13 May 2005 - 10 December 2008

    SciTech Connect (OSTI)

    King, R. R.

    2010-03-01

    Spectrolab's two High Performance Photovoltaics primary objectives: (1) develop ultra-high-efficiency concentrator multijunction cells and (2) develop a robust concentrator cell receiver package.

  8. Habdank PV Montagesysteme GmbH Co KG Habdank PV Mounting Systems...

    Open Energy Info (EERE)

    Germany Zip: 73037 Product: Germany-based manufacturer of mounting systems for PV installations. References: Habdank PV-Montagesysteme GmbH & Co KG Habdank PV Mounting...

  9. Real time PV manufacturing diagnostic system

    SciTech Connect (OSTI)

    Kochergin, Vladimir; Crawford, Michael A.

    2015-09-01

    The main obstacle Photovoltaic (PV) industry is facing at present is the higher cost of PV energy compared to that of fossil energy. While solar cell efficiencies continue to make incremental gains these improvements are so far insufficient to drive PV costs down to match that of fossil energy. Improved in-line diagnostics however, has the potential to significantly increase the productivity and reduce cost by improving the yield of the process. On this Phase I/Phase II SBIR project MicroXact developed and demonstrated at CIGS pilot manufacturing line a high-throughput in-line PV manufacturing diagnostic system, which was verified to provide fast and accurate data on the spatial uniformity of thickness, an composition of the thin films comprising the solar cell as the solar cell is processed reel-to-reel. In Phase II project MicroXact developed a stand-alone system prototype and demonstrated the following technical characteristics: 1) ability of real time defect/composition inconsistency detection over 60cm wide web at web speeds up to 3m/minute; 2) Better than 1mm spatial resolution on 60cm wide web; 3) an average better than 20nm spectral resolution resulting in more than sufficient sensitivity to composition imperfections (copper-rich and copper-poor regions were detected). The system was verified to be high vacuum compatible. Phase II results completely validated both technical and economic feasibility of the proposed concept. MicroXact’s solution is an enabling technique for in-line PV manufacturing diagnostics to increase the productivity of PV manufacturing lines and reduce the cost of solar energy, thus reducing the US dependency on foreign oil while simultaneously reducing emission of greenhouse gasses.

  10. Concentrator Photovoltaic System Basics | Department of Energy

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

    Concentrator Photovoltaic System Basics Concentrator Photovoltaic System Basics August 20, 2013 - 4:12pm Addthis Concentrator photovoltaic (PV) systems use less solar cell material ...

  11. High concentration low wattage solar arrays and their applications

    SciTech Connect (OSTI)

    Hoffmann, R.; OGallagher, J.; Winston, R.

    1997-02-01

    Midway Labs currently produces a 335x concentrator module that has reached as high as 19{percent} active area efficiency in production. The current production module uses the single crystal silicon back contact SunPower cell. The National Renewable Energy Lab has developed a multi junction cell using GalnP/GaAs technologies. The high efficiency ({gt}30{percent}) and high cell voltage offer an opportunity for Midway Labs to develop a tracking concentrator module that will provide 24 volts in the 140 to 160 watt range. This voltage and wattage range is applicable to a range of small scale water pumping applications that make up the bulk of water pumping solar panel sales. {copyright} {ital 1997 American Institute of Physics.}

  12. Jinzhou Prime Solar PV Technology Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    PV Technology Co Ltd Jump to: navigation, search Name: Jinzhou Prime Solar PV Technology Co Ltd Place: China Product: The company produces pv cell and develops pv project....

  13. PV Validation and Bankability Workshop

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

    Rate or Insurance Premium In less mature industries (such as within solar), these ... Manufacturers, System Integrators, Consumers * What: PV Cells, PVCPV modules, ...

  14. BeyondPV Co Ltd Bayang Solar PV | Open Energy Information

    Open Energy Info (EERE)

    Co Ltd (Bayang Solar PV) Place: Tainan, Taiwan Zip: 70955 Product: BeyondPV is an a-Si thin-film silicon PV maker based in southern Taiwan. References: BeyondPV Co Ltd (Bayang...

  15. PV Crystalox Solar AG formerly PV Silicon AG | Open Energy Information

    Open Energy Info (EERE)

    PV Crystalox Solar AG formerly PV Silicon AG Jump to: navigation, search Name: PV Crystalox Solar AG (formerly PV Silicon AG) Place: Abingdon, England, United Kingdom Zip: OX14 4SE...

  16. Interband cascade (IC) photovoltaic (PV) architecture for PV devices

    DOE Patents [OSTI]

    Yang, Rui Q.; Tian, Zhaobing; Mishima, Tetsuya D.; Santos, Michael B.; Johnson, Matthew B.; Klem, John F.

    2015-10-20

    A photovoltaic (PV) device, comprising a PV interband cascade (IC) stage, wherein the IC PV stage comprises an absorption region with a band gap, the absorption region configured to absorb photons, an intraband transport region configured to act as a hole barrier, and an interband tunneling region configured to act as an electron barrier. An IC PV architecture for a photovoltaic device, the IC PV architecture comprising an absorption region, an intraband transport region coupled to the absorption region, and an interband tunneling region coupled to the intraband transport region and to the adjacent absorption region, wherein the absorption region, the intraband transport region, and the interband tunneling region are positioned such that electrons will flow from the absorption region to the intraband transport region to the interband tunneling region.

  17. PV Nano Cell | Open Energy Information

    Open Energy Info (EERE)

    Cell Jump to: navigation, search Name: PV Nano Cell Place: Israel Product: Israel-based firm focused on PV nano cell technology. References: PV Nano Cell1 This article is a stub....

  18. All Solar PV | Open Energy Information

    Open Energy Info (EERE)

    Solar PV Jump to: navigation, search Logo: All Solar PV Name: All Solar PV Address: 1407-4-105 Century East,Daliushu Road Place: Beijing, China Sector: Solar Product: Solar Energy...

  19. Gansu PV Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Gansu PV Co Ltd Jump to: navigation, search Name: Gansu PV Co Ltd Place: Lanzhou, Gansu Province, China Zip: 730000 Sector: Solar Product: Gansu PV Co Ltd is active in...

  20. PV World Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    World Co Ltd Jump to: navigation, search Name: PV World Co Ltd Place: Singapore Product: Singapore-based PV module manufacturer. References: PV World Co Ltd1 This article is a...

  1. Generation PV Inc | Open Energy Information

    Open Energy Info (EERE)

    PV Inc Jump to: navigation, search Name: Generation PV Inc. Place: Markham, Ontario, Canada Zip: L6E 1A9 Sector: Wind energy Product: Ontario-based Generation PV distributes and...

  2. Tokyo Electron PV | Open Energy Information

    Open Energy Info (EERE)

    PV Jump to: navigation, search Name: Tokyo Electron PV Place: Nirasaki City, Yamanashi, Japan Product: Japanese electronics giants Tokyo Electron and Sharp have announced their...

  3. Zhonghuite PV Technology Co | Open Energy Information

    Open Energy Info (EERE)

    Zhonghuite PV Technology Co Jump to: navigation, search Name: Zhonghuite PV Technology Co Place: Jiangxi Province, China Sector: Solar Product: Jiangxi-based solar project...

  4. PV Solar Planet | Open Energy Information

    Open Energy Info (EERE)

    Solar Planet Jump to: navigation, search Logo: PV Solar Planet Name: PV Solar Planet Address: 5856 S. Garland Way Place: Littleton, Colorado Zip: 80123 Region: Rockies Area Sector:...

  5. Sandia Energy - Evaluating Rooftop Strength for PV

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

    Evaluating Rooftop Strength for PV Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics Evaluating Rooftop Strength for PV Evaluating Rooftop Strength for...

  6. European American Solar Deployment Conference (PV Rollout), 2013

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

    NW, Atlanta, GA 30332, USA Phone: 505-620-6560 E-Mail: matthew.reno@gatech.edu Introduction Deployment of distributed PV systems is increasing rapidly. High penetration scenarios, ...

  7. Shock initiation studies on high concentration hydrogen peroxide

    SciTech Connect (OSTI)

    Sheffield, Stephen A; Dattelbaum, Dana M; Stahl, David B; Gibson, L. Lee; Bartram, Brian D.

    2009-01-01

    Concentrated hydrogen peroxide (H{sub 2}O{sub 2}) has been known to detonate for many years. However, because of its reactivity and the difficulty in handling and confining it, along with the large critical diameter, few studies providing basic information about the initiation and detonation properties have been published. We are conducting a study to understand and quantify the initiation and detonation properties of highly concentrated H{sub 2}O{sub 2} using a gas-driven two-stage gun to produce well defined shock inputs. Multiple magnetic gauges are used to make in-situ measurements of the growth of reaction and subsequent detonation in the liquid. These experiments are designed to be one-dimensional to eliminate any difficulties that might be encountered with large critical diameters. Because of the concern of the reactivity of the H{sub 2}O{sub 2} with the confining materials, a remote loading system has been developed. The gun is pressurized, then the cell is filled and the experiment shot within less than three minutes. TV cameras are attached to the target so the cell filling can be monitored. Several experiments have been completed on {approx}98 wt % H{sub 2}O{sub 2}/H{sub 2}O mixtures; initiation has been observed in some experiments that shows homogeneous shock initiation behavior. The initial shock pressurizes and heats the mixture. After an induction time, a thermal explosion type reaction produces an evolving reactive wave that strengthens and eventually overdrives the first wave producing a detonation. From these measurements, we have determined unreacted Hugoniot information, times (distances) to detonation (Pop-plot points) that indicate low sensitivity, and detonation velocities of high concentration H{sub 2}O{sub 2}/H{sub 2}O solutions that agree with earlier estimates.

  8. Sensitivity of Rooftop PV Projections in the SunShot Vision Study to Market Assumptions

    SciTech Connect (OSTI)

    Drury, E.; Denholm, P.; Margolis, R.

    2013-01-01

    The SunShot Vision Study explored the potential growth of solar markets if solar prices decreased by about 75% from 2010 to 2020. The SolarDS model was used to simulate rooftop PV demand for this study, based on several PV market assumptions--future electricity rates, customer access to financing, and others--in addition to the SunShot PV price projections. This paper finds that modeled PV demand is highly sensitive to several non-price market assumptions, particularly PV financing parameters.

  9. Design and development of a high-concentration and high-efficiency photovoltaic concentrator using a curved Fresnel lens

    SciTech Connect (OSTI)

    Scharlack, R.S.; Moffat, A.

    1983-08-01

    Thermo Electron has designed a high concentration photovoltaic module that uses a domed, point-focus Fresnel lens. Their design, design optimization process, and results from lens and receiver tests are described in this report. A complete module has not been fabricated and probably will not be fabricated in the future; however, Thermo Electron's optical design, analysis, and testing of both secondary optical units and domed Fresnel lenses have made a significant contribution to our project. Tooling errors prevented the lens from reaching its potential efficiency by the end of the contract, and resolution of these tooling problems is currently being attempted with a follow-on contract, No. 68-9463.

  10. High upwind concentrations observed during an upslope tracer event

    SciTech Connect (OSTI)

    Ciolek, J.T. Jr.

    1993-10-01

    In February of 1991 the Rocky Flats Plant conducted twelve tracer experiments to validate an emergency response dispersion model known as the Terrain-Responsive Atmospheric Code (TRAC) (Hodgin 1985). Experimenters released 140 to 260 kilograms of inert tracer gas (sulfur hexafloride) from the plant over an 11 hour period. During each release, one hundred and sixty-five samples, most of which formed concentric rings of 8 and 16 km radius from the plant, recorded cumulative hourly concentrations of the tracer at one meter above ground level (AGL). Figure 1 contains a depiction of the sampler location, the terrain, and the meteorological stations available within the tracer study area. Brown (1991) describes the experimental setup in more detail. The subject of this paper is an event that occurred early in the fifth experiment, on February 9, 1991. In this experiment, tracer material released from 13:00 to 17:00 LST appeared both downwind and upwind of the source, with the highest concentrations upwind. During the fifth experiment, high pressure in Utah produced mostly sunny skis around Rocky Flats. For most of the day, one could find moderate (5 to 10 ms{sup {minus}1}) northerly (from the North) flow within the 700 to 500 mb level of the atmosphere (approximately 3000 to 5500 meters above Mean Sea Level (MSL)). Synoptic scale motions were isolated enough from the surface layer and heating was great enough to produce a 1 km deep upslope flow (flow from the East to the West) by late afternoon. The winds reversed and became downslope at approximately 17:30 LST.

  11. Low-Cost High-Concentration Photovoltaic Systems for Utility Power Generation

    SciTech Connect (OSTI)

    McConnell, R.; Garboushian, V.; Gordon, R.; Dutra, D.; Kinsey, G.; Geer, S.; Gomez, H.; Cameron, C.

    2012-03-31

    Under DOE's Technology Pathway Partnership (TPP) program, Amonix, Inc. developed a new generation of high-concentration photovoltaic systems using multijunction technology and established the manufacturing capacity needed to supply multi-megawatt power plants buing using the new Amonix 7700-series solar energy systems. For this effort, Amonix Collaborated with a variety of suppliers and partners to complete project tasks. Subcontractors included: Evonik/Cyro; Hitek; the National Renewable Energy Laboratory (NREL); Raytech; Spectrolab; UL; University of Nevada, Las Vegas; and TUV Rheinland PTL. The Amonix TPP tasks included: Task 1: Multijunction Cell Optimization for Field Operation, Task 2: Fresnel Lens R&D, Task 3: Cell Package Design & Production, Task 4: Standards Compliance and Reliability Testing, Task 5: Receiver Plate Production, Task 6: MegaModule Performance, Task 7: MegaModule Cost Reduction, Task 8: Factory Setup and MegaModule Production, Task 9: Tracker and Tracking Controller, Task 10: Installation and Balance of System (BOS), Task 11: Field Testing, and Task 12: Solar Advisor Modeling and Market Analysis. Amonix's TPP addressed nearly the complete PV value chain from epitaxial layer design and wafer processing through system design, manufacturing, deployment and O&M. Amonix has made progress toward achieving these reduced costs through the development of its 28%+ efficient MegaModule, reduced manufacturing and installation cost through design for manufacturing and assembly, automated manufacturing processes, and reduced O&M costs. Program highlights include: (1) Optimized multijunction cell and cell package design to improve performance by > 10%; (2) Updated lens design provided 7% increased performance and higher concentration; (3) 28.7% DC STC MegaModule efficiency achieved in Phase II exceeded Phase III performance goal; (4) New 16' focal length MegaModule achieved target materials and manufacturing cost reduction; (5) Designed and placed into production 25 MW/yr manufacturing capacity for complete MegaModules, including cell packages, receiver plates, and structures with lenses; (6) Designed and deployed Amonix 7700 series systems rated at 63 kW PTC ac and higher. Based on an LCOE assessment using NREL's Solar Advisor Model, Amonix met DOE's LCOE targets: Amonix 2011 LCOE 12.8 cents/kWh (2010 DOE goal 10-15); 2015 LCOE 6.4 cents/kWh (2015 goal 5-7) Amonix and TPP participants would like to thank the U.S. Department of Energy Solar Energy Technology Program for funding received under this program through Agreement No. DE-FC36-07GO17042.

  12. Rooftop Solar PV & Firefighter Safety

    Broader source: Energy.gov [DOE]

    Solar photovoltaic (PV) installations have experienced significant growth in recent years. Due to technological innovations and cost reductions, solar energy is a viable option for an increasing number of residences and businesses across the United States. Rooftop solar is considered safe – to date there has been no documented case of death from the electric shock, chemical burn or conventional fire caused by a solar panel; however, as more buildings install rooftop solar systems, the likelihood increases that fires will occur on buildings with solar, making it critical for firefighters to receive comprehensive solar education and training. This SolarOPs fact sheet gives a brief overview of typical solar PV installations, addresses the major hazards and risks to firefighters, discusses fire safety in Germany (the country with the most installed solar PV per capita), and suggests recommendations and resources to ensure that first responders are prepared to fight fires on homes and buildings with rooftop solar PV.

  13. PV | OpenEI Community

    Open Energy Info (EERE)

    this new 550 MW PV Solar Plant in Southern California is the latest feather in DOE's cap. Read more about it on Breaking Energy or checkout the info page from the California...

  14. Turlock Irrigation District- PV Rebate

    Broader source: Energy.gov [DOE]

    Turlock Irrigation District (TID) offers an incentive program to their customers who install solar photovoltaic (PV) systems. In keeping with the terms of the California Solar Initiative, the inc...

  15. NREL: Photovoltaics Research - PV News

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

    PV News The National Renewable Energy Laboratory Photovoltaic (PV) Research Program highlights latest research and news accomplishments from the laboratory on this page. Subscribe to the RSS feed RSS . Learn about RSS. March 28, 2016 NREL Research into Perovskites Yields New Findings Two recently published papers show the results of photoemission spectroscopy and time-resolved optical spectroscopy, which quantify the energetics and carrier dynamics that occur at interfaces between the perovskite

  16. Pressure-equalizing PV assembly and method

    DOE Patents [OSTI]

    Dinwoodie, Thomas L.

    2004-10-26

    Each PV assembly of an array of PV assemblies comprises a base, a PV module and a support assembly securing the PV module to a position overlying the upper surface of the base. Vents are formed through the base. A pressure equalization path extends from the outer surface of the PV module, past the PV module, to and through at least one of the vents, and to the lower surface of the base to help reduce wind uplift forces on the PV assembly. The PV assemblies may be interengaged, such as by interengaging the bases of adjacent PV assemblies. The base may include a main portion and a cover and the bases of adjacent PV assemblies may be interengaged by securing the covers of adjacent bases together.

  17. PV module mounting method and mounting assembly

    DOE Patents [OSTI]

    Lenox, Carl J.S.; Johnson, Kurt M.

    2013-04-23

    A method for mounting PV modules to a deck includes selecting PV module layout pattern so that adjacent PV module edges are spaced apart. PV mounting and support assemblies are secured to the deck according to the layout pattern using fasteners extending into the deck. The PV modules are placed on the PV mounting and support assemblies. Retaining elements are located over and secured against the upper peripheral edge surfaces of the PV modules so to secure them to the deck with the peripheral edges of the PV modules spaced apart from the deck. In some examples a PV module mounting assembly, for use on a shingled deck, comprises flashing, a base mountable on the flashing, a deck-penetrating fastener engageable with the base and securable to the deck so to secure the flashing and the base to the shingled deck, and PV module mounting hardware securable to the base.

  18. PSCAD Modules Representing PV Generator

    SciTech Connect (OSTI)

    Muljadi, E.; Singh, M.; Gevorgian, V.

    2013-08-01

    Photovoltaic power plants (PVPs) have been growing in size, and the installation time is very short. With the cost of photovoltaic (PV) panels dropping in recent years, it can be predicted that in the next 10 years the contribution of PVPs to the total number of renewable energy power plants will grow significantly. In this project, the National Renewable Energy Laboratory (NREL) developed a dynamic modeling of the modules to be used as building blocks to develop simulation models of single PV arrays, expanded to include Maximum Power Point Tracker (MPPT), expanded to include PV inverter, or expanded to cover an entire PVP. The focus of the investigation and complexity of the simulation determines the components that must be included in the simulation. The development of the PV inverter was covered in detail, including the control diagrams. Both the current-regulated voltage source inverter and the current-regulated current source inverter were developed in PSCAD. Various operations of the PV inverters were simulated under normal and abnormal conditions. Symmetrical and unsymmetrical faults were simulated, presented, and discussed. Both the three-phase analysis and the symmetrical component analysis were included to clarify the understanding of unsymmetrical faults. The dynamic model validation was based on the testing data provided by SCE. Testing was conducted at SCE with the focus on the grid interface behavior of the PV inverter under different faults and disturbances. The dynamic model validation covers both the symmetrical and unsymmetrical faults.

  19. Connecticut Rooftop Solar PV Permitting Guide

    Broader source: Energy.gov [DOE]

    The Connecticut Rooftop Solar PV Permitting Guide is a compilation of best practices and resources for solar PV permitting. The guide includes a summary of current codes and regulations affecting solar PV, best practices for streamlining the municipal permitting process, and tools to assist municipalities in creating a streamlined permit process for residential solar PV. Resources include a solar PV permit application, a structural review worksheet, an inspection checklist, and a model solar zoning ordinance.

  20. Wet oxidation of high-concentration reactive dyes

    SciTech Connect (OSTI)

    Chen, G.; Lei, L.; Yue, P.L.

    1999-05-01

    Advanced oxidation methods were used to degrade reactive dyes at high concentrations in aqueous solutions. Wet peroxide oxidation (WPO) was found to be the best method in terms of the removal of color and total organic carbon (TOC). Reactive blue (Basilen Brilliant Blue P-3R) was chosen as a model dye for determining the suitable reaction conditions. The variables studied include reaction temperature, H{sub 2}O{sub 2} dosage, solution pH, dye concentration, and catalyst usage. The removal of TOC and color by wet oxidation is very sensitive to the reaction temperature. At 150 C, the removal of 77% TOC and 90% color was obtained in less than 30 min. The initial TOC removal rate is proportional to the H{sub 2}O{sub 2} dosage. The TOC removal is insignificant even when 50% of the stoichiometric amount of H{sub 2}O{sub 2} is used. No color change is observed until the dosage of H{sub 2}O{sub 2} is 100% of the stoichiometric amount. The color removal is closely related to TOC removal. When the pH of the solution is adjusted to 3.5, the dye degradation rate increases significantly. The rates of TOC and color removal are enhanced by using a Cu{sup 2+} catalyst. Another four reactive dyes, Procion Red PX-4B, Cibacron Yellow P-6GS, Cibacron Brown P-6R, and Procion Black PX-2R, were treated at 150 C using WPO. More than 80% TOC was removed from the solution in less than 15 min. The process can remove the colors of al these dyes except Procion Black PX-2R.

  1. 3-Port Single-Stage PV & Battery Converter Improves Efficiency and Cost in Combined PV/Battery Systems

    SciTech Connect (OSTI)

    Bundschuh, Paul

    2013-03-23

    Due to impressive cost reductions in recent years, photovoltaic (PV) generation is now able to produce electricity at highly competitive prices, but PV’s inherent intermittency reduces the potential value of this energy. The integration of battery storage with PV will be transformational by increasing the value of solar. Utility scale systems will benefit by firming intermittency including PV ramp smoothing, grid support and load shifting, allowing PV to compete directly with conventional generation. For distributed grid-tied PV adding storage will reduce peak demand utility charges, as well as providing backup power during power grid failures. The largest long term impact of combined PV and battery systems may be for delivering reliable off-grid power to the billions of individuals globally without access to conventional power grids, or for billions more that suffer from daily power outages. PV module costs no longer dominate installed PV system costs. Balance-of-System (BOS) costs including the PV inverter and installation now contribute the majority of installed system costs. Battery costs are also dropping faster than installation and battery power converter systems. In each of these separate systems power converters have become a bottleneck for efficiency, cost and reliability. These bottlenecks are compounded in hybrid power conversion systems that combine separate PV and battery converters. Hybrid power conversion systems have required multiple power converters hardware units and multiple power conversion steps adding to efficiency losses, product and installation costs, and reliability issues. Ideal Power Converters has developed and patented a completely new theory of operation for electronic power converters using its indirect EnergyPacket Switching™ topology. It has established successful power converter products for both PV and battery systems, and its 3-Port Hybrid Converter is the first product to exploit the topology’s capability for the industry’s first single-stage multi-port hybrid power converter. This unique low cost approach eliminates the hybrid power conversion bottlenecks when integrating batteries into PV systems. As result this product will significantly accelerate market adoption of these systems.

  2. Materials from 2014 SunShot Summit Breakout Session: Looking Ahead: PV Manufacturing in 10 Years

    Broader source: Energy.gov [DOE]

    This was a breakout session at the 2014 SunShot Grand Challenge Summit and Peer Review. The global PV manufacturing landscape has undergone significant changes in the past decade, from geographic and economic changes in the supply chain to a significant increase in PV module production by fewer manufacturers. The lessons learned over the last decade will guide the future of this growing industry. This session explored the future of PV manufacturing over the next 5 to 10 years, both domestic and abroad. Expert panelists provided their insights and perspectives across three thematic areas: a vision of PV manufacturing, including the level of integration and the factory of the future; value-adding attributes of PV products; and the geographic concentration of PV manufacturing.

  3. High Performance Photovoltaic Project Overview

    SciTech Connect (OSTI)

    Symko-Davies, M.; McConnell, R.

    2005-01-01

    The High-Performance Photovoltaic (HiPerf PV) Project was initiated by the U.S. Department of Energy to substantially increase the viability of photovoltaics (PV) for cost-competitive applications so that PV can contribute significantly to our energy supply and environment in the 21st century. To accomplish this, the National Center for Photovoltaics (NCPV) directs in-house and subcontracted research in high-performance polycrystalline thin-film and multijunction concentrator devices. In this paper, we describe the recent research accomplishments in the in-house directed efforts and the research efforts under way in the subcontracted area.

  4. Role of Concentrating Solar Power in Integrating Solar and Wind Energy: Preprint

    SciTech Connect (OSTI)

    Denholm, P.; Mehos, M.

    2015-06-03

    As wind and solar photovoltaics (PV) increase in penetration it is increasingly important to examine enabling technologies that can help integrate these resources at large scale. Concentrating solar power (CSP) when deployed with thermal energy storage (TES) can provide multiple services that can help integrate variable generation (VG) resources such as wind and PV. CSP with TES can provide firm, highly flexible capacity, reducing minimum generation constraints which limit penetration and results in curtailment. By acting as an enabling technology, CSP can complement PV and wind, substantially increasing their penetration in locations with adequate solar resource.

  5. Partial Shading in Monolithic Thin Film PV Modules: Analysis...

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

    Partial Shading in Monolithic Thin Film PV Modules: Analysis and Design Partial Shading in Monolithic Thin Film PV Modules: Analysis and Design Presented at the PV Module ...

  6. Beijing Sunpu Solar PV Technology Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    China Zip: 100083 Sector: Solar Product: Manufacturers of PV-powered street lights, inverters and other solar PV systems. References: Beijing Sunpu Solar PV Technology Co Ltd1...

  7. China and India PV Reliability-NREL Cooperation | Open Energy...

    Open Energy Info (EERE)

    PV Reliability-NREL Cooperation Jump to: navigation, search Logo: China and India PV Reliability under the Asia Pacific Partnership Name China and India PV Reliability under the...

  8. Bandgap Engineering in High-Efficiency Multijunction Concentrator Cells

    SciTech Connect (OSTI)

    King, R. R.; Sherif, R. A.; Kinsey, G. S.; Kurtz, S.; Fetzer, C. M.; Edmondson, K. M.; Law, D. C.; Cotal, H. L.; Krut, D. D.; Ermer, J. H.; Karam, N. H.

    2005-08-01

    This paper discusses semiconductor device research paths under investigation with the aim of reaching the milestone efficiency of 40%. A cost analysis shows that achieving very high cell efficiencies is crucial for the realization of cost-effective photovoltaics, because of the strongly leveraging effect of efficiency on module packaging and balance-of systems costs. Lattice-matched (LM) GaInP/ GaInAs/ Ge 3-junction cells have achieved the highest independently confirmed efficiency at 175 suns, 25?C, of 37.3% under the standard AM1.5D, low-AOD terrestrial spectrum. Lattice-mismatched, or metamorphic (MM), materials offer still higher potential efficiencies, if the crystal quality can be maintained. Theoretical efficiencies well over 50% are possible for a MM GaInP/ 1.17-eV GaInAs/ Ge 3-junction cell limited by radiative recombination at 500 suns. The bandgap - open circuit voltage offset, (Eg/q) - Voc, is used as a valuable theoretical and experimental tool to characterize multijunction cells with subcell bandgaps ranging from 0.7 to 2.1 eV. Experimental results are presented for prototype 6-junction cells employing an active {approx}1.1-eV dilute nitride GaInNAs subcell, with active-area efficiency greater than 23% and over 5.3 V open-circuit voltage under the 1-sun AM0 space spectrum. Such cell designs have theoretical efficiencies under the terrestrial spectrum at 500 suns concentration exceeding 55% efficiency, even for lattice-matched designs.

  9. How Can We Make PV Modules Safer?: Preprint

    SciTech Connect (OSTI)

    Wohlgemuth, J. H.; Kurtz, S. R.

    2012-06-01

    Safety is a prime concern for the photovoltaics (PV) industry. As a technology deployed on residential and commercial buildings, it is critical that PV not cause damage to the buildings nor harm the occupants. Many of the PV systems on buildings are of sufficiently high voltage (300 to 600 Volts dc) that they may present potential hazards. These PV systems must be safe in terms of mechanical damage (nothing falls on someone), shock hazard (no risk of electrical shock when touching an exposed circuit element), and fire (the modules neither cause nor promote a fire). The present safety standards (IEC 61730 and UL 1703) do a good job of providing for design rules and test requirements for mechanical, shock, and spread of flame dangers. However, neither standard addresses the issue of electrical arcing within a module that can cause a fire. To make PV modules, they must be designed, built, and installed with an emphasis on minimizing the potential for open circuits and ground faults. This paper provides recommendations on redundant connection designs, robust mounting methods, and changes to the safety standards to yield safer PV modules.

  10. Interconnecting PV on New York City's Secondary Network Distribution System

    SciTech Connect (OSTI)

    K. Anderson; M. Coddington; K. Burman; S. Hayter; B. Kroposki; and A. Watson

    2009-11-30

    The U.S. Department of Energy (DOE) has teamed with cities across the country through the Solar America Cities (SAC) partnership program to help reduce barriers and accelerate implementation of solar energy. The New York City SAC team is a partnership between the City University of New York (CUNY), the New York City Mayor s Office of Long-term Planning and Sustainability, and the New York City Economic Development Corporation (NYCEDC).The New York City SAC team is working with DOE s National Renewable Energy Laboratory (NREL) and Con Edison, the local utility, to develop a roadmap for photovoltaic (PV) installations in the five boroughs. The city set a goal to increase its installed PV capacity from1.1 MW in 2005 to 8.1 MW by 2015 (the maximum allowed in 2005). A key barrier to reaching this goal, however, is the complexity of the interconnection process with the local utility. Unique challenges are associated with connecting distributed PV systems to secondary network distribution systems (simplified to ???¢????????networks???¢??????? in this report). Although most areas of the country use simpler radial distribution systems to distribute electricity, larger metropolitan areas like New York City typically use networks to increase reliability in large load centers. Unlike the radial distribution system, where each customer receives power through a single line, a network uses a grid of interconnected lines to deliver power to each customer through several parallel circuits and sources. This redundancy improves reliability, but it also requires more complicated coordination and protection schemes that can be disrupted by energy exported from distributed PV systems. Currently, Con Edison studies each potential PV system in New York City to evaluate the system s impact on the network, but this is time consuming for utility engineers and may delay the customer s project or add cost for larger installations. City leaders would like to streamline this process to facilitate faster, simpler, and less expensive distributed PV system interconnections. To assess ways to improve the interconnection process, NREL conducted a four-part study with support from DOE. The NREL team then compiled the final reports from each study into this report. In Section 1???¢????????PV Deployment Analysis for New York City???¢????????we analyze the technical potential for rooftop PV systems in the city. This analysis evaluates potential PV power production in ten Con Edison networks of various locations and building densities (ranging from high density apartments to lower density single family homes). Next, we compare the potential power production to network loads to determine where and when PV generation is most likely to exceed network load and disrupt network protection schemes. The results of this analysis may assist Con Edison in evaluating future PV interconnection applications and in planning future network protection system upgrades. This analysis may also assist other utilities interconnecting PV systems to networks by defining a method for assessing the technical potential of PV in the network and its impact on network loads. Section 2???¢????????A Briefing for Policy Makers on Connecting PV to a Network Grid???¢????????presents an overview intended for nontechnical stakeholders. This section describes the issues associated with interconnecting PV systems to networks, along with possible solutions. Section 3???¢????????Technical Review of Concerns and Solutions to PV Interconnection in New Y

  11. Energy 101: Solar PV | Department of Energy

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

    Solar PV Energy 101: Solar PV Addthis Description Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel converts the energy of the sun into renewable electricity to power homes and businesses. Text Version Below is the text version for the Energy 101: Solar PV video. The video opens with "Energy 101: Solar PV." This is followed by a timelapse shot of a city skyline as day turns to night. All right, we all know

  12. Comparison of Pyranometers vs. PV Reference Cells for Evaluation of PV Array Performance

    SciTech Connect (OSTI)

    Dunn, L.; Gostein, M.; Emery, K.

    2012-09-01

    As the photovoltaics (PV) industry has grown, the need for accurately monitoring the solar resource of PV power plants has increased. Historically, the PV industry has relied on thermopile pyranometers for irradiance measurements, and a large body of historical irradiance data taken with pyranometers exists. However, interest in PV reference devices is increasing. In this paper, we discuss why PV reference devices are better suited for PV applications, and estimate the typical uncertainties in irradiance measurements made with both pyranometers and PV reference devices. We assert that the quantity of interest in monitoring a PV power plant is the equivalent irradiance under the IEC 60904-3 reference solar spectrum that would produce the same electrical response in the PV array as the incident solar radiation. For PV-plant monitoring applications, we find the uncertainties in irradiance measurements of this type to be on the order of +/-5% for thermopile pyranometers and +/-2.4% for PV reference devices.

  13. Methods and devices for high-throughput dielectrophoretic concentration

    DOE Patents [OSTI]

    Simmons, Blake A.; Cummings, Eric B.; Fiechtner, Gregory J.; Fintschenko, Yolanda; McGraw, Gregory J.; Salmi, Allen

    2010-02-23

    Disclosed herein are methods and devices for assaying and concentrating analytes in a fluid sample using dielectrophoresis. As disclosed, the methods and devices utilize substrates having a plurality of pores through which analytes can be selectively prevented from passing, or inhibited, on application of an appropriate electric field waveform. The pores of the substrate produce nonuniform electric field having local extrema located near the pores. These nonuniform fields drive dielectrophoresis, which produces the inhibition. Arrangements of electrodes and porous substrates support continuous, bulk, multi-dimensional, and staged selective concentration.

  14. PV Powered Inc | Open Energy Information

    Open Energy Info (EERE)

    PV Powered Inc Place: Bend, Oregon Zip: 97702 Product: Oregon-based manufacturer of inverters for PV systems. Coordinates: 44.05766, -121.315549 Show Map Loading map......

  15. City of Healdsburg- PV Incentive Program

    Broader source: Energy.gov [DOE]

    Through the City of Healdsburg's PV Buy-down Program, residential and commercial customers are eligible for rebate on qualifying grid-connected PV systems. In keeping with SB1, (the California...

  16. Webinar: Evaluating Roof Structures for Solar PV

    Broader source: Energy.gov [DOE]

    This webinar provides an overview of Connecticut's Structural Review Worksheet for Residential Rooftop Solar PV Systems. The webinar explains how the worksheet should be used and common concerns with wind and dead loads for rooftop solar PV.

  17. The Open PV Project | Department of Energy

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

    The Open PV Project The Open PV Project The Open PV Project is a collaborative effort between government, industry, and the public that is compiling a comprehensive database of photovoltaic (PV) installation data for the United States. Data for the project is voluntarily contributed from a variety of sources including utilities, installers, and the general public. The data collected is actively maintained by the contributors and are always changing to provide an evolving, up-to-date snapshot of

  18. Geographic smoothing of solar PV: Results from Gujarat

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

    Klima, Kelly; Apt, Jay

    2015-09-24

    We examine the potential for geographic smoothing of solar photovoltaic (PV) electricity generation using 13 months of observed power production from utility-scale plants in Gujarat, India. To our knowledge, this is the first published analysis of geographic smoothing of solar PV using actual generation data at high time resolution from utility-scale solar PV plants. We use geographic correlation and Fourier transform estimates of the power spectral density (PSD) to characterize the observed variability of operating solar PV plants as a function of time scale. Most plants show a spectrum that is linear in the log–log domain at high frequencies f,more » ranging from f-1.23 to f-1.56 (slopes of -1.23 and -1.56), thus exhibiting more relative variability at high frequencies than exhibited by wind plants. PSDs for large PV plants have a steeper slope than those for small plants, hence more smoothing at short time scales. Interconnecting 20 Gujarat plants yields a f-1.66 spectrum, reducing fluctuations at frequencies corresponding to 6 h and 1 h by 23% and 45%, respectively. Half of this smoothing can be obtained through connecting 4-5 plants; reaching marginal improvement of 1% per added plant occurs at 12-14 plants. The largest plant (322 MW) showed an f-1.76 spectrum. Furthermore, this suggests that in Gujarat the potential for smoothing is limited to that obtained by one large plant.« less

  19. Grid Integrated Distributed PV (GridPV) Version 2.

    SciTech Connect (OSTI)

    Reno, Matthew J.; Coogan, Kyle

    2014-12-01

    This manual provides the documentation of the MATLAB toolbox of functions for using OpenDSS to simulate the impact of solar energy on the distribution system. The majority of the functio ns are useful for interfacing OpenDSS and MATLAB, and they are of generic use for commanding OpenDSS from MATLAB and retrieving information from simulations. A set of functions is also included for modeling PV plant output and setting up the PV plant in th e OpenDSS simulation. The toolbox contains functions for modeling the OpenDSS distribution feeder on satellite images with GPS coordinates. Finally, example simulations functions are included to show potential uses of the toolbox functions. Each function i n the toolbox is documented with the function use syntax, full description, function input list, function output list, example use, and example output.

  20. Evaluating Rooftop Strength for PV

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

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

  1. Time series power flow analysis for distribution connected PV generation.

    SciTech Connect (OSTI)

    Broderick, Robert Joseph; Quiroz, Jimmy Edward; Ellis, Abraham; Reno, Matthew J.; Smith, Jeff; Dugan, Roger

    2013-01-01

    Distributed photovoltaic (PV) projects must go through an interconnection study process before connecting to the distribution grid. These studies are intended to identify the likely impacts and mitigation alternatives. In the majority of the cases, system impacts can be ruled out or mitigation can be identified without an involved study, through a screening process or a simple supplemental review study. For some proposed projects, expensive and time-consuming interconnection studies are required. The challenges to performing the studies are twofold. First, every study scenario is potentially unique, as the studies are often highly specific to the amount of PV generation capacity that varies greatly from feeder to feeder and is often unevenly distributed along the same feeder. This can cause location-specific impacts and mitigations. The second challenge is the inherent variability in PV power output which can interact with feeder operation in complex ways, by affecting the operation of voltage regulation and protection devices. The typical simulation tools and methods in use today for distribution system planning are often not adequate to accurately assess these potential impacts. This report demonstrates how quasi-static time series (QSTS) simulation and high time-resolution data can be used to assess the potential impacts in a more comprehensive manner. The QSTS simulations are applied to a set of sample feeders with high PV deployment to illustrate the usefulness of the approach. The report describes methods that can help determine how PV affects distribution system operations. The simulation results are focused on enhancing the understanding of the underlying technical issues. The examples also highlight the steps needed to perform QSTS simulation and describe the data needed to drive the simulations. The goal of this report is to make the methodology of time series power flow analysis readily accessible to utilities and others responsible for evaluating potential PV impacts.

  2. High-Ti-concentration aerogels for bright x-ray sources (Technical...

    Office of Scientific and Technical Information (OSTI)

    Ti-concentration aerogels for bright x-ray sources Citation Details In-Document Search Title: High-Ti-concentration aerogels for bright x-ray sources Authors: Perez, F ; Patterson,...

  3. High-Ti-concentration aerogels for bright x-ray sources (Technical...

    Office of Scientific and Technical Information (OSTI)

    Ti-concentration aerogels for bright x-ray sources Citation Details In-Document Search Title: High-Ti-concentration aerogels for bright x-ray sources You are accessing a...

  4. Final Report- 1366 Project Silicon: Reclaiming US Silicon PV Leadership

    Broader source: Energy.gov [DOE]

    1366 Technologies’ Project Silicon addresses two of the major goals of the DOE’s PV Manufacturing Initiative Part 2 program: 1) How to reclaim a strong silicon PV manufacturing presence and; 2) How to lower the levelized cost of electricity (“LCOE”) for solar to $0.05-$0.07/kWh, enabling wide-scale U.S. market adoption. To achieve these two goals, US companies must commercialize disruptive, high-value technologies that are capable of rapid scaling, defensible from foreign competition, and suited for US manufacturing. These are the aims of 1366 Technologies Direct Wafer ™ process.

  5. Micro-optics for high-efficiency optical performance and simplified tracking for concentrated photovoltaics (CPV).

    SciTech Connect (OSTI)

    Sinclair, Michael B.; Filatov, Anton; Lentine, Anthony L.; Sweatt, William C.; Nielson, Gregory N.; Okandan, Murat; Jared, Bradley Howell

    2010-02-01

    Micro-optical 5mm lenses in 50mm sub-arrays illuminate arrays of photovoltaic cells with 49X concentration. Fine tracking over {+-}10{sup o} FOV in sub-array allows coarse tracking by meter-sized solar panels. Plastic prototype demonstrated for 400nm < {lambda} < 1600 nm. We have designed a solar collector that will be composed of 50-mm-diameter sub-arrays, each containing {approx}100 5-mm plastic micro-lenses. Each micro-lens illuminates a stack of about four 0.7mm PV cells that collect sunlight from 400nm to 1600 nm with a theoretical efficiency approaching 50%. Each sub-array has internal solar tracking and alignment over a {+-}10{sup o} field, so a large array of sub-arrays only needs to coarsely track the sun. The refractive lenses in the design are thin so the optical transmission can be >90% and the optics will weigh very little. There are other optical properties incorporated in this design that help the photovoltaic cells to operate very efficiently. We are building a pre-prototype system now, and will describe our progress at the conference.

  6. High concentration of deuterium in palladium from plasma ion implantation

    SciTech Connect (OSTI)

    Uhm, H.S.; Lee, W.M. )

    1991-11-01

    Based on a theoretical calculation, a new scheme to increase deuterium density in palladium over its initial value is presented. This deuterium enrichment scheme makes use of plasma ion implantation. A cylindrical palladium rod (target) preloaded with deuterium atoms, coated with a diffusion-barrier material, is immersed in a deuterium plasma. The palladium rod is connected to a high-power modulator which provides a series of negative-voltage pulses. During these negative pulses, deuterium ions fall into the target, penetrate the diffusion barrier, and are implanted inside the palladium. For reasonable system parameters allowed by present technology, it is found from theoretical calculations that the saturation deuterium density after prolonged ion implantation can be several times the palladium atomic number density. Assuming an initial deuterium density, {ital n}{sub 0}=4{times}10{sup 22} cm{sup {minus}3}, it is also found that the deuterium density in palladium can triple its original value within a few days of the ion implantation for a reasonable target size. Because of the small diffusion coefficient in palladium, the incoming ions do not diffuse quickly inward, thereby accumulating near the target surface at the beginning of the implantation.

  7. Transforming PV Installations toward Dispatchable, Schedulable Energy

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

    Solutions | Department of Energy Transforming PV Installations toward Dispatchable, Schedulable Energy Solutions Transforming PV Installations toward Dispatchable, Schedulable Energy Solutions Advanced Energy logo.png -- This project is inactive -- Advanced Energy (AE) will address three important needs in the further deployment of photovoltaic (PV) systems: 1) demonstrating and commercializing a new anti-islanding method utilizing Phasor Measurement Units (PMUs), 2) demonstrating a set of

  8. Selecting Solar: Insights into Residential Photovoltaic (PV)...

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

    Selecting Solar: Insights into Residential Photovoltaic (PV) Quote Variation Carolyn Davidson and Robert Margolis National Renewable Energy Laboratory Technical Report NREL...

  9. Ensuring Quality of PV Modules: Preprint

    SciTech Connect (OSTI)

    Kurtz, S.; Wohlgemuth, J.; Hacke, P.; Kempe, M.; Sample, T.; Yamamichi, M.; Kondo, M.; Doi, T.; Otani, K.; Amano, J.

    2011-07-01

    Photovoltaic (PV) customers need to have confidence in the PV modules they purchase. Currently, no test can quantify a module's lifetime with confidence, but stress tests are routinely used to differentiate PV product designs. We suggest that the industry would be strengthened by using the wisdom of the community to develop a single set of tests that will help customers quantify confidence in PV products. This paper evaluates the need for quality assurance (QA) standards and suggests a path for creating these. Two types of standards are needed: 1) QA of the module design and 2) QA of the manufacturing process.

  10. Riverside Public Utilities - Residential PV Incentive Program...

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

    Riverside Public Utilities Website http:www.riversideca.govutilitiesresi-pv-incentive.asp State California Program Type Rebate Program Rebate Amount 0.50 per watt...

  11. Sandia Rooftop PV Structural Report Webinar

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

    Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid ... Sandia Rooftop PV Structural Report Webinar A roof structure is made ...

  12. CPS Energy- Solar PV Rebate Program

    Broader source: Energy.gov [DOE]

    CPS Energy, San Antonio's municipal utility, offers rebates to customers who install solar photovoltaic (PV) systems on their homes, schools, or businesses. There are four rebate "tiers" available...

  13. The Open PV Project | Open Energy Information

    Open Energy Info (EERE)

    Organization: National Renewable Energy Laboratory Sector: Energy Focus Area: Solar, - Solar PV Topics: Background analysis, Market analysis Resource Type: Dataset, Online...

  14. The Open PV Project | Open Energy Information

    Open Energy Info (EERE)

    National Renewable Energy Laboratory Sector: Energy Focus Area: Solar, - Solar PV Topics: Background analysis, Market analysis Resource Type: Dataset, Online calculator,...

  15. EPRI-Sandia PV Systems Symposium - PV Distribution Systems Modeling Workshop Agenda (draft)

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

    EPRI-Sandia PV Systems Symposium - PV Distribution Systems Modeling Workshop Agenda (draft) PV Distribution System Modeling Workshop - Draft Agenda as of May 1 This one-day workshop, hosted by Sandia National Laboratories, the Electric Power Research Institute (EPRI), and the National Renewable Energy Laboratory, will cover best practices to facilitate integration of PV into the power system. Topics will include technical and policy updates for current interconnection and screening practices and

  16. pv_mapper_091713.mp3 | Department of Energy

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

    pv_mapper_091713.mp3 pv_mapper_091713.mp3 pv_mapper_091713.mp3 Audio icon pv_mapper_091713.mp3 More Documents & Publications PVMapper: A Tool for Energy Siting Final Report - DEVELOPMENT OF AN OPEN SOURCE UTILITY-SCALE SOLAR PROJECT SITING TOOL transcript_pv_mapper.doc

  17. U.S. Aims for Zero-Energy: Support for PV on New Homes

    SciTech Connect (OSTI)

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2006-05-11

    As a market segment for solar photovoltaic (PV) adoption, new homes have a number of attractive attributes. Homebuyers can easily roll the cost of the PV system into their mortgage and, with rebates or other financial incentives, potentially realize an immediate net positive cash flow from the investment. PV system performance can be optimized by taking roof orientation, shading, and other structural factors into account in the design of new homes. Building-integrated photovoltaics (BIPV), which are subject to fewer aesthetic concerns than traditional, rack-mounted systems, are well-suited to new construction applications. In large new residential developments, costs can be reduced through bulk purchases and scale economies in system design and installation. Finally, the ability to install PV as a standard feature in new developments - like common household appliances - creates an opportunity to circumvent the high transaction costs and other barriers typically confronted when each individual homeowner must make a distinct PV purchase decision.

  18. Creating dynamic equivalent PV circuit models with impedance spectroscopy for arc-fault modeling.

    SciTech Connect (OSTI)

    Johnson, Jay Dean; Kuszmaul, Scott S.; Strauch, Jason E.; Schoenwald, David Alan

    2011-06-01

    Article 690.11 in the 2011 National Electrical Code{reg_sign} (NEC{reg_sign}) requires new photovoltaic (PV) systems on or penetrating a building to include a listed arc fault protection device. Currently there is little experimental or empirical research into the behavior of the arcing frequencies through PV components despite the potential for modules and other PV components to filter or attenuate arcing signatures that could render the arc detector ineffective. To model AC arcing signal propagation along PV strings, the well-studied DC diode models were found to inadequately capture the behavior of high frequency arcing signals. Instead dynamic equivalent circuit models of PV modules were required to describe the impedance for alternating currents in modules. The nonlinearities present in PV cells resulting from irradiance, temperature, frequency, and bias voltage variations make modeling these systems challenging. Linearized dynamic equivalent circuits were created for multiple PV module manufacturers and module technologies. The equivalent resistances and capacitances for the modules were determined using impedance spectroscopy with no bias voltage and no irradiance. The equivalent circuit model was employed to evaluate modules having irradiance conditions that could not be measured directly with the instrumentation. Although there was a wide range of circuit component values, the complex impedance model does not predict filtering of arc fault frequencies in PV strings for any irradiance level. Experimental results with no irradiance agree with the model and show nearly no attenuation for 1 Hz to 100 kHz input frequencies.

  19. Ge doped GaN with controllable high carrier concentration for...

    Office of Scientific and Technical Information (OSTI)

    Ge doped GaN with controllable high carrier concentration for plasmonic applications Citation Details In-Document Search Title: Ge doped GaN with controllable high carrier...

  20. Geographic smoothing of solar PV: Results from Gujarat

    SciTech Connect (OSTI)

    Klima, Kelly; Apt, Jay

    2015-09-24

    We examine the potential for geographic smoothing of solar photovoltaic (PV) electricity generation using 13 months of observed power production from utility-scale plants in Gujarat, India. To our knowledge, this is the first published analysis of geographic smoothing of solar PV using actual generation data at high time resolution from utility-scale solar PV plants. We use geographic correlation and Fourier transform estimates of the power spectral density (PSD) to characterize the observed variability of operating solar PV plants as a function of time scale. Most plants show a spectrum that is linear in the log–log domain at high frequencies f, ranging from f-1.23 to f-1.56 (slopes of -1.23 and -1.56), thus exhibiting more relative variability at high frequencies than exhibited by wind plants. PSDs for large PV plants have a steeper slope than those for small plants, hence more smoothing at short time scales. Interconnecting 20 Gujarat plants yields a f-1.66 spectrum, reducing fluctuations at frequencies corresponding to 6 h and 1 h by 23% and 45%, respectively. Half of this smoothing can be obtained through connecting 4-5 plants; reaching marginal improvement of 1% per added plant occurs at 12-14 plants. The largest plant (322 MW) showed an f-1.76 spectrum. Furthermore, this suggests that in Gujarat the potential for smoothing is limited to that obtained by one large plant.

  1. Raising the Bar for Quality PV Modules | Department of Energy

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

    Raising the Bar for Quality PV Modules Raising the Bar for Quality PV Modules October 30, 2014 - 4:58pm Addthis As photovoltaics (PV) markets expand across the United States the...

  2. Jiangsu Zongyi PV Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Name: Jiangsu Zongyi PV Co Ltd Place: Jiangsu Province, China Product: Nantong-based thin-film PV cell producer. References: Jiangsu Zongyi PV Co Ltd1 This article is a...

  3. Inner Mongolia Zhonghuan PV Materials Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    PV Materials Co Ltd Jump to: navigation, search Name: Inner Mongolia Zhonghuan PV Materials Co Ltd Place: Inner Mongolia Autonomous Region, China Product: China-based PV ingot and...

  4. TekSun PV Manufacturing Inc | Open Energy Information

    Open Energy Info (EERE)

    TekSun PV Manufacturing Inc Jump to: navigation, search Name: TekSun PV Manufacturing Inc Place: Austin, Texas Zip: 78701 Product: US-based installer of PV systems; rportedly...

  5. Nvision.Energy - Pernik Solar PV plant | Open Energy Information

    Open Energy Info (EERE)

    Energy - Pernik Solar PV plant Jump to: navigation, search Name Nvision.Energy - Pernik Solar PV plant Facility Nvision.Solar - Pernik Solar PV Plant Sector Solar Facility Type...

  6. Solar PV Permitting and Safety Training Webinar

    Broader source: Energy.gov [DOE]

    This webinar provides training on two permitting resources for municipal inspectors; a prescriptive process for building inspectors and a guidance document for permitting for PV for electrical inspectors. The webinar also runs through a number of key code articles in Massachusetts 2014 electrical code and examines a variety of safety hazards commonly found during or after solar PV installations.

  7. Draft Transcript on Municipal PV Systems

    Broader source: Energy.gov [DOE]

    Webinar on navigating the legal, tax, and finance issues associated with the installation of Municipal PV Systems. The following agenda was developed based on Pat Boylston's experience assisting municipalities with their PV projects and the requests for information that the Solar America City technical team leads have received from many of the 25 Solar America Cities since the April 2008 meeting in Tucson.

  8. Berkeley Program Offers New Option for Financing Residential PV Systems

    SciTech Connect (OSTI)

    Bolinger, Mark A

    2008-07-06

    Readily accessible credit has often been cited as a necessary ingredient to open up the market for residential photovoltaic (PV) systems. Though financing does not reduce the high up-front cost of PV, by spreading that cost over some portion of the system's life, financing can certainly make PV systems more affordable. As a result, a number of states have, in the past, set up special residential loan programs targeting the installation of renewable energy systems and/or energy-efficiency improvements and often featuring low interest rates, longer terms and no-hassle application requirements. Historically, these loan programs have had mixed success (particularly for PV), for a variety of reasons, including a historical lack of homeowner interest in PV, a lack of program awareness, a reduced appeal in a low-interest-rate environment, and a tendency for early PV adopters to be wealthy and not in need of financing. Some of these barriers have begun to fade. Most notably, homeowner interest in PV has grown in some states, particularly those that offer solar rebates. The passage of the Energy Policy Act of 2005 (EPAct 2005), however, introduced one additional roadblock to the success of low-interest PV loan programs: a residential solar investment tax credit (ITC), subject to the Federal government's 'anti-double-dipping' rules. Specifically, the residential solar ITC--equal to 30% of the system's tax basis, capped at $2000--will be reduced or offset if the system also benefits from what is known as 'subsidized energy financing', which is likely to include most government-sponsored low-interest loan programs. Within this context, it has been interesting to note the recent flurry of announcements from a number of U.S cities concerning a new type of PV financing program. Led by the city of Berkeley, Calif., these cities propose to offer their residents the ability to finance the installation of a PV system using increased property tax assessments, rather than a more-traditional credit vehicle, to recover both system and administrative costs. This approach has a number of features that should appeal to PV owners, including long-term, fixed-cost, attractive financing; loans that are tied to the tax capacity of the property rather than to the owner's credit standing; a repayment obligation that transfers along with the sale of the property; and a potential ability to deduct the repayment obligation from federal taxable income as part of the local property tax deduction. For these reasons, Berkeley's program, which was first announced on October 23, 2007, has received considerable nationwide attention in both the trade and general press. Since the announcement, cities from throughout California and the broader U.S. have expressed keen interest in the possibility of replicating this type of program. In California alone, the cities of Santa Cruz, Santa Monica and Palm Desert are all reportedly considering similar programs, while the city of San Francisco has recently announced its own program, portions of which closely parallel Berkeley's approach. In addition, a bill (AB 811) that would authorize all cities in California, not just charter cities like Berkeley, to create this type of program was approved by the California General Assembly on January 29 and is currently under consideration in the State Senate. A similar bill in Colorado (HB 1350) was signed into law on May 28. Elsewhere, the city of Tucson, Arizona has also considered this financing approach.

  9. NREL Study of Fielded PV Systems Demonstrates PV Reliability (Fact Sheet), NREL Highlights in Research & Development, NREL (National Renewable Energy Laboratory)

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

    Photovoltaic module quality has remained high even as module prices have declined. Scientists at the National Renew- able Energy Laboratory (NREL) have analyzed the annual performance data from almost 50,000 photo- voltaic (PV) systems that total 1.7 gigawatts of capacity installed in the United States from 2009 to 2012. The overall conclusion is that the vast majority performed as expected. Since 2009, the price of PV modules has fallen dramatically-and with this drop has come concerns about

  10. PV Ramping in a Distributed Generation Environment: A Study Using Solar Measurements; Preprint

    SciTech Connect (OSTI)

    Sengupta, M.; Keller, J.

    2012-06-01

    Variability in Photovoltaic (PV) generation resulting from variability in the solar radiation over the PV arrays is a topic of continuing concern for those involved with integrating renewables onto existing electrical grids. The island of Lanai, Hawaii is an extreme example of the challenges that integrators will face due to the fact that it is a small standalone grid. One way to study this problem is to take high-resolution solar measurements in multiple locations and model simultaneous PV production for various sizes at those locations. The National Renewable Energy Laboratory (NREL) collected high-resolution solar data at four locations on the island where proposed PV plants will be deployed in the near future. This data set provides unique insight into how the solar radiation may vary between points that are proximal in distance, but diverse in weather, due to the formation of orographic clouds in the center of the island. Using information about each proposed PV plant size, power output was created at high resolution. The team analyzed this output to understand power production ramps at individual locations and the effects of aggregating the production from all four locations. Hawaii is a unique environment, with extremely variable events occurring on a daily basis. This study provided an excellent opportunity for understanding potential worst-case scenarios for PV ramping. This paper provides an introduction to the datasets that NREL collected over a year and a comprehensive analysis of PV variability in a distributed generation scenario.

  11. Experimental comparison of PV-smoothing controllers using distributed generators

    SciTech Connect (OSTI)

    Johnson, Jay Dean; Ellis, Abraham; Denda, Atsushi; Morino, Kimio; Hawkins, John N.; Arellano, Brian; Shinji, Takao; Ogata, Takao; Tadokoro, Masayuki

    2014-02-01

    The power output variability of photovoltaic systems can affect local electrical grids in locations with high renewable energy penetrations or weak distribution or transmission systems. In those rare cases, quick controllable generators (e.g., energy storage systems) or loads can counteract the destabilizing effects by compensating for the power fluctuations. Previously, control algorithms for coordinated and uncoordinated operation of a small natural gas engine-generator (genset) and a battery for smoothing PV plant output were optimized using MATLAB/Simulink simulations. The simulations demonstrated that a traditional generation resource such as a natural gas genset in combination with a battery would smooth the photovoltaic output while using a smaller battery state of charge (SOC) range and extending the life of the battery. This paper reports on the experimental implementation of the coordinated and uncoordinated controllers to verify the simulations and determine the differences in the controllers. The experiments were performed with the PNM PV and energy storage Prosperity site and a gas engine-generator located at the Aperture Center at Mesa Del Sol in Albuquerque, New Mexico. Two field demonstrations were performed to compare the different PV smoothing control algorithms: (1) implementing the coordinated and uncoordinated controls while switching off a subsection of the PV array at precise times on successive clear days, and (2) comparing the results of the battery and genset outputs for the coordinated control on a high variability day with simulations of the coordinated and uncoordinated controls. It was found that for certain PV power profiles the SOC range of the battery may be larger with the coordinated control, but the total amp-hours through the battery-which approximates battery wear-will always be smaller with the coordinated control.

  12. NREL Supports China PV Investment and Financing Alliance to Open...

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

    China PV Investment and Financing Alliance to Open Capital for Solar Deployment May 14, 2015 The Energy Department's National Renewable Energy Laboratory (NREL) and the China PV ...

  13. Pioneer Valley Photovoltaics Cooperative aka PV Squared | Open...

    Open Energy Info (EERE)

    Photovoltaics Cooperative aka PV Squared Jump to: navigation, search Name: Pioneer Valley Photovoltaics Cooperative (aka PV Squared) Place: New Britain, Connecticut Zip: 6051...

  14. Zhejiang Cineng PV Science Technology Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Cineng PV Science Technology Co Ltd Jump to: navigation, search Name: Zhejiang Cineng PV Science & Technology Co Ltd Place: Cixi, Zhejiang Province, China Sector: Solar Product: A...

  15. BIOHAUS PV Handels GmbH | Open Energy Information

    Open Energy Info (EERE)

    GmbH Jump to: navigation, search Name: BIOHAUS PV Handels GmbH Place: Paderborn, Germany Zip: 33100 Product: Distributor of Isofoton PV products in Germany. Coordinates:...

  16. Nvision.Solar - Ravnishte Solar PV Plant | Open Energy Information

    Open Energy Info (EERE)

    Solar - Ravnishte Solar PV Plant Jump to: navigation, search Name Nvision.Solar - Ravnishte Solar PV Plant Facility Ravishte roof and facade mounted solar power plant Sector Solar...

  17. Comparison of a Recurrent Neural Network PV System Model with...

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

    Neural Network PV System Model with a Traditional Component-Based PV System Model Daniel Riley, Sandia National Laboratories, Albuquerque, New Mexico, USA | Ganesh K....

  18. Smart Grid Ready PV Inverters with Utility Communication | Department...

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

    Smart Grid Ready PV Inverters with Utility Communication Smart Grid Ready PV Inverters with Utility Communication EPRI logo.jpg -- This project is inactive -- Electric Power ...

  19. Arima Photovoltaic And Optical Corp Arima PV | Open Energy Information

    Open Energy Info (EERE)

    Photovoltaic And Optical Corp Arima PV Jump to: navigation, search Name: Arima Photovoltaic And Optical Corp (Arima PV) Place: Taipei, Taiwan Product: Once a maker of computers,...

  20. Department of Veterans Affairs, FONSI - Rooftop solar PV power...

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

    Rooftop solar PV power at Calverton National Cemetery Department of Veterans Affairs, FONSI - Rooftop solar PV power at Calverton National Cemetery An Environmental Assessment (EA) ...

  1. Training on PV Systems: Design, Construction, Operation and Maintenanc...

    Open Energy Info (EERE)

    on PV Systems: Design, Construction, Operation and Maintenance Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Training on PV Systems: Design, Construction, Operation...

  2. Linkage to Previous International PV Module QA Task Force Workshops...

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

    Linkage to Previous International PV Module QA Task Force Workshops: Proposal for Rating System Linkage to Previous International PV Module QA Task Force Workshops: Proposal for ...

  3. PV Validation and Bankability Workshop | Department of Energy

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

    PV Validation and Bankability Workshop PV Validation and Bankability Workshop This presentation summarizes the information given by DOE during the Photovoltaic Validation and...

  4. Suzhou Shenglong PV Tech Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Shenglong PV Tech Co Ltd Jump to: navigation, search Name: Suzhou Shenglong PV-Tech Co Ltd Place: Zhangjiagang City, Jiangsu Province, China Zip: 215612 Product: Chinese ingot,...

  5. Smart-Grid Ready PV Inverters with Utility Communication

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

    INTEGRATION Smart-Grid Ready PV Inverters with Utility Communication Electric Power ... required utility communication links to capture the full value of distributed PV plants. ...

  6. Smart-Grid Ready PV Inverter with Utility Communication

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

    Advancement of PV system capabilities, communication systems and open standards, ... Smart-Grid Ready PV Inverter With Utility Communication BRIAN SEAL ELECTRIC POWER ...

  7. Inner Mongolia Dunan PV power | Open Energy Information

    Open Energy Info (EERE)

    Dunan PV power Jump to: navigation, search Name: Inner Mongolia Dunan PV power Place: Inner Mongolia Autonomous Region, China Sector: Solar Product: Inner Mongolia-based solar...

  8. Ningxia Yinxing Energy PV Power Equipment Manufacturing Co Ltd...

    Open Energy Info (EERE)

    Yinxing Energy PV Power Equipment Manufacturing Co Ltd Jump to: navigation, search Name: Ningxia Yinxing Energy PV Power Equipment Manufacturing Co Ltd Place: Yinchuan, Ningxia...

  9. Integrating Solar PV into Energy Services Performance Contracts...

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

    Integrating Solar PV into Energy Services Performance Contracts: Options for Local Governments Nationwide Integrating Solar PV into Energy Services Performance Contracts: Options ...

  10. Statistical and Domain Analytics Applied to PV Module Lifetime...

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

    Statistical and Domain Analytics Applied to PV Module Lifetime and Degradation Science Statistical and Domain Analytics Applied to PV Module Lifetime and Degradation Science ...

  11. Tucson Request for Proposal for 1-5 MW PV PPA

    Broader source: Energy.gov [DOE]

    The mission of Tucson Water, a Department of the City of Tucson (the City), is to ensure that its customers receive high quality water and excellent service in a cost efficient, safe and environmentally responsible manner. In the interest of furthering Tucson Waters mission, the City is seeking a Contractor to finance, design, build, commission, own, operate and maintain up to a 1 megawatt (MW) DCSTC hotovoltaic (PV) system. The City also seeks an option for expanding the PV system up to a total of 5 MW DCSTC PV.

  12. Terawatt Challenge for Thin-Film PV

    SciTech Connect (OSTI)

    Zweibel, K.

    2005-08-01

    The evolution of PV into one of the world's largest industries is not going to happen without major unforeseen problems. However, this study attempts to address the obvious ones, so that we can put aside the mythology of PV (for example, that it is only ''boutique power'' or that one must pave the world with it to be useful) and get on with changing the world's energy infrastructure. With the years of rapid market growth now under way in PV, the author is sure this will not be the last effort to understand the real potential and pitfalls of meeting the Challenge.

  13. Stable, concentrated solutions of high molecular weight polyaniline and articles therefrom

    DOE Patents [OSTI]

    Mattes, Benjamin R.; Wang, Hsing-Lin

    1999-11-09

    Stable, concentrated solutions of high molecular weight polyaniline. In order to process high quality fibers and other articles possessing good mechanical properties, it is known that solution concentrations of the chosen polymer should be in the range from 15-30% (w/w). Moreover, it is desirable to use the highest molecular weight consistent with the solubility properties of the polymer. However, such solutions are inherently unstable, forming gels before processing can be achieved. The present invention describes the addition gel inhibitors (GIs) to the polymer solution, thereby permitting high concentrations (between 15% and 30% (w/w)) of high molecular weight ((M.sub.w)>120,000, and (M.sub.n)>30,000) emeraldine base (EB) polyaniline to be dissolved. Secondary amines have been used for this purpose in concentrations which are small compared to those which might otherwise be used in a cosolvent role therefor. The resulting solutions are useful for generating excellent fibers, films, coatings and other objects, since the solutions are stable for significant time periods, and the GIs are present in too small concentrations to cause polymer deterioration. It is demonstrated that the GIs found to be useful do not act as cosolvents, and that gelation times of the solutions are directly proportional to the concentration of GI. In particular, there is a preferred concentration of GI, which if exceeded causes structural and electrical conductivity degradation of resulting articles. Heating of the solutions significantly improves solubility.

  14. Stable, concentrated solutions of high molecular weight polyaniline and articles therefrom

    DOE Patents [OSTI]

    Mattes, Benjamin R.; Wang, Hsing-Lin

    2000-01-01

    Stable, concentrated solutions of high molecular weight polyaniline. In order to process high quality fibers and other articles possessing good mechanical properties, it is known that solution concentrations of the chosen polymer should be in the range from 15-30% (w/w). Moreover, it is desirable to use the highest molecular weight consistent with the solubility properties of the polymer. However, such solutions are inherently unstable, forming gels before processing can be achieved. The present invention describes the addition gel inhibitors (GIs) to the polymer solution, thereby permitting high concentrations (>15% (w/w)) of high molecular weight ((M.sub.w)>120,000, and (M.sub.n)>30,000) emeraldine base (EB) polyaniline to be dissolved. Secondary amines have been used for this purpose in concentrations which are small compared to those which might otherwise be used in a cosolvent role therefor. The resulting solutions are useful for generating excellent fibers, films, coatings and other objects, since the solutions are stable for significant time periods, and the GIs are present in too small concentrations to cause polymer deterioration. It is demonstrated that the GIs found to be useful do not act as cosolvents, and that gelation times of the solutions are directly proportional to the concentration of GI. In particular, there is a preferred concentration of GI, which if exceeded causes structural and electrical conductivity degradation of resulting articles. Heating of the solutions significantly improves solubility.

  15. Solar Works! In Seattle: Introduction to Solar Electric (PV)

    Broader source: Energy.gov [DOE]

    Presentation slides from residential PV workshop. Also covers general solar resource assessment, siting and financial incentives.

  16. transcript_pv_mapper.doc | Department of Energy

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

    transcript_pv_mapper.doc transcript_pv_mapper.doc transcript_pv_mapper.doc Microsoft Office document icon transcript_pv_mapper.doc More Documents & Publications PVMapper: A Tool for Energy Siting transcript_jedi_model.doc 2009 National Electric Transmission Congestion Study - San Francisco Workshop

  17. Austin Energy- Commercial Solar PV Incentive Program

    Broader source: Energy.gov [DOE]

    In order to qualify for this program, PV modules must be new and be listed on the California Energy Commission's Go Solar web site. In addition, all solar panels must have a 20-year manufacturer ...

  18. Solar Energy International Solar PV 101 Training

    Broader source: Energy.gov [DOE]

    Solar Energy International is offering a five-day training that provides an overview of the three basic PV system applications, primarily focusing on grid-direct systems. The goal of the course is...

  19. NanoPV Corporation | Open Energy Information

    Open Energy Info (EERE)

    Corporation Place: Ewing, New Jersey Zip: 8618 Product: A New Jersey-based thin film PV cell producer and technology provider. Coordinates: 36.638474, -83.428453 Show Map...

  20. SMUD- PV Residential Retrofit Buy-Down

    Broader source: Energy.gov [DOE]

    The incentive can be paid directly to the customer or the installer. PV equipment listed on the CEC Approved Equipment list is eligible for incentives: http://www.gosolarcalifornia.org/equipment...

  1. Distributed PV Permitting and Inspection Processes

    SciTech Connect (OSTI)

    Solar Energy Technologies Office

    2010-08-03

    This presentation summarizes case studies of the time and cost involved in the distributed PV permitting and inspection process in three Solar America Cities, Austin, Portland, and Salt Lake City.

  2. Plumas-Sierra REC- PV Rebate Program

    Broader source: Energy.gov [DOE]

    Plumas-Sierra REC offers an incentive for its customers to install photovoltaic (PV) systems on homes and businesses. Rebates are available for qualifying systems between one kilowatt (kW) and 25...

  3. Merced Irrigation District- PV Buydown Program

    Broader source: Energy.gov [DOE]

    Merced Irrigation District (MID) offers its residential, commercial and non-profit customers a rebate for installing solar electric photovoltaic (PV) systems on their homes and offices. For 2015,...

  4. PV Module Reliability Research (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-06-01

    This National Center for Photovoltaics sheet describes the capabilities of its PV module reliability research. The scope and core competencies and capabilities are discussed and recent publications are listed.

  5. pv land use | OpenEI Community

    Open Energy Info (EERE)

    pv land use Home Rosborne318's picture Submitted by Rosborne318(5) Member 2 December, 2013 - 11:06 Request for Information Renewable Energy GenerationProduction Shreveport Airport...

  6. Sandia Energy - PV Reliability & Performance Model

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

    15-06-01T20:13:00+00:00 This Web Demo model is a simplified "player" version of the Photovoltaic Reliability Performance Model (PV-RPM) currently in development at Sandia National...

  7. Distributed PV Permitting and Inspection Processes

    Broader source: Energy.gov [DOE]

    This presentation summarizes case studies of the time and cost involved in the distributed PV permitting and inspection process in three Solar America Cities, Austin, Portland, and Salt Lake City.

  8. Kansas City Power & Light- Solar PV Rebates

    Broader source: Energy.gov [DOE]

    Note: On March 9, 2016, KCP&L received approval to cease PV rebate payments under this program when a total of $36.5 million in payments have been made, which is expected to occur within the...

  9. City of Lompoc Utilities- PV Rebate Program

    Broader source: Energy.gov [DOE]

    City of Lompoc Utilities provides rebates to its electric customers who purchase and install photovoltaic (PV) systems. The rebate is $1.00 per watt-AC. The incentive amount may not exceed 50% the...

  10. Indium Phosphide Polycrystalline Films on Metal Foil for PV Applications -

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

    Energy Innovation Portal Indium Phosphide Polycrystalline Films on Metal Foil for PV Applications Lawrence Berkeley National Laboratory Contact LBL About This Technology Publications: PDF Document Publication Zheng, M., Yu, Z., Seok, T.J., Chen, Y-Z., Kapadia, R., Takei, K., Aloni, S., Ager, J.W., Wu, M., Chueh, Y-L., Javey, A. "High optical quality polycrystalline indium phosphide grown on metal substrates by metalorganic chemical vapor deposition," Journal of Applied Physics 111,

  11. PV System Energy Evaluation Method (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2014-01-01

    This presentation describes a comparison of the "predicted" energy (based on historical weather data) with the "expected" energy (based on the measured weather data) to determine whether a PV system is performing as modeled in order to verify the accuracy of a model. A key factor in defining this energy test is determining the test boundary so that weather variations are not inadvertently included in what is considered to be PV system performance.

  12. Solar PV Incentive Programs | Department of Energy

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

    PV Incentive Programs Solar PV Incentive Programs This presentation summarizes the information discussed by NYSERDA during the Best Practices in the Design of Utility Solar Programs Webinar on September 27, 2012. PDF icon utility_design_nyserda_mace.pdf More Documents & Publications Best Practices in the Design of Utility Solar Programs NYSERDA's CHP Program Guide, 2010 NYSERDA's RPS Customer Sited Tier Fuel Cell Program

  13. Lessons Learned with Early PV Plant Integration

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

    Lessons Learned with Early PV Plant Integration" Elsa Gonzalez, Rachel Sall, Frankie Greco and David Narang with Arizona Public Service Company June 12, 2014 2 Speakers Frankie Greco Distribution Interconnection Team Arizona Public Service Company Elsa Gonzales Distribution Operations Engineer Arizona Public Service Company David Narang Senior Engineer Arizona Public Service Company Rachel Sall Arizona Public Service Company Lessons Learned with Early PV Plant Integration Elsa Gonzalez

  14. Technology Overview: Concentrator PV 2010 Boot Camp (CPV) (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Bett, A.; Hartsoch, N.

    2010-10-11

    The presentation introduces the various types of CPV technologies and provides a status report of today's CPV companies. Six different architectures of multijunction cells are shown to near or surpass 40% in efficiency. The design space for CPV is quite complex, which is a curse for those trying to narrow it down for the first prototype, but a blessing for those who want multiple pathways for product improvement in coming years.

  15. SUSTAINABLE AND HOLISTIC INTEGRATION OF ENERGY STORAGE AND SOLAR PV

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

    (SHINES) | Department of Energy SUSTAINABLE AND HOLISTIC INTEGRATION OF ENERGY STORAGE AND SOLAR PV (SHINES) SUSTAINABLE AND HOLISTIC INTEGRATION OF ENERGY STORAGE AND SOLAR PV (SHINES) SUSTAINABLE AND HOLISTIC INTEGRATION OF ENERGY STORAGE AND SOLAR PV (SHINES) The Sustainable and Holistic Integration of Energy Storage and Solar PV (SHINES) program develops and demonstrates integrated photovoltaic (PV) and energy storage solutions that are scalable, secure, reliable, and cost-effective. The

  16. DMR (deacetylation and mechanical refining) processing of corn stover achieves high monomeric sugar concentrations (230 g L-1) during enzymatic hydrolysis and high ethanol concentrations (>10% v/v) during fermentation without hydrolysate purification or concentration

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

    Chen, Xiaowen; Kuhn, Erik; Jennings, Edward W.; Nelson, Robert; Tao, Ling; Zhang, Min; Tucker, Melvin P.

    2016-04-01

    Distilling and purifying ethanol and other products from second generation lignocellulosic biorefineries adds significant capital and operating costs to biofuel production. The energy usage associated with distillation negatively affects plant gate costs and causes environmental and life-cycle impacts, and the lower titers in fermentation caused by lower sugar concentrations from pretreatment and enzymatic hydrolysis increase energy and water usage and ethanol production costs. In addition, lower ethanol titers increase the volumes required for enzymatic hydrolysis and fermentation vessels increase capital expenditure (CAPEX). Therefore, increasing biofuel titers has been a research focus in renewable biofuel production for several decades. In thismore » work, we achieved approximately 230 g L-1 of monomeric sugars after high solid enzymatic hydrolysis using deacetylation and mechanical refining (DMR) processed corn stover substrates produced at the 100 kg per day scale. The high sugar concentrations and low chemical inhibitor concentrations achieved by the DMR process allowed fermentation to ethanol with titers as high as 86 g L-1, which translates into approximately 10.9% v/v ethanol. To our knowledge, this is the first time that titers greater than 10% v/v ethanol in fermentations derived from corn stover without any sugar concentration or purification steps have been reported. As a result, the potential cost savings from high sugar and ethanol titers achieved by the DMR process are also reported using TEA analysis.« less

  17. EERE Success Story-Illinois: High-Energy, Concentration-Gradient Cathode

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

    Material for Plug-in Hybrids and All-Electric Vehicles Could Reduce Batteries' Cost and Size | Department of Energy Illinois: High-Energy, Concentration-Gradient Cathode Material for Plug-in Hybrids and All-Electric Vehicles Could Reduce Batteries' Cost and Size EERE Success Story-Illinois: High-Energy, Concentration-Gradient Cathode Material for Plug-in Hybrids and All-Electric Vehicles Could Reduce Batteries' Cost and Size February 10, 2014 - 12:00am Addthis With support from EERE, Argonne

  18. Preparation of a high concentration of lithium-7 atoms in a magneto-optical trap

    SciTech Connect (OSTI)

    Zelener, B. B. Saakyan, S. A.; Sautenkov, V. A.; Manykin, E. A.; Zelener, B. V.; Fortov, V. E.

    2014-11-15

    This study is aimed at obtaining high concentration of optically cooled lithium-7 atoms for preparing strongly interacting ultracold plasma and Rydberg matter. A special setup has been constructed, in which two high-power semiconductor lasers are used to cool lithium-7 atoms in a magneto-optical trap. At an optimum detuning of the cooling laser frequency and a magnetic field gradient of 35 G/cm, the concentration of ultracold lithium-7 atoms reaches about 10{sup 11} cm{sup −3}. Additional independent information about the concentration and number of ultracold lithium-7 atoms on different sublevels of the ground state was obtained by using of an additional probing laser.

  19. PV performance modeling workshop summary report.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Tasca, Coryne Adelle; Cameron, Christopher P.

    2011-05-01

    During the development of a solar photovoltaic (PV) energy project, predicting expected energy production from a system is a key part of understanding system value. System energy production is a function of the system design and location, the mounting configuration, the power conversion system, and the module technology, as well as the solar resource. Even if all other variables are held constant, annual energy yield (kWh/kWp) will vary among module technologies because of differences in response to low-light levels and temperature. A number of PV system performance models have been developed and are in use, but little has been published on validation of these models or the accuracy and uncertainty of their output. With support from the U.S. Department of Energy's Solar Energy Technologies Program, Sandia National Laboratories organized a PV Performance Modeling Workshop in Albuquerque, New Mexico, September 22-23, 2010. The workshop was intended to address the current state of PV system models, develop a path forward for establishing best practices on PV system performance modeling, and set the stage for standardization of testing and validation procedures for models and input parameters. This report summarizes discussions and presentations from the workshop, as well as examines opportunities for collaborative efforts to develop objective comparisons between models and across sites and applications.

  20. Analytical Study of High Concentration PCB Paint at the Heavy Water Components Test Reactor

    SciTech Connect (OSTI)

    Lowry, N.J.

    1998-10-21

    This report provides results of an analytical study of high concentration PCB paint in a shutdown nuclear test reactor located at the US Department of Energy's Savannah River Site (SRS). The study was designed to obtain data relevant for an evaluation of potential hazards associated with the use of and exposure to such paints.

  1. New Berkeley Lab Report Tracks a Decade of PV Installed Cost Trends

    SciTech Connect (OSTI)

    Barbose, Galen; Peterman, Carla; Wiser, Ryan

    2009-04-15

    Installations of PV systems have been expanding at a rapid pace in recent years. In the United States, the market for PV is driven by national, state, and local government incentives, including upfront cash rebates, production-based incentives, requirements that electricity suppliers purchase a certain amount of solar energy, and Federal and state tax benefits. These programs are, in part, motivated by the popular appeal of solar energy and by the positive attributes of PV - e.g., modest environmental impacts, avoidance of fuel price risks, coincidence with peak electrical demand, and the location of PV at the point of use. Given the relatively high cost of PV, however, a key goal of these policies is to encourage cost reductions over time. Therefore, as policy incentives have become more significant and as PV deployment has accelerated, so too has the desire to track the installed cost of PV systems over time, by system characteristics, by system location, and by component. A new Lawrence Berkeley National Laboratory report, 'Tracking the Sun: The Installed Cost of Photovoltaics in the U.S. from 1998-2007', helps to fill this need by summarizing trends in the installed cost (i.e., the cost paid by the system owner) of grid-connected PV systems in the U.S. The report is based on an analysis of project-level cost data from nearly 37,000 residential and non-residential PV systems completed from 1998-2007 and installed on the utility-customer-side of the meter. These systems total 363 MW, equal to 76% of all grid-connected PV capacity installed in the U.S. through 2007, representing the most comprehensive data source available on the installed cost of PV in the United States. The data were obtained from administrators of PV incentive programs around the country, who typically collect installed cost data for systems receiving incentives. A total of 16 programs, spanning 12 states, ultimately provided data for the study. Reflecting the broader geographical trends in the U.S. PV market, the vast majority of the systems in the data sample are located in California (83%, by capacity) and New Jersey (12%), The remaining systems are located in Arizona, Connecticut, Illinois, Massachusetts, Maryland, Minnesota, New York, Oregon, Pennsylvania, and Wisconsin. The PV systems in the dataset range in size from 100 W to 1.3 MW, almost 90% of which are smaller than 10 kW. This article briefly summarizes some of the key findings from the Berkeley Lab study (the full report can be downloaded at http://eetd.lbl.gov/ea/emp/re-pubs.html). The article begins by summarizing trends related to the installed cost of PV systems prior to receipt of any financial incentives, and then discusses how changes in incentive levels over time and variation across states have impacted the net installed cost of PV to the customer, after receipt of incentives. Note that all cost and incentive data are presented in real 2007 dollars (2007$), and all capacity and dollars-perwatt ($/W) data are presented in terms of rated module power output under Standard Test Conditions (DC-STC).

  2. Updating Interconnection Screens for PV System Integration

    SciTech Connect (OSTI)

    Coddington, M.; Mather, B.; Kroposki, B.; Lynn, K.; Razon, A.; Ellis, A.; Hill, R.; Key, T.; Nicole, K.; Smith, J.

    2012-02-01

    This white paper evaluates the origins and usefulness of the capacity penetration screen, offer short-term solutions which could effectively allow fast-track interconnection to many PV system applications, and considers longer-term solutions for increasing PV deployment levels in a safe and reliable manner while reducing or eliminating the emphasis on the penetration screen. Short-term and longer-term alternatives approaches are offered as examples; however, specific modifications to screening procedures should be discussed with stakeholders and must ultimately be adopted by state and federal regulatory bodies.

  3. Investigating Temperature Effects on PV Arrays

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

    Schmidt Unit Title: Circuits and Electricity Subject: Physics Lesson Title: Investigating Temperature Effects on PV Arrays Grade Level(s): 11/12 Date(s): July 18, 2014 Lesson Length: 1 Class Period (65 minutes) * Learning Goal(s) [What should students know, understand, or be able to do as a result of this lab or activity.] Students will be able to measure current and voltage using a Multimeter. Students will be able to calculate the power of a PV array using voltage and current. Students will

  4. Large-Scale PV Integration Study

    SciTech Connect (OSTI)

    Lu, Shuai; Etingov, Pavel V.; Diao, Ruisheng; Ma, Jian; Samaan, Nader A.; Makarov, Yuri V.; Guo, Xinxin; Hafen, Ryan P.; Jin, Chunlian; Kirkham, Harold; Shlatz, Eugene; Frantzis, Lisa; McClive, Timothy; Karlson, Gregory; Acharya, Dhruv; Ellis, Abraham; Stein, Joshua; Hansen, Clifford; Chadliev, Vladimir; Smart, Michael; Salgo, Richard; Sorensen, Rahn; Allen, Barbara; Idelchik, Boris

    2011-07-29

    This research effort evaluates the impact of large-scale photovoltaic (PV) and distributed generation (DG) output on NV Energy’s electric grid system in southern Nevada. It analyzes the ability of NV Energy’s generation to accommodate increasing amounts of utility-scale PV and DG, and the resulting cost of integrating variable renewable resources. The study was jointly funded by the United States Department of Energy and NV Energy, and conducted by a project team comprised of industry experts and research scientists from Navigant Consulting Inc., Sandia National Laboratories, Pacific Northwest National Laboratory and NV Energy.

  5. New Barrier Coating Materials for PV Module Backsheets: Preprint

    SciTech Connect (OSTI)

    Barber, G. D.; Jorgensen, G. J.; Terwilliger, K.; Glick, S. H.; Pern, J.; McMahon, T. J.

    2002-05-01

    This conference paper describes the high moisture barrier high resistivity coatings on polyethylene terepthalate (PET) have been fabricated and characterized for use in PV module back sheet applications. These thin film barriers exhibit water vapor transmission rates (WVTR) as low as 0.1 g/m2-day at 37.8 C and have shown excellent adhesion (> 10 N/mm) to both ethylene vinyl acetate (EVA) and PET even after filtered xenon arc lamp UV exposure. The WVTR and adhesion values for this construction are compared to and shown to be superior to candidate polymeric backsheet materials.

  6. International PV QA Task Force's Proposed Comparative Rating System for PV Modules: Preprint

    SciTech Connect (OSTI)

    Wohlgemuth, J.; Kurtz, S.

    2014-10-01

    The International PV Quality Assurance Task Force is developing a rating system that provides comparative information about the relative durability of PV modules. Development of accelerated stress tests that can provide such comparative information is seen as a major step toward being able to predict PV module service life. This paper will provide details of the ongoing effort to determine the format of such an overall module rating system. The latest proposal is based on using three distinct climate zones as defined in IEC 60721-2-1 for two different mounting systems. Specific stresses beyond those used in the qualification tests are being developed for each of the selected climate zones.

  7. A Survey of State and Local PV Program Response to Financial Innovation and Disparate Federal Tax Treatment in the Residential PV Sector

    SciTech Connect (OSTI)

    Bolinger, Mark; Holt, Edward

    2015-06-01

    High up-front costs and a lack of financing options have historically been the primary barriers to the adoption of photovoltaics (PV) in the residential sector. State clean energy funds, which emerged in a number of states from the restructuring of the electricity industry in the mid-to-late 1990s, have for many years attempted to overcome these barriers through PV rebate and, in some cases, loan programs. While these programs (rebate programs in particular) have been popular, the residential PV market in the United States only started to achieve significant scale in the last five years – driven in large part by an initial wave of financial innovation that led to the rise of third-party ownership.

  8. Breakout Session: A Look Ahead: PV Manufacturing in 10 Years

    Broader source: Energy.gov [DOE]

    The global PV manufacturing landscape has undergone significant changes in the past decade, from geographic and economic changes in the supply chain to a significant increase in PV module...

  9. Masdar PV GmbH | Open Energy Information

    Open Energy Info (EERE)

    Masdar PV GmbH Place: Germany Product: Germany-based manufacturer of thin film photovoltaic products and solutions References: Masdar PV GmbH1 This article is a stub. You...

  10. Breakout Session: Getting in the Loop: PV Hardware Recycling...

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

    Getting in the Loop: PV Hardware Recycling and Sustainability Breakout Session: Getting in the Loop: PV Hardware Recycling and Sustainability May 21, 2014 6:30PM to 7:30PM PDT ...

  11. Jiangsu Tianbao PV Energy Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Tianbao PV Energy Co Ltd Jump to: navigation, search Name: Jiangsu Tianbao PV Energy Co Ltd Place: Yizheng, Jiangsu Province, China Product: Reportedly planning to have 25MW of...

  12. NREL: Photovoltaics Research - NREL Hosts PV Module Reliability Workshop

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

    for Industry Hosts PV Module Reliability Workshop for Industry March 1, 2016 Nearly 200 researchers from more than 100 companies and representing 16 countries attended the 7th annual PV Module Reliability Workshop, held Feb. 23-25, 2016, in Golden, Colo. The program was designed by the National Renewable Energy Laboratory (NREL) in collaboration with Sandia National Laboratories and the photovoltaic (PV) industry. "NREL's PV Module Reliability Workshop is unique in its requirement for

  13. NREL: Solar Research - NREL Hosts PV Module Reliability Workshop for

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

    Industry NREL Hosts PV Module Reliability Workshop for Industry March 1, 2016 Nearly 200 researchers from more than 100 companies and representing 16 countries attended the 7th annual PV Module Reliability Workshop, held Feb. 23-25, 2016, in Golden, Colo. The program was designed by the National Renewable Energy Laboratory (NREL) in collaboration with Sandia National Laboratories and the photovoltaic (PV) industry. "NREL's PV Module Reliability Workshop is unique in its requirement for

  14. NREL: Workforce Development and Education Programs - NREL Hosts PV Module

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

    Reliability Workshop for Industry NREL Hosts PV Module Reliability Workshop for Industry March 1, 2016 Nearly 200 researchers from more than 100 companies and representing 16 countries attended the 7th annual PV Module Reliability Workshop, held Feb. 23-25, 2016, in Golden, Colo. The program was designed by the National Renewable Energy Laboratory (NREL) in collaboration with Sandia National Laboratories and the photovoltaic (PV) industry. "NREL's PV Module Reliability Workshop is

  15. Modeling Distribution Connected PV and Interconnection Study Analysis

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

    2014-15322PE Impact of PV Variability and Ramping Events on Distribution Voltage Regulation Equipment Matthew J. Reno 1,2 , Kyle Coogan 1 , Robert J. Broderick 2 , John Seuss 1 , Santiago Grijalva 1 1 Georgia Institute of Technology 2 Sandia National Laboratories Introduction  As the penetration of PV increases on the distribution system, there is rising concern about the interaction between PV variability and the system voltage regulation equipment.  The impact of PV variability on

  16. Single-molecule imaging at high fluorophore concentrations by local activation of dye

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

    Geertsema, Hylkje J.; Mangel, Walter F.; Schulte, Aartje C.; Spenkelink, Lisanne M.; McGrath, William J.; Morrone, Seamus R.; Sohn, Jungsan; Robinson, Andrew; van Oijen, Antoine M.

    2015-02-17

    Single-molecule fluorescence microscopy is a powerful approach to observe biomolecular interactions with high spatial and temporal resolution. Detecting fluorescent signals from individual, labeled proteins above high levels of background fluorescence remains challenging, however. For this reason, the concentrations of labeled proteins in in vitro assays are often kept low compared to their in vivo concentrations. Here, we present a new fluorescence imaging technique by which single fluorescent molecules can be observed in real time at high, physiologically relevant concentrations. The technique requires a protein and its macromolecular substrate to be labeled each with a different fluorophore. Then, making use ofmore » short-distance energy-transfer mechanisms, the fluorescence from only those proteins bound to their substrate are selectively activated. This approach is demonstrated by labeling a DNA substrate with an intercalating stain, exciting the stain, and using energy transfer from the stain to activate the fluorescence of only those labeled DNA-binding proteins bound to the DNA. Such an experimental design allowed us to observe the sequence-independent interaction of Cy5-labeled interferon-inducible protein 16 (IFI16) with DNA and the sliding via one-dimensional diffusion of Cy5-labeled adenovirus protease (pVIc-AVP) on DNA in the presence of a background of hundreds of nM Cy5 fluorophore.« less

  17. Solar Photovoltaic (PV) System Permit Application Checklist

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Permit Application Checklist is intended to be used as a best management practice when establishing local government requirements for residential and commercial solar photovoltaic (PV) system permits. Local governments may modify this checklist to accommodate their local ordinances, code requirements, and permit procedures.

  18. Final Technical Report: PV Fault Detection Tool.

    SciTech Connect (OSTI)

    King, Bruce Hardison; Jones, Christian Birk

    2015-12-01

    The PV Fault Detection Tool project plans to demonstrate that the FDT can (a) detect catastrophic and degradation faults and (b) identify the type of fault. This will be accomplished by collecting fault signatures using different instruments and integrating this information to establish a logical controller for detecting, diagnosing and classifying each fault.

  19. Transforming PV Installations Toward Dispatchable, Schedulable...

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

    PV insTallaTions Toward disPaTchable, schedulable energy soluTions MIChAEl MIllS-PrICE, SEGIS-AC ProGrAM MAnAGEr, AE SolAr EnErGy A B C N SATCON518kw1 B2+2 Cap Bank ...

  20. Role of Polycrystalline Thin-Film PV Technologies in Competitive PV Module Markets: Preprint

    SciTech Connect (OSTI)

    von Roedern, B.; Ullal, H. S.

    2008-05-01

    This paper discusses the developments in thin-film PV technologies and provides an outlook on future commercial module efficiencies achievable based on today's knowledge about champion cell performance.

  1. PV Performance and Reliability Validation Capabilities at Sandia National

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

    Laboratories | Department of Energy Performance and Reliability Validation Capabilities at Sandia National Laboratories PV Performance and Reliability Validation Capabilities at Sandia National Laboratories This presenation summarizes the information discussed by Sandia National Laboratories at the PV Manufacturing Workshop, March 25, 2011. PDF icon pv_manufacturing_workshop_2011_march_granata.pdf More Documents & Publications Federal Energy Management Program Report Template

  2. Potential Induced Degradation (PID) Tests for Commercially Available PV

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

    Modules | Department of Energy ps4_aist_doi.pdf More Documents & Publications EXPERIENCES ON PID TESTING OF PV MODULES IN 2012 PID-free C-Si PV Module Using Novel Chemically-Tempered Glass Agenda for the PV Module Reliability Workshop, February 26 - 27 2013, Golden, Colorado

  3. Ota City : characterizing output variability from 553 homes with residential PV systems on a distribution feeder.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Miyamoto, Yusuke; Nakashima, Eichi; Lave, Matthew

    2011-11-01

    This report describes in-depth analysis of photovoltaic (PV) output variability in a high-penetration residential PV installation in the Pal Town neighborhood of Ota City, Japan. Pal Town is a unique test bed of high-penetration PV deployment. A total of 553 homes (approximately 80% of the neighborhood) have grid-connected PV totaling over 2 MW, and all are on a common distribution line. Power output at each house and irradiance at several locations were measured once per second in 2006 and 2007. Analysis of the Ota City data allowed for detailed characterization of distributed PV output variability and a better understanding of how variability scales spatially and temporally. For a highly variable test day, extreme power ramp rates (defined as the 99th percentile) were found to initially decrease with an increase in the number of houses at all timescales, but the reduction became negligible after a certain number of houses. Wavelet analysis resolved the variability reduction due to geographic diversity at various timescales, and the effect of geographic smoothing was found to be much more significant at shorter timescales.

  4. Method for implantation of high dopant concentrations in wide band gap materials

    DOE Patents [OSTI]

    Usov, Igor; Arendt, Paul N.

    2009-09-15

    A method that combines alternate low/medium ion dose implantation with rapid thermal annealing at relatively low temperatures. At least one dopant is implanted in one of a single crystal and an epitaxial film of the wide band gap compound by a plurality of implantation cycles. The number of implantation cycles is sufficient to implant a predetermined concentration of the dopant in one of the single crystal and the epitaxial film. Each of the implantation cycles includes the steps of: implanting a portion of the predetermined concentration of the one dopant in one of the single crystal and the epitaxial film; annealing one of the single crystal and the epitaxial film and implanted portion at a predetermined temperature for a predetermined time to repair damage to one of the single crystal and the epitaxial film caused by implantation and activates the implanted dopant; and cooling the annealed single crystal and implanted portion to a temperature of less than about 100.degree. C. This combination produces high concentrations of dopants, while minimizing the defect concentration.

  5. High Efficiency Nanostructured III-V Photovoltaics for Solar Concentrator Application

    SciTech Connect (OSTI)

    Hubbard, Seth

    2012-09-12

    The High Efficiency Nanostructured III-V Photovoltaics for Solar Concentrators project seeks to provide new photovoltaic cells for Concentrator Photovoltaics (CPV) Systems with higher cell efficiency, more favorable temperature coefficients and less sensitivity to changes in spectral distribution. The main objective of this project is to provide high efficiency III-V solar cells that will reduce the overall cost per Watt for power generation using CPV systems.This work is focused both on a potential near term application, namely the use of indium arsenide (InAs) QDs to spectrally "tune" the middle (GaAs) cell of a SOA triple junction device to a more favorable effective bandgap, as well as the long term goal of demonstrating intermediate band solar cell effects. The QDs are confined within a high electric field i-region of a standard GaAs solar cell. The extended absorption spectrum (and thus enhanced short circuit current) of the QD solar cell results from the increase in the sub GaAs bandgap spectral response that is achievable as quantum dot layers are introduced into the i-region. We have grown InAs quantum dots by OMVPE technique and optimized the QD growth conditions. Arrays of up to 40 layers of strain balanced quantum dots have been experimentally demonstrated with good material quality, low residual stain and high PL intensity. Quantum dot enhanced solar cells were grown and tested under simulated one sun AM1.5 conditions. Concentrator solar cells have been grown and fabricated with 5-40 layers of QDs. Testing of these devices show the QD cells have improved efficiency compared to baseline devices without QDs. Device modeling and measurement of thermal properties were performed using Crosslight APSYS. Improvements in a triple junction solar cell with the insertion of QDs into the middle current limiting junction was shown to be as high as 29% under one sun illumination for a 10 layer stack QD enhanced triple junction solar cell. QD devices have strong potential for net gains in efficiency at high concentration.

  6. Sandia PV Array Performance Model

    Broader source: Energy.gov [DOE]

    The photovoltaic array performance model was developed at Sandia National Laboratories over the last twelve years. Electrical, thermal, and optical characteristics for photovoltaic modules are included in the model, and the model is designed to use hourly solar resource and meteorological data. The versatility and accuracy of the model has been validated for flat-plate modules (all technologies) and for concentrator modules, as well as for large arrays of modules. Applications include system design and sizing, ‘translation’ of field performance measurements to standard reporting conditions, system performance optimization, and real-time comparison of measured versus expected system performance.

  7. Integrating Solar PV in Utility System Operations: Analytical Framework and Arizona Case Study

    SciTech Connect (OSTI)

    Wu, Jing; Botterud, Audun; Mills, Andrew; Zhou, Zhi; Hodge, Bri-Mathias; Mike, Heaney

    2015-06-01

    A systematic framework is proposed to estimate the impact on operating costs due to uncertainty and variability in renewable resources. The framework quantifies the integration costs associated with subhourly variability and uncertainty as well as day-ahead forecasting errors in solar PV (photovoltaics) power. A case study illustrates how changes in system operations may affect these costs for a utility in the southwestern United States (Arizona Public Service Company). We conduct an extensive sensitivity analysis under different assumptions about balancing reserves, system flexibility, fuel prices, and forecasting errors. We find that high solar PV penetrations may lead to operational challenges, particularly during low-load and high solar periods. Increased system flexibility is essential for minimizing integration costs and maintaining reliability. In a set of sensitivity cases where such flexibility is provided, in part, by flexible operations of nuclear power plants, the estimated integration costs vary between $1.0 and $4.4/MWh-PV for a PV penetration level of 17%. The integration costs are primarily due to higher needs for hour-ahead balancing reserves to address the increased sub-hourly variability and uncertainty in the PV resource. (C) 2015 Elsevier Ltd. All rights reserved.

  8. Steady-state, high-dose neutron generation and concentration apparatus and method for deuterium atoms

    SciTech Connect (OSTI)

    Uhm, H.S.; Lee, W.M.

    1991-01-01

    A steady-state source of neutrons is produced within an electrically grounded and temperature controlled chamber confining tritium or deuterium plasma at a predetermined density to effect implantation of ions in the surface of a palladium target rod coated with diffusion barrier material and immersed in such plasma. The rod is enriched with a high concentration of deuterium atoms after a prolonged plasma ion implantation. Collision of the deuterium atoms in the target by impinging ions of the plasma initiates fusion reactions causing emission of neutrons during negative voltage pulses applied to the rod through a high power modulator. The neutrons are so generated at a relatively high dose rate under optimized process conditions.

  9. PV_LIB Toolbox v. 1.3

    Energy Science and Technology Software Center (OSTI)

    2015-12-09

    PV_LIB comprises a library of Matlab? code for modeling photovoltaic (PV) systems. Included are functions to compute solar position and to estimate irradiance in the PV system’s plane of array, cell temperature, PV module electrical output, and conversion from DC to AC power. Also included are functions that aid in determining parameters for module performance models from module characterization testing. PV_LIB is open source code primarily intended for research and academic purposes. All algorithms aremore » documented in openly available literature with the appropriate references included in comments within the code.« less

  10. Performance of a High-Concentration Erbium-Doped Fiber Amplifier with 100 nm Amplification Bandwidth

    SciTech Connect (OSTI)

    Hajireza, P.; Shahabuddin, N. S.; Abbasi-Zargaleh, S.; Emami, S. D.; Abdul-Rashid, H. A.; Yusoff, Z.

    2010-07-07

    Increasing demand for higher bandwidth has driven the need for higher Wavelength Division Multiplexing (WDM) channels. One of the requirements to achieve this is a broadband amplifier. This paper reports the performance of a broadband, compact, high-concentration and silica-based erbium-doped fiber amplifier. The amplifier optimized to a 2.15 m long erbium-doped fiber with erbium ion concentration of 2000 ppm. The gain spectrum of the amplifier has a measured amplification bandwidth of 100 nm using a 980 nm laser diode with power of 150 mW. This silica-based EDFA shows lower noise figure, higher gain and wider bandwidth in shorter wavelengths compared to Bismuth-based EDFA with higher erbium ion concentration of 3250 ppm at equivalent EDF length. The silica-based EDF shows peak gain at 22 dB and amplification bandwidth between 1520 nm and 1620 nm. The lowest noise figure is 5 dB. The gain is further improved with the implementation of enhanced EDFA configurations.

  11. Cascaded Microinverter PV System for Reduced Cost

    SciTech Connect (OSTI)

    Bellus, Daniel R.; Ely, Jeffrey A.

    2013-04-29

    In this project, a team led by Delphi will develop and demonstrate a novel cascaded photovoltaic (PV) inverter architecture using advanced components. This approach will reduce the cost and improve the performance of medium and large-sized PV systems. The overall project objective is to develop, build, and test a modular 11-level cascaded three-phase inverter building block for photovoltaic applications and to develop and analyze the associated commercialization plan. The system will be designed to utilize photovoltaic panels and will supply power to the electric grid at 208 VAC, 60 Hz 3-phase. With the proposed topology, three inverters, each with an embedded controller, will monitor and control each of the cascade sections, reducing costs associated with extra control boards. This report details the final disposition on this project.

  12. Photovoltaic Regional Testing Center (PV RTC)

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

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

  13. Lessons Learned with Early PV Plant Integration

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

    Lessons Learned with Early PV Plant Integration Page 1 of 23 Kristen Ardani (NREL), Elsa Gonzales (Arizona Public Service Company), Rachel Sall (Arizona Public Service Company), Frankie Greco (Arizona Public Service Company), David Narang (Arizona Public Service Company) Page 1 of 23 [Speaker: Kristen Ardani] Cover Slide: Thank you everyone for joining us today for the DG Interconnection Collaborative informational webinar. Today we have speakers from Arizona Public Service Company, who will

  14. Integrating Solar PV in Utility System Operations

    SciTech Connect (OSTI)

    Mills, A.; Botterud, A.; Wu, J.; Zhou, Z.; Hodge, B-M.; Heany, M.

    2013-10-31

    This study develops a systematic framework for estimating the increase in operating costs due to uncertainty and variability in renewable resources, uses the framework to quantify the integration costs associated with sub-hourly solar power variability and uncertainty, and shows how changes in system operations may affect these costs. Toward this end, we present a statistical method for estimating the required balancing reserves to maintain system reliability along with a model for commitment and dispatch of the portfolio of thermal and renewable resources at different stages of system operations. We estimate the costs of sub-hourly solar variability, short-term forecast errors, and day-ahead (DA) forecast errors as the difference in production costs between a case with “realistic” PV (i.e., subhourly solar variability and uncertainty are fully included in the modeling) and a case with “well behaved” PV (i.e., PV is assumed to have no sub-hourly variability and can be perfectly forecasted). In addition, we highlight current practices that allow utilities to compensate for the issues encountered at the sub-hourly time frame with increased levels of PV penetration. In this analysis we use the analytical framework to simulate utility operations with increasing deployment of PV in a case study of Arizona Public Service Company (APS), a utility in the southwestern United States. In our analysis, we focus on three processes that are important in understanding the management of PV variability and uncertainty in power system operations. First, we represent the decisions made the day before the operating day through a DA commitment model that relies on imperfect DA forecasts of load and wind as well as PV generation. Second, we represent the decisions made by schedulers in the operating day through hour-ahead (HA) scheduling. Peaking units can be committed or decommitted in the HA schedules and online units can be redispatched using forecasts that are improved relative to DA forecasts, but still imperfect. Finally, we represent decisions within the operating hour by schedulers and transmission system operators as real-time (RT) balancing. We simulate the DA and HA scheduling processes with a detailed unit-commitment (UC) and economic dispatch (ED) optimization model. This model creates a least-cost dispatch and commitment plan for the conventional generating units using forecasts and reserve requirements as inputs. We consider only the generation units and load of the utility in this analysis; we do not consider opportunities to trade power with neighboring utilities. We also do not consider provision of reserves from renewables or from demand-side options. We estimate dynamic reserve requirements in order to meet reliability requirements in the RT operations, considering the uncertainty and variability in load, solar PV, and wind resources. Balancing reserve requirements are based on the 2.5th and 97.5th percentile of 1-min deviations from the HA schedule in a previous year. We then simulate RT deployment of balancing reserves using a separate minute-by-minute simulation of deviations from the HA schedules in the operating year. In the simulations we assume that balancing reserves can be fully deployed in 10 min. The minute-by-minute deviations account for HA forecasting errors and the actual variability of the load, wind, and solar generation. Using these minute-by-minute deviations and deployment of balancing reserves, we evaluate the impact of PV on system reliability through the calculation of the standard reliability metric called Control Performance Standard 2 (CPS2). Broadly speaking, the CPS2 score measures the percentage of 10-min periods in which a balancing area is able to balance supply and demand within a specific threshold. Compliance with the North American Electric Reliability Corporation (NERC) reliability standards requires that the CPS2 score must exceed 90% (i.e., the balancing area must maintain adequate balance for 90% of the 10-min periods). The combination of representing DA forecast errors in the DA commitments, using 1-min PV data to simulate RT balancing, and estimates of reliability performance through the CPS2 metric, all factors that are important to operating systems with increasing amounts of PV, makes this study unique in its scope.

  15. Method and source for producing a high concentration of positively charged molecular hydrogen or deuterium ions

    DOE Patents [OSTI]

    Ehlers, Kenneth W.; Leung, Ka-Ngo

    1988-01-01

    A high concentration of positive molecular ions of hydrogen or deuterium gas is extracted from a positive ion source having a short path length of extracted ions, relative to the mean free path of the gas molecules, to minimize the production of other ion species by collision between the positive ions and gas molecules. The ion source has arrays of permanent magnets to produce a multi-cusp magnetic field in regions remote from the plasma grid and the electron emitters, for largely confining the plasma to the space therebetween. The ion source has a chamber which is short in length, relative to its transverse dimensions, and the electron emitters are at an even shorter distance from the plasma grid, which contains one or more extraction apertures.

  16. Improved high temperature solar absorbers for use in Concentrating Solar Power central receiver applications.

    SciTech Connect (OSTI)

    Stechel, Ellen Beth; Ambrosini, Andrea; Hall, Aaron Christopher; Lambert, Timothy L.; Staiger, Chad Lynn; Bencomo, Marlene

    2010-09-01

    Concentrating solar power (CSP) systems use solar absorbers to convert the heat from sunlight to electric power. Increased operating temperatures are necessary to lower the cost of solar-generated electricity by improving efficiencies and reducing thermal energy storage costs. Durable new materials are needed to cope with operating temperatures >600 C. The current coating technology (Pyromark High Temperature paint) has a solar absorptance in excess of 0.95 but a thermal emittance greater than 0.8, which results in large thermal losses at high temperatures. In addition, because solar receivers operate in air, these coatings have long term stability issues that add to the operating costs of CSP facilities. Ideal absorbers must have high solar absorptance (>0.95) and low thermal emittance (<0.05) in the IR region, be stable in air, and be low-cost and readily manufacturable. We propose to utilize solution-based synthesis techniques to prepare intrinsic absorbers for use in central receiver applications.

  17. Real Power and Reactive Power Control of a Three-Phase Single-Stage-PV System and PV voltage Stability

    SciTech Connect (OSTI)

    Li, Huijuan; Xu, Yan; Adhikari, Sarina; Rizy, D Tom; Li, Fangxing; Irminger, Philip

    2012-01-01

    Grid-connected photovoltaic (PV) systems with power electronic interfaces can provide both real and reactive power to meet power system needs with appropriate control algorithms. This paper presents the control algorithm design for a three-phase single-stage grid-connected PV inverter to achieve either maximum power point tracking (MPPT) or a certain amount of real power injection, as well as the voltage/var control. The switching between MPPT control mode and a certain amount of real power control mode is automatic and seamless. Without the DC-to-DC booster stage, PV DC voltage stability is an important issue in the control design especially when the PV inverter is operating at maximum power point (MPP) with voltage/var control. The PV DC voltage collapse phenomenon and its reason are discussed. The method based on dynamic correction of the PV inverter output is proposed to ensure PV DC voltage stability. Simulation results of the single-stage PV system during system disturbances and fast solar irradiation changes confirm that the proposed control algorithm for single-stage PV inverters can provide appropriate real and reactive power services and ensure PV DC voltage stability during dynamic system operation and atmospheric conditions.

  18. PROJECT PROFILE: Concentrating Solar Power in a SunShot Future (SuNLaMP) |

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

    Department of Energy Renewable Energy Laboratory, Golden, CO SunShot Award Amount: $612,500 This project will investigate concentrating solar power (CSP) and its ability to increase the overall penetration of solar energy while lessening the variability impacts of solar photovoltaics (PV). CSP is unique among solar technologies in that it can provide dispatchable energy through high-efficiency thermal energy storage. Researchers at the National Renewable Energy Laboratory (NREL) will analyze

  19. NREL Helps Establish New PV Quality Standards for Manufacturers - News

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

    Releases | NREL Helps Establish New PV Quality Standards for Manufacturers February 8, 2016 Working with partners around the world, researchers at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) have completed five years of work toward helping establish an international quality standard for manufacturing photovoltaic (PV) modules. PV manufacturers will use the new standard to increase the level of confidence investors, utilities, and consumers have in solar panel

  20. Method and source for producing a high concentration of positively charged molecular hydrogen or deuterium ions

    DOE Patents [OSTI]

    Ehlers, K.W.; Leung, K.N.

    1983-07-26

    One principal object of the present invention is to provide a novel method and apparatus for generating a high concentration of H/sub 2//sup +/ or D/sub 2//sup +/ ions by using a new and improved multicusp ion source. The basic principle in achieving a high percentage of H/sub 2//sup +/ or D/sub 2//sup +/ ions is to extract them from the source as soon as they are produced. Otherwise they will react with background gas molecules to form tri-atomic ions H/sub 3//sup +/ or D/sub 3//sup +/ or be dissociated by electrons. The former reaction H/sub 2//sup +/ + H/sub 2/ ..-->.. H/sub 3//sup +/ + H can have a very short mean free path length lambda. Assuming a background neutral gas density of approximately 3.3 x 10/sup 13/ cm/sup -3/ and a cross-section sigma of approximately 6 x 10/sup -15/ cm/sup 2/, lambda = (n/sub 0/ sigma)/sup -1/ is estimated to be about 5 cm. Thus the distance traversed by the H/sub 2//sup +/ ion before it arrives at the extractor electrode cannot exceed this value. This in turn sets a limit on the length of the source chamber.

  1. Global Solar Photovoltaic (PV) Installation Market to be Propelled...

    Open Energy Info (EERE)

    Global Solar Photovoltaic (PV) Installation Market to be Propelled by Greater Concerns over Carbon Footprint Home > Groups > Renewable Energy RFPs John55364's picture Submitted by...

  2. Zhangjiagang Sunlink PV Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Province, China Zip: 215600 Product: Specialises in developing, manufacturing and marketing of crystalline silicon PV products. Coordinates: 31.950001, 120.449997 Show Map...

  3. NREL Releases Report Describing Guidelines for PV Manufacturer...

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

    producing modules on an industrial scale so they can increase investor, utility, and consumer confidence in PV system ... feeling pressure to lower prices, it is essential that ...

  4. Compressive Shear Test to Accurately Measure Adhesion of PV Encapsulan...

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

    ps2epflgalliano.pdf More Documents & Publications Agenda for the PV Module Reliability Workshop, February 26 - 27 2013, Golden, Colorado Hail Impact Testing on Crystalline Si ...

  5. Weathering Performance of PV Backsheets | Department of Energy

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

    Accelerated Laboratory Tests Using Simultaneous UV, Temperature, and Moisture for PV ... Sheet, Noryl PPE Sheet-Back Sheet Test Procedure for UV Weathering Resistance of Backsheet

  6. Sandia/EPRI PV Symposium - Save the Date!

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

    Existing and emerging codes, standards, rules, and procedures that affect solar deployment in utility distribution systems. Come learn about: o PV Data and Modeling Needs for...

  7. NY-Sun PV Incentive Program (Residential and Small Business)...

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

    NY-Sun CommercialIndustrial Incentive program that offers incentives for grid connected PV systems larger than 200 KW. The New York State Energy Research and Development...

  8. Instrumentation for Evaluating PV System Performance Losses from Snow: Preprint

    SciTech Connect (OSTI)

    Marion, B.; Rodriguez, J.; Pruett, J.

    2009-04-01

    Describes the use of a pyranometer with a heater and a digital camera to determine losses related to snow for PV systems located at National Renewable Energy Laboratory.

  9. PROJECT PROFILE: Improving PV performance Estimates in the System...

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

    This project will improve the forecasting of lifetime PV system performance as well as operations and maintenance costs by incorporating the Photovoltaic Reliability and ...

  10. PV QA Task Group #2: Thermal and Mechanical Fatigue Including...

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

    for Rating System Agenda for the PV Module Reliability Workshop, February 26 - 27 2013, Golden, Colorado Accelerated Stress Testing, Qualification Testing, HAST, Field Experience

  11. Utility Participation in the Rooftop Solar PV Market Transcript

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

    Utility Participation in the Rooftop Solar PV Market Page 1 of 21 Kristen Ardani, Jurstin ... from two Arizona utilities that have implemented utility owned rooftop solar programs. ...

  12. Sandia Energy - Sandia PV Team Publishes Book Chapter

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

    Book Chapter Previous Next Sandia PV Team Publishes Book Chapter The book, Solar Energy Forecasting and Resource Assessment, provides an authoritative voice on the...

  13. Global Gathering Addresses PV Role in Energy Prosperity and Climate...

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

    An increasingly flexible electricity grid, increased availability of low-cost energy storage and demand-side management also will play key roles in enabling accelerated PV ...

  14. Overview of the PV Module Model in PVWatts (Presentation)

    SciTech Connect (OSTI)

    Marion, B.

    2010-09-22

    Overview of the PV module model. PVWatts module power estimates were compared with those using the Sandia model for three modules and data sets.

  15. Enhanced Modeling and Monitoring Tools for Distributed PV Interconnect...

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

    GTM * Hear an example of how a municipal utility is planning for solar interconnection and roadmapping the future of PV integration o Mark Rawson, Sacramento Municipal Utilities ...

  16. Sandia Energy - Photovoltaic (PV) Regional Test Center (RTC)...

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

    Photovoltaic (PV) Regional Test Center (RTC) Website Goes Live Home Renewable Energy Energy Partnership News SunShot News & Events Photovoltaic Solar National Solar Thermal Test...

  17. Siemens PV Technology now Konarka | Open Energy Information

    Open Energy Info (EERE)

    Siemens PV Technology (now Konarka) Place: Germany Product: Formerly the organic photovoltaic research operations of Siemens, which became part of Konarka Technologies on...

  18. NREL Mesa Top PV System | Open Energy Information

    Open Energy Info (EERE)

    PV System Facility National Renewable Energy Laboratory Sector Solar Facility Type Photovoltaic Owner SunEdison Solar Developer SunEdison Solar Energy Purchaser National Renewable...

  19. Overcoming Structural Engineering Barriers to PV Permits and...

    Office of Scientific and Technical Information (OSTI)

    Title: Overcoming Structural Engineering Barriers to PV Permits and Installations. Abstract not provided. Authors: Dwyer, Stephen F. ; Harper, Alan Publication Date: 2010-02-01 ...

  20. Stichting Triodos PV Partners defunct | Open Energy Information

    Open Energy Info (EERE)

    22209 Product: Stichting Triodos PV Partners, a JV Triodos Bank Group, Environmental Enterprises Assistance Fund, & Global Transition Consulting, was wound up and the management of...

  1. NREL: Performance and Reliability R&D - PV Module Reliability...

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

    Performance Reliability R&D Photovoltaics Research Performance Reliability R and D Printable Version PV Module Reliability Workshop NREL hosts an annual Photovoltaic Module...

  2. Improving Data Transparency for the Distributed PV Interconnection...

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

    June 3, 2015 "Improving Data Transparency for the Distributed PV Interconnection Process: ... 2 Purpose of Today's Meeting * Learn how data reporting requirements for interconnection ...

  3. Summary of the 3rd International PV Module Quality Assurance...

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

    in Thermoelectric Power Generation Technologies in Japan Potential Induced Degradation (PID) Tests for Commercially Available PV Modules Overview of Thermoelectric Power ...

  4. PvXchange GmbH | Open Energy Information

    Open Energy Info (EERE)

    Berlin, Germany Zip: 10963 Sector: Services Product: A German platform for PV module spot trades. Also provides data on spot prices and offers consulting services. Coordinates:...

  5. Solar America Initiative (SAI) PV Technology Incubator Program: Preprint

    SciTech Connect (OSTI)

    Keyes, B.; Symko-Davies, M.; Mitchell, R.; Ullal H.; von Roedern, B.; Greene, L.; Stephens, S.

    2008-05-01

    The SAI PV Technology Incubator Program is designed to accelerate technologies/prodesses that have successfully demonstrated a proof-of-concept/process in a laboratory.

  6. Development of a Dispatchable PV Peak Shainv System. PV: Bonus Program - Phase 1 Report. Volume 1

    SciTech Connect (OSTI)

    1995-10-01

    This report summarizes the work performed by Delmarva Power and Light and its subcontractors in Phase 1 of the US Department of Energy's PV:BONUS Program. The purpose of the program is to develop products and systems for buildings which utilize photovoltaic (N) technology. Beginning with a cooperative research effort with the University of Delaware's Center for Energy and Environmental Policy Research Delmarva Power developed and demonstrated the concept of Dispatchable PV Peak Shaving. This concept and the system which resulted horn the development work are unique from other grid-connected PV systems because it combines a PV, battery energy storage, power conversion and control technologies into an integrated package. Phase 1 began in July 1993 with the installation of a test and demonstration system at Delmarva's Northern Division General Office building near Newark, Delaware. Following initial testing throughout the summer and fall of 1993, significant modifications were made under an amendment to the DOE contract. Work on Phase 1 concluded in the early spring of 1995. Significant progress towards the goal of commercializing the system was made during Phase 1, and is summarized. Based on progress in Phase 1, a proposal to continue the work in Phase 2 was submitted to the US DOE in May 1995. A contract amendment and providing funds for the Phase 2 work is expected in July 1995.

  7. Tri-Lateral Noor al Salaam High Concentration Solar Central Receiver Program

    SciTech Connect (OSTI)

    Blackmon, James B

    2008-03-31

    This report documents the efforts conducted primarily under the Noor al Salaam (“Light of Peace”) program under DOE GRANT NUMBER DE-FC36-02GO12030, together with relevant technical results from a closely related technology development effort, the U.S./Israel Science and Technology Foundation (USISTF) High Concentration Solar Central Receiver program. These efforts involved preliminary design, development, and test of selected prototype power production subsystems and documentation of an initial version of the system definition for a high concentration solar hybrid/gas electrical power plant to be built in Zaafarana, Egypt as a first step in planned commercialization. A major part of the planned work was halted in 2007 with an amendment in October 2007 requiring that we complete the technical effort by December 31, 2007 and provide a final report to DOE within the following 90 days. This document summarizes the work conducted. The USISTF program was a 50/50 cost-shared program supported by the Department of Commerce through the U.S./Israel Science and Technology Commission (USISTC). The USISTC was cooperatively developed by President Clinton and the late Prime Minister Rabin of Israel "to encourage technological collaboration" and "support peace in the Middle East through economic development". The program was conducted as a follow-on effort to Israel's Magnet/CONSOLAR Program, which was an advanced development effort to design, fabricate, and test a solar central receiver and secondary optics for a "beam down" central receiver concept. The status of these hardware development programs is reviewed, since they form the basis for the Noor al Salaam program. Descriptions are provided of the integrated system and the major subsystems, including the heliostat, the high temperature air receiver, the power conversion unit, tower and tower reflector, compound parabolic concentrator, and the master control system. One objective of the USISTF program was to conduct marketing research, identify opportunities for use of this technology, and to the extent possible, secure an agreement leading to a pre-commercialization demonstration or prototype plant. This was accomplished with the agreement to conduct the Noor al Salaam program as a tri-lateral project between Egypt, Israel, and the U.S. The tri-lateral project was led by the University of Alabama in Huntsville (UAH); this included the Egyptian New and Renewable Energy Authority and the Israeli USISTC participants. This project, known was Noor al Salaam, was funded by the U.S. Agency for International Development (USAID) through the Department of Energy (DOE). The Egyptian activity was under the auspices of the Egyptian Ministry of Energy and Electricity, New and Renewable Energy Authority (NREA) as part of Egypt's plans for renewable energy development. The objective of the Noor al Salaam project was to develop the conditions necessary to obtain funding and construct and operate an approximately 10 to 20 Megawatt hybrid solar/natural gas demonstration power plant in Zaafarana, Egypt that could serve both as a test bed for advanced solar technology evaluations, and as a forerunner to commercial plant designs. This plant, termed Noor Al Salaam, or “Light of Peace”, reached the initial phase of system definition before being curtailed, in part by changes in USAID objectives, coupled with various delays that were beyond the scope of the program to resolve. The background of the USISTF technology development and pre-commercialization effort is provided in this report, together with documentation of the technology developments conducted under the Noor al Salaam program. It should be noted that only a relatively small part of the Noor al Salaam funding was expended over the approximately five years for which UAH was prime contractor before the program was ordered closed (Reference 1) so that the remaining funds could be returned to USAID.

  8. Net Metering and Market Feedback Loops: Exploring the Impact of Retail Rate Design on Distributed PV Deployment

    SciTech Connect (OSTI)

    Darghouth, Naïm R.; Wiser, Ryan; Barbose, Galen; Mills, Andrew

    2015-01-13

    The substantial increase in deployment of customer-sited solar photovoltaics (PV) in the United States has been driven by a combination of steeply declining costs, financing innovations, and supportive policies. Among those supportive policies is net metering, which in most states effectively allows customers to receive compensation for distributed PV generation at the full retail electricity price. The current design of retail electricity rates and the presence of net metering have elicited concerns that the possible under-recovery of fixed utility costs from PV system owners may lead to a feedback loop of increasing retail prices that accelerate PV adoption and further rate increases. However, a separate and opposing feedback loop could offset this effect: increased PV deployment may lead to a shift in the timing of peak-period electricity prices that could reduce the bill savings received under net metering where time-varying retail electricity rates are used, thereby dampening further PV adoption. In this paper, we examine the impacts of these two competing feedback dynamics on U.S. distributed PV deployment through 2050 for both residential and commercial customers, across states. Our results indicate that, at the aggregate national level, the two feedback effects nearly offset one another and therefore produce a modest net effect, although their magnitude and direction vary by customer segment and by state. We also model aggregate PV deployment trends under various rate designs and net-metering rules, accounting for feedback dynamics. Our results demonstrate that future adoption of distributed PV is highly sensitive to retail rate structures. Whereas flat, time-invariant rates with net metering lead to higher aggregate national deployment levels than the current mix of rate structures (+5% in 2050), rate structures with higher monthly fixed customer charges or PV compensation at levels lower than the full retail rate can dramatically erode aggregate customer adoption of PV (from -14% to -61%, depending on the design). Moving towards time-varying rates, on the other hand, may accelerate near- and medium-term deployment (through 2030), but is found to slow adoption in the longer term (-22% in 2050).

  9. Grid-tied PV battery systems.

    SciTech Connect (OSTI)

    Barrett, Keith Phillip; Gonzalez, Sigifredo; Hund, Thomas D.

    2010-09-01

    Grid tied PV energy smoothing was implemented by using a valve regulated lead-acid (VRLA) battery as a temporary energy storage device to both charge and discharge as required to smooth the inverter energy output from the PV array. Inverter output was controlled by the average solar irradiance over the previous 1h time interval. On a clear day the solar irradiance power curve is offset by about 1h, while on a variable cloudy day the inverter output power curve will be smoothed based on the average solar irradiance. Test results demonstrate that this smoothing algorithm works very well. Battery state of charge was more difficult to manage because of the variable system inefficiencies. Testing continued for 30-days and established consistent operational performance for extended periods of time under a wide variety of resource conditions. Both battery technologies from Exide (Absolyte) and East Penn (ALABC Advanced) proved to cycle well at a Partial state of charge over the time interval tested.

  10. Highly concentrated nebular noble gases in porous nanocarbon separates from the Saratov (L4) meteorite

    SciTech Connect (OSTI)

    Amari, Sachiko; Matsuda, Jun-ichi; Stroud, Rhonda M.; Chisholm, Matthew F.

    2013-11-20

    The majority of heavy noble gases (Ar, Kr, and Xe) in primitive meteorites are stored in a poorly understood phase called Q. Although Q is thought to be carbonaceous, the full identity of the phase has remained elusive for almost four decades. In order to better characterize phase Q and, in turn, the early solar nebula, we separated carbon-rich fractions from the Saratov (L4) meteorite. We chose this meteorite because Q is most resistant in thermal alteration among carbonaceous noble gas carriers in meteorites and we hoped that, in this highly metamorphosed meteorite, Q would be present but not diamond: these two phases are very difficult to separate from each other. One of the fractions, AJ, has the highest {sup 132}Xe concentration of 2.1 10{sup 6} cm{sup 3} STP g{sup 1}, exceeding any Q-rich fractions that have yet been analyzed. Transmission electron microscopy studies of the fraction AJ and a less Q-rich fraction AI indicate that they both are primarily porous carbon that consists of domains with short-range graphene orders, with variable packing in three dimensions, but no long-range graphitic order. The relative abundance of Xe and C atoms (6:10{sup 9}) in the separates indicates that individual noble gas atoms are associated with only a minor component of the porous carbon, possibly one or more specific arrangements of the nanoparticulate graphene.

  11. Copper Antimony Chalcogenide Thin Film PV Device Development

    SciTech Connect (OSTI)

    Welch, Adam W.; Baranowski, Lauryn L.; de Souza Lucas, Francisco Willian; Toberer, Eric S.; Wolden, Colin A.; Zakutayev, Andriy

    2015-06-14

    Emerging ternary chalcogenide thin film solar cell technologies, such as CuSbS2 and CuSbSe2, have recently attracted attention as simpler alternatives to quaternary Cu2ZnSnS4 (CZTS). Despite suitable photovoltaic properties, the initial energy conversion efficiency of CuSbS2 is rather low (0.3%). Here, we report on our progress towards improving the efficiency of CuSbS2 solar cells using a high throughput approach. The combinatorial methodology quickly results in baseline solar cell prototypes with 0.6% efficiency, and then modification of the back contact architecture leads to 1% PV devices. We then translate the optimal CuSbS2 synthesis parameters to CuSbSe2 devices, which show 3% efficiencies.

  12. Sacramento Municipal Utility District PV and Smart Grid Pilot at Anatolia

    SciTech Connect (OSTI)

    Rawson, Mark; Sanchez, Eddie Paul

    2013-12-30

    Under DE-FOA-0000085 High Penetration Solar Deployment, the U. S. Department of Energy funded agreements with SMUD and Navigant Consulting, SunPower, GridPoint, the National Renewable Energy Laboratory, and the California Energy Commission for this pilot demonstration project. Funding was $5,962,409.00. Cost share of $500,000 was also provided by the California Energy Commission. The project has strategic implications for SMUD, other utilities and the PV and energy-storage industries in business and resource planning, technology deployment and asset management. These implications include: -At this point, no dominant business models have emerged and the industry is open for new ideas. -Demonstrated two business models for using distributed PV and energy storage, and brainstormed several dozen more, each with different pros and cons for SMUD, its customers and the industry. -Energy storage can be used to manage high penetrations of PV and mitigate potential issues such as reverse power flow, voltage control violations, power quality issues, increased wear and tear on utility equipment, and system wide power supply issues. - Smart meters are another tool utilities can use to manage high penetrations of PV. The necessary equipment and protocols exist, and the next step is to determine how to integrate the functionality with utility programs and what level of utility control is required. - Time-of-use rates for the residential customers who hosted energy storage systems did not cause a significant change in energy usage patterns. However, the rates we used were not optimized for PV and energy storage. Opportunities exist for utilities to develop new structures.

  13. Sensitivities of I-V Parameters in C-Si PV Modules of Hygrothermal...

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

    Sensitivities of I-V Parameters in C-Si PV Modules of Hygrothermal Stress Sensitivities of I-V Parameters in C-Si PV Modules of Hygrothermal Stress Presented at the PV Module ...

  14. U.S. Department of Energy PV Roadmaps | Open Energy Information

    Open Energy Info (EERE)

    PV Roadmaps Jump to: navigation, search Logo: U.S. Department of Energy PV Roadmaps Name U.S. Department of Energy PV Roadmaps AgencyCompany Organization United States Department...

  15. Preliminary Analysis of Modules Deployed at PV-USA for 18-24...

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

    Preliminary Analysis of Modules Deployed at PV-USA for 18-24 Years Preliminary Analysis of Modules Deployed at PV-USA for 18-24 Years Presented at the PV Module Reliability ...

  16. PV Validation and Bankability Workshop | Department of Energy

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

    document summarizes the information given on Aug. 29, 2011, on the survey results of the PV Validation and Bankability Workshop on Aug. 31, 2011. PDF icon pv_vb_surveyresults.pdf More Documents & Publications Federal Energy Management Program Report Template Focus Group Meeting (Activities Status) RFI: DOE Materials Strategy

  17. Impact of residential PV adoption on Retail Electricity Rates

    SciTech Connect (OSTI)

    Cai, DWH; Adlakha, S; Low, SH; De Martini, P; Chandy, KM

    2013-11-01

    The price of electricity supplied from home rooftop photo voltaic (PV) solar cells has fallen below the retail price of grid electricity in some areas. A number of residential households have an economic incentive to install rooftop PV systems and reduce their purchases of electricity from the grid. A significant portion of the costs incurred by utility companies are fixed costs which must be recovered even as consumption falls. Electricity rates must increase in order for utility companies to recover fixed costs from shrinking sales bases. Increasing rates will, in turn, result in even more economic incentives for customers to adopt rooftop PV. In this paper, we model this feedback between PV adoption and electricity rates and study its impact on future PV penetration and net-metering costs. We find that the most important parameter that determines whether this feedback has an effect is the fraction of customers who adopt PV in any year based solely on the money saved by doing so in that year, independent of the uncertainties of future years. These uncertainties include possible changes in rate structures such as the introduction of connection charges, the possibility of PV prices dropping significantly in the future, possible changes in tax incentives, and confidence in the reliability and maintainability of PV. (C) 2013 Elsevier Ltd. All rights reserved.

  18. Statistical and Domain Analytics Applied to PV Module Lifetime and

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

    Degradation Science | Department of Energy ps2_casewestern_bruckman.pdf More Documents & Publications Literature Review of the Effects of UV Exposure on PV Modules Failure Rates from Certification Testing to UL and IEC Standards for Flat Plate PV Modules Vehicle Technologies Office: 2015 Electric Drive Technologies Annual R&D Progress Report

  19. Performance and Reliability of Multijunction III-V Modules for Concentrator Dish and Central Receiver Applications

    SciTech Connect (OSTI)

    Verlinden, P. J.; Lewandowski, A.; Bingham, C.; Kinsey, G. S.; Sherif, R. A.; Laisch, J. B.

    2006-01-01

    Over the last 15 years, Solar Systems have developed a dense array receiver PV technology for 500X concentrator reflective dish applications. This concentrator PV technology has been successfully deployed at six different locations in Australia, counting for more than 1 MWp of installed peak power. A new Multijunction III-V receiver to replace the current silicon Point-Contact solar cells has recently been developed. The new receiver technology is based on high-efficiency (>32%) Concentrator Ultra Triple Junction (CUTJ) solar cells from Spectrolab, resulting in system power and energy performance improvement of more than 50% compared to the silicon cells. The 0.235 m{sup 2} concentrator PV receiver, designed for continuous 500X operation, is composed of 64 dense array modules, and made of series and parallel-connected solar cells, totaling approximately 1,500 cells. The individual dense array modules have been tested under high intensity pulsed light, as well as with concentrated sunlight at the Solar Systems research facility and at the National Renewable Energy Laboratory's High Flux Solar Furnace. The efficiency of the dense array modules ranges from 30% to 36% at 500X (50 W/cm{sup 2}, AM1.5D low AOD, 21C). The temperature coefficients for power, voltage and current, as well as the influence of Air Mass on the cell responsivity, were measured. The reliability of the dense array multijunction III-V modules has been studied with accelerated aging tests, such as thermal cycling, damp heat and high-temperature soak, and with real-life high-intensity exposure. The first 33 kWp multijunction III-V receiver was recently installed in a Solar Systems dish and tested in real-life 500X concentrated sunlight conditions. Receiver efficiencies of 30.3% and 29.0% were measured at Standard Operating Conditions and Normal Operating Conditions respectively.

  20. Project Profile: High-Concentration, Low-Cost Parabolic Trough System for Baseload CSP

    Broader source: Energy.gov [DOE]

    SkyFuel, under the Baseload CSP FOA, is developing an advanced, low-cost CSP collector using higher-concentration, higher-temperature, parabolic trough technology to substantially reduce the cost of baseload utility-scale solar power generation.

  1. Project Profile: High-Temperature Thermochemical Storage with Redox-Stable Perovskites for Concentrating Solar Power

    Broader source: Energy.gov [DOE]

    The Department of Energy's SunShot Initiative made an award to Colorado School of Mines (CSM) through the Concentrating Solar Power: Efficiently Leveraging Equilibrium Mechanisms for Engineering New Thermochemical Storage (CSP: ELEMENTS) funding program.

  2. Potential Role of Concentrating Solar Power in Enabling High Renewables Scenarios in the United States

    SciTech Connect (OSTI)

    Denholm, P.; Hand, M.; Mai, T.; Margolis, R.; Brinkman, G.; Drury, E.; Mowers, M.; Turchi, C.

    2012-10-01

    This work describes the analysis of concentrating solar power (CSP) in two studies -- The SunShot Vision Study and the Renewable Electricity Futures Study -- and the potential role of CSP in a future energy mix.

  3. Linkage to Previous International PV Module QA Task Force Workshops; Proposal for Rating System (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Wohlgemuth, J.; Sample, T.; Yamamichi, M.; Kondo, M.

    2013-05-01

    This presentation gives the historical background of the creation of the International PV QA Task Force as an introduction to the PV Module Reliability Workshop.

  4. The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects...

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

    The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects Data courtesy of National Renewable Energy ...

  5. The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects...

    Office of Environmental Management (EM)

    The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects Data courtesy of National Renewable Energy...

  6. Utility Scale PV Perspective on SunShot Progress and Opportunities...

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

    Utility Scale PV Perspective on SunShot Progress and Opportunities Utility Scale PV Perspective on SunShot Progress and Opportunities These slides correspond to a presentation ...

  7. Nox control for high nitric oxide concentration flows through combustion-driven reduction

    DOE Patents [OSTI]

    Yeh, James T.; Ekmann, James M.; Pennline, Henry W.; Drummond, Charles J.

    1989-01-01

    An improved method for removing nitrogen oxides from concentrated waste gas streams, in which nitrogen oxides are ignited with a carbonaceous material in the presence of substoichiometric quantities of a primary oxidant, such as air. Additionally, reductants may be ignited along with the nitrogen oxides, carbonaceous material and primary oxidant to achieve greater reduction of nitrogen oxides. A scrubber and regeneration system may also be included to generate a concentrated stream of nitrogen oxides from flue gases for reduction using this method.

  8. Analytical Improvements in PV Degradation Rate Determination

    SciTech Connect (OSTI)

    Jordan, D. C.; Kurtz, S. R.

    2011-02-01

    As photovoltaic (PV) penetration of the power grid increases, it becomes vital to know how decreased power output may affect cost over time. In order to predict power delivery, the decline or degradation rates must be determined accurately. For non-spectrally corrected data several complete seasonal cycles (typically 3-5 years) are required to obtain reasonably accurate degradation rates. In a rapidly evolving industry such a time span is often unacceptable and the need exists to determine degradation rates accurately in a shorter period of time. Occurrence of outliers and data shifts are two examples of analytical problems leading to greater uncertainty and therefore to longer observation times. In this paper we compare three methodologies of data analysis for robustness in the presence of outliers, data shifts and shorter measurement time periods.

  9. Innovations in Wind and Solar PV Financing

    SciTech Connect (OSTI)

    Cory, K.; Coughlin, J.; Jenkin, T.; Pater, J.; Swezey, B.

    2008-02-01

    There is growing national interest in renewable energy development based on the economic, environmental, and security benefits that these resources provide. Historically, greater development of our domestic renewable energy resources has faced a number of hurdles, primarily related to cost, regulation, and financing. With the recent sustained increase in the costs and associated volatility of fossil fuels, the economics of renewable energy technologies have become increasingly attractive to investors, both large and small. As a result, new entrants are investing in renewable energy and new business models are emerging. This study surveys some of the current issues related to wind and solar photovoltaic (PV) energy project financing in the electric power industry, and identifies both barriers to and opportunities for increased investment.

  10. Optimal Solar PV Arrays Integration for Distributed Generation

    SciTech Connect (OSTI)

    Omitaomu, Olufemi A; Li, Xueping

    2012-01-01

    Solar photovoltaic (PV) systems hold great potential for distributed energy generation by installing PV panels on rooftops of residential and commercial buildings. Yet challenges arise along with the variability and non-dispatchability of the PV systems that affect the stability of the grid and the economics of the PV system. This paper investigates the integration of PV arrays for distributed generation applications by identifying a combination of buildings that will maximize solar energy output and minimize system variability. Particularly, we propose mean-variance optimization models to choose suitable rooftops for PV integration based on Markowitz mean-variance portfolio selection model. We further introduce quantity and cardinality constraints to result in a mixed integer quadratic programming problem. Case studies based on real data are presented. An efficient frontier is obtained for sample data that allows decision makers to choose a desired solar energy generation level with a comfortable variability tolerance level. Sensitivity analysis is conducted to show the tradeoffs between solar PV energy generation potential and variability.

  11. Kauai Island Utility Co-op (KIUC) PV integration study.

    SciTech Connect (OSTI)

    Ellis, Abraham; Mousseau, Tom

    2011-08-01

    This report investigates the effects that increased distributed photovoltaic (PV) generation would have on the Kauai Island Utility Co-op (KIUC) system operating requirements. The study focused on determining reserve requirements needed to mitigate the impact of PV variability on system frequency, and the impact on operating costs. Scenarios of 5-MW, 10-MW, and 15-MW nameplate capacity of PV generation plants distributed across the Kauai Island were considered in this study. The analysis required synthesis of the PV solar resource data and modeling of the KIUC system inertia. Based on the results, some findings and conclusions could be drawn, including that the selection of units identified as marginal resources that are used for load following will change; PV penetration will displace energy generated by existing conventional units, thus reducing overall fuel consumption; PV penetration at any deployment level is not likely to reduce system peak load; and increasing PV penetration has little effect on load-following reserves. The study was performed by EnerNex under contract from Sandia National Laboratories with cooperation from KIUC.

  12. Preservation of high glycolytic phenotype by establishing new acute lymphoblastic leukemia cell lines at physiologic oxygen concentration

    SciTech Connect (OSTI)

    Sheard, Michael A.; Ghent, Matthew V.; Cabral, Daniel J.; Lee, Joanne C.; Khankaldyyan, Vazgen; Ji, Lingyun; Wu, Samuel Q.; Kang, Min H.; and others

    2015-05-15

    Cancer cells typically exhibit increased glycolysis and decreased mitochondrial oxidative phosphorylation, and they continue to exhibit some elevation in glycolysis even under aerobic conditions. However, it is unclear whether cancer cell lines employ a high level of glycolysis comparable to that of the original cancers from which they were derived, even if their culture conditions are changed to physiologically relevant oxygen concentrations. From three childhood acute lymphoblastic leukemia (ALL) patients we established three new pairs of cell lines in both atmospheric (20%) and physiologic (bone marrow level, 5%) oxygen concentrations. Cell lines established in 20% oxygen exhibited lower proliferation, survival, expression of glycolysis genes, glucose consumption, and lactate production. Interestingly, the effects of oxygen concentration used during cell line initiation were only partially reversible when established cell cultures were switched from one oxygen concentration to another for eight weeks. These observations indicate that ALL cell lines established at atmospheric oxygen concentration can exhibit relatively low levels of glycolysis and these levels are semi-permanent, suggesting that physiologic oxygen concentrations may be needed from the time of cell line initiation to preserve the high level of glycolysis commonly exhibited by leukemias in vivo. - Highlights: • Establishing new ALL cell lines in 5% oxygen resulted in higher glycolytic expression and function. • Establishing new ALL cell lines in 5% oxygen resulted in higher proliferation and lower cell death. • The divergent metabolic phenotypes selected in 5% and 20% oxygen are semi-permanent.

  13. PV Validation and Bankability Workshop: San Jose, California

    SciTech Connect (OSTI)

    Granata, J.; Howard, J.

    2011-12-01

    This report is a collaboration between Sandia National Laboratories, the National Renewable Energy Laboratory, and the Florida Solar Energy Center (FSEC). The report provides feedback from the U.S. Department of Energy's (DOE) Solar Program PV Validation and Bankability Workshop in San Jose, California on August 31, 2011. It focuses on the current state of PV in the United States, private funding to fund U.S. PV industry growth, roles and functions of the regional test center program, and ways to improve the current validation and bankability practices.

  14. ENERGY-10 PV: Photovoltaics, A New Capability (Preprint)

    SciTech Connect (OSTI)

    Balcomb, J.D.; Hayter, S.J.; Weaver, N.L.

    2001-02-16

    This is one of two companion papers that describe the ENERGY-10 PV design-tool computer simulation program. The other paper is titled ''Hourly Simulation of Grid-Connected PV Systems Using Realistic Building Loads.'' While this paper focuses on the implementation method, the companion paper focuses on the PV aspects of the program. The case study in this paper is a residential building application, whereas the case study in the companion paper is a commercial application with an entirely different building load characteristic. Together, they provide a balanced view.

  15. High Performance Photovoltaic Project: Identifying Critical Pathways, Phase 1 Review Meeting, 15-16 July 2002, Denver, Colorado (CD-ROM)

    SciTech Connect (OSTI)

    Symko-Davies, M.; Robinson, P.

    2002-12-01

    The High-Performance PV Project, Phase 1 objectives are: Accelerate the development of PV in the 21st century to meet economic and environmental needs, and double sunlight-to-electricity conversion efficiency of cost-competitive PV technologies. Cost-competitive technologies: high-flux concentrators-high-efficiency multijunction cells, single-axis concentrators using thin-film cells; and low-cost multijunction thin films for large-area, monolithically interconnected flat-plate modules. Subcontracts are under way toward project targets; polycrystalline in-house efforts focus on the top cell of a tandem structure; and the III-V multijunction in-house effort focuses on the GaInAsN junction.

  16. Manufacturing of ultra-high efficiency thin-film concentrator cells

    SciTech Connect (OSTI)

    Gale, R. )

    1992-02-01

    This report describes a research project to study developments required to expedite commercializing the GaAs solar cell concentrator technology. We baseline the GaAs concentrator cell and 1000X module design into pilot operation at Kopin Corporation. To attain these improvements, we will use Kopin's existing pilot line to produce cleavage of lateral epitaxial film for transfer (CLEFT) GaAs solar cells; these cells already exhibit efficiencies of about 24% at air mass 1.5. We will modify the CLEFT cell to form concentrators that perform well at 500--1000 suns. We will derive the know-how for this modification from an integration of Kopin and VS Corporation technologies. The pilot line will be broadened to include cell receiver and module assembly, using VS Corporation technology obtained from Varian as a baseline. A second-generation design will be formulated to address improvements in the module, and these will be incorporated into the pilot line along with the CLEFT concentrator cell. In parallel, we integrate Kopin's CLEFT GaAs cell technology with the advanced AlGaAs and InGaAs material technology obtained by VS Corporation from Varian to develop a near-term, two-junction mechanical stack with an efficiency of 35%. The receiver thus developed will be compatible with a three-junction approach that has been proposed elsewhere by Kopin. Using a three-junction stack can yield an efficiency of over 40%, and when such cells become available, the pilot line process will have been designed to use them. 11 refs.

  17. PV Technologies India Ltd Moser Baer Solar Plc | Open Energy...

    Open Energy Info (EERE)

    India Ltd Moser Baer Solar Plc Jump to: navigation, search Name: PV Technologies India Ltd (Moser Baer Solar Plc) Place: New Delhi, Delhi (NCT), India Zip: 110020 Product: One of...

  18. Plug and Play Solar PV for American Homes

    Broader source: Energy.gov [DOE]

    The Fraunhofer Center for Sustainable Energy Systems (CSE) will develop a new plug-and-play PV system that self-checks for proper installation and safety and communicates with the local utility and...

  19. City of Shasta Lake Electric Utility- PV Rebate Program

    Broader source: Energy.gov [DOE]

    City of Shasta Lake Electric Utility is providing rebates to their customers for the purchase of photovoltaic (PV) systems. The rebate levels will decrease annually over the life of the program. ...

  20. Accuracy of Outdoor PV Module Temperature Monitoring Application...

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

    Presented at the PV Module Reliability Workshop, February 26 - 27 2013, Golden, Colorado PDF icon pvmrw13ps1univljubjanovec.pdf More Documents & Publications QA TG5 UV, ...

  1. Yangrui PV Technology Fujian Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    (Fujian) Co Ltd Place: Fujian Province, China Product: Involved in the production of a-Si thin-film cells using a turnkey technology supplier. References: Yangrui PV Technology...

  2. Giant Leap Forward Toward Quality Assurance of PV Modules (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Wohlgemuth, J.; Sample, T.; Yamamichi, M.

    2012-03-01

    The presentation describes the composition of and motivation for the International PV QA Task Force, then describes the presentations and discussion that occurred at the workshop on Feb. 29th, 2012.

  3. Interconnecting PV on New York City's Secondary Network Distribution System

    SciTech Connect (OSTI)

    Anderson, K.; Coddington, M.; Burman, K.; Hayter, S.; Kroposki, B.; Watson, A.

    2009-12-01

    This study describes technical assistance provided by NREL to help New York City and Con Edison improve the interconnection of distributed PV systems on a secondary network distribution system.

  4. Instrumentation for Evaluating PV System Performance Losses from Snow

    SciTech Connect (OSTI)

    Marion, B.; Rodriguez, J.; Pruett, J.

    2009-01-01

    When designing a photovoltaic (PV) system for northern climates, the prospective installation should be evaluated with respect to the potentially detrimental effects of snow preventing solar radiation from reaching the PV cells. The extent to which snow impacts performance is difficult to determine because snow events also increase the uncertainty of the solar radiation measurement, and the presence of snow needs to be distinguished from other events that can affect performance. This paper describes two instruments useful for evaluating PV system performance losses from the presence of snow: (1) a pyranometer with a heater to prevent buildup of ice and snow, and (2) a digital camera for remote retrieval of images to determine the presence of snow on the PV array.

  5. Tucson's Solar Experience: Developing PV with RFPs and PPAs

    Broader source: Energy.gov [DOE]

    This presentation was given January 15, 2013, by Bruce Plenk, Solar Coordinator for the City of Tucson, Arizona, as part of the CommRE Developing PV Projects With RFPs and PPAs webinar.

  6. DOE-LPO-MiniReport_PV_v10

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

    in launching the utility-scale photovoltaic (PV) solar industry in the United States. ... February 2015 POWERING NEW MARKETS: UTILITY-SCALE PHOTOVOLTAIC SOLAR energy.govlpo 1 In ...

  7. AEP Texas Central Company - SMART Source Solar PV Rebate Program...

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

    from the date of installation. PV modules must be new and certified to UL 1703, and inverters must be new and certified to UL 1741. All installations must be performed service...

  8. Stion Commissions PV System at Sandia Regional Test Center

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

    ... Thin-film solar module manufacturer Stion has commissioned a 12 kW fixed latitude ground-mounted photovoltaic (PV) system at the DOE's New Mexico Regional Test Center (RTC), ...

  9. Full Steam Ahead for PV in US Homes?

    SciTech Connect (OSTI)

    Bolinger, Mark A; Barbose, Galen; Wiser, Ryan

    2009-01-15

    In October 2008, the United States Congress extended both the residential and commercial solar investment tax credits (ITCs) for an unprecedented eight years, lifted the $2,000 cap on the residential credit, removed the prohibition on utility use of the commercial credit, and eliminated restrictions on the use of both credits in conjunction with the Alternative Minimum Tax. These significant changes, which apply to systems placed in service on or after January 1, 2009, will increase the value of the solar credits for residential system owners in particular, and are likely--in conjunction with state, local, and utility rebate programs targeting solar--to spur significant growth in residential, commercial, and utility-scale photovoltaic (PV) installations in the years ahead. This article focuses specifically on the residential credit, describing three areas in which removal of the $2,000 cap on the residential ITC will have significant implications for PV rebate program administrators, PV system owners, and the PV industry.

  10. Device Tosses Out Unusable PV Wafers - News Feature | NREL

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

    The PV industry generated 82 billion in global revenues in 2010, producing 20.5 gigawatts of electricity from sunlight. Processing solar cells costs about 15 cents for each watt ...

  11. Impact of Soiling and Pollution on PV Generation Performance

    Broader source: Energy.gov [DOE]

    This 5-page technical letter addresses air pollution effects on PV performance by quantifying, based on a literature search, the average annual loss due to soiling, the impact of cleaning, and a recommended cleaning schedule.

  12. Taunton Municipal Lighting Plant- Residential PV Rebate Program

    Broader source: Energy.gov [DOE]

    Customers of Taunton Municipal Lighting Plant (TMLP) may be eligible for a $1.50/watt rebate on solar photovoltaic (PV) installations, up to a maximum rebate of $4,500. The system must be installed...

  13. PROJECT PROFILE: Reducing PV Performance Uncertainty by Accurately...

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

    The goal is to create an integrated web service that provides a 20-year PV resource ... and add in new components such as spectral decomposition used in atmospheric science. ...

  14. Enhanced Modeling and Monitoring Tools for Distributed PV Interconnection

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

    Enhanced Modeling and Monitoring Tools for Distributed PV Interconnection Page 1 of 27 Kristen Ardani, Rick Thompson, Mark Rawson, David Pinney Page 1 of 27 [Speaker: Kristen Ardani] Cover Slide: Thank you everyone for joining us today for the DG Interconnection Collaborative's informational webinar. The focus of today's presentation will be on enhanced modeling and monitoring tools for distributed PV interconnection. We have a guest speaker from Green Tech Media (GTM) today, Rick Thompson. So

  15. DOE-LPO-MiniReport_PV_v10

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

    Department of Energy's Loan Programs O ce (LPO) was instrumental in launching the utility-scale photovoltaic (PV) solar industry in the United States. In 2009, there was not a single PV solar facility larger than 100 megawatts (MW) operating in the United States. Despite growing demand for this clean, renewable energy source, developers faced challenges securing the financing necessary to build these large projects. LPO stepped in to address this market barrier by providing more than $4.6

  16. Microgrid-Ready Solar PV; NREL (National Renewable Energy Laboratory)

    SciTech Connect (OSTI)

    2015-07-01

    Designing new solar projects to be 'microgrid-ready' enables the U.S. DoD, other federal agencies, and the private sector to plan future microgrid initiatives to utilize solar PV as a generating resource. This fact sheet provides background information with suggested language for several up-front considerations that can be added to a solar project procurement or request for proposal (RFP) that will help ensure that PV systems are built for future microgrid connection.

  17. Distributed PV Interconnection Screening Procedures and Online Tools

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

    Distributed PV Interconnection Screening Procedures and Online Tools" Joel Dickinson with Salt River Project Solar Initiatives Group August 27, 2014 2 Speakers Joel Dickinson Sr. Engineer Salt River Project Kristen Ardani Solar Analyst National Renewable Energy Laboratory (DGIC moderator) August 27th, 2014 Joel Dickinson, P.E. Sr. Engineer Solar Initiatives Distributed PV Interconnection Screening and Online Tools Salt River Project  Established in 1903 after Theodore Roosevelt signed

  18. Time-dependent first-principles approaches to PV materials

    SciTech Connect (OSTI)

    Miyamoto, Yoshiyuki

    2013-12-10

    Computational scheme for designing photovoltaic (PV) materials is presented. First-principles electron dynamics of photo-excitation and subsequent electron-hole splitting is performed based on the time-dependent density functional theory. Photo-induced enhancement of dipole moment was observed in a polar crystal and a donor-acceptor molecular pair. These experiences will pave a way to design PV material from first-principles simulations.

  19. ASTM PV INSTALLATON COMMISSIONING, OPERATIONS & MAINTENNCE (ICOMP) STANDARD PRACTICE

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

    ASTM PV INSTALLATON COMMISSIONING, OPERATIONS & MAINTENNCE (ICOMP) STANDARD PRACTICE MEETING ANNOUNCEMENT ASTM International subcommittee E44.09 Photovoltaic Electric Power Conversion will be holding a meeting for their WK43549 Practice for Installation Commissioning Operation and Maintenance Process task group on Thursday, May 8, 2014 at 8:00am until 1:00pm. This meeting will follow the Sandia/EPRI 2014 PV Systems Symposium. The scope of WK43549 is to work with others around the world to

  20. PV Derived Data for Predicting Performance; NREL (National Renewable Energy Laboratory)

    SciTech Connect (OSTI)

    Marion, Bill

    2015-09-14

    A method is described for providing solar irradiance data for modeling PV performance by using measured PV performance data and back-solving for the unknown direct normal irradiance (DNI) and diffuse horizontal irradiance (DHI), which can then be used to model the performance of PV systems of any size, PV array tilt, or PV array azimuth orientation. Ideally situated for using the performance data from PV modules with micro-inverters, the PV module operating current is used to determine the global tilted irradiance (GTI), and a separation model is then used to determine the DNI and DHI from the GTI.

  1. Continuing Developments in PV Risk Management: Strategies, Solutions, and Implications

    SciTech Connect (OSTI)

    Lowder, T.; Mendelsohn, M.; Speer, B.; Hill, R.

    2013-02-01

    As the PV industry matures, successful risk management practices will become more imperative to ensure investor confidence, control costs, and facilitate further growth. This report discusses several key aspects of risk management during the commercial- and utility-scale project life cycle, from identification of risks, to the process of mitigating and allocating those risks among project parties, to transferring those risks through insurance. The report also explores novel techniques in PV risk management, options to offload risks onto the capital markets, and innovative insurance policies (namely warranty policies) that address risks unique to the PV sector. One of the major justifications for robust risk management in the PV industry is the cost-reduction opportunities it affords. If the PV industry can demonstrate the capability to successfully manage its risks, thereby inspiring confidence in financiers, it may be able to obtain a lower cost of capital in future transactions. A lower cost of capital translates to a lower cost of energy, which will in turn enhance PV?s competitiveness at a time when it will have to rely less on subsidies to support its market penetration.

  2. Performance evaluation of stand alone hybrid PV-wind generator

    SciTech Connect (OSTI)

    Nasir, M. N. M.; Saharuddin, N. Z.; Sulaima, M. F.; Jali, Mohd Hafiz; Bukhari, W. M.; Bohari, Z. H.; Yahaya, M. S.

    2015-05-15

    This paper presents the performance evaluation of standalone hybrid system on Photovoltaic (PV)-Wind generator at Faculty of Electrical Engineering (FKE), UTeM. The hybrid PV-Wind in UTeM system is combining wind turbine system with the solar system and the energy capacity of this hybrid system can generate up to charge the battery and supply the LED street lighting load. The purpose of this project is to evaluate the performance of PV-Wind hybrid generator. Solar radiation meter has been used to measure the solar radiation and anemometer has been used to measure the wind speed. The effectiveness of the PV-Wind system is based on the various data that has been collected and compared between them. The result shows that hybrid system has greater reliability. Based on the solar result, the correlation coefficient shows strong relationship between the two variables of radiation and current. The reading output current followed by fluctuate of solar radiation. However, the correlation coefficient is shows moderate relationship between the two variables of wind speed and voltage. Hence, the wind turbine system in FKE show does not operate consistently to produce energy source for this hybrid system compare to PV system. When the wind system does not fully operate due to inconsistent energy source, the other system which is PV will operate and supply the load for equilibrate the extra load demand.

  3. Using Bayesian Inference Framework towards Identifying Gas Species and Concentration from High Temperature Resistive Sensor Array Data

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

    Liu, Yixin; Zhou, Kai; Lei, Yu

    2015-01-01

    High temperature gas sensors have been highly demanded for combustion process optimization and toxic emissions control, which usually suffer from poor selectivity. In order to solve this selectivity issue and identify unknown reducing gas species (CO, CH 4 , and CH 8 ) and concentrations, a high temperature resistive sensor array data set was built in this study based on 5 reported sensors. As each sensor showed specific responses towards different types of reducing gas with certain concentrations, based on which calibration curves were fitted, providing benchmark sensor array response database, then Bayesian inference framework was utilized to processmore » the sensor array data and build a sample selection program to simultaneously identify gas species and concentration, by formulating proper likelihood between input measured sensor array response pattern of an unknown gas and each sampled sensor array response pattern in benchmark database. This algorithm shows good robustness which can accurately identify gas species and predict gas concentration with a small error of less than 10% based on limited amount of experiment data. These features indicate that Bayesian probabilistic approach is a simple and efficient way to process sensor array data, which can significantly reduce the required computational overhead and training data.« less

  4. Lightweight PV Inverters: Dual Bi-Directional IGBTs Modules Enables Breakthrough PV Inverter Using Current Modulation Topology

    SciTech Connect (OSTI)

    2012-01-30

    Solar ADEPT Project: PV inverters convert DC power generated by modules into usable AC power. IPCs initial 30kW 94lb. PV inverter reduces the weight of comparable 30kW PV inverters by 90%reducing the cost of materials, manufacturing, shipping, and installation. With ARPA-E support, new bi-directional silicon power switches will be developed, commercialized, and utilized in IPCs next-generation PV inverter. With these components, IPC will produce 100kW inverters that weight less than 100lb., reducing the weight of conventional 3,000lb. 100kW inverters by more than 95%. The new power switches will cut IPCs $/W manufacturing cost in half, as well as further reduce indirect shipping and installation costs.

  5. All-AC, building integrated PV system for mass deployment of residential PV systems

    SciTech Connect (OSTI)

    Kevin Cammack; Joe Augenbraun; Dan Sun

    2011-05-17

    Project Objective: Solar Red is developing novel PV installation methods and system designs that lower costs dramatically and allow seamless integration into the structure of any sloped roof using existing construction tools and processes. The overall objective of this project is to address the greatest barriers to massive adoption of residential and small commercial rooftop solar scalability of installation and total cost of ownership - by moving Solar Reds snap-in/snap-out PV installation method from the pre-prototype design phase to the development and construction of a deployed prototype system. Financial Summary: ? Funded through ARRA, DOE and Match Funding ? Original Project Budget: $229,310 o DOE/ARRA Funding: $150,000 o Match Funding: $79,310 ? Actual Cost: $216,598 o DOE/ARRA Funding: $150,000 o Match Funding: $120,087 Project Summary: Develop snap-in/snap-out mounting system for low-cost, thin-film solar panels Lower installation cost Lower sales costs Lower training/expertise barriers

  6. Recovery Act: A Low Cost Spray Deposited Solar PV Anti-Reflection Coating Final Technical Report

    SciTech Connect (OSTI)

    Harvey, Michael D.

    2010-08-30

    PV module glass is typically low iron glass which exhibits extremely low absorption of light at solar wavelengths. However, reflection losses from typical high quality solar glass are about 4.5% of the input solar energy. By applying an antireflection coating to the cover glass of their modules, a PV module maker will gain at least a 3% increase in the light passing through the glass and being converted to electricity. Thus achieving an increase of >3% in electricity output from the modules. This Project focussed on developing a process that deposits a layer of porous silica (SiO2) on glass or plastic components, and testing the necessary subcomponents and subsystems required to demonstrate the commercial technology. This porous layer acts as a broadband single layer AR coating for glass and plastics, with the added benefit of being a hydrophilic surface for low surface soiling.

  7. Phenylnaphthalene as a Heat Transfer Fluid for Concentrating Solar Power: High-Temperature Static Experiments

    SciTech Connect (OSTI)

    Bell, Jason R; Joseph III, Robert Anthony; McFarlane, Joanna; Qualls, A L

    2012-05-01

    Concentrating solar power (CSP) may be an alternative to generating electricity from fossil fuels; however, greater thermodynamic efficiency is needed to improve the economics of CSP operation. One way of achieving improved efficiency is to operate the CSP loop at higher temperatures than the current maximum of about 400 C. ORNL has been investigating a synthetic polyaromatic oil for use in a trough type CSP collector, to temperatures up to 500 C. The oil was chosen because of its thermal stability and calculated low vapor and critical pressures. The oil has been synthesized using a Suzuki coupling mechanism and has been tested in static heating experiments. Analysis has been conducted on the oil after heating and suggests that there may be some isomerization taking place at 450 C, but the fluid appears to remain stable above that temperature. Tests were conducted over one week and further tests are planned to investigate stabilities after heating for months and in flow configurations. Thermochemical data and thermophysical predictions indicate that substituted polyaromatic hydrocarbons may be useful for applications that run at higher temperatures than possible with commercial fluids such as Therminol-VP1.

  8. Method for producing high carrier concentration p-Type transparent conducting oxides

    DOE Patents [OSTI]

    Li, Xiaonan; Yan, Yanfa; Coutts, Timothy J.; Gessert, Timothy A.; Dehart, Clay M.

    2009-04-14

    A method for producing transparent p-type conducting oxide films without co-doping plasma enhancement or high temperature comprising: a) introducing a dialkyl metal at ambient temperature and a saturated pressure in a carrier gas into a low pressure deposition chamber, and b) introducing NO alone or with an oxidizer into the chamber under an environment sufficient to produce a metal-rich condition to enable NO decomposition and atomic nitrogen incorporation into the formed transparent metal conducting oxide.

  9. Challenge to Move from 'One Size Fits All' to PV Modules the Customer Needs: Preprint

    SciTech Connect (OSTI)

    Kurtz, S.; Wohlgemuth, J.; Hacke, P.; Bosco, N.; Kempe, M.; Smith, R.; Packard, C. E.

    2011-09-01

    Historically, PV companies requested a single qualification test for a single product. As the market has grown, there have been increasing opportunities for companies to differentiate their products while still maintaining high manufacturing volumes of each product. At the same time, as PV is deployed in an increasingly broad range of conditions, modules need to be able to withstand a wide range of stresses. In some cases, targeting a specific deployment condition may allow reduction of product cost. Realizing this opportunity will require the ability to confidently predict long-term performance based on accelerated tests and known weather conditions. By working together, the community can most quickly develop tests that identify which products perform well under which conditions. This paper discusses some of the challenges of predicting long-term PV performance, including the wide range of stresses that may be encountered, the variability of the stresses from moment to moment, the complexity of some degradation mechanisms, and the dependence of accelerated testing on module geometry. The paper also describes two international projects that deal with location-specific durability evaluation and long-term module performance.

  10. Features of primary damage by high energy displacement cascades in concentrated Ni-based alloys

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

    Béland, Laurent Karim; Lu, Chenyang; Osetskiy, Yuri N.; Samolyuk, German D.; Caro, Alfredo; Wang, Lumin; Stoller, Roger E.

    2016-02-25

    Alloying of Ni with Fe or Co reduces primary damage production under ion irradiation. Similar results have been obtained from classical molecular dynamics simulations of 1, 10, 20, and 40 keV collision cascades in Ni, NiFe, and NiCo. In all cases, a mix of imperfect stacking fault tetrahedra, faulted loops with a 1/3 {111} Burgers vector, and glissile interstitial loops with a 1/2 {110} Burgers vector were formed, along with small sessile point defect complexes and clusters. Primary damage reduction occurs by three mechanisms. First, Ni-Co, Ni-Fe, Co-Co, and Fe-Fe short-distance repulsive interactions are stiffer than Ni-Ni interactions, which leadmore » to a decrease in damage formation during the transition from the supersonic ballistic regime to the sonic regime. This largely controls final defect production. Second, alloying decreases thermal conductivity, leading to a longer thermal spike lifetime. The associated annealing reduces final damage production. These two mechanisms are especially important at cascades energies less than 40 keV. Third, at the higher energies, the production of large defect clusters by subcascades is inhibited in the alloys. A number of challenges and limitations pertaining to predictive atomistic modeling of alloys under high-energy particle irradiation are discussed.« less

  11. GaInP/GaAs/GaInAs Monolithic Tandem Cells for High-Performance Solar Concentrators

    SciTech Connect (OSTI)

    Wanlass, M. W.; Ahrenkiel, S. P.; Albin, D. S.; Carapella, J. J.; Duda, A.; Emery, K.; Geisz, J. F.; Jones, K.; Kurtz, S.; Moriarty, T.; Romero, M. J.

    2005-08-01

    We present a new approach for ultra-high-performance tandem solar cells that involves inverted epitaxial growth and ultra-thin device processing. The additional degree of freedom afforded by the inverted design allows the monolithic integration of high-, and medium-bandgap, lattice-matched (LM) subcell materials with lower-bandgap, lattice-mismatched (LMM) materials in a tandem structure through the use of transparent compositionally graded layers. The current work concerns an inverted, series-connected, triple-bandgap, GaInP (LM, 1.87 eV)/GaAs (LM, 1.42 eV)/GaInAs (LMM, {approx}1 eV) device structure grown on a GaAs substrate. Ultra-thin tandem devices are fabricated by mounting the epiwafers to pre-metallized Si wafer handles and selectively removing the parent GaAs substrate. The resulting handle-mounted, ultra-thin tandem cells have a number of important advantages, including improved performance and potential reclamation/reuse of the parent substrate for epitaxial growth. Additionally, realistic performance modeling calculations suggest that terrestrial concentrator efficiencies in the range of 40-45% are possible with this new tandem cell approach. A laboratory-scale (0.24 cm2), prototype GaInP/GaAs/GaInAs tandem cell with a terrestrial concentrator efficiency of 37.9% at a low concentration ratio (10.1 suns) is described, which surpasses the previous world efficiency record of 37.3%.

  12. Budgeting for Solar PV Plant Operations & Maintenance: Practices and Pricing.

    SciTech Connect (OSTI)

    Enbar, Nadav; Weng, Dean; Klise, Geoffrey Taylor

    2015-12-01

    With rising grid interconnections of solar photovoltaic (PV) systems, greater attention is being trained on lifecycle performance, reliability, and project economics. Expected to meet production thresholds over a 20-30 year timeframe, PV plants require a steady diet of operations and maintenance (O&M) oversight to meet contractual terms. However, industry best practices are only just beginning to emerge, and O&M budgets—given the arrangement of the solar project value chain—appear to vary widely. Based on insights from in-depth interviews and survey research, this paper presents an overview of the utility-scale PV O&M budgeting process along with guiding rationales, before detailing perspectives on current plant upkeep activities and price points largely in the U.S. It concludes by pondering potential opportunities for improving upon existing O&M budgeting approaches in ways that can benefi t the industry at-large.

  13. Budgeting for Solar PV Plant Operations & Maintenance: Practices and Pricing.

    SciTech Connect (OSTI)

    Enbar, Nadav; Weng, Dean; Klise, Geoffrey Taylor

    2016-01-01

    With rising grid interconnections of solar photovoltaic (PV) systems, greater attention is being trained on lifecycle performance, reliability, and project economics. Expected to meet production thresholds over a 20-30 year timeframe, PV plants require a steady diet of operations and maintenance (O&M) oversight to meet contractual terms. However, industry best practices are only just beginning to emerge, and O&M budgets—given the arrangement of the solar project value chain—appear to vary widely. Based on insights from in-depth interviews and survey research, this paper presents an overview of the utility-scale PV O&M budgeting process along with guiding rationales, before detailing perspectives on current plant upkeep activities and price points largely in the U.S. It concludes by pondering potential opportunities for improving upon existing O&M budgeting approaches in ways that can benefit the industry at-large.

  14. PV Cell and Module Calibration Activities at NREL

    SciTech Connect (OSTI)

    Emery, K.; Anderberg, A.; Kiehl, J.; Mack, C.; Moriarty, T.; Ottoson, L.; Rummel, S.

    2005-11-01

    The performance of PV cells and modules with respect to standard reference conditions is a key indicator of progress of a given technology. This task provides the U.S. terrestrial PV community with the most accurate measurements that are technically possible in a timely fashion. The international module certification and accreditation program PVGap requires certification laboratories to maintain their calibration traceability path to groups like this one. The politics of a "world record" efficiency requires that an independent laboratory perform these measurements for credibility. Most manufacturers base their module peak watt rating upon standards and reference cells calibrated under this task. This task has been involved in reconciling disputes between manufacturers and their cell suppliers in terms of expected versus actual performance. This task has also served as a resource to the PV community for consultation on solar simulation, current versus voltage measurement instrumentation, measurement procedures and measurement artifacts.

  15. 100-NR-2 Apatite Treatability Test FY09 Status: High Concentration Calcium-Citrate-Phosphate Solution Injection for In Situ Strontium-90 Immobilization

    SciTech Connect (OSTI)

    Vermeul, Vincent R.; Fritz, Brad G.; Fruchter, Jonathan S.; Szecsody, James E.; Williams, Mark D.

    2009-12-16

    100-NR-2 Apatite Treatability Test FY09 Status: High Concentration Calcium-Citrate-Phosphate Solution Injection for In Situ Strontium-90 Immobilization INTERIM LETTER REPORT

  16. Correlations in Characteristic Data of Concentrator Photovoltaics (Poster)

    SciTech Connect (OSTI)

    Sweet, C.; Bosco, N.; Kurtz, S.

    2011-02-01

    This study is motivated by a reported 1-2% infant mortality rate in concentrator photovoltaic cell assemblies. Approximately 650 bare III-V multi-junction PV cells were initially characterized via electroluminescence imaging and both light and dark current-voltage responses were recorded. The cells were then packaged into receivers and their IV response again evaluated both before and after an outdoor high concentration exposure of at least four hours above 750 DNI. Correlations exist between the initial dark IV characteristic and artifacts found in the EL image. Initial results also suggest that artifacts observed in the bare cell may serve as an indicator for early on-sun degradation, though may not be able to predict the infant mortality population.

  17. Selecting Solar: Insights into Residential Photovoltaic (PV) Quote Variation

    SciTech Connect (OSTI)

    Davidson, Carolyn; Margolis, Robert

    2015-10-01

    Before investing in a system, a prospective PV customer must not only have initial concept 'buy in,' but also be able to evaluate the tradeoffs associated with different system parameters. Prospective customers might need to evaluate disparate costs for each system attribute by comparing multiple bids. The difficulty of making such an evaluation with limited information can create a cognitive barrier to proceeding with the investment. This analysis leverages recently available data from EnergySage, an online solar marketplace, to offer the first data-driven characterization of quote variation faced by prospective PV customers, lending early insight into the decisions customers face once they have initial buy-in.

  18. Toward integrated PV panels and power electronics using printing technologies

    SciTech Connect (OSTI)

    Ababei, Cristinel; Yuvarajan, Subbaraya; Schulz, Douglas L.

    2010-07-15

    In this paper, we review the latest developments in the area of printing technologies with an emphasis on the fabrication of control-embedded photovoltaics (PV) with on-board active and passive devices. We also review the use of power converters and maximum power point tracking (MPPT) circuits with PV panels. Our focus is on the investigation of the simplest implementations of such circuits in view of their integration with solar cells using printing technologies. We see this concept as potentially enabling toward further cost reduction. Besides a discussion as to feasibility, we shall also present some projections and guidelines toward possible integration. (author)

  19. Systems for Solar Fuels Generation Utilizing PV and Electrolysis Workshop

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

    (Newark, Delaware) - JCAP Systems for Solar Fuels Generation Utilizing PV and Electrolysis Workshop (Newark, Delaware) Systems for Solar Fuels Generation Utilizing PV and Electrolysis Workshop (Newark, Delaware) Mon, Mar 7, 2016 11:30am 11:30 Tue, Mar 8, 2016 12:30pm 12:30 University of Delaware Newark, Delaware Frances Houle, "Solar Fuels Systems Research in the Joint Center for Artificial Photosynthesis" March 6 80th Annual Conference of the DPG & DPG Spring Meeting

  20. Outdoor PV Module Degradation of Current-Voltage Parameters: Preprint

    SciTech Connect (OSTI)

    Smith, R. M.; Jordan, D. C.; Kurtz, S. R.

    2012-04-01

    Photovoltaic (PV) module degradation rate analysis quantifies the loss of PV power output over time and is useful for estimating the impact of degradation on the cost of energy. An understanding of the degradation of all current-voltage (I-V) parameters helps to determine the cause of the degradation and also gives useful information for the design of the system. This study reports on data collected from 12 distinct mono- and poly-crystalline modules deployed at the National Renewable Energy Laboratory (NREL) in Golden, Colorado. Most modules investigated showed < 0.5%/year decrease in maximum power due to short-circuit current decline.

  1. Modular Power Converters for PV Applications

    SciTech Connect (OSTI)

    Ozpineci, Burak; Tolbert, Leon M

    2012-05-01

    This report describes technical opportunities to serve as parts of a technological roadmap for Shoals Technologies Group in power electronics for PV applications. There are many different power converter circuits that can be used for solar inverter applications. The present applications do not take advantage of the potential for using common modules. We envision that the development of a power electronics module could enable higher reliability by being durable and flexible. Modules would have fault current limiting features and detection circuits such that they can limit the current through the module from external faults and can identify and isolate internal faults such that the remaining modules can continue to operate with only minimal disturbance to the utility or customer. Development of a reliable, efficient, low-cost, power electronics module will be a key enabling technology for harnessing more power from solar panels and enable plug and play operation. Power electronics for computer power supplies, communication equipment, and transportation have all targeted reliability and modularity as key requirements and have begun concerted efforts to replace monolithic components with collections of common smart modules. This is happening on several levels including (1) device level with intelligent control, (2) functional module level, and (3) system module. This same effort is needed in power electronics for solar applications. Development of modular units will result in standard power electronic converters that will have a lower installed and operating cost for the overall system. These units will lead to increased adaptability and flexibility of solar inverters. Incorporating autonomous fault current limiting and reconfiguration capabilities into the modules and having redundant modules will lead to a durable converter that can withstand the rigors of solar power generation for more than 30 years. Our vision for the technology roadmap is that there is no need for detailed design of new power converters for each new application or installation. One set of modules and controllers can be pre-developed and the only design question would be how many modules need to be in series or parallel for the specific power requirement. Then, a designer can put the modules together and add the intelligent reconfigurable controller. The controller determines how many modules are connected, but it might also ask for user input for the specific application during setup. The modules include protection against faults and can reset it, if necessary. In case of a power device failure, the controller reconfigures itself to continue limited operation until repair which might be as simple as taking the faulty module out and inserting a new module. The result is cost savings in design, maintenance, repair, and a grid that is more reliable and available. This concept would be a perfect fit for the recently announced funding opportunity announcement (DE-FOA-0000653) on Plug and Play Photovoltaics.

  2. Final Report- High Penetration Solar PV Deployment Sunshine State Solar

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

    Energy technical report describes the activities carried out, key accomplishments, and recommendations from the DOE's Chemical Hydrogen Storage Center of Excellence, led by Los Alamos National Laboratory with Pacific Northwest National Laboratory from 2005 through 2010. The center's focus was the development of advanced chemical hydrogen storage materials that had the potential to meet the DOE's system targets for hydrogen storage onboard light-duty vehicles. PDF icon Final Report for the

  3. Corrosion behavior of Ni and Ni-based alloys in concentrated NaOH solutions at high temperatures

    SciTech Connect (OSTI)

    Yasuda, M.; Fukumoto, K.; Ogata, Y.; Hine, F.

    1988-12-01

    Corrosion behavior of SUS 310S austenitic stainless steel, Alloy 600, Monel 400, and Ni 200 and NaOH solutions in the concentration range 30-60% at high temperatures up to 166/sup 0/C was studied. In solutions containing dissolved oxygen or under oxidizing conditions, all the specimens examined were corroded seriously due to oxygen diffusion through the porous oxide layer consisting of ..beta..-Ni(OH)/sub 2/. In hydrogen-saturated solutions, on the other hand, these Ni alloys were corrosion resistant because nickel in the alloys was active to oxidation of hydrogen. The specimens were corroded by deaerated solution at high temperatures in which hydrogen evolution took place as the counterreaction. The corrosion rate controlled by the hydrogen formation reaction increased exponentially with the decrease of the Ni content in the alloy.

  4. High 400?C operation temperature blue spectrum concentration solar junction in GaInN/GaN

    SciTech Connect (OSTI)

    Zhao, Liang; Detchprohm, Theeradetch; Wetzel, Christian

    2014-12-15

    Transparent wide gap junctions suitable as high temperature, high flux topping cells have been achieved in GaInN/GaN by metal-organic vapor phase epitaxy. In structures of 25 quantum wells (QWs) under AM1.5G illumination, an open circuit voltage of 2.1?V is achieved. Of the photons absorbed in the limited spectral range of <450?nm, 64.2% are converted to electrons collected at the contacts under zero bias. At a fill factor of 45%, they account for a power conversion efficiency of38.6%. Under concentration, the maximum output power density per sun increases from 0.49?mW/cm{sup 2} to 0.51?mW/cm{sup 2} at 40?suns and then falls 0.42?mW/cm{sup 2} at 150?suns. Under external heating, a maximum of 0.59?mW/cm{sup 2} is reached at 250?C. Even at 400?C, the device is fully operational and exceeds room temperature performance. A defect analysis suggests that significantly higher fill factors and extension into longer wavelength ranges are possible with further development. The results prove GaInN/GaN QW solar junctions a viable and rugged topping cell for concentrator photovoltaics with minimal cooling requirements. By capturing the short range spectrum, they reduce the thermal load to any conventional cells stacked behind.

  5. DOE Request for Information (RFI) DE-FOA-0000153 PV Manufacturing Initiative: Summary Report, February 2010

    SciTech Connect (OSTI)

    Not Available

    2010-02-01

    This document sums up results of the PV Manufacturing Request for Information (RFI), DE-FOA-0000153, which supports the PV Manufacturing Initiative, launched by DOE Solar Energy Technologies Program.

  6. Dynamic Model Validation of PV Inverters Under Short-Circuit Conditions: Preprint

    SciTech Connect (OSTI)

    Muljadi, E.; Singh, M.; Bravo, R.; Gevorgian, V.

    2013-03-01

    Photovoltaic (PV) modules have dramatically decreased in price in the past few years, spurring the expansion of photovoltaic deployment. Residential and commercial rooftop installations are connected to the distribution network; large-scale installation PV power plants (PVPs) have benefited from tax incentives and the low cost of PV modules. As the level penetration of PV generation increases, the impact on power system reliability will also be greater. Utility power system planners must consider the role of PV generation in power systems more realistically by representing PV generation in dynamic stability analyses. Dynamic models of PV inverters have been developed in the positive sequence representation. NREL has developed a PV inverter dynamic model in PSCAD/EMTDC. This paper validates the dynamic model with an actual hardware bench test conducted by Southern California Edison's Distributed Energy Resources laboratory. All the fault combinations -- symmetrical and unsymmetrical -- were performed in the laboratory. We compare the simulation results with the bench test results.

  7. Climatically Diverse Data Set for Flat-Plate PV Module Model Validations (Presentation)

    SciTech Connect (OSTI)

    Marion, B.

    2013-05-01

    Photovoltaic (PV) module I-V curves were measured at Florida, Colorado, and Oregon locations to provide data for the validation and development of models used for predicting the performance of PV modules.

  8. Breakout Session: Getting in the Loop: PV Hardware Recycling and Sustainability

    Broader source: Energy.gov [DOE]

    As PV system installations continue to ramp up across the United States, the process for handling used and expired PV modules in the next  20-30 years would benefit from serious planning and...

  9. China Sunergy Co Ltd CEEG Nanjing PV Tech Co Ltd | Open Energy...

    Open Energy Info (EERE)

    Sunergy Co Ltd CEEG Nanjing PV Tech Co Ltd Jump to: navigation, search Name: China Sunergy Co Ltd (CEEG Nanjing PV-Tech Co Ltd) Place: Nanjing, Jiangsu Province, China Zip: 211100...

  10. Delamination Failures in Long-Term Field Aged PV Modules from...

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

    Delamination Failures in Long-Term Field Aged PV Modules from Point of View of Encapsulant Delamination Failures in Long-Term Field Aged PV Modules from Point of View of ...

  11. Concentrating Solar Power Forum Concentrating Photovoltaics (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2008-05-06

    This presentation's summaries: a convenient truth, comparison of three concentrator technologies, value of high efficiency, and status of industry.

  12. PV technology differences and discrepancies in modelling between simulation programs and measurements

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

    sensitivity and limitations of present and alternative PV models The sensitivity and limitations of present and alternative PV models Steve Ransome - Independent PV Consultant, SRCL, UK Juergen Sutterlueti - TEL Solar, Switzerland Sandia PV Modelling Workshop; Santa Clara, USA 1 st May 2013 Published by Sandia National Laboratories with the permission of the author * Many recent independent outdoor studies find <±5% kWh/kWp (with different rankings between technologies) there's less kWh/kWp

  13. Video: O&M Best Practices for Small-Scale PV Systems Success Story |

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

    Department of Energy O&M Best Practices for Small-Scale PV Systems Success Story Video: O&M Best Practices for Small-Scale PV Systems Success Story See how the Federal Energy Management Program's eTraining course, O&M Best Practices for Small-Scale PV Systems, helped federal energy and facility management professionals complete successful photovoltaics (PV) projects

  14. Rethinking Standby & Fixed Cost Charges: Regulatory & Rate Design Pathways to Deeper Solar PV Cost Reductions

    Broader source: Energy.gov [DOE]

    While solar PV's impact on utilities has been frequently discussed the past year, little attention has been paid to the potentially impact posed by solar PV-specific rate designs (often informally referred to as solar "fees" or "taxes") upon non-hardware "soft" cost reductions. In fact, applying some rate designs to solar PV customers could potentially have a large impact on the economics of PV systems.

  15. Microsoft Word - 2016 PV Systems Symposium - Save the Date v6.docx

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

    Sandia/EPRI PV Symposium - Save the Date! Save the Date and Call for Abstracts Sandia-EPRI 2016 PV Systems Symposium May 9-11 th at the Biltmore Hotel in Santa Clara, CA Sandia National Laboratories (SNL) and the Electric Power Research Institute (EPRI) are delighted to host this symposium on the technical challenges and opportunities related to solar photovoltaic (PV) systems and technologies. Core areas of focus will include PV performance modeling, distribution hosting capacity and screening

  16. Junction Evolution During Fabrication of CdS/CdTe Thin-film PV Solar Cells (Presentation)

    SciTech Connect (OSTI)

    Gessert, T. A.

    2010-09-01

    Discussion of the formation of CdTe thin-film PV junctions and optimization of CdTe thin-film PV solar cells.

  17. SunShot Presentation PV Module Reliabity Workshop Opening Session

    Broader source: Energy.gov [DOE]

    This PowerPoint slide deck was originally presented at the opening session of the 2013 NREL PV Module Reliability Workshop on Feb. 26-27, 2013 in Golden, CO. It provides an overview of the DOE SunShot initiative, discusses systems integration and technology validation activities, and highlighted the goals and key agenda items for the workshop.

  18. Selecting Solar. Insights into Residential Photovoltaic (PV) Quote Variation

    SciTech Connect (OSTI)

    Davidson, Carolyn; Margolis, Robert

    2015-10-01

    This analysis leverages available data from EnergySage, an online solar marketplace, to offer the first data-driven characterization of quote variation faced by prospective PV customers, lending early insight into the decisions customers face once they have initial buy-in.

  19. Silicon Oxynitride Thin Film Barriers for PV Packaging (Poster)

    SciTech Connect (OSTI)

    del Cueto, J. A.; Glick, S. H.; Terwilliger, K. M.; Jorgensen, G. J.; Pankow, J. W.; Keyes, B. M.; Gedvilas, L. M.; Pern, F. J.

    2006-10-03

    Dielectric, adhesion-promoting, moisture barriers comprised of silicon oxynitride thin film materials (SiOxNy with various material stoichiometric compositions x,y) were applied to: 1) bare and pre-coated soda-lime silicate glass (coated with transparent conductive oxide SnO2:F and/or aluminum), and polymer substrates (polyethylene terephthalate, PET, or polyethylene napthalate, PEN); plus 2) pre- deposited photovoltaic (PV) cells and mini-modules consisting of amorphous silicon (a-Si) and copper indium gallium diselenide (CIGS) thin-film PV technologies. We used plasma enhanced chemical vapor deposition (PECVD) process with dilute silane, nitrogen, and nitrous oxide/oxygen gas mixtures in a low-power (< or = 10 milliW per cm2) RF discharge at ~ 0.2 Torr pressure, and low substrate temperatures < or = 100(degrees)C, over deposition areas ~ 1000 cm2. Barrier properties of the resulting PV cells and coated-glass packaging structures were studied with subsequent stressing in damp-heat exposure at 85(degrees)C/85% RH. Preliminary results on PV cells and coated glass indicate the palpable benefits of the barriers in mitigating moisture intrusion and degradation of the underlying structures using SiOxNy coatings with thicknesses in the range of 100-200 nm.

  20. Opportunities and Challenges for Power Electronics in PV Modules (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Deline, C.; Wohlgemuth, J.; Marion, B.; Granata, J.

    2011-02-01

    The presentation describes the value of adding DC converters and other power electronics to modules to improve their output even when shading or bad cells would otherwise decrease the module output. The presentation was part of a workshop sponsored by ARPA-E exploring the opportunities for power electronics to support PV applications.

  1. Accelerated Light Aging of PV Encapsulants | Department of Energy

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

    Correlation of Xenon Arc and Mirror Accelerated Outdoor Aging from 1993-1997 PDF icon pvmrw13_uvth_str_reid.pdf More Documents & Publications Literature Review of the Effects of UV Exposure on PV Modules Retrospective Benefit-Cost Evaluation of DOE Investment in Photovoltaic Energy Systems Retrospective Benefit-Cost Evaluation of DOE Investments in Photovoltaic Energy Systems

  2. PV Systems Reliability Final Technical Report: Ground Fault Detection

    SciTech Connect (OSTI)

    Lavrova, Olga; Flicker, Jack David; Johnson, Jay

    2016-01-01

    We have examined ground faults in PhotoVoltaic (PV) arrays and the efficacy of fuse, current detection (RCD), current sense monitoring/relays (CSM), isolation/insulation (Riso) monitoring, and Ground Fault Detection and Isolation (GFID) using simulations based on a Simulation Program with Integrated Circuit Emphasis SPICE ground fault circuit model, experimental ground faults installed on real arrays, and theoretical equations.

  3. Minnesota Power- Solar-Electric (PV) Rebate Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    Minnesota Power offers a rebate of $1,000 per kilowatt (kW) DC for grid-connected solar-electric (PV) systems, with a maximum award of $20,000 per customer or 60% installed costs per customer. This...

  4. Solar PV Manufacturing Cost Model Group: Installed Solar PV System Prices (Presentation)

    SciTech Connect (OSTI)

    Goodrich, A. C.; Woodhouse, M.; James, T.

    2011-02-01

    EERE's Solar Energy Technologies Program is charged with leading the Secretary's SunShot Initiative to reduce the cost of electricity from solar by 75% to be cost competitive with conventional energy sources without subsidy by the end of the decade. As part of this Initiative, the program has funded the National Renewable Energy Laboratory (NREL) to develop module manufacturing and solar PV system installation cost models to ensure that the program's cost reduction targets are carefully aligned with current and near term industry costs. The NREL cost analysis team has leveraged the laboratories' extensive experience in the areas of project finance and deployment, as well as industry partnerships, to develop cost models that mirror the project cost analysis tools used by project managers at leading U.S. installers. The cost models are constructed through a "bottoms-up" assessment of each major cost element, beginning with the system's bill of materials, labor requirements (type and hours) by component, site-specific charges, and soft costs. In addition to the relevant engineering, procurement, and construction costs, the models also consider all relevant costs to an installer, including labor burdens and overhead rates, supply chain costs, and overhead and materials inventory costs, and assume market-specific profits.

  5. DOE Request for Information (RFI) DE-FOA-0000153 PV Manufacturing Initiative

    SciTech Connect (OSTI)

    none,

    2010-02-01

    This draft report summarizes the results of the U.S. Department of Energy PV Manufacturing Request for Information (RFI), DE-FOA-0000153, that was released in September 2009. The PV Manufacturing Initiative is intended to help facilitate the development of a strong PV manufacturing industry in the United States.

  6. Going Solar in Record Time with Plug-and-Play PV | Department...

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

    Going Solar in Record Time with Plug-and-Play PV Going Solar in Record Time with Plug-and-Play PV April 24, 2012 - 6:10pm Addthis A plug-and-play PV system is envisioned as a...

  7. Distributed Solar PV for Electricity System Resiliency: Policy and Regulatory Considerations (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2014-11-01

    Distributed Solar PV systems have the potential of increasing the grid's resiliency to unforeseen events, such as extreme weather events and attacks. This paper presents the role that distributed PV can play in electric grid resiliency, introduces basic system design requirements and options, and discusses the regulatory and policy options for supporting the use of distributed PV for the purpose of increased electricity resiliency.

  8. Concentrating Photovoltaics (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2009-01-20

    Solar is growing rapidly, and the concentrating photovoltaics industry-both high- and low-concentration cell approaches-may be ready to ramp production in 2009.

  9. PV Module Intraconnect Thermomechanical Durability Damage Prediction...

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

    More Documents & Publications FY2015 Status Report: CIRFT Testing of High-Burnup Used Nuclear Fuel Rods from Pressurized Water Reactor and BWR Environments 2014 Propulsion ...

  10. Evaluation of annual efficiencies of high temperature central receiver concentrated solar power plants with thermal energy storage.

    SciTech Connect (OSTI)

    Ehrhart, Brian David; Gill, David Dennis

    2013-07-01

    The current study has examined four cases of a central receiver concentrated solar power plant with thermal energy storage using the DELSOL and SOLERGY computer codes. The current state-of-the-art base case was compared with a theoretical high temperature case which was based on the scaling of some input parameters and the estimation of other parameters based on performance targets from the Department of Energy SunShot Initiative. This comparison was done for both current and high temperature cases in two configurations: a surround field with an external cylindrical receiver and a north field with a single cavity receiver. There is a fairly dramatic difference between the design point and annual average performance, especially in the solar field and receiver subsystems, and also in energy losses due to the thermal energy storage being full to capacity. Additionally, there are relatively small differences (<2%) in annual average efficiencies between the Base and High Temperature cases, despite an increase in thermal to electric conversion efficiency of over 8%. This is due the increased thermal losses at higher temperature and operational losses due to subsystem start-up and shut-down. Thermal energy storage can mitigate some of these losses by utilizing larger thermal energy storage to ensure that the electric power production system does not need to stop and re-start as often, but solar energy is inherently transient. Economic and cost considerations were not considered here, but will have a significant impact on solar thermal electric power production strategy and sizing.

  11. PV Cell and Module Calibrations at NREL

    SciTech Connect (OSTI)

    Emery, Keith

    2012-10-22

    NREL has equipment to measure any conceivable cell or module technology. The lack of standards for low concentration modules complicates matters. Spectrally adjustable simulators are critical for more than three junctions. NREL's 10-channel fiber optic simulator has shown that the light can be set for each junction within 1% of what it would be under the reference spectrum for up to a five-junction cell. Uncertainty in module simulators dominated by spatial nonuniformity for calibration labs. Manufacturers can mitigate this error by using matched reference modules instead of cells.

  12. Going Solar in Record Time with Plug-and-Play PV | Department of Energy

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

    Going Solar in Record Time with Plug-and-Play PV Going Solar in Record Time with Plug-and-Play PV April 24, 2012 - 6:10pm Addthis A plug-and-play PV system is envisioned as a consumer friendly solar technology that uses an automatic detection system to initiate communication between the solar energy system and the utility when plugged into a PV-ready circuit. | Photo by iStock. A plug-and-play PV system is envisioned as a consumer friendly solar technology that uses an automatic detection system

  13. Solar Photovoltaic Economic Development: Building and Growing a Local PV Industry, August 2011 (Book)

    SciTech Connect (OSTI)

    Not Available

    2011-08-01

    The U.S. photovoltaic (PV) industry is forecast to grow, and it represents an opportunity for economic development and job creation in communities throughout the United States. This report helps U.S. cities evaluate economic opportunities in the PV industry. It serves as a guide for local economic development offices in evaluating their community?s competitiveness in the solar PV industry, assessing the viability of solar PV development goals, and developing strategies for recruiting and retaining PV companies to their areas.

  14. LPO5-002-Proj-Poster-PV-Alamosa

    Energy Savers [EERE]

    ALAMOSA Innovative tracking and concentrating optics increase the e ciency of Alamosa, the world's largest high concentration photovoltaic solar system. INVESTING in AMERICAN ENERGY OWNERS Cogentrix Power & Carlyle Infrastructure Partners LOCATION Alamosa, Colorado LOAN AMOUNT $90.6 Million ISSUANCE DATE September 2011 GENERATION CAPACITY 29 MW PROJECTED ANNUAL GENERATION 58,000 MWh CLIMATE BENEFIT 34,000 Metric Tons of CO 2 Prevented Annually

  15. High Penetration Solar Deployment Funding Opportunity | Department...

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

    Through the High Penetration Solar Deployment program, DOE is funding solar projects that are accelerating the placement of solar photovoltaic (PV) systems into existing and newly ...

  16. High Penetration Solar Deployment Funding Opportunity

    Broader source: Energy.gov [DOE]

    Through the High Penetration Solar Deployment program, DOE is funding solar projects that are accelerating the placement of solar photovoltaic (PV) systems into existing and newly designed...

  17. Comparison of the complete genome sequences of Pseudomonassyringae pv. syringae B728a and pv. tomato DC3000.

    SciTech Connect (OSTI)

    Feil, Helene; Feil, William S.; Chain, Patrick; Larimer, Frank; DiBartolo, Genevieve; Copeland, Alex; Lykidis, Athanasios; Trong,Stephen; Nolan, Matt; Goltsman, Eugene; Thiel, James; Malfatti,Stephanie; Loper, Joyce E.; Lapidus, Alla; Detter, John C.; Land, Miriam; Richardson, Paul M.; Kyrpides, Nikos C.; Ivanova, Natalia; Lindow, StevenE.

    2005-04-01

    The complete genomic sequence of Pseudomonas syringaepathovar syringae B728a (Pss B728a), has been determined and is comparedwith that of Pseudomonas syringae pv. tomato DC3000 (Pst DC3000). Thesetwo pathovars of this economically important species of plant pathogenicbacteria differ in host range and apparent patterns of interaction withplants, with Pss having a more pronounced epiphytic stage of growth andhigher abiotic stress tolerance and Pst DC3000 having a more pronouncedapoplastic growth habitat. The Pss B728a genome (6.1 megabases) containsa circular chromosome and no plasmid, whereas the Pst DC3000 genome is6.5 mbp in size, composed of a circular chromosome and two plasmids.While a high degree of similarity exists between the two sequencedPseudomonads, 976 protein-encoding genes are unique to Pss B728a whencompared to Pst DC3000, including large genomic islands likely tocontribute to virulence and host specificity. Over 375 repetitiveextragenic palindromic sequences (REPs) unique to Pss B728a when comparedto Pst DC3000 are widely distributed throughout the chromosome except in14 genomic islands, which generally had lower GC content than the genomeas a whole. Content of the genomic islands vary, with one containing aprophage and another the plasmid pKLC102 of P. aeruginosa PAO1. Among the976 genes of Pss B728a with no counterpart in Pst DC3000 are thoseencoding for syringopeptin (SP), syringomycin (SR), indole acetic acidbiosynthesis, arginine degradation, and production of ice nuclei. Thegenomic comparison suggests that several unique genes for Pss B728a suchas ectoine synthase, DNA repair, and antibiotic production may contributeto epiphytic fitness and stress tolerance of this organism. Pseudomonassyringae, a member of the gamma subgroup of the Proteobacteria, is awidespread bacterial pathogen of many plant species. The species P.syringae is subdivided into approximately 50 pathovars based onpathogenicity and host range. P. syringae is capable of producing avariety of different symptoms depending on the host species and site ofinfection. For example, it causes leaf spot diseases that defoliateplants such as tomato, bean, soybean, trunk cankers, and so-called"blast" diseases on fruit, nut and ornamental species. Considerablevariation occurs both between and within different pathovars of P.syringae (1). Because of its importance as a plant pathogen, it has beenthe subject of much research, especially of its epidemiology andvirulence mechanisms (2). Pseudomonas syringae pv. syringae (Pss) strainB728a is typical of most strains of this pathovar in that it exhibits avery pronounced epiphytic phase on plants. Such strains achieve andmaintain large populations on healthy plants, where they are exposed tostressful conditions such as dryness and sunlight that are hostile tobacterial growth(2). Epiphytic Pss populations serve as inocula that cansubsequently invade plants and initiate disease. Pss strains are distinctfrom many P. syringae strains, such as P. syringae pv. tomato (Pst)strain DC3000, that poorly colonize the exterior of plants; these strainsmay be considered "endophytes" based on their ability to multiply mostlywithin the plant (3). True epiphytes such as Pss B728a often reachsurface populations of over 107 cells/g while strains such as Pst DC3000seldom exceed 105 cells/g (2, 3). Thus, these strains might be consideredto occupy different ends of the epiphytic/endophytic spectrum of plantcolonization as described by Beattie and Lindow (4). As a pathogen and anepiphyte, Pss B728a has evolved to exploit at least two distincthabitats: the leaf surface and apoplast. Because rapid changes intemperature, low water content, and incident solar radiation occur onleaf surfaces, it has been hypothesized that the epiphyte Pss B728aposseses more genes conferring environmental stress tolerance than theendophyte Pst DC3000 (4). Pss B728a also exhibits several traits such asice nucleation activity and SR production (2) that are lacking in manyother strains of P. syringae including Pst DC3000. As the most icenucleation active bacterial species, P. syringae is responsible forinciting frost injury to frost sensitive plants that can supercool andavoid damaging ice formation if not colonized by ice nucleation activebacteria (2,4). We present here a genomic comparison between strains PssB728a and Pst DC3000 of P. syringae pathovars as well as between thesestrains and P. aeruginosa and P. putida, two additional Pseudomonadsrecently sequenced. These genomic comparisons provide insights into theevolutionary history and diverse life styles of the pseudomonads,including their association with the environment, plant or mammalianhosts.

  18. PV output smoothing using a battery and natural gas engine-generator.

    SciTech Connect (OSTI)

    Johnson, Jay; Ellis, Abraham; Denda, Atsushi; Morino, Kimio; Shinji, Takao; Ogata, Takao; Tadokoro, Masayuki

    2013-02-01

    In some situations involving weak grids or high penetration scenarios, the variability of photovoltaic systems can affect the local electrical grid. In order to mitigate destabilizing effects of power fluctuations, an energy storage device or other controllable generation or load can be used. This paper describes the development of a controller for coordinated operation of a small gas engine-generator set (genset) and a battery for smoothing PV plant output. There are a number of benefits derived from using a traditional generation resource in combination with the battery; the variability of the photovoltaic system can be reduced to a specific level with a smaller battery and Power Conditioning System (PCS) and the lifetime of the battery can be extended. The controller was designed specifically for a PV/energy storage project (Prosperity) and a gas engine-generator (Mesa Del Sol) currently operating on the same feeder in Albuquerque, New Mexico. A number of smoothing simulations of the Prosperity PV were conducted using power data collected from the site. By adjusting the control parameters, tradeoffs between battery use and ramp rates could be tuned. A cost function was created to optimize the control in order to balance, in this example, the need to have low ramp rates with reducing battery size and operation. Simulations were performed for cases with only a genset or battery, and with and without coordinated control between the genset and battery, e.g., without the communication link between sites or during a communication failure. The degree of smoothing without coordinated control did not change significantly because the battery dominated the smoothing response. It is anticipated that this work will be followed by a field demonstration in the near future.

  19. Jiangxi Sornid high tech Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Sornid high tech Co Ltd Jump to: navigation, search Name: Jiangxi Sornid high-tech Co Ltd Place: Jiujiang, Jiangxi Province, China Zip: 332900 Product: PV wafer producer....

  20. Quantify Degradation Rates and Mechanisms of PV Modules and Systems Installed in Florida Through Comprehensive Experimental and Theoretical Analysis (Poster)

    SciTech Connect (OSTI)

    Sorloaica-Hickman, N.; Davis, K.; Kurtz, S.; Jordan, D.

    2011-02-01

    The economic viability of photovoltaic (PV) technologies is inextricably tied to both the electrical performance and degradation rate of the PV systems, which are the generators of electrical power in PV systems. Over the past 15 years, performance data have been collected on numerous PV systems installed throughout the state of Florida and will be presented.

  1. Enhanced Modeling and Monitoring Tools for Distributed PV Interconnection

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

    Enhanced Modeling and Monitoring Tools for Distributed PV Interconnection" Mark Rawson, Sacramento Municipal Utility District and David Pinney, National Rural Electric Cooperative Association with introductory remarks by Rick Thompson, Greentech Media May 28, 2014 2 Purpose of Today's Meeting * Foster stakeholder collaboration and awareness o Learn about Green Tech Media's (GTM) new Grid Edge Initiative, Rick Thompson, GTM * Hear an example of how a municipal utility is planning for solar

  2. Sandia Labs and NREL Hosted Successful 2016 PV Reliability Workshop

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

    NREL Hosted Successful 2016 PV Reliability Workshop - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste

  3. Photovoltaic (PV) Module Level Remote Safety Disconnect - Energy Innovation

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

    Portal Find More Like This Return to Search Photovoltaic (PV) Module Level Remote Safety Disconnect National Renewable Energy Laboratory Contact NREL About This Technology Figure 1: System configuration of emergency module-level disconnect using module-level &lsquo;Isolation Detection Units&rsquo; (IDU).<br /> Figure 1: System configuration of emergency module-level disconnect using module-level 'Isolation Detection Units' (IDU). Technology Marketing Summary The ability to

  4. Efficient Nanostructured Silicon (Black Silicon) PV Devices - Energy

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

    Innovation Portal Efficient Nanostructured Silicon (Black Silicon) PV Devices National Renewable Energy Laboratory Contact NREL About This Technology Technology Marketing Summary Antireflective (AR) coatings on solar cells increase the efficiency of the cells by suppressing reflection, which allows more photons to enter a silicon (Si) wafer and increases the flow of electricity. Traditional AR coatings however, add significant cost to the solar cell manufacturing process. NREL scientists

  5. PV Validation and Bankability Workshop | Department of Energy

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

    presentation summarizes the information given by DOE during the Photovoltaic Validation and Bankability Workshop in San Jose, California, on August 31, 2011. PDF icon doe_lynn_pv_validation_2011_aug.pdf More Documents & Publications Overcoming the Barrier to Achieving Large-Scale Production - A Case Study Federal Energy Management Program Report Template Systems Integration (Fact Sheet), SunShot Initiative, U.S. Department of Energy (DOE)

  6. PG&E Plans for 500 MW of PV

    Broader source: Energy.gov [DOE]

    PG&E has developed a plan to install 500 MW of PV by the year 2015. The plan calls for 250 MW to be acquired through Power Purchase Agreements (PPA) and the other 250 MW to be purchased and owned by the utility. PG&E presented the plan at a public forum on April 27, 2009. A copy of the power point presentation is attached.

  7. NREL Provides PV Holiday Lights for Christmas Tree

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

    Provides PV Holiday Lights for Christmas Tree For more information contact: George Douglas (303) 275-4096 Golden, Colo., December 2, 1997 -- National Renewable Energy Laboratory (NREL) engineers are showing off the power of photovoltaics in Washington, D.C. again this holiday season. They have installed an 8-kilowatt solar array on the Ellipse just south of the White House to help power lights on the National Christmas Tree. The tree lighting ceremony on Dec. 4 begins Washington's 1997 Pageant

  8. NREL to request proposals for reducing PV costs

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

    Request Proposals for Reducing PV Costs For more information contact: George Douglas, (303) 275-4096 Golden, Colo., May 15, 1997 -- The U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL) invites the photovoltaics and related industries to join its Photovoltaic Manufacturing Technology (PVMaT) program in looking for ways to improve production processes and reduce the cost of photovoltaic products. NREL will issue in the next 90 days an $8 million request for proposals

  9. Center for Inverse Design Highlight: Iron Chalcogenide PV Absorbers

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

    Iron Chalcogenide Photovoltaic Absorbers The Center for Inverse Design has identified the iron-based ternary chalcogenide materials Fe 2 SiS 4 and Fe 2 GeS 4 as promising new photovoltaic materials, which circumvent the problems historically encountered with iron sulfide FeS 2 (iron pyrite). There is intense interest in earth-abundant materials, including iron-bearing systems, for the widespread development of photovoltaic (PV) technologies to sustainably meet growing energy needs. The inverse

  10. Sandia and EPRI to host PV symposium in May 2016

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

    EPRI to host PV symposium in May 2016 - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste Management

  11. Distributed PV Interconnection Screening Procedures and Online Tools

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

    Screening Procedures and Online Tools Page 1 of 9 Kristen Ardani, Joel Dickinson, Max Berger, David Crowell, Jeff Dickinson, Kelly Webster Page 1 of 9 [Speaker: Kristen Ardani] Cover Slide: Thank you everyone for joining us today for the DG Interconnection Collaborative. My name is Kristen Ardani,I'm an analyst here at NREL and the lead facilitator of the DGIC. We are fortunate today to have speakers Joel Dickinson of Salt River Project. We are going to discuss distributed PV interconnection

  12. GridPV Toolbox Version 2 Now Available

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

    GridPV Toolbox Version 2 Now Available - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Fuel Cycle Defense Waste Management

  13. Utility Participation in the Rooftop Solar PV Market Transcript

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

    Utility Participation in the Rooftop Solar PV Market Page 1 of 21 Kristen Ardani, Jurstin Orkney, Marc Romito Page 1 of 21 [Speaker: Kristen Ardani] Slide 1: Good afternoon, everyone. Thank you for joining the Distributed Generation Interconnection Collaborative Monthly Informational Webinar. My name is Kristen Ardani, and I'm an analyst here at NREL and the moderator for the DGIC. So today, we are kicking off 2016 with a joint presentation from two Arizona utilities that have implemented

  14. Voltage-matched multijunction solar cell architectures for integrating PV

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

    technologies - Energy Innovation Portal Find More Like This Return to Search Voltage-matched multijunction solar cell architectures for integrating PV technologies National Renewable Energy Laboratory Contact NREL About This Technology Technology Marketing Summary The U.S. Department of Energy SunShot Initiative aims to reduce the total installed cost of solar energy systems to $.06 per kilowatt-hour (kWh) by the year 2020. Reducing the cost of solar electricity requires that solar cell

  15. PV output variability modeling using satellite imagery.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Ellis, Abraham; Reno, Matthew J.

    2010-11-01

    High frequency irradiance variability measured on the ground is caused by the formation, dissipation, and passage of clouds in the sky. If we can identify and associate different cloud types/patterns from satellite imagery, we may be able to predict irradiance variability in areas lacking sensors. With satellite imagery covering the entire U.S., this allows for more accurate integration planning and power flow modeling over wide areas. Satellite imagery from southern Nevada was analyzed at 15 minute intervals over a year. Methods for image stabilization, cloud detection, and textural classification of clouds were developed and tested. High Performance Computing parallel processing algorithms were also investigated and tested. Artificial Neural Networks using imagery as inputs were trained on ground-based measurements of irradiance to model the variability and were tested to show some promise as a means for predicting irradiance variability.

  16. Performance of a multifunctional PV/T hybrid solar window

    SciTech Connect (OSTI)

    Davidsson, Henrik; Perers, Bengt; Karlsson, Bjoern

    2010-03-15

    A building-integrated multifunctional PV/T solar window has been developed and evaluated. It is constructed of PV cells laminated on solar absorbers placed in a window behind the glazing. To reduce the cost of the solar electricity, tiltable reflectors have been introduced in the construction to focus radiation onto the solar cells. The reflectors render the possibility of controlling the amount of radiation transmitted into the building. The insulated reflectors also reduce the thermal losses through the window. A model for simulation of the electric and hot water production was developed. The model can perform yearly energy simulations where different features such as shading of the cells or effects of the glazing can be included or excluded. The simulation can be run with the reflectors in an active, up right, position or in a passive, horizontal, position. The simulation program was calibrated against measurements on a prototype solar window placed in Lund in the south of Sweden and against a solar window built into a single family house, Solgaarden, in Aelvkarleoe in the central part of Sweden. The results from the simulation shows that the solar window annually produces about 35% more electric energy per unit cell area compared to a vertical flat PV module. (author)

  17. Measurement uncertainty analysis techniques applied to PV performance measurements

    SciTech Connect (OSTI)

    Wells, C.

    1992-10-01

    The purpose of this presentation is to provide a brief introduction to measurement uncertainty analysis, outline how it is done, and illustrate uncertainty analysis with examples drawn from the PV field, with particular emphasis toward its use in PV performance measurements. The uncertainty information we know and state concerning a PV performance measurement or a module test result determines, to a significant extent, the value and quality of that result. What is measurement uncertainty analysis It is an outgrowth of what has commonly been called error analysis. But uncertainty analysis, a more recent development, gives greater insight into measurement processes and tests, experiments, or calibration results. Uncertainty analysis gives us an estimate of the I interval about a measured value or an experiment's final result within which we believe the true value of that quantity will lie. Why should we take the time to perform an uncertainty analysis A rigorous measurement uncertainty analysis: Increases the credibility and value of research results; allows comparisons of results from different labs; helps improve experiment design and identifies where changes are needed to achieve stated objectives (through use of the pre-test analysis); plays a significant role in validating measurements and experimental results, and in demonstrating (through the post-test analysis) that valid data have been acquired; reduces the risk of making erroneous decisions; demonstrates quality assurance and quality control measures have been accomplished; define Valid Data as data having known and documented paths of: Origin, including theory; measurements; traceability to measurement standards; computations; uncertainty analysis of results.

  18. Thermal-mechanical stability of single crystal oxide refractive concentrators for high-temperature solar thermal propulsion

    SciTech Connect (OSTI)

    Zhu, D.; Jacobson, S.; Miller, R.A.

    1999-07-01

    Single crystal oxides such as yttria-stabilized zirconia (Y{sub 2}O{sub 3}-ZrO{sub 2}), yttrium aluminum garnet (Y{sub 3}Al{sub 5}O{sub 12}, or YAG), magnesium oxide (MgO) and sapphire (Al{sub 2}O{sub 3}) are candidate refractive secondary concentrator materials for high temperature solar propulsion applications. However, thermo-mechanical reliability of these components in severe thermal environments during the space mission sun/shade transition is of great concern. Simulated mission tests are important for evaluating these candidate oxide materials under a variety of transient and steady-state heat flux conditions, and thus provide vital information for the component design. In this paper, a controlled heat flux thermal shock test approach is established for the single crystal oxide materials using a 3.0 kW continuous wave CO{sub 2} laser, with a wavelength 10.6 micron. Thermal fracture behavior and failure mechanisms of these oxide materials are investigated and critical temperature gradients are determined under various temperature and heating conditions. The test results show that single crystal sapphire is able to sustain the highest temperature gradient and heating-cooling rate, and thus exhibit the best thermal shock resistance, as compared to the yttria-stabilized zirconia, yttrium aluminum garnet and magnesium oxide.

  19. Exploring the Economic Value of EPAct 2005's PV Tax Credits

    SciTech Connect (OSTI)

    Bolinger, Mark A; Wiser, Ryan; Ing, Edwin

    2009-08-01

    This CESA - LBNL Case Study examines how much economic value do new and expanded federal tax credits really provide to PV system purchasers, and what implications might they hold for state/utility PV grant programs. The report begins with a discussion of the taxability of PV grants and their interaction with federal credits, as this issue significantly affects the analysis that follows. We then calculate the incremental value of EPAct's new and expanded credits for PV systems of different sizes, and owned by different types of entities. The report concludes with a discussion of potential implications for purchasers of PV systems, as well as for administrators of state/utility PV programs. The market for grid-connected photovoltaics (PV) in the US has grown dramatically in recent years, driven in large part by PV grant or 'buy-down' programs in California, New Jersey, and many other states. The recent announcement of a new 11-year, $3.2 billion PV program in California suggests that state policy will continue to drive even faster growth over the next decade. Federal policy has also played a role, primarily by providing commercial PV systems access to tax benefits, including accelerated depreciation (5-year MACRS schedule) and a business energy investment tax credit (ITC). Since the signing of the Energy Policy Act of 2005 (EPAct) on August 8, the federal government has begun to play a much more significant role in supporting both commercial and residential PV systems. Specifically, EPAct increased the federal ITC for commercial PV systems from 10% to 30% of system costs, and also created a new 30% ITC (capped at $2000) for residential solar systems. Both changes went into effect on January 1, 2006, for an initial period of two years, and in late 2006 were extended for an additional year. Unless extended further, the new residential ITC will expire, and the 30% commercial ITC will revert back to 10%, on January 1, 2009. How much economic value do these new and expanded federal tax credits really provide to PV system purchasers? And what implications might they hold for state/utility PV grant programs? Using a generic (i.e., non-state-specific) cash flow model, this report explores these questions.1 We begin with a discussion of the taxability of PV grants and their interaction with federal credits, as this issue significantly affects the analysis that follows. We then calculate the incremental value of EPAct's new and expanded credits for PV systems of different sizes, and owned by different types of entities. We conclude with a discussion of potential implications for purchasers of PV systems, as well as for administrators of state/utility PV programs.

  20. Potential of Securitization in Solar PV Finance

    SciTech Connect (OSTI)

    Lowder, T.; Mendelsohn, M.

    2013-12-01

    This report aims to demonstrate, hypothetically and at a high level, what volumes of solar deployment could be supported given solar industry access to the capital markets in the form of security issuance. Securitization is not anticipated to replace tax equity in the near- to mid-term, but it could provide an additional source of funds that would be comparatively inexpensive and could reduce the weighted average cost of capital for a given solar project or portfolio. Thus, the potential to securitize solar assets and seek financing in the capital markets could help to sustain the solar industry when the investment tax credit (ITC) -- one of the federal incentives that has leveraged billions of dollars of private capital in the solar industry -- drops from 30% to 10% at the close of 2016. The report offers analysis on the size of the U.S. third-party financed solar market, as well as on the volumes (in MW) of solar asset origination possible through a $100 million securitization fund (assuming no overcollateralization). It also provides data on the size of the relevant securities markets and how the solar asset class may fit into these markets.

  1. AlGaAs/GaAs photovoltaic converters for high power narrowband radiation

    SciTech Connect (OSTI)

    Khvostikov, Vladimir; Kalyuzhnyy, Nikolay; Mintairov, Sergey; Potapovich, Nataliia; Shvarts, Maxim; Sorokina, Svetlana; Andreev, Viacheslav; Luque, Antonio

    2014-09-26

    AlGaAs/GaAs-based laser power PV converters intended for operation with high-power (up to 100 W/cm{sup 2}) radiation were fabricated by LPE and MOCVD techniques. Monochromatic (? = 809 nm) conversion efficiency up to 60% was measured at cells with back surface field and low (x = 0.2) Al concentration 'window'. Modules with a voltage of 4 V and the efficiency of 56% were designed and fabricated.

  2. Photovoltaics (PV) as an Eligible Measure in Residential PACE Programs: Benefits and Challenges (Fact Sheet)

    SciTech Connect (OSTI)

    Coughlin, J.

    2010-06-01

    Property Assessed Clean Energy (PACE) financing is one of several new financial models broadening access to clean energy by addressing the barrier of initial capital cost. The majority of the PACE programs in the market today include PV as an eligible measure. PV appeals to homeowners as a way to reduce utility bills, self-generate sustainable power, increase energy independence and demonstrate a commitment to the environment. If substantial state incentives for PV exist, PV projects can be economic under PACE, especially when partnered with good net metering policies. At the same time, PV is expensive relative to other eligible measures with a return on investment horizon that might exceed program targets. This fact sheet reviews the benefits and potential challenges of including PV in PACE programs.

  3. PROJECT PROFILE: PV Risk Reduction through Quantifying In-Field Energy |

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

    Department of Energy PV Risk Reduction through Quantifying In-Field Energy PROJECT PROFILE: PV Risk Reduction through Quantifying In-Field Energy Funding Opportunity: SuNLaMP SunShot Subprogram: Photovoltaics Location: National Renewable Energy Laboratory, Golden, CO Amount Awarded: $4,500,000 Photovoltaic (PV) system degradation rates are not currently assessed in a comprehensive, standardized manner and do not account for climate, mounting configuration, or technology details. This project

  4. NREL: Performance and Reliability R&D - PV Module Reliability Workshop

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

    PV Module Reliability Workshop NREL hosts an annual Photovoltaic Module Reliability Workshop (PVMRW) so that solar technology experts can share information leading to the improvement of PV module reliability. Such improvement reduces the cost of solar electricity and promotes investor confidence in the technology-both critical goals for moving PV technologies deeper into the electricity marketplace. 2017 Workshop The 2017 PVMRW is tentatively scheduled for Tuesday, February 28, to Thursday,

  5. NREL Solar Researcher Honored with World PV Award - News Releases | NREL

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

    NREL Solar Researcher Honored with World PV Award May 10, 2006 Golden, Colo. - Dr. Lawrence Kazmerski, a leading research director at the U.S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL), received the World PV Award at the Fourth World Conference on Photovoltaic Energy Conversion on May 9 for his outstanding contributions to the worldwide advancements of photovoltaic (PV) science and technology. The award, sponsored by professional organizations from the European,

  6. Final Technical Report: Advanced Measurement and Analysis of PV Derate Factors.

    SciTech Connect (OSTI)

    King, Bruce Hardison; Burton, Patrick D.; Hansen, Clifford; Jones, Christian Birk

    2015-12-01

    The Advanced Measurement and Analysis of PV Derate Factors project focuses on improving the accuracy and reducing the uncertainty of PV performance model predictions by addressing a common element of all PV performance models referred to as “derates”. Widespread use of “rules of thumb”, combined with significant uncertainty regarding appropriate values for these factors contribute to uncertainty in projected energy production.

  7. Measurement uncertainty analysis techniques applied to PV performance measurements

    SciTech Connect (OSTI)

    Wells, C.

    1992-10-01

    The purpose of this presentation is to provide a brief introduction to measurement uncertainty analysis, outline how it is done, and illustrate uncertainty analysis with examples drawn from the PV field, with particular emphasis toward its use in PV performance measurements. The uncertainty information we know and state concerning a PV performance measurement or a module test result determines, to a significant extent, the value and quality of that result. What is measurement uncertainty analysis? It is an outgrowth of what has commonly been called error analysis. But uncertainty analysis, a more recent development, gives greater insight into measurement processes and tests, experiments, or calibration results. Uncertainty analysis gives us an estimate of the I interval about a measured value or an experiment`s final result within which we believe the true value of that quantity will lie. Why should we take the time to perform an uncertainty analysis? A rigorous measurement uncertainty analysis: Increases the credibility and value of research results; allows comparisons of results from different labs; helps improve experiment design and identifies where changes are needed to achieve stated objectives (through use of the pre-test analysis); plays a significant role in validating measurements and experimental results, and in demonstrating (through the post-test analysis) that valid data have been acquired; reduces the risk of making erroneous decisions; demonstrates quality assurance and quality control measures have been accomplished; define Valid Data as data having known and documented paths of: Origin, including theory; measurements; traceability to measurement standards; computations; uncertainty analysis of results.

  8. A Comparison of Key PV Backsheet and Module Properties from Fielded...

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

    dupontgambogi.pdf More Documents & Publications Agenda for the PV Module Reliability Workshop, February 26 - 27 2013, Golden, Colorado DuPont's Journey to Build a Global ...

  9. Partially Shaded Operation of a Grid-Tied PV System: Preprint

    SciTech Connect (OSTI)

    Deline, C.

    2009-06-01

    This paper presents background and experimental results from a single-string grid-tied PV system, operated under a variety of shading conditions.

  10. PROJECT PROFILE: Performance Models and Standards for Bifacial PV Module Technologies

    Broader source: Energy.gov [DOE]

    Bifacial PV modules absorb sunlight and produce electricity from both the front and back sides of the module and can take advantage of light reflected from a surface (albedo). Analysis and field data indicate that this technology has the potential to increase system outputs by 10%-20%. Because current bifacial PV technology has complex light collecting dynamics, its performance advantages have not been fully exploited and no commonly-available tools allow it to be considered for major PV projects beyond current niche applications. The project will provide the data, standard test methods, and validated models to allow developers to fairly evaluate the potential benefits bifacial PV technologies for specific projects.

  11. Pyranometers and Reference Cells: Part 2: What Makes the Most Sense for PV Power Plants?; Preprint

    SciTech Connect (OSTI)

    Meydbray, J.; Riley, E.; Dunn, L.; Emery, K.; Kurtz, S.

    2012-10-01

    As described in Part 1 of this two-part series, thermopile pyranometers and photovoltaic (PV) reference cells can both be used to measure irradiance; however, there are subtle differences between the data that are obtained. This two-part article explores some implications of uncertainty and subtleties of accurately measuring PV efficiency in the field. Part 2 of the series shows how reference cells can be used to more confidently predict PV performance, but how this could best be accomplished if historic irradiance data could be available in PV-technology-specific formats.

  12. Category:Utility Rate Impacts on PV Economics By Building Type...

    Open Energy Info (EERE)

    navigation, search Impact of Utility Rates on PV Economics Full Service Restaurant Hospital Large Hotel Large Office Medium Office Midrise Apartment Outpatient Primary School...

  13. Failure and Degradation Modes of PV Modules in a Hot Dry Climate...

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

    Report Delamination Failures in Long-Term Field Aged PV Modules from Point of View of Encapsulant Accelerated Stress Testing, Qualification Testing, HAST, Field Experience

  14. Defining a Technical Basis for Confidence in PV Investments - A Pathway to Service Life Prediction (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Wohlgemuth, J.; Kempe, M.; Bosco, N.; Hacke, P.; Jordan, D.; Miller, D.

    2013-09-01

    Four levels of accelerated test standards for PV modules are described in the context of how the community can most quickly begin using these.

  15. A Multi-Perspective Approach to PV Module Reliability and Degradation...

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

    Reliability Workshop, February 26 - 27 2013, Golden, Colorado PDF icon pvmrw13ps2bnlcolli.pdf More Documents & Publications Agenda for the PV Module Reliability Workshop, ...

  16. Improved Reliability of PV Modules with Lexan PC Sheet-Front...

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

    ps5sabiczhou.pdf More Documents & Publications Weathering Performance of PV Backsheets Hail Impact Testing on Crystalline Si Modules with Flexible Packaging Test Procedure for UV ...

  17. DOE Zero Energy Ready Home PV-Ready Checklist | Department of Energy

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

    PV-Ready Checklist DOE Zero Energy Ready Home PV-Ready Checklist All homes certified as DOE Zero Energy Ready Homes must meet the mandatory requirements listed in Exhibit 1 of the National Program Requirements, including Requirement 7 Renewable Ready, which requires that homes meet the requirements listed in the PV-Ready Checklist. See the Checklist document for exceptions PDF icon PV-Ready Checklist.pdf More Documents & Publications DOE Zero Energy Ready Home Solar Hot Water-Ready Checklist

  18. Sustainable and Holistic Integration of Energy Storage and Solar PV (SHINES) Funding Opportunity

    Broader source: Energy.gov [DOE]

    The Sustainable and Holistic Integration of Energy Storage and Solar PV (SHINES) solution as envisioned by SunShot will have the following features:

  19. Community Renewable Energy Success Stories Webinar: Developing PV Projects with RFPs and PPAs (text version)

    Broader source: Energy.gov [DOE]

    Below is the text version of the webinar titled "Developing PV Projects with RFPS and PPAS," originally presented on January 15, 2013.

  20. Sandia Energy - PV Value Tool Featured at Washington D.C. Roundtable

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

    by the Federal Housing Administration-Single Family Housing Office of Economic Resilience and the Executive Office of the President on March 11, 2014. The PV Value tool,...

  1. Precursor Report of Data Needs and Recommended Practices for PV Plant Availability Operations and Maintenance Reporting.

    SciTech Connect (OSTI)

    Hill, Roger R.; Klise, Geoffrey Taylor; Balfour, John R.

    2015-01-01

    Characterizing the factors that affect reliability of a photovoltaic (PV) power plant is an important aspect of optimal asset management. This document describes the many factors that affect operation and maintenance (O&M) of a PV plant, identifies the data necessary to quantify those factors, and describes how data might be used by O&M service providers and others in the PV industry. This document lays out data needs from perspectives of reliability, availability, and key performance indicators and is intended to be a precursor for standardizing terminology and data reporting, which will improve data sharing, analysis, and ultimately PV plant performance.

  2. Sandia Research on PV Arc-Fault Detection Submitted for US Patent

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

    Predictive Simulation of Engines Transportation Energy Consortiums Engine Combustion ... The 2011 National Electrical Code requires PV DC series arc-fault protection, but does ...

  3. PV vs. Solar Water Heating- Simple Solar Payback

    Broader source: Energy.gov [DOE]

    Solar energy systems hang their hats on payback. Financial payback is as tangible as money in your bank account, while other types of payback—like environmental externalities—are not usually calculated in dollars. There’s no doubt that photovoltaic (PV) and solar hot water (SHW) systems will pay you back. Maybe not as quickly as you’d like, but all systems will significantly offset their cost over their lifetimes. Here we’ll try to answer: Which system will give the quickest return on investment (ROI)?

  4. Utility Participation in the Rooftop Solar PV Market

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

    Utility Participation in the Rooftop Solar PV Market DG Interconnection Collaborative (DGIC) January 21, 2016 Justin Orkney Program Manager of Distributed Generation Tucson Electric Power (TEP) Marc Romito Manager Arizona Public Service 2 Logistics * Participants are joined in listen-only mode. * Use the Q&A panel to ask questions during the webinar. We will have a few minutes of Q&A between each presentation and group discussion at the very end.  To ask a question: o Click Q&A

  5. Operation of Concentrating Solar Power Plants in the Western Wind and Solar Integration Phase 2 Study

    SciTech Connect (OSTI)

    Denholm, P.; Brinkman, G.; Lew, D.; Hummon, M.

    2014-05-01

    The Western Wind and Solar Integration Study (WWSIS) explores various aspects of the challenges and impacts of integrating large amounts of wind and solar energy into the electric power system of the West. The phase 2 study (WWSIS-2) is one of the first to include dispatchable concentrating solar power (CSP) with thermal energy storage (TES) in multiple scenarios of renewable penetration and mix. As a result, it provides unique insights into CSP plant operation, grid benefits, and how CSP operation and configuration may need to change under scenarios of increased renewable penetration. Examination of the WWSIS-2 results indicates that in all scenarios, CSP plants with TES provides firm system capacity, reducing the net demand and the need for conventional thermal capacity. The plants also reduced demand during periods of short-duration, high ramping requirements that often require use of lower efficiency peaking units. Changes in CSP operation are driven largely by the presence of other solar generation, particularly PV. Use of storage by the CSP plants increases in the higher solar scenarios, with operation of the plant often shifted to later in the day. CSP operation also becomes more variable, including more frequent starts. Finally, CSP output is often very low during the day in scenarios with significant PV, which helps decrease overall renewable curtailment (over-generation). However, the configuration studied is likely not optimal for High Solar Scenario implying further analysis of CSP plant configuration is needed to understand its role in enabling high renewable scenarios in the Western United States.

  6. High Performance Photovoltaic Project: Identifying Critical Paths; Preprint

    SciTech Connect (OSTI)

    Symko-Davies, M.; Zweibel, K.; Benner, J.; Sheldon, P.; Noufi, R.; Kurtz, S.; Coutts, T.; Hulstrom, R.

    2001-10-01

    Presented at the 2001 NCPV Program Review Meeting: Describes recent research accomplishments in in-house and subcontracted work in the High-Performance PV Project.

  7. High PID Resistant Cross-Linked Encapsulnt Based on Polyolefin...

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

    PID Resistant Cross-Linked Encapsulnt Based on Polyolefin SOLAR ASCE High PID Resistant Cross-Linked Encapsulnt Based on Polyolefin SOLAR ASCE Presented at the PV Module ...

  8. Defect Band Luminescence Intensity Reversal as Related to Application of Anti-Reflection Coating on mc-Si PV Cells: Preprint

    SciTech Connect (OSTI)

    Guthrey, H.; Johnston, S.; Yan, F.; Gorman, B.; Al-Jassim, M.

    2012-06-01

    Photoluminescence (PL) imaging is widely used to identify defective regions within mc-Si PV cells. Recent PL imaging investigations of defect band luminescence (DBL) in mc-Si have revealed a perplexing phenomenon. Namely, the reversal of the DBL intensity in various regions of mc-Si PV material upon the application of a SiNx:H anti-reflective coating (ARC). Regions with low DBL intensity before ARC application often exhibit high DBL intensity afterwards, and the converse is also true. PL imaging alone cannot explain this effect. We have used high resolution cathodoluminescence (CL) spectroscopy and electron beam induced current (EBIC) techniques to elucidate the origin of the DBL intensity reversal. Multiple sub-bandgap energy levels were identified that change in peak position and intensity upon the application of the ARC. Using this data, in addition to EBIC contrast information, we provide an explanation for the DBL intensity reversal based on the interaction of the detected energy levels with the SiNx:H ARC application. Multiple investigations have suggested that this is a global problem for mc-Si PV cells. Our results have the potential to provide mc-Si PV producers a pathway to increased efficiencies through defect mitigation strategies.

  9. Future of Grid-Tied PV Business Models: What Will Happen When PV Penetration on the Distribution Grid is Significant? Preprint

    SciTech Connect (OSTI)

    Graham, S.; Katofsky, R.; Frantzis, L.; Sawyer, H.; Margolis, R.

    2008-05-01

    Eventually, distributed PV will become a more significant part of the generation mix. When this happens, it is expected that utilities will have to take on a more active role in the placement, operation and control of these systems. There are operational complexities and concerns of revenue erosion that will drive utilities into greater involvement of distributed PV and will create new business models. This report summarizes work done by Navigant Consulting Inc. for the National Renewable Energy Laboratory as part of the Department of Energy's work on Renewable System Integration. The objective of the work was to better understand the structure of these future business models and the research, development and demonstration (RD&D) required to support their deployment. This report describes potential future PV business models in terms of combinations of utility ownership and control of the PV assets, and the various relationships between end-users and third-party owners.

  10. Solar San Diego: The Impact of Binomial Rate Structures on Real PV Systems; Preprint

    SciTech Connect (OSTI)

    VanGeet, O.; Brown, E.; Blair, T.; McAllister, A.

    2008-05-01

    There is confusion in the marketplace regarding the impact of solar photovoltaics (PV) on the user's actual electricity bill under California Net Energy Metering, particularly with binomial tariffs (those that include both demand and energy charges) and time-of-use (TOU) rate structures. The City of San Diego has extensive real-time electrical metering on most of its buildings and PV systems, with interval data for overall consumption and PV electrical production available for multiple years. This paper uses 2007 PV-system data from two city facilities to illustrate the impacts of binomial rate designs. The analysis will determine the energy and demand savings that the PV systems are achieving relative to the absence of systems. A financial analysis of PV-system performance under various rate structures is presented. The data revealed that actual demand and energy use benefits of binomial tariffs increase in summer months, when solar resources allow for maximized electricity production. In a binomial tariff system, varying on- and semi-peak times can result in approximately $1,100 change in demand charges per month over not having a PV system in place, an approximate 30% cost savings. The PV systems are also shown to have a 30%-50% reduction in facility energy charges in 2007.

  11. Moving to a Higher Level for PV Reliability through Comprehensive Standards Based on Solid Science (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2014-11-01

    PV reliability is a challenging topic because of the desired long life of PV modules, the diversity of use environments and the pressure on companies to rapidly reduce their costs. This presentation describes the challenges, examples of failure mechanisms that we know or don't know how to test for, and how a scientific approach is being used to establish international standards.

  12. PV QA Task Group #2: Thermal and Mechanical Fatigue Including Vibration |

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

    Department of Energy tmf_taskgroup2.pdf More Documents & Publications Linkage to Previous International PV Module QA Task Force Workshops: Proposal for Rating System Agenda for the PV Module Reliability Workshop, February 26 - 27 2013, Golden, Colorado Accelerated Stress Testing, Qualification Testing, HAST, Field Experience

  13. Literature Review of the Effects of UV Exposure on PV Modules

    Broader source: Energy.gov [DOE]

    This PowerPoint presentation, originally presented at the NREL 2013 PV Module Reliability Workshop on Feb. 26-27, 2013 in Denver, CO, presents the literature review of the effects of prolonged UV exposure of PV modules, with a particular emphasis on UV exposure testing using artificial light sources, including fluorescent, Xenon, and metal halide lamps.

  14. A Comparison of Key PV Backsheet and Module Properties from Fielded Module

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

    Exposures and Accelerated Test Conditions | Department of Energy dupont_gambogi.pdf More Documents & Publications Agenda for the PV Module Reliability Workshop, February 26 - 27 2013, Golden, Colorado DuPont's Journey to Build a Global Cellulosic BioFuel Business Enterprise Statistical and Domain Analytics Applied to PV Module Lifetime and Degradation Science

  15. A Multi-Perspective Approach to PV Module Reliability and Degradation |

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

    Department of Energy Presented at the PV Module Reliability Workshop, February 26 - 27 2013, Golden, Colorado PDF icon pvmrw13_ps2_bnl_colli.pdf More Documents & Publications Agenda for the PV Module Reliability Workshop, February 26 - 27 2013, Golden, Colorado DOE-STD-1628-2013 The Long Island Solar Farm

  16. November 18 PSERC Webinar: Quantifying and Mitigating the Impacts of PV in Distribution Systems

    Broader source: Energy.gov [DOE]

    The DOE-funded Power Systems Engineering Research Center (PSERC) is offering a free public webinar presenting a simulation-based investigation of PV impacts on distribution systems and discussing a new approach for volt-VAR optimization with reactive power capabilities of PV inverters.

  17. Lanai high-density irradiance sensor network for characterizing solar

    Office of Scientific and Technical Information (OSTI)

    resource variability of MW-scale PV system. (Conference) | SciTech Connect Conference: Lanai high-density irradiance sensor network for characterizing solar resource variability of MW-scale PV system. Citation Details In-Document Search Title: Lanai high-density irradiance sensor network for characterizing solar resource variability of MW-scale PV system. Sandia National Laboratories (Sandia) and SunPower Corporation (SunPower) have completed design and deployment of an autonomous irradiance

  18. Operational Simulation Tools and Long Term Strategic Planning for High

    Energy Savers [EERE]

    Penetrations of PV in the Southeastern U.S. | Department of Energy Operational Simulation Tools and Long Term Strategic Planning for High Penetrations of PV in the Southeastern U.S. Operational Simulation Tools and Long Term Strategic Planning for High Penetrations of PV in the Southeastern U.S. EPRI logo.jpg In collaboration with the Tennessee Valley Authority Southern Company, the Sacramento Municipal Utility District, the California Independent System Operator, and other partners,

  19. Simplified Method for Modeling the Impact of Arbitrary Partial Shading Conditions on PV Array Performance: Preprint

    SciTech Connect (OSTI)

    MacAlpine, Sara; Deline, Chris

    2015-09-15

    It is often difficult to model the effects of partial shading conditions on PV array performance, as shade losses are nonlinear and depend heavily on a system's particular configuration. This work describes and implements a simple method for modeling shade loss: a database of shade impact results (loss percentages), generated using a validated, detailed simulation tool and encompassing a wide variety of shading scenarios. The database is intended to predict shading losses in crystalline silicon PV arrays and is accessed using basic inputs generally available in any PV simulation tool. Performance predictions using the database are within 1-2% of measured data for several partially shaded PV systems, and within 1% of those predicted by the full, detailed simulation tool on an annual basis. The shade loss database shows potential to considerably improve performance prediction for partially shaded PV systems.

  20. A Best Practice for Developing Availability Guarantee Language in Photovoltaic (PV) O&M Agreements.

    SciTech Connect (OSTI)

    Klise, Geoffrey Taylor; Balfour, John

    2015-11-01

    This document outlines the foundation for developing language that can be utilized in an Equipment Availability Guarantee, typically included in an O&M services agreement between a PV system or plant owner and an O&M services provider, or operator. Many of the current PV O&M service agreement Availability Guarantees are based on contracts used for traditional power generation, which create challenges for owners and operators due to the variable nature of grid-tied photovoltaic generating technologies. This report documents language used in early PV availability guarantees and presents best practices and equations that can be used to more openly communicate how the reliability of the PV system and plant equipment can be expressed in an availability guarantee. This work will improve the bankability of PV systems by providing greater transparency into the equipment reliability state to all parties involved in an O&M services contract.