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


1

Building integrated photovoltaic systems analysis: Preliminary report  

SciTech Connect

The National Renewable Energy Laboratory (NREL) has estimated that the deployment of photovoltaics (PV) in the commercial buildings sector has the potential to contribute as much as 40 gigawatts peak electrical generation capacity and displace up to 1.1 quads of primary fuel use. A significant portion of this potential exists for smaller buildings under 25,000 square feet (2,300 square meters) in size or two stories or less, providing a strong cross over potential for residential applications as well. To begin to achieve this potential, research is needed to define the appropriate match of PV systems to energy end-uses in the commercial building sector. This report presents preliminary findings for a technical assessment of several alternative paths to integrate PV with building energy systems.

Not Available

1993-08-01T23:59:59.000Z

2

Building America System Performance Test Practices: Part 1 -- Photovoltaic Systems  

DOE Green Energy (OSTI)

The report outlines the short-term field testing used by Building America staff and includes a report on the results of an example test of a PV system with battery storage on a home in Tucson, Arizona. This report is not intended as a general recommended test procedure for wide distribution. It is intended to document current practices in Building America to inform program stakeholders and stimulate further discussion. Building America staff intend to apply this procedure until relevant standards for testing PV modules are completed.

Barker, G.; Norton, P.

2003-05-01T23:59:59.000Z

3

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

DOE Green Energy (OSTI)

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

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

2012-12-01T23:59:59.000Z

4

Building-Integrated Photovoltaics (BIPV) in the Residential Sector: An Analysis of Installed Rooftop System Prices  

DOE Green Energy (OSTI)

For more than 30 years, there have been strong efforts to accelerate the deployment of solar-electric systems by developing photovoltaic (PV) products that are fully integrated with building materials. This report examines the status of building-integrated PV (BIPV), with a focus on the cost drivers of residential rooftop systems, and explores key opportunities and challenges in the marketplace.

James, T.; Goodrich, A.; Woodhouse, M.; Margolis, R.; Ong, S.

2011-11-01T23:59:59.000Z

5

Apparatus for mounting photovoltaic power generating systems on buildings  

DOE Patents (OSTI)

Rectangular photovoltaic (PV) modules are mounted on a building roof by mounting stands that are distributed in rows and columns. Each stand comprises a base plate and first and second different height brackets attached to opposite ends of the base plate. Each first and second bracket comprises two module-support members. One end of each module is pivotally attached to and supported by a first module-support member of a first bracket and a second module-support member of another first bracket. At its other end each module rests on but is connected by flexible tethers to module-support members of two different second brackets. The tethers are sized to allow the modules to pivot up away from the module-support members on which they rest to a substantially horizontal position in response to wind uplift forces.

Russell, Miles C. (Lincoln, MA)

2009-08-18T23:59:59.000Z

6

Case Study of Building-Integrated Photovoltaic Systems at University of Wisconsin's Mary Ann Cofrin Hall  

Science Conference Proceedings (OSTI)

This report is a case study of two state-of-the-art building-integrated photovoltaic (BIPV) systems located at Mary Ann Cofrin Hall on the campus of the University of Wisconsin in Green Bay, Wisconsin. With a combined capacity of roughly 18.2 kWac, the two systems produce renewable pollution-free energy, help to support the building's electrical load, and reduce loading on the Wisconsin Public Service (WPS) distribution system serving the campus. The photovoltaic (PV) installation was a joint effort of W...

2003-09-30T23:59:59.000Z

7

Photovoltaic Systems  

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

A photovoltaic (PV), or solar electric system, is made up of several photovoltaic solar cells. An individual PV cell is usually small, typically producing about 1 or 2 watts of power. To boost the...

8

Procedure for Measuring and Reporting the Performance of Photovoltaic Systems in Buildings  

SciTech Connect

This procedure provides a standard method for measuring and characterizing the long-term energy performance of photovoltaic (PV) systems in buildings and the resulting implications to the building's energy use. The performance metrics determined here may be compared against benchmarks for evaluating system performance and verifying that performance targets have been achieved. Uses may include comparison of performance with the design intent; comparison with other PV systems in buildings; economic analysis of PV systems in buildings; and the establishment of long-term performance records that enable maintenance staff to monitor trends in energy performance.

Pless, S.; Deru, M.; Torcellini, P.; Hayter, S.

2005-10-01T23:59:59.000Z

9

Procedure for Measuring and Reporting the Performance of Photovoltaic Systems in Buildings  

DOE Green Energy (OSTI)

This procedure provides a standard method for measuring and characterizing the long-term energy performance of photovoltaic (PV) systems in buildings and the resulting implications to the building's energy use. The performance metrics determined here may be compared against benchmarks for evaluating system performance and verifying that performance targets have been achieved. Uses may include comparison of performance with the design intent; comparison with other PV systems in buildings; economic analysis of PV systems in buildings; and the establishment of long-term performance records that enable maintenance staff to monitor trends in energy performance.

Pless, S.; Deru, M.; Torcellini, P.; Hayter, S.

2005-10-01T23:59:59.000Z

10

Integrating Solar Thermal and Photovoltaic Systems in Whole Building Energy Simulation  

E-Print Network (OSTI)

This paper introduces methodologies on how the renewable energy generated by the solar thermal and solar photovoltaic (PV) systems installed on site can be integrated in the whole building simulation analyses, which then can be available to analyze the energy impact of solar systems installed in commercial buildings. A large prototypical office building (124,000 ft2) was used in simulation modeling. The DOE-2.1e program was used for whole building simulation, F-Chart (Beckman et al., 1977) for solar thermal systems analysis, and PV F-Chart (Klein and Beckman, 1983) for solar PV systems analysis.

Cho, S.; Haberl, J.

2010-08-01T23:59:59.000Z

11

Alternating Current Photovoltaic Building Block  

This technology provides a fully integrated and self-containing alternating current (AC) photovoltaic (PV) Building Block device and method that allows photovoltaic applications to become true plug-and-play devices. The Building Block combines, ...

12

Building America Best Practices Series, Volume 6: High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems  

SciTech Connect

This guide is was written by PNNL for the US Department of Energy's Building America program to provide information for residential production builders interested in building near zero energy homes. The guide provides indepth descriptions of various roof-top photovoltaic power generating systems for homes. The guide also provides extensive information on various designs of solar thermal water heating systems for homes. The guide also provides construction company owners and managers with an understanding of how solar technologies can be added to their homes in a way that is cost effective, practical, and marketable. Twelve case studies provide examples of production builders across the United States who are building energy-efficient homes with photovoltaic or solar water heating systems.

Baechler, Michael C.; Gilbride, Theresa L.; Ruiz, Kathleen A.; Steward, Heidi E.; Love, Pat M.

2007-06-04T23:59:59.000Z

13

Building America Best Practices Series, Volume 6: High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems  

SciTech Connect

This guide is was written by PNNL for the US Department of Energy's Building America program to provide information for residential production builders interested in building near zero energy homes. The guide provides indepth descriptions of various roof-top photovoltaic power generating systems for homes. The guide also provides extensive information on various designs of solar thermal water heating systems for homes. The guide also provides construction company owners and managers with an understanding of how solar technologies can be added to their homes in a way that is cost effective, practical, and marketable. Twelve case studies provide examples of production builders across the United States who are building energy-efficient homes with photovoltaic or solar water heating systems.

Baechler, Michael C.; Gilbride, Theresa L.; Ruiz, Kathleen A.; Steward, Heidi E.; Love, Pat M.

2007-06-04T23:59:59.000Z

14

Low Cost Thin Film Building-Integrated Photovoltaic Systems  

DOE Green Energy (OSTI)

The goal of the program is to develop 'LOW COST THIN FILM BUILDING-INTEGRATED PV SYSTEMS'. Major focus was on developing low cost solution for the commercial BIPV and rooftop PV market and meet DOE LCOE goal for the commercial market segment of 9-12 cents/kWh for 2010 and 6-8 cents/kWh for 2015. We achieved the 2010 goal and were on track to achieve the 2015 goal. The program consists of five major tasks: (1) modules; (2) inverters and BOS; (3) systems engineering and integration; (4) deployment; and (5) project management and TPP collaborative activities. We successfully crossed all stage gates and surpassed all milestones. We proudly achieved world record stable efficiencies in small area cells (12.56% for 1cm2) and large area encapsulated modules (11.3% for 800 cm2) using a triple-junction amorphous silicon/nanocrystalline silicon/nanocrystalline silicon structure, confirmed by the National Renewable Energy Laboratory. We collaborated with two inverter companies, Solectria and PV Powered, and significantly reduced inverter cost. We collaborated with three universities (Syracuse University, University of Oregon, and Colorado School of Mines) and National Renewable Energy Laboratory, and improved understanding on nanocrystalline material properties and light trapping techniques. We jointly published 50 technical papers in peer-reviewed journals and International Conference Proceedings. We installed two 75kW roof-top systems, one in Florida and another in New Jersey demonstrating innovative designs. The systems performed satisfactorily meeting/exceeding estimated kWh/kW performance. The 50/50 cost shared program was a great success and received excellent comments from DOE Manager and Technical Monitor in the Final Review.

Dr. Subhendu Guha; Dr. Jeff Yang

2012-05-25T23:59:59.000Z

15

Energy analysis of facade-integrated photovoltaic systems applied to UAE commercial buildings  

SciTech Connect

Developments in the design and manufacture of photovoltaic cells have recently been a growing concern in the UAE. At present, the embodied energy pay-back time (EPBT) is the criterion used for comparing the viability of such technology against other forms. However, the impact of PV technology on the thermal performance of buildings is not considered at the time of EPBT estimation. If additional energy savings gained over the PV system life are also included, the total EPBT could be shorter. This paper explores the variation of the total energy of building integrated photovoltaic systems (BiPV) as a wall cladding system applied to the UAE commercial sector and shows that the ratio between PV output and saving in energy due to PV panels is within the range of 1:3-1:4. The result indicates that for the southern and western facades in the UAE, the embodied energy pay-back time for photovoltaic system is within the range of 12-13 years. When reductions in operational energy are considered, the pay-back time is reduced to 3.0-3.2 years. This study comes to the conclusion that the reduction in operational energy due to PV panels represents an important factor in the estimation of EPBT. (author)

Radhi, Hassan [Architectural Engineering Department, UAE University, Al-ain (United Arab Emirates)

2010-12-15T23:59:59.000Z

16

Visualisation of photovoltaic clad buildings  

Science Conference Proceedings (OSTI)

Architectural composition in the electronic design studio: conceptual design using CAD visualisation and virtual reality modelling - Dobson, A. Comput. Aided Archit. Design Unit, Luton Univ., UKThe paper describes a study carried out to investigate the ... Keywords: PV integrated buildings, aesthetic implications, architectural CAD, building material, computer aided design software, computer visualisationIEEE Conference on Information Visualisation (IV '97), facade architecture, photovoltaic cells, photovoltaic clad buildings, refurbished buildings, visualisation

M. Horne; R. Hill; C. Underwood

1997-08-01T23:59:59.000Z

17

Alternating Current Photovoltaic Building Block - Energy ...  

This technology provides a fully integrated and self-containing alternating current (AC) photovoltaic (PV) Building Block device and method that allows photovoltaic ...

18

Methodology for Estimating Solar Potential on Multiple Building Rooftops for Photovoltaic Systems  

SciTech Connect

In this paper, a methodology for estimating solar potential on multiple building rooftops is presented. The objective of this methodology is to estimate the daily or monthly solar radiation potential on individual buildings in a city/region using Light Detection and Ranging (LiDAR) data and a geographic information system (GIS) approach. Conceptually, the methodology is based on the upward-looking hemispherical viewshed algorithm, but applied using an area-based modeling approach. The methodology considers input parameters, such as surface orientation, shadowing effect, elevation, and atmospheric conditions, that influence solar intensity on the earth s surface. The methodology has been implemented for some 212,000 buildings in Knox County, Tennessee, USA. Based on the results obtained, the methodology seems to be adequate for estimating solar radiation on multiple building rooftops. The use of LiDAR data improves the radiation potential estimates in terms of the model predictive error and the spatial pattern of the model outputs. This methodology could help cities/regions interested in sustainable projects to quickly identify buildings with higher potentials for roof-mounted photovoltaic systems.

Kodysh, Jeffrey B [ORNL; Omitaomu, Olufemi A [ORNL; Bhaduri, Budhendra L [ORNL; Neish, Bradley S [ORNL

2013-01-01T23:59:59.000Z

19

DOI: 10.5772/10347 Chapter Number Thermal performance of photovoltaic systems integrated in buildings  

E-Print Network (OSTI)

1.1 History of photovoltaic systems … Photovoltaics is one of the leading chains of "sustainable development". Indeed, when one observes the development programs of energy systems in the countries or nations that move towards sustainable development, we find that the solar (and through it the production of

D. Bigot; F. Miranville; F. Ali Hamada; I. Ingar; S. Guichard; H. Boyer

2012-01-01T23:59:59.000Z

20

Technical and Energy Assessment of Building Integrated Photovoltaic Systems applied to the UAE Office Buildings  

E-Print Network (OSTI)

In the market, the embodied energy payback time (EPBT) is the scale to measure and compare the viability of PV systems against other technologies. Although the impact of PV panels on the operational energy is significant, it is not considered at the time of EPBT estimation. Including savings in operational energy gained over the PV system life leads to shortening the total EPBT. This study shows that the ratio between PV outputs and savings in energy due to PV panels is about 1:3. For the southern and western PV facades of the UAE office buildings, the embodied energy payback time is 12-13 years. When reductions in operational energy are considered the payback time can be reduced to 3 years. It is obvious that the reduction in the operational energy due to the PV panels represents an important factor when the EPBT is estimated.

Radhi, H.

2010-01-01T23:59:59.000Z

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


21

Building-integrated photovoltaics  

SciTech Connect

This is a study of the issues and opportunities for building-integrated PV products, seen primarily from the perspective of the design community. Although some quantitative analysis is included, and limited interviews are used, the essence of the study is qualitative and subjective. It is intended as an aid to policy makers and members of the technical community in planning and setting priorities for further study and product development. It is important to remember that the success of a product in the building market is not only dependent upon its economic value; the diverse group of building owners, managers, regulators, designers, tenants and users must also find it practical, aesthetically appealing and safe. The report is divided into 11 sections. A discussion of technical and planning considerations is followed by illustrative diagrams of different wall and roof assemblies representing a range of possible PV-integration schemes. Following the diagrams, several of these assemblies are then applied to a conceptual test building which is analyzed for PV performance. Finally, a discussion of mechanical/electrical building products incorporating PVs is followed by a brief surveys of cost issues, market potential and code implications. The scope of this report is such that most of the discussion does not go beyond stating the questions. A more detailed analysis will be necessary to establish the true costs and benefits PVs may provide to buildings, taking into account PV power revenue, construction costs, and hidden costs and benefits to building utility and marketability.

1993-01-01T23:59:59.000Z

22

High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems; Volume 6 Building America Best Practices Series  

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

by by Pacific Northwest National Laboratory & Oak Ridge National Laboratory June 4, 2007 June 2007 * NREL/TP-550-41085 PNNL-16362 High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems Building America Best Practices Series Volume 6 High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems Building America Best Practices Series Prepared by Pacific Northwest National Laboratory, a DOE national laboratory Michael C. Baechler Theresa Gilbride, Kathi Ruiz, Heidi Steward and Oak Ridge National Laboratory, a DOE national laboratory Pat M. Love June 4, 2007 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor Battelle Memorial Institute, nor any of their employees, makes any warranty,

23

EELE408 Photovoltaics Lecture 20: Photovoltaic Systems  

E-Print Network (OSTI)

into the grid 2 Application Areas 3 Photovoltaic System Basics · Photovoltaic Systems ­ Cell Panel Array1 EELE408 Photovoltaics Lecture 20: Photovoltaic Systems Dr. Todd J. Kaiser tjkaiser Panel 4 · DC · AC / = ACDC Charge Regulator Inverter Battery DC Load AC Load Modularity: Solar Cell

Kaiser, Todd J.

24

Optimal building-integrated photovoltaic applications  

DOE Green Energy (OSTI)

Photovoltaic (solar electric) modules are clean, safe and efficient devices that have long been considered a logical material for use in buildings. Recent technological advances have made PVs suitable for direct integration into building construction. PV module size, cost, appearance and reliability have advanced to the point where they can function within the architectural parameters of conventional building materials. A building essentially provides free land and structural support for a PV module, and the module in turn displaces standard building components. This report identifies the highest-value applications for PVs in buildings. These systems should be the first markets for BIPV products in the commercial buildings, and should remain an important high-end market for the foreseeable future.

Kiss, G.; Kinkead, J. [Kiss and Co. Architects, New York, NY (United States)

1995-11-01T23:59:59.000Z

25

PHOTOVOLTAIC SOLAR ELECTRIC SYSTEM  

E-Print Network (OSTI)

CALIFORNIA ENERGY COMMISSION Buying a PHOTOVOLTAIC SOLAR ELECTRIC SYSTEM A Consumer Guide 2003 System: A Consumer Guide i Buying a Photovoltaic Solar Electric System A Consumer Guide California Energy water system that uses the sun's energy to heat water, solar electric or photovoltaic technology uses

Krothapalli, Anjaneyulu

26

Energy Basics: Photovoltaic Systems  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Solar Photovoltaics Cells Systems Concentrating Solar...

27

Development of a Design Tool for Building Integrated Photovoltaics  

Science Conference Proceedings (OSTI)

Abstract: This paper outlines the design objectives, approach and results of the development of a building integrated photovoltaic (BIPV) system visualisation prototype design tool which was coded in Visual Basic for Applications. It provides the designer ...

2001-07-01T23:59:59.000Z

28

Building-integrated photovoltaics: A case study  

SciTech Connect

In 1992, Kiss Cathcart Anders Architects performed a study for NREL on Building-Integrated Photovoltaics (BIPV) issues as seen from the perspective of the building community. In general, the purpose of the study was to list major issues and potential applications; by it`s nature it asked more questions than it answered. This second phase study was to produce quantitative data on the performance of specific BIPV systems. Only roof systems are evaluated. The energy performance, construction cost and simple payback for five different BIPV roof options are evaluated in six different locations: Oakland, New York, Miami, Phoenix, Chicago, and Cincinnati. The roof options evaluated include the following: single-glazed PV roof using glass-substrate PVs; double-glazed PV roof with insulating PV modules; ballasted roof-mounted system; sawtooth light monitor roof with indirect north daylighting; sawtooth roof with north light and active heat recovery.

Kiss, G.; Kinkead, J.; Raman, M.

1995-03-01T23:59:59.000Z

29

Concentrator Photovoltaic Systems  

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

Concentrator photovoltaic (PV) systems use less solar cell material than other PV systems. PV cells are the most expensive components of a PV system, on a per-area basis. A concentrator makes use...

30

Photovoltaics for Buildings: Case Studies of High-Performance Buildings with PV  

SciTech Connect

Energy efficiency maximizes the value of photovoltaics (PV) in buildings systems. A fixed-sizre PV system will offset a much larger part of the electrical load in an energy-efficient building than in a building whose energy design has not been optimized.

Hayter, S. J.; Torcellini, P. A.

2000-01-01T23:59:59.000Z

31

Photovoltaic systems and applications  

DOE Green Energy (OSTI)

Abstracts are given of presentations given at a project review meeting held at Albuquerque, NM. The proceedings cover the past accomplishments and current activities of the Photovoltaic Systems Research, Balance-of-System Technology Development and System Application Experiments Projects at Sandia National Laboratories. The status of intermediate system application experiments and residential system analysis is emphasized. Some discussion of the future of the Photovoltaic Program in general, and the Sandia projects in particular is also presented.

Not Available

1982-01-01T23:59:59.000Z

32

Photovoltaic System Performance  

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

Photovoltaic (PV) systems are usually composed of numerous solar arrays, which in turn, are composed of numerous PV cells. The performance of the system is therefore dependent on the performance of...

33

Photovoltaics for Buildings: Key Issues in Pursuit of Market Readiness  

SciTech Connect

The photovoltaic (PV) industry is rapidly beginning to recognize the market potential of the buildings sector. New PV-for-buildings products have recently become commercially available, and numerous products that are under development will be introduced within the next 5 years. To ensure that these new products will be adopted and used in common building practices, the PV industry should recognize and address important buildings industry issues. These issues include building codes and standards, after-market servicing, education, and warranties and insurance policies. Photovoltaic systems are also still very expensive. The simplest method for increasing their value for a building is to decrease the building's electrical loads through energy efficiency and conservation. Meeting these goals can only be accomplished through partnerships with the U.S. Department of Energy (DOE), private industry, and public institutions.

Hayter, S. J.

1998-10-31T23:59:59.000Z

34

Photovoltaics for Buildings: Key Issues in Pursuit of Market Readiness  

DOE Green Energy (OSTI)

The photovoltaic (PV) industry is rapidly beginning to recognize the market potential of the buildings sector. New PV-for-buildings products have recently become commercially available, and numerous products that are under development will be introduced within the next 5 years. To ensure that these new products will be adopted and used in common building practices, the PV industry should recognize and address important buildings industry issues. These issues include building codes and standards, after-market servicing, education, and warranties and insurance policies. Photovoltaic systems are also still very expensive. The simplest method for increasing their value for a building is to decrease the building's electrical loads through energy efficiency and conservation. Meeting these goals can only be accomplished through partnerships with the U.S. Department of Energy (DOE), private industry, and public institutions.

Hayter, S. J.

1998-10-31T23:59:59.000Z

35

Solar radiation and daylight illuminance modelling and implications for building integrated photovoltaic system designs.  

E-Print Network (OSTI)

???Recently, there has been an increasing awareness of building energy conservation. Renewable energy can produce energy without emitting pollutant and requires no fuel. Energy-efficient building… (more)

Lam, Ngan Tung Tony (???)

2008-01-01T23:59:59.000Z

36

Photovoltaic system in system LABI  

Science Conference Proceedings (OSTI)

There is prepared a new model marked as DE10 to extens the system LABI. It is a photovoltaic system. Utilizing of model is into the field of university studying and as a pilot test system for all extern experts. A special parts of model are measurement ... Keywords: automation, measurement, photovoltaic system, sun energy

Hruska Frantisek

2010-07-01T23:59:59.000Z

37

Concentrator Photovoltaic Systems | Department of Energy  

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

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

38

Sociotechnical complexities associated with the development of Building Integrated Photovoltaic fac?ade systems  

E-Print Network (OSTI)

Significant opportunities to improve the energy use in buildings open remarkable possibilities for innovation over the next two decades. Particularly in the United States, 41% of primary energy consumption in 2010 went ...

Moreno, Jorge (Jorge Alejandro Moreno de la Carrera)

2013-01-01T23:59:59.000Z

39

Expedited Permitting Process for Solar Photovoltaic Systems ...  

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

Expedited Permitting Process for Solar Photovoltaic Systems (Vermont) Expedited Permitting Process for Solar Photovoltaic Systems (Vermont) Eligibility Agricultural Commercial...

40

Energy Basics: Concentrator Photovoltaic Systems  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Solar Photovoltaics Cells Systems Concentrating Solar...

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


41

Energy Basics: Photovoltaic System Performance  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Solar Photovoltaics Cells Systems Concentrating Solar...

42

Apparatus and method for mounting photovoltaic power generating systems on buildings  

DOE Patents (OSTI)

Rectangular PV modules (6) are mounted on a building roof (4) by mounting stands that are distributed in rows and columns. Each stand comprises a base plate (10) that rests on the building roof (4) and first and second brackets (12, 14) of different height attached to opposite ends of the base plate (10). Each bracket (12, 14) has dual members for supporting two different PV modules (6), and each PV module (6) has a mounting pin (84) adjacent to each of its four corners. Each module (6) is supported by attachment of two of its mounting pins (84) to different first brackets (12), whereby the modules (6) and their supporting stands are able to resist uplift forces resulting from high velocity winds without the base plates (10) being physically attached to the supporting roof structure (4). Preferably the second brackets (14) have a telescoping construction that permits their effective height to vary from less than to substantially the same as that of the first brackets (12).

Russell, Miles Clayton (Lincoln, MA)

2008-10-14T23:59:59.000Z

43

Building Energy Software Tools Directory: Photovoltaics Economics  

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

Photovoltaics Economics Calculator Photovoltaics Economics Calculator Web-based tool which allows you to describe your solar system in detail and provides a detailed breakdown of what sort of power you'll get out of it and how economical of a investment the system will be. It uses the TMY2 solar data from the NREL Renewable Resource Data Center. This calculator allows users to customize their setup, providing greater feedback on how much power is provided when, and most importantly, a detailed economics breakdown of how the investment works out. It also keeps track of battery charge states for off-grid users. Screen Shots Keywords solar, photovoltaic, economics Validation/Testing Validated against PVWatts, a widely recognized solar power output calculator. When given the exact same conditions, power production is

44

Photovoltaic system reliability  

SciTech Connect

This paper discusses the reliability of several photovoltaic projects including SMUD`s PV Pioneer project, various projects monitored by Ascension Technology, and the Colorado Parks project. System times-to-failure range from 1 to 16 years, and maintenance costs range from 1 to 16 cents per kilowatt-hour. Factors contributing to the reliability of these systems are discussed, and practices are recommended that can be applied to future projects. This paper also discusses the methodology used to collect and analyze PV system reliability data.

Maish, A.B.; Atcitty, C. [Sandia National Labs., NM (United States); Greenberg, D. [Ascension Technology, Inc., Lincoln Center, MA (United States)] [and others

1997-10-01T23:59:59.000Z

45

Hybrid photovoltaic/thermal solar energy system  

DOE Green Energy (OSTI)

Heating and cooling systems that use hybrid solar energy collectors (combination photovoltaic-thermal) have the potential for considerable energy savings, particularly when the system includes a heat pump. Economic evaluations show that photovoltaic systems are potentially most economical, but results depend critically on future collector costs as well as energy prices. Results are based on a specially developed computer program that predicted the total auxiliary energy required for five different solar heating/cooling systems. Performance calculations for a modeled residence and small office building were made using meteorological data from four geographic locations. Annual system costs were also calculated.

Kern, E.C. Jr.; Russell, M.C.

1978-03-27T23:59:59.000Z

46

Southwest Photovoltaic Systems Inc | Open Energy Information  

Open Energy Info (EERE)

Southwest Photovoltaic Systems Inc Jump to: navigation, search Name Southwest Photovoltaic Systems Inc Place Tomball, Texas Zip 77375 Product Distributor of small scale PV systems...

47

Aternating current photovoltaic building block - Energy ...  

A modular apparatus for and method of alternating current photovoltaic power generation comprising via a photovoltaic module, generating power in the form of direct ...

48

Photovoltaic Installation on a Commercial Building (Bishop Museum) -- Design and Installation  

Science Conference Proceedings (OSTI)

This report, the first of two deliverable reports provided to the Electric Power Research Institute (EPRI) under Research and Development (R&D) Agreement No. EP-P7353/C3739 (Building Integrated Photovoltaic Commercial Building Project), provides information on the design and installation of a photovoltaic (PV) system installed at the State Museum of Natural and Cultural History (Bishop Museum) located in Honolulu, Hawaii. Details on structural specifications, PV system design and specifications, and less...

2004-02-13T23:59:59.000Z

49

205 kW Photovoltaic (PV) System Installed on the U.S. Department...  

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

205 kW Photovoltaic (PV) System Installed on the U.S. Department of Energy's Forrestal Building 205 kW Photovoltaic (PV) System Installed on the U.S. Department of Energy's...

50

Photovoltaic module mounting system  

SciTech Connect

A solar array mounting system having unique installation, load distribution, and grounding features, and which is adaptable for mounting solar panels having no external frame. The solar array mounting system includes flexible, pedestal-style feet and structural links connected in a grid formation on the mounting surface. The photovoltaic modules are secured in place via the use of attachment clamps that grip the edge of the typically glass substrate. The panel mounting clamps are then held in place by tilt brackets and/or mid-link brackets that provide fixation for the clamps and align the solar panels at a tilt to the horizontal mounting surface. The tilt brackets are held in place atop the flexible feet and connected link members thus creating a complete mounting structure.

Miros, Robert H. J. (Fairfax, CA); Mittan, Margaret Birmingham (Oakland, CA); Seery, Martin N. (San Rafael, CA); Holland, Rodney H. (Novato, CA)

2012-04-17T23:59:59.000Z

51

Photovoltaic module mounting system  

SciTech Connect

A solar array mounting system having unique installation, load distribution, and grounding features, and which is adaptable for mounting solar panels having no external frame. The solar array mounting system includes flexible, pedestal-style feet and structural links connected in a grid formation on the mounting surface. The photovoltaic modules are secured in place via the use of attachment clamps that grip the edge of the typically glass substrate. The panel mounting clamps are then held in place by tilt brackets and/or mid-link brackets that provide fixation for the clamps and align the solar panels at a tilt to the horizontal mounting surface. The tilt brackets are held in place atop the flexible feet and connected link members thus creating a complete mounting structure.

Miros, Robert H. J.; Mittan, Margaret Birmingham; Seery, Martin N; Holland, Rodney H

2012-09-18T23:59:59.000Z

52

Solar photovoltaic panels tracking system  

Science Conference Proceedings (OSTI)

This research project concentrates on the design and control of a two-degrees-of-freedom orientation system for the photovoltaic solar panels in sunny regions which are considered very rich in solar energy. A brief background on the sun path and behavior ... Keywords: altitude, azimuth, closed-loop control, open-loop control, orientation, sensor, solar photovoltaic panels, solar tracking

Ahmed Abu Hanieh

2010-05-01T23:59:59.000Z

53

Analysis of the Benefits of Photovoltaic in High Rise Commercial Buildings  

E-Print Network (OSTI)

Energy efficient glazing is necessary to reduce heat gains or losses that contribute to the high-energy use of buildings. However, high-rise commercial buildings that use energy efficient glazing are still consumptive. To reduce their energy use further, recent studies have integrated photovoltaic glazed window systems into the building shell. To understand the relationship between photovoltaic windows, energy use and human satisfaction, this paper presents a study of the effects of photovoltaic glazed windows on the energy use of large commercial buildings and includes an assessment of the overall human satisfaction of the workers within photovoltaic glazed office spaces. A prototypical building was used to develop the base case simulations for the DOE-2 energy simulation program and the PV F-Chart photovoltaic analysis program. By substituting the appropriate variables in the base case simulation for each site, the building was simulated to evaluate the impact of the PV glazing on the building's heat loss/gain as well as the amount of electricity that could be expected from the PV. To test for human satisfaction, a survey was performed to assess the overall preference of the subjects to the office spaces using the photovoltaic glazed windows. Finally, an overall assessment of the economic and non-economic impacts is also discussed.

Sylvester, K. E.; Haberl, J. S.

2000-01-01T23:59:59.000Z

54

The solar cube: A building-integrated photovoltaic incubator  

SciTech Connect

A huge tipped glass tube provides instruction to visitors to the Discovery Science Center in Los Angeles, and an educational diversion to commuters on Interstate 5. The project revealed that photovoltaic industry has a lot to learn from those in the construction industry about building-integrated photovoltaics. The industry must develop products pleasing to the architect and the architect's client, and easily adaptable to the rest of the building. This market requires PV manufacturers to look at photovoltaics as a building material that just so happens to produce electricity, too. Hence, price per square rules in this application over cost per watt. Most importantly, of course, demonstrating as pioneers the potential of building-integrated photovoltaics has delighted the client, The Science Discovery Center.

Perlin, J.

2000-06-01T23:59:59.000Z

55

Photovoltaics: New opportunities for utilities  

SciTech Connect

This publication presents information on photovoltaics. The following topics are discussed: Residential Photovoltaics: The New England Experience Builds Confidence in PV; Austin's 300-kW Photovoltaic Power Station: Evaluating the Breakeven Costs; Residential Photovoltaics: The Lessons Learned; Photovoltaics for Electric Utility Use; Least-Cost Planning: The Environmental Link; Photovoltaics in the Distribution System; Photovoltaic Systems for the Rural Consumer; The Issues of Utility-Intertied Photovoltaics; and Photovoltaics for Large-Scale Use: Costs Ready to Drop Again.

Not Available

1991-07-01T23:59:59.000Z

56

Photovoltaic System Performance Basics | Department of Energy  

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

System Performance Basics System Performance Basics Photovoltaic System Performance Basics August 20, 2013 - 4:17pm Addthis Photovoltaic (PV) systems are usually composed of numerous solar arrays, which in turn, are composed of numerous PV cells. The performance of the system is therefore dependent on the performance of its components. Reliability The reliability of PV arrays is an important factor in the cost of PV systems and in consumer acceptance. However, the building blocks of arrays, PV cells, are considered "solid-state" devices with no moving parts and, therefore, are highly reliable and long-lived. Therefore, reliability measurements of PV systems are usually focused not on cells but on modules and whole systems. Reliability can be improved through fault-tolerant circuit design, which

57

Building Integrated Photovoltaics (BIPV) in the Residential Sector...  

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

For more than 30 years, there have been strong efforts to accelerate the deployment of solar- electric systems by developing photovoltaic (PV) products that are fully integrated...

58

A pilot study of the building integrated photovoltaic thermal (BIPVT) collector for commercial applications in Malaysia  

Science Conference Proceedings (OSTI)

Building integrated photovoltaic thermal solar collector (BIPVT) has been designed to produce both electricity and hot water and later integrated to building. The hot water is produced at the useful temperatures for the applications in Malaysia such ... Keywords: BIPVT collector, hot water heating system, thermal and electrical efficiency

A. Ibrahim; M. Y. Othman; M. H. Ruslan; S. Mat; A. Zaharim; K. Sopian

2011-07-01T23:59:59.000Z

59

205 kW Photovoltaic (PV) System Installed on the U.S. Department of Energy's Forrestal Building  

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

Project Description Project Description The Energy Policy Act of 2005 (EPAct 2005), the Energy Independence and Security Act of 2007 (EISA 2007), and Presidential Executive Order 13423 all contain requirements for Federal facilities to decrease energy consumption and increase the use of renewable energy by the year 2015. To provide leadership in meeting these requirements, DOE, in partnership with the General Services Administration (GSA), has installed a rooftop solar electric, or PV, system on the roof of DOE's headquarters in Washington, D.C. The 205 kilowatt (kW) installation is one of the largest of its kind in the Nation's capital. A display in the For- restal building will show the power output of the PV system during the day and the energy produced over

60

Mandatory Photovoltaic System Cost Analysis | Department of Energy  

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

Mandatory Photovoltaic System Cost Analysis Mandatory Photovoltaic System Cost Analysis Eligibility Utility Savings For Solar Buying & Making Electricity Program Information...

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


61

Energy Basics: Flat-Plate Photovoltaic Systems  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Solar Photovoltaics Cells Systems Concentrating Solar...

62

Building integrated photovoltaic (BIPV) roofs for sustainability and energy  

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

integrated photovoltaic (BIPV) roofs for sustainability and energy integrated photovoltaic (BIPV) roofs for sustainability and energy efficiency Title Building integrated photovoltaic (BIPV) roofs for sustainability and energy efficiency Publication Type Report Year of Publication 2013 Authors Ly, Peter, George Ban-Weiss, Nathan Finch, Craig Wray, Mark de Ogburn, William W. Delp, Hashem Akbari, Scott Smaby, Ronnen Levinson, and Bret Gean Corporate Authors SEI Group Inc. Document Number ESTCP EW-200813 Pagination 156 pp. Date Published 09/2013 Publisher Naval Facilities Engineering Command - Engineering and Expeditionary Warfare Center Type Technical Report Report Number TR-NAVFAC-EXWC-PW-1303 Keywords Buildings Energy Efficiency, energy efficiency, Energy Usage, renewable energy, Renewable Energy: Policy & Programs Abstract

63

Photovoltaic Geographical Information System | Open Energy Information  

Open Energy Info (EERE)

Photovoltaic Geographical Information System Photovoltaic Geographical Information System Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Photovoltaic Geographical Information System Focus Area: Renewable Energy Topics: Opportunity Assessment & Screening Website: re.jrc.ec.europa.eu/pvgis/ Equivalent URI: cleanenergysolutions.org/content/photovoltaic-geographical-information Language: English Policies: Deployment Programs DeploymentPrograms: Demonstration & Implementation This tool provides a geographical inventory of solar energy resources and an assessment of the electricity generation from photovoltaic systems in Europe, Africa, and southwest Asia. The tools allows for analysis of the technical, environmental, and socio-economic factors of solar electricity generation. Users may access maps and posters generated using the tool, as

64

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

DOE Green Energy (OSTI)

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.

NONE

1998-12-31T23:59:59.000Z

65

Subsystem engineering and development of grid-connected photovoltaic systems  

DOE Green Energy (OSTI)

The experience gained in fielding residential and intermediate sized photovoltaic application experiments is summarized. This experience is used to guide the engineering and development of array and power conditioning subsystems for grid-connected photovoltaic systems. A major consideration in this development effort is cost. Through innovative engineering, using a modular building block approach for the array subsystem, it is now possible to construct array fields, in moderate quantities, for about $52/m/sup 2/ excluding the photovoltaic modules. Similarly, results of power conditioning subsystem development indicate a projected cost of about $0.25/W/sub p/ for advanced units with conversion efficiencies in excess of 90%.

Burgess, E.L.; Post, H.N.; Key, T.S.

1982-01-01T23:59:59.000Z

66

System tests and applications photovoltaic program  

DOE Green Energy (OSTI)

A summary of all the photovoltaic system tests and application experiments that have been initiated since the start of the US DOE Photovoltaics Program in 1975 is presented. They are organized in the following manner for ease of reference: (1) application experiments: these are independently designed and constructed projects which are funded by DOE; (2) system field tests: projects designed and monitored by the national laboratories involved in the photovoltaic program; (3) exhibits: designed to acquaint the general public to photovoltaics; (4) component field tests: real time endurance testing conducted to monitor module reliability under actual environmental conditions; and (5) test facilities: descriptions of the four national laboratories involved in the photovoltaic program.

Not Available

1979-05-01T23:59:59.000Z

67

Photovoltaic systems and applications perspective  

DOE Green Energy (OSTI)

The National Photovoltaic Program is currently in the process of increasing emphasis on full-scale system experiments in the potential user environment, a natural coccurrence in the evolution of system design and development. At this point large amounts of design information are available and need to be brought together in usable form to support this effort. The state of understanding in the system definition area for the major applications is reviewed, and the remaining issues, especially as they impact the field test activities, are indicated.

Jones, G.J.

1980-01-01T23:59:59.000Z

68

Energy Basics: Photovoltaic Systems  

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

an entire PV system. This system is usually everything needed to meet a particular energy demand, such as powering a water pump, the appliances and lights in a home, or-if the...

69

Flat-Plate Photovoltaic Balance of System | Department of Energy  

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

Balance of System Flat-Plate Photovoltaic Balance of System August 20, 2013 - 4:29pm Addthis Complete photovoltaic (PV) energy systems are composed of three subsystems....

70

Photovoltaic lighting system performance  

DOE Green Energy (OSTI)

The performance of 21 PV-powered low pressure sodium lighting systems on a multi-use has been documented in this paper. Specific areas for evaluation include the vandal resistant PV modules, constant voltage and on/off PV charge controllers, flooded deep-cycle lead-antimony and valve regulated lead-acid (VLRA) gel batteries, and low pressure sodium ballasts and lights. The PV lighting system maintenance intervals and lessons learned have been documented over the past 2.5 years. The above performance data has shown that with careful hardware selection, installation, and maintenance intervals the PV lighting systems will operate reliably.

Harrington, S.R.; Hund, T.D.

1996-06-01T23:59:59.000Z

71

A prototype photovoltaic/thermal system integrated with transpired collector  

SciTech Connect

Building-integrated photovoltaic/thermal (BIPV/T) systems may be utilized to produce useful heat while simultaneously generating electricity from the same building envelope surface. A well known highly efficient collector is the open-loop unglazed transpired collector (UTC) which consists of dark porous cladding through which outdoor air is drawn and heated by absorbed solar radiation. Commercially available photovoltaic systems typically produce electricity with efficiencies up to about 18%. Thus, it is beneficial to obtain much of the normally wasted heat from the systems, possibly by combining UTC with photovoltaics. Combination of BIPV/T and UTC systems for building facades is considered in this paper - specifically, the design of a prototype facade-integrated photovoltaic/thermal system with transpired collector (BIPV/T). A full scale prototype is constructed with 70% of UTC area covered with PV modules specially designed to enhance heat recovery and compared to a UTC of the same area under outdoor sunny conditions with low wind. The orientation of the corrugations in the UTC is horizontal and the black-framed modules are attached so as to facilitate flow into the UTC plenum. While the overall combined thermal efficiency of the UTC is higher than that of the BIPV/T system, the value of the generated energy - assuming that electricity is at least four times more valuable than heat - is between 7% and 17% higher. Also, the electricity is always useful while the heat is usually utilized only in the heating season. The BIPV/T concept is applied to a full scale office building demonstration project in Montreal, Canada. The ratio of photovoltaic area coverage of the UTC may be selected based on the fresh air heating needs of the building, the value of the electricity generated and the available building surfaces. (author)

Athienitis, Andreas K.; Bambara, James; O'Neill, Brendan; Faille, Jonathan [Dept. of Building, Civil and Environmental Engineering, Concordia University, 1455 Maisonneuve W., Montreal, Quebec (Canada)

2011-01-15T23:59:59.000Z

72

Interim performance criteria for photovoltaic energy systems. [Glossary included  

DOE Green Energy (OSTI)

This document is a response to the Photovoltaic Research, Development, and Demonstration Act of 1978 (P.L. 95-590) which required the generation of performance criteria for photovoltaic energy systems. Since the document is evolutionary and will be updated, the term interim is used. More than 50 experts in the photovoltaic field have contributed in the writing and review of the 179 performance criteria listed in this document. The performance criteria address characteristics of present-day photovoltaic systems that are of interest to manufacturers, government agencies, purchasers, and all others interested in various aspects of photovoltaic system performance and safety. The performance criteria apply to the system as a whole and to its possible subsystems: array, power conditioning, monitor and control, storage, cabling, and power distribution. They are further categorized according to the following performance attributes: electrical, thermal, mechanical/structural, safety, durability/reliability, installation/operation/maintenance, and building/site. Each criterion contains a statement of expected performance (nonprescriptive), a method of evaluation, and a commentary with further information or justification. Over 50 references for background information are also given. A glossary with definitions relevant to photovoltaic systems and a section on test methods are presented in the appendices. Twenty test methods are included to measure performance characteristics of the subsystem elements. These test methods and other parts of the document will be expanded or revised as future experience and needs dictate.

DeBlasio, R.; Forman, S.; Hogan, S.; Nuss, G.; Post, H.; Ross, R.; Schafft, H.

1980-12-01T23:59:59.000Z

73

Residential Photovoltaic Energy Systems in California: The Effect on Home Sales Prices  

E-Print Network (OSTI)

Residential Photovoltaic Energy Systems in California: Themarginal impacts of photovoltaic (PV) energy systems on home

Hoen, Ben

2013-01-01T23:59:59.000Z

74

Equilibrium thermal characteristics of a building integrated photovoltaic tiled roof  

SciTech Connect

Photovoltaic (PV) modules attain high temperatures when exposed to a combination of high radiation levels and elevated ambient temperatures. The temperature rise can be particularly problematic for fully building integrated PV (BIPV) roof tile systems if back ventilation is restricted. PV laminates could suffer yield degradation and accelerated aging in these conditions. This paper presents a laboratory based experimental investigation undertaken to determine the potential for high temperature operation in such a BIPV installation. This is achieved by ascertaining the dependence of the PV roof tile temperature on incident radiation and ambient temperature. A theory based correction was developed to account for the unrealistic sky temperature of the solar simulator used in the experiments. The particular PV roof tiles used are warranted up to an operational temperature of 85 C, anything above this temperature will void the warranty because of potential damage to the integrity of the encapsulation. As a guide for installers, a map of southern Europe has been generated indicating locations where excessive module temperatures might be expected and thus where installation is inadvisable. (author)

Mei, L.; Gottschalg, R.; Loveday, D.L. [Centre for Renewable Energy Systems Technology (CREST), Department of Electronic and Electrical Engineering, Loughborough University, Loughborough, Leicestershire, LE11 3TU (United Kingdom); Infield, D.G. [Institute of Energy and Environment, Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, G1 1XW (United Kingdom); Davies, D.; Berry, M. [Solarcentury, 91-94 Lower Marsh Waterloo, London, SE1 7AB (United Kingdom)

2009-10-15T23:59:59.000Z

75

Residential Photovoltaic Energy Systems in California: The Effect...  

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

Residential Photovoltaic Energy Systems in California: The Effect on Home Sales Prices Title Residential Photovoltaic Energy Systems in California: The Effect on Home Sales Prices...

76

Photovoltaic system planning tool with internet access  

Science Conference Proceedings (OSTI)

This paper presents advanced planning models integrated into a GIS-computational tool, based on a Geographic Information System, for evaluating solar energy resources, selecting the most suitable photovoltaic technology, and calculating the cost associated ... Keywords: distributed generation planning, internet GIS services, photovoltaic systems

I. J. Ramírez-Rosado; P. J. Zorzano-Santamaría; L. A. Fernández-Jiménez; E. García-Garrido

2007-01-01T23:59:59.000Z

77

Flat-Plate Photovoltaic Systems | Department of Energy  

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

Flat-Plate Photovoltaic Systems Flat-Plate Photovoltaic Systems August 20, 2013 - 4:03pm Addthis The most common photovoltaic (PV) array design uses flat-plate PV modules or...

78

Building Technologies Office: Integrated Building Management System  

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

Integrated Building Integrated Building Management System Research Project to someone by E-mail Share Building Technologies Office: Integrated Building Management System Research Project on Facebook Tweet about Building Technologies Office: Integrated Building Management System Research Project on Twitter Bookmark Building Technologies Office: Integrated Building Management System Research Project on Google Bookmark Building Technologies Office: Integrated Building Management System Research Project on Delicious Rank Building Technologies Office: Integrated Building Management System Research Project on Digg Find More places to share Building Technologies Office: Integrated Building Management System Research Project on AddThis.com... About Take Action to Save Energy Partner with DOE

79

Building-integrated photovoltaics (BIPV): Analysis and US market potential. Final report  

DOE Green Energy (OSTI)

Arthur D. Little, Inc., in conjunction with Solar Design Associates, conducted a study for the US Department of Energy (DOE), Office of Building Technologies (OBT) to determine the market potential for grid-connected, building-integrated photovoltaics (BIPV). This study defines BIPV as two types of applications: (1) where the PV modules are an integral part of the building, often serving as the exterior weathering skin; and (2) the PV modules are mounted on the existing building exterior. Both of these systems are fully integrated with the energy usage of the building and have potential for significant market penetration in the US. Off-grid building applications also offer a near-term market for BIPV, but are not included in the scope of this study.

Frantzis, L.; Friedman, D.; Hill, S.; Teagan, P. [Little (Arthur D.), Inc., Cambridge, MA (United States); Strong, S.; Strong, M. [Solar Design Associates, Harvard, MA (United States)

1995-02-01T23:59:59.000Z

80

Photovoltaic System Layout for Optimized Self-Consumption.  

E-Print Network (OSTI)

?? Most of the photovoltaic (solar cell) systems in Sweden today are installed on private houses and connected to the public grid. Photovoltaic (PV) power… (more)

Luthander, Rasmus

2013-01-01T23:59:59.000Z

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


81

Concentrator Photovoltaic System Basics | Department of Energy  

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

Concentrator Photovoltaic System Basics Concentrator Photovoltaic System Basics Concentrator Photovoltaic System Basics August 20, 2013 - 4:12pm Addthis Concentrator photovoltaic (PV) systems use less solar cell material than other PV systems. PV cells are the most expensive components of a PV system, on a per-area basis. A concentrator makes use of relatively inexpensive materials such as plastic lenses and metal housings to capture the solar energy shining on a fairly large area and focus that energy onto a smaller area-the solar cell. One measure of the effectiveness of this approach is the concentration ratio-in other words, how much concentration the cell is receiving. Concentrator PV systems have several advantages over flat-plate systems. First, concentrator systems reduce the size or number of cells needed and

82

25 Year Lifetime for Flexible Buildings Integrated Photovoltaics  

SciTech Connect

Although preliminary proof-of-principle of the efficacy of barrier materials and processes, first developed by Battelle at PNNL and commercialized by Vitex, has been demonstrated at the laboratory scale, there are several challenges to the practical commercial implementation of these developments in the Buildings Integrated Photovoltaics (BIPV) market. Two important issues that are addressed in this project are identifying a low cost substrate material that can survive in the outside environment (rain, heat, dust, hail, etc.) for 25 years and developing an encapsulation method for the photovoltaic (PV) cells that can meet the required barrier performance without driving the cost of the total barrier package out of range (remaining below $3.00/Wp). Without these solutions, current encapsulation technologies will limit the use of PV for BIPV applications. Flexible, light-weight packaging that can withstand 25 years in the field is required for a totally flexible integrated PV package. The benefit of this research is to make substantial progress in the development of a cost-effective, viable thin film barrier package which will be a critical enabling technology to meet the Solar America Initiative cost and device reliability goals, and to make photovoltaics (PV) more cost-competitive with electricity generated using fossil fuels. Increased PV installations will enable increased US electrical capacity and reduce dependence on imported oil through increased utilization of a widely abundant source of renewable energy (sunlight).

Gross, Mark E.

2010-07-10T23:59:59.000Z

83

Future contingencies and photovoltaic system worth  

DOE Green Energy (OSTI)

The value of dispersed photovoltaic systems connected to the utility grid has been calculated using the General Electric Optimized Generation Planning program. The 1986 to 2001 time period was used for this study. Photovoltaic systems were dynamically integrated, up to 5% total capacity, into 9 NERC based regions under a range of future fuel and economic contingencies. Value was determined by the change in revenue requirements due to the photovoltaic additions. Displacement of high cost fuel was paramount to value, while capacity displacement was highly variable and dependent upon regional fuel mix.

Jones, G. J.; Thomas, M. G.; Bonk, G. J.

1982-01-01T23:59:59.000Z

84

Making the most of residential photovoltaic systems  

DOE Green Energy (OSTI)

Making the Most of Residential Photovoltaic Systems, was recently produced by NREL Communications and Public Affairs. It showcases a demonstration project in Florida that produced some remarkable results by incorporating both energy efficiency and photovoltaic systems into newly built housing. The brochure points up the benefits of making wise personal choices about energy use, and how large-scale use of advanced energy technologies can benefit the nation. This is one of a series of brochures that presents stimulating information about photovoltaics, with a goal of helping to push this technology into the power-generation mix in different utilities, communities, and states.

Moon, S.; Parker, D.; Hayter, S.

1999-10-18T23:59:59.000Z

85

Environmental Assessment of Photovoltaic Systems and Effectiveness...  

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

Photovoltaic Systems and Effectiveness Analysis of U.S. Renewable Energy Policies Speaker(s): Pei Zhai Date: October 25, 2010 - 12:00pm Location: 90-3122 Seminar HostPoint of...

86

Photovoltaic Systems Interconnected onto Network Distribution Systems--Success Stories  

DOE Green Energy (OSTI)

This report examines six case studies of photovoltaic systems integrated into secondary network systems in four major U.S. Solar America cities.

Coddington, M.; Kroposki, B.; Basso, T.; Lynn, K.; Sammon, D.; Vaziri, M.; Yohn, T.

2009-04-01T23:59:59.000Z

87

Do Photovoltaic Energy Systems Effect Residential Selling Prices? Results from a California Statewide Investigation.  

E-Print Network (OSTI)

DO PHOTOVOLTAIC ENERGY SYSTEMS AFFECT RESIDENTIAL SELLINGopportunity employer. DO PHOTOVOLTAIC ENERGY SYSTEMS AFFECThave sold with photovoltaic (PV) energy systems installed at

Hoen, Ben

2012-01-01T23:59:59.000Z

88

An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California  

E-Print Network (OSTI)

Effects of Residential Photovoltaic Energy Systems on HomeEffects of Residential Photovoltaic Energy Systems on Homewith existing photovoltaic (PV) energy systems have sold in

Hoen, Ben

2011-01-01T23:59:59.000Z

89

An Analysis of the Effects of Photovoltaic Energy Systems on Residential Selling Prices in California.  

E-Print Network (OSTI)

Effects of Residential Photovoltaic Energy Systems on Homewith existing photovoltaic (PV) energy systems have sold ingrid-connected solar photovoltaic (PV) energy systems were

Cappers, Peter

2012-01-01T23:59:59.000Z

90

Analysis of batteries for use in photovoltaic systems. Final report  

SciTech Connect

An evaluation of 11 types of secondary batteries for energy storage in photovoltaic electric power systems is given. The evaluation was based on six specific application scenarios which were selected to represent the diverse requirements of various photovoltaic systems. Electrical load characteristics and solar insulation data were first obtained for each application scenario. A computer-based simulation program, SOLSIM, was then developed to determine optimal sizes for battery, solar array, and power conditioning systems. Projected service lives and battery costs were used to estimate life-cycle costs for each candidate battery type. The evaluation considered battery life-cycle cost, safety and health effects associated with battery operation, and reliability/maintainability. The 11 battery types were: lead-acid, nickel-zinc, nickel-iron, nickel-hydrogen, lithium-iron sulfide, calcium-iron sulfide, sodium-sulfur, zinc-chlorine, zinc-bromine, Redox, and zinc-ferricyanide. The six application scenarios were: (1) a single-family house in Denver, Colorado (photovoltaic system connected to the utility line); (2) a remote village in equatorial Africa (stand-alone power system); (3) a dairy farm in Howard County, Maryland (onsite generator for backup power); (4) a 50,000 square foot office building in Washington, DC (onsite generator backup); (5) a community in central Arizona with a population of 10,000 (battery to be used for dedicated energy storage for a utility grid-connected photovoltaic power plant); and (6) a military field telephone office with a constant 300 W load (trailer-mounted auxiliary generator backup). Recommendations for a research and development program on battery energy storage for photovoltaic applications are given, and a discussion of electrical interfacing problems for utility line-connected photovoltaic power systems is included. (WHK)

Podder, A.; Kapner, M.

1981-02-01T23:59:59.000Z

91

Photovoltaic Cells  

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

Photovoltaic (PV) cells, or solar cells, take advantage of the photoelectric effect to produce electricity. PV cells are the building blocks of all PV systems because they are the devices that...

92

Photovoltaic System Basics | Department of Energy  

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

System Basics System Basics Photovoltaic System Basics August 20, 2013 - 4:00pm Addthis A photovoltaic (PV), or solar electric system, is made up of several photovoltaic solar cells. An individual PV cell is usually small, typically producing about 1 or 2 watts of power. To boost the power output of PV cells, they are connected together to form larger units called modules. Modules, in turn, can be connected to form even larger units called arrays, which can be interconnected to produce more power, and so on. In this way, PV systems can be built to meet almost any electric power need, small or large. Illustration of solar cells combined to make a module and modules combined to make an array. The basic PV or solar cell produces only a small amount of power. To produce more power, cells can be interconnected to

93

Online fault detection and tolerance for photovoltaic energy harvesting systems  

Science Conference Proceedings (OSTI)

Photovoltaic energy harvesting systems (PV systems) are subject to PV cell faults, which decrease the efficiency of PV systems and even shorten the PV system lifespan. Manual PV cell fault detection and elimination are expensive and nearly impossible ... Keywords: fault detection, fault tolerance, photovoltaic panel reconfiguration, photovoltaic system

Xue Lin; Yanzhi Wang; Di Zhu; Naehyuck Chang; Massoud Pedram

2012-11-01T23:59:59.000Z

94

Photovoltaic systems for export application. Informal report  

DOE Green Energy (OSTI)

One approach to improving the competitiveness of photovoltaic systems is the development of designs specifically for export applications. In other words, where is it appropriate in a system design to incorporate components manufactured and/or assembled in the receiving country in order to improve the photovoltaic exports from the US? What appears to be needed is a systematic method of evaluating the potential for export from the US of PV systems for various application in different countries. Development of such a method was the goal of this project.

Duffy, J.; Campbell, H.; Sajo, A.; Sanz, E. [Univ. of Lowell, MA (United States)

1988-01-31T23:59:59.000Z

95

Building America System Research  

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

Building America System Building America System Research Eric Werling, DOE Ren Anderson, NREL eric.werling@ee.doe.gov, 202-586-0410 ren.anderson@nrel.gov, 303-384-7443 April 2, 2013 Building America System Innovations: Accelerating Innovation in Home Energy Savings 2 | Program Name or Ancillary Text eere.energy.gov Project Relevance 3 | Building Technologies Office eere.energy.gov Building America Fills Market Need for a High-Performance Homes HUB of Innovation

96

Building-Integrated Photovoltaics (BIPV) in the Residential Section: An Analysis of Installed Rooftop Prices (Presentation)  

DOE Green Energy (OSTI)

This powerpoint presentation to be presented at the World Renewable Energy Forum on May 17, 2012, in Denver, CO, discusses building-integrated photovoltaics (BIPV) in the residential section and includes an analysis of installed rooftop prices.

James, T.; Goodrich, A.; Woodhouse, M.; Margolis, R.; Ong, S.

2012-06-01T23:59:59.000Z

97

Photovoltaic systems concept study. Final report  

DOE Green Energy (OSTI)

The work performed in the conceptual design and systems analysis of three sizes of photovoltaic solar electric power systems is contained in five volumes consisting of nine sections plus appendices. Separate abstracts were prepared for the two sections in this volume. (MHR)

Not Available

1977-04-01T23:59:59.000Z

98

Energy Basics: Flat-Plate Photovoltaic Balance of System  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Solar Photovoltaics Cells Systems Concentrating Solar...

99

Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems  

E-Print Network (OSTI)

21st European Photovoltaic Solar Energy Conference, Dresden,21st European Photovoltaic Solar Energy Conference, Dresden,International Energy Agency Photovoltaic Power System

Zhang, Teresa Weirui

2011-01-01T23:59:59.000Z

100

Photovoltaics  

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

Photovoltaic (PV) materials and devices convert sunlight into electrical energy, and PV cells are commonly known as solar cells. Photovoltaics can literally be translated as light-electricity.

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


101

Flat-Plate Photovoltaic Systems  

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

The most common photovoltaic (PV) array design uses flat-plate PV modules or panels. These panels can be fixed in place or allowed to track the movement of the sun. They respond to sunlight that is direct or diffuse. Even in clear skies, the diffuse component of sunlight accounts for between 10% and 20% of the total solar radiation on a horizontal surface. On partly sunny days, up to 50% of that radiation is diffuse, and on cloudy days, 100% of the radiation is diffuse.

102

Low-cost, Modular, Building-integrated Photovoltaic-Thermal ...  

... hot water and pre-heated ventilation air production in ... Heat collection will improve solar electric output by actively cooling the photovoltaic ...

103

Household type load's effects on photovoltaic systems  

Science Conference Proceedings (OSTI)

The solar energy is one of the most important energy sources available because, besides the fact that it is not polluting the environment and it helps to the reduction of green house effect, it is free of charge and it can be easily converted to other ... Keywords: A.C. loads, D.C. loads, compact fluorescent lamp, photovoltaic system, power LED

Nazmi Ekren; Nevzat Onat; Safak Saglam

2008-12-01T23:59:59.000Z

104

Uses for Distributed Photovoltaic and Storage Systems  

Science Conference Proceedings (OSTI)

A range of factors are driving increases in the quantity of distributed photovoltaics connected to utility distribution systems. Going forward, it is anticipated that this growth will continue and that battery storage systems may also become common. These systems are expected to be both customer and utility owned. In either case, there is interest in understanding the full range of ways in which these systems might be used to maximize their value, to enable their integration in large numbers, and to opti...

2010-12-23T23:59:59.000Z

105

City of San Jose - Solar Hot Water Heaters and Photovoltaic Systems Permit  

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

San Jose - Solar Hot Water Heaters and Photovoltaic Systems San Jose - Solar Hot Water Heaters and Photovoltaic Systems Permit Requirements City of San Jose - Solar Hot Water Heaters and Photovoltaic Systems Permit Requirements < Back Eligibility Commercial Construction Industrial Installer/Contractor Multi-Family Residential Residential Savings Category Solar Buying & Making Electricity Program Info State California Program Type Solar/Wind Permitting Standards Provider City of San Jose Building, Planning and Electrical Permits are required for Photovoltiac (PV) systems installed in San Jose. In most cases, PV systems must also undergo a Building Plan Review and an Electrical Plan Review. Building Plan Reviews are not required for installations that meet all of the following criteria: 1. Total panel weight (including frame) is not greater than 5 lbs. per

106

Building-Integrated Photovoltaic Desings for Commerical and Institutional Structures: A Sourcebook for Architects  

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

Building-Integrated Photovoltaic Building-Integrated Photovoltaic Designs for Commercial and Institutional Structures A Sourcebook for Architects Patrina Eiffert, Ph.D. Gregory J. Kiss Acknowledgements Building-Integrated Photovoltaics for Commercial and Institutional Structures: A Sourcebook for Architects and Engineers was prepared for the U.S. Department of Energy's (DOE's) Office of Power Technologies, Photovoltaics Division, and the Federal Energy Management Program. It was written by Patrina Eiffert, Ph.D., of the Deployment Facilitation Center at DOE's National Renewable Energy Laboratory (NREL) and Gregory J. Kiss of Kiss + Cathcart Architects. The authors would like to acknowledge the valuable contributions of Sheila Hayter, P.E., Andy Walker, Ph.D., P.E., and Jeff Wiechman of NREL, and Anne

107

Building-Integrated Photovoltaic Desings for Commerical and Institutional Structures: A Sourcebook for Architects  

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

Building-Integrated Photovoltaic Building-Integrated Photovoltaic Designs for Commercial and Institutional Structures A Sourcebook for Architects Patrina Eiffert, Ph.D. Gregory J. Kiss Acknowledgements Building-Integrated Photovoltaics for Commercial and Institutional Structures: A Sourcebook for Architects and Engineers was prepared for the U.S. Department of Energy's (DOE's) Office of Power Technologies, Photovoltaics Division, and the Federal Energy Management Program. It was written by Patrina Eiffert, Ph.D., of the Deployment Facilitation Center at DOE's National Renewable Energy Laboratory (NREL) and Gregory J. Kiss of Kiss + Cathcart Architects. The authors would like to acknowledge the valuable contributions of Sheila Hayter, P.E., Andy Walker, Ph.D., P.E., and Jeff Wiechman of NREL, and Anne

108

Superior Valley photovoltaic power processing and system controller evaluation  

DOE Green Energy (OSTI)

Sandia National Laboratories, sponsored by the US Department of Energy`s Office of Energy Management, conducts the photovoltaic balance-of-system program. Under this program, Sandia supports the Department of Defense Strategic Environmental Research Development Plan, SERDP, which is advancing the use of photovoltaics in operational DoD facilities. This report details the acceptance testing of the first of these photovoltaic hybrid systems: the Superior Valley photovoltaic-diesel hybrid system. This is the first of several photovoltaic installations for the Department of Defense. The system hardware tested at Sandia included an inverter, maximum power trackers, and a system controller.

Bonn, R.; Ginn, J.; Zirzow, J.; Sittler, G.

1995-11-01T23:59:59.000Z

109

Photovoltaic Systems Assessment: An Integrated Perspective  

Science Conference Proceedings (OSTI)

Information from recent photovoltaic (PV) research and technology assessments was synthesized into a review of key planning, hardware, institutional, and operational issues. Researchers reviewed PV cell and module technologies, results from ongoing field tests of intermediate-size systems, and balance-of-system (non-PV components) costs for residential, intermediate, and central station applications. Cost-performance targets for PV systems in various locations were developed.

1983-09-01T23:59:59.000Z

110

Photovoltaic Balance-of-System Assessment  

Science Conference Proceedings (OSTI)

The balance-of-system status for photovoltaic power systems is assessed, including all subsystems and components (except for cells and modules) that are needed for a fully functional power system. Array types for the central station, intermediate, and residential applications are evaluated; both active and passive cooling are considered for the central station and intermediate applications; and battery energy storage is included as an option for intermediate and residential applications.

1982-06-01T23:59:59.000Z

111

Shared inverter residential photovoltaic system concept  

SciTech Connect

A residential photovoltaic system concept involving a number of separate roof-mounted arrays all connected to a single utility-interactive inverter is proposed and analyzed in comparison to systems employing one inverter for each array. The conclusion of significance is that such shared inverter systems offer a costs savings of approximately 10 percent. It is observed that other substantial benefits might derive from a reduction in the number of tie-in points between distributed generators and the electric utility grid.

Kern, E.C.; Solman, F.J.

1981-11-01T23:59:59.000Z

112

Conceptual design and systems analysis of photovoltaic systems. Volume II. Study results. Final report  

DOE Green Energy (OSTI)

This investigation of terrestrial PV systems considered the technical and economic feasibility for systems in three size categories: a small system of about 12 kW peak output for on-site residential use; a large 1500 MW central power plant contributing to the bulk energy of a utility system power grid; and an intermediate size system of about 250 kW for use on public or commercial buildings. In each category, conceptual designs were developed, performance was analyzed for a range of climatic regions, economic analyses were performed, and assessments were made of pertinent institutional issues. The report consists of three volumes. Volume I contains a Study Summary of the major study results. This volume contains the detailed results pertaining to on-site residential photovoltaic systems, central power plant photovoltaic systems, and intermediate size systems applied to commercial and public buildings. Volume III contains supporting appendix material. (WHK)

Kirpich, A.

1977-03-19T23:59:59.000Z

113

Building and Fire Publications  

Science Conference Proceedings (OSTI)

... Measured Performance of Building Integrated Photovoltaic Panels. Round 2. Measured Performance of Building Integrated Photovoltaic Panels. ...

114

El Paso Electric photovoltaic-system analyses  

DOE Green Energy (OSTI)

Four analyses were performed on the Newman Power Station PV system. Two were performed using the Photovoltaic Transient Analysis Program (PV-TAP) and two with the SOLCEL II code. The first was to determine the optimum tilt angle for the array and the sensitivity of the annual energy production to variation in tilt angle. The optimum tilt angle was found to be 28/sup 0/, and variations of 2/sup 0/ produce losses of only 0.06% in the annual energy production. The second analysis assesses the power loss due to cell-to-cell variations in short circuit current and the degree of improvement attainable by sorting cells and matching modules. Typical distributions on short circuit current can cause losses of about 9.5 to 11 percent in peak array power, and sorting cells into 4 bins prior to module assembly can reduce the losses to about 6 to 8 percent. Using modules from the same cell bins in building series strings can reduce the losses to about 4.5 to 6 percent. Results are nearly the same if the array is operated at a fixed votage. The third study quantifies the magnitude and frequency of occurrence of high cell temperatures due to reverse bias caused by shadowing, and it demonstrates that cell temperatures achieved in reverse bias are higher for cells with larger shunt resistance. The last study assesses the adequacy of transient protection devices on the dc power lines to transients produced by array switching and lightning. Large surge capacitors on the dc power line effectively limit voltage excursions at the array and at the control room due to lightning. Without insertion of series resistors, the current may be limited only by cable and switch impedances, and all elements could be severely stressed. (LEW)

Not Available

1982-05-01T23:59:59.000Z

115

Photovoltaics as an operating energy system  

DOE Green Energy (OSTI)

In the short time since the discovery of the modern solar cell in 1954, terrestrial photovoltaic power system technology has matured in all areas, from collector reliability to system and subsystem design and operations. Today's PV systems are finding widespread use in powering loads where conventional sources are either unavailable, unreliable, or too costly. A broad range of applications is possible because of the modularity of the technology---it can be used to power loads ranging from less than a watt to several megawatts. This inherent modularity makes PV an excellent choice to play a major role in rural electrification in the developing world. The future for grid-connected photovoltaic systems is also very promising. Indications are that several of today's technologies, at higher production rates and in megawatt-sized installations, will generate electricity in the vicinity of $0.12/kWh in the near future. 12 refs., 3 figs.

Jones, G.J.; Post, H.N.; Thomas, M.G.

1988-01-01T23:59:59.000Z

116

Cost calculation algorithm for stand-alone photovoltaic systems  

Science Conference Proceedings (OSTI)

Photovoltaics are the technology that generates direct current (DC) electrical power measured in watts or kilowatts from semiconductors when they are illuminated by photons. Photovoltaics are the technological symbol for a future sustainable energy supply ... Keywords: PV system design, life cycle cost, photovoltaic cell, present worth, software, unit energy cost

Irfan Güney; Nevzat Onat; Gökhan Koçyi?it

2009-07-01T23:59:59.000Z

117

Solar photovoltaic/thermal residential systems  

DOE Green Energy (OSTI)

The results of a conceptual design study using computer simulations to determine the physical and economic performance of combined photovoltaic/thermal collector heat-pump solar systems for a single-family residence are presented. Economic analyses are based upon projected costs for a 1986 system installation. The results show that PV/T collector systems can be economically competitive for a cold climate residence, that systems employing on-site electrical storage batteries are not economically competitive with utility-interactive systems, and that an ambient-air-source heat-pump system has a lower life-cycle cost than a solar-source heat-pump system.

Russell, M.C.

1979-12-28T23:59:59.000Z

118

Defining Requirements for Improved Photovoltaic System Reliability  

DOE Green Energy (OSTI)

Reliable systems are an essential ingredient of any technology progressing toward commercial maturity and large-scale deployment. This paper defines reliability as meeting system fictional requirements, and then develops a framework to understand and quantify photovoltaic system reliability based on initial and ongoing costs and system value. The core elements necessary to achieve reliable PV systems are reviewed. These include appropriate system design, satisfactory component reliability, and proper installation and servicing. Reliability status, key issues, and present needs in system reliability are summarized for four application sectors.

Maish, A.B.

1998-12-21T23:59:59.000Z

119

Performance and Modeling of Amorphous Silicon Photovoltaics for Building-Integrated Applications (Preprint prepared for Solar 99)  

Science Conference Proceedings (OSTI)

Amorphous silicon photovoltaic (PV) modules offer several advantages for building-integrated applications. The material can be deposited on glass or flexible substrates, which allows for products like roofing shingles and integrated PV/building glass. The material also has a uniform surface, which is ideal for many architectural applications. Amorphous silicon modules perform well in warm weather and have a small temperature coefficient for power. Depending on the building load, this may be beneficial when compared to crystalline systems. At the National Renewable Energy Laboratory, we are monitoring the performance of a triple-junction a-Si system. The system consists of 72 roofing shingles mounted directly to simulated roofing structures. This paper examines the performance of the building-integrated amorphous silicon PV system and applicability for covering residential loads. A simple model of system performance is also developed and is presented.

Kroposki, B.; Hansen, R.

1998-06-07T23:59:59.000Z

120

Commercial Application of a Photovoltaic Concentrator system. Phase I. Final report, 1 June 1978-28 February 1979  

DOE Green Energy (OSTI)

This report documents the design and analysis of the BDM CAPVC (Commercial Application of a Photovoltaic Concentrator) system. The preliminary design, prototype test and evaluation, system analysis, and final design of a large-scale concentrating photovoltaic system are described. The application is on an attractive new office building which represents a large potential market. The photovoltaic concentrating array is a roof-mounted, single-axis linear parabolic trough, using single crystalline silicon photovoltaic cells. A total of 6720 square feet of aperture is focussed on 13,944 PV cells. The photovoltaic system operates in parallel with the local utility in an augmentary loadsharing operating mode. The array is actively cooled and the thermal energy utilized for building heat during winter months. (WHK)

Anderson, D.J.; Anderson, E.R.; Bardwell, K.M.

1980-04-01T23:59:59.000Z

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


121

Energy Basics: Flat-Plate Photovoltaic Balance of System  

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

Balance of System Complete photovoltaic (PV) energy systems are composed of three subsystems. On the power-generation side, the first subsystem of PV devices (cells, modules, and...

122

Residential solar photovoltaic systems: Final report for the Northeast Residential Experiment Station  

Science Conference Proceedings (OSTI)

This report covers research and development work conducted by the MIT Energy Lab. from July 1982 through June 1986. This Energy Lab. work in the field of solar photovoltaic systems followed six years of similar work at the MIT Lincoln Lab. under the same contract with the US DOE. The final report from the Lincoln Lab. period was published by Lincoln Lab. in 1983. During the period of Energy Lab. involvement, the project focused on the refinement of residential scale, roof-mounted photovoltaic systems for application in the northeastern US. Concurrent with the conclusion of MIT`s involvement, the New England Electric Co. is building a major field test of residential photovoltaics in Gardner, Massachusetts to determine experimentally the effects of photovoltaics on electric power company operations. Using systems designs and technology developed at MIT, the long-term performance of these thirty residential systems in Gardner will provide a measure of our success.

Kern, E.C. Jr.

1986-06-01T23:59:59.000Z

123

Photovoltaics  

DOE Green Energy (OSTI)

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

Not Available

2008-09-01T23:59:59.000Z

124

Introduction to Small-Scale Photovoltaic Systems (Including RETScreen Case  

Open Energy Info (EERE)

Introduction to Small-Scale Photovoltaic Systems (Including RETScreen Case Introduction to Small-Scale Photovoltaic Systems (Including RETScreen Case Study) (Webinar) Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Introduction to Small-Scale Photovoltaic Systems (Including RETScreen Case Study) (Webinar) Focus Area: Solar Topics: Market Analysis Website: www.leonardo-energy.org/webinar-introduction-small-scale-photovoltaic- Equivalent URI: cleanenergysolutions.org/content/introduction-small-scale-photovoltaic Language: English Policies: Deployment Programs DeploymentPrograms: Project Development This video teaches the viewer about photovoltaic arrays and RETscreen's photovoltaic module, which can be used to project the cost and production of an array. An example case study was

125

Solar Photovoltaic System Operations and Maintenance  

Science Conference Proceedings (OSTI)

Grid-connected flat plate solar photovoltaic (PV) systems are being deployed at an accelerating rate worldwide. Representing a growing absolute share of both independent power producer (IPP) and utility generation portfolios, these PV assets are now commanding a greater level of attention to ensure their optimal availability and performance. Contrary to popular belief, PV power plants are not maintenance free; in fact, they require a steady diet of scheduled preventive maintenance and unscheduled service...

2011-12-22T23:59:59.000Z

126

Building opportunities for photovoltaics in the U.S. Final report [PV BONUS  

DOE Green Energy (OSTI)

The objective of the North Carolina's PV Bonus Team was to develop and demonstrate a commercially viable, building-integrated, photovoltaic system that, in addition to providing electricity, would capture and effectively utilize the thermal energy produced by the photovoltaic array. This project objective was successfully achieved by designing, testing, constructing, and monitoring two roof integrated photovoltaic systems--one on a Applebee's Restaurant in Salisbury, North Carolina and the second on a Central Carolina Bank in Bessemer City, North Carolina. The goal of Innovative Design is to now use these successful demonstrations to facilitate entry of building integrated, pv/thermal systems into the marketplace. The strategy was to develop the two systems that could be utilized in future applications. Both systems were designed and then constructed at the North Carolina Solar Center at North Carolina State University. After extensive testing at the North Carolina Solar Center, the systems were moved to the actual construction sites and implemented. The Applebee's Restaurant system was designed to substitute for the roof assembly of a low sloping, south-facing sunspace roof that typically incorporated clay tile. After monitoring the installed system for one year it was determined that the 1.2 kilowatt (peak) system produces an average peak reduction of 1 kilowatt (rated peak is 1.7 kiloWatts), saves 1,529 kilowatt-hours of electricity, and offsets 11,776 kilowatt-hours of thermal energy savings used to pre-heat water. A DC fan connected directly to eight of the thirty-two amorphous modules moves air through air passages mounted on the backside of the modules and into a closed loop duct system to a heat exchanger. This heat exchanger is, in turn, connected to a pre-heat hot water tank that is used to heat the water for the restaurant. The Central Carolina Bank system was designed to substitute for the roof assembly of the drive-in window area of the bank. The design featured a triangulated truss that incorporated ten crystalline photovoltaic modules on one side of the truss and a reflective panel on the opposite side. The system used a utility interactive, programmable inverter and a 18.9 kilowatt-hour battery bank. The system is designed so that a DC fan, connected to one of the modules, forces ambient air across the back side of the modules. In the summer this heat is vented to the outside but in the winter this heated, fresh air is introduced into the building as ventilation air. Like the Applebee's system, the design allowed the entire roof assembly to be constructed off-site, tested, and then shipped to the site in pie-assembled, large components. During the first full year of operation, the 2.2 kilowatt (rated peak is 2.7 kilowatts) system contributed to an average peak reduction of .9 kilowatts. The system, as designed, saves 2,576 kilowatt-hours of electricity and offsets 3,473 kilowatt hours (of a potential thermal benefit of 10,172 collected kWhs) of thermal energy savings that is used as fresh air make-up in the colder months. This report is a summary of their conclusions.

Michael Nicklas

1999-09-08T23:59:59.000Z

127

Summary of photovoltaic system performance models  

DOE Green Energy (OSTI)

The purpose of this study is to provide a detailed overview of photovoltaics (PV) performance modeling capabilities that have been developed during recent years for analyzing PV system and component design and policy issues. A set of 10 performance models have been selected which span a representative range of capabilities from generalized first-order calculations to highly specialized electrical network simulations. A set of performance modeling topics and characteristics is defined and used to examine some of the major issues associated with photovoltaic performance modeling. Next, each of the models is described in the context of these topics and characteristics to assess its purpose, approach, and level of detail. Then each of the issues is discussed in terms of the range of model capabilities available and summarized in tabular form for quick reference. Finally, the models are grouped into categories to illustrate their purposes and perspectives.

Smith, J. H.; Reiter, L. J.

1984-01-15T23:59:59.000Z

128

Low-cost, Modular, Building-integrated Photovoltaic-Thermal ...  

Buildings consume approximately 40% of the energy, and nearly 70% of the electricity used in the United States. Building surfaces are well suited to renewable energy ...

129

Progress in photovoltaic system and component improvements  

DOE Green Energy (OSTI)

The Photovoltaic Manufacturing Technology (PVMaT) project is a partnership between the US government (through the US Department of Energy [DOE]) and the PV industry. Part of its purpose is to conduct manufacturing technology research and development to address the issues and opportunities identified by industry to advance photovoltaic (PV) systems and components. The project was initiated in 1990 and has been conducted in several phases to support the evolution of PV industrial manufacturing technology. Early phases of the project stressed PV module manufacturing. Starting with Phase 4A and continuing in Phase 5A, the goals were broadened to include improvement of component efficiency, energy storage and manufacturing and system or component integration to bring together all elements for a PV product. This paper summarizes PV manufacturers` accomplishments in components, system integration, and alternative manufacturing methods. Their approaches have resulted in improved hardware and PV system performance, better system compatibility, and new system capabilities. Results include new products such as Underwriters Laboratories (UL)-listed AC PV modules, modular inverters, and advanced inverter designs that use readily available and standard components. Work planned in Phase 5A1 includes integrated residential and commercial roof-top systems, PV systems with energy storage, and 300-Wac to 4-kWac inverters.

Thomas, H.P.; Kroposki, B.; McNutt, P.; Witt, C.E. [National Renewable Energy Lab., Golden, CO (United States); Bower, W.; Bonn, R.; Hund, T.D. [Sandia National Labs., Albuquerque, NM (United States)

1998-07-01T23:59:59.000Z

130

Progress in photovoltaic system and component improvements  

SciTech Connect

The Photovoltaic Manufacturing Technology (PVMaT) project is a partnership between the US government (through the US Department of Energy [DOE]) and the PV industry. Part of its purpose is to conduct manufacturing technology research and development to address the issues and opportunities identified by industry to advance photovoltaic (PV) systems and components. The project was initiated in 1990 and has been conducted in several phases to support the evolution of PV industrial manufacturing technology. Early phases of the project stressed PV module manufacturing. Starting with Phase 4A and continuing in Phase 5A, the goals were broadened to include improvement of component efficiency, energy storage and manufacturing and system or component integration to bring together all elements for a PV product. This paper summarizes PV manufacturers` accomplishments in components, system integration, and alternative manufacturing methods. Their approaches have resulted in improved hardware and PV system performance, better system compatibility, and new system capabilities. Results include new products such as Underwriters Laboratories (UL)-listed AC PV modules, modular inverters, and advanced inverter designs that use readily available and standard components. Work planned in Phase 5A1 includes integrated residential and commercial roof-top systems, PV systems with energy storage, and 300-Wac to 4-kWac inverters.

Thomas, H.P.; Kroposki, B.; McNutt, P.; Witt, C.E. [National Renewable Energy Lab., Golden, CO (United States); Bower, W.; Bonn, R.; Hund, T.D. [Sandia National Labs., Albuquerque, NM (United States)

1998-08-01T23:59:59.000Z

131

Case Studies of Grid-Connected Photovoltaic Systems, Vol. 1  

Science Conference Proceedings (OSTI)

This interim report documents a number of grid-connected photovoltaic (PV) case studies, covering a broad range of different system and project types.

2002-03-12T23:59:59.000Z

132

Online Fault Detection and Tolerance for Photovoltaic Energy Harvesting Systems  

E-Print Network (OSTI)

Online Fault Detection and Tolerance for Photovoltaic Energy Harvesting Systems Xue Lin 1 , Yanzhi, yanzhiwa, dizhu, pedram}@usc.edu, 2 naehyuck@elpl.snu.ac.kr ABSTRACT Photovoltaic energy harvesting systems (PV systems) are subject to PV cell faults, which decrease the efficiency of PV systems and even

Pedram, Massoud

133

Status of photovoltaic concentrator modules and systems  

DOE Green Energy (OSTI)

Several leading line- and point-focus photovoltaic concentrator system development programs are reviewed, including those by ENTECH, SEA Corporation, AMONIX, and Alpha Solarco. Concentrating collectors and trackers are gaining maturity and reaching product status as designs are made more manufacturable and reliable. Utilities are starting to take notice of this emerging technology, and several privately-funded utility installations are underway. Several advantages are offered by concentrators, including low system and capital cost and rapid production ramp-up. These are discussed along with issues generally raised concerning concentrator technology.

Maish, A.B.

1994-04-01T23:59:59.000Z

134

Rate Analysis of Two Photovoltaic Systems in San Diego  

DOE Green Energy (OSTI)

Analysts have found increasing evidence that rate structure has impacts on the economics of solar systems. This paper uses 2007 15-minute interval photovoltaic (PV) system and load data from two San Diego City water treatment facilities to illustrate impacts of different rate designs. The comparison is based on rates available in San Diego at the time of data collection and include proportionately small to large demand charges (relative to volumetric consumption), and varying on- and off- peak times. Findings are twofold for these large commercial systems: 1) transferring costs into demand charges does not result in savings and 2) changes in peak times do not result in a major cost difference during the course of a year. While lessons learned and discussion on rate components are based on the findings, the applicability is limited to buildings with similar systems, environments, rate options, and loads.

Doris, E.; Ong, S.; Van Geet, O.

2009-07-01T23:59:59.000Z

135

High-Performance Home Technologies: Solar Thermal & Photovoltaic Systems  

DOE Green Energy (OSTI)

This document is the sixth volume of the Building America Best Practices Series. It presents information that is useful throughout the United States for enhancing the energy efficiency practices in the specific climate zones that are presented in the first five Best Practices volumes. It provides an introduction to current photovoltaic and solar thermal building practices. Information about window selection and shading is included.

Baechler, M.; Gilbride, T.; Ruiz, K.; Steward, H.; Love, P.

2007-06-01T23:59:59.000Z

136

Factors Associated with Photovoltaic System Costs (Topical Issues Brief)  

Science Conference Proceedings (OSTI)

A variety of factors can affect the cost of photovoltaic systems. This report analyses the relationship among such factors by using information entered into a voluntary registry of PV systems and performing regression analyses. The results showed statistically significant relationships between photovoltaic system cost and (a) grid connection, (b) installation year, (c) areas where the utility had entered into volume purchasing agreements.

Mortensen, J.

2001-06-12T23:59:59.000Z

137

Building the Senceive System  

Science Conference Proceedings (OSTI)

The conception and development of pervasive systems, i.e, the systems which will be used in pervasive computing environments, involve interdisciplinary team work. Apparently, the team consists of people with a diverse research background and expertise. ... Keywords: activity recognition, building a sensing system, complex system design, network configuration, project work, wireless sensor networks

Waltenegus Dargie; Alexander Schill

2009-05-01T23:59:59.000Z

138

Photovoltaics for residential applications  

DOE Green Energy (OSTI)

Information is given about the parts of a residential photovoltaic system and considerations relevant to photovoltaic power use in homes that are also tied to utility lines. In addition, factors are discussed that influence implementation, including legal and environmental factors such as solar access and building codes, insurance, utility buyback, and system longevity. (LEW)

Not Available

1984-02-01T23:59:59.000Z

139

City of San Jose - Solar Hot Water Heaters and Photovoltaic Systems...  

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

Hot Water Heaters and Photovoltaic Systems Permit Requirements City of San Jose - Solar Hot Water Heaters and Photovoltaic Systems Permit Requirements Eligibility Commercial...

140

Progress in photovoltaic components and systems  

DOE Green Energy (OSTI)

The Photovoltaic Manufacturing Research and Development project is a government/industry partnership between the U.S. Department of Energy and members of the U.S. photovoltaic (PV) industry. The purpose of the project is to work with industry to improve manufacturing processes, reduce manufacturing costs, and improve the performance of PV products. This project is conducted through phased solicitations with industry participants selected through a competitive evaluation process. Starting in 1995, the two most recent solicitations include manufacturing improvements for balance-of-system (BOS) components, energy storage, and PV system design improvements. This paper surveys the work accomplished since that time, as well as BOS work currently in progress in the PV Manufacturing R&D project to identify areas of continued interest and product trends. Industry participants continue to work to improve inverters and to expand the features and capabilities of this key component. The industry also continues to advance fully integrated systems that meet standards for performance and safety. All participants included manufacturing improvements to reduce costs and improve reliability. Accomplishments of the project's participants are summarized to illustrate the product and manufacturing trends.

Thomas, H.; Kroposki, B.; Witt, C.; Bower, W.

2000-05-05T23:59:59.000Z

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


141

Progress in Photovoltaic Components and Systems  

DOE Green Energy (OSTI)

The Photovoltaic Manufacturing Research and Development project is a government/industry partnership between the US Department of Energy and members of the US photovoltaic (TV) industry. The purpose of the project is to work with industry to improve manufacturing processes, reduce manufacturing costs, and improve the performance of PV products. This project is conducted through phased solicitations with industry participants selected through a competitive evaluation process. Starting in 1995, the two most recent solicitations include manufacturing improvements for balance-of-system (BOS) components, energy storage, and PV system design improvements. This paper surveys the work accomplished since that time, as well as BOS work currently in progress in the PV Manufacturing R and D project to identify areas of continued interest and product trends. Industry participants continue to work to improve inverters and to expand the features and capabilities of this key component. The industry also continues to advance fully integrated systems that meet standards for performance and safety. All participants included manufacturing improvements to reduce costs and improve reliability. Accomplishments of the project's participants are summarized to illustrate the product and manufacturing trends.

THOMAS,H.; KROPOSKI,B.; WITT,C.; BOWER,WARD I.

2000-07-15T23:59:59.000Z

142

Solar Ready Buildings Planning Guide  

SciTech Connect

This guide offers a checklist for building design and construction to enable installation of solar photovoltaic and heating systems at some time after the building is constructed.

Lisell, L.; Tetreault, T.; Watson, A.

2009-12-01T23:59:59.000Z

143

Exact Sizing of Battery Capacity for Photovoltaic Systems  

E-Print Network (OSTI)

Exact Sizing of Battery Capacity for Photovoltaic Systems Yu Rua , Jan Kleisslb , Sonia Martinezb a study battery sizing for grid-connected photovoltaic (PV) systems. In our setting, PV generated, it is stored in a battery (as long as the battery is not fully charged), which has a fixed maximum charging

Martínez, Sonia

144

A variable voltage MPPT control method for photovoltaic generation system  

Science Conference Proceedings (OSTI)

To increase the output efficiency of a photovoltaic (PV) generation system it is important to have an efficient maximum power point tracking (MPPT) technique. This paper describes the analysis, design and implementation of an efficient tracking method ... Keywords: maximum power point tracking (MPPT), photovoltaic generation system, pulse-width-modulation (PWM), solar energy, variable voltage

Liu Liqun; Wang Zhixin

2009-04-01T23:59:59.000Z

145

A ten year review of performance of photovoltaic systems  

DOE Green Energy (OSTI)

This paper presents data compiled by the Photovoltaic Design Assistance Center at Sandia National Laboratories from more than eighty field tests performed at over thirty-five photovoltaic systems in the United States during the last ten years. The recorded performance histories, failure rates, and degradation of post-Block IV modules and balance-of-system (BOS) components are described in detail.

Rosenthal, A.L.; Durand, S.J. [Southwest Technology Development Inst., Las Cruces, NM (United States); Thomas, M.G. [Sandia National Labs., Albuquerque, NM (United States)

1993-06-01T23:59:59.000Z

146

The Impacts of Utility Rates and Building Type on the Economics...  

Open Energy Info (EERE)

Photovoltaic Systems Jump to: navigation, search Impacts of Regional Electricity Prices and Building Type on the Economics of Commercial Photovoltaic Systems1 Authors:Sean...

147

Photovoltaic systems in remote locations: an experience summary  

Science Conference Proceedings (OSTI)

Since 1979, the NASA Lewis Research Center has been responsible for the design, installation and operational support of 58 photovoltaic systems located in 27 countries. Together these systems contain 77.1 kW of photovoltaic modules and provide power for a variety of loads ranging from single low-power street light systems to a utility type power system for a village of over 150 people. Systems installation, reliability, operation, maintenance and repair experience is given and major problems areas are listed. Experience indicates that photovoltaic system technology is a proven technology, but that developing countries need to better posture themselves to acquire and utilize the technology. Recommendations are given.

Ratajczak, A.F.

1985-01-01T23:59:59.000Z

148

Low-cost, Modular, Building-integrated Photovoltaic-Thermal ...  

Home » CU » Marketing Summaries. Site Map; Printable Version; Share this resource. About; Search; Categories (15) Advanced Materials; Biomass and Biofuels; Building ...

149

Photovoltaic system performance assessment for 1988  

SciTech Connect

The Southwest Region Experiment Station staff analyzed the performance, operation, and maintenance of five flat-plate photovoltaic plants for the calendar year 1988. These plants are: city of Austin's single-axis tracking system in Austin, Texas; the ARCO Solar, Inc., two-axis tracking system near Hesperia, California; Sacramento Municipal Utility District's (SMUD) PV1 and PV2 single-axis tracking systems in Sacramento County, California; Florida Power Corporation's Solar Progress fixed-tilt amorphous silicon PV array in Orlando, Florida; and Detroit Edison's fixed-tilt amorphous silicon system in Rochester, Michigan. The performance of each system was determined from hourly data recorded by the data acquisition system at each site. This means that the system performance presented in this report is dependent on the availability and accuracy of the data acquisition system. System operators provided operation, maintenance, and repair data. These activities were categorized and unscheduled operation and maintenance costs were determined. When possible, the performance and reliability of these systems are compared with prior years' performance to provide a long-term perspective on the operation of PV systems. 17 refs., 100 figs., 117 tabs.

Rosenthal, A.L. (Southwest Technology Development Inst., Las Cruces, NM (USA))

1990-01-01T23:59:59.000Z

150

Photovoltaic systems concept study. Final report  

DOE Green Energy (OSTI)

The following appendices are included: economic theory, electric utilities, and peak load pricing; evaluating the total cost of an on-site solar energy system; derivation of PEPS cost model; PEPS economic analysis model; scenarios; the effect of governmental ''subsidies'' on the nuclear power industry; discussion of energy industry subsidies; extension of the Hottel-Whillier-Bliss model to the analysis of combined photovoltaic/thermal flat plate collectors; analysis of solar-augmented rock-bed/heat pump system; TRNSYS results for Washington, D.C. residence with air collectors, rock-bed storage, and parallel Airesearch heat pump; tabulation of electrical loads for Phoenix, Riverside, and Cleveland using a simplified hourly method; evaporative air coolers; cooling efficiency and electrical consumption; and Hoover Dam operation. (MHR)

Not Available

1977-04-01T23:59:59.000Z

151

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

E-Print Network (OSTI)

area of photovoltaic and other clean energy technologies.Energy recently hosted a day-long public workshop on the variability of photovoltaic (photovoltaic power plants into the utility system. Nicholas Miller is Director, Energy

Mills, Andrew

2010-01-01T23:59:59.000Z

152

Electricity Bill Savings from Residential Photovoltaic Systems...  

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

analysis and environmental impacts department, energy markets, photovoltaics, renewable energy: policy, tariff design Attachment Size Report PDF 1.13 MB Presentation PDF 478.3...

153

Transmission System Performance Analysis for High-Penetration Photovoltaics  

DOE Green Energy (OSTI)

This study is an assessment of the potential impact of high levels of penetration of photovoltaic (PV) generation on transmission systems. The effort used stability simulations of a transmission system with different levels of PV generation and load.

Achilles, S.; Schramm, S.; Bebic, J.

2008-02-01T23:59:59.000Z

154

Whole Building Ventilation Systems  

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

Whole-Building Whole-Building Ventilation Systems for Existing Homes © 2011 Steven Winter Associates, Inc. All rights reserved. © 2011 Steven Winter Associates, Inc. All rights reserved. Home Performance / Weatherization  Addressing ventilation is the exception  Max tightness, e.g. BPI's "Building Airflow Standard" (BAS)  References ASHRAE 62-89  BAS = Max [0.35 ACH, 15 CFM/person], CFM50 eq.  If BD tests show natural infiltration below BAS...  Ventilation must be recommended or installed.  SO DON'T AIR SEAL TO MUCH! © 2011 Steven Winter Associates, Inc. All rights reserved. © 2011 Steven Winter Associates, Inc. All rights reserved. Ventilation Requirements Ventilation systems for existing homes that are:

155

Evaluating Future Standards and Codes with a Focus on High Penetration Photovoltaic (HPPV) System Deployment (Poster)  

DOE Green Energy (OSTI)

Poster displaying solutions for evaluating future standards and codes for high penetration photovoltaic (HPPV) systems.

Coddington, M.; Kroposki, B.; Basso, T.; Lynn, K.

2010-12-01T23:59:59.000Z

156

Photovoltaic energetic system: design and implementation  

Science Conference Proceedings (OSTI)

The increasing cost of the grid electric energy and the decreasing costs of the photovoltaic panels and accessories make the reason for many individuals and businesses to seriously take into consideration the solar power solution. In this paper we present ... Keywords: automatic, control, efficiency, energy, exposure, off-grid, optimization, photovoltaic, tracking

Lucian Milea; Orest Oltu; Claudius Teodorescu; Verona Muntean; Marius Stoian

2008-07-01T23:59:59.000Z

157

Operational results from the Saudi Solar Village Photovoltaic power system  

Science Conference Proceedings (OSTI)

The world's largest photovoltaic power system was carried into the operation phase a few months ago. This system was developed and fabricated in the United States and it is providing electrical energy to three remote villages in Saudi Arabia. The facility includes a 350 kW photovoltaic array, 1-MW diesel powered generator, 1100 kWH lead acid batteries, a 300 KVA inverter and a solar weather data monitoring station. The photovoltaic power system is capable of completely automatic operation. It is designed to operate in stand-alone and cogeneration modes of operation.

Huraib, F.; Al-Sani, A.; Khoshami, B.H.

1982-08-01T23:59:59.000Z

158

Photovoltaic power systems and the National Electrical Code: Suggested practices  

DOE Green Energy (OSTI)

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

Wiles, J. [New Mexico State Univ., Las Cruces, NM (United States). Southwest Technology Development Inst.

1996-12-01T23:59:59.000Z

159

Building and Fire Publications  

Science Conference Proceedings (OSTI)

... Keywords: roofs; building integrated photovoltaics; photovoltaic cells; renewable energy; single-crystalline; solar energy Abstract: ...

160

Photovoltaic and solar-thermal technologies in residential building codes, tackling building code requirements to overcome the impediments to applying new technologies  

SciTech Connect

This report describes the building code requirements and impediments to applying photovoltaic (PV) and solar-thermal technologies in residential buildings (one- or two-family dwellings). It reviews six modern model building codes that represent the codes to be adopted by most locations in the coming years: International Residential Code, First Draft (IRC), International Energy Conservation Code (IECC), International Mechanical Code (IMC), International Plumbing Code (IPC), International Fuel Gas Code (IFGC), and National Electrical Code (NEC). The IRC may become the basis for many of the building codes in the United States after it is released in 2000, and it references the other codes that will also likely become applicable at that time. These codes are reviewed as they apply to photovoltaic systems in buildings and building-integrated photovoltaic systems and to active-solar domestic hot-water and space-heating systems. The first discussion is on general code issues that impact the s e technologies-for example, solar access and sustainability. Then, secondly, the discussion investigates the relationship of the technologies to the codes, providing examples, while keeping two major issues in mind: How do the codes treat these technologies as building components? and Do the IECC and other codes allow reasonable credit for the energy impacts of the technologies? The codes can impact the implementation of the above technologies in several ways: (1) The technology is not mentioned in the codes. It may be an obstacle to implementing the technology, and the solution is to develop appropriate explicit sections or language in the codes. (2) The technology is discussed by the codes, but the language is confusing or ambiguous. The solution is to clarify the language. (3) The technology is discussed in the codes, but the discussion is spread over several sections or different codes. Practitioners may not easily find all of the relevant material that should be considered. The so lution is to put all relevant information in one section or to more clearly reference relevant sections. (4) The technology is prohibited by the code. Examples of this situation were not found. However, energy credit for some technologies cannot be achieved with the requirements of these codes. Finally, four types of future action are recommended to make the codes reviewed in this report more accommodating to renewable energy technologies: (1) Include suggested language additions and changes in the codes; (2) Create new code sections that place all of the requirements for a technology in one section of an appropriate code; (3) Apply existing standards, as appropriate, to innovative renewable energy and energy conservation technologies; and (4) Develop new standards, as necessary, to ease code compliance. A synergy may be possible in developing suitable code language changes for both photovoltaic and solar hot-water systems. The installation of rooftop photovoltaic panels and solar hot- water collectors involves many overlapping issues. Roof loading, weather tightness, mounting systems, roof penetrations, and similar concerns are identical for both technologies. If such work can be coordinated, organizations supporting both technologies could work together to implement the appropriate revisions and additions to the codes.

Wortman, D.; Echo-Hawk, L. [authors] and Wiechman, J.; Hayter, S.; Gwinner, D. [eds.

1999-10-04T23:59:59.000Z

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


161

A novel fault diagnosis method based-on modified neural networks for photovoltaic systems  

Science Conference Proceedings (OSTI)

The main purpose of this paper is to propose an intelligent fault diagnostic method for photovoltaic (PV) systems. First, Solar Pro software package was used to simulate a photovoltaic system for gathering power generation data of photovoltaic modules ... Keywords: extension theory, fault diagnosis, matter-element model, neural networks, photovoltaic (PV) system

Kuei-Hsiang Chao; Chao-Ting Chen; Meng-Hui Wang; Chun-Fu Wu

2010-06-01T23:59:59.000Z

162

Mandatory Photovoltaic System Cost Estimate | Department of Energy  

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

Mandatory Photovoltaic System Cost Estimate Mandatory Photovoltaic System Cost Estimate Mandatory Photovoltaic System Cost Estimate < Back Eligibility Utility Savings Category Solar Buying & Making Electricity Program Info State Colorado Program Type Line Extension Analysis Provider Colorado Public Utilities Commission At the request of a customer or a potential customer, Colorado electric utilities are required to conduct a cost comparison of a photovoltaic (PV) system to any proposed distribution line extension if the customer or potential customer provides the utility with load data (estimated monthly kilowatt-hour usage) requested by the utility to conduct the comparison, and if the customer's or potential customer's peak demand is estimated to be less than 25 kilowatts (kW). In performing the comparison analysis, the

163

Experiences and Lessons Learned With Residential Photovoltaic Systems  

Science Conference Proceedings (OSTI)

This report documents experiences with 86-grid-connected residential photovoltaic (PV) systems located at three sites. This information is valuable to utilities in planning their use of distributed PV generation.

1991-08-08T23:59:59.000Z

164

Case Studies of Grid-Connected Photovoltaic Systems, Vol. 2  

Science Conference Proceedings (OSTI)

The photovoltaic (PV) industry is growing rapidly, and PV power is likely to become an increasingly significant source of distributed generation as its cost declines over the next ten years. This report documents a number of grid-connected photovoltaic case studies covering a broad range of system configurations and project types. The report provides field experience useful to improve the design of future PV systems and identifies problems that need to be addressed to promote the integration of PV power ...

2003-03-25T23:59:59.000Z

165

Case Studies of Grid-Connected Photovoltaic Systems, Volume 3  

Science Conference Proceedings (OSTI)

The photovoltaics industry is growing rapidly, and photovoltaic (PV) power is likely to become an increasingly significant source of distributed generation as its cost declines over the next ten years. This report completes a series of three volumes documenting more than a dozen grid-connected PV case studies in all and covering a broad range of system configurations and project types. The report provides field experience useful to improve the design of future PV systems and identifies problems that need...

2004-03-30T23:59:59.000Z

166

Photovoltaic System Performance Assessment for 1988  

Science Conference Proceedings (OSTI)

Performance data from five utility-grade photovoltaic power plants demonstrate not only that plants generally operate well but also that recent designs have resolved problems afflicting earlier installations.

1990-01-08T23:59:59.000Z

167

Flat-Plate Photovoltaic System Basics | Department of Energy  

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

Flat-Plate Photovoltaic System Basics Flat-Plate Photovoltaic System Basics Flat-Plate Photovoltaic System Basics August 20, 2013 - 4:03pm Addthis The most common photovoltaic (PV) array design uses flat-plate PV modules or panels. These panels can be fixed in place or allowed to track the movement of the Illustration of a cutaway of a typical flat-plate module. The layers, in order from top to bottom, are: cover film, solar cell, encapsulant, substrate, cover film, seal, gasket, and frame. One typical flat-plate module design uses a substrate of metal, glass, or plastic to provide structural support in the back; an encapsulant material to protect the cells; and a transparent cover of plastic or glass. sun. They respond to sunlight that is direct or diffuse. Even in clear skies, the diffuse component of sunlight accounts for between 10% and 20%

168

SOLERAS - Photovoltaic Power Systems Project. Photovoltaic power seminar, February 20-23, 1983. Final report  

Science Conference Proceedings (OSTI)

A 350 kW concentrator photovoltaic system has been developed in Saudi Arabia. This system is described, both as an overall facility and for the major components related to solar energy collection, conversion, storage, and delivery. Components include the array subsystem, power conditioning, and energy storage. The theory of operation is discussed for the system, as well as system control and data acquisition and solar data collection. The plan for compiling data to evaluate the system's performance is given. (LEW)

Not Available

1983-01-01T23:59:59.000Z

169

Collaborative Systems for Building Automation  

Science Conference Proceedings (OSTI)

This paper describes the use of new generation of PLC's and WinCC software in creating collaborative systems for managing, controlling and supervising building electric equipment. These systems assure all the requirements of a building and offer to the ... Keywords: Building Automation System, PLC, WinCC, Redundancy, HVAC, HAS, SCADA, HMI

Ioan Valentin Sita

2012-09-01T23:59:59.000Z

170

Simulation and simplified design studies of photovoltaic systems  

DOE Green Energy (OSTI)

Results of TRNSYS simulations of photovoltaic systems with electrical storage are described. Studies of the sensitivity of system performance, in terms of the fraction of the electrical load supplied by the solar energy system, to variables such as array size, battery size, location, time of year, and load shape are reported. An accurate simplified method for predicting array output of max-power photovoltaic systems is presented. A second simplified method, which estimates the overall performance of max-power systems, is developed. Finally, a preliminary technique for predicting clamped-voltage system performance is discussed.

Evans, D.L.; Facinelli, W.A.; Koehler, L.P.

1980-09-01T23:59:59.000Z

171

Commissioning Building Systems for Improved Energy ...  

Science Conference Proceedings (OSTI)

Commissioning Building Systems for Improved Energy Performance Project. Summary: NIST will advance commercial building ...

2012-12-17T23:59:59.000Z

172

Reliability of Rechargeable Batteries in a Photovoltaic Power Supply System  

DOE Green Energy (OSTI)

We investigate the reliability If a rechargeable battery acting as the energy storage component in a photovoltaic power supply system. A model system was constructed for this that includes the solar resource, the photovoltaic power supp Iy system, the rechargeable battery and a load. The solar resource and the system load are modeled as SI ochastic processes. The photovoltaic system and the rechargeable battery are modeled deterministically, imd an artificial neural network is incorporated into the model of the rechargeable battery to simulate dartage that occurs during deep discharge cycles. The equations governing system behavior are solved simultaneously in the Monte Carlo framework and a fwst passage problem is solved to assess system reliability.

Barney, P.; Jungst, R.G., Ingersoll, D.; O'Gorman, C.; Paez, T.L.; Urbina, A.

1998-11-30T23:59:59.000Z

173

Performance model assessment for multi-junction concentrating photovoltaic systems.  

DOE Green Energy (OSTI)

Four approaches to modeling multi-junction concentrating photovoltaic system performance are assessed by comparing modeled performance to measured performance. Measured weather, irradiance, and system performance data were collected on two systems over a one month period. Residual analysis is used to assess the models and to identify opportunities for model improvement. Large photovoltaic systems are typically developed as projects which supply electricity to a utility and are owned by independent power producers. Obtaining financing at favorable rates and attracting investors requires confidence in the projected energy yield from the plant. In this paper, various performance models for projecting annual energy yield from Concentrating Photovoltaic (CPV) systems are assessed by comparing measured system output to model predictions based on measured weather and irradiance data. The results are statistically analyzed to identify systematic error sources.

Stein, Joshua S.; Riley, Daniel M.; McConnell, Robert. (Amonix, Inc., Seal Beach, CA); Sahm, Aaron (University of Nevada, Las Vegas, NV); Crawford, Clark (Amonix, Inc., Seal Beach, CA); King, David L.; Cameron, Christopher P.; Foresi, James S. (Emcore, Inc., Albuquerque, NM)

2010-03-01T23:59:59.000Z

174

Building Technologies Office: Building-Level Energy Management Systems  

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

Building-Level Energy Building-Level Energy Management Systems Research Project to someone by E-mail Share Building Technologies Office: Building-Level Energy Management Systems Research Project on Facebook Tweet about Building Technologies Office: Building-Level Energy Management Systems Research Project on Twitter Bookmark Building Technologies Office: Building-Level Energy Management Systems Research Project on Google Bookmark Building Technologies Office: Building-Level Energy Management Systems Research Project on Delicious Rank Building Technologies Office: Building-Level Energy Management Systems Research Project on Digg Find More places to share Building Technologies Office: Building-Level Energy Management Systems Research Project on AddThis.com... About Take Action to Save Energy

175

Standards for photovoltaic energy conversion systems. Final report  

DOE Green Energy (OSTI)

This report provides the results of a search for existing domestic standards and related documents for possible application in the development of a standards base for photovoltaic energy conversion systems. The search resulted in locating about 150 test methods, recommended practices, standards, solar-thermal performance criteria, and other standards-related documents. They are listed by topic areas in the appendix. The listing was prepared to assist those involved in developing performance criteria for photovoltaic systems and in identifying methods to test system performance against these criteria. It is clear from the results of the search that few standards are directly applicable to terrestrial solar photovoltaic systems and that much standards development is required to support the commercialization of such systems.

Schafft, H. A.

1980-04-01T23:59:59.000Z

176

Detailed Performance Model for Photovoltaic Systems: Preprint  

DOE Green Energy (OSTI)

This paper presents a modified current-voltage relationship for the single diode model. The single-diode model has been derived from the well-known equivalent circuit for a single photovoltaic cell. The modification presented in this paper accounts for both parallel and series connections in an array.

Tian, H.; Mancilla-David, F.; Ellis, K.; Muljadi, E.; Jenkins, P.

2012-07-01T23:59:59.000Z

177

INTERNATIONAL ENERGY AGENCY PHOTOVOLTAIC POWER SYSTEMS PROGRAMME  

E-Print Network (OSTI)

that provide necessary weather data to compute solar radiation quantities. This survey of solar databases efforts which accelerate the development and deployment of photovoltaic solar energy as a significant SUMMARY Solar radiation at ground level is a necessary input for performances modeling and sizing of PV

178

Original article: Power flow Petri Net modelling for building integrated multi-source power system with smart grid interaction  

Science Conference Proceedings (OSTI)

This paper presents an energy management modelling of a multi-source power system composed of photovoltaic (PV) array, storage and power grid connection, and taking into account messages from smart grid. The designed system can supply a tertiary building ... Keywords: Energy management, Petri Net modelling, Photovoltaic, Smart grid, Stateflow

B. C. Wang, M. Sechilariu, F. Locment

2013-05-01T23:59:59.000Z

179

Solar photovoltaic systems for residences in the Northeast  

DOE Green Energy (OSTI)

Under sponsorship of the US Department of Energy, MIT Lincoln Laboratory is conducting a program to develop residential solar photovoltaic (PV) systems. The first phase of this activity involves the design, construction and testing of four prototype systems at the Northeast Residential Experiment Station. The systems employ roof-mounted photovoltaic arrays of 500 to 800 square feet which provide solar-generated electricity sufficient to cut in half the electrical demand of an energy-efficient, passive-solar residence. Construction of these systems will be complete by December 1980, and will be followed by a one-year test period.

Russell, M.C.

1980-01-01T23:59:59.000Z

180

Next-Generation Distributed Power Management for Photovoltaic Systems  

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

Next-Generation Distributed Power Management for Photovoltaic Systems Next-Generation Distributed Power Management for Photovoltaic Systems Speaker(s): Jason Stauth Date: July 29, 2011 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Steven Lanzisera In recent years, the balance of systems (BOS) side of photovoltaic (PV) energy has become a major focus in the effort to drive solar energy towards grid parity. The power management architecture has expanded to include a range of distributed solutions, including microinverters and 'micro' DC-DC converters to solve problems with mismatch (shading), expand networking and control, and solve critical BOS issues such as fire safety. This talk will introduce traditional and distributed approaches for PV systems, and will propose a next-generation architecture based on a new

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


181

Performance model assessment for multi-junction concentrating photovoltaic systems.  

DOE Green Energy (OSTI)

Four approaches to modeling multi-junction concentrating photovoltaic system performance are assessed by comparing modeled performance to measured performance. Measured weather, irradiance, and system performance data were collected on two systems over a one month period. Residual analysis is used to assess the models and to identify opportunities for model improvement.

Riley, Daniel M.; McConnell, Robert. (Amonix, Inc., Seal Beach, CA); Sahm, Aaron (University of Nevada, Las Vegas, NV); Crawford, Clark (Amonix, Inc., Seal Beach, CA); King, David L.; Cameron, Christopher P.; Foresi, James S. (Emcore, Inc., Albuquerque, NM)

2010-03-01T23:59:59.000Z

182

Building Energy Information Systems: User Case Studies  

E-Print Network (OSTI)

Web based enterprise energy and building automation systems.operations. Energy and Buildings, 33(8), 10. Heinemeier,from an analysis of building Energy Information System

Granderson, Jessica

2010-01-01T23:59:59.000Z

183

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

Open Energy Info (EERE)

be certified to UL-1703 standards Start Date 06062011 Installation Requirements All solar photovoltaic system installations must obtain appropriate local building permits and...

184

Near-optimal, dynamic module reconfiguration in a photovoltaic system to combat partial shading effects  

Science Conference Proceedings (OSTI)

Partial shading is a serious obstacle to effective utilization of photovoltaic (PV) systems since it can result in significant output power degradation for the system. A PV system is organized as a series connection of PV modules, each module comprising ... Keywords: dynamic programming, partial shading, photovoltaic module reconfiguration, photovoltaic system

Xue Lin; Yanzhi Wang; Siyu Yue; Donghwa Shin; Naehyuck Chang; Massoud Pedram

2012-06-01T23:59:59.000Z

185

Application of smart grid in photovoltaic power systems, ForskEL...  

Open Energy Info (EERE)

of smart grid in photovoltaic power systems, ForskEL (Smart Grid Project) Jump to: navigation, search Project Name Application of smart grid in photovoltaic power systems, ForskEL...

186

Operation o Solar Photovoltaic-Thermal (PVT) Hybrid System in KIER  

E-Print Network (OSTI)

The details of the Photovoltaic Thermal (PVT) hybrid air heating system, UTC air heating system and its effect on the performance of photovoltaic (PV) module and room temperature in KIER are explained in this paper. Two identical test rooms were constructed such that one had unglazed transpired collector on its south facing wall while other had no solar wall. The temperature inside the room with UTC was 10-20oC higher than the temperature inside the room without UTC on a typical winter day. In second set of experiments, 75W PV modules were installed on the south facing walls of each test rooms. The temperature of the PV module with UTC was 5-9?lower than the PV module without UTC resulting in a 6% recovery of output electrical power under the forced ventilation. PVT hybrid system may alleviate burden on conventional energy consumption in Korea for heating the buildings and electricity generation.

Naveed, A.T.; Lee, E. J.; Kang, E. C.

2006-01-01T23:59:59.000Z

187

Software system for simulation of electric power processes in photovoltaic-hybrid system  

Science Conference Proceedings (OSTI)

The software system for modeling and simulation of the processes of electric power conversion in Photovoltaic-hybrid energy system is described. The electrical models and characteristics of photovoltaic generator and other system components are included ... Keywords: PV-hybrid system, electric power simulation, programme models

Katerina Gabrovska; Andreas Wagner; Nikolay Mihailov

2004-06-01T23:59:59.000Z

188

Building Technology and Urban Systems  

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

Office building exterior and infrared thermograph Office building exterior and infrared thermograph Building Technology and Urban Systems Building Technology and Urban Systems application/pdf icon btus-org-chart-03-2013.pdf In the areas of Building Technology and Urban Systems, EETD researchers conduct R&D and develop physical and information technologies to make buildings and urban areas more energy- and resource-efficient. These technologies create jobs and products for the marketplace in clean technology industries. They improve quality of life, and reduce the emissions of pollutants, including climate-altering greenhouse gases. BTUSD's goal is to provide the technologies needed to operate buildings at 50 to 70 percent less energy use than average today. BTUS develops, demonstrates and deploys: Information technologies for the real-time monitoring and control of

189

Durability of Polymeric Encapsulation Materials for Concentrating Photovoltaic Systems (Presentation)  

DOE Green Energy (OSTI)

Presented at the 7th International Conference on Concentrating Photovoltaic Systems (CPV-7), 4-6 April 2011, Las Vegas, Nevada. Many concentrating photovoltaic (CPV) systems use a polymeric encapsulant to couple an optical component and/or coverglass to the cell. In that location, the encapsulation improves the transmission of concentrated optical flux through interfaces(s) while protecting the cell from the environment. The durability of encapsulation materials, however, is not well established relative to the desired service life of 30 years. Therefore, we have initiated a screen test to identify the field-induced failure modes for a variety of popular PV encapsulation materials.

Miller, D. C.; Muller, M.; Kempe, M. D.; Araki, K.; Kennedy, C. E.; Kurtz, S. R.

2011-04-01T23:59:59.000Z

190

SURVEILLANCE OF PHOTOVOLTAIC SOLAR ENERGY SYSTEMS USING METEOSAT DERIVED IRRADIANCES  

E-Print Network (OSTI)

which allow for a cheap and reliable check of the power production of grid connected PV systems. These checks are done by calculating the estimated output of the PV system with a simulation-model. The model Utrecht ABSTRACT In this paper, we describe a surveillance procedure for grid connected photovoltaic (PV

Heinemann, Detlev

191

Sustainable Building Rating Systems Summary  

SciTech Connect

The purpose of this document is to offer information that could be used to compare and contrast sustainable building rating systems.

Fowler, Kimberly M.; Rauch, Emily M.

2006-07-01T23:59:59.000Z

192

Environmental Assessment of Photovoltaic Systems and Effectiveness Analysis  

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

Environmental Assessment of Photovoltaic Systems and Effectiveness Analysis Environmental Assessment of Photovoltaic Systems and Effectiveness Analysis of U.S. Renewable Energy Policies Speaker(s): Pei Zhai Date: October 25, 2010 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Chris Marnay This presentation mainly covers two perspectives relevant to solar energy technologies. The first one is the environmental aspect. The questions to be answered are how "green" photovoltaic technology is (embodied energy and carbon are two main indicators); and, how have these two indicators evolved during the past 10 years. The methodology for analysis is a hybrid Life Cycle Assessment. The second part involves a policy analysis of the effectiveness of U.S. renewable energy policies, such as state-level Renewable Portfolio Standards, for supporting solar energy adoption. A

193

Controlling of grid connected photovoltaic lighting system with fuzzy logic  

SciTech Connect

In this study, DC electrical energy produced by photovoltaic panels is converted to AC electrical energy and an indoor area is illuminated using this energy. System is controlled by fuzzy logic algorithm controller designed with 16 rules. Energy is supplied from accumulator which is charged by photovoltaic panels if its energy would be sufficient otherwise it is supplied from grid. During the 1-week usage period at the semester time, 1.968 kWh energy is used from grid but designed system used 0.542 kWh energy from photovoltaic panels at the experiments. Energy saving is determined by calculations and measurements for one education year period (9 months) 70.848 kWh. (author)

Saglam, Safak; Ekren, Nazmi; Erdal, Hasan [Technical Education Faculty, Marmara University, Istanbul 34722 (Turkey)

2010-02-15T23:59:59.000Z

194

Photovoltaic systems concept study. Final report. Volume I  

DOE Green Energy (OSTI)

Conceptual system designs were developed for three sizes of photovoltaic solar electric power systems: a single family residence, a central station power plant, and two on-site intermediate systems (shopping center and commercial retrofit). A brief system description and a summary of primary performance and economic characteristics are included for each of the three system designs. Principal conclusions for each are highlighted and overall system comparisons and recommendations are set forth. (MHR)

Not Available

1977-04-01T23:59:59.000Z

195

Distributed Generation System Characteristics and Costs in the Buildings  

Gasoline and Diesel Fuel Update (EIA)

1.6 mb) 1.6 mb) Appendix A - Photovoltaic (PV) Cost and Performance Characteristics for Residential and Commercial Applications (1.0 mb) Appendix B - The Cost and Performance of Distributed Wind Turbines, 2010-35 (0.5 mb) Distributed Generation System Characteristics and Costs in the Buildings Sector Release date: August 7, 2013 Distributed generation in the residential and commercial buildings sectors refers to the on-site generation of energy, often electricity from renewable energy systems such as solar photovoltaics (PV) and small wind turbines. Many factors influence the market for distributed generation, including government policies at the local, state, and federal level, and project costs, which vary significantly depending on time, location, size, and application.

196

Implementing Solar Photovoltaic Projects on Historic Buildings and in Historic Districts  

SciTech Connect

Despite a global recession, the number of photovoltaic (PV) installations in the United States grew 30% from 2008 to 2009. A number of trends point toward continued growth of new PV installations. The efficiency of solar panels is increasing, while installation costs are going down. At the same time, federal, state, and local regulations are requiring that greater amounts of energy must come from renewable sources. Incentives for solar power technology implementation are being created and regulatory barriers removed. Corporations and governments are focusing on solar power to demonstrate leadership in environmental sustainability and resource conservation. Architects and builders are including PV arrays as a way to meet green building standards and property owners are seeking PV as a way to reduce their utility bills, as well as their carbon footprints. This publication focuses on the implementation of PV systems on historic properties. Many private property owners, as well as local, state, and national government entities, are seeking guidance on how best to integrate solar PV installations on historic buildings. Historic preservationists maintain that preserving, reusing, and maintaining historic structures is a key sustainable design strategy while also recognizing the importance of accommodating renewable energy technologies where they are appropriate. In some cases, however, conflicts have arisen over the installation of PV panels on historic properties. Addressing these conflicts and providing guidance regarding solutions and best practices is an important step toward resolving or eliminating barriers. Historic properties and districts in the United States provide tangible connections to the nation's past. Thousands of buildings, sites, districts, structures, and objects have been recognized for their historic and architectural significance. Local, state, and national designations of historic properties provide recognition, protection, and incentives that help to preserve those properties for future generations. At the national level, the National Register of Historic Places includes more than 86,000 listings, which encompass a total of more than 1.6 million historic resources. State registers of historic places also provide recognition and protection for historic sites and districts. Locally, more than 2,400 communities have established historic preservation ordinances. Typically implemented through zoning overlays, these local land use regulations manage changes to hundreds of thousands of historic properties. Over a period of 2 years (2007 and 2008) the U.S. Department of Energy (DOE) designated 25 major U.S. cities as Solar America Cities. DOE provided financial and technical assistance to help the cities develop comprehensive approaches to accelerate the adoption of solar energy technologies. The Solar America Cities partnerships represent the foundation of DOE's larger Solar America Communities program. As a part of this program, DOE identified the implementation of solar projects on historic properties and in historic districts as one area to address. A workshop titled 'Implementing Solar Projects on Historic Buildings and in Historic Districts' was held in Denver, Colorado, in June of 2010. Participants included representatives from the solar industry as well as historic preservationists from nonprofit organizations and government agencies at the local, state, and national levels. The workshop provided an opportunity to gain a common understanding of solar technologies and historic preservation procedures and priorities. The workshop participants also discussed some of the challenges involved in locating PV systems on historic properties and identified potential solutions. This publication is based on the discussions that occurred at this workshop and the recommendations that were developed by participants. Ideas expressed by participants in the workshop, and included in this document, do not necessarily reflect the opinion of any government council, agency, or entity.

Kandt, A.; Hotchkiss, E.; Walker, A.

2011-01-01T23:59:59.000Z

197

ENERGY MODELING OF A LEAD-ACID BATTERY WITHIN HYBRID WIND / PHOTOVOLTAIC SYSTEMS  

E-Print Network (OSTI)

ENERGY MODELING OF A LEAD-ACID BATTERY WITHIN HYBRID WIND / PHOTOVOLTAIC SYSTEMS O. GERGAUD, G Abstract: Within the scope of full-scale energy modeling of a hybrid wind / photovoltaic system coupled / photovoltaic production system coupled to the network grid (with energy storage) ENERGY MODELING OF A LEAD

Paris-Sud XI, Université de

198

PV Standards Work: Photovoltaic System and Component Certification, Test Facility Accreditation, and Solar Photovoltaic Energy Systems International Standards  

DOE Green Energy (OSTI)

This paper discusses efforts led by two companies (PowerMark Corporation and Sunset Technologies Inc.) to support both U.S. domestic and international photovoltaic (PV) system and component certification and test facility accreditation programs and the operation of the International Electrotechnical Commission (IEC) Technical Committee 82 (TC-82) Photovoltaic Energy Systems. International and national PV certification/accreditation programs are successfully facilitating entry of only the highest quality PV products into the marketplace. Standards also continue to be a cornerstone for assuring global PV product conformity assessment, reducing non-tariff trade barriers, and ultimately improving PV products while lowering cost.

Basso, T. S.; Chalmers, S.; Barikmo, H. O.

2005-11-01T23:59:59.000Z

199

Design and performance of the Georgia Tech Aquatic Center photovoltaic system. Final report  

DOE Green Energy (OSTI)

A building-integrated DC PV array has been constructed on the Georgia Tech campus. The array is mounted on the roof of the Georgia Tech Aquatic Center (GTAC), site of the aquatic events during the 1996 Paralympic and Olympic Games in Atlanta. At the time of its construction, it was the world`s largest roof-mounted photovoltaic array, comprised of 2,856 modules and rates at 342 kW. This section describes the electrical and physical layout of the PV system, and the associated data acquisition system (DAS) which monitors the performance of the system and collects measurements of several important meteorological parameters.

Rohatgi, A.; Begovic, M.; Long, R.; Ropp, M.; Pregelj, A.

1996-12-31T23:59:59.000Z

200

Building Communication System: Takenaka's M2M Platform for Building...  

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

called "Building Communication System". This seminar introduces its system architecture and some implementation cases, including energy data visualization, demand...

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


201

Solar photovoltaic applications seminar: design, installation and operation of small, stand-alone photovoltaic power systems  

DOE Green Energy (OSTI)

This seminar material was developed primarily to provide solar photovoltaic (PV) applied engineering technology to the Federal community. An introduction to photoconductivity, semiconductors, and solar photovoltaic cells is included along with a demonstration of specific applications and application identification. The seminar details general systems design and incorporates most known information from industry, academia, and Government concerning small solar cell power system design engineering, presented in a practical and applied manner. Solar PV power system applications involve classical direct electrical energy conversion and electric power system analysis and synthesis. Presentations and examples involve a variety of disciplines including structural analysis, electric power and load analysis, reliability, sizing and optimization; and, installation, operation and maintenance. Four specific system designs are demonstrated: water pumping, domestic uses, navigational and aircraft aids, and telecommunications. All of the applications discussed are for small power requirement (under 2 kilowatts), stand-alone systems to be used in remote locations. Also presented are practical lessons gained from currently installed and operating systems, problems at sites and their resolution, a logical progression through each major phase of system acquisition, as well as thorough design reviews for each application.

Not Available

1980-07-01T23:59:59.000Z

202

Survey of U.S. Line-Connected Photovoltaic Systems  

Science Conference Proceedings (OSTI)

More than 200 line-connected photovoltaic (PV) systems are now operating in 27 states, totaling more than 11 MW. Experiences at these installations provide background for utility examination of PV technology as an opportunity for pollution-free generation, demand-side management, and potential business investment.

1989-03-15T23:59:59.000Z

203

Performance of amorphous silicon photovoltaic systems, 1985--1989  

DOE Green Energy (OSTI)

This report discusses the performance of commercial amorphous silicon modules used in photovoltaic power systems from 1985 through 1989. Topics discussed include initial degradation, reliability, durability, and effects of temperature and solar irradiance on peak power and energy production. 6 refs., 18 figs.

Not Available

1990-04-01T23:59:59.000Z

204

Assessment of photovoltaic application on a residential building in Gävle, Sweden.  

E-Print Network (OSTI)

?? The paper presents a PV-based electricity generation system of residential building located at Norra Fiskargatan in Gävle, Sweden, and aims to examine the environmental… (more)

Wang, Kangkang

2013-01-01T23:59:59.000Z

205

Studies of Photovoltaic Roofing Systems at Wind Engineering and Fluids Laboratory at Colorado State University  

E-Print Network (OSTI)

Studies of Photovoltaic Roofing Systems at Wind Engineering and Fluids Laboratory at Colorado State of photovoltaic technology to generate electricity. Various innovative systems incorporating photovoltaic panels and Fluids Laboratory (WEFL) at Colorado State University (CSU, www.windlab.colostate.edu) have been involved

206

Technical interactions between distributed photovoltaic systems and low-voltage grids  

Science Conference Proceedings (OSTI)

In the European Research Program ICOP DEMO 4080-98 there was installed a photovoltaic system of 10kWp made of 66 photovoltaic modules model OPTISOL SFM 72 Bx made by Pilkington Solar International and 24 ST 40 modules made by SIEMENS at the University ... Keywords: distributed generation, harmonic analysis, low-voltage grids, photovoltaic system, quality parameters, renewable energy

Traian Daniel Ivanovici; Marcel Ionel; Mihail-Florin Stan; Valentin Dogaru-Ulieru; Ioan Corneliu Salisteanu

2010-12-01T23:59:59.000Z

207

Dynamic reconfiguration of photovoltaic energy harvesting system in hybrid electric vehicles  

Science Conference Proceedings (OSTI)

Photovoltaic (PV) energy harvesting system is a promising energy source for battery replenishment in hybrid electric vehicles (HEVs.) The PV cell array is installed on different parts of a vehicle body such as the engine hood, door panels, and the roof ... Keywords: dynamic programming., hybrid electric vehicle, photovoltaic array reconfiguration, photovoltaic system

Yanzhi Wang; Xue Lin; Naehyuck Chang; Massoud Pedram

2012-07-01T23:59:59.000Z

208

BOSS: building operating system services  

Science Conference Proceedings (OSTI)

Commercial buildings are attractive targets for introducing innovative cyber-physical control systems, because they are already highly instrumented distributed systems which consume large quantities of energy. However, they are not currently programmable ...

Stephen Dawson-Haggerty, Andrew Krioukov, Jay Taneja, Sagar Karandikar, Gabe Fierro, Nikita Kitaev, David Culler

2013-04-01T23:59:59.000Z

209

Cybernetic Building Systems Programs and Projects  

Science Conference Proceedings (OSTI)

... Achieving national goals of net zero energy buildings requires substantial reduction in the energy consumption of commercial building systems. ...

2010-05-24T23:59:59.000Z

210

Integrated Building Management System (IBMS)  

SciTech Connect

This project provides a combination of software and services that more easily and cost-effectively help to achieve optimized building performance and energy efficiency. Featuring an open-platform, cloud- hosted application suite and an intuitive user experience, this solution simplifies a traditionally very complex process by collecting data from disparate building systems and creating a single, integrated view of building and system performance. The Fault Detection and Diagnostics algorithms developed within the IBMS have been designed and tested as an integrated component of the control algorithms running the equipment being monitored. The algorithms identify the normal control behaviors of the equipment without interfering with the equipment control sequences. The algorithms also work without interfering with any cooperative control sequences operating between different pieces of equipment or building systems. In this manner the FDD algorithms create an integrated building management system.

Anita Lewis

2012-07-01T23:59:59.000Z

211

Sandia photovoltaic systems definition and application experiment projects  

DOE Green Energy (OSTI)

A compilation is given of the abstracts and visual material used in presentation at the Fourth Photovoltaic Systems Definition and Applications Projects Integration Meeting held at the Marriott Hotel, April 12-14, 1983, in Albuquerque, New Mexico. The meeting provided a forum for detailed analyses on recently completed and current activities. These activities include systems research, balance-of-system technology development, residential experimentation, and evaluation of intermediate-sized applications.

Jones, G.

1983-04-01T23:59:59.000Z

212

Retrofit Installation of a Residential Photovoltaic Power System  

Science Conference Proceedings (OSTI)

Photovoltaic (PV) systems offer great potential for utility customers to supplement centrally supplied power. However, because these systems are still quite novel, the process of gaining approval for and installing them is unfamiliar and not standardized at most utility companies. Therefore, it can prove sufficiently challenging that it presents a barrier to would-be PV owners. This report looks at that process as it applied to a residential system in Phoenix, Arizona, and proposes ways that the process ...

2003-03-19T23:59:59.000Z

213

National System Templates: Building Sustainable National Inventory...  

Open Energy Info (EERE)

National System Templates: Building Sustainable National Inventory Management Systems Jump to: navigation, search Tool Summary Name: National System Templates: Building Sustainable...

214

Optimized low-cost-array field designs for photovoltaic systems  

DOE Green Energy (OSTI)

As manager of the US Department of Energy Photovoltaic Systems Definition Project, Sandia National Laboratories is engaged in a comprehensive program to define and develop array field subsystems which can achieve the lowest possible lifecycle costs. The major activity of this program is described, namely, the design and development of optimized, modular array fields for photovoltaic (PV) systems. As part of this activity, design criteria and performance requirements for specific array subsystems including support structures, foundations, intermodule connections, field wiring, lightning protection, system grounding, site preparation, and monitoring and control have been defined and evaluated. Similarly, fully integrated flat-panel array field designs, optimized for lowest lifecycle costs, have been developed for system sizes ranging from 20 to 500 kW/sub p/. Key features, subsystem requirements, and projected costs for these array field designs are presented and discussed.

Post, H.N.; Carmichael, D.C.; Castle, J.A.

1982-01-01T23:59:59.000Z

215

Extremum seeking control techniques applied to photovoltaic systems with multimodal power curves  

E-Print Network (OSTI)

) Current(A) 0 200 320025 I-V curve P-V curve VMPP Power(W) 1000 Fig. 1. Photovoltaic cell I-V and P generator method, open-circuit voltage photovoltaic cell test method, incremental conductance method (CI) [5Extremum seeking control techniques applied to photovoltaic systems with multimodal power curves

Recanati, Catherine

216

Maximum Power Point Tracking Control for Photovoltaic System Using Adaptive Neuro-Fuzzy  

E-Print Network (OSTI)

converter. II. MATHEMATICAL MODELING OF PHOTOVOLTAIC CELL A PV cell can be represented by an equivalentMaximum Power Point Tracking Control for Photovoltaic System Using Adaptive Neuro- Fuzzy "ANFIS availability and vast potential, world has turned to solar photovoltaic energy to meet out its ever increasing

Recanati, Catherine

217

Single-stage dual priority regulator for photovoltaic systems  

DOE Green Energy (OSTI)

In this paper the design and application of a voltage regulator for use in Photovoltaic Systems with two separate loads of different priority is presented. The Single-Stage Dual Priority Regulator (SSDPR) charges two separate battery systems for high and low priority loads. The controller always charges the main battery first. It toggles between the two batteries when the main battery is nearly charged, and reduces the charge duty cycle of the main battery as it approaches full charge. The SSDPR utilizes the PV more efficiently by supplying low priority loads without jeopardizing the reliability of the critical load. Both the main and auxiliary voltage settings are adjustable, allowing the use of different types of batteries. The SDPR is being tested in the University of Lowell Vaccine Refrigerator Laboratory. A dual priority regulator is useful in any stand-alone system with multiple loads. Uses include photovoltaic powered homes, medical clinics, and recreational vehicles.

Salameh, Z.M.; Lynch, W.A. (Univ. of Massachusetts, Lowell (United States))

1992-01-01T23:59:59.000Z

218

Performance, problems, and expectations of concentrator photovoltaic systems  

DOE Green Energy (OSTI)

The photovoltaic cell or solar cell can be used to convert sunlight directly into electrical energy and its relatively simple construction and absence of moving parts make these devices attractive for terrestrial power generation applications. The primary problem preventing large-scale application is the very high cost of solar cell arrays. For example, the most advanced solar cell is the silicon cell and, currently in the United States, silicon solar arrays cost about $15,000 per peak kilowatt in moderately large quantities. One approach to reducing the cost of solar cell arrays is to concentrate sunlight on the cells and increase the specific output power density of the cells. In this approach, expensive solar cell area is replaced by, hopefully, less expensive reflective or refractive concentrator materials. The United States Energy Research and Development Administration (ERDA) is supporting a program to develop concentrator photovoltaic systems with the primary objective to develop low-cost reliable systems for widespread terrestrial applications. The specific long-term cost goal for these systems is $500 per peak kilowatt by 1982. The most promising solar cell systems for concentrator applications are silicon and galium arsenide and these materials have received the most attention to date in the ERDA program. Design, preliminary performance testing results, and cost estimates for concentrator photovoltaic systems are discussed.

Burgess, E.L.

1977-01-01T23:59:59.000Z

219

Photovoltaic Resources and Technologies | Department of Energy  

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

Photovoltaic Resources and Technologies Photovoltaic Resources and Technologies Photovoltaic Resources and Technologies October 7, 2013 - 9:22am Addthis Graphic of the eTraining logo Training Available Selecting, Implementing, and Funding Photovoltaic Systems in Federal Facilities: Learn how to select, implement, and fund a photovoltaic system by taking this FEMP eTraining course. This page provides a brief overview of photovoltaic (PV) technologies supplemented by specific information to apply PV within the Federal sector. Overview Photovoltaic cells convert sunlight into electricity. Systems typically include a PV module or array made of individual PV cells installed on or near a building or other structure. A power inverter converts the direct current (DC) electricity produced by the PV cells to alternative current

220

DESIGN AND CONSTRUCTION EVALUATION OF A PHOTOVOLTAIC DC LED LIGHTING SYSTEM.  

E-Print Network (OSTI)

??The market demand for commercialization of Photovoltaic (PV) systems depends a lot on the reliability, efficiency and performance of various components within the system. PV… (more)

Bhamidipati, Jyotsna

2008-01-01T23:59:59.000Z

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


221

Implementations of electric vehicle system based on solar energy in Singapore : assessment of solar photovoltaic systems  

E-Print Network (OSTI)

To evaluate the feasibility of solar energy based Electric Vehicle Transportation System in Singapore, the state of the art Photovoltaic Systems have been reviewed in this report with a focus on solar cell technologies. ...

Sun, Li

2009-01-01T23:59:59.000Z

222

Building Technologies Office: Energy Systems Innovations  

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

Energy Systems Energy Systems Innovations to someone by E-mail Share Building Technologies Office: Energy Systems Innovations on Facebook Tweet about Building Technologies Office: Energy Systems Innovations on Twitter Bookmark Building Technologies Office: Energy Systems Innovations on Google Bookmark Building Technologies Office: Energy Systems Innovations on Delicious Rank Building Technologies Office: Energy Systems Innovations on Digg Find More places to share Building Technologies Office: Energy Systems Innovations on AddThis.com... About Take Action to Save Energy Partner With DOE Activities Solar Decathlon Building America Research Innovations Research Tools Building Science Education Climate-Specific Guidance Solution Center Partnerships Meetings Publications Home Energy Score

223

Cost Analysis of a Concentrator Photovoltaic Hydrogen Production System  

SciTech Connect

The development of efficient, renewable methods of producing hydrogen are essential for the success of the hydrogen economy. Since the feedstock for electrolysis is water, there are no harmful pollutants emitted during the use of the fuel. Furthermore, it has become evident that concentrator photovoltaic (CPV) systems have a number of unique attributes that could shortcut the development process, and increase the efficiency of hydrogen production to a point where economics will then drive the commercial development to mass scale.

Thompson, J. R.; McConnell, R. D.; Mosleh, M.

2005-08-01T23:59:59.000Z

224

A Sliding Mode Multimodel Control for a Sensorless Photovoltaic System  

E-Print Network (OSTI)

In this work we will talk about a new control test using the sliding mode control with a nonlinear sliding mode observer, which are very solicited in tracking problems, for a sensorless photovoltaic panel. In this case, the panel system will has as a set point the sun position at every second during the day for a period of five years; then the tracker, using sliding mode multimodel controller and a sliding mode observer, will track these positions to make the sunrays orthogonal to the photovoltaic cell that produces more energy. After sunset, the tracker goes back to the initial position (which of sunrise). Experimental measurements show that this autonomic dual axis Sun Tracker increases the power production by over 40%.

Rhif, Ahmed; Braiek, Naceur BenHadj

2013-01-01T23:59:59.000Z

225

A novel hybrid (wind-photovoltaic) system sizing procedure  

SciTech Connect

Wind-photovoltaic hybrid system (WPHS) utilization is becoming popular due to increasing energy costs and decreasing prices of turbines and photovoltaic (PV) panels. However, prior to construction of a renewable generation station, it is necessary to determine the optimum number of PV panels and wind turbines for minimal cost during continuity of generated energy to meet the desired consumption. In fact, the traditional sizing procedures find optimum number of the PV modules and wind turbines subject to minimum cost. However, the optimum battery capacity is either not taken into account, or it is found by a full search between all probable solution spaces which requires extensive computation. In this study, a novel description of the production/consumption phenomenon is proposed, and a new sizing procedure is developed. Using this procedure, optimum battery capacity, together with optimum number of PV modules and wind turbines subject to minimum cost can be obtained with good accuracy. (author)

Hocaoglu, Fatih O. [Afyon Kocatepe University, Dept. of Electronics and Communication Eng., 03200 Afyonkarahisar (Turkey); Gerek, Oemer N.; Kurban, Mehmet [Anadolu University, Dept. of Electrical and Electronics Eng., 26555 Eskisehir (Turkey)

2009-11-15T23:59:59.000Z

226

A Sliding Mode Multimodel Control for a Sensorless Photovoltaic System  

E-Print Network (OSTI)

In this work we will talk about a new control test using the sliding mode control with a nonlinear sliding mode observer, which are very solicited in tracking problems, for a sensorless photovoltaic panel. In this case, the panel system will has as a set point the sun position at every second during the day for a period of five years; then the tracker, using sliding mode multimodel controller and a sliding mode observer, will track these positions to make the sunrays orthogonal to the photovoltaic cell that produces more energy. After sunset, the tracker goes back to the initial position (which of sunrise). Experimental measurements show that this autonomic dual axis Sun Tracker increases the power production by over 40%.

Ahmed Rhif; Zohra Kardous; Naceur BenHadj Braiek

2013-01-12T23:59:59.000Z

227

Models used to assess the performance of photovoltaic systems.  

DOE Green Energy (OSTI)

This report documents the various photovoltaic (PV) performance models and software developed and utilized by researchers at Sandia National Laboratories (SNL) in support of the Photovoltaics and Grid Integration Department. In addition to PV performance models, hybrid system and battery storage models are discussed. A hybrid system using other distributed sources and energy storage can help reduce the variability inherent in PV generation, and due to the complexity of combining multiple generation sources and system loads, these models are invaluable for system design and optimization. Energy storage plays an important role in reducing PV intermittency and battery storage models are used to understand the best configurations and technologies to store PV generated electricity. Other researcher's models used by SNL are discussed including some widely known models that incorporate algorithms developed at SNL. There are other models included in the discussion that are not used by or were not adopted from SNL research but may provide some benefit to researchers working on PV array performance, hybrid system models and energy storage. The paper is organized into three sections to describe the different software models as applied to photovoltaic performance, hybrid systems, and battery storage. For each model, there is a description which includes where to find the model, whether it is currently maintained and any references that may be available. Modeling improvements underway at SNL include quantifying the uncertainty of individual system components, the overall uncertainty in modeled vs. measured results and modeling large PV systems. SNL is also conducting research into the overall reliability of PV systems.

Stein, Joshua S.; Klise, Geoffrey T.

2009-12-01T23:59:59.000Z

228

Photovoltaic System Performance Basics | Department of Energy  

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

the system is therefore dependent on the performance of its components. Reliability The reliability of PV arrays is an important factor in the cost of PV systems and in consumer...

229

Joint DOE/industry photovoltaic system reliability program  

DOE Green Energy (OSTI)

To achieve the lowest life-cycle cost (LCC), photovoltaic (PV) systems must have the optimum mix of low first cost, low operation and maintenance (O&M) cost, and high availability. Additionally, the long-term health of the photovoltaic (PV) industry requires that PV systems work as expected. Although PV modules now enjoy high reliability due to a significant multi-year effort by both the U.S. Department of Energy (DOE) and industry, the same is not always true of PV systems. Even for systems that do operate reliably, customers, suppliers, and manufacturers can benefit from knowing what O&M expenses to expect. This knowledge will reduce technology risk to the customer and improve likelihood of commitment to PV projects. System integrators and utilities may benefit from O&M cost information to improve system designs, to properly price service agreements and warranties, and to optimize maintenance strategies. The DOE and component manufacturers may benefit from identifying cost drivers to optimally focus research and quality assurance resources to improve product reliability. This paper discusses the first of five tasks identified for this project, quantifying system reliability and life cycle cost by collecting, analyzing and reporting data on PV system reliability and cost. Industry participants collect the necessary O&M data on systems they are monitoring. Sandia provides support in the form of assistance identifying data that needs to be collected, helping develop forms or databases to collect the data, and analyzing the data.

Maish, A.B.; Atcitty, C. [Sandia National Labs., NM (United States); Hester, S. [Utility Photo Voltaic Group, Washington, DC (United States)] [and others

1997-06-01T23:59:59.000Z

230

ANNUAL REPORT 1998 PHOTOVOLTAICS GROUP  

E-Print Network (OSTI)

RESEARCH COUNCIL Cover Photo: Wind, Solar Powered Car & Building (G8 Building at Birmingham, Photo Courtesy ENGINEERING) Photovoltaics Group School of Electrical Engineering University of New South Wales Sydney NSW ELECTRICITY INDUSTRY RESTRUCTURING & REGULATION 24 SYSTEM HARDWARE AND PERFORMANCE MONITORING 24 EDUCATION

231

Evaluation of 11 kW Photovoltaic System Coupled with Energy Storage at Wisconsin Public Service  

Science Conference Proceedings (OSTI)

This report is a case study of the Dispatchable Photovoltaic Peak Shaving System in operation at a ShopKo facility in Green Bay, Wisconsin.

2004-04-29T23:59:59.000Z

232

The Impact of Retail Rate Structures on the Economics of Commercial Photovoltaic Systems in California  

E-Print Network (OSTI)

Rate Structures on the Economics of Commercial Photovoltaic Systems in California Prepared for the National Renewable Energy Laboratory Golden, Colorado and

Wiser, Ryan; Mills, Andrew; Barbose, Galen; Golove, William

2007-01-01T23:59:59.000Z

233

New results in forecasting of photovoltaic systems output based on solar radiation forecasting  

Science Conference Proceedings (OSTI)

Accurate short term forecasting of photovoltaic (PV) systems output has a great significance for fast development of PV parks in South-East Europe

Laurentiu Fara

2013-01-01T23:59:59.000Z

234

An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California  

E-Print Network (OSTI)

Market Value of Residential Solar PV. Journal of SustainableConclusions The market for solar PV is expanding rapidly ingrid-connected solar photovoltaic (PV) energy systems were

Hoen, Ben

2011-01-01T23:59:59.000Z

235

The Impact of Retail Rate Structures on the Economics of Commercial Photovoltaic Systems in California  

E-Print Network (OSTI)

Markets. Rowlands, I. 2005. “Solar PV Electricity and Market2003. “Maximizing PV Peak Shaving with Solar Load Control:sited photovoltaic (PV) systems, solar will likely need to

Wiser, Ryan; Mills, Andrew; Barbose, Galen; Golove, William

2007-01-01T23:59:59.000Z

236

Costs Drop for Photovoltaic Power Systems  

Science Conference Proceedings (OSTI)

Oct 23, 2009 ... The cost reduction over time was largest for smaller PV systems, such as those used to power individual households. Also, installed costs show ...

237

Dynamic characteristics and graphic monitoring design of photovoltaic energy conversion system  

Science Conference Proceedings (OSTI)

This study explored the dynamic characteristics and monitoring design of the photovoltaic energy conversion system, which is a system model of an independent power supply. This study first established the non-linear differential equation of the system ... Keywords: dynamic characteristics, eigenvalue, monitoring system, photovoltaic, programmable logic controller, solar cell

Kuo-Hua Liu

2011-08-01T23:59:59.000Z

238

Photovoltaic battery & charge controller market & applications survey. An evaluation of the photovoltaic system market for 1995  

DOE Green Energy (OSTI)

Under the sponsorship of the Department of Energy, Office of Utility Technologies, the Battery Analysis and Evaluation Department and the Photovoltaic System Assistance Center of Sandia National Laboratories (SNL) initiated a U.S. industry-wide PV Energy Storage System Survey. Arizona State University (ASU) was contracted by SNL in June 1995 to conduct the survey. The survey included three separate segments tailored to: (a) PV system integrators, (b) battery manufacturers, and (c) PV charge controller manufacturers. The overall purpose of the survey was to: (a) quantify the market for batteries shipped with (or for) PV systems in 1995, (b) quantify the PV market segments by battery type and application for PV batteries, (c) characterize and quantify the charge controllers used in PV systems, (d) characterize the operating environment for energy storage components in PV systems, and (e) estimate the PV battery market for the year 2000. All three segments of the survey were mailed in January 1996. This report discusses the purpose, methodology, results, and conclusions of the survey.

Hammond, R.L.; Turpin, J.F.; Corey, G.P. [and others] [and others

1996-12-01T23:59:59.000Z

239

Building America Systems Integration Research Annual Report:...  

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

Systems Integration Research Annual Report: FY 2012 Prepared for: Building America Building Technologies Program Office of Energy Efficiency and Renewable Energy U.S....

240

Building Energy Information Systems: User Case Studies  

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

Office EETD Safety Program Development Contact Us Department Contacts Media Contacts Building Energy Information Systems: User Case Studies Title Building Energy Information...

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


241

TRANSPORTATION SYSTEMS Transportation systems are the building  

E-Print Network (OSTI)

TRANSPORTATION SYSTEMS Transportation systems are the building blocks of modern society. Efficient mobility improves the quality of life. However, transportation systems by their very nature also affect quality. The transportation systems graduate pro- gram provides in-depth knowledge on the design

Wang, Yuhang

242

Development of an FPGA-based system for real-time simulation of photovoltaic modules  

Science Conference Proceedings (OSTI)

Photovoltaic (PV) simulators are indispensable for the operational evaluation of PV energy production system components (e.g. battery chargers, DC/AC inverters, etc.), in order to avoid the time-consuming and expensive field-testing process. In this ... Keywords: DC/DC converter, Field programmable gate array, Photovoltaic system, Rapid system prototyping, Simulator

Eftichios Koutroulis; Kostas Kalaitzakis; Vasileios Tzitzilonis

2009-07-01T23:59:59.000Z

243

System Advisor Model: Flat Plate Photovoltaic Performance Modeling Validation Report  

SciTech Connect

The System Advisor Model (SAM) is a free software tool that performs detailed analysis of both system performance and system financing for a variety of renewable energy technologies. This report provides detailed validation of the SAM flat plate photovoltaic performance model by comparing SAM-modeled PV system generation data to actual measured production data for nine PV systems ranging from 75 kW to greater than 25 MW in size. The results show strong agreement between SAM predictions and field data, with annualized prediction error below 3% for all fixed tilt cases and below 8% for all one axis tracked cases. The analysis concludes that snow cover and system outages are the primary sources of disagreement, and other deviations resulting from seasonal biases in the irradiation models and one axis tracking issues are discussed in detail.

Freeman, J.; Whitmore, J.; Kaffine, L.; Blair, N.; Dobos, A. P.

2013-12-01T23:59:59.000Z

244

Installation system for integral mounting of thermal or photovoltaic panels  

Science Conference Proceedings (OSTI)

A unique installation system for mounting solar thermal or photovoltaic solar collector panels as an integral part of a structure is described. The most common example would have the collector array replacing the sheathing and shingles of a roof supported by trusses or rafters on 24 inch centers. The design achieves the goals of a good integral installation which is reliably weathertight, rapid and easy to execute by typical construction workers with little specific extra training and no special tools. All materials and components are commercially available and have proven performance.

Rost, D.F. (Solar Energy Engineering, Poland, OH); Ameduri, G.; Groves, L.

1981-01-01T23:59:59.000Z

245

Building Integrated PV System at Lahaina Civic Center Gymnasium Complex, Maui, Hawaii (MECO)  

Science Conference Proceedings (OSTI)

A 1.2kW building integrated photovoltaic system was designed by Maui Electric Company Ltd (MECO) and installed at the Lahaina Civic Center Gymnasium on the island of Maui, Hawaii. The BIPV structure serves as an extension to an existing covered walkway. The system is powered by the photovoltaic modules and the energy is stored in four gel cell type batteries. An entryway structure was constructed to house the system equipment, an LED display sign and lighted message board. A parking lot light is also pow...

2004-05-03T23:59:59.000Z

246

Feasibility Study for Photovoltaics, Wind, solar Hot Water and Hybrid Systems  

DOE Green Energy (OSTI)

Southwestern Indian Polytechnic Institute (SIPI) located in Albuquerque New Mexico is a community college that serves American Indians and Alaska Natives. SIPI’s student body represents over 100 Native American Tribes. SIPI completed a renewable energy feasibility study program and established renewable energy hardware on the SIPI campus, which supplements and creates an educational resource to teach renewable energy courses. The SIPI campus is located, and has as student origins, areas, in which power is an issue in remote reservations. The following hardware was installed and integrated into the campus facilities: small wind turbine, large photovoltaic array that is grid-connected, two photovoltaic arrays, one thin film type, and one polycrystalline type, one dual-axis active tracker and one passive tracker, a hot air system for heating a small building, a portable hybrid photovoltaic system for remote power, and a hot water system to preheat water used in the SIPI Child Care facility. Educational curriculum has been developed for two renewable energy courses one being the study of energy production and use, and especially the roles renewable energy forms like solar, wind, geothermal, hydro, and biomass plays, and the second course being a more advanced in-depth study of renewable energy system design, maintenance, installation, and applications. Both courses rely heavily on experiential learning techniques so that installed renewable energy hardware is continuously utilized in hand-on laboratory activities and are part of the Electronics program of studies. Renewable energy technologies and science has also been included in other SIPI programs of study such as Environmental Science, Natural Resources, Agriculture, Engineering, Network Management, and Geospatial Technology.

Hooks, Ronald; Montoya, Valerie

2008-03-26T23:59:59.000Z

247

Sustainable Energy Science and Engineering Center Photovoltaic Systems Engineering  

E-Print Network (OSTI)

of photovoltaic conversion of solar energy into electricity. The objective of Task 1 of the IEA Photovoltaic Power will take place at the Ben-Gurion National Solar Energy Center, on the Sede Boqer Campus of Ben at Underwriters Laboratories, Inc., USA "Photovoltaics: Standards and qualification" Andreas W. Bett Materials

Krothapalli, Anjaneyulu

248

ECE 414A/514A Photovoltaic Solar Energy Systems  

E-Print Network (OSTI)

, and development of photovoltaic cells and it is expected to continue into the foreseeable future. This trend management optics. The physical limits on photovoltaic cell performance and practical device operation will be analyzed. The main device emphasis will focus on different types of silicon photovoltaic cells including

Arizona, University of

249

Integrated Building Energy Systems Design Considering Storage  

E-Print Network (OSTI)

the fact that the off-peak power plant might be coal and substitute "clean" on- peak natural gas plants@lbl.gov Keywords Combined heat and power, CO2 emissions, demand response, electric storage, energy efficiency, heat storage, micro-generation systems, photovoltaic, software, solar thermal systems Abstract The addition

250

Comparison of Photovoltaic Models in the System Advisor Model: Preprint  

DOE Green Energy (OSTI)

The System Advisor Model (SAM) is free software developed by the National Renewable Energy Laboratory (NREL) for predicting the performance of renewable energy systems and analyzing the financial feasibility of residential, commercial, and utility-scale grid-connected projects. SAM offers several options for predicting the performance of photovoltaic (PV) systems. The model requires that the analyst choose from three PV system models, and depending on that choice, possibly choose from three module and two inverter component models. To obtain meaningful results from SAM, the analyst must be aware of the differences between the model options and their applicability to different modeling scenarios. This paper presents an overview the different PV model options and presents a comparison of results for a 200-kW system using different model options.

Blair, N. J.; Dobos, A. P.; Gilman, P.

2013-08-01T23:59:59.000Z

251

Photovoltaic-electrodialysis regeneration method for liquid desiccant cooling system  

Science Conference Proceedings (OSTI)

Liquid desiccant cooling system (LDCS) is an (a novel) air-conditioning system with good energy saving potential. Regenerator is the power centre for LDCS. Currently, the regeneration process is always fuelled by thermal energy. Nevertheless, this regeneration pattern has some disadvantages in that its performance will become poor when the surrounding atmosphere is of high humidity, and the heat provided for regeneration will be unfavourable to the following dehumidification process. To ameliorate that, a new regeneration method is proposed in this paper: a membrane regenerator is employed to regenerate the liquid desiccant in an electrodialysis way; while solar photovoltaic generator is adopted to supply electric power for this process. Analysis has been made about this new regeneration method and the result reveals: this new manner achieves good stability with the immunity against the adverse impact from the outside high humidity; its performance is much higher than that of the thermal regeneration manner while putting aside the low efficiency of the photovoltaic system. Besides, purified water can be obtained in company with the regeneration process. (author)

Li, Xiu-Wei [College of Power Engineering, Nanjing University of Science and Technology, Nanjing 210094 (China); Zhang, Xiao-Song [School of Energy and Environment, Southeast University, Nanjing 210096 (China)

2009-12-15T23:59:59.000Z

252

The comparison of three photovoltaic system designs using the photovoltaic reliability and performance model (PV-RPM).  

SciTech Connect

Most photovoltaic (PV) performance models currently available are designed to use irradiance and weather data and predict PV system output using a module or array performance model and an inverter model. While these models can give accurate results, they do so for an idealized system. That is, a system that does not experience component failures or outages. We have developed the Photovoltaic Reliability and Performance Model (PV-RPM) to more accurately model these PV systems by including a reliability component that simulates failures and repairs of the components of the system, as well as allow for the disruption of the system by external events such as lightning or grid disturbances. In addition, a financial component has also been included to help assess the profitability of a PV system.

Miller, Steven P.; Granata, Jennifer E.; Stein, Joshua S.

2012-12-01T23:59:59.000Z

253

Photovoltaic Power Generation  

E-Print Network (OSTI)

This report is an overview of photovoltaic power generation. The purpose of the report is to provide the reader with a general understanding of photovoltaic power generation and how PV technology can be practically applied. There is a brief discussion of early research and a description of how photovoltaic cells convert sunlight to electricity. The report covers concentrating collectors, flat-plate collectors, thin-film technology, and building-integrated systems. The discussion of photovoltaic cell types includes single-crystal, poly-crystalline, and thin-film materials. The report covers progress in improving cell efficiencies, reducing manufacturing cost, and finding economic applications of photovoltaic technology. Lists of major manufacturers and organizations are included, along with a discussion of market trends and projections. The conclusion is that photovoltaic power generation is still more costly than conventional systems in general. However, large variations in cost of conventional electrical power, and other factors, such as cost of distribution, create situations in which the use of PV power is economically sound. PV power is used in remote applications such as communications, homes and villages in developing countries, water pumping, camping, and boating. Gridconnected applications such as electric utility generating facilities and residential rooftop installations make up a smaller but more rapidly expanding segment of PV use. Furthermore, as technological advances narrow the cost gap, more applications are becoming economically feasible at an accelerating rate. iii TABLE OF CONTENTS LIST OF TABLES AND FIGURES ...................................................................................v

Tom Penick; Gale Greenleaf Instructor; Thomas Penick; Bill Louk; Bill Louk

1998-01-01T23:59:59.000Z

254

FPGA-based implementation of an intelligent simulator for stand-alone photovoltaic system  

Science Conference Proceedings (OSTI)

Modelling and simulation of stand-alone photovoltaic (SAPV) systems (PV module, battery, regulator, etc.) in real time is crucial for the control, the supervision, the diagnosis and for studying their performances. In this paper, an intelligent simulator ... Keywords: FPGA, MLP, Photovoltaic system, VHDL, intelligent simulator

A. Mellit; H. Mekki; A. Messai; H. Salhi

2010-08-01T23:59:59.000Z

255

A Control Strategy for Off-Grid Solar Photovoltaic Power System Based on MPPT Algorithm  

Science Conference Proceedings (OSTI)

Off-grid solar photovoltaic (PV) power system characteristics are used widely in many far-away areas during theses years. The new control strategy employs Maximum Power Point Tracking (MPPT) algorithm. The maximum power point tracker is a high efficiency ... Keywords: off-grid solar photovoltaic power system, maximum power point tracking algorithm, perturbation and observation control method

Tianjian Wang; Xia Dang; Dong Liu

2012-10-01T23:59:59.000Z

256

Dynamic Reconfiguration of Photovoltaic Energy Harvesting System in Hybrid Electric Vehicles  

E-Print Network (OSTI)

Dynamic Reconfiguration of Photovoltaic Energy Harvesting System in Hybrid Electric Vehicles Yanzhi, xuelin, pedram}@usc.edu, 2 {naehyuck}@elpl.snu.ac.kr ABSTRACT Photovoltaic (PV) energy harvesting system is a promising energy source for battery replenishment in hybrid electric vehicles (HEVs.) The PV cell array

Pedram, Massoud

257

Analysis of photovoltaic/thermal electric power plant systems  

DOE Green Energy (OSTI)

A conceptual definition and performance evaluation of a 100 megawatt (MW) hybrid photovoltaic/thermal electric power plant has been carried out. The concept utilizes the ability of gallium arsenide photovoltaic cells to achieve high conversion efficiency at high incident fluxes and elevated temperatures. Solar energy is focused by a field of steerable mirrors (heliostats) onto a tower mounted receiver whose outer surface is covered with gallium arsenide (AlGaAs/GaAs) solar cells and whose inner surface is a water boiler. The solar cells convert a fraction of the incident radiation into electrical energy, and the remaining energy is extracted at approximately 200/sup 0/C and used to power a Rankine cycle turbine generator (bottoming cycle). Water is used as the solar cell array coolant, as the thermodynamic working fluid, and as the thermal energy storage medium. Parametric studies were conducted to select conceptual design parameters and operational characteristics which imply the lowest levelized busbar electric energy costs. Parameters varied were collector area, condenser surface area, fan power, ambient temperature, and electric and thermal energy storage capacities. The report describes the concept, outlines the design analysis method, summarizes the parametric study results, and defines the selected plant configuration. The lowest levelized busbar electric energy generation cost, 70 mills/kilowatt-hr., was achieved with a relatively small collector area, 0.8 x 10/sup 6/ square meters, and no stored energy. A rough comparison of this combined power plant with a similar photovoltaic plant, operated at lower solar cell temperature and with no bottoming cycle, showed the busbar cost of electricity (BBEC) from the combined system to be approximately 9% lower.

Gluck, D.F.; Kelley, W.A.

1979-03-01T23:59:59.000Z

258

Technical analysis of prospective photovoltaic systems in Utah.  

SciTech Connect

This report explores the technical feasibility of prospective utility-scale photovoltaic system (PV) deployments in Utah. Sandia National Laboratories worked with Rocky Mountain Power (RMP), a division of PacifiCorp operating in Utah, to evaluate prospective 2-megawatt (MW) PV plants in different locations with respect to energy production and possible impact on the RMP system and customers. The study focused on 2-MW{sub AC} nameplate PV systems of different PV technologies and different tracking configurations. Technical feasibility was evaluated at three different potential locations in the RMP distribution system. An advanced distribution simulation tool was used to conduct detailed time-series analysis on each feeder and provide results on the impacts on voltage, demand, voltage regulation equipment operations, and flicker. Annual energy performance was estimated.

Quiroz, Jimmy Edward; Cameron, Christopher P.

2012-02-01T23:59:59.000Z

259

Deploying High Penetration Photovoltaic Systems: A Case Study  

DOE Green Energy (OSTI)

Photovoltaic (PV) system capacity penetration, or simply 'penetration,' is often defined as the rated power output of the aggregate PV systems on a distribution circuit segment divided by the peak load of that circuit segment. Industry experts agree that a single value defining high penetration is not universally applicable. However, it is generally agreed that a conservative value to designate high penetration is the condition when the ratio of aggregate PV systems ratings to peak load exceeds 15%. This case study illustrates the case of a distribution feeder which is able to accommodate a traditional capacity penetration level of 47%, and perhaps more. New maximum penetration levels need to be defined and verified and enhanced definitions for penetration on a distribution circuit need to be developed. The new penetration definitions and studies will help utility engineers, system developers, and regulatory agencies better agree what levels of PV deployment can be attained without jeopardizing the reliability and power quality of a circuit.

Coddington, M. H.; Baca, D.; Kroposki, B. D.; Basso, T.

2011-01-01T23:59:59.000Z

260

National System Templates: Building Sustainable National Inventory  

Open Energy Info (EERE)

National System Templates: Building Sustainable National Inventory National System Templates: Building Sustainable National Inventory Management Systems Jump to: navigation, search Tool Summary LAUNCH TOOL Name: National System Templates: Building Sustainable National Inventory Management Systems Agency/Company /Organization: United States Environmental Protection Agency, United States Agency for International Development Sector: Energy, Land Focus Area: Non-renewable Energy, Forestry, Agriculture Topics: GHG inventory Resource Type: Guide/manual, Training materials Website: www.epa.gov/climatechange/emissions/ghginventorycapacitybuilding/templ National System Templates: Building Sustainable National Inventory Management Systems Screenshot References: National System Templates: Building Sustainable National Inventory Management Systems[1]

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


261

Evolutionary programming versus artificial immune system in evolving neural network for grid-connected photovoltaic system output prediction  

Science Conference Proceedings (OSTI)

This paper presents the evolutionary neural networks for the prediction of energy output from a grid-connected photovoltaic (GCPV) system. Two evolutionary neural network (ENN) models have been proposed using evolutionary programming and artificial immune ... Keywords: artificial immune system (AIS) and prediction, artificial neural network (ANN), correlation coefficient (R), evolutionary programming (EP), grid-connected photovoltaic system (GCPV), multi-layer feedforward neural network (MLFNN), photovoltaic (PV)

Shahril Irwan Sulaiman; Titik Khawa Abdul Rahman; Ismail Musirin; Sulaiman Shaari

2011-06-01T23:59:59.000Z

262

Analysis of Photovoltaic System Energy Performance Evaluation Method  

SciTech Connect

Documentation of the energy yield of a large photovoltaic (PV) system over a substantial period can be useful to measure a performance guarantee, as an assessment of the health of the system, for verification of a performance model to then be applied to a new system, or for a variety of other purposes. Although the measurement of this performance metric might appear to be straight forward, there are a number of subtleties associated with variations in weather and imperfect data collection that complicate the determination and data analysis. A performance assessment is most valuable when it is completed with a very low uncertainty and when the subtleties are systematically addressed, yet currently no standard exists to guide this process. This report summarizes a draft methodology for an Energy Performance Evaluation Method, the philosophy behind the draft method, and the lessons that were learned by implementing the method.

Kurtz, S.; Newmiller, J.; Kimber, A.; Flottemesch, R.; Riley, E.; Dierauf, T.; McKee, J.; Krishnani, P.

2013-11-01T23:59:59.000Z

263

Interline Photovoltaic (I-PV) power system - A novel concept of power flow control and management  

E-Print Network (OSTI)

This paper presents a new system configuration for a large-scale Photovoltaic (PV) power system with multi-line transmission/distribution networks. A PV power plant is reconfigured in a way that two adjacent power system ...

Khadkikar, Vinod

264

Building Trust & Confidence in Voting Systems  

Science Conference Proceedings (OSTI)

Building Trust & Confidence in Voting Systems, Dec 10-11, 2003. Dec 10, 2003. ... Openness & Security David Dill Stanford University. ...

2012-11-07T23:59:59.000Z

265

Integrating Renewable Energy Systems in Buildings (Presentation)  

SciTech Connect

This presentation on integrating renewable energy systems into building was presented at the August, 2011 ASHRAE Region IX CRC meetings.

Hayter, S. J.

2011-08-01T23:59:59.000Z

266

Building International Emergency Management Systems | National...  

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

Building International Emergency Management Systems | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy...

267

Conceptual design and systems analysis of photovoltaic power systems. Volume II. Systems. Revised final report  

DOE Green Energy (OSTI)

Conceptual designs were made and analyses were performed on three types of solar photovoltaic power systems. Included were Residential (1--10 kW), Intermediate (0.1--10 MW), and Central (50--1000 MW) Power Systems to be installed in the 1985 to 2000 time period. Detailed descriptions of each of the three systems studied, descriptions of the necessary subsystems, and discussions of the interfaces between them are presented. Included also are descriptions of system performance and system cost used to perform an economic analysis which assesses the value of each system.

Pittman, P.F.

1977-03-01T23:59:59.000Z

268

Comparison of energy intake prediction algorithms for systems powered by photovoltaic harvesters  

Science Conference Proceedings (OSTI)

Small size photovoltaic modules can harvest enough energy to power many personal devices and wireless sensor nodes. The prediction of solar energy intake is possible thanks to the periodical availability of the sunlight and its cyclic behavior. Thus, ... Keywords: Energy harvesting, Photovoltaic systems, Power management, Prediction algorithms, Wireless sensor network

Carlo Bergonzini; Davide Brunelli; Luca Benini

2010-11-01T23:59:59.000Z

269

Maximum Power Transfer Tracking for a Photovoltaic-Supercapacitor Energy System  

E-Print Network (OSTI)

the power comes from a renewable source such a solar cell (photovoltaic, or PV for short) or a windmillMaximum Power Transfer Tracking for a Photovoltaic-Supercapacitor Energy System Younghyun Kim optimization from an energy generation source (e.g., a solar cell array) to an energy storage element (e

Pedram, Massoud

270

Keywords: Photovoltaic System, fault-tolerance, recon-figurable PV panel  

E-Print Network (OSTI)

1 Keywords: Photovoltaic System, fault-tolerance, recon- figurable PV panel Photovoltaic (PV plants, and satellites. The output power of a PV cell (also called solar cell) is dependent on the solar irradiance level and temperature. Figure 1 shows PV cell output current-voltage and power

Pedram, Massoud

271

Near-Optimal, Dynamic Module Reconfiguration in a Photovoltaic System to Combat Partial Shading Effects  

E-Print Network (OSTI)

Near-Optimal, Dynamic Module Reconfiguration in a Photovoltaic System to Combat Partial Shading}@elpl.snu.ac.kr, pedram@usc.edu ABSTRACT Partial shading is a serious obstacle to effective utilization of photovoltaic-parallel connected cells. This paper presents modified PV cell structures with integrated switches, imbalanced cell

Pedram, Massoud

272

Absorber and emitter for solar thermo-photovoltaic systems to achieve efficiency  

E-Print Network (OSTI)

Pbs photovoltaic cells," Int. J. Energy Res. 16(6), 481­487 (1992). 7. V. Badescu, "ThermodynamicAbsorber and emitter for solar thermo- photovoltaic systems to achieve efficiency exceeding, provides a sharp emissivity peak at the solar cell band-gap while suppressing emission at lower frequencies

Fan, Shanhui

273

Maximum power point tracking and optimal Li-ion battery charging control for photovoltaic charging system  

Science Conference Proceedings (OSTI)

Due to the severity of the global energy crisis and environmental pollution, the photovoltaic (PV) system has become one kind of important renewable energy source. Solar energy has the advantages of maximum reserve, inexhaustibleness, and is free from ... Keywords: Genetic algorithms (GA), Photovoltaic (PV), Variable Step Size Incremental Conductance method

Her-Terng Yau; Qin-Cheng Liang; Chin-Tsung Hsieh

2012-09-01T23:59:59.000Z

274

Manufacturing injection-moleded Fresnel lens parquets for point-focus concentrating photovoltaic systems  

DOE Green Energy (OSTI)

This project involved the manufacturing of curved-faceted, injection-molded, four-element Fresnel lens parquets for concentrating photovoltaic arrays. Previous efforts showed that high-efficiency (greater than 82%) Fresnel concentrators could be injection molded. This report encompasses the mold design, molding, and physical testing of a four-lens parquet for a solar photovoltaic concentrator system.

Peters, E.M.; Masso, J.D. [AOtec, Southbridge, MA (United States)

1995-10-01T23:59:59.000Z

275

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

SciTech Connect

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

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

2010-06-01T23:59:59.000Z

276

Integrated Building Energy Systems Design Considering Storage Technologies  

E-Print Network (OSTI)

an average efficiency of 0.5 for solar thermal and 0.13 forefficiency, heat storage, micro-generation systems, photovoltaic, software, solar thermal

Stadler, Michael

2009-01-01T23:59:59.000Z

277

Clark County- Solar and Wind Building Permit Guides  

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

Clark County, Nevada has established guides for obtaining building permits for wind and solar photovoltaic (PV) systems for both residential and commercial purposes. The guides outline applicable...

278

SERF photovoltaic systems. Technical report on system performance for the period, August 1, 1994--July 31, 1995  

DOE Green Energy (OSTI)

This report presents an analysis of performance data on the two identical, 6 kW{sub ac}, grid-connected photovoltaic systems located on the roof of the Solar Energy Research Facility building at the National Renewable Energy Laboratory in Golden, Colorado. The data cover the monitoring period August 1, 1994, to July 31, 1995, and the performance parameters analyzed include direct current and alternating current power, aperture-area efficiency, energy, capacity factor, and performance index. These parameters are compared to plane-of-array irradiance, ambient temperature, and back-of-module temperature as a function of time, either daily or monthly. We also obtained power ratings of the systems for data corresponding to different test conditions. This study has shown, in addition to expected seasonal trends, that system monitoring is a valuable tool in assessing performance and detecting faulty equipment. Furthermore, methods applied for this analysis may be used to evaluate and compare systems using cells of different technologies. The systems were both found to be operating at approximately 7% below their estimated rating, which was based on Photovoltaics for Utility-Scale Applications test conditions. This may be attributed to the design inverter efficiency being estimated at 95% compared to measured values of approximately 88%, as well as the fact that aperture-area efficiency that was overestimated at 12.8% compared to a measured value of 11.0%. The continuous monitoring also revealed faulty peak-power point tracking equipment.

Dyk, E.E. van; Strand, T.R.; Hansen, R.

1996-06-01T23:59:59.000Z

279

Description of the University of Texas at Arlington Solar Energy Research Facility photovoltaic/thermal residential system  

DOE Green Energy (OSTI)

The addition of a photovoltaic array to a solar-heated single-family residence at the University of Texas at Arlington permits the study of combined photovoltaic/thermal system operation. Equipment and construction details are presented.

Darkazalli, G.

1979-03-16T23:59:59.000Z

280

Photovoltaic system criteria documents. Volume 2: Quality assurance criteria for photovoltaic applications  

SciTech Connect

Quality assurance criteria are described for manufacturers and installers of solar photovoltaic tests and applications. Quality oriented activities are outlined to be pursued by the contractor/subcontractor to assure the physical and operational quality of equipment produced is included. In the broad sense, guidelines are provided for establishing a QA organization if none exists. Mainly, criteria is provided to be considered in any PV quality assurance plan selected as appropriate by the responsible Field Center. A framework is established for a systematic approach to ensure that photovoltaic tests and applications are constructed in a timely and cost effective manner.

Koenig, J.C.; Billitti, J.W.; Tallon, J.M.

1979-10-01T23:59:59.000Z

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


281

An overview of the DC wiring system design issues in the SMUD Phase I photovoltaic power plant  

Science Conference Proceedings (OSTI)

The DC wiring system of a photovoltaic power requires a number of safety features that result from the unique aspects of photovoltaic devices. This paper presents an overview of the DC wiring system design developed for the Sacramento Municipal Utilities District (SMUD) Phase I photovoltaic power plant. The specific challenges that photovoltaic devices present to a power plant designer are identified along with the specific solutions adopted in the SMUD design.

Rosen, D.; Simburger, E.J.; Sugimura, R.S.

1984-09-01T23:59:59.000Z

282

System for characterizing semiconductor materials and photovoltaic devices through calibration  

DOE Patents (OSTI)

A method and apparatus for measuring characteristics of a piece of material, typically semiconductor materials including photovoltaic devices. The characteristics may include dislocation defect density, grain boundaries, reflectance, external LBIC, internal LBIC, and minority carrier diffusion length. The apparatus includes a light source, an integrating sphere, and a detector communicating with a computer. The measurement or calculation of the characteristics is calibrated to provide accurate, absolute values. The calibration is performed by substituting a standard sample for the piece of material, the sample having a known quantity of one or more of the relevant characteristics. The quantity measured by the system of the relevant characteristic is compared to the known quantity and a calibration constant is created thereby.

Sopori, Bhushan L. (Denver, CO); Allen, Larry C. (Arvada, CO); Marshall, Craig (Littleton, CO); Murphy, Robert C. (Golden, CO); Marshall, Todd (Littleton, CO)

1998-01-01T23:59:59.000Z

283

System for characterizing semiconductor materials and photovoltaic devices through calibration  

DOE Patents (OSTI)

A method and apparatus are disclosed for measuring characteristics of a piece of material, typically semiconductor materials including photovoltaic devices. The characteristics may include dislocation defect density, grain boundaries, reflectance, external LBIC, internal LBIC, and minority carrier diffusion length. The apparatus includes a light source, an integrating sphere, and a detector communicating with a computer. The measurement or calculation of the characteristics is calibrated to provide accurate, absolute values. The calibration is performed by substituting a standard sample for the piece of material, the sample having a known quantity of one or more of the relevant characteristics. The quantity measured by the system of the relevant characteristic is compared to the known quantity and a calibration constant is created thereby. 44 figs.

Sopori, B.L.; Allen, L.C.; Marshall, C.; Murphy, R.C.; Marshall, T.

1998-05-26T23:59:59.000Z

284

Building Technologies Office: Simplified Space Conditioning Systems...  

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

Simplified Space Conditioning Systems for Energy Efficient Homes Expert Meeting to someone by E-mail Share Building Technologies Office: Simplified Space Conditioning Systems for...

285

Building Technologies Office: Simplified Space Conditioning Systems...  

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

Simplified Space Conditioning Systems for Energy Efficient Homes Expert Meeting Building America hosted the "Simplified Space Conditioning Systems for Energy Efficient Homes"...

286

System architecture for a smart university building  

Science Conference Proceedings (OSTI)

This paper presents a system architecture that provides smart building monitoring and management. The proposed solution integrates heterogeneous geographically disparate sensor networks and devices, and enables optimal operations of the building while ... Keywords: embedded systems, energy efficiency, semantic web service composition, sensor networks, smart building

Thanos G. Stavropoulos; Ageliki Tsioliaridou; George Koutitas; Dimitris Vrakas; Ioannis Vlahavas

2010-09-01T23:59:59.000Z

287

Home | Buildings Technology & Urban Systems Department  

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

Lab Buildings & Urban Systems Buildings Lab Buildings & Urban Systems Buildings Technology & Urban Systems Department Search Search Home About Us Groups Tools & Guides Facilities Publications News Links Contact Us Staff The Building Technology and Urban Systems Department (BTUS) works closely with industry to develop technologies for buildings that increase energy efficiency, and improve the comfort, health, and safety of building occupants. Berkeley Lab Hosts 5 Emerging Leaders During TechWomen 2013 As part of TechWomen 2013, emerging leaders from around the world toured a number of scientific facilities in the Bay Area, including the Advanced Light Source at Berkeley Lab. Pho Read More The Retrocommissioning Sensor Suitcase Brings Energy Efficiency to Small Commercial Buildings The data module communicates wirelessly with the smart pad, which launches

288

ancient building system | OpenEI Community  

Open Energy Info (EERE)

ancient building system ancient building system Home Dc's picture Submitted by Dc(15) Member 15 November, 2013 - 13:26 Living Walls ancient building system architect biomimicry building technology cooling cu daylight design problem energy use engineer fred andreas geothermal green building heat transfer heating living walls metabolic adjustment net zero pre-electricity Renewable Energy Solar university of colorado utility grid Wind Much of the discussion surrounding green buildings centers around reducing energy use. The term net zero is the platinum standard for green buildings, meaning the building in question does not take any more energy from the utility grid than it produces using renewable energy resources, such as solar, wind, or geothermal installations (and sometimes these renewable energy resources actually feed energy back to the utility grid).

289

The impact of retail rate structures on the economics of commercial photovoltaic systems in California  

SciTech Connect

This article examines the impact of retail electricity rate design on the economic value of grid-connected photovoltaic (PV) systems, focusing on commercial customers in California. Using 15-min interval building load and PV production data from a sample of 24 actual commercial PV installations, we compare the value of the bill savings across 20 commercial-customer retail electricity rates currently offered in the state. Across all combinations of customers and rates, we find that the annual bill savings from PV, per kWh generated, ranges from $0.05 to $0.24/kWh. This sizable range in rate-reduction value reflects differences in rate structures, revenue requirements, the size of the PV system relative to building load, and customer load shape. The most significant rate design issue for the value of commercial PV is found to be the percentage of total utility bills recovered through demand charges, though a variety of other factors are also found to be of importance. The value of net metering is found to be substantial, but only when energy from commercial PV systems represents a sizable portion of annual customer load. Though the analysis presented here is specific to California, our general results demonstrate the fundamental importance of retail rate design for the customer-economics of grid-connected, customer-sited PV.

Mills, Andrew D.; Wiser, Ryan; Barbose, Galen; Golove, William

2008-06-24T23:59:59.000Z

290

The Impact of Retail Rate Structures on the Economics of Commercial Photovoltaic Systems in California  

SciTech Connect

This article examines the impact of retail electricity rate design on the economic value of grid-connected photovoltaic (PV) systems, focusing on commercial customers in California. Using 15-minute interval building load and PV production data from a sample of 24 actual commercial PV installations, we compare the value of the bill savings across 20 commercial-customer retail electricity rates currently offered in the state. Across all combinations of customers and rates, we find that the annual bill savings from PV, per kWh generated, ranges from $0.05/kWh to $0.24/kWh. This sizable range in rate-reduction value reflects differences in rate structures, revenue requirements, the size of the PV system relative to building load, and customer load shape. The most significant rate design issue for the value of commercial PV is found to be the percentage of total utility bills recovered through demand charges, though a variety of other factors are also found to be of importance. The value of net metering is found to be substantial, but only when commercial PV systems represent a sizable portion of annual customer load. Though the analysis presented here is specific to California, our general results demonstrate the fundamental importance of retail rate design for the customer-economics of grid-connected, customer-sited PV.

Mills, Andrew; Wiser, Ryan; Barbose, Galen; Golove, William

2008-05-11T23:59:59.000Z

291

Modeling and dynamic performance of a line-commutated photovoltaic inverter system  

SciTech Connect

In this paper, a three-phase line-commutated utility-interactive photovoltaic inverter system is described. A simplified computer code of this system is established and presented in block-diagram form. This model is suitable for use in transient stability programs. The accuracy of the simplified model is verified by comparing the response calculated therefrom with that of a highly detailed photovoltaic system model in which the inverter is represented in valve-by-valve detail.

Wasynczuk, O. (Purdue Univ., Lafayette, IN (USA). School of Electrical Engineering)

1989-09-01T23:59:59.000Z

292

Energy 101: Solar Photovoltaics | Department of Energy  

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

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

293

NREL: Technology Deployment - Building Energy Systems  

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

Building Energy Systems Building Energy Systems NREL experts develop comprehensive energy assessments, models, and tools to optimize building systems across energy efficiency and renewable energy while also improving occupant comfort, safety, and productivity. Northeast Denver Housing Center Northeast Denver Housing Center NREL Identifies PV for 28 Affordable Housing Units Boulder County Housing Authority Boulder County Housing Authority NREL Recommendations Lead to 153 Net Zero Energy Residences Expertise and Knowledge NREL offers technical assistance and project development support by working closely with industry partners to research, develop, and deploy advanced building technologies. Examples include: Building Energy Audits and Assessments NREL provides technical assistance, guidelines, checklists, and data

294

Utilities offer photovoltaic systems to remote residential customers  

SciTech Connect

From Idaho to Arizona and Nevada to Colorado, utilities across the U.S. are beginning to offer remote homeowners an option that may seem unusual today, but might be commonplace in the future. Would-be customers who do not live close to the electric grid may choose the option of photovoltaic (PV) systems to supply their electricity as an alternative to expensive line extension. These customers typically live and/or farm in rural sections of the country. Others own vacation homes far from towns or cities. Solar-powered energy systems have already proven successful for powering pumps to water livestock, and for lights and communications devices in locations far from established sources of electricity. Rather than receiving the customary electric bill for metered service, customers will pay a set rate to use the PV system, which the utility will own and maintain. The initial cost of purchasing the system can be much lower than extending the utility line (which can cost $20,000 a mile). From the utility's standpoint, it saves on investing in lines that stand to generate small profits because of the small load and resultant energy sales.

Van Arsdall, A.

1993-01-01T23:59:59.000Z

295

Building and Fire Publications  

Science Conference Proceedings (OSTI)

... computer simulation; technology utilization; insulation; thermal resistance; evaluation ... to the widespread use of building integrated photovoltaic ...

296

Preoperational test report, vent building ventilation system  

Science Conference Proceedings (OSTI)

This represents a preoperational test report for Vent Building Ventilation Systems, Project W-030. Project W-030 provides a ventilation upgrade for the four Aging Waste Facility tanks. The system provides Heating, Ventilation, and Air Conditioning (HVAC) for the W-030 Ventilation Building. The tests verify correct system operation and correct indications displayed by the central Monitor and Control System.

Clifton, F.T.

1997-11-04T23:59:59.000Z

297

PVUSA instrumentation and data analysis techniques for photovoltaic systems  

DOE Green Energy (OSTI)

The Photovoltaics for Utility Scale Applications (PVUSA) project tests two types of PV systems at the main test site in Davis, California: new module technologies fielded as 20-kW Emerging Module Technology (EMT) arrays and more mature technologies fielded as 70- to 500-kW turnkey Utility-Scale (US) systems. PVUSA members have also installed systems in their service areas. Designed appropriately, data acquisition systems (DASs) can be a convenient and reliable means of assessing system performance, value, and health. Improperly designed, they can be complicated, difficult to use and maintain, and provide data of questionable validity. This report documents PVUSA PV system instrumentation and data analysis techniques and lessons learned. The report is intended to assist utility engineers, PV system designers, and project managers in establishing an objective, then, through a logical series of topics, facilitate selection and design of a DAS to meet the objective. Report sections include Performance Reporting Objectives (including operational versus research DAS), Recommended Measurements, Measurement Techniques, Calibration Issues, and Data Processing and Analysis Techniques. Conclusions and recommendations based on the several years of operation and performance monitoring are offered. This report is one in a series of 1994--1995 PVUSA reports documenting PVUSA lessons learned at the demonstration sites in Davis and Kerman, California. Other topical reports address: five-year assessment of EMTs; validation of the Kerman 500-kW grid support PV plant benefits; construction and safety experience in installing and operating PV systems; balance-of-system design and costs; procurement, acceptance, and rating practices for PV power plants; experience with power conditioning units and power quality.

Newmiller, J.; Hutchinson, P.; Townsend, T.; Whitaker, C.

1995-10-01T23:59:59.000Z

298

Photovoltaic Powering And Control System For Electrochromic Windows  

DOE Patents (OSTI)

A sealed insulated glass unit is provided with an electrochromic device for modulating light passing through the unit. The electrochromic device is controlled from outside the unit by a remote control electrically unconnected to the device. Circuitry within the unit may be magnetically controlled from outside. The electrochromic device is powered by a photovoltaic cells. The photovoltaic cells may be positioned so that at least a part of the light incident on the cell passes through the electrochromic device, providing a form of feedback control. A variable resistance placed in parallel with the electrochromic element is used to control the response of the electrochromic element to changes in output of the photovoltaic cell.

Schulz, Stephen C. (Tewksbury, MA); Michalski, Lech A. (Pennington, NJ); Volltrauer, Hermann N. (Englishtown, NJ); Van Dine, John E. (Faribault, MN)

2000-04-25T23:59:59.000Z

299

Modeling of Performance, Cost, and Financing of Concentrating Solar, Photovoltaic, and Solar Heat Systems (Poster)  

SciTech Connect

This poster, submitted for the CU Energy Initiative/NREL Symposium on October 3, 2006 in Boulder, Colorado, discusses the modeling, performance, cost, and financing of concentrating solar, photovoltaic, and solar heat systems.

Blair, N.; Mehos, M.; Christiansen, C.

2006-10-03T23:59:59.000Z

300

Photovoltaic power plant as FACTS devices in multi-feeder systems  

E-Print Network (OSTI)

This paper illustrates possible configurations for a large-scale photovoltaic power plant (PV), to operate as a FACTS (flexible AC transmission system) device in addition to operating as a source of renewable power generation. ...

Moawwad, Ahmed

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


301

The Installed Price of Solar Photovoltaic Systems in the U.S...  

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

to Decline at a Rapid Pace Tracking the Sun VI August 2013 The installed price of solar photovoltaic (PV) power systems in the United States fell substantially in 2012 and...

302

Sizing handbook for stand-alone photovoltaic/storage systems  

SciTech Connect

This report details the use and development of a simplified sizing technique for stand-alone photovoltaic/storage systems. The array size and storage capacity are chosen to achieve the required loss-of-load probability (LOLP). The LOLP represents the level of confidence at which the system will satisfy the load. An LOLP of 0 means that the load will always be satisfied, and an LOLP of 1 means that the load will never be satisfied. Array sizes are read from array-sizing nomograms as a function of latitude, tilt angle, and average horizontal insolation in December (in the northern hemisphere) or June (in the southern hemisphere). Storage capacities are read from storage-sizing nomograms as a function of the required LOLP. The technique is valid for systems with a fixed tilt array, product or energy storage, and for any hourly load profile or daily load profile within a given month. The only constraint is that the average monthly load must not vary more than +-10% from month to month. The designer can choose from tilt angles from latitude minus 20/sup 0/ to latitude plus 20/sup 0/ and can choose from a range of array size/storage capacity combinations for any given LOLP.

Chapman, R.N.

1987-04-01T23:59:59.000Z

303

PVUSA model technical specification for a turnkey photovoltaic power system  

DOE Green Energy (OSTI)

One of the five objectives of PVUSA is to offer U.S. utilities hands-on experience in designing, procuring, and operating PV systems. The procurement process included the development of a detailed set of technical requirements for a PV system. PVUSA embodied its requirements in a technical specification used as an attachment to its contracts for four utility-scale PV systems in the 200 kW to 500 kW range. The technical specification has also been adapted and used by several utilities. The PVUSA Technical Specification has now been updated and is presented here as a Model Technical Specification (MTS) for utility use. The MTS text is also furnished on a computer disk in Microsoft Word 6.0 so that it may be conveniently adapted by each user. The text includes guidance in the form of comments and by the use of parentheses to indicate where technical information must be developed and inserted. Commercial terms and conditions will reflect the procurement practice of the buyer. The reader is referred to PG&E Report Number 95-3090000. 1, PVUSA Procurement, Acceptance and Rating Practices for Photovoltaic Power Plants (1995) for PVUSA experience and practice. The MTS is regarded by PVUSA as a use-proven document, but needs to be adapted with care and attention to detail.

Dows, R.N.; Gough, E.J.

1995-11-01T23:59:59.000Z

304

Photovoltaic power systems market identification and analysis. Final report, January 1977--February 1978  

DOE Green Energy (OSTI)

This report summarizes the work done by InterTechnology/Solar Corporation, its consultants, Mobil Tyco Solar Energy Corporation and the University of Delaware Institute for Energy Conversion, and its consultants, during the marketing analysis of near and intermediate term photovoltaic power applications. To obtain estimates of the domestic and foreign market potential for photovoltaically powered devices two approaches were used. First, the study was identifying then screening all possible photovoltaic power supply applications. This approach encompassed the first two tasks of the study: (1) a survey of the current uses of photovoltaic systems, both domestic and international, and a projection of the usage of those systems into the future; and (2) a new idea generation task which attempted to come up with new ways of using photovoltaic power. Second, the study required in-depth analysis of key near-term and intermediate-term photovoltaic applications identified during the first phase to obtain reasonable estimates of photovoltaic market potential. This process encompassed the third and fourth tasks of the analysis: (3) refinement of ideas generated in Task 2 so that certain products/applications could be identified, the product defined and a market survey carried out; and (4) development of a detailed product scenario which forecasts sales, barriers to market acceptance, and technical innovationsrequired for proper introduction of the products. The work performed and findings of each task are presented.

Not Available

1979-05-01T23:59:59.000Z

305

Photovoltaic array with minimally penetrating rooftop support system  

DOE Patents (OSTI)

A photovoltaic array including a plurality of photovoltaic assemblies and a plurality of mounting units. The mounting units each include an elongate rail and a plurality of leg assemblies. The rail is sized and configured to maintain a portion of at least two of the photovoltaic assemblies, with the leg assemblies extending from the rail in a spaced-apart fashion and terminating in a foot for placement against a rooftop structure for minimally penetration installation. Further, at least one of the leg assemblies can include a retractable leg. When the photovoltaic array is installed to a rooftop structure including a membrane intermittently secured to a rooftop deck, the retractable leg accommodates upward billowing of the membrane under windy conditions.

Lenox, Carl J.S.

2012-10-23T23:59:59.000Z

306

Photovoltaic generator modeling for large scale distribution system studies.  

E-Print Network (OSTI)

??Geographic regions with favorable conditions for photovoltaic (PHV) power generation are seeing increasing numbers of three-phase commercial installations and single-phase residential sized installations. PHV sources… (more)

Golder, Andrew S.

2007-01-01T23:59:59.000Z

307

Enhanced Reliability of Photovoltaic Systems with Energy Storage and Controls  

DOE Green Energy (OSTI)

This report summarizes efforts to reconfigure loads during outages to allow individual customers the opportunity to enhance the reliability of their electric service through the management of their loads, photovoltaics, and energy storage devices.

Manz, D.; Schelenz, O.; Chandra, R.; Bose, S.; de Rooij, M.; Bebic, J.

2008-02-01T23:59:59.000Z

308

Advanced Residential Buildings Research; Electricity, Resources, & Building Systems Integration (Fact Sheet)  

SciTech Connect

Factsheet describing the Advanced Residential Buildings Research group within NREL's Electricity, Resources, and Buildings Systems Integration Center.

Not Available

2009-09-01T23:59:59.000Z

309

Advanced Commercial Buildings Research; Electricity, Resources, & Building Systems Integration (Fact Sheet)  

SciTech Connect

Factsheet describing the Advanced Commercial Buildings Research group within NREL's Electricity, Resources, and Buildings Systems Integration Center.

Not Available

2009-09-01T23:59:59.000Z

310

Advanced Commercial Buildings Research; Electricity, Resources, & Building Systems Integration (Fact Sheet)  

SciTech Connect

Factsheet describing the Advanced Commercial Buildings Research group within NREL's Electricity, Resources, and Buildings Systems Integration Center.

2009-09-01T23:59:59.000Z

311

Advanced Residential Buildings Research; Electricity, Resources, & Building Systems Integration (Fact Sheet)  

SciTech Connect

Factsheet describing the Advanced Residential Buildings Research group within NREL's Electricity, Resources, and Buildings Systems Integration Center.

2009-09-01T23:59:59.000Z

312

SUNRAYCE 93: Working safely with lead-acid batteries and photovoltaic power systems  

DOE Green Energy (OSTI)

The US Department of Energy (DOE) is sponsoring SUNRAYCE 93 to advance tile technology and use of photovoltaics and electric vehicles. Participants will use cars powered by photovoltaic modules and lead-acid storage batteries. This brochure, prepared for students and faculty participating in this race, outlines the health hazards presented by these electrical systems, and gives guidance on strategies for their safe usage. At the outset, it should be noted that working with photovoltaic systems and batteries requires electric vehicle drivers and technicians to have [open quotes]hands-on[close quotes] contact with the car on a daily basis. It is important that no one work near a photovoltaic energy system or battery, either in a vehicle or on the bench, unless they familiarize themselves with the components in use, and know and observe safe work practices including the safety precautions described in the manuals provided by the various equipment vendors and this document.

DePhillips, M.P.; Moskowitz, P.D.; Fthenakis, V.M.

1992-11-03T23:59:59.000Z

313

SUNRAYCE 93: Working safely with lead-acid batteries and photovoltaic power systems  

DOE Green Energy (OSTI)

The US Department of Energy (DOE) is sponsoring SUNRAYCE 93 to advance tile technology and use of photovoltaics and electric vehicles. Participants will use cars powered by photovoltaic modules and lead-acid storage batteries. This brochure, prepared for students and faculty participating in this race, outlines the health hazards presented by these electrical systems, and gives guidance on strategies for their safe usage. At the outset, it should be noted that working with photovoltaic systems and batteries requires electric vehicle drivers and technicians to have {open_quotes}hands-on{close_quotes} contact with the car on a daily basis. It is important that no one work near a photovoltaic energy system or battery, either in a vehicle or on the bench, unless they familiarize themselves with the components in use, and know and observe safe work practices including the safety precautions described in the manuals provided by the various equipment vendors and this document.

DePhillips, M.P.; Moskowitz, P.D.; Fthenakis, V.M.

1992-11-03T23:59:59.000Z

314

Building Energy Software Tools Directory: Cake Systems  

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

Printable Version Share this resource Home About the Directory Tools by Subject Whole Building Analysis Codes & Standards Materials, Components, Equipment, & Systems Other...

315

Building a Smarter Distribution System in Pennsylvania  

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

PPL Electric Utilities Corporation Smart Grid Investment Grant 1 Building a Smarter Distribution System in Pennsylvania PPL Electric Utilities Corporation (PPL) provides...

316

Photovoltaic balance-of-system designs and costs at PVUSA  

DOE Green Energy (OSTI)

This report is one in a series of 1994-1995 PVUSA reports that document PVUSA lessons learned at demonstration sites in California and Texas. During the last 7 years (1988 to 1994), 16 PV systems ranging from 20 kW to 500 kW have been installed. Six 20-kW emerging module technology (EMT) arrays and three turnkey (i.e., vendor designed and integrated) utility-scale systems were procured and installed at PVUSA`s main test site in Davis, California. PVUSA host utilities have installed a total of seven EMT arrays and utility-scale systems in their service areas. Additional systems at Davis and host utility sites are planned. One of PVUSA`s key objectives is to evaluate the performance, reliability, and cost of PV balance-of-system (BOS). In the procurement stage PVUSA encouraged innovative design to improve upon present practice by reducing maintenance, improving reliability, or lowering manufacturing or construction costs. The project team worked closely with suppliers during the design stage not only to ensure designs met functional and safety specifications, but to provide suggestions for improvement. This report, intended for the photovoltaic (PV) industry and for utility project managers and engineers considering PV plant construction and ownership, documents PVUSA utility-scale system design and cost lessons learned. Complementary PVUSA topical reports document: construction and safety experience; five-year assessment of EMTs; validation of the Kerman 500-kW grid-support PV plant benefits; PVUSA instrumentation and data analysis techniques; procurement, acceptance, and rating practices for PV power plants; experience with power conditioning units and power quality.

Reyes, A.B.; Jennings, C.

1995-05-01T23:59:59.000Z

317

Federal policies to promote the widespread utilization of photovoltaic systems. Supplement: review and critique  

DOE Green Energy (OSTI)

This document is intended as a supplement to the two-volume report entitled Federal Policies to Promote the Widespread Utilization of Photovoltaic Systems that was submitted to Congress by the Department of Energy in February and April of 1980. This supplement contains review comments prepared by knowledgeable experts who reviewed early drafts of the Congressional report. Responses to the review comments by the Jet Propulsion Laboratory, preparer of the Congressional report, are also included in this supplement. The Congressional report, mandated in the Solar Photovoltaic Energy Research, Development, and Demonstration Act of 1978 (P.L. 95-590), discusses various issues related to promoting the deployment of photovoltaic systems through the Federal Photovoltaic Program. Various program strategies and funding levels are examined.

Smith, J.L.

1980-04-15T23:59:59.000Z

318

Mission analysis of photovoltaic solar energy systems. Final report. Volume I. Summary  

SciTech Connect

A summary report of a study program whose principal objective was to develop methods for the technical and economic evaluation of potential missions (applications) for photovoltaic solar energy conversion in the southwestern United States in the 1980 to 2000 period is presented. A secondary objective was to apply the methodology, when developed, to the evaluation of a number of illustrative examples of candidate missions in order to obtain at least a preliminary indication of the competitive position of the photovoltaic technology in the future energy economy of the Southwest. Because of their large potential significance, most of the effort in the study was devoted to two main classes of missions: on-site applications (in which the photovoltaic system serves an electric load point that is colocated with the system) and central station power plant applications. A smaller amount of attention was given to the electrolytic production of hydrogen with electric power generated by the photovoltaic conversion of solar energy. (WHK)

1975-12-01T23:59:59.000Z

319

Durability of Polymeric Encapsulation Materials for Concentrating Photovoltaic Systems (Presentation)  

DOE Green Energy (OSTI)

Many concentrating photovoltaic (CPV) systems use a polymeric encapsulant to couple and optical component and/or coverglass to the cell. In that location, the encapsulation improves the transmission of concentrated optical flux through interface(s), while protecting the cell from the environment. The durability of encapsulation materials, however, is not well established relative to the desired service life of 30 years. Therefore, we have initiated a screen test to identify the field-induced failure modes for a variety of popular PV encapsulation materials. An existing CPV module (with no PV cells present) was modified to accommodate encapsulation specimens. The module (where nominal concentration of solar flux is 500x for the domed-Fresnel design) has been mounted on a tracker in Golden, CO (elevation 1.79 km). Initial results are reported here for 18 months cumulative exposure, including the hottest and coldest months of the past year. Characteristics observed at intervals during that time include: visual appearance, direct and hemispherical transmittance, and mass. Degradation may be assessed from subsequent analysis (including yellowness index and cut-on frequency) relative to the ambient conditions present during field exposure. The fluorescence signature observed of all the silicone specimens is examined here, including possible factors of causation -- the platinum catalyst used in the addition cured materials as well as the primer used to promote adhesion to the quartz substrate and superstrate.

Miller, D. C.; Muller, M.; Kempe, M. D.; Araki, K.; Kennedy, C. E.; Kurtz, S. R.

2012-03-01T23:59:59.000Z

320

Storage Size Determination for Grid-Connected Photovoltaic Systems  

E-Print Network (OSTI)

In this paper, we study the problem of determining the size of battery storage used in grid-connected photovoltaic (PV) systems. In our setting, electricity is generated from PV and is used to supply the demand from loads. Excess electricity generated from the PV can be stored in a battery to be used later on, and electricity must be purchased from the electric grid if the PV generation and battery discharging cannot meet the demand. The objective is to minimize the electricity purchase from the electric grid while at the same time choosing an appropriate battery size. More specifically, we want to find a unique critical value (denoted as $E_{max}^c$) of the battery size such that the cost of electricity purchase remains the same if the battery size is larger than or equal to $E_{max}^c$, and the cost is strictly larger if the battery size is smaller than $E_{max}^c$. We propose an upper bound on $E_{max}^c$, and show that the upper bound is achievable for certain scenarios. For the case with ideal PV generat...

Ru, Yu; Martinez, Sonia

2011-01-01T23:59:59.000Z

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


321

WASTE HANDLING BUILDING ELECTRICAL SYSTEM DESCRIPTION DOCUMENT  

SciTech Connect

The Waste Handling Building Electrical System performs the function of receiving, distributing, transforming, monitoring, and controlling AC and DC power to all waste handling building electrical loads. The system distributes normal electrical power to support all loads that are within the Waste Handling Building (WHB). The system also generates and distributes emergency power to support designated emergency loads within the WHB within specified time limits. The system provides the capability to transfer between normal and emergency power. The system provides emergency power via independent and physically separated distribution feeds from the normal supply. The designated emergency electrical equipment will be designed to operate during and after design basis events (DBEs). The system also provides lighting, grounding, and lightning protection for the Waste Handling Building. The system is located in the Waste Handling Building System. The system consists of a diesel generator, power distribution cables, transformers, switch gear, motor controllers, power panel boards, lighting panel boards, lighting equipment, lightning protection equipment, control cabling, and grounding system. Emergency power is generated with a diesel generator located in a QL-2 structure and connected to the QL-2 bus. The Waste Handling Building Electrical System distributes and controls primary power to acceptable industry standards, and with a dependability compatible with waste handling building reliability objectives for non-safety electrical loads. It also generates and distributes emergency power to the designated emergency loads. The Waste Handling Building Electrical System receives power from the Site Electrical Power System. The primary material handling power interfaces include the Carrier/Cask Handling System, Canister Transfer System, Assembly Transfer System, Waste Package Remediation System, and Disposal Container Handling Systems. The system interfaces with the MGR Operations Monitoring and Control System for supervisory monitoring and control signals. The system interfaces with all facility support loads such as heating, ventilation, and air conditioning, office, fire protection, monitoring and control, safeguards and security, and communications subsystems.

S.C. Khamamkar

2000-06-23T23:59:59.000Z

322

Summary of collaborative photovoltaic industry work to proactively improve codes and standards for photovoltaic power system applications  

SciTech Connect

Several important milestones in codes and standards pertaining to the design, installation and operation of photovoltaic (PV) systems have recently been completed with collaboration of participants from all sectors of the PV industry, utilities and the US Department of Energy`s National Photovoltaic Program. Codes and standards that have been proposed, written or modified include changes and additions for the 1999 National Electrical Code{reg_sign} (NEC{reg_sign}), standards for fire and personnel safety, system testing, component qualification, and utility interconnect. Project authorization requests with the Institute of Electrical and Electronic Engineers (IEEE) have resulted in standards for listing PV modules and balance-of-system components. Industry collaboration with Underwriter Laboratories, Inc. (UL), with the American Society for Testing and Materials (ASTM), and through critical input and review for international standards with the International Electrotechnical Commission (IEC) have resulted in domestic and international standards for PV. Work related to the codes and standards activities through the International Energy Agency (IEA) is also being supported by the PV industry and the US DOE. This paper will concentrate on and summarize the important new NEC proposals for PV systems and will also describe and show the bonds between the activities in other standards writing activities. The paper will also provide an analysis of changes and resulting impacts of selected proposed NEC changes on PV designs, installations and performance.

Bower, W.I.

1997-08-01T23:59:59.000Z

323

US manufacturers of commercially available stand-alone photovoltaic lighting systems  

DOE Green Energy (OSTI)

This report introduces photovoltaic (PV) lighting systems, gives some specifications for ordering these systems, and provides a list of some of the manufacturers of these systems in the United States. These PV lighting systems are all commercially available. They are stand-alone systems because they are not tied to the electric utility power grid.

McNutt, P.

1994-05-01T23:59:59.000Z

324

Analysis of photovoltaic total energy systems for single family residential applications  

DOE Green Energy (OSTI)

The performance and cost-effectiveness of three photovoltaic total energy system concepts designed to meet the thermal and electrical demands of a typical single family house are compared. The three photovoltaic total energy system concepts considered are: (1) All-photovoltaic systems. Passively air-cooled photovoltaic panels provide electricity to meet both electrical and thermal demands. (2) Separate-panel systems. Solar thermal panels provide thermal energy, while passively air-cooled photovoltaic panels serve the purely electric demand. (3) Combined thermal/electric panel systems. Water-cooled photovoltaic panels provide both thermal energy (transported by cooling water) and electrical energy to meet the separate thermal and electrical demands. Additional passively air-cooled photovoltaic panels are added, as required, to meet the electrical demand. The thermal demand is assumed to consist of the energy required for domestic hot water and space heating, while the electrical demand includes the energy required for baseload power (lights, appliances, etc.) plus air conditioning. An analysis procedure has been developed that permits definition of the panel area, electrical and/or thermal storage capacity, and utility backup energy level that, in combination, provide the lowest annual energy cost to the homeowner for each system concept for specified assumptions about costs and system operations. The procedure appears capable of being used to approximately any size system using solar collectors, as well as in any application where the thermal and/or electrical demand is being provided by solar energy, with utility or other conventional backup. This procedure has been used to provide results for homes located in Phoenix, Arizona, and Madison, Wisconsin, and to evaluate the effects of array and backup power costs and the desirability of selling excess electrical energy back to the utility. (WHK)

Chobotov, V.; Siegel, B.

1978-08-01T23:59:59.000Z

325

Solar Photovoltaic Economic Development: Building and Growing a Local PV Industry, August 2011 (Book)  

DOE Green Energy (OSTI)

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.

Not Available

2011-08-01T23:59:59.000Z

326

Solar electric buildings: An overview of today`s applications  

DOE Green Energy (OSTI)

This brochure presents a broad look at photovoltaic-powered buildings. It includes residential and commercial systems, both stand-alone and connected to utility power, that are located in urban, near-urban, and rural settings across the country. As photovoltaic systems for buildings, such as those shown here, represent one of the strongest near-term markets.

NONE

1996-02-01T23:59:59.000Z

327

Energy storage and power conditioning aspects of photovoltaic solar power systems. Volume I. First quarterly report  

SciTech Connect

Solar energy may be utilized as thermal energy or converted into electricity by solar cells. ERDA's National Photovoltaic Conversion Program is concerned with this latter approach and is currently sponsoring industrial programs for photovoltaic systems and devices. In one such program, Spectrolab, Inc., is charged with performing conceptual design and analysis of three photovoltaic solar power systems. The sizes of these three systems will cover the requirements of residential, commercial and electric utility central station applications. In addition to a solar cell array, photovoltaic power systems must also include an energy storage system to enable operation during periods of low insolation and a power conditioning system to control the dc power from the array and convert it into an ac waveshape compatible with existing electrical equipment. The Scientific Development Operation of Bechtel Corporation is participating in the Spectrolab program by compiling and studying data on the energy storage and power conditioning aspects of all three photovoltaic solar power systems and by the conceptual design of the system for electric utility central station applications. The results of the energy storage and power conditioning study effort are presented in this report. (W.D.M.)

1975-10-01T23:59:59.000Z

328

Energy storage and power conditioning aspects of photovoltaic solar power systems. Volume I. First quarterly report  

DOE Green Energy (OSTI)

Solar energy may be utilized as thermal energy or converted into electricity by solar cells. ERDA's National Photovoltaic Conversion Program is concerned with this latter approach and is currently sponsoring industrial programs for photovoltaic systems and devices. In one such program, Spectrolab, Inc., is charged with performing conceptual design and analysis of three photovoltaic solar power systems. The sizes of these three systems will cover the requirements of residential, commercial and electric utility central station applications. In addition to a solar cell array, photovoltaic power systems must also include an energy storage system to enable operation during periods of low insolation and a power conditioning system to control the dc power from the array and convert it into an ac waveshape compatible with existing electrical equipment. The Scientific Development Operation of Bechtel Corporation is participating in the Spectrolab program by compiling and studying data on the energy storage and power conditioning aspects of all three photovoltaic solar power systems and by the conceptual design of the system for electric utility central station applications. The results of the energy storage and power conditioning study effort are presented in this report. (W.D.M.)

Not Available

1975-10-01T23:59:59.000Z

329

Intermediate photovoltaic system application experiment operational performance report. Volume 3. For G. N. Wilcox Memorial Hospital, Kauai, Hawaii  

DOE Green Energy (OSTI)

Presented are the project description, list of participants, and system specifications for the intermediate photovoltaic project at G.N. Wilcox Memorial Hospital, Kauai, Hawaii.

Not Available

1982-09-01T23:59:59.000Z

330

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

DOE Green Energy (OSTI)

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.

Not Available

2009-06-01T23:59:59.000Z

331

Photovoltaic-system costing-methodology development. Final report  

DOE Green Energy (OSTI)

Presented are the results of a study to expand the use of standardized costing methodologies in the National Photovoltaics Program. The costing standards, which include SAMIS for manufacturing costs and M and D for marketing and distribution costs, have been applied to concentrator collectors and power-conditioning units. The M and D model was also computerized. Finally, a uniform construction cost-accounting structure was developed for use in photovoltaic test and application projects. The appendices contain example cases which demonstrate the use of the models.

Not Available

1982-07-01T23:59:59.000Z

332

The interconnection of photovoltaic power systems with the utility grid: An overview for utility engineers  

DOE Green Energy (OSTI)

Utility-interactive (UI) photovoltaic power systems mounted on residences and commercial buildings are likely to become a small, but important source of electric generation in the next century. This is a new concept in utility power production--a change from large-scale central generation to small-scale dispersed generation. As such, it requires a re-examination of many existing standards and practices to enable the technology to develop and emerge into the marketplace. Much work has been done over the last 20 years to identify and solve the potential problems associated with dispersed power generation systems. This report gives an overview of these issues and also provides a guide to applicable codes, standards and other related documents. The main conclusion that can be drawn from this work is that there are no major technical barriers to the implementation of dispersed PV generating systems. While more technical research is needed in some specific areas, the remaining barriers are fundamentally price and policy.

Wills, R.H. [Solar Design Associates, Harvard, MA (United States)

1994-06-01T23:59:59.000Z

333

Conceptual design and systems analysis of photovoltaic power systems. Final report. Volume III(2). Technology  

DOE Green Energy (OSTI)

Conceptual designs were made and analyses were performed on three types of solar photovoltaic power systems. Included were Residential (1 to 10 kW), Intermediate (0.1 to 10 MW), and Central (50 to 1000 MW) Power Systems to be installed in the 1985 to 2000 time period. The following analyses and simulations are covered: residential power system computer simulations, intermediate power systems computer simulation, central power systems computer simulation, array comparative performance, utility economic and margin analyses, and financial analysis methodology.

Pittman, P.F.

1977-05-01T23:59:59.000Z

334

Conceptual design and systems analysis of photovoltaic power systems. Volume III(1). Technology  

DOE Green Energy (OSTI)

Conceptual designs were made and analyses were performed on three types of solar photovoltaic power systems. Included were Residential (1 to 10 kW), Intermediate (0.1 to 10 MW), and Central (50 to 1000 MW) Power Systems to be installed in the 1985 to 2000 time period. Subsystem technology presented here includes: insolation, concentration, silicon solar cell modules, CdS solar cell module, array structure, battery energy storage, power conditioning, residential power system architectural designs, intermediate power system structural design, and central power system facilities and site survey.

Pittman, P.F.

1977-05-01T23:59:59.000Z

335

SOLERAS - Photovoltaic Power Systems Project. Rural solar applications. Final report: project summary  

Science Conference Proceedings (OSTI)

The Saudi Solar Village Project photovoltaic system is described, consisting of 160 arrays, a computerized control system, 1100 kW of electrical storage in lead-acid batteries, and an automatic weather data gathering system. Satisfactory overall system performance is reported. Performance degradation due to dust on the array lenses was determined. Field operational problems are discussed. (LEW)

Not Available

1985-01-01T23:59:59.000Z

336

WASTE HANDLING BUILDING VENTILATION SYSTEM DESCRIPTION DOCUMENT  

SciTech Connect

The Waste Handling Building Ventilation System provides heating, ventilation, and air conditioning (HVAC) for the contaminated, potentially contaminated, and uncontaminated areas of the Monitored Geologic Repository's (MGR) Waste Handling Building (WHB). In the uncontaminated areas, the non-confinement area ventilation system maintains the proper environmental conditions for equipment operation and personnel comfort. In the contaminated and potentially contaminated areas, in addition to maintaining the proper environmental conditions for equipment operation and personnel comfort, the contamination confinement area ventilation system directs potentially contaminated air away from personnel in the WHB and confines the contamination within high-efficiency particulate air (HEPA) filtration units. The contamination confinement areas ventilation system creates airflow paths and pressure zones to minimize the potential for spreading contamination within the building. The contamination confinement ventilation system also protects the environment and the public by limiting airborne releases of radioactive or other hazardous contaminants from the WHB. The Waste Handling Building Ventilation System is designed to perform its safety functions under accident conditions and other Design Basis Events (DBEs) (such as earthquakes, tornadoes, fires, and loss of the primary electric power). Additional system design features (such as compartmentalization with independent subsystems) limit the potential for cross-contamination within the WHB. The system provides status of important system parameters and equipment operation, and provides audible and/or visual indication of off-normal conditions and equipment failures. The Waste Handling Building Ventilation System confines the radioactive and hazardous material within the building such that the release rates comply with regulatory limits. The system design, operations, and maintenance activities incorporate ALARA (as low as is reasonably achievable) principles to maintain personnel radiation doses to all occupational workers below regulatory limits and as low as is reasonably achievable. The Waste Handling Building Ventilation System interfaces with the Waste Handling Building System by being located within the WHB and by maintaining specific pressures, temperatures, and humidity within the building. The system also depends on the WHB for water supply. The system interfaces with the Site Radiological Monitoring System for continuous monitoring of the exhaust air; the Waste Handling Building Fire Protection System for detection of fire and smoke; the Waste Handling Building Electrical System for normal, emergency, and standby power; and the Monitored Geologic Repository Operations Monitoring and Control System for monitoring and control of the system.

P.A. Kumar

2000-06-21T23:59:59.000Z

337

PHOTOVOLTAIC POWER SYSTEMS PROGRAMME Pico Solar PV Systems for Remote  

E-Print Network (OSTI)

A new generation of small PV systems for lighting and communication Report IEA-PVPS T9-12:2012INTERNATIONAL ENERGY AGENCY

unknown authors

2013-01-01T23:59:59.000Z

338

Sustainable Energy Science and Engineering Center Photovoltaic Systems Engineering  

E-Print Network (OSTI)

Date: May 17, 2012 ENI Renewable Energy Prize 2012 The prestigious ENI Renewable and Non-conventional Energy Prize 2012 has been awarded to Harry Atwater of the California Institute of Technology and Albert cells Atwater's and Polman's research addresses the key problems in photovoltaic technology: 1

Krothapalli, Anjaneyulu

339

Probabilistic Analysis of Rechargeable Batteries in a Photovoltaic Power Supply System  

DOE Green Energy (OSTI)

We developed a model for the probabilistic behavior of a rechargeable battery acting as the energy storage component in a photovoltaic power supply system. Stochastic and deterministic models are created to simulate the behavior of the system component;. The components are the solar resource, the photovoltaic power supply system, the rechargeable battery, and a load. Artificial neural networks are incorporated into the model of the rechargeable battery to simulate damage that occurs during deep discharge cycles. The equations governing system behavior are combined into one set and solved simultaneously in the Monte Carlo framework to evaluate the probabilistic character of measures of battery behavior.

Barney, P.; Ingersoll, D.; Jungst, R.; O'Gorman, C.; Paez, T.L.; Urbina, A.

1998-11-24T23:59:59.000Z

340

System integration issues of residential solar photovoltaic systems  

DOE Green Energy (OSTI)

The objective of this study is to evaluate the economic effects of residential solar PV systems on the utility's revenue, capacity, and energy requirements from the electric utility's perspective and to estimate the price that it might pay for surplus energy compared to what it would charge for deficits. The power and energy generated by the solar PV systems reduce the capital and operating costs that would otherwise be incurred by the utility. These avoided costs suggest what the utility might pay for surplus solar PV energy. The avoided costs are evaluated under three integration hypotheses, namely: (1) the utility has no system storage, (2) the utility has system storage, and (3) the solar PV systems are supported by dedicated storage devices, the purpose of which is to minimize sales to and purchases from the utility. Findings are reported in detail. (WHK)

Yamayee, Z.A.; Peschon, J.

1980-03-01T23:59:59.000Z

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


341

Energy Basics: Photovoltaic Cells  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Solar Photovoltaics Cells Systems Concentrating Solar...

342

Energy Basics: Photovoltaics  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Solar Photovoltaics Cells Systems Concentrating Solar...

343

The impact of retail rate structures on the economics of commercial photovoltaic systems in California  

E-Print Network (OSTI)

An Assessment of Photovoltaic Energy Availability DuringPhotovoltaic Generation in South Australia. ” Energy Policy,Solar Photovoltaic Cells. ” Center for the Study of Energy

Mills, Andrew D.

2009-01-01T23:59:59.000Z

344

A Cradle to Grave Framework for Environmental Assessment of Photovoltaic Systems  

E-Print Network (OSTI)

th European Photovoltaic Solar Energy Conference, Barcelona,the 24 th European Photovoltaic Solar Energy Conference andof Roof Mounted Photovoltaic Cells,” Energy Bulletin, June

Zhang, Teresa; Dornfeld, David

2010-01-01T23:59:59.000Z

345

The Impact of Retail Rate Structures on the Economics of Commercial Photovoltaic Systems in California  

E-Print Network (OSTI)

An Assessment of Photovoltaic Energy Availability DuringPhotovoltaic Generation in South Australia. ” Energy Policy,Solar Photovoltaic Cells. ” Center for the Study of Energy

Wiser, Ryan; Mills, Andrew; Barbose, Galen; Golove, William

2007-01-01T23:59:59.000Z

346

The Impact of Retail Rate Structures on the Economics of Commercial Photovoltaic Systems in California  

E-Print Network (OSTI)

An Assessment of Photovoltaic Energy Availability DuringPhotovoltaic Generation in South Australia. ” Energy Policy,Solar Photovoltaic Cells. ” Center for the Study of Energy

Mills, Andrew

2009-01-01T23:59:59.000Z

347

Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems  

E-Print Network (OSTI)

microcrystalline- silicon photovoltaic cell, B) range ofpayback of roof mounted photovoltaic cells. Boustead, I. andmicrocrystalline-silicon photovoltaic cell, B) range of

Zhang, Teresa Weirui

2011-01-01T23:59:59.000Z

348

Fault Detection and Diagnosis in Building HVAC Systems  

E-Print Network (OSTI)

in AHU of VAV system”, Energy Conversion & Management, 30.energy efficient building management system”, Energy Conversionenergy efficient building management system”, Energy Conversion

Najafi, Massieh

2010-01-01T23:59:59.000Z

349

Original articles: Intelligent sun-tracking system based on multiple photodiode sensors for maximisation of photovoltaic energy production  

Science Conference Proceedings (OSTI)

To maximise the energy collected by a given photovoltaic system (PVS), it is important to track the position of the sun so that the PV panels are exposed to the maximum global radiation at any given time. Thus, it is useful to determine the direction ... Keywords: Photovoltaic system, Sensing transducer, Solar radiation, Tracking system

G. M. Tina, F. Arcidiacono, A. Gagliano

2013-05-01T23:59:59.000Z

350

WASTE TREATMENT BUILDING VENTILATION SYSTEM DESCRIPTION DOCUMENT  

SciTech Connect

The Waste Treatment Building Ventilation System provides heating, ventilation, and air conditioning (HVAC) for the contaminated, potentially contaminated, and uncontaminated areas of the Monitored Geologic Repository's (MGR) Waste Treatment Building (WTB). In the uncontaminated areas, the non-confinement area ventilation system maintains the proper environmental conditions for equipment operation and personnel comfort. In the contaminated and potentially contaminated areas, in addition to maintaining the proper environmental conditions for personnel comfort and equipment operation, the contamination confinement area ventilation system directs potentially contaminated air away from personnel in the WTB and confines the contamination within high-efficiency particulate air (HEPA) filtration units. The contamination confinement area ventilation system creates airflow paths and pressure zones to minimize the potential for spreading contamination with the building. The contamination confinement ventilation system also protects the environment and the public by limiting airborne releases of radioactive or other hazardous contaminants from the WTB. The Waste Treatment Building Ventilation System confines the radioactive and hazardous material within the building such that the release rates comply with regulatory limits, The system design, operations, and maintenance activities incorporate ALARA (as low as is reasonably achievable) principles to maintain personnel radiation doses to all occupational workers below regulatory limits and as low as is reasonably achievable. The system provides status of important system parameters and equipment operation, and provides audible and/or visual indication of off-normal conditions and equipment failures. The Waste Treatment Building Ventilation System interfaces with the Waste Treatment Building System by being located in the WTB, and by maintaining specific pressure, temperature, and humidity environments within the building. The system also depends on the WTB for normal electric power supply and the required supply of water for heating, cooling, and humidification. Interface with the Waste Treatment Building System includes the WTB fire protection subsystem for detection of fire and smoke. The Waste Treatment Building Ventilation System interfaces with the Site Radiological Monitoring System for continuous monitoring of the exhaust air and key areas within the WTB, the Monitored Geologic Repository Operations Monitoring and Control System for monitoring and control of system operations, and the Site Generated Radiological Waste Handling System and Site Generated Hazardous, Non-Hazardous & Sanitary Waste Disposal System for routing of pretreated toxic, corrosive, and radiologically contaminated effluent from process equipment to the HEPA filter exhaust ductwork and air-cleaning unit.

P.A. Kumar

2000-06-22T23:59:59.000Z

351

Photovoltaic power converter system with a controller configured to actively compensate load harmonics  

DOE Patents (OSTI)

Photovoltaic power converter system including a controller configured to reduce load harmonics is provided. The system comprises a photovoltaic array and an inverter electrically coupled to the array to generate an output current for energizing a load connected to the inverter and to a mains grid supply voltage. The system further comprises a controller including a first circuit coupled to receive a load current to measure a harmonic current in the load current. The controller includes a second circuit to generate a fundamental reference drawn by the load. The controller further includes a third circuit for combining the measured harmonic current and the fundamental reference to generate a command output signal for generating the output current for energizing the load connected to the inverter. The photovoltaic system may be configured to compensate harmonic currents that may be drawn by the load.

de Rooij, Michael Andrew (Clifton Park, NY); Steigerwald, Robert Louis (Burnt Hills, NY); Delgado, Eladio Clemente (Burnt Hills, NY)

2008-12-16T23:59:59.000Z

352

Montana Sustainable Building Systems | Open Energy Information  

Open Energy Info (EERE)

Systems Systems Jump to: navigation, search Logo: Montana Sustainable Building Systems Name Montana Sustainable Building Systems Address 201 Second St E Place Whitefish, Montana Zip 59937 Sector Buildings Product Cross-laminated timber panel building systems Year founded 2009 Phone number 406-862-9222 Website http://www.smartwoods.com Coordinates 48.410317°, -114.340704° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":48.410317,"lon":-114.340704,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

353

Collaborative recommender systems for building automation  

E-Print Network (OSTI)

Building Automation Systems (BASs) can save building owners money by reducing energy consumption while simultaneously preserving occupant comfort. There are algorithms that optimize this tradeoff, such as detecting which appliances are turned on without requiring expensive status detectors to be attached to each appliance. However, better ways are needed to determine which algorithms are best-suited to a particular building. This paper explores the idea of allowing building managers to automatically communicate among themselves and exchange ratings of individual monitoring and control algorithms in such a way that each building manager can then obtain predicted ratings for all algorithms that he has not yet tried personally. We allow individual algorithms to be replaced by using a blackboard architecture to loosen the coupling between them. We propose a recommender system that operates on a database of contributed ratings to predict ratings of untried algorithms. To explore this approach, we developed a prototype that seamlessly interacts with both emulated physical buildings and buildings simulated in software and we implemented several of the control algorithms described in previous works. We demonstrate a recommender system that selects between algorithms in various types of buildings. 1.

Michael Lemay; Jason J. Haas; Carl A. Gunter

2009-01-01T23:59:59.000Z

354

Concentrating Photovoltaics  

Science Conference Proceedings (OSTI)

Concentrating photovoltaics (CPV) are a promising alternative to flat-plate photovoltaics in high direct normal irradiance (DNI) environments. The technology’s basic operating characteristics offer significant upside compared with other solar technologies: higher system efficiencies of upwards of 30%+; higher capacity factors, generated through two-axis tracking, exceeding 30% in ideal locations; lower cellular degradation from heat compared to flat-plate PV; lower water requirements; and reduced footpri...

2010-11-19T23:59:59.000Z

355

Recent Progress and Future Potential for Concentrating Photovoltaic Power Systems: Preprint  

DOE Green Energy (OSTI)

This paper explores the potential of utility-scale PV power, and, specifically, the opportunity that may arise for concentrating photovoltaics (CPV). In the 1990s, sales of PV modules were dominated by small-size applications such as PV-powered water pumping, emergency telephones, and calculators. More recently, the dramatic growth in the PV industry has been fueled by rooftop systems, especially in Japan and Germany. Such subsidized, grid-connected PV systems are likely to drive PV markets in coming years. Distributed systems deliver power where it is needed, avoiding transmission losses; and residential and commercial systems can be financed along with the rest of a building. Japan and Germany continue to provide market incentives because of their belief in PV's long-term benefits. As successful and important as the rooftop market is for PV sales today, the PV industry will be able to penetrate a larger fraction of the electricity market if PV systems are also used in larger installations, such as utility-owned systems, PV parks, and customer-owned systems. Because retail electricity costs more than wholesale electricity, it is often assumed that PV will address, with incentives, the retail market long before the wholesale market. Here, we show data suggesting that they can grow together. CPV, which uses low-cost lenses or mirrors to focus sunlight on high-efficiency solar cells, has often been presented as a lower-cost approach to utility-scale PV power. Although CPV typically does not compete in rooftop or other current PV markets, CPV could be a major player in a utility-scale market.

Kurtz, S.; Lewandowski, A.; Hayden, H.

2004-08-01T23:59:59.000Z

356

Thermal distribution systems in commercial buildings  

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

Thermal distribution systems in commercial buildings Thermal distribution systems in commercial buildings Title Thermal distribution systems in commercial buildings Publication Type Journal Article LBNL Report Number LBNL-51860 Year of Publication 2003 Authors Diamond, Richard C., Craig P. Wray, Darryl J. Dickerhoff, Nance Matson, and Duo Wang Start Page Chapter Abstract Previous research suggests that HVAC thermal distribution systems in commercial buildings suffer from thermal losses, such as those caused by duct air leakage and poor duct location. Due to a lack of metrics and data showing the potentially large energy savings from reducing these losses, the California building industry has mostly overlooked energy efficiency improvements in this area. The purpose of this project is to obtain the technical knowledge needed to properly measure and understand the energy efficiency of these systems. This project has three specific objectives: to develop metrics and diagnostics for determining system efficiencies, to develop design and retrofit information that the building industry can use to improve these systems, and to determine the energy impacts associated with duct leakage airflows in an existing large commercial building. The primary outcome of this project is the confirmation that duct leakage airflows can significantly impact energy use in large commercial buildings: our measurements indicate that adding 15% duct leakage at operating conditions leads to an increase in fan power of about 25 to 35%. This finding is consistent with impacts of increased duct leakage airflows on fan power that have been predicted by previous simulations. Other project outcomes include the definition of a new metric for distribution system efficiency, the demonstration of a reliable test for determining duct leakage airflows, and the development of new techniques for duct sealing. We expect that the project outcomes will lead to new requirements for commercial thermal distribution system efficiency in future revisions of California's Title 24.

357

EVALUATION OF FLAT-PLATE PHOTOVOLTAIC THERMAL HYBRID SYSTEMS FOR SOLAR ENERGY UTILIZATION.  

DOE Green Energy (OSTI)

The technical and economic attractiveness of combined photovoltaic/thermal (PV/T) solar energy collectors was evaluated. The study was limited to flat-plate collectors since concentrating photovoltaic collectors require active cooling and thus are inherently PV/T collectors, the only decision being whether to use the thermal energy or to dump it. it was also specified at the outset that reduction in required roof area was not to be used as an argument for combining the collection of thermal and electrical energy into one module. Three tests of economic viability were identified, all of which PV/T must pass if it is to be considered a promising alternative: PV/T must prove to be competitive with photovoltaic-only, thermal-only, and side-by-side photovoltaic-plus-thermal collectors and systems. These three tests were applied to systems using low-temperature (unglazed) collectors and to systems using medium-temperature (glazed) collectors in Los Angeles, New York, and Tampa. For photovoltaics, the 1986 DOE cost goals were assumed to have been realized, and for thermal energy collection two technologies were considered: a current technology based on metal and glass, and a future technology based on thin-film plastics. The study showed that for medium-temperature applications PV/T is not an attractive option in any of the locations studied. For low-temperature applications, PV/T appears to be marginally attractive.

ANDREWS,J.W.

1981-06-01T23:59:59.000Z

358

Application of smart grid in photovoltaic power systems, ForskEL (Smart  

Open Energy Info (EERE)

smart grid in photovoltaic power systems, ForskEL (Smart smart grid in photovoltaic power systems, ForskEL (Smart Grid Project) Jump to: navigation, search Project Name Application of smart grid in photovoltaic power systems, ForskEL Country Denmark Coordinates 56.26392°, 9.501785° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":56.26392,"lon":9.501785,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

359

Implementing Fuzzy Expert System for intelligent buildings  

Science Conference Proceedings (OSTI)

In this paper we present the design of an intelligent dome, as well as the design and implementation of the Fuzzy Expert System for the module controlling Ventilation and Air Conditioning. The system was designed as a Client/Server, Blackboard architecture, ... Keywords: Fuzzy Expert Systems, domotics, intelligent buildings, knowledge based systems, knowledge engineering

Carlos A. Reyes-Garcia; Elva. Corona

2003-03-01T23:59:59.000Z

360

Applied research on energy storage and conversion for photovoltaic and wind energy systems. Volume II. Photovoltaic systems with energy storage. Final report  

DOE Green Energy (OSTI)

This volume of the General Electric study was directed at an evaluation of those energy storage technologies deemed best suited for use in conjunction with a photovoltaic energy conversion system in utility, residential and intermediate applications. Break-even cost goals are developed for several storage technologies in each application. These break-even costs are then compared with cost projections presented in Volume I of this report to show technologies and time frames of potential economic viability. The form of the presentation allows the reader to use more accurate storage system cost data as they become available. The report summarizes the investigations performed and presents the results, conclusions and recommendations pertaining to use of energy storage with photovoltaic energy conversion systems. Candidate storage concepts studied include (1) above ground and underground pumped hydro, (2) underground compressed air, (3) electric batteries, (4) flywheels, and (5) hydrogen production and storage. (WHK)

Not Available

1978-01-01T23:59:59.000Z

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


361

Building Systems Diagnostics and Predictive Maintenance  

Science Conference Proceedings (OSTI)

There has been an increasing interest in the development of methods and tools for automated fault detection and diagnostics (FDD) of building systems and components in the 1990s. This chapter, written for the CRC Handbook for HVAC&R Engineering, will describe the status of these methods and and methodologies as applied to HVAC&R and building systems and present certain illustrative case studies.

Katipamula, Srinivas; Pratt, Robert G.; Braun, J.

2001-01-01T23:59:59.000Z

362

Review of Photovoltaic System Reliability Challenges and Opportunities  

Science Conference Proceedings (OSTI)

The silicon photovoltaic (PV) module has reached mature commercial status, capturing 86% of the global PV module market in 2011, with manufacturers offering very similarly configured, essentially interchangeable product designs. As a result of rapidly declining prices for silicon modules, the competing thin-film (TF) module market is experiencing a hiatus in manufacturing expansion. Many TF companies have curtailed expansion plans and several have actually gone bankrupt. New thin film products will ...

2012-12-05T23:59:59.000Z

363

SolarTile: A rooftop integrated photovoltaic system. Phase 1, final report  

DOE Green Energy (OSTI)

AstroPower, Royal Group Technologies, and Solar Design Associates are jointly developing an integrated photovoltaic roofing system for residential and light commercial building applications. This family of products will rely heavily on the technological development of a roofing tile made from recycled plastic and innovative module fabrication and encapsulation processes in conjunction with an advanced Silicon-Film{trademark} solar cell product. This solar power generating roofing product is presently being referred to as the SolarTile. A conceptual drawing of the solar roofing tile is shown. The SolarTile will be integrated with non-solar tiles in a single roof installation permitting ease of assembly and the ability to use conventional roofing techniques at ridges, valleys, and eaves. The Phase 1 effort included tasks aimed at the development of the proposed product concept; product manufacturing or fabrication, and installation cost estimates; business planning; and a market assessment of the proposed product, including target selling prices, target market sectors, size estimates for each market sector, and planned distribution mechanisms for market penetration. Technical goals as stated in the Phase 1 proposal and relevant progress are reported.

NONE

1998-03-26T23:59:59.000Z

364

Design of a single-phase grid-connected photovoltaic systems based on Fuzzy-PID controller  

Science Conference Proceedings (OSTI)

The output power of photovoltaic (PV) module varies with module temperature, solar isolation and 1oads changes etc. In order to control the output power of single-phase grid-connected PV system according to the output power PV arrays. In this paper a ... Keywords: DC/AC inverter, fuzzy-PID control, grid-connected, photovoltaic system

Fengwen Cao; Yiwang Wang

2009-09-01T23:59:59.000Z

365

Capital Cost-Aware Design and Partial Shading-Aware Architecture Optimization of a Reconfigurable Photovoltaic System  

E-Print Network (OSTI)

Photovoltaic System Yanzhi Wang, Xue Lin, and Massoud Pedram University of Southern California Los Angeles, CA Seoul, Korea 151-744 {jmkim, naehyuck}@elpl.snu.ac.kr Abstract-- Photovoltaic (PV) systems are often to the current partial shading pattern. The reconfigurable PV panel architecture integrates every PV cell

Pedram, Massoud

366

Protection and Control for Grid Connected Photovoltaic Power Generation System Based on Instantaneous Power Theory  

Science Conference Proceedings (OSTI)

Reliable protection and reasonable control run an important role in grid connected PV power generation system. The detection and calculation of real and reactive power are the bases of many inverter resident passive and active islanding detection method ... Keywords: Distributed generation, photovoltaic system, grid connected, protection and control, power theory

Fei Wang; Chengcheng Zhang

2009-05-01T23:59:59.000Z

367

Photovoltaic Concentrator System for Roxborough Park. Final report, June 1978-28 February 1979  

DOE Green Energy (OSTI)

The conceptual design of a photovoltaic power supply for the visitors center at Roxborough Park in Colorado is presented. The system will use Fresnel lenses with silicon solar cells and a bank of 110 lead-acid batteries of the locomotive type for storage. The power conditioning equipment and control system are described in detail, and installation and maintenance are discussed. (WHK)

Donovan, R.L.

1979-03-01T23:59:59.000Z

368

Reliability-economics analysis models for photovoltaic power systems. Volume 1  

DOE Green Energy (OSTI)

This report describes the development of modeling techniques to characterize the reliability, availability, and maintenance costs of photovoltaic power systems. The developed models can be used by designers of PV systems in making design decisions and trade-offs to minimize life-cycle energy costs.

Stember, L.H.; Huss, W.R.; Bridgman, M.S.

1982-11-01T23:59:59.000Z

369

SIMULATION OF THE THERMAL INTERACTION BETWEEN A BUILDING INTEGRATED PHOTOVOLTAIC COLLECTOR AND AN AIR-  

E-Print Network (OSTI)

, the storage of thermal energy is used to increase the efficiency of heating and cooling of buildings that convert solar thermal energy to electrical power. The heat capacity of a solid material is mostly of heat with the surroundings. This exchange of heat can be used to store thermal energy. Currently

Paris-Sud XI, Université de

370

Experimental investigation on the photovoltaic-thermal solar heat pump air-conditioning system on water-heating mode  

Science Conference Proceedings (OSTI)

An experimental study on operation performance of photovoltaic-thermal solar heat pump air-conditioning system was conducted in this paper. The experimental system of photovoltaic-thermal solar heat pump air-conditioning system was set up. The performance parameters such as the evaporation pressure, the condensation pressure and the coefficient of performance (COP) of heat pump air-conditioning system, the water temperature and receiving heat capacity in water heater, the photovoltaic (PV) module temperature and the photovoltaic efficiency were investigated. The experimental results show that the mean photovoltaic efficiency of photovoltaic-thermal (PV/T) solar heat pump air-conditioning system reaches 10.4%, and can improve 23.8% in comparison with that of the conventional photovoltaic module, the mean COP of heat pump air-conditioning system may attain 2.88 and the water temperature in water heater can increase to 42 C. These results indicate that the photovoltaic-thermal solar heat pump air-conditioning system has better performances and can stably work. (author)

Fang, Guiyin; Hu, Hainan; Liu, Xu [Department of Physics, Nanjing University, Nanjing 210093 (China)

2010-09-15T23:59:59.000Z

371

Demand-Responsive and Efficient Building Systems as a Resource...  

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

Demand-Responsive and Efficient Building Systems as a Resource for Electricity Reliability Title Demand-Responsive and Efficient Building Systems as a Resource for Electricity...

372

Intelligent Building Energy Information and Control Systems for...  

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

Building Energy Information and Control Systems for Low-Energy Operations and Optimal Demand Response Title Intelligent Building Energy Information and Control Systems for...

373

Duct systems in large commercial buildings: physical characterization...  

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

Duct systems in large commercial buildings: physical characterization, air leakage and heat conduction gains Title Duct systems in large commercial buildings: physical...

374

Energy Mgmt. Systems/Building Controls | Open Energy Information  

Open Energy Info (EERE)

Energy Mgmt. SystemsBuilding Controls Incentives Retrieved from "http:en.openei.orgwindex.php?titleEnergyMgmt.SystemsBuildingControls&oldid267162" Category: Articles...

375

Hybrid solar thermal-photovoltaic systems demonstration, Phase I and II. Final technical progress report, July 5, 1979-December 1982  

DOE Green Energy (OSTI)

The purpose of the project is to investigate a system based on combined photovoltaic/thermal (PV/T) panels to supply the energy needs of a small single family residence. The system finally selected and constructed uses PV/T panels which utilize air as the heat transfer medium. Optimization of thermal performance was accomplished by attaching metal fins to the back surface of each cell which significantly increased the heat transfer coefficient from the solar cells to the air stream. The other major components of the selected system are an air-to-air heat pump, a rock bin thermal energy storage bin, a synchronous dc-to-ac converter, a microprocessor to control the system, a heat exchanger for the domestic hot water system and of course the building itself which is a one story, well insulated structure having a floor area of 1200 ft/sup 2/. A prototype collector was constructed and tested. Based on this experience, twenty collectors, containing 2860 four inch diameter solar cells, were constructed and installed on the building. Performance of the system was simulated using a TRNSYS-derived program, modified to accommodate PV/T panels and to include the particular components included in the selected system. Simulation of the performance showed that about 65 percent of the total annual energy needs of the building would be provided by the PV/T system. Of this total, about one half is produced at a time when it can be used in the building and one half must be sold back to the utility.

Loferski, J.J. (ed.)

1983-12-01T23:59:59.000Z

376

Using Building Control System for Commissioning  

E-Print Network (OSTI)

This paper summarizes the different approaches developed during Annex 40 (research project of International Energy Agency - Energy Conservation in Buildings & Community Systems ) for carrying out commissioning activities using the control system. During our work we have found that control systems in buildings have the potential to greatly improve the commissioning process. In particular, control systems can be used to carry out automated testing on the energy systems in a building in a systematic way. Technologies for carrying out automated commissioning are still in their infancy and very few tools are available for practitioners to use. However, our work has demonstrated that tools can be built using existing infrastructure at relatively low cost. In many cases, tools are software programs that can be implemented on most microprocessor-based platforms.

Vaezi-Nejad, H.; Salsbury, T.; Choiniere, D.

2004-01-01T23:59:59.000Z

377

The current generation of building simulation software is based upon separate building and mechanical system  

E-Print Network (OSTI)

and mechanical systems. Work is underway to develop a new version of the Building Loads Analysis and SystemThe current generation of building simulation software is based upon separate building Thermodynamics (BLAST) [1] energy analysis program which will simulate buildings and mechanical systems

378

Photovoltaic module and array performance characterization methods for all system operating conditions  

DOE Green Energy (OSTI)

This paper provides new test methods and analytical procedures for characterizing the electrical performance of photovoltaic modules and arrays. The methods use outdoor measurements to provide performance parameters both at standard reporting conditions and for all operating conditions encountered by typical photovoltaic systems. Improvements over previously used test methods are identified, and examples of the successful application of the methodology are provided for crystalline- and amorphous-silicon modules and arrays. This work provides an improved understanding of module and array performance characteristics, and perhaps most importantly, a straight- forward yet rigorous model for predicting array performance at all operating conditions. For the first time, the influences of solar irradiance, operating temperature, solar spectrum, solar angle-of- incidence, and temperature coefficients are all addressed in a practical way that will benefit both designers and users of photovoltaics.

King, D.L.

1996-12-31T23:59:59.000Z

379

Durability of Polymeric Encapsulation Materials for Concentrating Photovoltaic Systems (Poster)  

DOE Green Energy (OSTI)

Polymeric encapsulation materials are typically used in concentrating photovoltaic (CPV) modules to protect the cell from the field environment. Because it is physically located adjacent to the cell, the encapsulation is exposed to a high optical flux, often including light in the ultraviolet (UV) and infrared (IR) wavelengths. The durability of encapsulants used in CPV modules is critical to the technology, but is presently not well understood. This work seeks to identify the appropriate material types, field-induced failure mechanisms, and factors of influence (if possible) of polymeric encapsulation. These results will ultimately be weighed against those of future qualification and accelerated life test procedures.

Miller, D. C.; Kempe, M. D.; Araki, K.; Kennedy, C. E.; Kurtz, S. R.

2011-02-01T23:59:59.000Z

380

Operation Diagnosis for Buildings Connecting Building Management Systems with Energy Management Systems  

E-Print Network (OSTI)

Reducing energy consumption of buildings is a good contribution to protect the environment and to reduce costs. The first and most important step to operate a building most efficiently is to make aware of most of the technical parameters. Connecting or installing a Building Automation Sys-tem with an Energy Management System helps to analyze the flow of material, build up an integrated Alarm Management and create an excellent documentation of the installed base. To pick the best of each and connect the two professional systems is the principle for a successful Operation Diagnosis.

Mehler, G.

2008-01-01T23:59:59.000Z

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


381

Buildings  

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

The U.S. Department of Energy (DOE) advances building energy performance through the development and promotion of efficient, affordable, and high impact technologies, systems, and practices. The...

382

LIFE CYCLE ANALYSIS OF HIGH-PERFORMANCE MONOCRYSTALLINE SILICON PHOTOVOLTAIC SYSTEMS: ENERGY PAYBACK TIMES AND NET ENERGY PRODUCTION VALUE  

E-Print Network (OSTI)

LIFE CYCLE ANALYSIS OF HIGH-PERFORMANCE MONOCRYSTALLINE SILICON PHOTOVOLTAIC SYSTEMS: ENERGY and other countries. Higher efficiencies are produced by innovative cell designs and material and energy% more electricity than average efficiency (i.e., 14%) c-Si PV modules. Keywords: Photovoltaic, energy

383

High-performance commercial building systems  

SciTech Connect

This report summarizes key technical accomplishments resulting from the three year PIER-funded R&D program, ''High Performance Commercial Building Systems'' (HPCBS). The program targets the commercial building sector in California, an end-use sector that accounts for about one-third of all California electricity consumption and an even larger fraction of peak demand, at a cost of over $10B/year. Commercial buildings also have a major impact on occupant health, comfort and productivity. Building design and operations practices that influence energy use are deeply engrained in a fragmented, risk-averse industry that is slow to change. Although California's aggressive standards efforts have resulted in new buildings designed to use less energy than those constructed 20 years ago, the actual savings realized are still well below technical and economic potentials. The broad goal of this program is to develop and deploy a set of energy-saving technologies, strategies, and techniques, and improve processes for designing, commissioning, and operating commercial buildings, while improving health, comfort, and performance of occupants, all in a manner consistent with sound economic investment practices. Results are to be broadly applicable to the commercial sector for different building sizes and types, e.g. offices and schools, for different classes of ownership, both public and private, and for owner-occupied as well as speculative buildings. The program aims to facilitate significant electricity use savings in the California commercial sector by 2015, while assuring that these savings are affordable and promote high quality indoor environments. The five linked technical program elements contain 14 projects with 41 distinct R&D tasks. Collectively they form a comprehensive Research, Development, and Demonstration (RD&D) program with the potential to capture large savings in the commercial building sector, providing significant economic benefits to building owners and health and performance benefits to occupants. At the same time this program can strengthen the growing energy efficiency industry in California by providing new jobs and growth opportunities for companies providing the technology, systems, software, design, and building services to the commercial sector. The broad objectives across all five program elements were: (1) To develop and deploy an integrated set of tools and techniques to support the design and operation of energy-efficient commercial buildings; (2) To develop open software specifications for a building data model that will support the interoperability of these tools throughout the building life-cycle; (3) To create new technology options (hardware and controls) for substantially reducing controllable lighting, envelope, and cooling loads in buildings; (4) To create and implement a new generation of diagnostic techniques so that commissioning and efficient building operations can be accomplished reliably and cost effectively and provide sustained energy savings; (5) To enhance the health, comfort and performance of building occupants. (6) To provide the information technology infrastructure for owners to minimize their energy costs and manage their energy information in a manner that creates added value for their buildings as the commercial sector transitions to an era of deregulated utility markets, distributed generation, and changing business practices. Our ultimate goal is for our R&D effort to have measurable market impact. This requires that the research tasks be carried out with a variety of connections to key market actors or trends so that they are recognized as relevant and useful and can be adopted by expected users. While some of this activity is directly integrated into our research tasks, the handoff from ''market-connected R&D'' to ''field deployment'' is still an art as well as a science and in many areas requires resources and a timeframe well beyond the scope of this PIER research program. The TAGs, PAC

Selkowitz, Stephen

2003-10-01T23:59:59.000Z

384

High-performance commercial building systems  

SciTech Connect

This report summarizes key technical accomplishments resulting from the three year PIER-funded R&D program, ''High Performance Commercial Building Systems'' (HPCBS). The program targets the commercial building sector in California, an end-use sector that accounts for about one-third of all California electricity consumption and an even larger fraction of peak demand, at a cost of over $10B/year. Commercial buildings also have a major impact on occupant health, comfort and productivity. Building design and operations practices that influence energy use are deeply engrained in a fragmented, risk-averse industry that is slow to change. Although California's aggressive standards efforts have resulted in new buildings designed to use less energy than those constructed 20 years ago, the actual savings realized are still well below technical and economic potentials. The broad goal of this program is to develop and deploy a set of energy-saving technologies, strategies, and techniques, and improve processes for designing, commissioning, and operating commercial buildings, while improving health, comfort, and performance of occupants, all in a manner consistent with sound economic investment practices. Results are to be broadly applicable to the commercial sector for different building sizes and types, e.g. offices and schools, for different classes of ownership, both public and private, and for owner-occupied as well as speculative buildings. The program aims to facilitate significant electricity use savings in the California commercial sector by 2015, while assuring that these savings are affordable and promote high quality indoor environments. The five linked technical program elements contain 14 projects with 41 distinct R&D tasks. Collectively they form a comprehensive Research, Development, and Demonstration (RD&D) program with the potential to capture large savings in the commercial building sector, providing significant economic benefits to building owners and health and performance benefits to occupants. At the same time this program can strengthen the growing energy efficiency industry in California by providing new jobs and growth opportunities for companies providing the technology, systems, software, design, and building services to the commercial sector. The broad objectives across all five program elements were: (1) To develop and deploy an integrated set of tools and techniques to support the design and operation of energy-efficient commercial buildings; (2) To develop open software specifications for a building data model that will support the interoperability of these tools throughout the building life-cycle; (3) To create new technology options (hardware and controls) for substantially reducing controllable lighting, envelope, and cooling loads in buildings; (4) To create and implement a new generation of diagnostic techniques so that commissioning and efficient building operations can be accomplished reliably and cost effectively and provide sustained energy savings; (5) To enhance the health, comfort and performance of building occupants. (6) To provide the information technology infrastructure for owners to minimize their energy costs and manage their energy information in a manner that creates added value for their buildings as the commercial sector transitions to an era of deregulated utility markets, distributed generation, and changing business practices. Our ultimate goal is for our R&D effort to have measurable market impact. This requires that the research tasks be carried out with a variety of connections to key market actors or trends so that they are recognized as relevant and useful and can be adopted by expected users. While some of this activity is directly integrated into our research tasks, the handoff from ''market-connected R&D'' to ''field deployment'' is still an art as well as a science and in many areas requires resources and a timeframe well beyond the scope of this PIER research program. The TAGs, PAC and other industry partners have assisted directly in this effort

Selkowitz, Stephen

2003-10-01T23:59:59.000Z

385

City of San Jose- Solar Hot Water Heaters & Photovoltaic Systems Permit Requirements  

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

Building, Planning and Electrical Permits are required for Photovoltiac (PV) systems installed in San Jose. In most cases, PV systems must also undergo a Building Plan Review and an Electrical...

386

The NREL Outdoor Accelerated-Weathering Tracking System Photovoltaic Module Exposure Results  

DOE Green Energy (OSTI)

Status results are presented for the Outdoor Accelerated-Weathering Tracking System (OATS) first study on photovoltaic (PV) modules. Studies began in November 1997 on pairs of commercially available crystalline silicon and amorphous silicon (a-Si) PV modules kept at constant resistive load.

Basso, T. S.

2000-01-01T23:59:59.000Z

387

A GUI simulation system for integrating photovoltaic and wind units into power grids  

Science Conference Proceedings (OSTI)

This paper presents a design of simulation software developed in MATLAB environment and within a Graphical User Interface (GUI) framework for performance and economical assessment of Distributed Renewable Energy Systems as they get integrated in the ... Keywords: GUI, photovoltaic, renewable energy

Adel A. Ghandakly; Rostan Rodrigues

2010-07-01T23:59:59.000Z

388

COMPRESSED-AIR ENERGY STORAGE SYSTEMS FOR STAND-ALONE OFF-GRID PHOTOVOLTAIC MODULES  

E-Print Network (OSTI)

-storage materials, flywheels, pumped hydro (PH), superconducting magnetic energy storage (SMES) and compressed airCOMPRESSED-AIR ENERGY STORAGE SYSTEMS FOR STAND-ALONE OFF-GRID PHOTOVOLTAIC MODULES Dominique, USA ABSTRACT In this work, a low-cost, low-volume, low-maintenance, small-scale compressed-air energy

Deymier, Pierre

389

Control System Commissioning for Enhanced Building Operations  

E-Print Network (OSTI)

This paper highlights the import role control systems play in the operation of modern buildings and describes ways to improve the final stage of commissioning. We also describe practical issues associated with modern IT-oriented control systems that can impact a commissioning exercise.

Salsbury, T. I.; Singhal, A.

2003-01-01T23:59:59.000Z

390

DC Arc Fault Detection and Circuit Interruption Technologies for Photovoltaic Systems  

Science Conference Proceedings (OSTI)

In the United States, much like the rest of the world, rapid growth in photovoltaic (PV) systems is currently taking place. These systems are being installed in open fields, on parking structures, and on residential or commercial rooftops. Unfortunately, electrical arcing within a PV system’s DC circuits has caused some fires. DC-sourced electrical fires are difficult to extinguish if arcing originates from unprotected source circuits within a PV array. Several high-visibility structural fires ...

2013-12-20T23:59:59.000Z

391

Performance of 350kW photovoltaic power system for Saudi Arabian villages after 30 months  

Science Conference Proceedings (OSTI)

The installation and checkout of the 350kW PV system was completed in September 1981. Since then this system has operated satisfactorily over the past two and half years and has experienced very little downtime. The system has a rather unique capability to operate in standalone or any of several cogeneration modes. This paper presents an update of the system performance with emphasis on the photovoltaic field. Research effort being implemented for the next two years are also briefly summarized.

Koshaim, B.; Al-Sani, A.; Huraib, F.; Imamura, M.S.; Salim, A.

1984-05-01T23:59:59.000Z

392

An investigation of photovoltaic powered pumps in direct solar domestic hot water systems  

DOE Green Energy (OSTI)

The performance of photovoltaic powered pumps in direct solar domestic hot water (PV-SDHW) systems has been studied. The direct PV- SDHW system employs a photovoltaic array, a separately excited DC- motor, a centrifugal pump, a thermal collector, and a storage tank. A search methodology for an optimum PV-SDHW system configuration has been proposed. A comparison is made between the long-term performance of a PV-SDHW system and a conventional SDHW system operating under three control schemes. The three schemes are: an ON-OFF flow controlled SDHW system operating at the manufacturer-recommended constant flow rate, and a linear proportional flow controlled SDHW system with the flow proportional to the solar radiation operating under an optimum proportionality. 13 refs., 6 figs.

Al-Ibrahim, A.M.; Klein, S.A.; Mitchell, J.W.; Beckman, W.A.

1996-09-01T23:59:59.000Z

393

Durra Building Systems | Open Energy Information  

Open Energy Info (EERE)

Durra Building Systems Durra Building Systems Jump to: navigation, search Name Durra Building Systems Place Whitewright, Texas Zip 75491 Product Creates contruction panels from wheat straw using a patented production process. Coordinates 33.512685°, -96.393299° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.512685,"lon":-96.393299,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

394

Duct Systems in Large Commercial Buildings: Physical  

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

Duct Systems in Large Commercial Buildings: Physical Characterization, Air Leakage, and Heat Conduction Gains William 1. Fisk, Woody Delp, Rick Diamond, Darryl Dickerhoff, Ronnen Levinson, Mark Modera, Matty Nematollahi, Duo Wang Environmental Energy Technologies Division Indoor Environment Department Lawrence Berkeley National Laboratory Berkeley CA 94720 March 30, 1999 This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Building Technology and Community Systems, of the US Department of Energy under Contract No. DE-AC03-76SF00098 and by the California Institute For Energy Efficiency. LBNL-42339

395

Photovoltaic commercialization: an analysis of legal issues affecting a government-accelerated solar industry  

DOE Green Energy (OSTI)

The Photovoltaics Research, Development, and Demonstration Act of 1978 is discussed. Legal issues, including solar access, the need for performance standards, the effects of building codes on photovoltaic system use and commercialization, and manufacturer and installer performance guarantees, are examined. Electric utility policies are examined, including interconnection, and rates and legal issues affecting them. (LEW)

Lamm, D.

1980-06-01T23:59:59.000Z

396

Monitoring Building Systems for Schedule Compliance  

SciTech Connect

As Pacific Northwest National Laboratory (PNNL) initiated a Core Business Hours program, it became a challenge to ensure that the hundreds of systems campus wide were operating within their programmed schedules. Therefore, a collaborative exchange between PNNL operations and PNNL researchers developing the Decision Support for Operations and Maintenance (DSOM) software package was initiated to create a tool to solve this problem. This new DSOM tool verifies systems are operating within scheduled operation times by polling Building Automation and Control Network (BACnet) identifiers of systems’ on/off or command statuses. The tool records the time spent in operation state (ON) and totalizes each system over a rolling 7-day period, highlighting systems that are running over the scheduled hours. This snapshot view allows building management to look quickly at the entire campus to ensure that systems are not operating beyond their scheduled hours.

Jensen, Andrew M.; Belew, Shan T.

2013-02-19T23:59:59.000Z

397

Reliability-economics analysis models for photovoltaic power systems. Volume 2. [SOLREL  

DOE Green Energy (OSTI)

This report describes the development of modeling techniques to characterize the reliability, availability, and maintenance costs of photovoltaic power systems. The developed models can be used by designers of PV systems in making design decisions and trade-offs to minimize life-cycle energy costs. Three actual intermediate PV system designs were modeled as examples. The input data estimates used and the results of the analyses are presented.

Stember, L.H.; Huss, W.R.; Bridgman, M.S.

1982-11-01T23:59:59.000Z

398

Web-based energy information systems for large commercial buildings  

E-Print Network (OSTI)

and benchmark energy use among a portfolio of buildings bybenchmark Motegi et al: Web-based Energy Information Systems For Large Commercial Buildings

Motegi, Naoya; Piette, Mary Ann

2003-01-01T23:59:59.000Z

399

System/Building Tech Integration | Clean Energy | ORNL  

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

Light commercial building flexible research platforms (FRP's) Computer modeling, visualization, analytics SystemsBuilding Integration Group Leader Melissa Lapsa 865.576.8620...

400

Proactive energy management for next-generation building systems...  

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

Proactive energy management for next-generation building systems Argonne is engaged in work to develop sensors and controls to improve the energy efficiency of buildings. As part...

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


401

Building Sensors and Energy Monitoring Systems  

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

for Building Applications &1;&1; Current Status &1;&1; Key Challenges &2;&1;Energy Monitoring Systems in Homes TYPICAL NEW CARS &1;&1; 40-50 sensors per car &1;&1; Wide range of types *&1;...

402

Simple economic evaluation and applications experiments for photovoltaic systems for remote sites  

DOE Green Energy (OSTI)

A simple evaluation of the cost effectiveness of photovoltaic systems is presented. The evaluation is based on a calculation of breakeven costs of photovoltaics (PV) arrays with the levelized costs of two alternative energy sources (1) extension of the utility grid and (2) diesel generators. A selected number of PV applications experiments that are in progress in remote areas of the US are summarized. These applications experiments range from a 23 watt insect survey trap to a 100 kW PV system for a national park complex. It is concluded that PV systems for remote areas are now cost effective in remote small applications with commercially available technology and will be cost competitive for intermediate scale systems (approx. 10 kW) in the 1980s if the DOE 1986 Commercial Readiness Goals are achieved.

Rios, M. Jr.

1980-01-01T23:59:59.000Z

403

Development and Demonstration of DC Photovoltaic Applications  

Science Conference Proceedings (OSTI)

This report documents a field demonstration performed at Bowling Green State University (BGSU) as part of an Electric Power Research Institute (EPRI) research project on improving the economics of photovoltaic (PV) power generation with innovative direct current (dc) applications. Unlike conventional dc uses for PV energy, this project aimed to demonstrate the powering of specific loads in grid-connected buildings without interference to the ac distribution system or other building loads.

2009-10-28T23:59:59.000Z

404

Performance of a Dynamically Controlled Inverter in a Photovoltaic System Interconnected with a Secondary Network Distribution System  

DOE Green Energy (OSTI)

In 2008, a 300 kW{sub peak} photovoltaic (PV) system was installed on the rooftop of the Colorado Convention Center (CCC). The installation was unique for the electric utility, Xcel Energy, as it had not previously permitted a PV system to be interconnected on a building served by the local secondary network distribution system (network). The PV system was installed with several provisions; one to prevent reverse power flow, another called a dynamically controlled inverter (DCI), that curtails the output of the PV inverters to maintain an amount of load supplied by Xcel Energy at the CCC. The DCI system utilizes current transformers (CTs) to sense power flow to insure that a minimum threshold is maintained from Xcel Energy through the network transformers. The inverters are set to track the load on each of the three phases and curtail power from the PV system when the generated PV system current reaches 95% of the current on any phase. This is achieved by the DCI, which gathers inputs from current transformers measuring the current from the PV array, Xcel, and the spot network load. Preventing reverse power flow is a critical technical requirement for the spot network which serve this part of the CCC. The PV system was designed with the expectation that the DCI system would not curtail the PV system, as the expected minimum load consumption was historically higher than the designed PV system size. However, the DCI system has operated many days during the course of a year, and the performance has been excellent. The DCI system at the CCC was installed as a secondary measure to insure that a minimum level of power flows to the CCC from the Xcel Energy network. While this DCI system was intended for localized control, the system could also reduce output percent if an external smart grid control signal was employed. This paper specifically focuses on the performance of the innovative design at this installation; however, the DCI system could also be used for new s- art grid-enabled distribution systems where renewables power contributions at certain conditions or times may need to be curtailed.

Coddington, M. H.; Kroposki, B. D.; Basso, T.; Berger, D.; Crowell, K.; Hayes, J.

2011-01-01T23:59:59.000Z

405

Building Energy Software Tools Directory: Cake Systems  

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

Building Energy Software Tools Directory EERE Building Technologies Office Building Energy Software Tools Directory Printable Version Share this resource Home About the...

406

Summary Status of Conceptual High-Performance, High-Specific-Output Silicon Photovoltaic Systems  

Science Conference Proceedings (OSTI)

The report reviews development efforts and the current status of high-performance, high-specific-output silicon photovoltaic (PV) solar systems. Three system concepts are covered: (1) high-intensity irradiance from individual concentrators directly onto individual PV cells, (2) the redirection of sunlight by a large dish concentrator into a cavity receiver lined with cells, and (3) the redirection of sunlight by a large dish concentrator into a thermophotovoltaic receiver. Key issues, technical risk, and...

1982-05-01T23:59:59.000Z

407

Proceedings of the flat-plate solar array project research forum on photovoltaic metallization systems  

DOE Green Energy (OSTI)

A Photovoltaic Metallization Research Forum, under the sponsorship of the Jet Propulsion Laboratory's Flat-Plate Solar Array Project and the US Department of Energy, was held March 16-18, 1983 at Pine Mountain, Georgia. The Forum consisted of five sessions, covering (1) the current status of metallization systems, (2) system design, (3) thick-film metallization, (4) advanced techniques and (5) future metallization challenges. Twenty-three papers were presented.

None

1983-11-15T23:59:59.000Z

408

Utility-Interconnected Photovoltaic Systems: Evaluating the Rationale for the Utility-Accessible External Disconnect Switch  

DOE Green Energy (OSTI)

The utility-accessible alternating current (AC) external disconnect switch (EDS) for distributed generators, including photovoltaic (PV) systems, is a hardware feature that allows a utility?s employees to manually disconnect a customer-owned generator from the electricity grid. This paper examines the utility-accessible EDS debate in the context of utility-interactive PV systems for residential and small commercial installations. It also evaluates the rationale for EDS requirements.

Coddington, M.; Margolis, R.M.; Aabakken, J.

2008-01-01T23:59:59.000Z

409

Preprint of: A.H. Nosrat, L.G. Swan, J.M. Pearce, Improved Performance of Hybrid Photovoltaic-Trigeneration Systems Over Photovoltaic-Cogen Systems Including Effects of Battery Storage, Energy 49, pp. 366-374 (2013). http://dx.doi.org/10.1016/j.energy.201  

E-Print Network (OSTI)

-Trigeneration Systems Over Photovoltaic-Cogen Systems Including Effects of Battery Storage, Energy 49, pp. 366-374 (2013). http://dx.doi.org/10.1016/j.energy.2012.11.005 Improved Performance of Hybrid Photovoltaic Photovoltaic-Cogen Systems Including Effects of Battery Storage, Energy 49, pp. 366-374 (2013). http

410

Storage Size Determination for Grid-Connected Photovoltaic Systems  

E-Print Network (OSTI)

and upper bounds on Cc ref, and introduce an efficient algorithm for calculating its value; these results greenhouse gas emissions due to fossil fuels and the liberalization of the electricity market have led in zero-energy buildings and residential homes, or iv) power arbitrage under time-of-use electricity

Martínez, Sonia

411

The dynamics of 'systems building' : An analysis of process mutations  

E-Print Network (OSTI)

This thesis investigates systems building in architecture. As the systems approach is an organized process for problem solving, the understanding of structural and functional relationships is essential. As systems building ...

Paul, Rathindra Jurg

1984-01-01T23:59:59.000Z

412

Building Energy Monitoring System: Making Energy Manageable  

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

Building Energy Monitoring System: Making Energy Manageable Building Energy Monitoring System: Making Energy Manageable Speaker(s): Bob Hunter Date: July 21, 2006 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Peng Xu For any line-item expense to be managed, it must first be manageable. In most organizations, this means bringing that expense into the budget/forecast/variance cycle at the department and individual level. While energy costs are the second fastest growing for most organizations, they have simply received a pass on individual accountability. TrendPoint provides a patented system for monitoring energy at the department and user-level. By monitoring each circuit, we assign a circuit to a user, each user to a group and each group to a site. Energy budgets can then be created and assigned to departments, allowing energy costs become a part of

413

Simplified design guide for estimating photovoltaic flat array and system performance  

DOE Green Energy (OSTI)

Simplified, non-computer based methods are presented for predicting photovoltaic array and system performance. The array performance prediction methods are useful for calculating the potential output of passively cooled, flat, south facing max-power tracked arrays. A solar/weather data base for 97 different US and US affiliated stations is provided to aid in these calculations. Also, performance estimates can be made for photovoltaic systems (array, battery, power conditioner) that are backed-up by non-solar reserves capable of meeting the load when the solar system cannot. Such estimates can be made for a total of 41 different sinusoidal, unimodal, and bimodal diurnal load profiles from appropriate graphs included. These allow easy determination of the fraction of the load met by the solar photovoltaic system as a function of array size and (dedicated) battery storage capacity. These performance graphs may also be used for systems without battery storage. Use of array manufacturer's specification sheet data is discussed. Step-by-step procedures, along with suggested worksheets, are provided for carrying out the necessary calculations.

Evans, D.L.; Facinelli, W.A.; Koehler, L.P.

1981-03-01T23:59:59.000Z

414

Building Energy Software Tools Directory: System Analyzer  

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

System Analyzer System Analyzer System Analyzer logo. Software package for load calculation and energy and economic comparative analysis. System Analyzer permits a quick evaluation of virtually any building, system, and equipment combination. Thus, it can be used either as a scoping tool to decide what systems may be appropriate for an initial design, or to get a general feeling of how one system/equipment combination may perform over another. If a certain combination seems especially promising, further analysis can be done by exporting inputs into TRACE 600. The possibilities are endless. And since the program is Windows-based, virtually anyone with minimal HVAC training and experience can use it. Keywords Energy analyses, load calculation, comparison of system and equipment

415

A reliability and availability sensitivity study of a large photovoltaic system.  

Science Conference Proceedings (OSTI)

A reliability and availability model has been developed for a portion of the 4.6 megawatt (MWdc) photovoltaic system operated by Tucson Electric Power (TEP) at Springerville, Arizona using a commercially available software tool, GoldSim{trademark}. This reliability model has been populated with life distributions and repair distributions derived from data accumulated during five years of operation of this system. This reliability and availability model was incorporated into another model that simulated daily and seasonal solar irradiance and photovoltaic module performance. The resulting combined model allows prediction of kilowatt hour (kWh) energy output of the system based on availability of components of the system, solar irradiance, and module and inverter performance. This model was then used to study the sensitivity of energy output as a function of photovoltaic (PV) module degradation at different rates and the effect of location (solar irradiance). Plots of cumulative energy output versus time for a 30 year period are provided for each of these cases.

Stein, Joshua S.; Granata, Jennifer E.; Mundt, Michael Joseph; Miller, Steven P.; Quintana, Michael A.; Collins, Elmer W.; Sorensen, Neil Robert

2010-08-01T23:59:59.000Z

416

Utility-Side Voltage and PQ Control with Inverter-based Photovoltaic Systems  

SciTech Connect

Distributed energy resources (DER) are small generators located close to the load centers. The DERs that are integrated to the grid with the power electronic converter interfaces are capable of providing nonactive power in addition to active power. Hence, they are capable of regulating the voltages of the weak buses in the distribution systems. This paper discusses the voltage control capability of photovoltaic (PV) systems as compared to the traditional capacitor banks. The simulation results prove the effectiveness of dynamic voltage control capability of inverter-based PV. With the proper control algorithm, the active and nonactive power from the DERs like battery banks or solar photovoltaic can be controlled independently. This paper also presents the scenario of controlling the active and nonactive power from the PV array to track and supply the local load.

Adhikari, Sarina [ORNL; Xu, Yan [ORNL; Li, Fangxing [ORNL; Li, Huijuan [ORNL; Kueck, John D [ORNL; Snyder, Isabelle B [ORNL; Barker, Thomas J. [Southern California Edison RTTC; Hite, Ronald [Southern California Edison RTTC

2011-01-01T23:59:59.000Z

417

System for characterizing semiconductor materials and photovoltaic device  

DOE Patents (OSTI)

Apparatus for detecting and mapping defects in the surfaces of polycrystalline material in a manner that distinguishes dislocation pits from grain boundaries includes a first laser of a first wavelength for illuminating a wide spot on the surface of the material, a second laser of a second relatively shorter wavelength for illuminating a relatively narrower spot on the surface of the material, a light integrating sphere with apertures for capturing light scattered by etched dislocation pits in an intermediate range away from specular reflection while allowing light scattered by etched grain boundaries in a near range from specular reflection to pass through, and optical detection devices for detecting and measuring intensities of the respective intermediate scattered light and near specular scattered light. A center blocking aperture or filter can be used to screen out specular reflected light, which would be reflected by nondefect portions of the polycrystalline material surface. An X-Y translation stage for mounting the polycrystalline material and signal processing and computer equipment accommodate raster mapping, recording, and displaying of respective dislocation and grain boundary defect densities. A special etch procedure is included, which prepares the polycrystalline material surface to produce distinguishable intermediate and near specular light scattering in patterns that have statistical relevance to the dislocation and grain boundary defect densities. A reflectance measurement of the piece of material is obtained by adding together the signals from the optical detection devices. In the case where the piece of material includes a photovoltaic device, the current induced in the device by the illuminating light can be measured with a current sensing amplifier after the light integrating sphere is moved away from the device.

Sopori, Bhushan L. (Denver, CO)

1996-01-01T23:59:59.000Z

418

System for characterizing semiconductor materials and photovoltaic device  

DOE Patents (OSTI)

Apparatus for detecting and mapping defects in the surfaces of polycrystalline material in a manner that distinguishes dislocation pits from grain boundaries includes a first laser of a first wavelength for illuminating a wide spot on the surface of the material, a second laser of a second relatively shorter wavelength for illuminating a relatively narrower spot on the surface of the material, a light integrating sphere with apertures for capturing light scattered by etched dislocation pits in an intermediate range away from specular reflection while allowing light scattered by etched grain boundaries in a near range from specular reflection to pass through, and optical detection devices for detecting and measuring intensities of the respective intermediate scattered light and near specular scattered light. A center blocking aperture or filter can be used to screen out specular reflected light, which would be reflected by nondefect portions of the polycrystalline material surface. An X-Y translation stage for mounting the polycrystalline material and signal processing and computer equipment accommodate raster mapping, recording, and displaying of respective dislocation and grain boundary defect densities. A special etch procedure is included, which prepares the polycrystalline material surface to produce distinguishable intermediate and near specular light scattering in patterns that have statistical relevance to the dislocation and grain boundary defect densities. A reflectance measurement of the piece of material is obtained by adding together the signals from the optical detection devices. In the case where the piece of material includes a photovoltaic device, the current induced in the device by the illuminating light can be measured with a current sensing amplifier after the light integrating sphere is moved away from the device. 22 figs.

Sopori, B.L.

1996-12-03T23:59:59.000Z

419

The Impact of Retail Rate Structures on the Economics ofCommercial Photovoltaic Systems in California  

SciTech Connect

To achieve a sizable and self-sustaining market for grid-connected, customer-sited photovoltaic (PV) systems, solar will likely need to be competitive with retail electricity rates. In this report, we examine the impact of retail rate design on the economic value of commercial PV systems in California. Using 15-minute interval building load and PV production data from 24 actual commercial PV installations, we compare the value of the bill savings across 20 commercial customer retail rates currently offered in the state. We find that the specifics of the rate structure, combined with the characteristics of the customer's underlying load and the size of the PV system, can have a substantial impact on the customer-economics of commercial PV systems. Key conclusions for policymakers that emerge from our analysis are as follows: {sm_bullet} Rate design is fundamental to the economics of commercial PV. The rate-reduction value of PV for our sample of commercial customers, considering all available retail tariffs, ranges from $0.05/kWh to $0.24/kWh, reflecting differences in rate structures, the revenue requirements of the various utilities, the size of the PV system relative to building load, and customer load shapes. For the average customer in our sample, differences in rate structure, alone, alter the value of PV by 25% to 75%, depending on the size of the PV system relative to building load. {sm_bullet} TOU-based energy-focused rates can provide substantial value to many PV customers. Retail rates that wrap all or most utility cost recovery needs into time-of-use (TOU)-based volumetric energy rates, and which exclude or limit demand-based charges, provide the most value to PV systems across a wide variety of circumstances. Expanding the availability of such rates will increase the value of many commercial PV systems. {sm_bullet} Offering commercial customers a variety of rate options would be of value to PV. Despite the advantages of energy-focused rates for PV, requiring the use of these tariffs would disadvantage some commercial PV installations. In particular, for PV systems that serve less than 25-50% of annual customer load, the characteristics of the customer's underlying load profile often determine the most favorable rate structure, and energy-focused rate structures may not be ideal for many commercial-customer load shapes. Regulators that wish to establish rates that are beneficial to a range of PV applications should therefore consider allowing customers to choose from among a number of different rate structures. {sm_bullet} Eliminating net metering can significantly degrade the economics of PV systems that serve a large percentage of building load. Under the assumptions stipulated in this report, we find that an elimination of net metering could, in some circumstances, result in more than a 25% loss in the rate-reduction value of commercial PV. As long as annual solar output is less than roughly 25% of customer load and excess PV production can be sold to the local utility at a rate above $0.05/kWh, however, elimination of net metering is found to rarely result in a financial loss of greater than 5% of the rate-reduction value of PV. More detailed conclusions on the rate-reduction value of commercial PV include: {sm_bullet} Commercial PV systems can sometimes greatly reduce demand charges. Though energy-focused retail rates often offer the greatest rate reduction value, commercial PV installations can generate significant reductions in demand charges, in some cases constituting 10-50% of the total rate savings derived from PV installations. These savings, however, depend highly on the size of the PV system relative to building load, on the customer's load shape, and on the design of the demand charge itself. {sm_bullet} The value of demand charge reductions declines with PV system size. At high levels of PV penetration, the value of PV-induced demand charge savings on a $/kWh basis can drop substantially. As a result, the rate-reduction value of PV can decline by up to one-half when a PV system m

Wiser, Ryan; Mills, Andrew; Barbose, Galen; Golove, William

2007-07-03T23:59:59.000Z

420

The Impact of Retail Rate Structures on the Economics ofCommercial Photovoltaic Systems in California  

SciTech Connect

To achieve a sizable and self-sustaining market for grid-connected, customer-sited photovoltaic (PV) systems, solar will likely need to be competitive with retail electricity rates. In this report, we examine the impact of retail rate design on the economic value of commercial PV systems in California. Using 15-minute interval building load and PV production data from 24 actual commercial PV installations, we compare the value of the bill savings across 20 commercial customer retail rates currently offered in the state. We find that the specifics of the rate structure, combined with the characteristics of the customer's underlying load and the size of the PV system, can have a substantial impact on the customer-economics of commercial PV systems. Key conclusions for policymakers that emerge from our analysis are as follows: {sm_bullet} Rate design is fundamental to the economics of commercial PV. The rate-reduction value of PV for our sample of commercial customers, considering all available retail tariffs, ranges from $0.05/kWh to $0.24/kWh, reflecting differences in rate structures, the revenue requirements of the various utilities, the size of the PV system relative to building load, and customer load shapes. For the average customer in our sample, differences in rate structure, alone, alter the value of PV by 25% to 75%, depending on the size of the PV system relative to building load. {sm_bullet} TOU-based energy-focused rates can provide substantial value to many PV customers. Retail rates that wrap all or most utility cost recovery needs into time-of-use (TOU)-based volumetric energy rates, and which exclude or limit demand-based charges, provide the most value to PV systems across a wide variety of circumstances. Expanding the availability of such rates will increase the value of many commercial PV systems. {sm_bullet} Offering commercial customers a variety of rate options would be of value to PV. Despite the advantages of energy-focused rates for PV, requiring the use of these tariffs would disadvantage some commercial PV installations. In particular, for PV systems that serve less than 25-50% of annual customer load, the characteristics of the customer's underlying load profile often determine the most favorable rate structure, and energy-focused rate structures may not be ideal for many commercial-customer load shapes. Regulators that wish to establish rates that are beneficial to a range of PV applications should therefore consider allowing customers to choose from among a number of different rate structures. {sm_bullet} Eliminating net metering can significantly degrade the economics of PV systems that serve a large percentage of building load. Under the assumptions stipulated in this report, we find that an elimination of net metering could, in some circumstances, result in more than a 25% loss in the rate-reduction value of commercial PV. As long as annual solar output is less than roughly 25% of customer load and excess PV production can be sold to the local utility at a rate above $0.05/kWh, however, elimination of net metering is found to rarely result in a financial loss of greater than 5% of the rate-reduction value of PV. More detailed conclusions on the rate-reduction value of commercial PV include: {sm_bullet} Commercial PV systems can sometimes greatly reduce demand charges. Though energy-focused retail rates often offer the greatest rate reduction value, commercial PV installations can generate significant reductions in demand charges, in some cases constituting 10-50% of the total rate savings derived from PV installations. These savings, however, depend highly on the size of the PV system relative to building load, on the customer's load shape, and on the design of the demand charge itself. {sm_bullet} The value of demand charge reductions declines with PV system size. At high levels of PV penetration, the value of PV-induced demand charge savings on a $/kWh basis can drop substantially. As a result, the rate-reduction value of PV can decline by up to one-half when a PV system meets 75% rather

Wiser, Ryan; Mills, Andrew; Barbose, Galen; Golove, William

2007-07-03T23:59:59.000Z

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


421

A Modular Architecture for Building Automation Systems  

E-Print Network (OSTI)

The deployment of building automation systems (BAS) allows to increase comfort, safety and security and to reduce operational cost. Today such systems typically follow a two-layered hierarchical approach. While control networks interconnect distributed sensors, actuators and controllers, a backbone provides the necessary infrastructure for management tasks hosted by configuration and management devices. In addition, devices interconnecting the control network with the backbone and the backbone with further networks (e.g., the Internet) play a strategic role. All BAS devices contributing to a particular functionality differ in their requirements for hardware. This paper discusses requirements for devices used in the building automation domain and presents our work in progress to assemble platforms with different purposes relying on a modular architecture. 1

Wolfgang Granzer; Wolfgang Kastner; Georg Neugschw; Fritz Praus

2006-01-01T23:59:59.000Z

422

SUNRAYCE 95: Working safely with lead-acid batteries and photovoltaic power systems  

DOE Green Energy (OSTI)

This document is a power system and battery safety handbook for participants in the SUNRAYCE 95 solar powered electric vehicle program. The topics of the handbook include batteries, photovoltaic modules, safety equipment needed for working with sulfuric acid electrolyte and batteries, battery transport, accident response, battery recharging and ventilation, electrical risks on-board vehicle, external electrical risks, electrical risk management strategies, and general maintenance including troubleshooting, hydrometer check and voltmeter check.

DePhillips, M.P.; Moskowitz, P.D.; Fthenakis, V.M. [Brookhaven National Lab., Upton, NY (United States). Biomedical and Environmental Assessment Group

1994-05-27T23:59:59.000Z

423

Design and development of a laminated glass-plastic Fresnel lens for point focus photovoltaic systems  

SciTech Connect

The design and development of a laminated glass-plastic Fresnel lens for point focus photovoltaic systems use is described. The objective of this development was to examine the feasibility of producing lenses with a cost effectiveness superior to that of lenses made by casting of acrylic. The procedure used in executing this development, the method used in cost effectiveness evaluation, results obtained and recommendations for further work are presented.

Matalon, L. A.

1982-08-01T23:59:59.000Z

424

Photon management in thermal and solar photovoltaics  

E-Print Network (OSTI)

Photovoltaics is a technology that directly converts photon energy into electrical energy. Depending on the photon source, photovoltaic systems can be categorized into two groups: solar photovoltaics (PV) and thermophotovoltaics ...

Hu, Lu

2008-01-01T23:59:59.000Z

425

SunShot Initiative: Photovoltaic Research Facilities  

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

Initiative: Photovoltaic Research Facilities on AddThis.com... Concentrating Solar Power Photovoltaics Research & Development Competitive Awards Systems Integration Balance of...

426

An Analysis of the Effects of Residential Photovoltaic Energy Systems on  

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

An Analysis of the Effects of Residential Photovoltaic Energy Systems on An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California Title An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California Publication Type Report Refereed Designation Unknown Year of Publication 2011 Authors Hoen, Ben, Ryan H. Wiser, Peter Cappers, and Mark Thayer Pagination 60 Date Published 04/2011 Publisher LBNL City Berkeley Keywords electricity markets and policy group, energy analysis and environmental impacts department, photovoltaics, property values, public acceptance Abstract The Working Group III Special Report on Renewable Energy Sources and Climate Change Mitigation (SRREN) presents an assessment of the literature on the scientific, technological, environmental, economic and social aspects of the contribution of six renewable energy (RE) sources to the mitigation of climate change. It is intended to provide policy relevant information to governments, intergovernmental processes and other interested parties. This Summary for Policymakers provides an overview of the SRREN, summarizing the essential findings. The SRREN consists of 11 chapters. Chapter 1 sets the context for RE and climate change; Chapters 2 through 7 provide information on six RE technologies, and Chapters 8 through 11 address integrative issues. References to chapters and sections are indicated with corresponding chapter and section numbers in square brackets. An explanation of terms, acronyms and chemical symbols used in this SPM can be found in the glossary of the SRREN (Annex I).Conventions and methodologies for determining costs, primary energy and other topics of analysis can be found in Annex II and Annex III. This report communicates uncertainty where relevant.

427

100-kWp photovoltaic power system at Natural Bridges National Monument  

Science Conference Proceedings (OSTI)

The Natural Bridges National Monument in southeastern Utah is the location of the world's largest solar photovoltaic power system. This system, which operates in a stand-alone mode without utility backup, supplies from 300 to 400 kWh/day of 60-Hz AC electrical energy to the diversified loads in the monument headquarters area. A diesel-powered generator serves as backup for the system. The solutions to a number of problems encountered in the design, fabrication, testing and early operation of the system are discussed.

Solman, F.J.; Helfrich, J.H.; Lyon, E.F.; Benoit, A.E.

1980-01-01T23:59:59.000Z

428

NREL: Photovoltaics Research - Company Partners in Photovoltaic  

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

Company Partners in Photovoltaic Manufacturing R&D Company Partners in Photovoltaic Manufacturing R&D More than 40 private-sector companies partnered with NREL on successful efforts within the PV Manufacturing R&D Project. They included manufacturers of crystalline silicon, thin-film, and concentrator solar technologies. The companies are listed below. Advanced Energy Systems Alpha Solarco ASE Americas AstroPower/GE Energy Boeing Aerospace BP Solar Cronar Crystal Systems Dow Corning Energy Conversion Devices Energy Photovoltaics ENTECH Evergreen Solar First Solar Glasstech Solar Global Photovoltaic Specialists Global Solar Energy Golden Photon Iowa Thin Film Technologies ITN Energy Systems Kopin Mobil Solar Energy Omnion Power Engineering Photon Energy Photovoltaics International PowerLight RWE Schott Solar/Schott Solar

429

Energy Basics: Photovoltaic Cell Structures  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Solar Photovoltaics Cells Systems Concentrating Solar...

430

Energy Basics: Photovoltaic Cell Performance  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Solar Photovoltaics Cells Systems Concentrating Solar...

431

Energy Basics: Photovoltaic Cell Materials  

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

Energy Basics Renewable Energy Printable Version Share this resource Biomass Geothermal Hydrogen Hydropower Ocean Solar Photovoltaics Cells Systems Concentrating Solar...

432

Health, safety and environmental issues relating to cadmium usage in photovoltaic energy systems  

DOE Green Energy (OSTI)

This paper discusses the current technology base and hazards associated with two promising thin-film photovoltaic cells that contain cadmium compounds -- cadmium telluride (CdTe) and copper indium diselenide (CuInSe{sub 2}). More specifically, this paper summarizes the toxicological information on cadmium (Cd) compounds; evaluates potential health, safety and environmental hazards associated with cadmium usage in the photovoltaics industry; describes regulatory requirements associated with the use, handling and disposal of cadmium compounds; and lists management options to permit the safe and continued use of these materials. Handling of cadmium in photovoltaic production can present hazards to health, safety and the environment. Prior recognition of these hazards can allow device manufacturers and regulators to implement appropriate and readily available hazard management strategies. Hazards associated with product use (i.e., array fires) and disposal remain controversial and partially unresolved. The most likely effects that could be expected would be those associated with chronic low-level exposures to cadmium wastes. Because of the general immobility of the cadmium present in these devices and availability of environmental and biomonitoring protocols, chronic hazards can be monitored, and remediated if necessary. Nevertheless, concern about cadmium hazards should continue to be emphasized to ensure that health, safety and environmental issues are properly managed. At the same time, the potential role that these systems can play in ameliorating some important health and environmental hazards related to other energy systems should not be ignored. 27 refs., 5 figs., 2 tabs.

Moskowitz, P.D.; Fthenakis, V.M. (Brookhaven National Lab., Upton, NY (USA)); Zweibel, K. (Solar Energy Research Inst., Golden, CO (USA))

1989-12-01T23:59:59.000Z

433

PHOTOVOLTAICS AND COMMERCIAL BUILDINGS--  

E-Print Network (OSTI)

comparable, or nearly so, to energy supplied from the utility power grid. The geographic region is important contacted 143 major electric utilities, account- ing for more than 80% of the U.S. installed electric-2-3 APPROACH #12;Spotlighting Hawaii's Mauna Lani Bay Hotel This sprawling hotel had acres of roof space

Perez, Richard R.

434

Building Integrated Photovoltaic Testbed  

Science Conference Proceedings (OSTI)

... Comparisons are based on energy production, operating temperature, heat flux, and ... An ultrasonic wind sensor is used to measure the magnitude ...

2011-11-15T23:59:59.000Z

435

Build Safety into the Very Beginning of the Computer System  

Science Conference Proceedings (OSTI)

Build Safety into the Very Beginning of the Computer System. From NIST Tech Beat April 28, 2011. ...

2011-05-10T23:59:59.000Z

436

Applications of Optimal Building Energy System Selection and...  

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

Issue Date Published 022013 Keywords batteries, building systems scheduling, microgrids, mixed integer linear programming, optimisation, pv, solar thermal Abstract Berkeley...

437

PV-TONS: A photovoltaic technology ontology system for the design of PV-systems  

Science Conference Proceedings (OSTI)

The impacts of climate change, the increasing demand for energy and the diminishing fossil fuel resources have resulted in the development and use of a large number of renewable energy technologies in building development. These technologies are generating ... Keywords: Climate change, Ontology, PV-system, Renewable energy, Semantic Web

F. H. Abanda; J. H. M. Tah; D. Duce

2013-04-01T23:59:59.000Z

438

Solar Leasing for Residential Photovoltaic Systems (Fact Sheet)  

DOE Green Energy (OSTI)

This publication examines the solar lease option for residential PV systems and describes two solar lease programs already in place.

Not Available

2009-02-01T23:59:59.000Z

439

Building a Smarter Distribution System in Pennsylvania  

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

Study - PPL Electric Utilities Corporation Smart Grid Investment Grant Study - PPL Electric Utilities Corporation Smart Grid Investment Grant 1 Building a Smarter Distribution System in Pennsylvania PPL Electric Utilities Corporation (PPL) provides electricity to 1.4 million customers across central and eastern Pennsylvania. Having installed smart meters and other advanced technologies over the last several years, PPL has experience with operating smart grid systems and achieving operational improvements. To further improve quality of service for its customers, PPL is implementing a $38 million Smart Grid Investment Grant, which includes $19 million in Recovery Act funds from the U.S. Department of Energy (DOE). PPL is installing a distribution management system (DMS), distribution automation (DA) devices, and supporting communication systems in a pilot program in the Harrisburg

440

Interim implementation structure for development of performance criteria and test standards for photovoltaic systems  

DOE Green Energy (OSTI)

This document presents an implementation structure for the near-term development of performance criteria and test methods for photovoltaic (PV) materials, components, subsystems, and systems. The approach is designed to be responsive to the Photovoltaic Research, Development and Demonstration Act of 1978 (PL-95-590). The project is organized into four tasks: (1) establishment of performance criteria and the development of test methods; (2) development of laboratory accreditation/product certification guidelines; (3) development of validation methodologies; and (4) coordination of the quality assurance effort with consensus standards and code organizations. A schedule and milestones are presented for each task. The appendices provide a brief overview of standards and the standards development process. The philosophy behind this project is to develop industry- and user-established performance criteria, test methods, and accreditation procedures which may then be referred to independent consensus standards organizations for the preparation of consensus standards. The emphasis in execution of this approach will be to develop uniform, fair performance criteria and tests and to avoid rigid, prescriptive criteria. Photovoltaics is an emerging technology; criteria written now must be able to accommodate devices and techniques not yet developed.

Not Available

1979-11-15T23:59:59.000Z

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


441

Control of Stand-Alone Photovoltaic System Using Fuzzy-Logic Controller  

E-Print Network (OSTI)

With industrial development the problem of energy shortage is more and more aggravating. The photovoltaic (PV) systems are rapidly expanding and have increasing in electric power technology and regarded as the green energy of the new century control, sizing and management of stand-alone photovoltaic systems are based on static method and energy estimation allowing the simulation of PV system in average condition. Indeed these approaches provide information about the expected performances and acceptable satisfactions rates they do not perform an optimisation of the PV plant for the local climate conditions. The power supplied by solar arrays depends on the radiation, temperature and array voltage, the operation point of a load connected at the boundaries of a photovoltaic generator always does not coincide with that of the optimal point and it varied according to the weather conditions, in this way it's necessary to track the maximum power of solar arrays. The purpose of this work is to use the fuzzy-logic controller (flc) in order to control of maximum power point tracker (mppt) of PV generator under variable radiation conditions. For this, we used as solution the control of the mppt variation in order to deliver the highest power to the load; also we implemented a controller circuit between PC and the regulator system. The designed system is applicable for remote areas or isolated leads and the sizing of stand-alone PV system. Obtained result indicates that the proposed method can successfully be used for control of mppt for stand-alone PV system.

Mellit, A.; Benghanme, M.; Arab, A. H.; Guessoum, A.

2004-01-01T23:59:59.000Z

442

SunShot Initiative: Transformational Approach to Reducing the Total System  

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

Transformational Approach to Transformational Approach to Reducing the Total System Costs of Building-Integrated Photovoltaics to someone by E-mail Share SunShot Initiative: Transformational Approach to Reducing the Total System Costs of Building-Integrated Photovoltaics on Facebook Tweet about SunShot Initiative: Transformational Approach to Reducing the Total System Costs of Building-Integrated Photovoltaics on Twitter Bookmark SunShot Initiative: Transformational Approach to Reducing the Total System Costs of Building-Integrated Photovoltaics on Google Bookmark SunShot Initiative: Transformational Approach to Reducing the Total System Costs of Building-Integrated Photovoltaics on Delicious Rank SunShot Initiative: Transformational Approach to Reducing the Total System Costs of Building-Integrated Photovoltaics on Digg

443

-1- Georgia Guidelines for Reclaimed Water Systems for Buildings PREFACE  

E-Print Network (OSTI)

The Georgia Guidelines for Reclaimed Water Systems for Buildings are intended to assist all parties involved in the design, construction, inspection and maintenance of reclaimed water systems and to help successfully comply with Appendix J, „Reclaimed Water Systems for Buildings ? of the 2011 Georgia Amendments to the International Plumbing Code (IPC), latest adopted version. The parties mentioned above include building owners, reclaimed water purveyors, designers, contractors, and building code officials. This consensus document is the product of the guidelines committee members below:

Frances Carpenter Chairperson; Danny Johnson; Curtis Boswell; Tom Carty; Laura Walker; Ernest U. Earn; Mike Millard; Philip T. Mccreanor, Ph.D.; Phillip George; Joe Messina; Jim Poff; Guy Pihera; Conrad Gelot; Marvin Richards; Chris Kumnick; Bob Bourne

2011-01-01T23:59:59.000Z

444

A Current Re-distribution Scheme for Improved Energy Harvesting in Concentrating Photovoltaic Systems Using Fine-grained dc-dc Conversion.  

E-Print Network (OSTI)

??This thesis presents a distributed power-management architecture for concentrating photovoltaic (CPV) systems. Specifically, the ?-conversion scheme with voltage equalization is analyzed and verified for the… (more)

Zaman, Mohammad Shawkat

2013-01-01T23:59:59.000Z

445

Uncertainties in the Value of Bill Savings from Behind-the-Meter, Residential Photovoltaic Systems: The Roles of Electricity Market Conditions, Retail Rate Design, and Net Metering.  

E-Print Network (OSTI)

??Net metering has become a widespread policy mechanism in the U.S. for supporting customer adoption of distributed photovoltaics (PV), allowing customers with PV systems to… (more)

Darghouth, Naim Richard

2013-01-01T23:59:59.000Z

446

Photovoltaic System Pricing Trends: Historical, Recent, and Near...  

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

Residential & Commercial PV (Median Values) Global Module Price Index Preliminary Price Trends for Systems Installed in 2013: A Focus on California 9 * Data from the California...

447

Integrating Photovoltaic Systems into Low-Income Housing Developments...  

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

Residential Financing Model and Low-Income Resident Job Training Program SEPTEMBER 2011 SOLAR ENERGY TECHNOLOGIES PROGRAM II Integrating PV Systems into Low-Income Housing...

448

The design and control of a thermal management system for a photovoltaic reverse osmosis system  

E-Print Network (OSTI)

Reverse osmosis (RO) is a well-known process for desalinating seawater and brackish groundwater. Desalination is energy-intensive, so using photovoltaic (PV) panels to power the process is an attractive environmentally ...

Kelley, Leah C. (Leah Camille)

2011-01-01T23:59:59.000Z

449

Preliminary evaluation of two-element optical concentrators for use in solar photovoltaic systems  

DOE Green Energy (OSTI)

The objective of this program was: to evaluate for photovoltaic applications the use of the compound parabolic concentrator design as a field collector--in conjunction with a primary focusing concentrator. The primary focusing concentrator may be a parabolic reflector, an array of Fresnel mirrors, a Fresnel lens, or some other type; Select several candidate configurations of such compound systems (focusing concentrators/CPC field collectors); Perform an analytic evaluation of the technical performance of these systems; and identify the most promising configurations and perform a cost effectiveness study pertinent to coupling CPC concentrators to solar cells. (WDM)

None

1975-06-30T23:59:59.000Z

450

Handbook of secondary storage batteries and charge regulators in photovoltaic systems. Final report  

DOE Green Energy (OSTI)

Solar photovoltaic systems often require battery subsystems to store reserve electrical energy for times of zero insolation. This handbook is designed to help the system designer make optimum choices of battery type, battery size and charge control circuits. Typical battery performance characteristics are summarized for four types of lead-acid batteries: pure lead, lead-calcium and lead-antimony pasted flat plate and lead-antimony tubular positive types. Similar data is also provided for pocket plate nickel cadmium batteries. Economics play a significant role in battery selection. Relative costs of each battery type are summarized under a variety of operating regimes expected for solar PV installations.

Not Available

1981-08-01T23:59:59.000Z

451

Energy Efficient Building Ventilation Systems: Innovative Building-Integrated Enthalpy Recovery  

Science Conference Proceedings (OSTI)

BEETIT Project: A2 is developing a building moisture and heat exchange technology that leverages a new material and design to create healthy buildings with lower energy use. Commercial building owners/operators are demanding buildings with greater energy efficiency and healthier indoor environments. A2 is developing a membrane-based heat and moisture exchanger that controls humidity by transferring the water vapor in the incoming fresh air to the drier air leaving the building. Unlike conventional systems, A2 locates the heat and moisture exchanger within the depths of the building’s wall to slow down the air flow and increase the surface area that captures humidity, but with less fan power. The system’s integration into the wall reduces the size and demand on the air conditioning equipment and increases liable floor area flexibility.

None

2010-10-15T23:59:59.000Z

452

Optimal control of photovoltaic arrays  

Science Conference Proceedings (OSTI)

A high value of the energy conversion efficiency is not the only feature a photovoltaic power processing system must have. An optimal control of the photovoltaic generator must be also designed in order to maximize the electrical power it produces, even ... Keywords: Maximum power point tracking, Photovoltaic systems, Power electronics

N. Femia, G. Petrone, G. Spagnuolo, M. Vitelli

2013-05-01T23:59:59.000Z

453

Solar electric buildings: An overview of today`s applications  

DOE Green Energy (OSTI)

This brochure presents a broad look at photovoltaic-powered buildings. It includes residential and commercial systems, both stand-alone and connected to utility power, that are located in urban, near-urban, and rural settings around the world. As photovoltaic (PV) technology continues to improve and costs drop, opportunities for PV will multiply. PV systems for buildings, such as those shown here, represent one of the strongest near-term markets.

NONE

1997-02-01T23:59:59.000Z

454

Energy Saving in Office Building by Floor Integration System...  

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

Energy Saving in Office Building by Floor Integration System: Reducing Total Energy of HVAC and Lighting system using daylight Speaker(s): Yoshifumi Murakami Date: May 20, 2004 -...

455

Building Technologies Office: Highly Energy Efficient Wall Systems...  

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

Highly Energy Efficient Wall Systems Research Project to someone by E-mail Share Building Technologies Office: Highly Energy Efficient Wall Systems Research Project on Facebook...

456

Comparison of Building Energy Modeling Programs: HVAC Systems  

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

Modeling Programs: HVAC Systems Title Comparison of Building Energy Modeling Programs: HVAC Systems Publication Type Report LBNL Report Number LBNL-6432E Year of Publication 2013...

457

Singapore's Zero-Energy Building's daylight monitoring system  

E-Print Network (OSTI)

Furthermore, advanced daylighting systems such as horizontalKeywords: daylighting, building monitoring system, glazingsystem is presented. Criteria to assess the daylighting

Grobe, Lars

2010-01-01T23:59:59.000Z

458

Building Codes and Regulations for Solar Water Heating Systems | Department  

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

Building Codes and Regulations for Solar Water Heating Systems Building Codes and Regulations for Solar Water Heating Systems Building Codes and Regulations for Solar Water Heating Systems June 24, 2012 - 1:50pm Addthis Photo Credit: iStockphoto Photo Credit: iStockphoto Before installing a solar water heating system, you should investigate local building codes, zoning ordinances, and subdivision covenants, as well as any special regulations pertaining to the site. You will probably need a building permit to install a solar energy system onto an existing building. Not every community or municipality initially welcomes residential renewable energy installations. Although this is often due to ignorance or the comparative novelty of renewable energy systems, you must comply with existing building and permit procedures to install your system.

459

Building Codes and Regulations for Solar Water Heating Systems | Department  

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

Building Codes and Regulations for Solar Water Heating Systems Building Codes and Regulations for Solar Water Heating Systems Building Codes and Regulations for Solar Water Heating Systems June 24, 2012 - 1:50pm Addthis Photo Credit: iStockphoto Photo Credit: iStockphoto Before installing a solar water heating system, you should investigate local building codes, zoning ordinances, and subdivision covenants, as well as any special regulations pertaining to the site. You will probably need a building permit to install a solar energy system onto an existing building. Not every community or municipality initially welcomes residential renewable energy installations. Although this is often due to ignorance or the comparative novelty of renewable energy systems, you must comply with existing building and permit procedures to install your system.

460

A semiotic multi-agent system for intelligent building control  

Science Conference Proceedings (OSTI)

Intelligent agents have often been used within intelligent buildings for autonomous actuation of heating, ventilation and air conditioning systems (HVAC) within intelligent buildings. Ubiquitous wireless sensors send environmental data such as temperature, ... Keywords: actuators, affordance, ambient intelligence, collaborative negotiation, intelligent buildings, multi-agent systems, personalisation, pervasive space, semiotics, wireless sensor network

Darren Booy; Kecheng Liu; Bing Qiao; Chris Guy

2008-02-01T23:59:59.000Z

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


461

System Advisor Model: Flat Plate Photovoltaic Performance Modeling...  

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

in the technology and system design. To be accessible by the financial community, the impact of variations in energy yield must also flow through to financial metrics, such as the...

462

Buildings and corporate strategy : towards a management system model  

E-Print Network (OSTI)

This thesis focuses on buildings as a subject of attention and inquiry in a corporate setting. It attempts to draw implications for the design of a management system to deal with the special nature of buildings as a resource. ...

Brana, Rodrigo

1985-01-01T23:59:59.000Z

463

Building Energy Information Systems: User Case Studies  

Science Conference Proceedings (OSTI)

Measured energy performance data are essential to national efforts to improve building efficiency, as evidenced in recent benchmarking mandates, and in a growing body of work that indicates the value of permanent monitoring and energy information feedback. This paper presents case studies of energy information systems (EIS) at four enterprises and university campuses, focusing on the attained energy savings, and successes and challenges in technology use and integration. EIS are broadly defined as performance monitoring software, data acquisition hardware, and communication systems to store, analyze and display building energy information. Case investigations showed that the most common energy savings and instances of waste concerned scheduling errors, measurement and verification, and inefficient operations. Data quality is critical to effective EIS use, and is most challenging at the subsystem or component level, and with non-electric energy sources. Sophisticated prediction algorithms may not be well understood but can be applied quite effectively, and sites with custom benchmark models or metrics are more likely to perform analyses external to the EIS. Finally, resources and staffing were identified as a universal challenge, indicating a need to identify additional models of EIS use that extend beyond exclusive in-house use, to analysis services.

Granderson, Jessica; Piette, Mary Ann; Ghatikar, Girish

2010-03-22T23:59:59.000Z

464

Financing, Overhead, and Profit: An In-Depth Discussion of Costs Associated with Third-Party Financing of Residential and Commercial Photovoltaic Systems  

SciTech Connect

Previous work quantifying the non-hardware balance-of-system costs -- or soft costs -- associated with building a residential or commercial photovoltaic (PV) system has left a significant portion unsegmented in an 'other soft costs' category. This report attempts to better quantify the 'other soft costs' by focusing on the financing, overhead, and profit of residential and commercial PV installations for a specific business model. This report presents results from a bottom-up data-collection and analysis of the upfront costs associated with developing, constructing, and arranging third-party-financed residential and commercial PV systems. It quantifies the indirect corporate costs required to install distributed PV systems as well as the transactional costs associated with arranging third-party financing.

Feldman, D.; Friedman, B.; Margolis, R.

2013-10-01T23:59:59.000Z

465

Optimal Dispatch of Photovoltaic Inverters in Residential Distribution Systems  

E-Print Network (OSTI)

- fined limit. The premise for these active power curtailment (APC) strategies is that the resistance method for determining the active- and reactive-power set points for PV inverters in resi- dential. Index Terms--Distribution networks, inverter control, photo- voltaic systems, optimal power flow

Giannakis, Georgios

466

Design of a 20-kWp photovoltaic concentrator experiment at Fauquier High School, Warrenton, VA  

DOE Green Energy (OSTI)

The design and systems analysis of the photovoltaic concentrator system for Fauquier High School in Warrenton, Virginia, are presented. The system provides both electrical energy from the photovoltaic modules and thermal energy from the cooling of those modules. The dc electrical energy from the photovoltaic modules will be first converted to ac and then used to provide power for lighting in the vocational/technical building and the system control building. The thermal energy collected is stored in a 6500-gallon tank for use in the wintertime to provide heat for a greenhouse located adjacent to the array. The photovoltaic system supplies 20 kWp of electrical power by means of 40 6' wide by 10' long parabolic-cylinder collectors mounted in a polar mode. (WHK)

None

1979-10-18T23:59:59.000Z

467

A View on Future Building System Modeling and Simulation  

SciTech Connect

This chapter presents what a future environment for building system modeling and simulation may look like. As buildings continue to require increased performance and better comfort, their energy and control systems are becoming more integrated and complex. We therefore focus in this chapter on the modeling, simulation and analysis of building energy and control systems. Such systems can be classified as heterogeneous systems because they involve multiple domains, such as thermodynamics, fluid dynamics, heat and mass transfer, electrical systems, control systems and communication systems. Also, they typically involve multiple temporal and spatial scales, and their evolution can be described by coupled differential equations, discrete equations and events. Modeling and simulating such systems requires a higher level of abstraction and modularisation to manage the increased complexity compared to what is used in today's building simulation programs. Therefore, the trend towards more integrated building systems is likely to be a driving force for changing the status quo of today's building simulation programs. Thischapter discusses evolving modeling requirements and outlines a path toward a future environment for modeling and simulation of heterogeneous building systems.A range of topics that would require many additional pages of discussion has been omitted. Examples include computational fluid dynamics for air and particle flow in and around buildings, people movement, daylight simulation, uncertainty propagation and optimisation methods for building design and controls. For different discussions and perspectives on the future of building modeling and simulation, we refer to Sahlin (2000), Augenbroe (2001) and Malkawi and Augenbroe (2004).

Wetter, Michael

2011-04-01T23:59:59.000Z

468

A View on Future Building System Modeling and Simulation  

SciTech Connect

This chapter presents what a future environment for building system modeling and simulation may look like. As buildings continue to require increased performance and better comfort, their energy and control systems are becoming more integrated and complex. We therefore focus in this chapter on the modeling, simulation and analysis of building energy and control systems. Such systems can be classified as heterogeneous systems because they involve multiple domains, such as thermodynamics, fluid dynamics, heat and mass transfer, electrical systems, control systems and communication systems. Also, they typically involve multiple temporal and spatial scales, and their evolution can be described by coupled differential equations, discrete equations and events. Modeling and simulating such systems requires a higher level of abstraction and modularisation to manage the increased complexity compared to what is used in today's building simulation programs. Therefore, the trend towards more integrated building systems is likely to be a driving force for changing the status quo of today's building simulation programs. Thischapter discusses evolving modeling requirements and outlines a path toward a future environment for modeling and simulation of heterogeneous building systems.A range of topics that would require many additional pages of discussion has been omitted. Examples include computational fluid dynamics for air and particle flow in and around buildings, people movement, daylight simulation, uncertainty propagation and optimisation methods for building design and controls. For different discussions and perspectives on the future of building modeling and simulation, we refer to Sahlin (2000), Augenbroe (2001) and Malkawi and Augenbroe (2004).

Wetter, Michael

2011-04-01T23:59:59.000Z

469

Building Thermal Envelope Systems and Materials (BTESM) progress report for DOE Office of Buildings Energy Research  

SciTech Connect

The Monthly Report of the Building Thermal Envelope Systems and Materials (BTESM) Program is a monthly update of both in-house ORNL projects and subcontract activities in the research areas of building materials, wall systems, foundations, roofs, building diagnostics, and research utilization and technology transfer. Presentations are not stand-alone paragraphs every month. Their principal values are the short-time lapse between accomplishment and reporting and their evolution over a period of several months.

Burn, G. (comp.)

1990-01-01T23:59:59.000Z

470

Building Thermal Envelope Systems and Materials (BTESM) progress report for DOE Office of Buildings Energy Research  

SciTech Connect

The Monthly Report of the Building Thermal Envelope Systems and Materials (BTESM) Program is a monthly update of both in-house ORNL projects and subcontract activities in the research areas of building materials, wall systems, foundations, roofs, and building diagnostics. Presentations are not stand-alone paragraphs every month. Their principal values are the short-time lapse between accomplishment and reporting and their evolution over a period of several months.

Burn, G. (comp.)

1990-12-01T23:59:59.000Z

471

Building thermal envelope systems and materials (BTESM) monthly progress report for DOE Office Buildings Energy Research  

SciTech Connect

The Monthly Report of the Building Thermal Envelope Systems and Materials (BTESM) Program is a monthly update of both in-house ORNL projects and subcontract activities in the research areas of building materials, wall systems, foundations, roofs, and building diagnostics. Presentations are not stand-alone paragraphs every month. Their principal values are the short-time lapse between accomplishment and reporting and their evolution over a period of several months.

Burn, G. (comp.)

1990-11-01T23:59:59.000Z

472

An approach to assess the performance of utility-interactive photovoltaic systems  

SciTech Connect

This paper presents a probabilistic approach based on the convolution technique to assess the performance of utility-interactive photovoltaic systems supplying loads. Analytical expressions are developed to obtain the duration curve for the power injected into the utility grid. The energy injected into the grid and drawn from it to supply the load during the study period can be calculated from this duration curve. The load model employed enables the study period to range from one year to one particular hour-of-day, thus allowing the inclusion of the time-value of energy as appropriate in economic assessments.

Abouzahr, I. (Oklahoma State Univ., Stillwater, OK (United States)); Ramakumar, R. (Oklahoma State Univ., Stillwater, OK (United States). Engineering Energy Lab.)

1993-06-01T23:59:59.000Z

473

An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California  

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

Energy Markets and Policy Group * Energy Analysis Department Energy Markets and Policy Group * Energy Analysis Department An Analysis of the Effects of Residential Photovoltaic Energy Systems on Home Sales Prices in California Ben Hoen, Peter Cappers, Mark Thayer, Ryan Wiser Lawrence Berkeley National Laboratory LBNL Webinar June 9 th , 2011 This work was supported by the Office of Energy Efficiency and Renewable Energy (Solar Energy Technologies Program) of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231, by the National Renewable Energy Laboratory under Contract No. DEK-8883050, and by the Clean Energy States Alliance.

474

Agelidis, “Inverter for Single-Phase Grid Connected Photovoltaic Systems – An Overview,” Power Electron  

E-Print Network (OSTI)

Abstract- An overview on recent developments and a summary of the state-of-the-art of inverter technology in Europe for single-phase grid-connected Photovoltaic (PV) systems for power levels up to 5 kW is provided in this paper. The information includes details not only on the topologies commercially available but also on the switching devices employed and the associated switching frequencies, efficiency, price trends and market share. Finally, the paper outlines issues associated with the development of relevant international industry standards affecting PV inverter technology. I.

Martina Cal