Sample records for daylighter daily solar

  1. High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting...

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

    High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting Lead Performer: Creative Light Source,...

  2. P5.60B DERIVATION OF DAYLIGHT AND SOLAR IRRADIANCE DATA FROM SATELLITE OBSERVATIONS

    E-Print Network [OSTI]

    Heinemann, Detlev

    P5.60B DERIVATION OF DAYLIGHT AND SOLAR IRRADIANCE DATA FROM SATELLITE OBSERVATIONS A. Hammer, D project SATELLIGHT an attempt is made to use satellite methods to derive daylight and solar irradiance). In daylighting applications, knowledge of the lumi- nance distribution of the sky is of primary concern. Thus

  3. Daylighter Daily Solar Roof Light | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address:011-DNA Jump to:52c8ff988c1 No38e4011f618b No revision hasDawesCounty isDay,

  4. DAYLIGHTING DIRECTORY 1/1980

    E-Print Network [OSTI]

    ,

    2012-01-01T23:59:59.000Z

    Lighting Design and ~ylight:ing and Passive Solar Buildin. ~Design and Applications, Febo and Kiarch, 1979. "Daylighting and Passive SolarPassive Solar Conference, pp. 271 - 281, January 1979. TERNOEY, STEVEN "Daylighting Design

  5. To be submitted to Solar Energy. Daylight performance of a microstructured prismatic window film in deep open

    E-Print Network [OSTI]

    To be submitted to Solar Energy. Daylight performance of a microstructured prismatic window film Systems Department, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory with vertical windows have the potential to offset lighting energy use in deep perimeter zones

  6. Daylighting Calculation in DOE-2

    E-Print Network [OSTI]

    Winkelmann, F.C

    2013-01-01T23:59:59.000Z

    46 3.2.2 Luminous Efficacy of Solar Radiation . . . . . . .The Availability of Solar Radiation. and Daylight",incidence TSOLNM for solar radiation. TSOLDF =

  7. D i i f S t i bilit i th B ilt E i tDesigning for Sustainability in the Built Environment Exterior Facade Design for Maximum Daylighting and Solar Power

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Facade Design for Maximum Daylighting and Solar Power GenerationGeneration A frank assessment of issues "...the art and science of daylighting is not so much about how to provide enough daylighting as how to do LIGHTING CHARACTER DUE TO DAYLIGHT VARIABILITY · PSYCHOLOGICAL BENEFITS OF· PSYCHOLOGICAL BENEFITS

  8. The Soralux Daylighting System : passive solar illumination for deep-plan building spaces

    E-Print Network [OSTI]

    Thuot, Kevin W. (Kevin William)

    2011-01-01T23:59:59.000Z

    Daylight is a valuable resource for both energy and human health. However, this resource is often underutilized in buildings due to the difficulty of controlling the changing qualities of daylight. Deep-plan building spaces ...

  9. Daylighting Basics | Department of Energy

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

    Articles Lighting and Daylighting Basics Glossary of Energy-Related Terms Passive Solar Building Design Basics Energy Basics Home Renewable Energy Homes & Buildings Lighting...

  10. Roof aperture system for selective collection and control of solar energy for building heating, cooling and daylighting

    DOE Patents [OSTI]

    Sanders, William J. (Kansas City, KS); Snyder, Marvin K. (Overland Park, KS); Harter, James W. (Independence, MO)

    1983-01-01T23:59:59.000Z

    The amount of building heating, cooling and daylighting is controlled by at least one pair of solar energy passing panels, with each panel of the pair of panels being exposed to a separate direction of sun incidence. A shutter-shade combination is associated with each pair of panels and the shutter is connected to the shade so that rectilinear movement of the shutter causes pivotal movement of the shade.

  11. THE DAYLIGHTING SOLUTION

    E-Print Network [OSTI]

    Selkowitz, Stephen

    2013-01-01T23:59:59.000Z

    of modulating sunlight and daylight. By intercepting directto the building owner. Daylight and sunlight have alwaysuse. While the use of daylight in homes is not seen as a

  12. Daylighting Calculation in DOE-2

    E-Print Network [OSTI]

    Winkelmann, F.C

    2013-01-01T23:59:59.000Z

    4 2.3 Daylight46 3.2.1 Exterior Daylight Availabilityof Interior Daylight Illuminance . . . . . . . . . . ..21

  13. The New York Times headquarters daylighting mockup: Monitoredperformance of the daylighting control system

    SciTech Connect (OSTI)

    Lee, Eleanor S.; Selkowitz, Stephen E.

    2006-02-24T23:59:59.000Z

    A nine-month monitored field study of the performance of automated roller shades and daylighting controls was conducted in a 401 m{sup 2} unoccupied, furnished daylighting mockup. The mockup mimicked the southwest corner of a new 110 km{sub 2} commercial building in New York, New York, where The New York Times will be the major tenant. This paper focuses on evaluating the performance of two daylighting control systems installed in separate areas of an open plan office with 1.2-m high workstation partitions: (1) Area A had 0-10 V dimmable ballasts with an open-loop proportional control system and an automated shade controlled to reduce window glare and increase daylight, and (2) Area B had digital addressable lighting interface (DALI) ballasts with a closed-loop integral reset control system and an automated shade controlled to block direct sun. Daylighting control system performance and lighting energy use were monitored. The daylighting control systems demonstrated very reliable performance after they were commissioned properly. Work plane illuminance levels were maintained above 90% of the maximum fluorescent illuminance level for 99.9{+-}0.5% and 97.9{+-}6.1% of the day on average over the monitored period, respectively, in Areas A and B. Daily lighting energy use savings were significant in both Areas over the equinox-to-equinox period compared to a non-daylit reference case. At 3.35 m from the window, 30% average savings were achieved with a sidelit west-facing condition in Area A while 50-60% were achieved with a bilateral daylit south-facing condition in Area B. At 4.57-9.14 m from the window, 5-10% and 25-40% savings were achieved in Areas A and B, respectively. Average savings for the 7-m deep dimming zone were 20-23% and 52-59% for Areas A and B, respectively, depending on the lighting schedule. The large savings and good reliability can be attributed to the automatic management of the interior shades. The DALI-based system exhibited faulty behavior that remains unexplained, but operational errors are expected to be resolved as DALI products reach full maturity. The building owner received very competitive bids ($30-75 US/DALI ballast) and was able to justify use of the daylighting control system based on operational cost savings and increased amenity. Additional energy savings due to reduced solar and lighting heat gains were not quantified but will add to the total operational cost savings.

  14. THE DAYLIGHTING SOLUTION

    E-Print Network [OSTI]

    Selkowitz, Stephen

    2013-01-01T23:59:59.000Z

    1980, pp.l4-20 THE DAYLIGHTING SOLUTION Stephen SelkowitzEEB-W-80-19 W-74 THE DAYLIGHTING SOLUTION Stephen Selkowitz

  15. MANDATORY MEASURES DAYLIGHTING

    E-Print Network [OSTI]

    California at Davis, University of

    MANDATORY MEASURES DAYLIGHTING Reference: Sub-Chapter 4, Section 130.1(d) #12;SECTION 4 Daylighting daylighting controls. · Lighting in daylit zones should have multi-level steps, per Table 130.1-A · Light levels provided at night should be available at all other times · When sufficient daylight is available

  16. MANDATORY MEASURES DAYLIGHTING

    E-Print Network [OSTI]

    California at Davis, University of

    MANDATORY MEASURES DAYLIGHTING Reference: Sub-Chapter 4, Section 130.1(d) #12;SECTION 5 Daylighting daylighting controls. · Lighting in daylit zones should have multi-level steps, per Table 130.1-A · Light levels provided at night should be available at all other times · When sufficient daylight is available

  17. DAYLIGHTING DIRECTORY 1/1980

    E-Print Network [OSTI]

    ,

    2012-01-01T23:59:59.000Z

    shell for passive heating or cooling and daylight. -To consider daylight as having a major contribution inStr. 'NARY PROVIDING A DAYLIGHT ANALYSIS SERVICE USING

  18. Daylight metrics and energy savings

    E-Print Network [OSTI]

    Mardaljevic, John

    2011-01-01T23:59:59.000Z

    lighting energy use under daylight linked lighting controls.simulation of annual daylight illumi- nance distributions and J. Mardaljevic. Useful daylight illuminances: A replace-

  19. Light and Energy -Daylight measurements

    E-Print Network [OSTI]

    Light and Energy - Daylight measurements #12;Light and Energy - Daylight measurements Authors: Jens;3 Title Light and Energy Subtitle Daylight measurements Authors Jens Christoffersen, Ásta Logadóttir ........................................................................................................ 5 Daylight quantity

  20. MANDATORY MEASURES DAYLIGHTING

    E-Print Network [OSTI]

    California at Davis, University of

    MANDATORY MEASURES DAYLIGHTING Reference: Sub-Chapter 4, Section 130.1(d) #12;SECTION 4 MINIMUM DAYLIGHTING FOR LARGE SPACES Large enclosed spaces, such as large retail warehouses, are required to have a minimum amount of daylight available when using the prescriptive method of compliance. The minimum

  1. Forecasting of preprocessed daily solar radiation time series using neural networks

    E-Print Network [OSTI]

    Boyer, Edmond

    Forecasting of preprocessed daily solar radiation time series using neural networks Christophe prediction of global solar radiation on a horizontal surface. First results are promising with nRMSE ~ 21 t or at day d and year y d H0 Extraterrestrial solar radiation coefficient for day d [MJ/m²] xt, xd,y Time

  2. An intuitive daylighting performance analysis and optimization approach

    E-Print Network [OSTI]

    Andersen, Marilyne

    The effective integration of daylighting considerations into the design process requires many issues to be considered simultaneously, such as daily and seasonal variations, illumination, and thermal comfort. To address the ...

  3. Daylight in Guinea-Bissau

    E-Print Network [OSTI]

    Hall, Hiram

    1975-01-01T23:59:59.000Z

    MYLIGfi Iii GJUA-BISSAU by HIRAM HALL daylightdaylight of dawning dextrose of my goad the rapidsdreams of~ soul. daylight daylight of my dawning may i wrap

  4. Energy 101: Daylighting

    ScienceCinema (OSTI)

    None

    2013-05-29T23:59:59.000Z

    Daylighting?the use of windows or skylights for natural lighting and temperature regulation?is one building strategy that can save money for homeowners and businesses. Highly efficient, strategically placed windows maximize the use of natural daylight in a building, lowering the need for artificial lighting without causing heating or cooling problems.

  5. Automated support for experimental approaches in daylighting performances assessment

    E-Print Network [OSTI]

    Ljubicic, Dean M

    2006-01-01T23:59:59.000Z

    The study of daylight and solar reflection has been a topic of increasing interest over the past two decades. A novel mechanical support has been constructed to help better understand this topic that consists of a five ...

  6. Lighting energy savings potential of split-pane electrochromic windows controlled for daylighting with visual comfort

    E-Print Network [OSTI]

    Fernandes, Luis

    2014-01-01T23:59:59.000Z

    Daylight Coefficients, Lighting Research and Technology,America, 1999, The IESNA lighting handbook: reference andcontrol of electric lighting and blinds, Solar Energy, 77(

  7. Delight2 Daylighting Analysis in Energy Plus: Integration and Preliminary User Results

    E-Print Network [OSTI]

    Carroll, William L.; Hitchcock, Robert J.

    2005-01-01T23:59:59.000Z

    solution to the issue of accounting for solar/thermal influences that will likely change as techniques analogous to the daylighting

  8. Lighting and Daylight Harvesting

    E-Print Network [OSTI]

    Bos, J.

    2011-01-01T23:59:59.000Z

    exposing us to the latest products and technologies. Daylight Harvesting A system of controlling the direction and the quantity of light both natural and artificial within a given space. This implies: Control of fenestration in terms of size..., transmission and direction. Control of reflected light within a space. Control of electric light in terms of delivery and amount Daylight harvesting systems are typically designed to maintain a minimum recommended light level. This light level...

  9. average daily intake: Topics by E-print Network

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

    energy and nitrogen balance. The amounts of alfalfa eaten and the levels of nitrogen. Daylight ratio effect is evident in one case : long daily daylight increases the proportion of...

  10. Lighting system combining daylight concentrators and an artificial source

    DOE Patents [OSTI]

    Bornstein, Jonathan G. (Miami, FL); Friedman, Peter S. (Toledo, OH)

    1985-01-01T23:59:59.000Z

    A combined lighting system for a building interior includes a stack of luminescent solar concentrators (LSC), an optical conduit made of preferably optical fibers for transmitting daylight from the LSC stack, a collimating lens set at an angle, a fixture for receiving the daylight at one end and for distributing the daylight as illumination inside the building, an artificial light source at the other end of the fixture for directing artifical light into the fixture for distribution as illumination inside the building, an automatic dimmer/brightener for the artificial light source, and a daylight sensor positioned near to the LSC stack for controlling the automatic dimmer/brightener in response to the daylight sensed. The system also has a reflector positioned behind the artificial light source and a fan for exhausting heated air out of the fixture during summer and for forcing heated air into the fixture for passage into the building interior during winter.

  11. CALIFORNIA ENERGY Daylighting In Schools

    E-Print Network [OSTI]

    CALIFORNIA ENERGY COMMISSION Daylighting In Schools: Reanalysis Report TECHNICALREPORT October 2003 Departments, JimVan Dame of My-Lite Daylighting Systems and Products, Doug Gehring of Celotex, Ivan Johnson

  12. Neural daylight control system

    E-Print Network [OSTI]

    Grif, Horatiu Stefan

    2010-01-01T23:59:59.000Z

    The paper describes the design, the implementation of a neural controller used in an automatic daylight control system. The automatic lighting control system (ALCS) attempt to maintain constant the illuminance at the desired level on working plane even if the daylight contribution is variable. Therefore, the daylight will represent the perturbation signal for the ALCS. The mathematical model of process is unknown. The applied structure of control need the inverse model of process. For this purpose it was used other artificial neural network (ANN) which identify the inverse model of process in an on-line manner. In fact, this ANN identify the inverse model of process + the perturbation signal. In this way the learning signal for neural controller has a better accuracy for the present application.

  13. The New York Times headquarters daylighting mockup: Monitored performance of the daylighting control system

    E-Print Network [OSTI]

    Lee, Eleanor S.; Selkowitz, Stephen E.

    2006-01-01T23:59:59.000Z

    1999. Analysis of Daylight Responsive Dimming Systemglare and increase daylight, and 2) Area B had digitalthe stair to approximate the daylight contributions from the

  14. A preliminary study of the linear relationship between monthly averaged daily solar radiation and daily thermal amplitude in the north of Buenos Aires provence

    E-Print Network [OSTI]

    Cionco, R; Rodriguez, R

    2012-01-01T23:59:59.000Z

    Using irradiance and temperature measurements obtained at the Facultad Regional San Nicol\\'as of UTN, we performed a preliminary study of the linear relationship between monthly averaged daily solar radiation and daily thermal amplitude. The results show a very satisfactory adjustment (R = 0.848, RMS = 0.066, RMS% = 9.690 %), even taking into account the limited number of months (36). Thus, we have a formula of predictive nature, capable of estimating mean monthly solar radiation for various applications. We expect to have new data sets to expand and improve the statistical significance of these results.

  15. Using remotely sensed solar radiation data for reference1 evapotranspiration estimation at a daily time step2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Using remotely sensed solar radiation data for reference1 evapotranspiration estimation: +33 5 57 35 07 59. Email: k-van-leeuwen@enitab.fr13 14 15 Abstract16 Solar radiation is an important database, which displays spatialized19 solar radiation data at a daily time step for Europe and Africa

  16. Statistical correlation between hourly and daily values of solar radiation on horizontal surface at sea level in the Italian climate

    E-Print Network [OSTI]

    Boyer, Edmond

    219- Statistical correlation between hourly and daily values of solar radiation on horizontal- nalières du rayonnement solaire. Abstract. 2014 The knowledge of hourly data of solar radiation is required data measured in Italian stations and propose a method to estimate hourly solar radiation

  17. Effective Daylighting: Evaluating Daylighting Performance in the San Francisco Federal Building from the Perspective of Building Occupants

    E-Print Network [OSTI]

    Konis, Kyle Stas

    2012-01-01T23:59:59.000Z

    quantitative performance indicators of daylight sufficiency?assumptions of existing daylighting performance indicators.existing daylight performance indicators overestimated the

  18. Effectiveness of External Window Attachments Based on Daylight Utilization and Cooling Load Reduction for Small Office Buildings in Hot Humid Climates

    E-Print Network [OSTI]

    Soebarto, V. I.; Degelman, L. O.

    1994-01-01T23:59:59.000Z

    reduce the amount of the daylight needed to supplement interior lighting. Therefore the objective of this study was to explore which strategy would give a balance between solar heat gain reduction and daylight utilization and result in the most energy...

  19. Advanced fenestration systems for improved daylight performance

    E-Print Network [OSTI]

    Selkowitz, S.; Lee, E.S.

    1998-01-01T23:59:59.000Z

    Systems for Improved Daylight Performance S. Selkowitz, E.S.Systems for Improved Daylight Performance S. Selkowitz, E.S.Introduction The use of daylight to replace or supplement

  20. Daily Processing of Solar System Object Observations by Gaia UMR 6202 Cassiope, University of Nice-Sophia Antipolis, CNRS,

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    complex operations, devoted to obtain the best accuracies in the output. It will operate on data obtainedDaily Processing of Solar System Object Observations by Gaia Tanga, P. UMR 6202 Cassiope to a selected event. For this reason, a pipeline performing fast processing of Gaia observations of Solar System

  1. Energy efficient commercial buildings : a study of natural daylighting in the context of adaptive reuse

    E-Print Network [OSTI]

    Crowley, John Stephen

    1982-01-01T23:59:59.000Z

    Daylighting is a powerful design element which can have a dramatic impact on people's perception of space, physical and psychological well-being as well as a building's annual and daily energy requirements. Understanding ...

  2. THE DAYLIGHTING SOLUTION

    E-Print Network [OSTI]

    Selkowitz, Stephen

    2013-01-01T23:59:59.000Z

    Secretary for Conservation and Solar Energy, Office ofSecretary for Conservation and Solar Energy, Office of

  3. Daylighting | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address:011-DNA Jump to:52c8ff988c1 No38e4011f618b No revision hasDawesCounty isDay,Daylighting

  4. Advanced fenestration systems for improved daylight performance

    E-Print Network [OSTI]

    Selkowitz, S.; Lee, E.S.

    1998-01-01T23:59:59.000Z

    daylighting designs is a lack of systems perspective that accounts for, and provides an integrated solution

  5. The Lightswitch Wizard -- reliable daylight simulations

    E-Print Network [OSTI]

    For Initial Design; C. F. Morrison; M. Dubrous; C. F. Reinhart ?; M. Morrison; F. Dubrous

    A web-based, non-expert daylighting analysis tool has been developed to support daylighting-related design decisions in peripheral private offices during an early design stage (http://buildwiz.com). The tool offers a comparative, reliable, and fast analysis of the annual amount of daylight in the offices (daylight factor and daylight autonomy) and the lighting energy performance of automated lighting controls (occupancy sensors, photocells) compared to standard on/off switches. Blinds are either manually or automatically controlled.

  6. DAYLIGHTING METRICS: IS THERE A RELATION BETWEEN USEFUL DAYLIGHT ILLUMINANCE AND DAYLIGHT GLARE PROBABILITY?

    E-Print Network [OSTI]

    J. Mardaljevic; M. Andersen; N. Roy; J. Christoffersen

    The establishment of climate-based daylight modelling within research and practice has led to a fundamental reassessment of both the basis and purpose of daylight metrics. Whilst there is no consensus yet on the precise nature of the metric(s) that should replace the daylight factor, it is generally agreed that these should be founded on climate-based daylight modelling (CBDM). In this paper we examine the relation between the predicted annual occurrence of glare and one of the candidate CBDM metrics that has been proposed, called useful daylight illuminance (UDI). The purpose is to determine if one or more of the UDI metrics (predicted for the horizontal workplane) could serve as a proxy for the probability of daylight glare (i.e. a measure of vertical illuminance received at the eye). For glare we use the simplified daylight glare probability model. The setting is a residential building which we use as a virtual laboratory in two design configurations, each evaluated under all 32 combinations of 8 European climates and 4 building orientations.

  7. Integrating automated shading and smart glazings with daylight controls

    E-Print Network [OSTI]

    Selkowitz, Stephen; Lee, Eleanor

    2004-01-01T23:59:59.000Z

    Effect of Venetian Blinds on Daylight Photoelectric Controland Smart Glazings with Daylight Controls Stephen Selkowitzwith the outdoors and daylight to enhance the quality of the

  8. Singapore's Zero-Energy Building's daylight monitoring system

    E-Print Network [OSTI]

    Grobe, Lars

    2010-01-01T23:59:59.000Z

    A and Mardaljevic J, Useful daylight illuminance: a newparadigm for assessing daylight in buildings, LightingJ and Rogers Z, Dynamic daylight performance metrics for

  9. CALCULATING INTERIOR DAYLIGHT ILLUMINATION WITH A PROGRAMMABLE HAND CALCULATOR

    E-Print Network [OSTI]

    Bryan, Harvey J.

    2013-01-01T23:59:59.000Z

    Committee E-3.2, "Daylight: International RecommendationsCalculation of Natural Daylight," CIE PUBLICATION No. 16,Committee E-3.2, "Natural Daylight: Official Recommenda-

  10. CALCULATING INTERIOR DAYLIGHT ILLUMINATION WITH A PROGRAMMABLE HAND CALCULATOR

    E-Print Network [OSTI]

    Bryan, Harvey J.

    2013-01-01T23:59:59.000Z

    Committee E-3.2, "Daylight: International Recommendationsthe Calculation of Natural Daylight, 11 CIE PUBLICATION No.Committee E-3.2 1 "Natural Daylight: Official Recommenda-

  11. UNIVERSITY OF CALIFORNIA, SAN DIEGO Acoustic Daylight: passive acoustic imaging

    E-Print Network [OSTI]

    Buckingham, Michael

    UNIVERSITY OF CALIFORNIA, SAN DIEGO Acoustic Daylight: passive acoustic imaging using ambient noise ............................................................................................... xviii SECTION 1: INTRODUCTION Chapter 1: Acoustic Daylight......................................................................... 1 1.2 Acoustic Daylight

  12. Effective Daylighting: Evaluating Daylighting Performance in the San Francisco Federal Building from the Perspective of Building Occupants

    E-Print Network [OSTI]

    Konis, Kyle Stas

    2012-01-01T23:59:59.000Z

    of Task 21 / Annex 29, Daylight in Buildings. October, 1997.Energy performance of daylight-linked automatic lightingField Commissioning of a daylight-dimming lighting system.

  13. Effective Daylighting: Evaluating Daylighting Performance in the San Francisco Federal Building from the Perspective of Building Occupants

    E-Print Network [OSTI]

    Konis, Kyle Stas

    2011-01-01T23:59:59.000Z

    of Task 21 / Annex 29, Daylight in Buildings. October, 1997.Energy performance of daylight-linked automatic lightingBegemann, G. et al. (1997). Daylight, artificial light and

  14. Forecasting of preprocessed daily solar radiation time series using neural networks

    SciTech Connect (OSTI)

    Paoli, Christophe; Muselli, Marc; Nivet, Marie-Laure [University of Corsica, CNRS UMR SPE, Corte (France); Voyant, Cyril [University of Corsica, CNRS UMR SPE, Corte (France); Hospital of Castelluccio, Radiotherapy Unit, Ajaccio (France)

    2010-12-15T23:59:59.000Z

    In this paper, we present an application of Artificial Neural Networks (ANNs) in the renewable energy domain. We particularly look at the Multi-Layer Perceptron (MLP) network which has been the most used of ANNs architectures both in the renewable energy domain and in the time series forecasting. We have used a MLP and an ad hoc time series pre-processing to develop a methodology for the daily prediction of global solar radiation on a horizontal surface. First results are promising with nRMSE {proportional_to} 21% and RMSE {proportional_to} 3.59 MJ/m{sup 2}. The optimized MLP presents predictions similar to or even better than conventional and reference methods such as ARIMA techniques, Bayesian inference, Markov chains and k-Nearest-Neighbors. Moreover we found that the data pre-processing approach proposed can reduce significantly forecasting errors of about 6% compared to conventional prediction methods such as Markov chains or Bayesian inference. The simulator proposed has been obtained using 19 years of available data from the meteorological station of Ajaccio (Corsica Island, France, 41 55'N, 8 44'E, 4 m above mean sea level). The predicted whole methodology has been validated on a 1.175 kWc mono-Si PV power grid. Six prediction methods (ANN, clear sky model, combination..) allow to predict the best daily DC PV power production at horizon d + 1. The cumulated DC PV energy on a 6-months period shows a great agreement between simulated and measured data (R{sup 2} > 0.99 and nRMSE < 2%). (author)

  15. DAYLIGHTING METRICS FOR RESIDENTIAL BUILDINGS

    E-Print Network [OSTI]

    unknown authors

    It is now widely accepted that the standard method for daylighting evaluation- the daylight factor- is due for replacement with metrics founded on absolute values for luminous quantities predicted over the course of a full year using sun and sky conditions derived from standardised climate files. The move to more realistic measures of daylighting introduces significant levels of additional complexity in both the simulation of the luminous quantities and the reduction of the simulation data to readily intelligible metrics. The simulation component, at least for buildings with standard glazing materials, is reasonably well understood. There is no consensus however on the composition of the metrics, and their formulation is an ongoing area of active research. Additionally, non-domestic and residential buildings present very different evaluation scenarios and it is not yet clear if a single metric would be applicable to both. This study uses a domestic dwelling as the setting to investigate and explore the applicability of daylighting metrics for residential buildings. In addition to daylighting provision for task and disclosing the potential for reducing electric lighting usage, we also investigate the formulation of metrics for non-visual effects such as entrainment of the circadian system.

  16. 4.430 Daylighting, Fall 2006

    E-Print Network [OSTI]

    Andersen, Marilyne

    This class provides the tools necessary for an efficient integration of daylighting issues in the overall design of a building. The fundamentals of daylighting and electric lighting are introduced and their relevance to ...

  17. Daylighting systems for the Kuwait National Museum

    E-Print Network [OSTI]

    Ahn, Byoungsoo

    2005-08-29T23:59:59.000Z

    Daylight has a deteriorating effect on the museum objects. For this reason, usually museums totally block the daylight. This research is the part of restoration works of Kuwait National Museum (KNM), which was destroyed during the Gulf War in 1990...

  18. CALIFORNIA ENERGY Summary Of Daylighting In Schools

    E-Print Network [OSTI]

    CALIFORNIA ENERGY COMMISSION Summary Of Daylighting In Schools: Reanalysis Report ReanalysisConocha of Federated Departments, Jim Van Dame of My-Lite Daylighting Systems and Products, Doug Gehring of Celotex

  19. Fall Back Daylight Savings time is November

    E-Print Network [OSTI]

    Linsley, Braddock K.

    Fall Back ­ Daylight Savings time is November 2nd.The Energy Policy Act of 2005 changed both the starting and ending dates. Beginning in 2007, daylight time starts on the second Sunday in March and ends

  20. Daylighting Prediction Software: Comparative Analysis and Application

    E-Print Network [OSTI]

    Estes, J. M. Jr.; Schreppler, S.; Newsom, T.

    2004-01-01T23:59:59.000Z

    Daylighting is a beneficial design strategy since it may provide energy savings and contribute to a more sustainable design. In recent studies, daylighting has also been shown to increase staff and student productivity and to decrease absenteeism...

  1. Daylight metrics and energy savings J. Mardaljevic

    E-Print Network [OSTI]

    LBNL-4585E Daylight metrics and energy savings Authors: J. Mardaljevic Institute of Energy 2009; 0: 1­23 ! Daylight metrics and energy savings J. Mardaljevic a , L. Heschong b , E.S. Lee c comfort performance. Current metrics do not account for the temporal and spatial aspects of daylight, nor

  2. I Color recognition models of daylight illumi-

    E-Print Network [OSTI]

    Draper, Bruce A.

    I Color recognition models of daylight illumi- nation and hybrid reflectance, and predicts of the color of ob- jects with respect to existing models of daylight [12] and surface reflectance [17, 14, 211 a surface reflectance model for hybrid surfaces and a context-based model of daylight illumination

  3. Applicability of daylighting computer modeling in real case studies: Comparison between measured and simulated daylight availability and lighting consumption. Building and Environment

    E-Print Network [OSTI]

    A. D. Atif

    this paper is published in / Une version de ce document se trouve dans : IEA (International Energy Agency) Task 21 / Annex 29: Daylight in Buildings, November 1998, 68 pp. www.nrc.ca/irc/ircpubs NRCC-42862 Subtask C: Daylighting Design Tools T21/C1-21/CAN/98-11 Applicability of Daylighting Computer Modeling in Real Case Studies: Comparison between Measured and Simulated Daylight Availability and Lighting Consumption A report of IEA SHC Task 21 / IEA ECBCS Annex 29 Daylight in Buildings Subtask C: Daylighting Design Tools Report T21/C1-21/CAN/98-11 Applicability of Daylighting Computer Modeling in Real Case Studies: Comparison between Measured and Simulated Daylight Availability and Lighting Consumption by Anca D. Galasiu * Morad R. Atif * A report of IEA SHC Task 21 / IEA ECBCS Annex 29 * National Research Council Canada, Institute for Research in Construction, Indoor Environment Research Program Subtask C: Daylighting Design Tools Report T21/C1-21/CAN/98-11 IEA Solar Heating and Cooling Programme (IEA SHC) The International Energy Agency (IEA) was established in 1974 as an autonomous agency within the framework of the Economic Cooperation and Development (OECD) to carry out a comprehensive program of energy cooperation among its 24 member countries and the Commission of the European Communities. An important part of the Agency's program involves collaboration in the research, development and demonstration of new energy technologies to reduce excessive reliance on imported oil, increase long-term energy security and reduce greenhouse gas emissions. The IEA's R&D activities are headed by the Committee on Energy Research and Technology (CERT) and supported by a small Secretariat staff, headquartered in Paris. In addition, three Working Parties are charged with monitorin...

  4. A SIMPLIFIED PROCEDURE FOR CALCULATING THE EFFECTS OF DAYLIGHT FROM CLEAR SKIES

    E-Print Network [OSTI]

    Bryan, Harvey J.

    2012-01-01T23:59:59.000Z

    J. , "The Calculation of Daylight Factor for Clear Skyand Predetermination of Daylight Illumination," ILLUMINATINGA MEASURING DIAGRAM FOR DAYLIGHT ILLUMINATION, Batsford,

  5. Does Extending Daylight Saving Time Save Energy? Evidence from an Australian Experiment

    E-Print Network [OSTI]

    KELLOGG, RYAN M; Wolff, Hendrik

    2007-01-01T23:59:59.000Z

    Tellier, F. (2005): Daylight Saving Time and EnergyCEC, 2001: Effects of Daylight Saving Time on California2004): The effects of daylight and daylight saving time on

  6. Investigating Daylight Quality In Malaysian Government Office Buildings Through Daylight Factor

    E-Print Network [OSTI]

    Surface Luminance; Mohd Zin K; Mohd Sabere Sulaiman; Yong Razidah Rashid; Dilshan Remaz Ossen; Aminatuzuhariah M; Lim Yaik Wah; Mansour Nikpour

    AbstractIn recent years, there has been an increasing interest in using daylight to save energy in buildings. In tropical regions, daylighting is always an energy saver. On the other hand, daylight provides visual comfort. According to standards, it shows that many criteria should be taken into consideration in order to have daylight utilization and visual comfort. The current standard in Malaysia, MS 1525 does not provide sufficient guideline. Hence, more research is needed on daylight performance. If architects do not consider daylight design, it not only causes inconvenience in working spaces but also causes more energy consumption as well as environmental pollution. This research had surveyed daylight performance in 5 selected office buildings from different area of Malaysian through experimental method. Several parameters of daylight quality such as daylight factor, surface luminance and surface luminance ratio were measured in different rooms in each building. The result of this research demonstrated that most of the buildings were not designed for daylight utilization. Therefore, it is very important that architects follow the daylight design recommendation to reduce consumption of electric power for artificial lighting while the sufficient quality of daylight is available. KeywordsDaylight factor, Field measurement, Daylighting quality, Tropical

  7. IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING, VOL. 7, NO. 5, MAY 2014 1745 The HelioClim-1 Database of Daily Solar Radiation

    E-Print Network [OSTI]

    Boyer, Edmond

    , MAY 2014 1745 The HelioClim-1 Database of Daily Solar Radiation at Earth Surface: An Example Abstract--The HelioClim-1 database contains daily values of the solar radiation reaching the ground and accurate knowledge of the solar radiation and its daily, seasonal and annual variations over recent years

  8. daylight 12/17/2007 1 Tracking the change in the amount of daylight

    E-Print Network [OSTI]

    Taylor, Peter

    daylight 12/17/2007 1 Tracking the change in the amount of daylight Ever notice that at some times successive days? (c) (Calculus) The daylight graph has been drawn with sine-curve. Find its equation. (d) Use get the following diagram. #12;daylight 12/17/2007 2 0 2 4 6 8 10 12 14 16 18 20 0 20 40 60 80 100 120

  9. Effect of daylighting on energy consumption and daylight quality in an existing elementary school

    E-Print Network [OSTI]

    Atre, Umesh Vinayak

    2005-08-29T23:59:59.000Z

    EFFECT OF DAYLIGHTING ON ENERGY CONSUMPTION AND DAYLIGHT QUALITY IN AN EXISTING ELEMENTARY SCHOOL A Thesis by UMESH VINAYAK ATRE Submitted to the Office of Graduate Studies of Texas A&M University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE May 2005 Major Subject: Architecture EFFECT OF DAYLIGHTING ON ENERGY CONSUMPTION AND DAYLIGHT QUALITY IN AN EXISTING ELEMENTARY SCHOOL A...

  10. Daylighting controls; Orphan of HVAC design

    SciTech Connect (OSTI)

    Rundquist, R.A. (R.A. Rundquist Associates Inc., Northampton, MA (US))

    1991-11-01T23:59:59.000Z

    This paper reports that in the array of strategies employed for energy-efficient design and retrofitting in commercial buildings, the use of daylighting controls is often overlooked or omitted. Thus, daylighting controls are a worthy but neglected orphan of the design process, stranded between the lighting designer, architect and engineer. Most daylighting analysis ignores HVAC effects, despite obvious interactions between windows, heat-from-lights, and thermal loads.

  11. Energy 101: Daylighting | Department of Energy

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

    Highly efficient, strategically placed windows maximize the use of natural daylight in a building, lowering the need for artificial lighting without causing heating or...

  12. Do Daylight-Saving Time Adjustments Really Impact Stock Returns?

    E-Print Network [OSTI]

    Steigerwald, Douglas G; Conte, Marc

    2007-01-01T23:59:59.000Z

    I. Taylor, 1935, World Daylight Saving Time, Chicago: Cur-Sleep at the Market: The Daylight Saving Anomaly, AmericanSleep at the Market: The Daylight Saving Anomaly: Reply,

  13. Simulating the Daylight Performance of Complex Fenestration Systems Using

    E-Print Network [OSTI]

    LBNL-4414E Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional, January 21, 2011. 1 Simulating the Daylight Performance of Complex Fenestration Systems Using (BSDFs) to model the daylighting performance of complex fenestration systems (CFS), enabling greater

  14. Integrated Daylight Harvesting and Occupancy Detection Using Digital Imaging

    E-Print Network [OSTI]

    Salvaggio, Carl

    Integrated Daylight Harvesting and Occupancy Detection Using Digital Imaging Abhijit Sarkar dynamic range CMOS video camera to integrate daylight harvesting and occupancy sensing functionalities by these sensors. The prototype involves three algorithms, daylight estimation, occupancy detection and lighting

  15. International Symposium on Daylighting Buildings (IEA SHC TASK 31) Integrating Automated Shading and Smart Glazings with Daylight

    E-Print Network [OSTI]

    International Symposium on Daylighting Buildings (IEA SHC TASK 31) Integrating Automated Shading and Smart Glazings with Daylight Controls Stephen Selkowitz Eleanor Lee Lawrence Berkeley National Laboratory Keywords: daylighting, controls, smart glazing, shading, field testing, IEA31 1. INTRODUCTION Most

  16. DAYLIGHTING DIRECTORY 1/1980

    E-Print Network [OSTI]

    ,

    2012-01-01T23:59:59.000Z

    PRESENTATIONS ' ~solar Radiation Data, Natural Lighting, andJUROVICS, S.A. "Solar Radiation Data, Natural Lighting, and

  17. June 1998Program Description Windows and Daylighting Group

    E-Print Network [OSTI]

    June 1998Program Description THERM 2.0 Windows and Daylighting Group Building Technologies, and Dariush Arasteh Windows and Daylighting Group Building Technologies Department Environmental Energy

  18. A Practical Analytic Model for Daylight Category: research

    E-Print Network [OSTI]

    Shirley, Peter

    A Practical Analytic Model for Daylight Category: research Abstract Sunlight and skylight that approximates full spectrum daylight for various atmospheric con­ ditions. These conditions are parameterized

  19. A Practical Analytic Model for Daylight Category: research

    E-Print Network [OSTI]

    Shirley, Peter

    A Practical Analytic Model for Daylight Category: research Abstract Sunlight and skylight that approximates full spectrum daylight for various atmospheric con- ditions. These conditions are parameterized

  20. Impact of Extended Daylight Saving Time on National Energy Consumption Report to Congress

    SciTech Connect (OSTI)

    Belzer, D. B.; Hadley, S. W.; Chin, S-M.

    2008-10-01T23:59:59.000Z

    The Energy Policy Act of 2005 (Pub. L. No. 109-58; EPAct 2005) amended the Uniform Time Act of 1966 (Pub. L. No. 89-387) to increase the portion of the year that is subject to Daylight Saving Time. (15 U.S.C. 260a note) EPAct 2005 extended the duration of Daylight Saving Time in the spring by changing its start date from the first Sunday in April to the second Sunday in March, and in the fall by changing its end date from the last Sunday in October to the first Sunday in November. (15 U.S.C. 260a note) EPAct 2005 also called for the Department of Energy to evaluate the impact of Extended Daylight Saving Time on energy consumption in the United States and to submit a report to Congress. (15 U.S.C. 260a note) This report presents the results of impacts of Extended Daylight Saving Time on the national energy consumption in the United States. The key findings are: (1) The total electricity savings of Extended Daylight Saving Time were about 1.3 Tera Watt-hour (TWh). This corresponds to 0.5 percent per each day of Extended Daylight Saving Time, or 0.03 percent of electricity consumption over the year. In reference, the total 2007 electricity consumption in the United States was 3,900 TWh. (2) In terms of national primary energy consumption, the electricity savings translate to a reduction of 17 Trillion Btu (TBtu) over the spring and fall Extended Daylight Saving Time periods, or roughly 0.02 percent of total U.S. energy consumption during 2007 of 101,000 TBtu. (3) During Extended Daylight Saving Time, electricity savings generally occurred over a three- to five-hour period in the evening with small increases in usage during the early-morning hours. On a daily percentage basis, electricity savings were slightly greater during the March (spring) extension of Extended Daylight Saving Time than the November (fall) extension. On a regional basis, some southern portions of the United States exhibited slightly smaller impacts of Extended Daylight Saving Time on energy savings compared to the northern regions, a result possibly due to a small, offsetting increase in household air conditioning usage. (4) Changes in national traffic volume and motor gasoline consumption for passenger vehicles in 2007 were determined to be statistically insignificant and therefore, could not be attributed to Extended Daylight Saving Time.

  1. Daylight metrics and energy savings

    SciTech Connect (OSTI)

    Mardaljevic, John; Heschong, Lisa; Lee, Eleanor

    2009-12-31T23:59:59.000Z

    The drive towards sustainable, low-energy buildings has increased the need for simple, yet accurate methods to evaluate whether a daylit building meets minimum standards for energy and human comfort performance. Current metrics do not account for the temporal and spatial aspects of daylight, nor of occupants comfort or interventions. This paper reviews the historical basis of current compliance methods for achieving daylit buildings, proposes a technical basis for development of better metrics, and provides two case study examples to stimulate dialogue on how metrics can be applied in a practical, real-world context.

  2. Assessing the Feasibility of Creek Daylighting in San Francisco, Part I: A Synthesis of Lessons Learned from Existing Urban Daylighting Projects

    E-Print Network [OSTI]

    Smith, Brooke Ray

    2007-01-01T23:59:59.000Z

    and Leonardson 2004). Why Daylight? In San Francisco, creekof San Francisco to daylight historical urban creeks withincity governments to daylight urban creeks, with successful

  3. Effective Daylighting: Evaluating Daylighting Performance in the San Francisco Federal Building from the Perspective of Building Occupants

    E-Print Network [OSTI]

    Konis, Kyle Stas

    2011-01-01T23:59:59.000Z

    quantitative performance indicators of daylight sufficiency?set of daylighting performance indicators for examination inassumptions of performance indicators under real work

  4. Effective Daylighting: Evaluating Daylighting Performance in the San Francisco Federal Building from the Perspective of Building Occupants

    E-Print Network [OSTI]

    Konis, Kyle Stas

    2012-01-01T23:59:59.000Z

    quantitative performance indicators of daylight sufficiency?set of daylighting performance indicators for examination inassumptions of performance indicators under real work

  5. Hiding patterns with daylight fluorescent inks

    E-Print Network [OSTI]

    Romain Rossier; Roger D. Hersch; School Of Computer; Communication Sciences; Ecole Polytechnique; Fdrale Lausanne

    We propose a method for hiding patterns within printed images by making use of classical and of two daylight fluorescent magenta and yellow inks. Under the D65 illuminant we establish in the CIELAB space the gamut of a classical cmyk printer and the gamut of the same printer using a combination of classical inks with daylight fluorescent inks. These gamuts show that a significant part of the classical ink gamut can be reproduced by combining classical inks with daylight fluorescent inks. By printing parts of images with a combination of classical and daylight fluorescent inks instead of using classical inks only, we can hide security patterns within printed images. Under normal daylight, we do not see any difference between the parts printed with classical inks only and the parts printed with daylight fluorescent inks and classical inks. By changing the illumination, e.g. by viewing the printed image under a tungsten lamp or under a UV lamp, the daylight fluorescent inks change their colors and reveal the security pattern formed by combinations of classical inks and of daylight fluorescent inks.

  6. Origins of Analysis Methods Used to Design High Performance Commercial Buildings: Part III, Lighting and Daylighting Simulation

    E-Print Network [OSTI]

    Oh, S.; Haberl, J.S.

    Origins of analysis methods used to design high performance commercial buildings: Part III, Lighting and daylighting simulation Sukjoon Oh Jeff S. Haberl Student Member ASHRAE Fellow ASHRAE This study is the third part of the review... methods used in lighting and daylighting simulation programs are described. In companion papers, the origins of the analysis methods of whole-building energy and solar energy analysis programs are reviewed(Oh and Haberl 2014a, 2014b). Introduction...

  7. SBi 2006:08 Assessment of daylight quality

    E-Print Network [OSTI]

    SBi 2006:08 Assessment of daylight quality in simple rooms Impact of three window configurations on daylight conditions, Phase 2 #12;#12;SBi 2006:08 Danish Building Research Institute 2006 Assessment of daylight quality in simple rooms Impact of three window configurations on daylight conditions, Phase 2

  8. Daily results of the initial operation of the Los Alamos salt-gradient solar pond

    SciTech Connect (OSTI)

    Hedstrom, J.C.; Jones, G.F.; Meyer, K.A.

    1983-01-01T23:59:59.000Z

    The results of analysis of the initial data obtained on the Los Alamos National Laboratory salt-gradient solar pond, a 232 m/sup 2/ pond constructed for the primary purpose of studying pond hydrodynamics, are presented. The pond and the data-acquisition system were complete and in full operation by August 14, 1982. By September 21, 1982, the lower convecting zone had reached a temperature of 56/sup 0/C. An energy balance was performed over this period and is presented. Soil conductivity determinations have been made from the data, and the method is discussed. As a result of a leak discovered in the pond in September, a method of determining the leak rate was developed, and the results are included.

  9. Monitored Energy Performance of Electrochromic Windows Controlled for Daylight and Visual Comfort

    E-Print Network [OSTI]

    Lee, Eleanor S.; DiBartolomeo, Dennis L.; Klems, Joseph; Yazdanian, Mehry; Selkowitz, Stephen E.

    2005-01-01T23:59:59.000Z

    Windows Controlled for Daylight and Visual Comfort Eleanorof means to bring in daylight while minimizing window glare.was controlled to admit daylight while the lower zone was

  10. Evaluation of Climate-Based Daylight Performance in Tropical Office Buildings- A Case Study

    E-Print Network [OSTI]

    Szu-Cheng, CHIEN; King Jet, TSENG

    2013-01-01T23:59:59.000Z

    and Z. Rogers, Dynamic Daylight Performance Metrics forof interior design on the daylight availability in open plan2002. [14] Z. Rogers, Daylight metric development using

  11. SIMULATION-ASSISTED DAYLIGHT PERFORMANCE ANALYSISIN A HIGH-RISE OFFICE BUILDING IN SINGAPORE

    E-Print Network [OSTI]

    CHIEN, Szu Cheng; TSENG, King Jet

    2013-01-01T23:59:59.000Z

    Flodberg, K. (2013). Daylight utilisation in perimeterJ. , (2005a). Useful Daylight Illuminance: A NewParadigm to Access Daylight in Buildings. Lighting

  12. Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional Scattering Distribution Functions within Radiance

    E-Print Network [OSTI]

    Ward, Gregory

    2011-01-01T23:59:59.000Z

    761-81. Tregenza PR. 1983. Daylight coefficients. Lighting773. Reinhart CF. 2001. Daylight availability and manualA visualization of an incident daylight matrix (cumulative

  13. Does Daylight Saving Time Save Energy? Evidence from a Natural Experiment in Indiana

    E-Print Network [OSTI]

    Kotchen, Matthew J; Grant, Laura E.

    2008-01-01T23:59:59.000Z

    The Energy Impact of Daylight Saving Time Implementation insleep at the market: The daylight saving anomaly. Americansleep at the market: The daylight saving anomaly: Reply.

  14. A PROCEDURE FOR CALCULATING INTERIOR DAYLIGHT ILLUMINATION WITH A PROGRAMMABLE HAND CALCULATOR

    E-Print Network [OSTI]

    Bryan, H.J.

    2010-01-01T23:59:59.000Z

    FOR CALCULATING INTERIOR DAYLIGHT ILLUMINATION WITH ACommittee E-3.2, "Daylight: International RecommendationsCalcula- tion of Natural Daylight," CIE PUBLICATION No. 16,

  15. Performance of Integrated Systems of Automated Roller Shade Systems and Daylight Responsive Dimming Systems

    E-Print Network [OSTI]

    Park, Byoung-Chul

    2011-01-01T23:59:59.000Z

    Roller Shade Systems and Daylight Responsive Dimming SystemsRoller Shade Systems and Daylight Responsive Dimming SystemsBerkeley, CA 94720 Abstract Daylight responsive dimming

  16. Performance-based assessment of daylight on tropical buildings- a case Study

    E-Print Network [OSTI]

    Szu Cheng, CHIEN

    2013-01-01T23:59:59.000Z

    81% 81% 95% 96% 74% 68% Daylight autonomy max (DAmax) >5%32% 28% 11% 9% 11% 6% Useful daylight illuminance (UDI) Daylight Performance Metrics for

  17. 4.492 Daylighting, Fall 2004

    E-Print Network [OSTI]

    Andersen, Marilyne

    The course focuses on the use and optimization of daylight in buildings and on its complementarity to artificial (electric) lighting, to aim at reducing the building's environmental impact while improving the visual comfort ...

  18. Daylighting Application and Effectiveness in Industrial Facilities

    E-Print Network [OSTI]

    McCowan, B.; Birleanu, D.

    2005-01-01T23:59:59.000Z

    during the industrial revolution, architects utilized various daylighting strategies such as window walls, skylighting, monitors, etc. However, glazing technologies were primitive compared with our modern choices, When more efficient and effective...

  19. Utilizing Daylighting Controls in a Manufacturing Facility

    E-Print Network [OSTI]

    Shrestha, S. S.; Maxwell, G. M.

    Utilizing Daylighting Controls in a Manufacturing Facility Som S. Shrestha Dr. Gregory M. Maxwell PhD Candidate Associate Professor som@iastate.edu gmaxwell@iastate.edu Iowa State University Ames, IA ABSTRACT Opportunities exist... to reduce artificial lighting in manufacturing facilities which have skylights and/or fenestration that provide sufficient quantities of daylight to the work space. Using photometric sensors to measure the illuminance in the space, artificial lights can...

  20. Focus group discussions of daylighting practices

    SciTech Connect (OSTI)

    Roberson, B.F.; Harkreader, S.A.

    1988-11-01T23:59:59.000Z

    This research was sponsored by the US Department of Energy (DOE) Office of Buildings and Community systems and conducted by Pacific Northwest Laboratory (PNL) as part of an ongoing effort to enhance the commercial use of federally developed technologies. One such technology is the use of daylighting practices in the design of nonresidential buildings. This document is a report of the findings from meetings of focus groups conducted to gain insight into building designers' perceptions and attitudes about daylighting systems.

  1. Abstract A Hierarchical Algorithm for Radiosity Daylighting

    E-Print Network [OSTI]

    Gonzalo Besuievsky; Ignacio Martin

    A new daylight simulation method for radiosity environments is presented. Daylight illumination is transported in a first step where sun and sky are represented as a set of directional sources. Light is transported using parallel projections of these sources. The scene mesh is adaptively subdivided using energy and visibility criteria obtained from a extended scan-line algorithm that computes a layered depth image for each projection. In a second step, diffuse intereflection is computed through a hierarchical Monte Carlo radiosity algorithm. The method is feasible for it extension for environments containing specular surfaces. Relative short time view-independent global illumination results can be obtained with the proposed method, which make it suitable for daylight building design and analysis applications for both indoors and outdoors environments. 1

  2. Singapore's Zero-Energy Building's daylight monitoring system

    E-Print Network [OSTI]

    Grobe, Lars

    2010-01-01T23:59:59.000Z

    DGP Established performance indicators are illuminanceled to new performance indicators. The Useful Daylightsimulation. The performance indicator used was the Daylight

  3. Singapore's Zero-Energy Building's daylight monitoring system

    E-Print Network [OSTI]

    Grobe, Lars

    2010-01-01T23:59:59.000Z

    Daylight Illuminance [12] (UGI) relates the illuminance onin three metrics for the UGI, defining exceeding (>2000lx),

  4. A Spatially Augmented Reality Sketching Interface for Architectural Daylighting Design

    E-Print Network [OSTI]

    Varela, Carlos

    1 A Spatially Augmented Reality Sketching Interface for Architectural Daylighting Design Yu Sheng to architectural daylight modeling that allows designers to explore alternative designs and new technologies are then projected on the real model by four calibrated projectors to help users study the daylighting illumination

  5. Quantifying the Impact of Daylight Saving Clock Changes

    E-Print Network [OSTI]

    Hill, Simon I.

    Quantifying the Impact of Daylight Saving Clock Changes on Energy Consumption Simon I. Hill of Daylight Saving Clock Changes on Energy Consumption Simon I. Hill, Frédéric Desobry and Yu-Foong Chong May DST Daylight Saving Time EIA Energy Information Administration GDP Gross Domestic Product GMT

  6. 15 Acoustic Daylight Imaging in the Michael J. Buckingham

    E-Print Network [OSTI]

    Buckingham, Michael

    15 Acoustic Daylight Imaging in the Ocean Michael J. Buckingham Scripps Institution of Oceanography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 418 15.4 Acoustic daylight images . . . . . . . . . . . . . . . . . . . . . . . . 420 15.5 Concluding. Sensors and Imaging ISBN 0­12­379771­3/$30.00 #12;416 15 Acoustic Daylight Imaging in the Ocean Acoustic

  7. Daylighting a Green High School Smart Schools Symposium 2013

    E-Print Network [OSTI]

    California at Davis, University of

    Daylighting a Green High School Smart Schools Symposium 2013 #12;AMERICAN CANYON HIGH SCHOOL NAPA CHPS Verified School in CA Daylighting a major focus of sustainable design strategy Began design and orientations First and second story Goals: best daylighting possible flexible lighting system simple and cost

  8. What is Daylight: Understanding the Sky as a

    E-Print Network [OSTI]

    Ahmad, Sajjad

    What is Daylight: Understanding the Sky as a Source May 6, 2007; 2:00 to 5:00 p.m. Michael D and diagrams · Sky Conditions · Daylight Availability · Climate & Design Criteria · Case Studies · Summary · Q the ability of future generations to meet their own needs." · Daylighting strategies should embrace

  9. Loss of Daylight Vision in Retinal Degeneration: Are

    E-Print Network [OSTI]

    Tabin, Cliff

    Loss of Daylight Vision in Retinal Degeneration: Are Oxidative Stress and Metabolic Dysregulation, particularly in cones, the type of photoreceptors that mediate daylight and color vision. The evidence, providing our daylight vision, and have many of the same features and vulnerabilities as rod photoreceptors

  10. Combining daylighting, personal controls, and load shedding offers

    E-Print Network [OSTI]

    Combining daylighting, personal controls, and load shedding offers enormous potential for reducing lighting system to respond to available daylight and demand response control · Allows building occupants--Consider the improved cost-effectiveness of wireless dimming to promote daylighting controls and load- shedding

  11. Inferring Architectural Designs from Physical Sketches: Application to Daylighting Analysis

    E-Print Network [OSTI]

    Varela, Carlos

    Inferring Architectural Designs from Physical Sketches: Application to Daylighting Analysis Barbara and a closed, 3D triangle mesh representation is constructed. We apply the system to architectural daylighting, daylighting analy- sis, and image processing. ACM Classification Keywords H.5.1 Information Interfaces

  12. The Impact on Energy Consumption of Daylight Saving Clock Changes

    E-Print Network [OSTI]

    Hill, Simon I.

    The Impact on Energy Consumption of Daylight Saving Clock Changes S. I. Hilla, , F. Desobrya , E. W demonstrating po- tential energy savings which could be obtained were Great Britain to maintain Daylight Savings result from an extension of Daylight Saving Time (DST) over the months currently on Greenwich Mean Time

  13. STATE OF CALIFORNIA AUTOMATIC DAYLIGHTING CONTROL ACCEPTANCE DOCUMENT

    E-Print Network [OSTI]

    STATE OF CALIFORNIA AUTOMATIC DAYLIGHTING CONTROL ACCEPTANCE DOCUMENT CEC-LTG-3A (Revised 07/10) CALIFORNIA ENERGY COMMISSION CERTIFICATE OF ACCEPTANCE LTG-3A Automatic Daylighting Control Acceptance fraction of rated light output. #12;STATE OF CALIFORNIA AUTOMATIC DAYLIGHTING CONTROL ACCEPTANCE DOCUMENT

  14. Singapore's Zero-Energy Building's Daylight Monitoring System

    E-Print Network [OSTI]

    LBNL-3708E Singapore's Zero-Energy Building's Daylight Monitoring System Author(s), L. Grobe; S thereof or The Regents of the University of California. #12;Singapore's Zero-Energy Building's daylight, 94720 California, USA 1. Abstract A setup to monitor the daylighting performance of different glazing

  15. COMPUTATIONAL SIMULATIONS FOR PREDICTING VERTICAL DAYLIGHT LEVELS IN ATRIUM BUILDINGS

    E-Print Network [OSTI]

    Jiangtao Du; Steve Sharples

    This paper investigates the impact of well geometry and surface reflectance on vertical daylight levels in atria with square forms under a CIE standard overcast sky. By reviewing some previous investigations and comparing with scale model measurements the vertical daylight factor calculated using Radiance are validated. More simulated vertical daylight factors for a very wide range of atrium geometries and reflectances are given. From the results the attenuation and distribution of the vertical daylight levels on the wall of a square atrium with different reflectances are displayed. Also, the comparisons between simulations and two analytical theories have been performed. Finally some conclusions for supporting daylight design in atria are presented.

  16. Does Daylight Savings Time Affect Traffic Accidents?

    E-Print Network [OSTI]

    Deen, Sophia 1988-

    2012-04-20T23:59:59.000Z

    This paper studies the effect of changes in accident pattern due to Daylight Savings Time (DST). The extension of the DST in 2007 provides a natural experiment to determine whether the number of traffic accidents is affected by shifts in hours...

  17. PERFORMANCE MODELING OF DAYLIGHT INTEGRATED PHOTOSENSOR- CONTROLLED LIGHTING SYSTEMS

    E-Print Network [OSTI]

    S. Jain; R. R. Creasey; J. Himmelspach; K. P. White; M. Fu; Richard G. Mistrick

    Some building energy codes now require the incorporation of daylight into buildings and automatic photosensor-controlled switching or dimming of the electric lighting system in areas that receive daylight. This paper describes enhancements to the open-source Daysim daylight analysis software that permit users to model a photosensor control system as it will perform in a real space, considering the directional sensitivity of the photosensor, its mounting position, the space and daylight aperture geometry, window shading configuration; the electric lighting equipment and control zones; exterior obstructions; and site weather conditions. System output includes assessment of the daylight distribution in a space throughout the year, the photosensors ability to properly track the daylight and modify electric lighting system output, and the energy savings provided by the modeled control system. The application of daylight coefficients permits annual simulations to be conducted efficiently using hourly or finer weather data time increments. 1

  18. daylight | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectric Coop,SaveWhiskey Flats GeothermalElectric Coop Home7databus

  19. Assessing the Feasibility of Creek Daylighting in San Francisco, Part II: A Preliminary Analysis of Yosemite Creek

    E-Print Network [OSTI]

    Smith, Brooke Ray

    2007-01-01T23:59:59.000Z

    or purchased properties) to daylight the stream? Or is itrestoration (Smith 2007). Why Daylight in San Francisco? Inof San Francisco to daylight Yosemite Creek, how and where

  20. Correlation time of ocean ambient noise intensity in San Diego Bay and target recognition in acoustic daylight images

    E-Print Network [OSTI]

    Wadsworth, Adam J.

    2010-01-01T23:59:59.000Z

    Intensity Data Chapter 3 Acoustic Daylight Image TargetC. L. Epifanio. Acoustic Daylight: Passive Acoustic ImagingRecognition in Acoustic Daylight Images A Thesis submitted

  1. Solar thermal collector system modeling and testing for novel solar cooker

    E-Print Network [OSTI]

    Foley, Brian, S.B. (Brian M.). Massachusetts Institute of Technology

    2014-01-01T23:59:59.000Z

    Solar cookers are aimed at reducing pollution and desertification in the developing world. However, they are often disregarded as they do not give users the ability to cook after daylight hours. The Wilson solar cooker is ...

  2. Daylighting simulation: methods, algorithms, and resources

    SciTech Connect (OSTI)

    Carroll, William L.

    1999-12-01T23:59:59.000Z

    This document presents work conducted as part of Subtask C, ''Daylighting Design Tools'', Subgroup C2, ''New Daylight Algorithms'', of the IEA SHC Task 21 and the ECBCS Program Annex 29 ''Daylight in Buildings''. The search for and collection of daylighting analysis methods and algorithms led to two important observations. First, there is a wide range of needs for different types of methods to produce a complete analysis tool. These include: Geometry; Light modeling; Characterization of the natural illumination resource; Materials and components properties, representations; and Usability issues (interfaces, interoperability, representation of analysis results, etc). Second, very advantageously, there have been rapid advances in many basic methods in these areas, due to other forces. They are in part driven by: The commercial computer graphics community (commerce, entertainment); The lighting industry; Architectural rendering and visualization for projects; and Academia: Course materials, research. This has led to a very rich set of information resources that have direct applicability to the small daylighting analysis community. Furthermore, much of this information is in fact available online. Because much of the information about methods and algorithms is now online, an innovative reporting strategy was used: the core formats are electronic, and used to produce a printed form only secondarily. The electronic forms include both online WWW pages and a downloadable .PDF file with the same appearance and content. Both electronic forms include live primary and indirect links to actual information sources on the WWW. In most cases, little additional commentary is provided regarding the information links or citations that are provided. This in turn allows the report to be very concise. The links are expected speak for themselves. The report consists of only about 10+ pages, with about 100+ primary links, but with potentially thousands of indirect links. For purposes of the printed version, a list of the links is explicitly provided. This document exists in HTML form at the URL address: http://eande.lbl.gov/Task21/dlalgorithms.html. An equivalent downloadable PDF version, also with live links, at the URL address: http://eande.lbl.gov/Task21/dlalgorithms.pdf. A printed report can be derived directly from either of the electronic versions by simply printing either of them. In addition to the live links in the electronic forms, all report forms, electronic and paper, also have explicitly listed link addresses so that they can be followed up or referenced manually.

  3. Solar radiation data manual for buildings

    SciTech Connect (OSTI)

    Marion, W.; Wilcox, S.

    1995-09-01T23:59:59.000Z

    Architects and engineers use solar resource information to help design passive solar and daylighting features for buildings. Solar resource information includes data on how much solar radiation and illuminance are available for different window orientations, and how they vary. This manual provides solar radiation and illuminance values for a horizontal window and four vertical windows (facing north, east, south, and west) for 239 stations in the United States and its territories. The solar radiation values are monthly and yearly averages for the period of 1961--1990. Included are values showing the solar radiation incident on the window and the amount transmitted into the living space, with and without exterior shading of the window. Illuminance values are presented r average dismal profiles for 4 months of the year. In addition to the solar radiation and illuminance data, this manual contains tables listing climatic condition such as average temperature, average daily minimum and maximum temperature, record minimum and maxi mum temperature, average heating and cooling degree days, average humidity ratio, average wind speed, an average clearness index. The solar radiation, illuminance, and climatic data a presented in tables. Data for each station are presented on a single page, and the pages are arranged alphabetically by the state or territory two-letter abbreviation. Within a state or territory, the pages are arranged alp betically by city or island.

  4. OpenStudio Enhancements for Whole-Building Daylighting, Airflow...

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

    aims to boost retrofit projects and enable project teams to easily integrate energy, daylight, and airflow modeling into their design workflows. View the Presentation OpenStudio...

  5. Integrating automated shading and smart glazings with daylight controls

    E-Print Network [OSTI]

    Selkowitz, Stephen; Lee, Eleanor

    2004-01-01T23:59:59.000Z

    Automated Shading and Smart Glazings with Daylight Controlsdaylighting, controls, smart glazing, shading, fielddeveloping switchable smart glazings for over a decade and

  6. Acceleration of the matrix multiplication of Radiance three phase daylighting simulations

    E-Print Network [OSTI]

    LBNL-6461E Acceleration of the matrix multiplication of Radiance three phase daylighting multiplication of Radiance three phase daylighting simulations with parallel computing on heterogeneous hardware. Radiance, a lighting simulation program, has been used to conduct daylighting simulations for complex

  7. Assessing the Feasibility of Creek Daylighting in San Francisco, Part I: A Synthesis of Lessons Learned from Existing Urban Daylighting Projects

    E-Print Network [OSTI]

    Smith, Brooke Ray

    2007-01-01T23:59:59.000Z

    daylighting can be cost- comparable with conventional, infrastructure- and material-intensive engineering solutions

  8. Analysis of the California Solar Resource--Volume 3: Appendices

    E-Print Network [OSTI]

    erdahl, P.

    2011-01-01T23:59:59.000Z

    FOR DAILY SOLAR RADIATION DATA ABSTRACT Daily totala corrected solar radiation data base for 19 locations infor Daily Solar Radiation Data Appendix A SUMMARIES OF

  9. Green Classroom: Daylighting-conscious Design for Kuwait Autism Center

    E-Print Network [OSTI]

    Abdullah Al-mohaisen; Omar Khattab

    Consideration to the natural elements, such as daylighting, at the earliest in the architectural design process is suggested by many as necessary for sustainable buildings. The implementation of a successful daylighting strategy in the design of buildings improves spatial quality and saves energy required, otherwise, for artificial lighting. Daylighting becomes a design mandate in the case of certain spaces; e.g. classrooms in educational buildings. Many researchers have indicated a correlation between the way classrooms are designed and students ' performance. This paper discusses a case study of the environmental design of Kuwait Autism Centre that adopted the provision of adequate daylighting in educational spaces as a major design focus. An extensive daylighting evaluation was conducted on all educational facilities of the proposed conceptual design of the centre. The recommendations from the evaluation were implemented in the design development stages. Earlier conceptual design drawings as well as the final designs are described. The paper summarises the daylighting design recommendations and explains the daylighting simulation process and analysis for decision making in design. Additionally it shows the annual energy savings as a result of the daylighting-conscious design of the classrooms.

  10. Color and spectral analysis of daylight in southern Europe

    E-Print Network [OSTI]

    Javier Hernndez-andrs; Javier Romero; Juan L. Nieves; Raymond L. Lee

    2001-01-01T23:59:59.000Z

    We have analyzed the colorimetric and spectral characteristics of 2600 daylight spectra (global spectral irradiances on a horizontal surface) measured for all sky states during a 2-year period at Granada, Spain. We describe in detail the chromaticity coordinates, correlated color temperatures (CCT), luminous efficacies, and relative UV and IR contents of Granada daylight. The chromaticity coordinates of Granada daylight lie far above the CIE locus at high CCTs (?9000 K), and a CCT of 5700 K best typifies this daylight. Our principalcomponents analysis shows that Granada daylight spectra can be adequately represented by using sixdimensional linear models in the visible, whereas seven-dimensional models are required if we include the UV or near-IR. Yet on average only three-dimensional models are needed to reconstruct spectra that are colorimetrically indistinguishable from the original spectra. 2001 Optical Society of America OCIS codes: 010.1290, 330.1710, 330.1730. 1.

  11. Daylighting, dimming, and the electricity crisis in California

    SciTech Connect (OSTI)

    Rubinstein, Francis; Neils, Danielle; Colak, Nesrin

    2001-09-17T23:59:59.000Z

    Dimming controls for electric lighting have been one of the mainstays of the effort to use daylighting to reduce annual lighting energy consumption. The coincidence of daylighting with electric utility peak demand makes daylighting controls an effective strategy for reducing commercial building peak electric loads. During times of energy shortage, there is a greatly increased need to reduce electricity use during peak periods, both to ease the burden on electricity providers and to control the operating costs of buildings. The paper presents a typical commercial building electric demand profile during summer, and shows how daylighting-linked lighting controls and load shedding techniques can reduce lighting at precisely those times when electricity is most expensive. We look at the importance of dimming for increasing the reliability of the electricity grid in California and other states, as well as examine the potential cost-effectiveness of widespread use of daylighting to save energy and reduce monthly electricity bills.

  12. Relative Accuracy of 1-Minute and Daily Total Solar Radiation Data for 12 Global and 4 Direct Beam Solar Radiometers: Preprint

    SciTech Connect (OSTI)

    Myers, D. R.; Wilcox, S. M.

    2009-03-01T23:59:59.000Z

    This report evaluates the relative performance of 12 global and four direct beam solar radiometers deployed at a single site over a 12-month period. Test radiometer irradiances were compared with a reference irradiance consisting of either an absolute cavity radiometer (during calibrations) or a low uncertainty thermopile pyrheliometer (during the evaluation period) for pyrheliometers; and for pyranometers a reference global irradiance computed from the reference pyrheliometer and diffuse irradiance from a shaded pyranometer.

  13. (Daylight saving time (DST), implemented as an energy saving policy, impacts many other aspects of

    E-Print Network [OSTI]

    Levinson, David M.

    Abstract( (Daylight saving time (DST), implemented as an energy saving policy, impacts many other(of(DST( The idea of daylight saving time is to transfer an hour of morning daylight to the evening. It is achieved (3am-9am, 9am-3pm, 3pm-9pm, 9pm-12am). The(effects(of(daylight

  14. Anomalous trichromats' judgments of surface color in natural scenes under different daylights

    E-Print Network [OSTI]

    Foster, David H.

    Anomalous trichromats' judgments of surface color in natural scenes under different daylights daylight illuminants were presented on a high-resolution color monitor to 7 deuteranomalous, 7 to the daylight locus rather than along the daylight locus ~Foster & Linnell, 1995; Amano et al., 2003

  15. The effects of daylight saving time on vehicle crashes in Minnesota Arthur Huang a,

    E-Print Network [OSTI]

    Levinson, David M.

    The effects of daylight saving time on vehicle crashes in Minnesota Arthur Huang a, , David: Daylight saving time Vehicle crashes Exposure Traffic volume Introduction: Daylight saving time (DST analysis shows that overall DST reduces crashes. Impact on industry: Daylight saving time can lead to fewer

  16. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    for Daily Solar Radiation Data. Proceedings of the 1977from total horizontal radiation data, they both suffer froma. SOLAR RADIATION Solar radiation data provide a measure of

  17. Improving the daylighting conditions of existing buildings : the benefits and limitations of integrating anidolic daylighting systems using the American classroom as a model

    E-Print Network [OSTI]

    Kleindienst, Sin A. (Sin Alexandra)

    2006-01-01T23:59:59.000Z

    Awareness of the benefits of good daylighting has risen in recent years, and the designs of many new buildings take daylighting into consideration. However, the majority of our built environment is older than this recent ...

  18. A validation of the Radiance three-phase simulation method for modeling annual daylight performance of optically-complex fenestration systems

    E-Print Network [OSTI]

    McNeil, Andrew

    2013-01-01T23:59:59.000Z

    J. , 2011. Simulating the Daylight Performance of Complexof dynamic RADIANCE-based daylight simulations for a testS.E. , 1998. Energy and Daylight Performance of Angular

  19. Daylight variability and contrast-driven architectural effect

    E-Print Network [OSTI]

    Rockcastle, Siobhan Francois

    2011-01-01T23:59:59.000Z

    Natural light is a dynamic and ephemeral tool for expressing the quality of architectural space. As a compliment to more traditional avenues of daylighting research that assess performance in terms of quantitative illuminance ...

  20. DAYLIGHTING IN CAMBRIDGE LIBRARIES: SHIFTING FOCUS OVER TIME

    E-Print Network [OSTI]

    Ayona Datta

    This paper aims to explore the various transformations of Cambridge libraries over the ages focusing mainly on the changing role of daylighting in library design. The libraries have been categorised chronologically into four different groups: Medieval libraries, libraries between 16 th cent and Reformation, libraries between Reformation and 19 th cent and modern libraries. The study shows that with the shift from the rules of classicism in medieval libraries to individual styles in modern libraries, the architect has opened up enormous possibilities for design innovations in daylighting. Unlike other environmental services the elements of daylighting are undoubtedly the most visual and expressive. The particular challenge of modern library design is to manipulate natural light for reading and book storage while avoiding reflections on the VDU. It is still a field not fully explored and it remains to be seen how daylighting design can successfully meet all the needs of a modern library. 1.

  1. Interfacing BIM with Building Thermal and Daylighting Modeling

    E-Print Network [OSTI]

    Yan, Wei; Clayton, Mark; Haberl, Jeff; WoonSeong, Jeong; Bun Kim, Jong; Sandeep, Kota; Bermudez, Jose; Dixit, Manish

    INTERFACING BIM WITH BUILDING THERMAL AND DAYLIGHTING MODELING Wei Yan, Mark Clayton, Jeff Haberl, WoonSeong Jeong, Jong Bum Kim, Sandeep Kota, Jose Luis Bermudez Alcocer, and Manish Dixit Texas A&M University, College Station, USA... the BIM authoring tools Application Programming Interface (API) to translate BIM into Object-Oriented Physical Models (in Modelica) for building thermal simulation, and input files of ray-tracing software (Radiance) for daylighting simulation. Based...

  2. The New York Times headquarters daylighting mockup: Monitored performance of the daylighting control system

    E-Print Network [OSTI]

    Lee, Eleanor S.; Selkowitz, Stephen E.

    2006-01-01T23:59:59.000Z

    with LBNL sensors to monitor outdoor solar conditions,RTD temperature sensor (0.39C) shielded from direct solar

  3. Effective Daylighting: Evaluating Daylighting Performance in the San Francisco Federal Building from the Perspective of Building Occupants

    E-Print Network [OSTI]

    Konis, Kyle Stas

    2012-01-01T23:59:59.000Z

    Annex 29, Daylight in Buildings. October, 1997. Atif. M.R.case studies. Energy and Buildings 35 441-461. Attmann,George. 2010. Sustainable Buildings in Practice: What the

  4. Empirical assessment of a prismatic daylight-redirecting window film in a full-scale office testbed

    E-Print Network [OSTI]

    Thanachareonkit, Anothai

    2014-01-01T23:59:59.000Z

    Jonsson JC. 2013. Daylight performance of a microstructuredH. Device for guiding daylight, US Patent 4,654,243 (JL, Selkowitz S. 2000. Daylight in buildings: A source book

  5. Improving the reliability and accuracy of a multipyranometer array measuring solar radiation

    E-Print Network [OSTI]

    Klima, Peter Miloslaw

    2000-01-01T23:59:59.000Z

    The measurement of solar radiation is crucial for the use of solar energy in fields including power generation, agriculture and meteorology. In the building sciences, It is essential for daylighting studies, energy use calculations, and thermal...

  6. Magnetospheric application of high-altitude long-duration balloon technology: Daylight auroral observations

    E-Print Network [OSTI]

    Lummerzheim, Dirk

    Magnetospheric application of high-altitude long-duration balloon technology: Daylight auroral; accepted 12 February 2007 Abstract Daylight auroral imaging is a proposed application of the NASA high

  7. Graphical Representation of Climate-Based Daylight Performance to Support Architectural Design

    E-Print Network [OSTI]

    Kleindienst, Sin

    Many conventional daylighting design tools are limited in that each simulation represents only one time of year and time of day (or a single, theoretical overcast sky condition). Since daylight is so variable due to the ...

  8. Question of the Week: How Do You Feel About the Extended Daylight...

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

    Feel About the Extended Daylight Saving Time? Question of the Week: How Do You Feel About the Extended Daylight Saving Time? March 12, 2009 - 6:00am Addthis Have you been drinking...

  9. Historical Survey of Daylighting Calculations Methods and Their Use in Energy Performance Simulations

    E-Print Network [OSTI]

    Kota, S.; Haberl, J. S.

    This paper traces the historical development of different daylighting calculation methods. Over the years there have been several developments in daylighting calculation methods. The last two decades have seen a number of new ideas and approaches...

  10. Lighting energy savings potential of split-pane electrochromic windows controlled for daylighting with visual comfort

    E-Print Network [OSTI]

    Fernandes, Luis

    2014-01-01T23:59:59.000Z

    Energy Performance of Electrochromic Windows Controlled forenergy performance of electrochromic windows. Proceedingssignal for daylight (electrochromic window, no overhang).

  11. DOES DAYLIGHT SAVING TIME SAVE ENERGY? EVIDENCE FROM A NATURAL EXPERIMENT IN INDIANA

    E-Print Network [OSTI]

    Kotchen, Matthew J.

    DOES DAYLIGHT SAVING TIME SAVE ENERGY? EVIDENCE FROM A NATURAL EXPERIMENT IN INDIANA Matthew J to estimate the effect of daylight saving time (DST) on residential electricity consumption. Our main finding per year. I. Introduction SEVENTY-SIX nations currently practice daylight sav- ing time (DST), which

  12. DELIGHT2 DAYLIGHTING ANALYSIS IN ENERGY PLUS: INTEGRATION AND PRELIMINARY USER RESULTS

    E-Print Network [OSTI]

    DELIGHT2 DAYLIGHTING ANALYSIS IN ENERGY PLUS: INTEGRATION AND PRELIMINARY USER RESULTS William L for daylight and electric lighting system analysis in buildings. DElight calculates interior illuminance levels from daylight, and the subsequent contribution required from electric lighting to meet a desired

  13. USING VIDEO FOR ANALYZING DAYLIGHT SIMULATION TOOLS Daniel C. Glaser1

    E-Print Network [OSTI]

    Varela, Carlos

    USING VIDEO FOR ANALYZING DAYLIGHT SIMULATION TOOLS Daniel C. Glaser1 , F. Whitney Smith2 , Barb socio-technical techniques can be employed to analyze video data of people using daylight simulation, a classic daylighting analysis tool; and in the second a lighting professional is asked to use a new data

  14. Calculating correlated color temperatures across the entire gamut of daylight and skylight chromaticities

    E-Print Network [OSTI]

    Lee Jr., Raymond L.

    Calculating correlated color temperatures across the entire gamut of daylight and skylight daylight and skylight spectra to test an equation that accurately maps CIE 1931 chromaticities x and y by daylight and skylight. © 1999 Optical Society of America OCIS codes: 010.1290, 330.1710, 330.1730. 1

  15. Development of a new model to predict indoor daylighting : integration in CODYRUN software and validation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Development of a new model to predict indoor daylighting : integration in CODYRUN software in the scientific literature for determining indoor daylighting values. They are classified in three categories. The originality of our paper relies on the coupling of several simplified models of indoor daylighting

  16. The following VS tools were compared: 2D OPENBABEL, DAYLIGHT2

    E-Print Network [OSTI]

    Ritchie, Dave

    The following VS tools were compared: 2D ­ OPENBABEL, DAYLIGHT2 , MACCS. BCI, MOLPRINT2D3 3D ­ ROCS Software Inc., Cepos Insilico Ltd., Chemical Computing Group, DAYLIGHT, Chemical Information Systems and Digital Chemistry for providing Academic Licences for ROCS, ParaSurf, MOE, DAYLIGHT, and BCI, respectively

  17. Daylighting control performance of a thin-film ceramic electrochromic window: field study results

    E-Print Network [OSTI]

    1 Daylighting control performance of a thin-film ceramic electrochromic window: field study results of this emerging technology. Keywords: Building energy-efficiency; Electrochromic windows; Daylighting; Control switched across their dynamic range and could be fully integrated into a complete daylight, glare

  18. AUTOMATING THE SELECTION OF FENESTRATION SYSTEMS TO BEST MEET DAYLIGHTING PERFORMANCE GOALS

    E-Print Network [OSTI]

    AUTOMATING THE SELECTION OF FENESTRATION SYSTEMS TO BEST MEET DAYLIGHTING PERFORMANCE GOALS Luís closer to producing the desired flux distribution from the outdoor daylight distribution. INTRODUCTION The selection of fenestration systems for daylighting is traditionally done by trial and error. Designers try

  19. ACTIVITY OF HAWAIIAN REEF FISHES DURING THE EVENING AND MORNING TRANSITIONS BETWEEN DAYLIGHT AND DARKNESS

    E-Print Network [OSTI]

    ACTIVITY OF HAWAIIAN REEF FISHES DURING THE EVENING AND MORNING TRANSITIONS BETWEEN DAYLIGHT inactive at night, the latter mainly inactive in daylight. During active periods their behavior, with the diurnal species mostly inactive in darkness and the nocturnal species mostly inactive in daylight (Hobson

  20. Inverse Modeling Using a Wireless Sensor Network (WSN) for Personalized Daylight Harvesting

    E-Print Network [OSTI]

    Agogino, Alice M.

    Inverse Modeling Using a Wireless Sensor Network (WSN) for Personalized Daylight Harvesting Ryan: predictive: daylight harvesting: piecewise linear regression: building energy efficiency Abstract: Smart light levels, discretized by sub-hourly sun angles. Applied on two days of daylight and ten days

  1. SunCast: Fine-grained Prediction of Natural Sunlight Levels for Improved Daylight Harvesting

    E-Print Network [OSTI]

    Whitehouse, Kamin

    SunCast: Fine-grained Prediction of Natural Sunlight Levels for Improved Daylight Harvesting, USA {jklu,whitehouse}@cs.virginia.edu ABSTRACT Daylight harvesting is the use of natural sunlight to reduce the need for artificial lighting in buildings. The key challenge of daylight harvesting

  2. Robustness of circadian clocks to daylight fluctuations: hints from the picoeucaryote

    E-Print Network [OSTI]

    Lefranc, Marc

    1 Robustness of circadian clocks to daylight fluctuations: hints from the picoeucaryote in daylight intensity on the core circadian oscillator, a type of perturbation that has been rarely considered strategy to shield the circadian clock from daylight fluctuations by localizing coupling to the light

  3. Robustness of circadian clocks to daylight fluctuations: hints from the picoeucaryote

    E-Print Network [OSTI]

    1 Robustness of circadian clocks to daylight fluctuations: hints from the picoeucaryote a strategy to minimize the impact of fluctuations in daylight intensity on the core circadian oscillator daylight fluctuations by localizing coupling to the light during specific time intervals. In our model

  4. Using Simple Light Sensors to Achieve Smart Daylight Harvesting Jiakang Lu, Dagnachew Birru, Kamin Whitehouse

    E-Print Network [OSTI]

    Whitehouse, Kamin

    Using Simple Light Sensors to Achieve Smart Daylight Harvesting Jiakang Lu, Dagnachew Birru, Kamin demonstrate how to improve the effectiveness of daylight harvesting with a sin- gle light sensor on each sky to predict the incoming daylight and set window transparency accordingly. We evaluate our system

  5. Empirical assessment of a prismatic daylight-redirecting window film in a full-scale office

    E-Print Network [OSTI]

    LBNL-6496E Empirical assessment of a prismatic daylight- redirecting window film in a full in Leukos, the journal of the IESNA. Empirical assessment of a prismatic daylight- redirecting window film Laboratory, Mailstop 90-3111, 1 Cyclotron Road, Berkeley, CA 94720 USA Abstract Daylight redirecting systems

  6. Time for a Change? It's not just Daylight Savings Time that should be abolished!

    E-Print Network [OSTI]

    1 Time for a Change? It's not just Daylight Savings Time that should be abolished! Sunday, March 11. It is just that the clocks are set differently! By government edict! I advocate not just abolishing Daylight of time zone and/or daylight savings time confusion. Every clock and wristwatch in the world would show

  7. Robustness of Circadian Clocks to Daylight Fluctuations: Hints from the Picoeucaryote Ostreococcus tauri

    E-Print Network [OSTI]

    Lefranc, Marc

    Robustness of Circadian Clocks to Daylight Fluctuations: Hints from the Picoeucaryote Ostreococcus in daylight intensity on the core circadian oscillator, a type of perturbation that has been rarely considered F, Bouget F-Y, et al. (2010) Robustness of Circadian Clocks to Daylight Fluctuations: Hints from

  8. Annual daylighting performance of a passive optical light shelf in sidelit perimeter zones of

    E-Print Network [OSTI]

    Annual daylighting performance of a passive optical light shelf in sidelit perimeter zones Government or any agency thereof or The Regents of the University of California. #12;1 Annual daylighting use in deep perimeter zones of buildings where the windows are subject to high daylight availability

  9. DARKNESS, TWILIGHT, AND DAYLIGHT FORAGING SUCCESS OF BEARS (URSUS AMERICANUS) ON SALMON

    E-Print Network [OSTI]

    Reimchen, Thomas E.

    DARKNESS, TWILIGHT, AND DAYLIGHT FORAGING SUCCESS OF BEARS (URSUS AMERICANUS) ON SALMON IN COASTAL (2000­2002). Bears (maximum 7 simultaneously) were primarily active during daylight near the onset with other bears (4%). Scavenging was greatest during daylight (19%) and lowest during darkness (3%). Bears

  10. Experimental Evaluation of Innovative Wall Daylighting Systems

    E-Print Network [OSTI]

    Place, J. W.; Howard, T. C.; Paulos, S.; Chung, K.

    1988-01-01T23:59:59.000Z

    to deliver most of the light from the projecting mirror to the two inner spaces. One way of doing this without causing glare to the occupants is to project the light on the area of ceiling over the two spaces and allow the ceiling to serve aa a secondary.... Providing illumination in buildings using sunlight as a substitute for electric light is attractive for several reasons: 1. The solar illumination resource is substantial; during most working hours, the solar illumination on a building is several times...

  11. Analysis of Daylighting Requirements within ASHRAE Standard 90.1

    SciTech Connect (OSTI)

    Athalye, Rahul A.; Xie, YuLong; Liu, Bing; Rosenberg, Michael I.

    2013-08-01T23:59:59.000Z

    Pacific Northwest National Laboratory (PNNL), under the Building Energy Codes Program (BECP) funded by U.S. Department of Energy (DOE), provides support to the ASHRAE/IES/IESNA Standard 90.1(Standard 90.1) Standing Standards Project Committee (SSPC 90.1) and its subcommittees. In an effort to provide the ASHRAE SSPC 90.1 with data that will improve the daylighting and fenestration requirements in the Standard, PNNL collaborated with Heschong Mahone Group (HMG), now part of TRC Solutions. Combining EnergyPlus, a whole-building energy simulation software developed by DOE, with Radiance, a highly accurate illumination modeling software (Ward 1994), the daylighting requirements within Standard 90.1 were analyzed in greater detail. The initial scope of the study was to evaluate the impact of the fraction of window area compared to exterior wall area (window-to-wall ratio (WWR)) on energy consumption when daylighting controls are implemented. This scope was expanded to study the impact of fenestration visible transmittance (VT), electric lighting controls and daylighted area on building energy consumption.

  12. Daylight quantum key distribution over 1.6 km

    E-Print Network [OSTI]

    W. T. Buttler; R. J. Hughes; S. K. Lamoreaux; G. L. Morgan; J. E. Nordholt; C. G. Peterson

    2000-01-25T23:59:59.000Z

    Quantum key distribution (QKD) has been demonstrated over a point-to-point $\\sim1.6$-km atmospheric optical path in full daylight. This record transmission distance brings QKD a step closer to surface-to-satellite and other long-distance applications.

  13. List of Daylighting Incentives | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat JumpInc Place:KeystoneSolar (Texas)Biofuels SectorIncentives. CSV (rows

  14. Passive solar technology

    SciTech Connect (OSTI)

    Watson, D

    1981-04-01T23:59:59.000Z

    The present status of passive solar technology is summarized, including passive solar heating, cooling and daylighting. The key roles of the passive solar system designer and of innovation in the building industry are described. After definitions of passive design and a summary of passive design principles are given, performance and costs of passive solar technology are discussed. Passive energy design concepts or methods are then considered in the context of the overall process by which building decisions are made to achieve the integration of new techniques into conventional design. (LEW).

  15. BIM-Centric Daylight Profiler for Simulation (BDP4SIM): A Methodology for Automated Product Model Decomposition and Recomposition for Climate-Based Daylighting Simulation

    E-Print Network [OSTI]

    Benjamin Welle; Zack Rogers; Martin Fischer; Benjamin Welle A; Zack Rogers B; Martin Fischer

    2012-01-01T23:59:59.000Z

    Flexible problem formulation is required for product model-based thermal analysis using multidisciplinary design optimization (MDO) environments for cost-effectiveness, accuracy, and scalability in the Architecture, Engineering, and Construction (AEC) industry. The integration of daylighting simulation into an MDO process, however, presents several implementation challenges. In current practice, the process of an architect, engineer, or daylighting consultant to determine how to analyze a given building design for daylighting performance is frequently subjective, time-consuming, and inconsistent. Furthermore, long simulation time requirements for daylighting significantly hinder the realization of many benefits from MDO. The determination of which spaces in a building are sufficiently different to warrant an independent daylighting analysis is based primarily on building

  16. Solar Design Workbook

    SciTech Connect (OSTI)

    Franta, G.; Baylin, F.; Crowther, R.; Dubin, F.; Grace, A., Griffith, J.W.; Holtz, M.; Kutscher, C.; Nordham, D.; Selkowitz, S.; Villecco, M.

    1981-06-01T23:59:59.000Z

    This Solar Design Workbook presents solar building design applications for commercial buildir^s. The book is divided into four sections. The first section describes the variety of solar applications in buildings including conservation aspects, solar fundamentals, passive systems, active systems, daylighting, and other solar options. Solar system design evaluation techniques including considerations for building energy requirements, passive systems, active systems, and economics are presented in Section II. The third section attempts to assist the designer in the building design process for energy conservation and solar applications including options and considerations for pre-design, design, and post-design phases. The information required for the solar design proee^ has not been fully developed at this time. Therefore, Section III is incomplete, but an overview of the considerations with some of the design proces elements is presented. Section IV illustrates ease studies that utilize solar applications in the building design.

  17. Building Information Modeling (BIM)-Based Daylighting Simulation and Analysis

    E-Print Network [OSTI]

    Kota, S.; Haberl, J.S.; Clayton, M.; Yan, W.

    that the architect and the engineer have to follow to prepare the simulation input files, and the complexity depends on the tools. Currently, Building Information Modeling (BIM) is widely used in the AECO industries and BIM models are used as a means of exchanging... files, graphical user interfaces for defining model geometry were have been created for simulation tools. In addition, geometry modeling tools (CAD tools) were linked with daylighting simulation tools. Currently Building information Model (BIM...

  18. Validation of the Algorithms Developed for Preliminary Prediction of Daylight Distribution in a Toplighted Atrium

    E-Print Network [OSTI]

    Boubekri, M.; Atif, M. R.; Boyer, L. L.

    1988-01-01T23:59:59.000Z

    VALIDATION OF THE ALGORITHMS DEVELOPED FOR PRELIMINARY PREDICTION OF DAYLIGHT DISTRIBUTION IN A TOPLIGHTED ATRIUM MOHAMED BOUBEKRI MORAD R. ATIF LESTER L. BOYER PhD Candidate PhD Student PhD, Professor Texas A&M University Texas MM University... to understand daylight distribution throughout an atrium space is essential to produce good designs. Simp1 ified daylight prediction algorithms for preliminary design of top1 ighted atriums under overcast and clear diffuse skies have been developed as part...

  19. Intelligent Daylight Panel Control System based on Fuzzy Control for Green Buildings

    E-Print Network [OSTI]

    T. C. Kuo; J. S. Lin; Y. Takeuchi; Y. J. Huang

    AbstractThis paper proposes an intelligent daylight panel control system based on fuzzy control theory for green buildings. The goal of this research is to automatically modulate sunlight efficiently and to enhance the quality of interior illuminations, thus reducing the need for artificial lighting and conserving energy. Daylight panels are typically installed on the outside of windows. By applying the proposed fuzzy controller, the reflection angle of daylight panels could be adjusted and optimized so that interior illuminative quality is improved and energy-saving is achieved at the same time. Index Termsdaylight panel, intelligent control, fuzzy control. I.

  20. Daylighting in schools: Improving student performance and health at a price schools can afford: Preprint

    SciTech Connect (OSTI)

    Plympton, P.; Conway, S.; Epstein, K.

    2000-06-14T23:59:59.000Z

    Over the next seven years, at least 5,000 new schools will be designed and constructed to meet the needs of American students in kindergarten through grade 12. National efforts are underway to encourage the use of daylighting, energy efficiency, and renewable energy technologies in school designs, which can significantly enhance the learning environment. Recent rigorous statistical studies, involving 21,000 students in three states, reveal that students perform better in daylit classrooms and indicate the health benefits of daylighting. This paper discusses the evidence regarding daylighting and student performance and development, and presents four case studies of schools that have cost effectively implemented daylighting into their buildings.

  1. Asymmetry of Daily Temperature Records YOSEF ASHKENAZY

    E-Print Network [OSTI]

    Tziperman, Eli

    Asymmetry of Daily Temperature Records YOSEF ASHKENAZY Solar Energy and Environmental Physics, BIDR author address: Yosef Ashkenazy, Department of Solar Energy and Environmental Physics, The J. Blaustein cold fronts are significantly faster and steeper than warm fronts, and to intrusions of cold air

  2. A new approach in data visualization to integrate time and space variability of daylighting in the design process

    E-Print Network [OSTI]

    Yi, Lu, S.M. Massachusetts Institute of Technology

    2008-01-01T23:59:59.000Z

    Daylighting design has great impact on the performance and aesthetical quality of a work of architecture but requires many issues to be addressed during the design process. The way existing daylighting tools deliver data ...

  3. Study of the relationship between indoor daylight environments and patient average length of stay (ALOS) in healthcare facilities

    E-Print Network [OSTI]

    Choi, Joon Ho

    2007-04-25T23:59:59.000Z

    This study investigates how indoor daylight environments affect patient Average Length of Stay (ALOS), by evaluating and analyzing daylight levels in patient rooms in comparison to their ALOS. The patient ALOS data were taken at one general hospital...

  4. Daylight in faade renewal : using new metrics to inform the retrofitting of aging modern-ear faade types

    E-Print Network [OSTI]

    Rice, Edward Oren

    2006-01-01T23:59:59.000Z

    New methods for quantifying daylight are increasingly accessible to designers and planners. While these methods have enabled new building facades to better balance the admission of daylight with the maintenance of thermal ...

  5. Solar skylight

    DOE Patents [OSTI]

    Adamson, James C. (Osprey La., Rumson, NJ 07760)

    1984-01-01T23:59:59.000Z

    A reflective shutter rotates within a skylight housing in such a fashion as to control solar energy thereby providing a combination of heating, lighting, and ventilation. The skylight housing has three faces: a glazed southern face, a glazed northern face, and an open downwardly oriented face to the interior of the structure. Counter-weighted pivot arms support the shutter at either end causing the center of rotation to pass through the center of gravity. The shutter has three basic positions: In the first position, during the winter day, the shutter closes off the northern face, allowing solar energy to enter directly into the supporting structure providing heat gain and daylighting. In the second position, during the winter night, the shutter closes off the open face to the interior, providing insulation between the structure and the skylight housing. In the third position, during the non-heating season, the shutter closes off the southern face blocking unwanted heat gain but allowing diffuse northern light to penetrate for daylighting. In this last position, a means is provided for ventilating by natural convection. The apparatus can be operated either manually or by motor.

  6. Overview Models of the Example Space Renderings using the Architectural Daylighting Tool

    E-Print Network [OSTI]

    Camera B; Joshua Nasman; Barbara Cutler

    Our new TUI for architectural daylighting design allows multiple users to a) gather around a physical sketching environment and select from b) a set of wall primitives and window and material markers to c) build a rough sketch of an architectural design. A d) visualization of a daylighting simulation is projected onto these surfaces.

  7. Towards Embedded Wireless-Networked Intelligent Daylighting Systems for Commercial Buildings

    E-Print Network [OSTI]

    Agogino, Alice M.

    Towards Embedded Wireless-Networked Intelligent Daylighting Systems for Commercial Buildings Yao, daylighting systems are not widely used in the commercial office building. Barriers prohibiting adoption) `Smart Dust motes' wireless platforms is explored. Due to their small size, they can be placed directly

  8. Invited paper for the 2001 IESNA National Conference Daylighting, Dimming, and the Electricity Crisis in California

    E-Print Network [OSTI]

    , and the Electricity Crisis in California Francis Rubinstein, Danielle Neils and Nesrin Colak Ernest Orlando Lawrence Contract No. DE-AC03-76SF00098. #12;Daylighting, Dimming and California Electricity Crisis Rubinstein, Neils & Colak Daylighting, Dimming, and the Electricity Crisis in California Francis Rubinstein

  9. Walking on daylight : the application of translucent floor systems as a means of achieving natural daylighting in mid and low rise architecture

    E-Print Network [OSTI]

    Widder, James

    1985-01-01T23:59:59.000Z

    This thesis is concerned with the introduction of quality daylight to buildings by means of translucency in the horizontal planes or floors within the building. Since people began to build, the concept of translucency in ...

  10. Daylighting Requirements in the National Building Energy Codes Theyre Here!

    SciTech Connect (OSTI)

    Richman, Eric E.

    2008-06-30T23:59:59.000Z

    Requirements for the control of electric lighting in daylighted areas have historically been avoided in the national building energy codes. This is potentially a rich source of energy savings but as most lighting designers and architects know, daylighting design is not simple! The sheer complication of daylighting design makes crafting daylighting control requirements that could be applied generically in a national energy code a difficult task. However, that is currently changing. The Department of Energys (DOE) Building Energy Codes Program (BECP) managed by Pacific Northwest National Laboratory (PNNL) has been supporting the ANSI/ASHRAE/IESNA 90.1 committee in developing improvements to the 90.1 Standard. With subcontract support, the 90.1 Lighting Subcommittee has championed the incorporation of daylighting design and control requirements for the upcoming 2010 version of the nationally available ANSI/ASHRAE/IESNA Standard 90.1 for commercial building energy use.

  11. Color and spectral analysis of daylight in southern Javier Hernandez-Andres, Javier Romero, and Juan L. Nieves

    E-Print Network [OSTI]

    Lee Jr., Raymond L.

    Color and spectral analysis of daylight in southern Europe Javier Herna´ndez-Andre´s, Javier Romero We have analyzed the colorimetric and spectral characteristics of 2600 daylight spectra (global), luminous efficacies, and relative UV and IR contents of Granada daylight. The chromaticity coordinates

  12. Dynamic daylight control system implementing thin cast arrays of polydimethylsiloxane-based millimeter-scale transparent louvers

    E-Print Network [OSTI]

    Aizenberg, Joanna

    Dynamic daylight control system implementing thin cast arrays of polydimethylsiloxane: Daylight control system Dynamic window system Energy-efficiency Transparent louvers a b s t r a c in standard office buildings. The development of daylight control systems that maximize the penetration

  13. CALCULATING INTERIOR DAYLIGHT ILLUMINATION WITH A PROGRAMMABLE HAND CALCULATOR

    E-Print Network [OSTI]

    Bryan, Harvey J.

    2013-01-01T23:59:59.000Z

    of Energy~ Office of Conservation and Solar Energy~ "EnergyConservation and Solar Applications of the U. S. Department of Energy

  14. Passive Solar Commercial Demonstration Program: Phase I. Final report

    SciTech Connect (OSTI)

    none,

    1981-02-10T23:59:59.000Z

    The passive solar retrofit of a small existing commercial/residential building is described. An add on gallery/sunspace is integrated into the existing structure both in terms of energy and architectural functioning. The sunspace solution maximizes the amount of south facing glass for solar heat gain, while still allowing a deep penetration of daylight into the existing buildings. (MHR)

  15. Re: Affordable Textbooks, Fall Semester Update In a message dated 10/28/2010 10:28:50 A.M. Eastern Daylight Time, nicole@studentpirgs.org

    E-Print Network [OSTI]

    Garfunkel, Eric

    .M. Eastern Daylight Time, nicole@studentpirgs.org writes: Hi everyone, There have been some exciting

  16. THE PASSIVE SOLAR DESIGN PROCESS FOR A SMALL OFFICE/LABORATORY BUILDING

    E-Print Network [OSTI]

    Andersson, Brandt

    2011-01-01T23:59:59.000Z

    PASSIVE SOLAR DESIGN PROCESS FOR A SMALL OFFICE/LABORATORY BUILDINGpassive solar buildings will be built in the corning years. Thei r designdesign; and (3) development of building energy analysis programs which can evalu- ate the thermal and daylighting performance of passive solar

  17. A CRITICAL REVIEW OF SIMULATION TECHNIQUES FOR DAYLIGHT RESPONSIVE SYSTEMS

    E-Print Network [OSTI]

    L. Doulos; A. Tsangrassoulis; F. Topalis

    * corresponding author Application of lighting control technologies has increased the public interest. Although these technologies have been promoted during the last years their successful use in buildings has been accomplished in a small percentage of new projects. One reason is the difficulty in quantifying the energy savings and thus the subsequent payback period. The majority of existing simulation tools (which are embedded in building energy codes) needed during initial design- are based on the estimation of the potential energy savings due to daylight. The paper focus on the limitations of current simulation approaches comparing their results, in order to assess their accuracy. For this, special test cases have been developed exploiting their domain of validity.

  18. Soiling losses for solar photovoltaic systems in California

    E-Print Network [OSTI]

    Mejia, Felipe A; Kleissl, Jan

    2013-01-01T23:59:59.000Z

    additional solar energy could be harvested through panelsolar energy modeled from SAW ( ), the daily (relative) DC solar conversion efficiency ( ) for the solar panels

  19. Experience of light : the use of an inverse method and a genetic algorithm in daylight design

    E-Print Network [OSTI]

    Chutarat, Acharawan

    2001-01-01T23:59:59.000Z

    Integration of daylight availability in time and architectural space is a critical element in achieving optimal comfort and productivity, as well as in minimizing energy consumption. In recent years, there has been an ...

  20. Time-varied daylighting performance to enable a goal-driven design process

    E-Print Network [OSTI]

    Kleindienst, Sin A. (Sin Alexandra)

    2010-01-01T23:59:59.000Z

    Due to the overwhelming number of decisions to be made during early stage design, there is a need for intuitive methods to communicate data so that it is quickly and easily understood by the designer. In daylighting analysis, ...

  1. A system for optimizing interior daylight distribution using reflective Venetian blinds with independent blind angle control

    E-Print Network [OSTI]

    McGuire, Molly E

    2005-01-01T23:59:59.000Z

    An operational algorithm for blind angle control is developed to optimize the daylighting performance of a system of reflective Venetian blinds. Numerical modeling and experiment confirm that independent control of alternating ...

  2. Form and daylight as a creative medium : Church of John Paul II in South End, Boston

    E-Print Network [OSTI]

    Gruzewski, Jaroslaw

    1992-01-01T23:59:59.000Z

    This thesis is an architectural design project of a Catholic Church dedicated to Pope John Paul II. The main intention of this Thesis is to explore and clearly present daylighting methods and techniques and how important ...

  3. Daylighting techniques used in indigenous buildings in the United Arab Emirates (UAE), an investigative approach

    E-Print Network [OSTI]

    Alnuaimi, Maitha Mohammed

    2009-06-02T23:59:59.000Z

    This study investigated the potential of the daylighting systems used in the indigenous architecture of the United Arab Emirates (UAE), located in Dubai (latitude 25 N longitude 55 E). The analysis tested the lighting performance of three...

  4. Daylighting Design Tools in Atria for Minimum Cooling Loads in Atrium Buildings

    E-Print Network [OSTI]

    Atif, M. R.; Boyer, L. L.; Degelman, L. O.; Claridge, D. E.

    The daylighting and sunlighting value of an atrium are considered the main reasons for including the atrium use in the built environment. However, most atria today are either overlit, which causes tremendous cooling loads, or underlit, requiring...

  5. Daylight Analysis with Microcomputers for School Buildings in a Hot, Humid Climate

    E-Print Network [OSTI]

    Leaver, J.; McQueen, T.

    1987-01-01T23:59:59.000Z

    Daylighting and other passive energy technologies are critical issues that should be considered in the early stages of building planning and architectural design. Both new design and retrofit of existing buildings benefit greatly by use...

  6. An Empirical Study and Analysis of Daylight Penetration Through a Light Plenum

    E-Print Network [OSTI]

    Hill, G. E.; Rowland, D.; Carlson, K.; Karpack, L.

    1985-01-01T23:59:59.000Z

    Lighting accounts for approximately 54% of the annual energy consumption of office buildings, and can effectively be reduced through daylighting. The simplest way to provide day lighting into a typical office space has been to use unilateral...

  7. Economic and design analysis of daylighting a commercial tower in a hot and humid climate

    E-Print Network [OSTI]

    Roscow, Robert F

    1981-01-01T23:59:59.000Z

    A forty story commercial office tower in Tampa, Florida was redesigned for daylighting. The methods are outlined and results illustrated, A cooling load comparison is done to determine the economic feasibility of such a ...

  8. Energy, Shading and Daylighting Analysis for the Austin Bergstrom International Airport Terminal

    E-Print Network [OSTI]

    Holder, L. M. III; Holder, L. M. IV

    2002-01-01T23:59:59.000Z

    Our firm was under contract with the City of Austin, Texas to perform energy analysis and analysis of the daylighting potential within the New Austin Bergstrom International Airport Terminal. Design of the Passenger Terminal Facility for the New...

  9. How Do You Use Daylighting While Reducing Excess Heat from Windows...

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

    through these windows in the summer. How do you use daylighting while reducing excess heat from windows? Each Thursday, you have the chance to share your thoughts on a question...

  10. Cooling Energy and Cost Savings with Daylighting in a Hot and Humid Climate

    E-Print Network [OSTI]

    Arasteh, D.; Johnson, R.; Selkowitz, S.; Connell, D.

    1985-01-01T23:59:59.000Z

    Fenestration performance in nonresidential buildings in hot climates is often a large cooling load liability. Proper fenestration design and the use of daylight-responsive dimming controls on electric lights can, in addition to drastically reducing...

  11. DAILY PROGRAMME Day Time Daily Plan

    E-Print Network [OSTI]

    de Villiers, Marienne

    to draw a bird 16:45h - 17:10h Hanneline Smit - Birds and Solar Energy in South Africa 17:10h - 17:35h

  12. An Analysis of Energy Reductions from the Use of Daylighting in Low-Cost Housing

    E-Print Network [OSTI]

    Rungchareonrat, N.

    AN ANALYSIS OF ENERGY REDUCTIONS FROM THE USE OF DAYLIGHTING IN LOW-COST HOUSING A Thesis by NAYARAT RUNGCHAREONRAT Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 2003 Major Subject: Architecture AN ANALYSIS OF ENERGY REDUCTIONS FROM THE USE OF DAYLIGHTING IN LOW-COST HOUSING A Thesis by NAYARAT RUNGCHAREONRAT...

  13. CLIMATE-BASED DAYLIGHT PERFORMANCE: BALANCING VISUAL AND NON-VISUAL ASPECTS OF LIGHT INPUT

    E-Print Network [OSTI]

    M. Andersen; J. Mardaljevic; Nicolas Roy; Jens Christoffersen

    This study uses a domestic dwelling as the setting to investigate and explore the applicability of daylighting metrics for residential buildings, including the formulation of metrics for nonvisual effects. The simulation approach used to generate the performance data from which the metrics are derived is called climate-based daylight modelling (CBDM). This approach delivers predictions of various luminous quantities using sun and sky conditions that are derived from standardised annual meteorological datasets. Although there are uncertainties regarding the precise calibration, there is now sufficient empirical data to parameterise models that also simulate the non-visual aspects of daylight, e.g. for circadian entrainment and a general sense of ?alertness?. For these non-visual aspects, vertical illuminance at the eye was predicted using a modified climate-based daylight modelling approach. In the paper, we consider what relation there might be between the three aspects of daylight provision and if these relations appear to be complementary or conflicting in nature: for task; to reduce electric lighting usage; and, for non-visual effects. The implications for future building guidelines for daylighting are also discussed.

  14. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01T23:59:59.000Z

    of the electrical power output to the solar power input), aSolar Energy Calculator using Google Maps 23 Table 1.24: PV System Power Production Average Daily Irradiance (kWh/m2) Instillation Efficiency Labeled Efficiency Output

  15. CITI Program Website Downtime for Software Upgrade Starting Monday 29 July at 11 a.m. U.S. Eastern Daylight Time, the CITI Program website will be

    E-Print Network [OSTI]

    .S. Eastern Daylight Time, the CITI Program website will be unavailable for approximately two to three days

  16. Origins of Analysis Methods Used to Design High Performance Commercial Buildings: Part II, Solar Energy Analysis

    E-Print Network [OSTI]

    Oh, S.; Haberl, J.S.

    PV, solar thermal, passive solar analysis programs are reivewed using a new comprehensive genealogy chart. In companion papers, the origins of the analysis methods of whole-building energy and daylighting simulation programs are reviewed (Oh... analysis programs evaluate the performance of solar systems that are designed to collect and use solar radiation for thermal or electricity conversion. These programs are used for simulations and design methods: Computer simulations estimate the time...

  17. BUILDING RESEARCH & INFORMATION (2008) Paper in press (mock proof) expected to appear in Vol 36 No 6 (Nov 2008) An intuitive daylighting performance

    E-Print Network [OSTI]

    Varela, Carlos

    No 6 (Nov 2008) An intuitive daylighting performance analysis and optimization approach M. Andersen1 of daylighting considerations into the design process requires many issues to be addressed simultaneously quantitative and qualitative performance criteria using daylighting analysis data in various forms

  18. CLTC is a not-for-profit research, development and demonstration facility leading innovations in energy-efficient lighting and daylighting technologies.

    E-Print Network [OSTI]

    California at Davis, University of

    in energy-efficient lighting and daylighting technologies. Collaborating with partners in government common ways CLTC utilizes funding to advance the science of energy-efficient lighting and daylighting and field test emerging lighting and daylighting technologies. Demonstrations help vet the performance

  19. Evaluation of the Daylight Cycle of Model-Predicted Cloud Amount and Condensed Water Path over Europe with Observations from MSG SEVIRI

    E-Print Network [OSTI]

    Stoffelen, Ad

    Evaluation of the Daylight Cycle of Model-Predicted Cloud Amount and Condensed Water Path over accurate information on diurnal cycles during daylight hours of cloud properties over land and ocean surfaces. This paper evaluates the daylight cycle of CA and CWP as predicted by the Regional Atmospheric

  20. Impact of Fixed Exterior Shading on Daylighting: A Case Study of the David Brower Center

    E-Print Network [OSTI]

    Zelenay, Krystyna

    2011-01-01T23:59:59.000Z

    blind systems were always lowered and seasonally adjusted (continued on next page) MS Thesis,Thesis, Dept. of Architecture, UC Berkeley 2011 http://escholarship.org/uc/item/1mq5k9mw blinds,blinds frequently enough to take advantage of daylighting. 14 While MS Thesis,

  1. Forecasting of Solar Radiation Detlev Heinemann, Elke Lorenz, Marco Girodo

    E-Print Network [OSTI]

    Heinemann, Detlev

    Forecasting of Solar Radiation Detlev Heinemann, Elke Lorenz, Marco Girodo Oldenburg University have been presented more than twenty years ago (Jensenius, 1981), when daily solar radiation forecasts

  2. ARM - Daily Report Archive

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformationbudapest Comments? We would love toContact Information Related LinksDaily Report Archive

  3. 01.07.2013, 2013_EnviroInfo_wald_hc1_short.doc HelioClim-1: 21-years of daily values in solar radiation in one-click

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    manuscript, published in "27th International Conference on Informatics for Environmental Protection, Hambourg as the main use of these data relates to investment decision in solar plants and selection of appropriate

  4. Physical Building Information Modeling for Solar Building Design and Simulation- Annual Report 2011

    E-Print Network [OSTI]

    Yan, W.; Haberl, J.; Clayton, M.; Jeong, W.; Kim, J.; Kota, S.; Alcocer, J.; Dixit, M.

    2011-01-01T23:59:59.000Z

    information from BIM to Radiance. For Building Integrated Photovoltaic (BIPV), we have researched on how to build solar models in BIM that can calculate solar position and solar insolation. 1.2 Research on BIM simplification methods, BIM topology, and data... we will continue investigating the use of Modelica to integrate the daylighting modeling with thermal modeling. 4 c) BIPV prototypes We have developed a Building Integrated Photovoltaic (BIPV) prototype in the BIM (Autodesk Revit) platform...

  5. Acceleration of the matrix multiplication of Radiance three phase daylighting simulations with parallel computing on heterogeneous hardware of personal computer

    SciTech Connect (OSTI)

    University of Miami; Zuo, Wangda; McNeil, Andrew; Wetter, Michael; Lee, Eleanor S.

    2013-04-30T23:59:59.000Z

    Building designers are increasingly relying on complex fenestration systems to reduce energy consumed for lighting and HVAC in low energy buildings. Radiance, a lighting simulation program, has been used to conduct daylighting simulations for complex fenestration systems. Depending on the configurations, the simulation can take hours or even days using a personal computer. This paper describes how to accelerate the matrix multiplication portion of a Radiance three-phase daylight simulation by conducting parallel computing on heterogeneous hardware of a personal computer. The algorithm was optimized and the computational part was implemented in parallel using OpenCL. The speed of new approach was evaluated using various daylighting simulation cases on a multicore central processing unit and a graphics processing unit. Based on the measurements and analysis of the time usage for the Radiance daylighting simulation, further speedups can be achieved by using fast I/O devices and storing the data in a binary format.

  6. Space, light, and time : prospective analysis of Circadian illumination for health-based daylighting with applications to healthcare architecture

    E-Print Network [OSTI]

    Pechacek, Christopher S. (Christopher Scott)

    2008-01-01T23:59:59.000Z

    Light in architecture can be studied for its objective or perceptual effects. This thesis describes an objective link between human health and architectural design. Specifically, the link between daylight and human circadian ...

  7. Solar and daylight availability evaluation and estimation in urban fabric under specific sky conditions

    E-Print Network [OSTI]

    Zemmouri,N.

    2014-01-01T23:59:59.000Z

    with changing materials of construction Used water Energy consumpted Odor Production of photochimic ozone Human toxicity Aquatic ecotoxicity Euthrophisation GWP Inert wastes product Radioactif wastes Submission of abiotic ressources Acidification Impacts... of BET-TImpacts of BET . Used water Energy consumpted Odor Production of photochimic ozone Human toxicity Aquatic ecotoxicity Euthrophisation GWP Inert wastes product Radioactif wastes Submission of abiotic ressources Acidification Impacts of BBC ESL...

  8. High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists'Montana.ProgramJulietip sheetK-4In 2013 many| Department HIGH PERFORMANCETheEngines

  9. Impact of consumer/client issues on passive solar design

    SciTech Connect (OSTI)

    Balcomb, S.A.

    1981-01-01T23:59:59.000Z

    The ultimate test of any passive solar building's performance is user satisfaction. Some of the issues which affect the user's perception of passive solar are discussed. Results of questionnaire and interview surveys of both teachers and students in two Santa Fe passive solar schools are presented. Particular attention is given to perceptions of daylighting, and to both visual and thermal comfort. The importance of factoring results of post-occupancy surveys into the design of the next generation of passive solar buildings is emphasized.

  10. Practical free-space quantum key distribution over 10 km in daylight and at night

    E-Print Network [OSTI]

    Richard J. Hughes; Jane E. Nordholt; Derek Derkacs; Charles G. Peterson

    2002-06-14T23:59:59.000Z

    We have demonstrated quantum key distribution (QKD) over a 10-km, 1-airmass atmospheric range during daylight and at night. Secret random bit sequences of the quality required for the cryptographic keys used to initialize secure communications devices were transferred at practical rates with realistic security. By identifying the physical parameters that determine the system's secrecy efficiency, we infer that free-space QKD will be practical over much longer ranges under these and other atmospheric and instrumental conditions.

  11. ADAPTIVE FULL-SPECTRUM SOLAR ENERGY SYSTEMS Cross-Cutting R & D on adaptive full-spectrum solar energy systems for more efficient and affordable use of solar energy in buildings and hybrid photobioreactors

    SciTech Connect (OSTI)

    Byard D. Wood; David L. Beshears

    2006-02-01T23:59:59.000Z

    This RD&D project is a three year team effort to develop a hybrid solar lighting (HSL) system that transports daylight from a paraboloidal dish concentrator to a luminaire via a bundle of polymer fiber optics. The luminaire can be a device to distribute sunlight into a space for the production of algae or it can be a device that is a combination of daylighting and electric lighting for space/task lighting. In this project, the sunlight is collected using a one-meter paraboloidal concentrator dish with two-axis tracking. For the third generation (beta) system, the secondary mirror is an ellipsoidal mirror that directs the visible light into a bundle of 3 mm diameter fibers. The IR spectrum is filtered out to minimize unnecessary heating at the fiber entrance region. This report describes the following investigations: Niche applications for HSL technology, Luminaire design characteristics for linear and point lighting fixtures, and Daylight affects on productivity.

  12. Alaska District, lab partner on cold regions work Subzero temperatures and limited daylight shorten the work season in northern regions. Add

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Alaska District, lab partner on cold regions work Subzero temperatures and limited daylight shorten and innovative solutions in engineering, construction and operations in cold regions. The partnership between

  13. Backstage at the Daily Show

    Broader source: Energy.gov [DOE]

    Backstage footage from Secretary Chu's appearance on the Daily Show where he discuses the green room candy dish and possible lighting considerations.

  14. QUEENSLAND UNIVERSITY OF TECHNOLOGY CENTRE FOR MEDICAL, HEALTH AND ENVIRONMENTAL PHYSICS SCHOOL OF PHYSICAL AND CHEMICAL SCIENCES MODIFICATION OF ATRIUM DESIGN TO IMPROVE THERMAL AND DAYLIGHTING PERFORMANCE

    E-Print Network [OSTI]

    Ashley Mabb; Centre For Medical; Environmental Physics

    The inclusion of a central court or atrium within a building is a popular design due to its aesthetic, open appearance. The greater penetration of natural light aids in the reduction in use of artificial lighting during the day. Care must be taken to balance the solar heat gain against the daylight penetration. This balance is critical for the reduction of the electrical energy load of the building, whilst maintaining a high level of comfort for the occupants. In the tropics modifications to atrium building designs are necessary to diminish high elevation direct solar heat gain. Traditionally, shading the window apertures or lowering the transmission through the glazing was used. These solutions limit the view and reduce the light level. The use of angular selective glazing upon atria allows the rejection of high elevation direct sunlight whilst redirecting and therefore improving low elevation skylight penetration. Tilted angular selective glazing used upon adjoining spaces to atria help vertical light in the atrium well to be redirected horizontally deep into the space. These effects reduce overheating which would normally restrict the use of atria in warmer environments as well as improve illumination penetration into adjoining spaces.

  15. Simulating the Daylight Performance of Complex Fenestration Systems Using Bidirectional Scattering Distribution Functions within Radiance

    SciTech Connect (OSTI)

    Ward, Gregory; Mistrick, Ph.D., Richard; Lee, Eleanor; McNeil, Andrew; Jonsson, Ph.D., Jacob

    2011-01-21T23:59:59.000Z

    We describe two methods which rely on bidirectional scattering distribution functions (BSDFs) to model the daylighting performance of complex fenestration systems (CFS), enabling greater flexibility and accuracy in evaluating arbitrary assemblies of glazing, shading, and other optically-complex coplanar window systems. Two tools within Radiance enable a) efficient annual performance evaluations of CFS, and b) accurate renderings of CFS despite the loss of spatial resolution associated with low-resolution BSDF datasets for inhomogeneous systems. Validation, accuracy, and limitations of the methods are discussed.

  16. Key word:Daylight Factor Window Wall Ratio Pendentive dome Lighting design Tropical region Architecture and Interior design

    E-Print Network [OSTI]

    Mehrdad Mazloomi

    Abstract: Daylighting design plays important role in architecture of religious buildings such as churches and mosques where pendentive dome construction is frequently used. In daylighting design, many designers face difficulty in estimating the interior share of light which is usually expressed by daylight factor due to complexity of interior form. This study aims to provide designers with a rather high precision rule of thumb for average daylight factor in pendentive dome building. Thus, it investigates the Daylight Factor [DF] distribution of such buildings with reference to the tropics. It takes the Window Wall Ratio [WWR] into account and seeks its influence on daylight factor. By a 12 X 12 points grid, it examines five different ratios including 0.1, 0.2, 0.3, 0.4 and 0.5 on DF of the floor beneath the dome. The results endorse the direct relation of WWR and DF. The least WWR equal to 0.1 yields an average DF of 0.55 % while the greatest WWR of 0.5 yields in average DF of 2.56%. The intermediate WWR in steps of 0.2, 0.3 and 0.4 correspond to 1.04, 1.56 and 2.07 percent respectively. As a relatively precise rule of thumb, any increment in consequent steps of WWR with 0.1 intervals results in 0.5 % increase in DF. This can be employed by architects and interior designers for lighting design of pendentive dome buildings in tropical region.

  17. Empirical assessment of a prismatic daylight-redirecting window film in a full-scale office testbed

    SciTech Connect (OSTI)

    Thanachareonkit, Anothai; Lee, Eleanor S.; McNeil, Andrew

    2013-08-31T23:59:59.000Z

    Daylight redirecting systems with vertical windows have the potential to offset lighting energy use in deep perimeter zones. Microstructured prismatic window films can be manufactured using low-cost, roll-to-roll fabrication methods and adhered to the inside surface of existing windows as a retrofit measure or installed as a replacement insulating glass unit in the clerestory portion of the window wall. A clear film patterned with linear, 50-250 micrometer high, four-sided asymmetrical prisms was fabricated and installed in the south-facing, clerestory low-e, clear glazed windows of a full-scale testbed facility. Views through the film were distorted. The film was evaluated in a sunny climate over a two-year period to gauge daylighting and visual comfort performance. The daylighting aperture was small (window-towall ratio of 0.18) and the lower windows were blocked off to isolate the evaluation to the window film. Workplane illuminance measurements were made in the 4.6 m (15 ft) deep room furnished as a private office. Analysis of discomfort glare was conducted using high dynamic range imaging coupled with the evalglare software tool, which computes the daylight glare probability and other metrics used to evaluate visual discomfort. The window film was found to result in perceptible levels of discomfort glare on clear sunny days from the most conservative view point in the rear of the room looking toward the window. Daylight illuminance levels at the rear of the room were significantly increased above the reference window condition, which was defined as the same glazed clerestory window but with an interior Venetian blind (slat angle set to the cut-off angle), for the equinox to winter solstice period on clear sunny days. For partly cloudy and overcast sky conditions, daylight levels were improved slightly. To reduce glare, the daylighting film was coupled with a diffusing film in an insulating glazing unit. The diffusing film retained the directionality of the redirected light spreading it within a small range of outgoing angles. This solution was found to reduce glare to imperceptible levels while retaining for the most part the illuminance levels achieved solely by the daylighting film.

  18. Unravelling daily human mobility motifs

    E-Print Network [OSTI]

    Schneider, Christian M.

    Human mobility is differentiated by time scales. While the mechanism for long time scales has been studied, the underlying mechanism on the daily scale is still unrevealed. Here, we uncover the mechanism responsible for ...

  19. An experimental setup to evaluate the daylighting performance of an advanced optical light pipe for deep-plan office buildings

    E-Print Network [OSTI]

    Martins Mogo de Nadal, Betina Gisela

    2005-11-01T23:59:59.000Z

    This research focuses on an advanced optical light pipe daylighting system as a means to deliver natural light at the back of deep-plan office buildings (15ft to 30ft), using optimized geometry and high reflective materials. The light pipe...

  20. 2003: Energy performance of daylight-linked automatic lighting control systems in large atrium spaces: report on two field-monitored case studies

    E-Print Network [OSTI]

    M. R. Galasiu; Morad R. Atif; Anca D. Galasiu

    This paper presents the field-measured energy performance of two common types of daylight-linked lighting control systems, continuous dimming and automatic on/off installed in two existing large atrium spaces located in Canada. The daylighting performance was evaluated based on the daylight contribution to the indoor illuminance and the amount of electrical lighting displaced by daylighting via the daylight-linked lighting control systems. Measured daylighting contribution to the space indicates that significant lighting energy savings can be achieved in atrium spaces if the daylight-linked lighting control system is appropriately selected, installed and commissioned throughout its existence. Results extrapolated from measurements collected during summer and winter indicate that as installed, the continuous dimming lighting control system provides 46% annual savings in electrical lighting consumption, while the automatic on/off saves between 11-17% in lighting energy. These savings account for 68% of the lighting energy consumed during main occupancy for the continuous dimming system, and 31.5% for the automatic on/off. Operation irregularities such as a reduced dimming linearity and an incorrect adjustment of the phases of the dimming control system, as well as the inadequate location of the photocell controlling the automatic on/off lighting system, the improper maintenance of the skylight during winter and the oversizing of the lighting system reduced the energy efficiency of the lighting control systems by 30-65%.

  1. Experimental analysis on a 1:2 scale model of the double light pipe, an innovative technological device for daylight transmission

    SciTech Connect (OSTI)

    Baroncini, C.; Boccia, O.; Chella, F.; Zazzini, P. [D.S.S.A.R.R. Faculty of Architecture, University ''G. D'Annunzio'' Viale Pindaro 42, 65127 Pescara (Italy)

    2010-02-15T23:59:59.000Z

    In this paper the authors present the double light pipe, an innovative technological device, designed as an evolution of a traditional light pipe, which distributes daylight to underground areas of a building, illuminating, at the same time, the passage areas thanks to a larger collector and a second transparent pipe attached to the first one. Unlike the traditional light pipe, thanks to this double illuminating function it can be located in the middle of a room, despite its encumbrance. In this paper the technological design of the double light pipe is presented and the results of an experimental analysis on a reduced scale (1:2) model are shown. Internal illuminance data over horizontal and vertical work-planes were measured in various sky conditions with or without direct solar radiation. Being this innovative device obtained by a light pipe integrated with a second pipe, it performs like a traditional light pipe for the final room and, at the same time, illuminates the intermediate room giving it uniform and high quality light, particularly indicated for wide plant areas, such as show-rooms or museums. (author)

  2. The use of daylight in the design of a controlled environment for food production in the Caribbean and other equatorial climates

    E-Print Network [OSTI]

    Charles, Curtis B

    1989-01-01T23:59:59.000Z

    This thesis addresses the use of daylight in the design of a controlled environment for food production in the Caribbean and other Equatorial climates. An expanding population has put a tremendous burden on the food ...

  3. Soiling losses for solar photovoltaic systems in California

    E-Print Network [OSTI]

    Mejia, Felipe A; Kleissl, Jan

    2013-01-01T23:59:59.000Z

    n efficiency and daily rainfall for a 554 kW dc PV plant inPV sites demonstrated how soiling decreases the efficiency of solar PV plants.

  4. Impact of Fixed Exterior Shading on Daylighting: A Case Study of the David Brower Center

    E-Print Network [OSTI]

    Zelenay, Krystyna

    2011-01-01T23:59:59.000Z

    passive design strategies, including proper building massing and solarbuilding massing and solar orientation, a number of other passive design

  5. Impact of Fixed Exterior Shading on Daylighting: A Case Study of the David Brower Center

    E-Print Network [OSTI]

    Zelenay, Krystyna

    2011-01-01T23:59:59.000Z

    passive design strategies, including proper building massing and solarand solar orientation, a number of other passive design

  6. Energy Use Intensity and its Influence on the Integrated Daylighting Design of a Large Net Zero Energy Building: Preprint

    SciTech Connect (OSTI)

    Guglielmetti , R.; Scheib, J.; Pless, S. D.; Torcellini , P.; Petro, R.

    2011-03-01T23:59:59.000Z

    Net-zero energy buildings generate as much energy as they consume and are significant in the sustainable future of building design and construction. The role of daylighting (and its simulation) in the design process becomes critical. In this paper we present the process the National Renewable Energy Laboratory embarked on in the procurement, design, and construction of its newest building, the Research Support Facility (RSF) - particularly the roles of daylighting, electric lighting, and simulation. With a rapid construction schedule, the procurement, design, and construction had to be tightly integrated; with low energy use. We outline the process and measures required to manage a building design that could expect to operate at an efficiency previously unheard of for a building of this type, size, and density. Rigorous simulation of the daylighting and the electric lighting control response was a given, but the oft-ignored disconnect between lighting simulation and whole-building energy use simulation had to be addressed. The RSF project will be thoroughly evaluated for its performance for one year; preliminary data from the postoccupancy monitoring efforts will also be presented with an eye toward the current efficacy of building energy and lighting simulation.

  7. Developing hourly weather data for locations having only daily weather data

    SciTech Connect (OSTI)

    Talbert, S.G.; Herold, K.E.; Jakob, F.E.; Lundstrom, D.K.

    1983-06-01T23:59:59.000Z

    A methodology was developed to modify an hourly TMY weather tape to be representative of a location for which only average daily weather parameters were avilable. Typical hourly and daily variations in solar flux, and other parameters, were needed to properly exercise a computer model to predict the transient performance of a solar controlled greenhouse being designed for Riyadh, Saudi Arabia. The starting point was a TMY tape for Yuma, Arizona, since the design temperatures for summer and winter are nearly identical for Yuma and Riyadh. After comparing six of the most important weather variables, the hourly values on the Yuma tape were individually adjusted to give the same overall daily average conditions as existed in the long-term Riyadh data. Finally, a statistical analysis was used to confirm quantitatively that the daily variations between the long term average values for Riyadh and the modified TMY weather tape for Yuma matched satisfactorily.

  8. Through a window, brightly : modulating daylight and solar radiation in commercial and institutional buildings through the use of architectural elements

    E-Print Network [OSTI]

    Schlereth, Hans-Joachim

    1982-01-01T23:59:59.000Z

    Natural lighting serves several important functions in buildings. The visual power of a shaft of sunlight penetrating a dark space or the visual beauty of a stained window has long been recognized by architects and designers. ...

  9. Adaptive Full-Spectrum Solar Energy Systems Cross-Cutting R&D on adaptive full-spectrum solar energy systems for more efficient and affordable use of solar energy in buildings and hybrid photobioreactors

    SciTech Connect (OSTI)

    Wood, Byard; Kim, Kwang

    2006-03-30T23:59:59.000Z

    This RD&D project is a multi-institutional effort to develop a hybrid solar lighting (HSL) system that transports daylight from a paraboloidal dish concentrator to a luminaire via a bundle of polymer fiber optics. The luminaire can be a device to distribute sunlight into a space for the production of algae for CO{sub 2} sequestration or it can be a device that is a combination of daylighting and electric lighting for space/task lighting. In this project, the sunlight is collected using a one-meter paraboloidal concentrator dish with two-axis tracking. For the third generation (beta) system, the secondary mirror is an ellipsoidal mirror that directs the visible light into a bundle of 3 mm diameter fibers. The IR spectrum is filtered out to minimize unnecessary heating at the fiber entrance region. This report describes the major achievements from this research that began in August 2001.

  10. Polar axis solar collector

    SciTech Connect (OSTI)

    Ludlow, G.T.

    1994-01-04T23:59:59.000Z

    A polar column solar collector is described for use in association with a building, the system having a concave mirror located on the exterior of the building and defining a focal point and a central axis, a mounting column secured to the mirror coaxial therewith, a polar axis column, a hinge swingably connecting the mounting column to the polar axis column for moving the concave mirror to aim it directly at the sun at least over a predetermined period of the daylight hours, a secondary reflector located at the focal point of the concave mirror to receive the sun's rays reflected from the concave mirror, an opening in the concave mirror to receive a concentrated beam of the sun's rays reflected from the secondary reflector and to direct the beam along the mounting column, a third reflector movably located at the junction of the mounting column and the polar axis column to receive the concentrated beam of the sun's rays from the secondary reflector reflected through the opening, and to redirect it along the polar axis column, and a polar column rotator for rotating at least a portion of the polar column to track the movement of the sun. 7 figs.

  11. Energy Assurance Daily (EAD): July 2012

    Broader source: Energy.gov [DOE]

    Energy Assurance Daily provides a summary of public information concerning current energy issues. Published Monday through Friday to inform stakeholders of developments affecting energy systems,...

  12. Energy Assurance Daily (EAD): April 2012

    Broader source: Energy.gov [DOE]

    Energy Assurance Daily provides a summary of public information concerning current energy issues. Published Monday through Friday to inform stakeholders of developments affecting energy systems,...

  13. Energy Assurance Daily (EAD): June 2012

    Broader source: Energy.gov [DOE]

    Energy Assurance Daily provides a summary of public information concerning current energy issues. Published Monday through Friday to inform stakeholders of developments affecting energy systems,...

  14. Comparative Study of summer, Winter and Quinox Sky Type of India Using Daylight Coefficient Method and Cie Standard General Sky Model

    E-Print Network [OSTI]

    Sutapa Mukherjee M. Tech

    Abstract:- Energy efficiency provided by daylight requires an accurate estimation of the amount of daylight entering a building. The actual daylight illuminance of a room is mainly influenced by the luminance levels and patterns of the sky in the direction of view of the window at that time. The daylight coefficient concept, which considers the changes in the luminance of the sky elements, offers a more effective way of computing indoor daylight illuminances. Recently, Kittler et al. have proposed a new range of 15 standard sky luminance distributions including the CIE (International Commission onIllumination) standard clear sky. Lately, these 15 sky luminance models have been adopted as the CIE Standard General Skies.This paper aims to find out representative CIE (International Commission on Illumination) Standard Clear Sky model(s) for three different seasons-winter solstice, equinox, and summer solstice applicable for prevailing clear sky climatic conditions in India [Roorkee]. Indian measured sky luminance distribution database is available only for Roorkee[29 0 51 ' N; 77 0 53 ' E]. To find out the best match between Indian measured sky luminance distribution and each of five CIE Standard Clear sky models, only sky component of spatial illuminance distribution over the working plane of a room was simulated by MATLABfor three different seasons. Daylight Coefficient method has been applied for the simulation using Indian sky luminance database.The simulation has been done for the room with eight different window orientations ranging from 0 0 to 315 0 with an interval of 45 0 to generate data for the entire sky vault. To find out the

  15. Solar Rights

    Broader source: Energy.gov [DOE]

    In June 2010, Louisiana enacted solar rights legislation (HB 751) that prohibits certain entities from unreasonably restricting a property owner from installing a solar collector. Solar collectors...

  16. Solar and Photovoltaic Data from the University of Oregon Solar Radiation Monitoring Laboratory (UO SRML)

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

    The UO SRML is a regional solar radiation data center whose goal is to provide sound solar resource data for planning, design, deployment, and operation of solar electric facilities in the Pacific Northwest. The laboratory has been in operation since 1975. Solar data includes solar resource maps, cumulative summary data, daily totals, monthly averages, single element profile data, parsed TMY2 data, and select multifilter radiometer data. A data plotting program and other software tools are also provided. Shade analysis information and contour plots showing the effect of tilt and orientation on annual solar electric system perfomance make up a large part of the photovoltaics data.(Specialized Interface)

  17. A SIMULATION ASSESSMENT OF THE HEIGHT OF LIGHT SHELVES TO ENHANCE DAYLIGHTING QUALITY IN TROPICAL OFFICE BUILDINGS UNDER OVERCAST SKY CONDITIONS IN DHAKA, BANGLADESH

    E-Print Network [OSTI]

    Md. Ashikur; Rahman Joarder; Zebun Nasreen Ahmed; Andrew Price; Monjur Mourshed

    The objective of this paper is to highlight the effectiveness of light shelves in tropical office buildings to enhance interior daylighting quality. Daylight simulation was performed for custom light shelves for a typical office floor of Dhaka City in Bangladesh, to determine the best possible location under overcast sky conditions. Six alternative models of a 3m high study space were created with varying heights of light shelves. The 3D models were first generated in the Ecotect to study the distribution and uniformity of daylight in the interior space with splitflux method. These models were then exported to a physically-based backward raytracer, Radiance Synthetic Imaging software to generate realistic lighting levels for validating and crosschecking the Ecotect results. The results showed that for achieving light levels closest to specified standards, light shelves at a height of 2m above floor level perform better among the seven alternatives studied including the alternative where no light shelves are present. Finally, the decisions were verified with DAYSIM simulation program to ensure the compliance of the decisions with dynamic annual climate-based daylight performance metrics.

  18. An Overview of Solar Cell Technology Mike McGehee

    E-Print Network [OSTI]

    McGehee, Michael

    An Overview of Solar Cell Technology Mike McGehee Materials Science and Engineering Global ClimateWatt and Evergreen Solar went bankrupt Jon Stewart, The Daily Show Solyndra, SpectraWatt and Evergreen Solar went provide 20 % of that. It takes a panel rated at 5 W, to average 1 W of power through the day and year, sog

  19. Demonstration with Energy and Daylighting Assessment of Sunlight Responsive Thermochromic (SRT) Window Systems

    SciTech Connect (OSTI)

    Broekhuis, Michael; Liposcak, Curtis; Witte, Michael; Henninger, Robert; Zhou, Xiaohui; Petzen, George; Buchanan, Michael; Kumar, Sneh

    2012-03-31T23:59:59.000Z

    Pleotint, LLC was able to successfully extrude thermochromic interlayer for use in the fenestration industry. Pleotint has developed a thermochromic sytem that requires two thermochromic colors to make a neutral color when in the tinted state. These two colors were assembled into a single interlayer called a tri-layer prelam by Crown Operations for use in the glass lamination industry. Various locations, orientations, and constructions of thermochromic windows were studied with funds from this contract. Locations included Australia, California, Costa Rica, Indiana, Iowa, Mexico. Installed orientations included vertical and skylight glazing applications. Various constructions included monolithic, double pane, triple pane constructions. A daylighting study was conducted at LinEl Signature. LinEl Signature has a conference room with a sylight roof system that has a west orientation. The existing LinEl Signature conference room had constant tint 40% VLT transparent skylights. Irradiance meters were installed on the interior and exterior sides of a constant tint skylight. After a month and a half of data collection, the irradiance meters were removed and the constant tint skylights were replaced with Pleotint thermochromic skylight windows. The irradiance meters were reinstalled in the same locations and irradiance data was collected. Both data sets were compared. The data showed that there was a linear relationship with exterior and interior irradiance for the existing constant tint skylights. The thermochromic skylights have a non-linear relationship. The thermochromic skylights were able to limit the amount of irradiance that passed through the thermochromic skylight. A second study of the LinEl Signature conference was performed using EnergyPlus to calculate the amount of Illuminance that passed through constant tint skylights as compared to thermochromic skylights. The constant tint skylights transmitted Illuminance is 2.8 times higher than the thermochromic skylights during the months of May, June, July, August and 1.9 times higher than the thermochromic skylight during the months of March, April, September, October. Calculated illuminance levels were much more consistent as compared to the existing constant tint skylights installed at LinEl Signature. This allows for a more comfortable interior space in regard to glare discomfort and interior lighting control. Lawrence Berkeley National Laboratory was contracted to characterize the performance of the thermochromic interlayer and thermochromic window systems. Thermochromic interlayer was characterized with spectrometer equipment. The thermochromic window systems were characterized using LBNLs Advanced Window Test Facility. A copy of the report can be found in the Appendix. Iowa State University was contracted to compare thermochromic window technology to constant tint technology. Iowa State University conducted the testing at the Energy Resource Station (ERS). The ERS has the ability to simultaneously test side-by-side competing building technologies. The building is equipped with two identical air handling units, each with its own dedicated and identical chiller. One air handling unit supplies the four test rooms designated as the A rooms and the other unit serves the four test rooms designated as the B rooms. There is one A test room and one B test rooms arranged as pairs in a side-by-side design with each pair having a different exposure. There is a pair of test rooms that face the south, an east and west facing pair. Each of the test rooms is a mirror image of its match with identical construction. The rooms are unoccupied; however, the capability to impose false loads on the rooms exists. The false loads and room lighting can be scheduled to simulate various usage patterns. A copy of the report can be found in the Appendix. GARD Analytics was contracted to compare EnergyPlus building simulations to the data recorded at the Iowa ERS. The goal of this research was to validate the building simulation software developed by the US Department of Energy. EnergyPlus is

  20. Is the hourly data from the NREL PV Watts program adjusted for daylight

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating Solar Powerstories on climate compatibleInformation off grid energyIreland:savings

  1. Insignificant solar-terrestrial triggering of earthquakes Jeffrey J. Love1

    E-Print Network [OSTI]

    Thomas, Jeremy N.

    Insignificant solar-terrestrial triggering of earthquakes Jeffrey J. Love1 and Jeremy N. Thomas2 that solar-terrestrial interaction, as measured by sunspots, solar wind velocity, and geomagnetic activity by the corresponding rank of annual, monthly, and daily averages of the solar-terrestrial variables. We measure

  2. Solar Easements

    Broader source: Energy.gov [DOE]

    New Hampshire's "solar skyspace easement" provisions allow property owners to create solar easements in order to create and preserve a right to unobstructed access to solar energy. Easements remain...

  3. Solar Easements

    Broader source: Energy.gov [DOE]

    Virginia's solar easement law is similar to those in effect in other states. The Virginia Solar Easements Act of 1978 allows property owners to create binding solar easements for the purpose of...

  4. Get Daily Energy Analysis Delivered to Your Website | Department...

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

    Get Daily Energy Analysis Delivered to Your Website Get Daily Energy Analysis Delivered to Your Website August 8, 2011 - 3:39pm Addthis Get Daily Energy Analysis Delivered to Your...

  5. The Daily Duration of Transportation: An Econometric and Sociological Approach

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    The Daily Duration of Transportation: An Econometric and Sociological Approach Karl Littlejohn. 2007Monte Verit / Ascona, September #12;#12;3 The Daily Duration of Transportation: An Econometric

  6. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    Estimating Unmeasured Solar Radiation Quantities . . . . . .Appendix C - Appendix 0 - Solar Radiation Glossary. ConversSolar Data a. Solar Radiation. , , . , . . , , , , . , . . .

  7. Community Shared Solar with Solarize

    Broader source: Energy.gov [DOE]

    An overview of the concept behind The Solarize Guidebook, which offers neighborhoods a plan for getting volume discounts when making group purchases of rooftop solar energy systems.

  8. 2011 Daily Log Report #: 2011-00261

    E-Print Network [OSTI]

    Boyce, Richard L.

    2011 Daily Log May 2011 Report #: 2011-00261 Reported: 05/31/2011 1300 Occurred: Same Incident: Medical Emergency Location: University Center Disposition: Report--Closed Comments: Male transported to hospital by ambulance for evaluation and treatment. No Reportable Activity on 05/30/2011 No Reportable

  9. 2009 Daily Log Report #: 2009-00327

    E-Print Network [OSTI]

    Boyce, Richard L.

    2009 Daily Log June 2009 Report #: 2009-00327 Reported: 06/30/09 1118 Occurred: Same Incident: Fire/Smoke Alarm Location: Dorm--Kentucky Hall Disposition: Report--Closed Comments: Alarm activation caused by drywall dust from contractors; fire department responded and cleared the scene. No Reportable Activity

  10. 2010 Daily Log Report #: 2010-00221

    E-Print Network [OSTI]

    Boyce, Richard L.

    2010 Daily Log April 2010 Report #: 2010-00221 Reported: 04/30/10 1034 Occurred: Same Incident: Found/Recovered Property Location: Founders Hall Disposition: Report--Closed Comments: Small purse was found in classroom. Report #: 2010-00220 Reported: 04/30/10 1347 Occurred: 04/30/10 0820 to 0900

  11. 2011 Daily Log Report #: 2011-00295

    E-Print Network [OSTI]

    Boyce, Richard L.

    2011 Daily Log June 2011 Report #: 2011-00295 Reported: 6/30/2011 0813 Occurred: 6/29/2011 1430 Incident: Traffic Crash Location: Sidewalk on Plaza Level Disposition: Report--Closed Comments: Single vehicle accident; no injuries. Report #: 2011-00294 Reported: 06/29/2011 1909 Occurred: Same Incident

  12. 2011 Daily Log Report #: 2011-00317

    E-Print Network [OSTI]

    Boyce, Richard L.

    2011 Daily Log July 2011 Report #: 2011-00317 Reported: 07/30/2011 1446 Occurred: 07/30/2011 1435 Incident: Odor Related Complaint Location: Power Plant Disposition: Report--Closed Comments: Subject reported a strange odor emanating from somewhere in the vicinity; fire department responded and cleared

  13. 2010 Daily Log Report #: 2010-00262

    E-Print Network [OSTI]

    Boyce, Richard L.

    2010 Daily Log June 2010 Report #: 2010-00262 Reported: 06/30/10 0957 Occurred: 06/24/10 1630 to 0957 Incident: Theft Location: Founders Hall Disposition: Report--Open Comments: Several textbooks stolen from office. No Reportable Activity on 06/29/10 Report #: 2010-00261 Reported: 06/28/10 1720

  14. 2010 Daily Log Report #: 2010-00165

    E-Print Network [OSTI]

    Boyce, Richard L.

    2010 Daily Log March 2010 Report #: 2010-00165 Reported: 03/31/10 1525 Occurred: 03/31/10 1520 Incident: Traffic Crash Location: Nunn Drive Disposition: Report--Closed Comments: Two vehicle accident; vehicle towed; no injuries. Report #: 2010-00164 Reported: 03/31/10 1121 Occurred: 03/31/10 0800 to 1100

  15. 2011 Daily Log Report #: 2011-00168

    E-Print Network [OSTI]

    Boyce, Richard L.

    2011 Daily Log March 2011 Report #: 2011-00168 Reported: 03/31/2011 1237 Occurred: 03/31/2011 1235 Incident: Medical Emergency Location: Outside of Student Union Disposition: Report--Closed Comments: Female transported to hospital by ambulance for medical treatment. Report #: 2011-00167 Reported: 03/31/2011 1116

  16. 2009 Daily Log Report #: 2009-00202

    E-Print Network [OSTI]

    Boyce, Richard L.

    2009 Daily Log March 2009 Report #: 2009-00202 Reported: 03/31/09 2045 Occurred: 03/29/09 1400 to 03/30/09 2000 Incident: Theft Location: Lot Q Disposition: Report--Open Comments: GPS System stolen from unlocked vehicle. Report #: 2009-00201 Reported: 03/31/09 1833 Occurred: Same Incident: Fire

  17. 2009 Daily Log Report #: 2009-00269

    E-Print Network [OSTI]

    Boyce, Richard L.

    2009 Daily Log April 2009 Report #: 2009-00269 Reported: 04/30/09 1508 Occurred: Same Incident: Traffic Crash Location: Johns Hill Road and Kenton Drive Disposition: Report--Closed Comments: Two vehicle accident; no injuries. Report #: 2009-00268 Reported: 04/30/09 1049 Occurred: Same Incident: Traffic Crash

  18. 2011 Daily Log Report #: 2011-00229

    E-Print Network [OSTI]

    Boyce, Richard L.

    2011 Daily Log April 2011 Report #: 2011-00229 Reported: 04/29/2011 2327 Occurred: 04/29/2011 2325 Incident: Medical Emergency Location: University Center Disposition: Report--Closed Comments: Female transported by ambulance to hospital for medical treatment. Report #: 2011-00228 Reported: 04/29/2011 1702

  19. Fall 2013 BOSTONIA Last year, the Daily

    E-Print Network [OSTI]

    Spence, Harlan Ernest

    metropolitan area. The website was referring to the people of Boston, of course, not the city itself. But what if the city itself were smart? What if technology, designed by the smart people who work in Boston, could help us save time and energy and spare us from daily frustrations? We talked to some BU researchers who

  20. INVEST IN YOUR BONES Daily Activities

    E-Print Network [OSTI]

    INVEST IN YOUR BONES Daily Activities Leaflet 3 Another osteoporosis prevention step to decrease lifestyle. Let's see how you can do that. If you have osteoporosis, follow carefully the activity program. Remember the following about osteoporosis: is largely preventable and treatable is a serious

  1. Philadelphia, Pennsylvania: Solar in Action (Brochure), Solar...

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

    Philadelphia, Pennsylvania: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Philadelphia, Pennsylvania: Solar in Action (Brochure),...

  2. Daily rhythms in mobile telephone communication

    E-Print Network [OSTI]

    Aledavood, Talayeh; Roberts, Sam G B; Reed-Tsochas, Felix; Moro, Esteban; Dunbar, Robin I M; Saramki, Jari

    2015-01-01T23:59:59.000Z

    Circadian rhythms are known to be important drivers of human activity and the recent availability of electronic records of human behaviour has provided fine-grained data of temporal patterns of activity on a large scale. Further, questionnaire studies have identified important individual differences in circadian rhythms, with people broadly categorised into morning-like or evening-like individuals. However, little is known about the social aspects of these circadian rhythms, or how they vary across individuals. In this study we use a unique 18-month dataset that combines mobile phone calls and questionnaire data to examine individual differences in the daily rhythms of mobile phone activity. We demonstrate clear individual differences in daily patterns of phone calls, and show that these individual differences are persistent despite a high degree of turnover in the individuals' social networks. Further, women's calls were longer than men's calls, especially during the evening and at night, and these calls wer...

  3. SOLAR-POWERED AUTONOMOUS UNDERWATER VEHICLE DEVELOPMENT James Jalbert, John Baker, John Duchesney, Paul Pietryka, William Dalton

    E-Print Network [OSTI]

    batteries daily using solar panels to convert solar energy to electrical energy. #12;· Operate at depthsSOLAR-POWERED AUTONOMOUS UNDERWATER VEHICLE DEVELOPMENT James Jalbert, John Baker, John Duchesney in such applications. The concept of a vehicle that would allow on-station recharging of batteries, using solar cells

  4. ADAPTIVE FULL-SPECTRUM SOLAR ENERGY SYSTEMS CROSS-CUTTING R&D ON ADAPTIVE FULL-SPECTRUM SOLAR ENERGY SYSTEMS FOR MORE EFFICIENT AND AFFORDABLE USE OF SOLAR ENERGY IN BUILDINGS AND HYBRID PHOTOBIOREACTORS

    SciTech Connect (OSTI)

    Byard D. Wood; Jeff D. Muhs

    2004-08-01T23:59:59.000Z

    This RD&D project is a three year team effort to develop a hybrid solar lighting (HSL) system that transports daylight from a paraboloidal dish concentrator to a luminaire via a bundle of small core or a large core polymer fiber optics. The luminaire can be a device to distribute sunlight into a space for the production of algae or it can be a device that is a combination of daylighting and electric lighting for space/task lighting. In this project, the sunlight is collected using a one-meter paraboloidal concentrator dish with two-axis tracking. For the second generation (alpha) system, the secondary mirror is an ellipsoidal mirror that directs the visible light into a bundle of small-core fibers. The IR spectrum is filtered out to minimize unnecessary heating at the fiber entrance region. This report describes the following investigations of various aspects of the system. Taken as a whole, they confirm significant progress towards the technical feasibility and commercial viability of this technology. (1) TRNSYS Modeling of a Hybrid Lighting System: Building Energy Loads and Chromaticity Analysis; (2) High Lumens Screening Test Setup for Optical Fibers; (3) Photo-Induced Heating in Plastic Optical Fiber Bundles; (4) Low-Cost Primary Mirror Development; (5) Potential Applications for Hybrid Solar Lighting; (6) Photobioreactor Population Experiments and Productivity Measurements; and (7) Development of a Microalgal CO2-Biofixation Photobioreactor.

  5. Solar Easements

    Broader source: Energy.gov [DOE]

    Rhode Island allows property owners to establish solar easements in the same manner and with the same effect as a conveyance of an interest in real property. Solar easements must be created in...

  6. Solar Forecasting

    Broader source: Energy.gov [DOE]

    On December 7, 2012,DOE announced $8 million to fund two solar projects that are helping utilities and grid operators better forecast when, where, and how much solar power will be produced at U.S....

  7. Solar Easements

    Broader source: Energy.gov [DOE]

    Kansas' solar easement provisions do not create an automatic right to sunlight. Rather, they allow parties to voluntarily enter into solar easement contracts for the purpose of ensuring adequate...

  8. Solar Rights

    Broader source: Energy.gov [DOE]

    Cities and counties in North Carolina generally may not adopt ordinances prohibiting the installation of "a solar collector that gathers solar radiation as a substitute for traditional energy for...

  9. Solar thermal powered desalination: membrane versus distillation technologies

    E-Print Network [OSTI]

    , in terms of the volume of water produced for the energy consumed. The two most commonly encountered. The daily desalinated water output per square metre of solar collector area is estimated for a number in remediation of dryland salinity, a critical review of the literature on medium to large scale solar driven (or

  10. TWP-ICE Daily Synoptic Overview

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security AdministrationcontrollerNanocrystallineForeign ObjectOUR TECHNOLOGIES TECHNOLOGIESCC2JanuaryDaily

  11. Sunspot Unit Areas: A New Parameter to Describe the Long-term Solar Variability

    E-Print Network [OSTI]

    650011, China Big Bear Solar Observatory, New Jersey Institute of Technology, Big Bear City, CA 92314Sunspot Unit Areas: A New Parameter to Describe the Long-term Solar Variability K.J. Li1,2 , J. Qiu). It describes the daily average size of sunspots produced by the dynamo in a solar cycle. The monthly average

  12. Inclusion of Building Envelope Thermal Lag Effects in Linear Regression Models of Daily Basis Building Energy Use Data

    E-Print Network [OSTI]

    Masuda, H.; Claridge, D. E.

    2012-01-01T23:59:59.000Z

    Inclusion?of?Building?Envelope?Thermal?Lag? Effects?in?Linear?Regression?Models?of?Daily? Basis?Building?Energy?Use?Data The?12th International?Conference?for?Enhanced?Building?Operations October?22nd?26th,?2012 Manchester,?UK Hiroko...?for?simple?energy?performance?analysis ? 24?hour?cycle?variations?are?averaged?out?in?daily?data. ? The?dominant?driving?terms?of?most?buildings?follow?a?24?h?cycle.?(Rabl,?1992)? solar?irradiance,?OA?temperature,?ventilation,?occupancy?level,?lights?and?equipment?loads,? delayed?loads?due?to?thermal...

  13. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    Estimating Unmeasured Solar Radiation Quantities . . . . . .Weather Data . . . . . , . , . . . . . . . . . .Solar DataB. l'he Solar Constant. . . . . . C. Solar Time and Standard

  14. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    and forecasting of solar radiation data: a review,forecasting of solar- radiation data, Solar Energy, vol.sequences of global solar radiation data for isolated sites:

  15. Solar Mapper

    Broader source: Energy.gov [DOE]

    Interactive, online mapping tool providing access to spatial data related to siting utility-scale solar facilities in the southwestern United States.

  16. Solar Rights

    Broader source: Energy.gov [DOE]

    Maine law requires that any municipal ordinance, bylaw, or regulation adopted after September 30, 2009 regulating solar energy devices on residential property follow certain requirements. The rules...

  17. Solar Energy.

    E-Print Network [OSTI]

    Bafana, Ramzi

    2014-01-01T23:59:59.000Z

    ??This thesis is about Photovoltaic (PV) cells and its stresses in various directions by calculating the power generated using solar cells under different conditions to (more)

  18. Solar Car

    SciTech Connect (OSTI)

    None

    2010-01-01T23:59:59.000Z

    Des Moines Central Academy Middle School students compete in the Solar Car Challenge at the National Science Bowl, May 2 in Washington D.C.

  19. ADAPTIVE FULL-SPECTRUM SOLAR ENERGY SYSTEMS CROSS-CUTTING R&D ON ADAPTIVE FULL-SPECTRUM SOLAR ENERGY SYSTEMS FOR MORE EFFICIENT AND AFFORDABLE USE OF SOLAR ENERGY IN BUILDINGS AND HYBRID PHOTOBIOREACTORS

    SciTech Connect (OSTI)

    Byard D. Wood; Jeff D. Muhs

    2005-02-01T23:59:59.000Z

    This RD&D project is a three year team effort to develop a hybrid solar lighting (HSL) system that transports daylight from a paraboloidal dish concentrator to a luminaire via a bundle of small core or a large core polymer fiber optics. The luminaire can be a device to distribute sunlight into a space for the production of algae or it can be a device that is a combination of daylighting and electric lighting for space/task lighting. In this project, the sunlight is collected using a one-meter paraboloidal concentrator dish with two-axis tracking. For the second generation (alpha) system, the secondary mirror is an ellipsoidal mirror that directs the visible light into a bundle of small-core fibers. The IR spectrum is filtered out to minimize unnecessary heating at the fiber entrance region. This report describes the following investigations of various aspects of the system: (1) Performance specifications were developed for the tracking subsystem and collector optics, (2) Thermal management experiments for the fiber optic bundle entrance region, and (3) Bioreactor testing, cost-modeling, and redesign. Much of the planned work has been slowed due to significant procurement delays of the primary mirror. However, taken as a whole, they do confirm progress towards the technical feasibility and commercial viability of this technology. Due to this procurement delay, a no-cost extension of the project completion date has been requested and approved.

  20. Daylighting | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) " ,"ClickPipelinesProvedDecember 2005Department ofDOE AccidentWaste IsolationDashboardsDavid

  1. Window Daylighting Demo

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of| Department ofDepartment ofAnnouncementAugust 30,PowerJuneenabledandWindow

  2. Milk, Eggs and Solar: Grocery Co-Op Puts Photovoltaics to Work...

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

    Market, the 3,000 daily customers also learn about the co-op's 136 rooftop photovoltaic panels and monthly "Solar Made Simple" seminars. Reducing energy demand With freezer and...

  3. A Method for Calculating Reference Evapotranspiration on Daily Time Scales

    E-Print Network [OSTI]

    Farmer, William

    Measures of reference evapotranspiration are essential for applications of agricultural management and water resources engineering. Using numerous esoteric variables, one can calculate daily reference evapotranspiration ...

  4. Solar Rights

    Broader source: Energy.gov [DOE]

    Hawaii law prohibits the creation of any covenant or restriction contained in any document restricting the installation or use of a solar energy system on a residential dwelling or townhouse. ...

  5. Predicting Daily Net Radiation Using Minimum Climatological Data1

    E-Print Network [OSTI]

    Predicting Daily Net Radiation Using Minimum Climatological Data1 S. Irmak, M.ASCE2 ; A. Irmak3 ; J for predicting daily Rn have been widely used. However, when the paucity of detailed climatological data with National Weather Service climatological datasets that only record Tmax and Tmin on a regular basis. DOI: 10

  6. SCIENTIFIC NOTE Variations in daily quality assurance dosimetry from device

    E-Print Network [OSTI]

    Yu, K.N.

    SCIENTIFIC NOTE Variations in daily quality assurance dosimetry from device levelling, feet procedures are an essential part of radiotherapy medical physics. Devices such as the Sun Nuclear, DQA3 are effective tools for analysis of daily dosimetry including flatness, symmetry, energy, field size and central

  7. A Feasibility Study: Mining Daily Traces for Home Heating Control

    E-Print Network [OSTI]

    Whitehouse, Kamin

    A Feasibility Study: Mining Daily Traces for Home Heating Control Dezhi Hong and Kamin Whitehouse savings as well as 14.9%59.2% reduction in miss time. Keywords Energy, home heating, daily traces, prediction 1. INTRODUCTION Heating, ventilation and cooling (HVAC) contributes most to a home's energy bills

  8. Appendix 22 Draft Nutrient Management Plan and Total Maximum Daily

    E-Print Network [OSTI]

    Appendix 22 Draft Nutrient Management Plan and Total Maximum Daily Load for Flathead Lake, Montana. #12;11/01/01 DRAFT i October 30, 2001 Draft Nutrient Management Plan and Total Maximum Daily Load..............................................................................................................................2-11 SECTION 3.0 APPLICABLE WATER QUALITY STANDARDS

  9. EnergyPlus Run Time Analysis

    E-Print Network [OSTI]

    Hong, Tianzhen

    2009-01-01T23:59:59.000Z

    solve the building envelope thermal dynamics with the HVACenvelope heat transfer, solar shading, daylighting, thermal

  10. INDEEP ANNUAL REPORT (1995-1996)

    E-Print Network [OSTI]

    Fine, Edward

    2010-01-01T23:59:59.000Z

    storage Solar Heating and Cooling Techniques Passive heatingDaylighting Passive cooling techniques Evaporative cooling

  11. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    2.1.2 European Solar Radiation Atlas (ESRA)2.4 Evaluation of Solar Forecasting . . . . . . . . .2.4.1 Solar Variability . . . . . . . . . . . . .

  12. Residential Solar Valuation Rates

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

    Residential Solar Valuation Rates Karl R. Rbago Rbago Energy LLC 1 The Ideal Residential Solar Tariff Fair to the utility and non-solar customers Fair compensation to...

  13. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01T23:59:59.000Z

    2008, uses concentrated solar power to split water. Figurethe main reason the potential for solar power is boundless.a clean energy source, solar power is inexhaustible, fairly

  14. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    Solar Energy Laboratory 1303 Engineering Research Building UniversitySolar Energy Laboratory 1303 Engineering Research laboratory UniversitySolar Energy Group, Energy and Lawrence Berkeley Laboratory University

  15. Nanocrystal Solar Cells

    E-Print Network [OSTI]

    Gur, Ilan

    2006-01-01T23:59:59.000Z

    Nov, 2005). Chapter 4 Hybrid solar cells with 3-dimensionalinorganic nanocrystal solar cells 5.1 Introduction In recentoperation of organic based solar cells and distinguish them

  16. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    room )I I( I I ,i I CALIFORNIA SOLAR DATA MANUAL I. ! I ienergy resource. The California Solar Data Manual describestowards fulfilling California's solar data needs is the

  17. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    for Reno, Nevada . . . . . (Q) Solar Data for China Lake/using Nominal Solar Profiles China Lake/Inyokern ANGLE OFStations - China Lake, Edwards Monthly Latitude: Jan SOLAR

  18. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    Figure 6.3: Birds-eye view of solar array deployment siteBirds-eye 7. Birds-eye view of of solar solar array array

  19. Solar Contractor Licensing

    Broader source: Energy.gov [DOE]

    The California Contractors State License Board administers contractor licenses. The C-46 Solar Contractor license covers active solar water and space heating systems, solar pool heating systems,...

  20. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    2.1.2 European Solar Radiation Atlas (ESRA)for supplementing solar radiation network data, FinalEstimating incident solar radiation at the surface from geo-

  1. Solar Resource Assessment

    Broader source: Energy.gov [DOE]

    DOE solar resource research focuses on understanding historical solar resource patterns and making future predictions, both of which are needed to support reliable power system operation. As solar...

  2. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01T23:59:59.000Z

    As a clean energy source, solar power is inexhaustible,renewables for energy sources, including solar power. Also,Requirements Energy Source Natural Gas Nuclear Solar Wind

  3. Solar ADEPT: Efficient Solar Energy Systems

    SciTech Connect (OSTI)

    None

    2011-01-01T23:59:59.000Z

    Solar ADEPT Project: The 7 projects that make up ARPA-E's Solar ADEPT program, short for 'Solar Agile Delivery of Electrical Power Technology,' aim to improve the performance of photovoltaic (PV) solar energy systems, which convert the sun's rays into electricity. Solar ADEPT projects are integrating advanced electrical components into PV systems to make the process of converting solar energy to electricity more efficient.

  4. Concentrating Solar Power

    SciTech Connect (OSTI)

    Not Available

    2008-09-01T23:59:59.000Z

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

  5. CUTTING SOLAR RED TAPECUTTING SOLAR RED TAPE Evergreen State Solar PartnershipEvergreen State Solar Partnership

    E-Print Network [OSTI]

    CUTTING SOLAR RED TAPECUTTING SOLAR RED TAPE Evergreen State Solar PartnershipEvergreen State Solar Partnership Rooftop Solar Challenge 1 Sunshot #12;WASHINGTON PV CONTEXTWASHINGTON PV CONTEXT 285 cities, 39 Installations happen where process is easier #12;EVERGREEN STATE SOLAR PARTNERSHIP Commerce NWSEEDEdmonds

  6. SOLAR ENERGY FOR ACADEMIC INSTITUTIONS Solar Suitability Assessment

    E-Print Network [OSTI]

    Brownstone, Rob

    SOLAR ENERGY FOR ACADEMIC INSTITUTIONS Solar Suitability Assessment of Dalhousie University.................................................................................................. 2 2.2 Solar Radiation Data for Calculating Solar Energy Resource .................... 3 3 Campus.1 Evaluation of Suitability for Solar Energy Generation................................ 12 4.2 Solar

  7. Boston Massachusetts: Solar in Action (Brochure), Solar America...

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

    Solar America Cities, Energy Efficiency & Renewable Energy (EERE) San Francisco, California: Solar in Action (Brochure), Solar America Cities, Energy Efficiency &...

  8. Solar Impulse's Solar-Powered Plane

    ScienceCinema (OSTI)

    Moniz, Ernest; Piccard, Bertrand; Reicher, Dan

    2014-01-07T23:59:59.000Z

    Solar Impulse lands in Washington, DC at Washington Dulles International Airport as part of its journey across the United States. Secretary Ernest Moniz speaks about how advancements like those at the Department of Energy are leading the way for innovations like the solar-powered plane. Footage of the solar-powered plane courtesy of Solar Impulse.

  9. Petrovay: Solar physics Helioseismology SOLAR OSCILLATIONS: INTRODUCTION

    E-Print Network [OSTI]

    Petrovay, Kristóf

    : Solar oscillations first observed by both Doppler and intensity method (Leighton, Noyes & Simon 1962: ApPetrovay: Solar physics Helioseismology SOLAR OSCILLATIONS: INTRODUCTION Small departures from hydrostatic equilibrium caused by ­ turbulent convection ­ localized events related to solar activity (e

  10. Solar Impulse's Solar-Powered Plane

    SciTech Connect (OSTI)

    Moniz, Ernest; Piccard, Bertrand; Reicher, Dan

    2013-07-08T23:59:59.000Z

    Solar Impulse lands in Washington, DC at Washington Dulles International Airport as part of its journey across the United States. Secretary Ernest Moniz speaks about how advancements like those at the Department of Energy are leading the way for innovations like the solar-powered plane. Footage of the solar-powered plane courtesy of Solar Impulse.

  11. Berkeley, California: Solar in Action (Brochure), Solar America...

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

    Berkeley, California: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Berkeley, California: Solar in Action (Brochure), Solar America...

  12. China Glass Solar aka CG Solar formerly Weihai Bluestar Terra...

    Open Energy Info (EERE)

    Solar aka CG Solar formerly Weihai Bluestar Terra Photovoltaic Co Ltd Jump to: navigation, search Name: China Glass Solar (aka CG Solar, formerly Weihai Bluestar Terra Photovoltaic...

  13. Tucson, Arizona: Solar in Action (Brochure), Solar America Cities...

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

    Tucson, Arizona: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Tucson, Arizona: Solar in Action (Brochure), Solar America Cities,...

  14. Austin, Texas: Solar in Action (Brochure), Solar America Cities...

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

    Austin, Texas: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Austin, Texas: Solar in Action (Brochure), Solar America Cities, Energy...

  15. Pittsburgh, Pennsylvania: Solar in Action (Brochure), Solar America...

    Energy Savers [EERE]

    Pittsburgh, Pennsylvania: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Pittsburgh, Pennsylvania: Solar in Action (Brochure), Solar...

  16. Seattle, Washington: Solar in Action (Brochure), Solar America...

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

    Seattle, Washington: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Seattle, Washington: Solar in Action (Brochure), Solar America...

  17. Knoxville, Tennessee: Solar in Action (Brochure), Solar America...

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

    Knoxville, Tennessee: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Knoxville, Tennessee: Solar in Action (Brochure), Solar America...

  18. EIS-0449: Solar Millennium Blythe Solar Power Project in Riverside...

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

    9: Solar Millennium Blythe Solar Power Project in Riverside County, CA EIS-0449: Solar Millennium Blythe Solar Power Project in Riverside County, CA December 10, 2010 EIS-0449:...

  19. EA-1683: Abengoa Solar's Solana Concentrating Solar Power Facility...

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

    83: Abengoa Solar's Solana Concentrating Solar Power Facility, Gila Bend, AZ EA-1683: Abengoa Solar's Solana Concentrating Solar Power Facility, Gila Bend, AZ May 3, 2010 EA-1683:...

  20. San Antonio, Texas: Solar in Action (Brochure), Solar America...

    Energy Savers [EERE]

    San Antonio, Texas: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) San Antonio, Texas: Solar in Action (Brochure), Solar America...

  1. Denver, Colorado: Solar in Action (Brochure), Solar America Cities...

    Energy Savers [EERE]

    Denver, Colorado: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Denver, Colorado: Solar in Action (Brochure), Solar America Cities,...

  2. Milwaukee, Wisconsin: Solar in Action (Brochure), Solar America...

    Energy Savers [EERE]

    Milwaukee, Wisconsin: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Milwaukee, Wisconsin: Solar in Action (Brochure), Solar America...

  3. San Diego, California: Solar in Action (Brochure), Solar America...

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

    San Diego, California: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) San Diego, California: Solar in Action (Brochure), Solar...

  4. Ann Arbor, Michigan: Solar in Action (Brochure), Solar America...

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

    Ann Arbor, Michigan: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Ann Arbor, Michigan: Solar in Action (Brochure), Solar America...

  5. Madison, Wisconsin: Solar in Action (Brochure), Solar America...

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

    Madison, Wisconsin: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) Madison, Wisconsin: Solar in Action (Brochure), Solar America...

  6. Solar Neutrinos

    E-Print Network [OSTI]

    R. G. H. Robertson

    2006-02-05T23:59:59.000Z

    Experimental work with solar neutrinos has illuminated the properties of neutrinos and tested models of how the sun produces its energy. Three experiments continue to take data, and at least seven are in various stages of planning or construction. In this review, the current experimental status is summarized, and future directions explored with a focus on the effects of a non-zero theta-13 and the interesting possibility of directly testing the luminosity constraint. Such a confrontation at the few-percent level would provide a prediction of the solar irradiance tens of thousands of years in the future for comparison with the present-day irradiance. A model-independent analysis of existing low-energy data shows good agreement between the neutrino and electromagnetic luminosities at the +/- 20 % level.

  7. Solar collector

    SciTech Connect (OSTI)

    Dostrovsky, I.

    1981-02-10T23:59:59.000Z

    A solar collector unit comprises a body of rigid thermally insulating material having a surface in the shape of about half a cylindrical parabola, the parabolic surface being provided with a reflective surface, a conduit being positioned with its long axis in the median plane of the parabola, said conduit serving as conduit for the heat-exchange medium, the surface of said conduit facing the parabolic surface being a selective surface, a transparent cover being provided on top of the device.

  8. Solar Blog

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: AlternativeEnvironment,Institutes and ResponseStaffServicesFuture |Assurance PlanCD-4),Solar96426

  9. Solar Innovator | Alta Devices

    ScienceCinema (OSTI)

    Mattos, Laila; Le, Minh

    2013-05-29T23:59:59.000Z

    Selected to participate in the Energy Department's SunShot Initiative, Alta Devices produces solar cells that convert sunlight into electricity at world record-breaking levels of efficiency. Through its innovative solar technology Alta is helping bring down the cost of solar. Learn more about the Energy Department's efforts to advance solar technology at energy.gov/solar .

  10. Solar neutrinos and the solar composition problem

    E-Print Network [OSTI]

    Carlos Pena-Garay; Aldo Serenelli

    2008-11-16T23:59:59.000Z

    Standard solar models (SSM) are facing nowadays a new puzzle: the solar composition problem. New determinations of solar metal abundances lead SSM calculations to conflict with helioseismological measurements, showing discrepancies that extend from the convection zone to the solar core and can not be easily assigned to deficiencies in the modelling of the solar convection zone. We present updated solar neutrino fluxes and uncertainties for two SSM with high (old) and low (new) solar metallicity determinations. The uncertainties in iron and carbon abundances are the largest contribution to the uncertainties of the solar neutrino fluxes. The uncertainty on the ^14N+p -> ^15O+g rate is the largest of the non-composition uncertainties to the CNO neutrino fluxes. We propose an independent method to help identify which SSM is the correct one. Present neutrino data can not distinguish the solar neutrino predictions of both models but ongoing measurements can help to solve the puzzle.

  11. E-Print Network 3.0 - annual average daily traffic Sample Search...

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

    Data Systems 2000. Annual Average Daily Truck Traffic on the California State... Lockout and Non-Lockout Weekdays Average Daily Traffic Volume (vehday) All Cars Trucks ......

  12. E-Print Network 3.0 - average daily traffic Sample Search Results

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

    Data Systems 2000. Annual Average Daily Truck Traffic on the California State... Lockout and Non-Lockout Weekdays Average Daily Traffic Volume (vehday) All Cars Trucks...

  13. Assessment of solar and wind energy resources in Ethiopia. I. Solar energy

    SciTech Connect (OSTI)

    Drake, F.; Mulugetta, Y. [Univ. of Leeds (United Kingdom)] [Univ. of Leeds (United Kingdom)

    1996-09-01T23:59:59.000Z

    This paper describes how data from a variety of sources are merged to present new countrywide maps of the solar energy distribution over Ethiopia. The spatial coverage of stations with radiation data was found to be unsatisfactory for the purpose of a countrywide solar energy assessment exercise. Therefore, radiation had to be predicted from sunshine hours by employing empirical models. Using data from seven stations in Ethiopia, linear and quadratic correlation relationships between monthly mean daily solar radiation and sunshine hours per day have been developed. These regional models show a distinct improvement over previously employed countrywide models. To produce a national solar-energy distribution profile, a spatial extension of the radiation/sunshine relationships had to be carried out. To do this, the intercepts(a) and slopes(b) of each of the seven linear regression equations and another six from previous studies, completed in neighbouring Sudan, Kenya and Yemen, were used to interpolate the corresponding values to areas between them. Subsequent to these procedures, 142 stations providing only sunshine data were assigned their `appropriate` a and b values to estimate the amount of solar radiation received, which was then used to produce annual and monthly solar radiation distribution maps for Ethiopia. The results show that in all regions solar energy is an abundant resource. 19 refs., 11 figs., 4 tabs.

  14. Solar Decathlon

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage » SearchEnergyDepartmentScoping Study |4 Solar Background Document 4U.S.

  15. Solar Power

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBiSite CulturalDepartment ofatRenewable Energy »Buildings Solar

  16. Nanocrystal Solar Cells

    E-Print Network [OSTI]

    Gur, Ilan

    2006-01-01T23:59:59.000Z

    Nov, 2005). Chapter 4 Hybrid solar cells with 3-dimensional5 All-inorganic nanocrystal solar cells 5.1 Introduction Inoperation of organic based solar cells and distinguish them

  17. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    P(t) and the boring solar sensor. Denoting the bulk veloci equipped with solar irradiance sensors, see Figure 10.3.f that utilizes the low solar cost sensor network deployment

  18. Solar Energy Entrepreneurs

    E-Print Network [OSTI]

    Rubloff, Gary W.

    Solar Energy Entrepreneurs Meeting MD, DC, DE, VA Region May 31, 2012 #12;Solar Energy Entrepreneurs Meeting MD, DC, DE, VA Region Meeting Objectives should attend if you.... · ... work in the solar energy market

  19. Solar Equipment Certification

    Broader source: Energy.gov [DOE]

    Under the Solar Energy Standards Act of 1976, the Florida Solar Energy Center (FSEC) is responsible for certifying all solar equipment sold in Florida. A manufacturer who wishes to have their...

  20. Solar Contractor Licensing

    Broader source: Energy.gov [DOE]

    Nevada law requires that solar energy system installers be licensed by the Nevada State Contractors Board. Contractors may be licensed under License Classification C-37 (solar contracting for solar...

  1. Solar Heating Contractor Licensing

    Broader source: Energy.gov [DOE]

    Michigan offers a solar heating contractor specialty license to individuals who have at least three years of experience installing solar equipment under the direction of a licensed solar contractor...

  2. JEA- Solar Incentive Program

    Broader source: Energy.gov [DOE]

    The JEA Solar Incentive Program provides rebates to JEA's residential customers who install new and retrofit solar hot water heaters on their homes. The rebate is worth $800 for new solar thermal...

  3. Solar collector

    DOE Patents [OSTI]

    Wilhelm, William G. (Cutchogue, NY)

    1982-01-01T23:59:59.000Z

    The field of this invention is solar collectors, and more particularly, the invention pertains to a flat plate collector that employs high performance thin films. The solar collector of this invention overcomes several problems in this field, such as excessive hardware, cost and reliability, and other prior art drawbacks outlined in the specification. In the preferred form, the apparatus features a substantially rigid planar frame (14). A thin film window (42) is bonded to one planar side of the frame. An absorber (24) of laminate construction is comprised of two thin film layers (24a, 24b) that are sealed perimetrically. The layers (24a, 24b) define a fluid-tight planar envelope (24c) of large surface area to volume through which a heat transfer fluid flows. Absorber (24) is bonded to the other planar side of the frame. The thin film construction of the absorber assures substantially full envelope wetting and thus good efficiency. The window and absorber films stress the frame adding to the overall strength of the collector.

  4. Description: Lithium batteries are used daily in our work

    E-Print Network [OSTI]

    Description: Lithium batteries are used daily in our work activities from flashlights, cell phones containing one SureFire 3-volt non-rechargeable 123 lithium battery and one Interstate 3-volt non-rechargeable 123 lithium battery. A Garage Mechanic had the SureFire flashlight in his shirt pocket with the lens

  5. RESPITE SERVICES Enhancing the Quality of Daily Life for

    E-Print Network [OSTI]

    Tipple, Brett

    of income more negative attitude toward care recipient loss of free time abuse sleeplessness exhaustionRESPITE SERVICES Enhancing the Quality of Daily Life for Caregivers and Care Receivers PR E PA R E is that the loved ones in need of care usually get better quality care from their caregivers because the care

  6. Modelling Daily Multivariate Pollutant Data at Multiple Sites

    E-Print Network [OSTI]

    Washington at Seattle, University of

    . In conducting such time series studies to investigate the relationship between air pollution and a health investigating the health effects of daily changes in air pollution, the exposures are essentially treated effects of air pollution. Alternative objectives include the design problem of the positioning of a new

  7. amplitude daily geomagnetic: Topics by E-print Network

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

    of the energy input. While the AL index is reasonably well related to the solar wind energy functions, the AU index shows a substantially poorer relationship. In addition, high...

  8. Solar Industry At Work: Streamlining Home Solar Installation...

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

    Solar Industry At Work: Streamlining Home Solar Installation Solar Industry At Work: Streamlining Home Solar Installation June 12, 2012 - 11:59am Addthis Sunrun is a home solar...

  9. Concentrated Solar Thermoelectric Power

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

    CONCENTRATING SOLAR POWER PROGRAM REVIEW 2013 Concentrated Solar Thermoelectric Power Principal Investigator: Prof. Gang Chen Massachusetts Institute of Technology Cambridge, MA...

  10. Solar heating in Colombia.

    E-Print Network [OSTI]

    Skytt, Johanna

    2012-01-01T23:59:59.000Z

    ?? This report describes the process of a thesis implemented in Colombia concerning solar energy. The project was to install a self-circulating solar heating system, (more)

  11. Solar | Department of Energy

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

    Concentrating Solar Power Plant The Ivanpah Solar Energy Generating System has the capacity to generate 392 megawattsof clean electricity -- enough to power 94,400 average...

  12. Application of solar energy.

    E-Print Network [OSTI]

    Li, Jingcheng

    2010-01-01T23:59:59.000Z

    ??The purpose of the project is to learn the principle and application of solar energy and to know the situation of solar energy in China (more)

  13. Solar Contractor Licensing

    Broader source: Energy.gov [DOE]

    Hawaii offers several specialty licenses for solar contractors through Hawaiis Department of Commerce and Consumer Affairs. The following specialty licenses are available: Solar Power Systems...

  14. Your Solar Home

    Broader source: Energy.gov [DOE]

    Solar Schoolhouse Education supplement for the Sacramento Bee to introduce solar to elementary school children and introduce the design and AD contest for local students.

  15. Residential Solar Rights

    Broader source: Energy.gov [DOE]

    In 2007, New Jersey enacted legislation preventing homeowners associations from prohibiting the installation of solar collectors on certain types of residential properties. The term "solar...

  16. Department of Energy - Solar

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

    307 en Using Passive Solar Design to Save Money and Energy http:energy.govenergysaverarticlesusing-passive-solar-design-save-money-and-energy

  17. Subsidizing Global Solar Power.

    E-Print Network [OSTI]

    Arnesson, Daniel

    2013-01-01T23:59:59.000Z

    ?? With national cuts on solar PV subsidies and the current oversupply of panels, the global solar market is clearly threatened by a contraction. Yet, (more)

  18. Concentrated Solar Power Generation.

    E-Print Network [OSTI]

    Jin, Zhilei

    2013-01-01T23:59:59.000Z

    ??Solar power generation is the most promising technology to transfer energy consumption reliance from fossil fuel to renewable sources. Concentrated solar power generation is a (more)

  19. Solar power satellites.

    E-Print Network [OSTI]

    Palmas, Alessandro

    2013-01-01T23:59:59.000Z

    ??During energy crisis at the end of the Sixties, a new idea to exploit solar energy arose: Solar Power Satellites. These satellites need a huge (more)

  20. Philadelphia, Pennsylvania: Solar in Action (Brochure), Solar...

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

    October 2011 Solar in Action Philadelphia was designated by the U.S. Department of Energy (DOE) on March 28, 2008, as Solar America City. At that time, the city presented a...

  1. Solar in Cold, Cloudy Climates

    Broader source: Energy.gov [DOE]

    Presentation delivered by Chuck Marken during the 2009 Northeastern Solar Cities Conference Solar Survey session.

  2. Sandia National Laboratories: Solar Resource Assessment

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

    Tagged with: Energy * photovoltaic * Photovoltaics * PV * Renewable Energy * solar * Solar Energy * Solar Research * Solar Resource Assessment Comments are closed. Renewable...

  3. Solar Radiative Heating in First Year Sea Ice M.J. McGuinness 1 , K.A. Landman 2 , H.J. Trodahl 3 , A.E. Pantoja 3

    E-Print Network [OSTI]

    Solar Radiative Heating in First Year Sea Ice M.J. McGuinness 1 , K.A. Landman 2 , H.J. Trodahl 3 ice show daily oscillations consistent with heating by solar radiation. We present and solve a heat for solar power absorption based on Monte Carlo scatter­ ing simulations of penetrating photons. We observe

  4. NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Modelling Concentrating Solar Power

    E-Print Network [OSTI]

    and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. Modelling Concentrating Solar Power with Thermal Energy Storage for Integration Studies Marissa Hummon 3rd International Solar Power Integration on the hourly and daily supply of solar energy. To optimize the use of this limited energy, CSP-TES must

  5. Proceedings of Eurosun 2004, published by PSE GmbH, Freiburg, Germany, pp. (3) 916-920, 2004 HelioClim: a long-term database on solar radiation for

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Clim: a long-term database on solar radiation for Europe and Africa S. Cros, M. Albuisson, M. Lefèvre, C-series of solar radiation data. Daily irradiation values are available over Europe, Africa and Atlantic Ocean stations only. INTRODUCTION Time series of solar radiation at ground level open the way to many

  6. Estimation of height-dependent solar irradiation and application to the solar climate of Iran

    SciTech Connect (OSTI)

    Samimi, J. (Sharif Univ of Technology, Tehran (Iran, Islamic Republic of))

    1994-05-01T23:59:59.000Z

    An explicitly height-dependent model has been used to estimate the solar irradiation over Iran which has a vast range of altitudes. The parameters of the model have been chosen on general grounds and not by parameters best fitting to any of the available measured irradiation data in Iran. The estimated global solar irradiation on the horizontal surface shows a very good agreement (4.1% deviation) with the 17-year long pyranometric measurements in Tehran, and also, is in good agreement with other, shorter available measured data. The entire data base of the Iranian meteorological stations have been used to establish a simple relation between the sunshine duration records and the cloud cover reports which can be utilized in solar energy estimations for sites with no sunshine duration recorders. Clear sky maps of Iran for direct solar irradiation on tracking, horizontal, and south-facing vertical planes are presented. The global solar irradiation map for horizontal surface with cloudiness is zoned into four irradiation zones. In about four-fifths of the land in Iran, the annual-mean daily global solar irradiation on horizontal surface ranges from 4.5 to 5.4 kWh/m[sup 2].

  7. ENERGIA SOLAR Introduccio

    E-Print Network [OSTI]

    Batiste, Oriol

    ENERGIA SOLAR · Introducci´o · Usos t`ermics. Baixa temperatura · Sistemes de conversi´o t) Cuines Solars http://www.solarcooking.org #12;DESSALADORS SOLARS #12;APLICACIONS T`ERMIQUES BAIXA TEMPERATURA Col.lectors solars plans per a ACS #12;CONVERSI´O DIRECTA EN ELECTRICITAT C`el.lules i panells

  8. SOLAR ENERGY Andrew Blakers

    E-Print Network [OSTI]

    and conversion methods usually entail few environmental problems. Solar energy includes both direct radiationSOLAR ENERGY Andrew Blakers Director, Centre for Sustainable Energy Systems Australian National Solar energy is special. It is vast, ubiquitous and indefinitely sustainable. The solar resource

  9. Solar Policy Environment: Houston

    Broader source: Energy.gov [DOE]

    The City of Houston is committed to achieving a sustainable solar infrastructure through strategic partnerships that address market barriers for solar energy through the Houston Solar Initiative. The initiative is dedicated to this long-term goal while focusing on near- and mid-term results that go beyond demonstration solar projects.

  10. Solar Policy Environment: Sacramento

    Broader source: Energy.gov [DOE]

    The City of Sacramento and the greater Sacramento region is the home of a long standing history of commitment to solar. Sacramento Solar Access seeks to further widespread adoption of solar energy by addressing current market barriers and preparing, through design guidelines and education, the infrastructure that will optimize solar production in the future.

  11. Solar Policy Environment: Boston

    Broader source: Energy.gov [DOE]

    City of Bostons objective in creating Solar Boston is to maximize solar technologys role in the Citys sustainable development, educational and emergency preparedness policies. Solar Bostons objective is the installation of solar technology on all feasible and appropriate locations throughout Boston.

  12. Solar powered desalination system

    E-Print Network [OSTI]

    Mateo, Tiffany Alisa

    2011-01-01T23:59:59.000Z

    USA, Jacksonville, FL Jacksonville Solar Energy Generation Facility Constructed Systems that produce electricity

  13. Comparison of Historical Satellite-Based Estimates of Solar Radiation Resources with Recent Rotating Shadowband Radiometer Measurements: Preprint

    SciTech Connect (OSTI)

    Myers, D. R.

    2009-03-01T23:59:59.000Z

    The availability of rotating shadow band radiometer measurement data at several new stations provides an opportunity to compare historical satellite-based estimates of solar resources with measurements. We compare mean monthly daily total (MMDT) solar radiation data from eight years of NSRDB and 22 years of NASA hourly global horizontal and direct beam solar estimates with measured data from three stations, collected after the end of the available resource estimates.

  14. Prospects for Photovoltaics in Sunny and Arid Regions: A Solar Grand Plan for Chile

    E-Print Network [OSTI]

    people17 million people GDP per capita $16,000 LCOE 3-56 ¢/kWh SIC Typical Daily LoadSING Typical Daily National Laboratory, 3Fundación Chile, 4University of Antofagasta, 5Solar Energy Research Center (SERC,000-40,000 2,000-14,000 2,000-21,000 302 323 442 Installed capacity of renewable energies 1236 [MW] Potential

  15. Solar Policy Environment: Pittsburgh

    Broader source: Energy.gov [DOE]

    In this project, Pittsburgh plans to build on its reputation as a national leader in green practices. Its Solar America Cities project will develop a distributed approach to adoption of solar energy technologies. Pittsburghs partnership includes universities, non-profit organizations, and business, labor and foundation communities. The city plans to transform the solar energy market and stimulate early adoption of solar technology, to show that solar technology works in a northern city.

  16. Boston Massachusetts: Solar in Action (Brochure), Solar America...

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

    Initiative) Solar installation goal: 25 megawatts (MW) cumulative installed solar capacity in the city by 2015 The reinvigorated Solar Boston Partnership builds on the work of...

  17. Salt Lake City, Utah: Solar in Action (Brochure), Solar America...

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

    a lack of understanding about solar contributed to preventing the widespread adoption of solar energy in all markets. Salt Lake City's prior solar successes with support from...

  18. San Francisco, California: Solar in Action (Brochure), Solar...

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

    San Francisco, California: Solar in Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) San Francisco, California: Solar in Action (Brochure),...

  19. Portland, Oregon: Solar in Action (Brochure), Solar America Cities...

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

    Action (Brochure), Solar America Cities, Energy Efficiency & Renewable Energy (EERE) San Francisco, California: Solar in Action (Brochure), Solar America Cities, Energy Efficiency...

  20. Solar Impulsive Energetic Electron Events

    E-Print Network [OSTI]

    Wang, Linghua

    2009-01-01T23:59:59.000Z

    coronal mass ejections and solar energetic proton events, J.Voyager observations of solar wind proton temperature:1- 10Howard (2004), Variability of solar eruptions during cycle

  1. 2008 Solar Technologies Market Report

    E-Print Network [OSTI]

    Price, S.

    2010-01-01T23:59:59.000Z

    96 4.3.2 Customer Solar Leasefinancing, customer solar lease financing, property-assessedagreement (PPA), the solar lease, and property-assessed

  2. 2008 Solar Technologies Market Report

    E-Print Network [OSTI]

    Price, S.

    2010-01-01T23:59:59.000Z

    Commission launched the California Solar Initiative (CSI), aenergy bond California Solar Initiative concentrating solarprograms, such as the California Solar Initiative (CSI) and

  3. Solar Easements and Rights Laws

    Broader source: Energy.gov [DOE]

    Solar access provisions in the General Laws of Massachusetts allow for the creation of voluntary solar easements to protect solar exposure and authorizes zoning rules that prohibit unreasonable...

  4. Utah Solar Outlook March 2010

    Broader source: Energy.gov [DOE]

    This presentation provides an overview of Utah's solar market, policy initiatives, and progress to date on the Solar America Cities Project: Solar Salt Lake.

  5. EA-1784: Fotowatio Nevada Solar, LLC's Apex Solar Power Project...

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

    84: Fotowatio Nevada Solar, LLC's Apex Solar Power Project in Clark County, NV EA-1784: Fotowatio Nevada Solar, LLC's Apex Solar Power Project in Clark County, NV July 1, 2010...

  6. EIS-0454: Tonopah Solar Energy Crescent Dunes Solar Energy Project...

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

    EIS-0454: Tonopah Solar Energy Crescent Dunes Solar Energy Project in Nye County, NV EIS-0454: Tonopah Solar Energy Crescent Dunes Solar Energy Project in Nye County, NV Documents...

  7. Daily HMS Extremes in Met Data - Hanford Site

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed Newcatalyst phases onOrganizationElectronic2005-2007 BudgetFlight Planning andDaily

  8. Property:DailyOpWaterUseConsumed | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoadingPenobscot County, Maine:Plug PowerAddress JumpFloorAreaTotalDailyOpWaterUseConsumed Jump

  9. Property:DailyOpWaterUseGross | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy ResourcesLoadingPenobscot County, Maine:Plug PowerAddress JumpFloorAreaTotalDailyOpWaterUseConsumed

  10. Concentrating Solar Power: Best Practices Handbook for the Collection and Use of Solar Resource Data (CSP)

    SciTech Connect (OSTI)

    Stoffel, T.; Renne, D.; Myers, D.; Wilcox, S.; Sengupta, M.; George, R.; Turchi, C.

    2010-09-01T23:59:59.000Z

    As the world looks for low-carbon sources of energy, solar power stands out as the most abundant energy resource. Harnessing this energy is the challenge for this century. Photovoltaics and concentrating solar power (CSP) are two primary forms of electricity generation using sunlight. These use different technologies, collect different fractions of the solar resource, and have different siting and production capabilities. Although PV systems are most often deployed as distributed generation sources, CSP systems favor large, centrally located systems. Accordingly, large CSP systems require a substantial investment, sometimes exceeding $1 billion in construction costs. Before such a project is undertaken, the best possible information about the quality and reliability of the fuel source must be made available. That is, project developers need to have reliable data about the solar resource available at specific locations to predict the daily and annual performance of a proposed CSP plant. Without these data, no financial analysis is possible. This handbook presents detailed information about solar resource data and the resulting data products needed for each stage of the project.

  11. Introduction Unlike most objects studied in astrophysics, the Sun has a considerable influence on our daily

    E-Print Network [OSTI]

    Schou, Jesper

    and the health of satellites. It even appears that a major power outage in Canada was due to the effects of solar to variations in the solar energy output. Solar activity is believed to be closely related to the solar rotation, this is far from the case. One of the most obvious solar changes to affect us is the variation in the number

  12. Rooftop Solar Potential Distributed Solar Power in NW

    E-Print Network [OSTI]

    1 Rooftop Solar Potential Distributed Solar Power in NW Massoud Jourabchi June 2013 1 Renewables;3 Regional Growth In Solar Energy Consumption Solar consumption both Thermal and PV h b t d i i lhas been on steady increase since early 1990s. From 2000-2010 Solar PV grow at annual rate of 13% and solar thermal

  13. BIG BEAR SOLAR OBSERVATORY CENTER FOR SOLAR-TERRESTRIAL RESEARCH

    E-Print Network [OSTI]

    BIG BEAR SOLAR OBSERVATORY CENTER FOR SOLAR-TERRESTRIAL RESEARCH Faculty Position in Solar Physics, New Jersey Institute of Technology A tenure track faculty position in solar physics is available of NJIT's program in solar physics, visit http://solar.njit.edu. Applicants are required to have a Ph

  14. Solar Decathlon | Department of Energy

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

    Solar Decathlon Solar Decathlon In the video above, Lakiya Culley talks about how her solar-powered, passive home, which was donated to Habitat for Humanity by a Solar Decathlon...

  15. Plasmonic conversion of solar energy

    E-Print Network [OSTI]

    Clavero, Cesar

    2014-01-01T23:59:59.000Z

    Basic Research Needs for Solar Energy Utilization, BasicS. Pillai and M. A. Green, Solar Energy Materials and SolarPlasmonic conversion of solar energy Csar Clavero Plasma

  16. Pacific Northwest Solar Radiation Data

    E-Print Network [OSTI]

    Oregon, University of

    Pacific Northwest Solar Radiation Data UO SOLAR MONITORING LAB Physics Department -- Solar Energy Center 1274 University of Oregon Eugene, Oregon 97403-1274 April 1, 1999 #12;Hourly solar radiation data

  17. Solar Resource Assessment

    SciTech Connect (OSTI)

    Renne, D.; George, R.; Wilcox, S.; Stoffel, T.; Myers, D.; Heimiller, D.

    2008-02-01T23:59:59.000Z

    This report covers the solar resource assessment aspects of the Renewable Systems Interconnection study. The status of solar resource assessment in the United States is described, and summaries of the availability of modeled data sets are provided.

  18. Solar | Department of Energy

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

    a solar energy system on a Habitat for Humanity home. GRID installed solar electric systems on 10 affordable homes developed by Habitat for Humanity in the Ivy City neighborhood...

  19. Solar Construction Permitting Standards

    Broader source: Energy.gov [DOE]

    Owners of solar photovoltaic (PV) systems and solar water heating systems in Arizona are required to obtain a building permit before their systems may be installed. Permits are handled at the...

  20. Solar Construction Permitting Standards

    Broader source: Energy.gov [DOE]

    Owners of solar photovoltaic (PV) systems and solar water heating systems in Colorado are required to obtain a building permit before their systems may be installed. Permits are handled at the...

  1. Solar Thermoelectric Energy Conversion

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

    SOLID-STATE SOLAR-THERMAL ENERGY CONVERSION CENTER NanoEngineering Group Solar Thermoelectric Energy Conversion Gang Chen, 1 Daniel Kraemer, 1 Bed Poudel, 2 Hsien-Ping Feng, 1 J....

  2. Solar Equipment Certification

    Broader source: Energy.gov [DOE]

    Minnesota law requires that all active solar space-heating and water-heating systems, sold, offered for sale, or installed on residential and commercial buildings in the state meet Solar Rating and...

  3. Solar Contractor Licensing

    Broader source: Energy.gov [DOE]

    Until 1994, Florida offered limited specialty licenses for residential solar hot water and pool heating, as well a general solar contractor's license. These specialty licenses have not been issued...

  4. Solar Contractor Licensing

    Broader source: Energy.gov [DOE]

    The Arizona Registrar of Contractors does not offer a general solar electric contractor license, but the state's C-11/L-11 electrical license covers solar electric installations. C-11 licenses are...

  5. CT Solar Loan

    Broader source: Energy.gov [DOE]

    The Clean Energy Finance and Investment Authority is offering a pilot loan program, CT Solar Loan, to provide homeowners with 15-year loans for solar PV equipment. The loans are administered...

  6. CALIFORNIA SOLAR DATA MANUAL

    E-Print Network [OSTI]

    Berdahl, P.

    2010-01-01T23:59:59.000Z

    SOLA DATA MANUAL Jan Paul Berdahl, Donald Grether, Marlo Martin, and Michael Wahlig ronment Division Solar Energy

  7. Your Community With Solar

    E-Print Network [OSTI]

    Powering Your Community With Solar: Overcoming Market and Implementation Barriers Lessons from successful Solarize campaigns help communities seize volume discounts through collective purchasing The first Solarize program began in Portland, Oregon, as a grassroots campaign for collective SunShot will work

  8. Cool Earth Solar

    SciTech Connect (OSTI)

    Lamkin, Rob; McIlroy, Andy; Swalwell, Eric; Rajan, Kish

    2013-04-22T23:59:59.000Z

    In a public-private partnership that takes full advantage of the Livermore Valley Open Campus (LVOC) for the first time, Sandia National Laboratories and Cool Earth Solar have signed an agreement that could make solar energy more affordable and accessible. In this piece, representatives from Sandia, Cool Earth Solar, and leaders in California government all discuss the unique partnership and its expected impact.

  9. Solar Policy Environment: Tucson

    Broader source: Energy.gov [DOE]

    The Tucson Solar Initiative seeks to institutionalize the value of nine years of solar energy development experience, secure the promise of renewable energy investment funds, facilitate the installation of a significant volume of installations in the community and establish a mechanism for sustainable solar integration for the future.

  10. Standard Solar Model

    SciTech Connect (OSTI)

    Loong, Lim Yaw; Yusof, Norhasliza; Kassim, Hasan Abu [Physics Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur (Malaysia)

    2008-05-20T23:59:59.000Z

    Solar models are important in our understanding of stars and stellar evolution. Solar models have been constructed using different methods. In this work, a solar model will be built using the fitting method. The model will incorporate the most recent input data. The model will be evolved to the current epoch starting from the zero-age main sequence model.

  11. Solar Policy Environment: Milwaukee

    Broader source: Energy.gov [DOE]

    The City of Milwaukees SAC Initiative, Milwaukee Shines, works to reduce informational, economic and procedural barriers to the widespread adoption of solar energy systems. While the City of Milwaukee and its partners have demonstrated commitment and experience in implementing solar technologies, Milwaukee Shines aims to enhance these efforts and make solar a viable alternative throughout the region.

  12. Digital Solar Explorer Introduction

    E-Print Network [OSTI]

    Zanibbi, Richard

    Digital Solar Explorer Introduction Description Content Design Physical Interaction An element of interactivity is added to the Digital Solar Explorer exhibit through the use of a controller. Simple, intuitive the learning process, which is the number one goal of the Digital Solar Explorer exhibit. Essentially, the user

  13. Cool Earth Solar

    ScienceCinema (OSTI)

    Lamkin, Rob; McIlroy, Andy; Swalwell, Eric; Rajan, Kish

    2014-02-26T23:59:59.000Z

    In a public-private partnership that takes full advantage of the Livermore Valley Open Campus (LVOC) for the first time, Sandia National Laboratories and Cool Earth Solar have signed an agreement that could make solar energy more affordable and accessible. In this piece, representatives from Sandia, Cool Earth Solar, and leaders in California government all discuss the unique partnership and its expected impact.

  14. 7Name ________________________________ Solar Electricity.

    E-Print Network [OSTI]

    be attached directly to the outer surface of a satellite, or can be found on `solar panels' that the satellite. If the satellite is not big enough, additional solar panels may be needed to supply the electricity) The solar cells produce 0.03 watts per square cm, so the power available is 39819 x 0.03 = 1194 watts

  15. SOLAR ENERGY POTENTIALS

    E-Print Network [OSTI]

    Loreta N. Gashi; Sabedin A. Meha; Besnik A. Duriqi; Fatos S. Haxhimusa

    In recent years solar energy has experienced phenomenal growth due to the technological improvements resulting in cost reductions and also governments policies supportive of renewable energy development and utilization. In this paper we will present possibilities for development and deployment of solar energy. We will use Kosovo to compare the existing power production potential and future possible potential by using solar energy.

  16. Solar forecasting review

    E-Print Network [OSTI]

    Inman, Richard Headen

    2012-01-01T23:59:59.000Z

    Quantifying PV power output variability, Solar Energy, vol.each solar sen at node i, P(t) the total power output of theSolar Forecasting Historically, traditional power generation technologies such as fossil and nu- clear power which were designed to run in stable output

  17. Conservation and solar guidelines

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1983-01-01T23:59:59.000Z

    Guidelines are given for selecting R-values and infiltration levels, and determining the size of the solar collection area for passive solar buildings. The guidelines are based on balancing the incremental cost/benefit of conservation and passive solar strategies. Tables are given for 90 cities in the US and the results are also displayed on maps. An example is included.

  18. Tips for Daylighting with Windows

    SciTech Connect (OSTI)

    Robinson, Alastair; Selkowitz, Stephen

    2013-10-01T23:59:59.000Z

    These guidelines provide an integrated approach to the cost-effective design of perimeter zones in new commercial buildings and existing building retrofits. They function as a quick reference for building designers, through a set of easy steps and rules-of-thumb, emphasizing how-to practical details. References are given to more detailed sources of information, should the reader wish to go further. The design method used in this document emphasizes that building decisions should be made within the context of the whole building as a single functioning system rather than as an assembly of distinct parts. This integrated design approach looks at the ramifications of each individual system decision on the whole building. For example, the decision on glazing selection will have an effect on lighting, mechanical systems, and interior design. Therefore, the entire design team should participate and influence this glazing decisionwhich typically rests with the architect alone. The benefit of an integrated design approach is a greater chance of success towards long-term comfort and sustained energy savings in the building.

  19. Daylight metrics and energy savings

    E-Print Network [OSTI]

    Mardaljevic, John

    2011-01-01T23:59:59.000Z

    Mardaljevic and A. Nabil. Electrochromic glazing and facadeoptimiza- tion of electrochromic operations for occupantmodulating materials (e.g. electrochromic glazing), blinds,

  20. DAYLIGHTING DIRECTORY 1/1980

    E-Print Network [OSTI]

    ,

    2012-01-01T23:59:59.000Z

    of computerized energy trade off studies of AVAILABILITYDES IG:-1 ~1ETHODS 2. Energy trade off analysis of north

  1. Daylight metrics and energy savings

    E-Print Network [OSTI]

    Mardaljevic, John

    2011-01-01T23:59:59.000Z

    with various performance indicators becomes ever moreextent that such performance indicators are crude, or the

  2. Daylight metrics and energy savings

    E-Print Network [OSTI]

    Mardaljevic, John

    2011-01-01T23:59:59.000Z

    towards sustainable, low-energy buildings has increased thetowards sustainable, low-energy buildings places increasing

  3. Natural Daylighting - An Energy Analysis

    E-Print Network [OSTI]

    Jarrell, R. P.

    1987-01-01T23:59:59.000Z

    in the final design, as a percentage of the building enclosure within a typical 25 foot wide office bay, is approximately 39 percent. The glass on the north and south elevations is shaded by a brick spandrel which projects 18 inches. East-west facing... glass is shaded by a 15 inch brick spandrel. Projecting brick col umns he1 p to shade the glass with north-south pro- jections of 20 inches and east-west pro- jections of 34 inches. The glazing selected is a one-inch insulated, bronze tinted glass...

  4. OpenEI Community - daylight

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth'sOklahoma/Geothermal < Oklahomast, 2012Coast

  5. Nanolens Window Coatings for Daylighting

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F S i DOEToward aInnovationHydrogenNRGA C T Sof

  6. Petrovay: Solar physics Solar wind and heliosphere THE SOLAR WIND AND THE HELIOSPHERE

    E-Print Network [OSTI]

    Petrovay, Kristóf

    with high first ionization potential are underrepresented in solar wind. Probable cause: ambipolar diffusion: Solar physics Solar wind and heliosphere Potential explanation: belt due to higher pressurePetrovay: Solar physics Solar wind and heliosphere THE SOLAR WIND AND THE HELIOSPHERE 1951: First

  7. Magnetohydrodynamics and Solar Physics

    E-Print Network [OSTI]

    Rieutord, Michel

    2014-01-01T23:59:59.000Z

    In this short review, I present some of the recent progresses on the pending questions of solar physics. These questions let us revisit the solar wind, the solar dynamo problem, the dynamics of the photosphere and finally have a glimpse at other solar type stars. Discussing the use of direct numerical simulations in solar physics, I show that the full numerical calculation of the flow in a single supergranule would require more electric power than the luminosity of the sun itself with present computer technology.

  8. Photovoltaic solar concentrator

    DOE Patents [OSTI]

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

    2012-12-11T23:59:59.000Z

    A photovoltaic solar concentrator is disclosed with one or more transverse-junction solar cells (also termed point contact solar cells) and a lens located above each solar cell to concentrate sunlight onto the solar cell to generate electricity. Piezoelectric actuators tilt or translate each lens to track the sun using a feedback-control circuit which senses the electricity generated by one or more of the solar cells. The piezoelectric actuators can be coupled through a displacement-multiplier linkage to provide an increased range of movement of each lens. Each lens in the solar concentrator can be supported on a frame (also termed a tilt plate) having three legs, with the movement of the legs being controlled by the piezoelectric actuators.

  9. California Solar Initiative- Solar Thermal Program

    Broader source: Energy.gov [DOE]

    '''''Note: This program was modified by AB 2249, signed in September 2012. The bill allows for non-residential solar pool heating to qualify for incentives, and requires program administrators to...

  10. Homebuyer Solar Option and Solar Offset Program

    Broader source: Energy.gov [DOE]

    [http://www.energy.ca.gov/2009-SOPR-1/documents/sb_1_bill_20060821_chapte... Senate Bill 1 of 2006], which established the statewide California Solar Initiative, also required the California Energy...

  11. Renewable Energy Ready Home Solar Photovoltaic Specifications...

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

    Renewable Energy Ready Home Solar Photovoltaic Specifications Renewable Energy Ready Home Solar Photovoltaic Specifications Solar Photovoltaic Specification, Checklist and Guide,...

  12. Solar Thermoelectric Energy Conversion | Department of Energy

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

    Solar Thermoelectric Energy Conversion Solar Thermoelectric Energy Conversion Efficiencies of different types of solar thermoelectric generators were predicted using theoretical...

  13. Helioseismology and Solar Abundances

    E-Print Network [OSTI]

    Sarbani Basu; H. M. Antia

    2007-11-28T23:59:59.000Z

    Helioseismology has allowed us to study the structure of the Sun in unprecedented detail. One of the triumphs of the theory of stellar evolution was that helioseismic studies had shown that the structure of solar models is very similar to that of the Sun. However, this agreement has been spoiled by recent revisions of the solar heavy-element abundances. Heavy element abundances determine the opacity of the stellar material and hence, are an important input to stellar model calculations. The models with the new, low abundances do not satisfy helioseismic constraints. We review here how heavy-element abundances affect solar models, how these models are tested with helioseismology, and the impact of the new abundances on standard solar models. We also discuss the attempts made to improve the agreement of the low-abundance models with the Sun and discuss how helioseismology is being used to determine the solar heavy-element abundance. A review of current literature shows that attempts to improve agreement between solar models with low heavy-element abundances and seismic inference have been unsuccessful so far. The low-metallicity models that have the least disagreement with seismic data require changing all input physics to stellar models beyond their acceptable ranges. Seismic determinations of the solar heavy-element abundance yield results that are consistent with the older, higher values of the solar abundance, and hence, no major changes to the inputs to solar models are required to make higher-metallicity solar models consistent with helioseismic data.

  14. Petrovay: Solar physics The solar cycle ACTIVE REGIONS

    E-Print Network [OSTI]

    Petrovay, Kristóf

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

  15. Rooftop Solar Potential Distributed Solar Power in NW

    E-Print Network [OSTI]

    6/19/2013 1 Rooftop Solar Potential Distributed Solar Power in NW Massoud Jourabchi June 2013 1 in 2012 4 #12;6/19/2013 3 Regional Growth In Solar Energy Consumption Solar consumption both Thermal and PV h b t d i i lhas been on steady increase since early 1990s. From 2000-2010 Solar PV grow

  16. Connectable solar air collectors Solar Energy Centre Denmark

    E-Print Network [OSTI]

    Connectable solar air collectors Solar Energy Centre Denmark Danish Technological Institute SEC-R-22 #12;Connectable solar air collectors Søren ?stergaard Jensen Miroslav Bosanac Solar Energy Centre Søren ?stergaard Jensen and Miroslav Bosanac Solar Energy Centre, Danish Technological Institute

  17. Connectable solar air collectors Solar Energy Centre Denmark

    E-Print Network [OSTI]

    Connectable solar air collectors Solar Energy Centre Denmark Danish Technological Institute SEC-R-22 #12;Connectable solar air collectors Søren ?stergaard Jensen Miroslav Bosanac Solar Energy Centre for renewable energy of the Danish Energy Agency. The project group behind the project was: Solar Energy Centre

  18. PowerPoint Presentation

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

    Institute of Building Research (Shenzhen) * Singyes Solar (Tongji) * SOLATUBE Daylight Technology, CECEP (Suzhou) * Telchina (Beijing) * Tongguang Construction Group...

  19. Building Energy Information Systems: User Case Studies

    E-Print Network [OSTI]

    Granderson, Jessica

    2010-01-01T23:59:59.000Z

    Solutions Virtual Environment models, because of the ability to run computational fluid dynamics, solar thermal, and daylighting

  20. SELECTIVE ABSORBER COATED FOILS FOR SOLAR COLLECTORS

    E-Print Network [OSTI]

    Lampert, Carl M.

    2013-01-01T23:59:59.000Z

    fabrication of solar collector panels. adhesives and bondingdirectly to solar collector panels. the solar selectivefabrication of solar collector panels. However, the finish

  1. ANALYSIS OF THE CALIFORNIA SOLAR RESOURCE

    E-Print Network [OSTI]

    Berdahl, P.

    2011-01-01T23:59:59.000Z

    NEEDS FOR SOLAR RADIATION DATA SUMMARY AND DESCRIPTION OFSOURCES OF SOLAR RADIATION DATA CALI FORN IA SOLAR DATA MANNEED FOR SOLAR RADIATION DATA - Made direct contacts with

  2. ECOLOGICAL CONSIDERATIONS OF THE SOLAR ALTERNATIVE

    E-Print Network [OSTI]

    Davidson, M.

    2010-01-01T23:59:59.000Z

    et al. , April 1975. 4. Solar Thermal Conversion Missionof.Several Central Reveiver Solar Thermal Power Plant Designterm solar energy are: Included solar thermal conversion to

  3. Solar opacities constrained by solar neutrinos and solar oscillations

    SciTech Connect (OSTI)

    Cox, A.N.

    1989-08-15T23:59:59.000Z

    This review discusses the current situation for opacities at the solar center, the solar surface, and for the few million kelvin temperatures that occur below the convection zone. The solar center conditions are important because they are crucial for the neutrino production, which continues to be predicted about 4 times that observed. The main extinction effects there are free-free photon absorption in the electric fields of the hydrogen, helium and the CNO atoms, free electron scattering of photons, and the bound-free and bound-bound absorption of photons by iron atoms with two electrons in the 1s bound level. An assumption that the iron is condensed-out below the convection zone, and the opacity in the central regions is thereby reduced, results in about a 25 percent reduction in the central opacity but only a 5 percent reduction at the base of the convection zone. Furthermore, the p-mode solar oscillations are changed with this assumption, and do not fit the observed ones as well as for standard models. A discussion of the large effective opacity reduction by weakly interacting massive particles also results in poor agreement with observed p-mode oscillation frequencies. The much larger opacities for the solar surface layers from the Los Alamos Astrophysical Opacity Library instead of the widely used Cox and Tabor values show small improvements in oscillation frequency predictions, but the largest effect is in the discussion of p-mode stability. Solar oscillation frequencies can serve as an opacity experiment for the temperatures and densities, respectively, of a few million kelvin and between 0.1 and 10 g/cm/sup 3/. Current oscillation frequency calculations indicate that possibly the Opacity Library values need an increase of typically 15 percent just at the bottom of the convection zone at 3 /times/ 10/sup 6/K. 41 refs., 15 figs., 1 tab.

  4. The Solar Argon Abundance

    E-Print Network [OSTI]

    Katharina Lodders

    2007-10-24T23:59:59.000Z

    The solar argon abundance cannot be directly derived by spectroscopic observations of the solar photosphere. The solar Ar abundance is evaluated from solar wind measurements, nucleosynthetic arguments, observations of B stars, HII regions, planetary nebulae, and noble gas abundances measured in Jupiter's atmosphere. These data lead to a recommended argon abundance of N(Ar) = 91,200(+/-)23,700 (on a scale where Si = 10^6 atoms). The recommended abundance for the solar photosphere (on a scale where log N(H) = 12) is A(Ar)photo = 6.50(+/-)0.10, and taking element settling into account, the solar system (protosolar) abundance is A(Ar)solsys = 6.57(+/-)0.10.

  5. Solar Chemical Peculiarities?

    E-Print Network [OSTI]

    Carlos Allende Prieto

    2006-12-08T23:59:59.000Z

    Several investigations of FGK stars in the solar neighborhood have suggested that thin-disk stars with an iron abundance similar to the Sun appear to show higher abundances of other elements, such as silicon, titanium, or nickel. Offsets could arise if the samples contain stars with ages, mean galactocentric distances, or kinematics, that differ on average from the solar values. They could also arise due to systematic errors in the abundance determinations, if the samples contain stars that are different from the Sun regarding their atmospheric parameters. We re-examine this issue by studying a sample of 80 nearby stars with solar-like colors and luminosities. Among these solar "analogs", the objects with solar iron abundances exhibit solar abundances of carbon, silicon, calcium, titanium and nickel.

  6. Solar Decathlon 2005

    SciTech Connect (OSTI)

    Warner, C.; Nahan, R.; King, R.

    2005-01-01T23:59:59.000Z

    Solar Decathlon 2005 is a U.S. Department of Energy and National Renewable Energy Laboratory competition involving 19 colleges and universities from the United States, Canada, and Spain. These teams will compete to design, build, and demonstrate solar homes. In fall 2005, teams will transport their competition solar houses to Washington, D.C., where they will construct a solar village on the National Mall. When the houses are assembled, the teams will compete against each other in 10 contests (hence, a decathlon) for about a week. The contests range from design to comfort to energy performance. Each team must provide an aesthetically pleasing entry that produces sufficient solar energy for space conditioning, hot water, lighting, appliances, and an electric car. The Solar Decathlon is co-sponsored by BP, The Home Depot, the American Institute of Architects, the National Association of Home Builders, and the DIY Network. For more information, visit the Web site at www.solardecathlon.org.

  7. Solar thermal aircraft

    DOE Patents [OSTI]

    Bennett, Charles L. (Livermore, CA)

    2007-09-18T23:59:59.000Z

    A solar thermal powered aircraft powered by heat energy from the sun. A heat engine, such as a Stirling engine, is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller. The heat engine has a thermal battery in thermal contact with it so that heat is supplied from the thermal battery. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

  8. Solar Policy Environment: Philadelphia

    Broader source: Energy.gov [DOE]

    The project will identify promising locations for photovoltaic installations and create a roadmap for commercial and residential system developers. The roadmap, published as the Solar Developers Guide to Philadelphia, will be used to promote and attract solar energy investment. Philadelphias long-term goal for solar energy is to fully utilize the potential of solar energy to safely, reliably, and cost-effectively displace the use of energy generated by fossil fuels. To achieve its solar energy goals, the City of Philadelphia must add large commercial scale (> 500 kW) solar installations to its ongoing efforts on the smaller scale (we note that a new 1 MW PV installation will be installed at the Philadelphia Navy Yard by the end of 2008).

  9. Ashland, Orgen's solar strategy

    SciTech Connect (OSTI)

    Fegonese, J.A.

    1981-01-01T23:59:59.000Z

    The conceptualization, implementation, and experiences of a small southern Oregon community in attempting to increase the energy efficiency of new residential developments is outlined. The two main ordinances used are (1) a city-wide solar access ordinance, which establishes a special solar setback in the city, and (2) a new development code for housing, which provides for powerful incentives for passive solar housing. Successes and insights gained from the experience are discussed.

  10. for doubling solar panel

    E-Print Network [OSTI]

    An outline for doubling solar panel efficiency C o l o ra do S c ho o l of M i ne s Ma g a z i ne Take a look at a solar panel on a sunny Colorado day and, if you're like most people, you won't see physics professor and solar energy researcher, who admits to checking out his panels and their energy

  11. Solar Policy Environment: Seattle

    Broader source: Energy.gov [DOE]

    The objective of the Emerald City Solar Initiative is to overcome the barriers to widespread deployment of solar energy technology, dramatically increasing residential, commercial, City-owned, and community-scale solar energy use. The City has assembled a strong team of partners that have proven track records in the fields of public planning, renewable energy resource mapping, financial analysis, site analysis, education and outreach, policy analysis and advocacy, community organizing and renewable energy project development.

  12. Heterojunction solar cell

    DOE Patents [OSTI]

    Olson, J.M.

    1994-08-30T23:59:59.000Z

    A high-efficiency single heterojunction solar cell is described wherein a thin emitter layer (preferably Ga[sub 0.52]In[sub 0.48]P) forms a heterojunction with a GaAs absorber layer. The conversion efficiency of the solar cell is at least 25.7%. The solar cell preferably includes a passivating layer between the substrate and the absorber layer. An anti-reflection coating is preferably disposed over the emitter layer. 1 fig.

  13. Solar radiation intensity calculations

    E-Print Network [OSTI]

    Levine, Randolph Steven

    1978-01-01T23:59:59.000Z

    SOLAR RADIATION INTENSITY CALCULATIONS A Thesis by RANDOLPH STEVEN LEVINE Submitted to the Graduate College of Texas A&M University in partia'l fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1978 Major Subject...: Physics SOLAR RADIATION INTENSITY CALCULATIONS A Thesis by RANDOLPH STEVEN LEVINE Approved as to style and content by: (Chairman of Committee) (Member) (Member) ( member) (Head of Department) December 1978 f219 037 ABSTRACT Solar Radiation...

  14. Solar selective absorption coatings

    DOE Patents [OSTI]

    Mahoney, Alan R. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM); Ashley, Carol S. (Albuquerque, NM); Martinez, F. Edward (Horseheads, NY)

    2003-10-14T23:59:59.000Z

    A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.

  15. Solar selective absorption coatings

    DOE Patents [OSTI]

    Mahoney, Alan R. (Albuquerque, NM); Reed, Scott T. (Albuquerque, NM); Ashley, Carol S. (Albuquerque, NM); Martinez, F. Edward (Horseheads, NY)

    2004-08-31T23:59:59.000Z

    A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.

  16. Conservation and solar guidelines

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1986-01-01T23:59:59.000Z

    Guidelines are given for selecting R-values and infiltration levels, and determining the size of the solar collection area for passive solar buildings. The guidelines are based on balancing the incremental cost/benefit of conservation and passive solar strategies. Tables are given for 90 cities in the United States and the results are also displayed on maps. The procedures are developed in an appendix, which gives the cost assumptions used and explains how to develop different guidelines for different costs.

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

    E-Print Network [OSTI]

    A. G. Tlatov

    2007-06-12T23:59:59.000Z

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

  18. Solar Power Purchase Agreements

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

    Solar Power Purchase Agreements Brian Millberg | Energy Manager, City of Minneapolis Direct Ownership * Financial: Even at 3kW installed cost, simple payback is 18 years (initial...

  19. Solar Heating in Uppsala.

    E-Print Network [OSTI]

    Blomqvist, Emelie; Hger, Klara

    2012-01-01T23:59:59.000Z

    ?? The housing corporation Uppsalahem has installed asolar heating system in the neighbourhood Haubitsen,which was renovated in 2011. This report examineshow much energy the solar (more)

  20. Concentrated Solar Thermoelectric Power

    Broader source: Energy.gov [DOE]

    This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 2325, 2013 near Phoenix, Arizona.

  1. Long Island Solar Farm

    SciTech Connect (OSTI)

    Anders, R.

    2013-05-01T23:59:59.000Z

    The Long Island Solar Farm (LISF) is a remarkable success story, whereby very different interest groups found a way to capitalize on unusual circumstances to develop a mutually beneficial source of renewable energy. The uniqueness of the circumstances that were necessary to develop the Long Island Solar Farm make it very difficult to replicate. The project is, however, an unparalleled resource for solar energy research, which will greatly inform large-scale PV solar development in the East. Lastly, the LISF is a superb model for the process by which the project developed and the innovation and leadership shown by the different players.

  2. Prison Solar Project

    Broader source: Energy.gov [DOE]

    Presentation covers the Prison Solar Project for the Federal Utility Partnership Working Group (FUPWG) meeting, held on November 18-19, 2009.

  3. Deed Restrictions for Solar

    Broader source: Energy.gov [DOE]

    This report summarizes the efforts made to address Task 3 - Examples of Residential Deed Restrictions Allowing Solar. The focus of the study is on communities surrounding Houston, Texas.

  4. Flexible Assembly Solar Technology

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

    2007-2010 BrightSource Energy, Inc. All rights reserved. 1 Flexible Assembly Solar Technology Binyamin Koretz Director, Strategic Planning & IP 2 Proprietary &...

  5. Passive solar design handbook

    SciTech Connect (OSTI)

    Jones, R.W.

    1981-01-01T23:59:59.000Z

    The Passive Solar Design Handbook, Volume Three updates Volume Two by presenting extensive new data on the optimum mix of conservation and solar direct gain, sunspaces, thermal storage walls, and solar radiation. The direct gain, thermal storage wall, and solar radiation data are greatly expanded relative to the Volume 2 coverage. The needed flexibility to analyze a variety of system designs is accommodated by the large number of reference designs to be encompassed - 94 in contrast to 6 in Volume two - and the large amount of sensitivity data for direct gain and sunspace systems - approximately 1100 separate curves.

  6. Solar energt focusing means

    SciTech Connect (OSTI)

    Tsubota, J.

    1981-11-10T23:59:59.000Z

    A highly efficient solar focusing means being hollow and in semi-cylindrical or arcuate shape, the surface has such fine menisci as to act like convex lenses to focus solar rays towards the center of the focusing body, irrespective of the position of the sun, where a solar energy conversion device is located and further acts to disperse light reflected thereonto from the solar energy conversion device. The focusing body can assume several shapes and thus can be used for roofing of a building, such as a house, or the like, and still be aesthetically pleasing.

  7. Solar Contractor Licensing

    Broader source: Energy.gov [DOE]

    Utah's Division of Occupational and Professional Licensing requires installers of solar energy systems to be licensed contractors. General electrical contractors carrying an S200 license are...

  8. Scattering Solar Thermal Concentrators

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

    is a rendering of a scattering solar concentrator. Light collected by a cylindrical Fresnel lens is focused within a curved glass "guide" sheet, where it is redirected into...

  9. The Solar Chimney

    E-Print Network [OSTI]

    scul

    2002-11-27T23:59:59.000Z

    Hot air for the solar chimney is produced by the greenhouse effect in a simple air collec- tor consisting only of a glass or plastic film covering stretched...

  10. Solar | Department of Energy

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

    Research Award Program work on. | Photo by Dennis Schroeder, National Renewable Energy Laboratory Shining Stars of Solar: Meet Three SunShot Postdoctoral Award Recipients...

  11. Solar | Department of Energy

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

    Soft costs now account for more than 60% of the total price of installing residential solar energy systems.

  12. Solar | Department of Energy

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

    collected and discuss what has happened in their stills. June 20, 2014 Photovoltaics and Solar Energy (2 Activities) This module addresses issues dealing with the energy from the...

  13. Solar Decathlon 2009 (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2009-04-01T23:59:59.000Z

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

  14. Washington County- Solar Ordinance

    Broader source: Energy.gov [DOE]

    Provides for zoning restrictions on solar energy systems, including (1) six foot setbacks; (2) 20 foot height limitations on freestanding systems; (3) limitations on square feet of freestanding...

  15. Solar and Wind Rights

    Broader source: Energy.gov [DOE]

    Illinois law prohibits homeowners' associations, common interest community associations and condominium unit owners' associations from preventing homeowners from using or installing solar energy...

  16. Passive solar space heating

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1980-01-01T23:59:59.000Z

    An overview of passive solar space heating is presented indicating trends in design, new developments, performance measures, analytical design aids, and monitored building results.

  17. HOUSEHOLD SOLAR POWER SYSTEM.

    E-Print Network [OSTI]

    Jiang, He

    2014-01-01T23:59:59.000Z

    ?? Photovoltaic power has become one of the most popular research area in new energy field. In this report, the case of household solar power (more)

  18. Community Solar Scenario Tool: Planning for a Fruitful Solar Garden

    Office of Energy Efficiency and Renewable Energy (EERE)

    As part of a Do-It-Yourself Solar Market Analysis summer series, NREL's Solar Technical Assistance Team (STAT) is presenting a live webinar titled, "Community Solar Scenario Tool: Planning for a...

  19. Solar Energy Materials & Solar Cells 91 (2007) 13881391 Bifacial configurations for CdTe solar cells

    E-Print Network [OSTI]

    Romeo, Alessandro

    Solar Energy Materials & Solar Cells 91 (2007) 1388­1391 Bifacial configurations for CdTe solar We present a different back contact for CdTe solar cell by the application of only a transparent that acts as a free-Cu stable back contact and at the same time allows to realize bifacial CdTe solar cells

  20. Solar Position Algorithm for Solar Radiation Applications (Revised...

    Office of Scientific and Technical Information (OSTI)

    Revised January 2008 * NRELTP-560-34302 Solar Position Algorithm for Solar Radiation Applications Ibrahim Reda and Afshin Andreas National Renewable Energy Laboratory 1617 Cole...