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


1

Solar: monthly and annual average global horizontal irradiance...  

Open Energy Info (EERE)

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Global Horizontal Irradiance
NASA Surface meteorology and Solar Energy (SSE) Release 6.0 Data Set (Jan 2008)
22-year Monthly & Annual Average...

2

Definition: Global horizontal irradiance | Open Energy Information  

Open Energy Info (EERE)

Normal Irradiance (DNI) and Diffuse Horizontal Irradiance (DIF).1 Related Terms DNI, Solar radiation, Concentrating solar power, Photovoltaics References http:...

3

Solar: monthly and annual average global horizontal irradiance GIS data at  

Open Energy Info (EERE)

irradiance GIS data at irradiance GIS data at one-degree resolution of the World from NASA/SSE Dataset Summary Description (Abstract): Global Horizontal IrradianceNASA Surface meteorology and Solar Energy (SSE) Release 6.0 Data Set (Jan 2008)22-year Monthly & Annual Average (July 1983 - June 2005) Parameter: Insolation Incident On A Horizontal Surface (kWh/m^2/day) Internet: http://eosweb.larc.nasa.gov/sse/ Note 1: SSE Methodology & Accuracy sections online Note 2: Lat/Lon values indicate the lower left corner of a 1x1 degree region. Negative values are south and west; positive values are north and east. Boundaries of the -90/-180 region are -90 to -89 (south) and -180 to -179 (west). The last region, 89/180, is bounded by 89 to 90 (north) and 179 to 180 (east). The mid-point of

4

global horizontal irradiance | OpenEI  

Open Energy Info (EERE)

horizontal irradiance horizontal irradiance Dataset Summary Description (Abstract): Global Horizontal IrradianceNASA Surface meteorology and Solar Energy (SSE) Release 6.0 Data Set (Jan 2008)22-year Monthly & Annual Average (July 1983 - June 2005) Parameter: Insolation Incident On A Horizontal Surface (kWh/m^2/day) Internet: http://eosweb.larc.nasa.gov/sse/ Note 1: SSE Methodology & Accuracy sections online Note 2: Lat/Lon values indicate the lower left corner of a 1x1 degree region. Negative values are south and west; Source U.S. National Aeronautics and Space Administration (NASA), Surface meteorology and Solar Energy (SSE) Date Released March 31st, 2009 (5 years ago) Date Updated April 01st, 2009 (5 years ago) Keywords GHI GIS global horizontal irradiance NASA solar

5

Simple Solar Spectral Model for Direct and Diffuse Irradiance on Horizontal and Tilted Planes at the Earth's Surface for Cloudless Atmospheres  

Science Conference Proceedings (OSTI)

In a previous work, we described a simple model for calculating direct normal and diffuse horizontal spectral solar irradiance for cloudless sky conditions. In this paper, we present a new simple model (SPCTRAL2) that incorporates improvements to ...

Richard E. Bird; Carol Riordan

1986-01-01T23:59:59.000Z

6

High accuracy diffuse horizontal irradiance measurements without a shadowband  

DOE Green Energy (OSTI)

The standard method for measuring diffuse horizontal irradiance uses a fixed shadowband to block direct solar radiation. This method requires a correction for the excess skylight blocked by the band, and this correction varies with sky conditions. Alternately, diffuse horizontal irradiance may be calculated from total horizontal and direct normal irradiance. This method is in error because of angular (cosine) response of the total horizontal pyranometer to direct beam irradiance. This paper describes an improved calculation of diffuse horizontal irradiance from total horizontal and direct normal irradiance using a predetermination of the angular response of the total horizontal pyranometer. We compare these diffuse horizontal irradiance calculations with measurements made with a shading-disk pyranometer that shields direct irradiance using a tracking disk. Results indicate significant improvement in most cases. Remaining disagreement most likely arises from undetected tracking errors and instrument leveling.

Schlemmer, J.A; Michalsky, J.J.

1995-12-31T23:59:59.000Z

7

Simple solar spectral model for direct and diffuse irradiance on horizontal and tilted planes at the earth's surface for cloudless atmospheres  

DOE Green Energy (OSTI)

A new, simple model for calculating clear-sky direct and diffuse spectral irradiance on horizontal and tilted surfaces is presented. The model is based on previously reported simple algorithms and on comparisons with rigorous radiative transfer calculations and limited outdoor measurements. Equations for direct normal irradiance are outlined; and include: Raleigh scattering; aerosol scattering and absorption; water vapor absorption; and ozone and uniformly mixed gas absorption. Inputs to the model include solar zenith angle, collector tilt angle, atmospheric turbidity, amount of ozone and precipitable water vapor, surface pressure, and ground albedo. The model calculates terrestrial spectra from 0.3 to 4.0 ..mu..m with approximately 10 nm resolution. A major goal of this work is to provide researchers with the capability to calculate spectral irradiance for different atmospheric conditions and different collector geometries using microcomputers. A listing of the computer program is provided.

Bird, R.; Riordan, C.

1984-12-01T23:59:59.000Z

8

Analyzing and simulating the variability of solar irradiance and solar PV powerplants  

E-Print Network (OSTI)

horizontal irradiance in California, Solar Energy, 84 (2010)UNIVERSITY OF CALIFORNIA, SAN DIEGO Analyzing and SimulatingChair University of California, San Diego iii EPIGRAPH We

Lave, Matthew S.

2012-01-01T23:59:59.000Z

9

Solar Irradiance Variability  

E-Print Network (OSTI)

The Sun has long been considered a constant star, to the extent that its total irradiance was termed the solar constant. It required radiometers in space to detect the small variations in solar irradiance on timescales of the solar rotation and the solar cycle. A part of the difficulty is that there are no other constant natural daytime sources to which the Sun's brightness can be compared. The discovery of solar irradiance variability rekindled a long-running discussion on how strongly the Sun affects our climate. A non-negligible influence is suggested by correlation studies between solar variability and climate indicators. The mechanism for solar irradiance variations that fits the observations best is that magnetic features at the solar surface, i.e. sunspots, faculae and the magnetic network, are responsible for almost all variations (although on short timescales convection and p-mode oscillations also contribute). In spite of significant progress important questions are still open. Thus there is a debat...

Solanki, Sami K

2012-01-01T23:59:59.000Z

10

Measurements of sky luminance, sky illuminance, and horizontal solar radiation  

Science Conference Proceedings (OSTI)

This paper presents initial findings of a sky measurement program currently in progress at the National Bureau of Standards. Measurements are reported on sky luminance and illuminance and how they relate to horizontal solar radiation and sun position. Correlations are presented relating horizontal illuminance to horizontal solar radiation, and zenith luminance to solar altitude. These empirical models are particularly suitable for use in daylighting energy studies since they are based on existing solar data currently available on standard weather tapes.

Treado, S.; Gillette, G.

1983-04-01T23:59:59.000Z

11

Global horizontal irradiance clear sky models : implementation and analysis.  

SciTech Connect

Clear sky models estimate the terrestrial solar radiation under a cloudless sky as a function of the solar elevation angle, site altitude, aerosol concentration, water vapor, and various atmospheric conditions. This report provides an overview of a number of global horizontal irradiance (GHI) clear sky models from very simple to complex. Validation of clear-sky models requires comparison of model results to measured irradiance during clear-sky periods. To facilitate validation, we present a new algorithm for automatically identifying clear-sky periods in a time series of GHI measurements. We evaluate the performance of selected clear-sky models using measured data from 30 different sites, totaling about 300 site-years of data. We analyze the variation of these errors across time and location. In terms of error averaged over all locations and times, we found that complex models that correctly account for all the atmospheric parameters are slightly more accurate than other models, but, primarily at low elevations, comparable accuracy can be obtained from some simpler models. However, simpler models often exhibit errors that vary with time of day and season, whereas the errors for complex models vary less over time.

Stein, Joshua S.; Hansen, Clifford W.; Reno, Matthew J.

2012-03-01T23:59:59.000Z

12

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Honduras from SUNY Honduras from SUNY Dataset Summary Description (Abstract): Zip file contains year-site specific files including time series of global, direct and diffuse irradiance (Purpose): The time series are useful for performing site specific simulation of customized solar energy systems (Supplemental Information): Each file's name identifies year and location, by listing Country_City_latitude-longitude_year, e.g., EL_SALVADOR_San_Salvador_13.75-89.15_98.out is for the city of San Salvador, in El Salvador, latitude 13.75 degrees, longitude -89.15 degrees, year 1998. The content of each file includes A one line header, listing latitude, longitude and ground elevation in meters,Hourly records including, year, month, day, time (GMT), global irradiance, direct irradiance and

13

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Nicaragua from SUNY Nicaragua from SUNY Dataset Summary Description (Abstract): Zip file contains year-site specific files including time series of global, direct and diffuse irradiance (Purpose): The time series are useful for performing site specific simulation of customized solar energy systems (Supplemental Information): Each file's name identifies year and location, by listing Country_City_latitude-longitude_year, e.g., EL_SALVADOR_San_Salvador_13.75-89.15_98.out is for the city of San Salvador, in El Salvador, latitude 13.75 degrees, longitude -89.15 degrees, year 1998. The content of each file includes A one line header, listing latitude, longitude and ground elevation in meters,Hourly records including, year, month, day, time (GMT), global irradiance, direct irradiance and

14

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Guatemala from SUNY Guatemala from SUNY Dataset Summary Description (Abstract): Zip file contains year-site specific files including time series of global, direct and diffuse irradiance (Purpose): The time series are useful for performing site specific simulation of customized solar energy systems (Supplemental Information): Each file's name identifies year and location, by listing Country_City_latitude-longitude_year, e.g., EL_SALVADOR_San_Salvador_13.75-89.15_98.out is for the city of San Salvador, in El Salvador, latitude 13.75 degrees, longitude -89.15 degrees, year 1998. The content of each file includes A one line header, listing latitude, longitude and ground elevation in meters,Hourly records including, year, month, day, time (GMT), global irradiance, direct irradiance and

15

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Cuba sites from SUNY Cuba sites from SUNY Dataset Summary Description (Abstract): Zip file contains year-site specific files including time series of global, direct and diffuse irradiance (Purpose): The time series are useful for performing site specific simulation of customized solar energy systems (Supplemental Information): Each file's name identifies year and location, by listing Country_City_latitude-longitude_year, e.g., EL_SALVADOR_San_Salvador_13.75-89.15_98.out is for the city of San Salvador, in El Salvador, latitude 13.75 degrees, longitude -89.15 degrees, year 1998. The content of each file includes A one line header, listing latitude, longitude and ground elevation in meters,Hourly records including, year, month, day, time (GMT), global irradiance, direct irradiance and

16

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

El Salvador sites from SUNY El Salvador sites from SUNY Dataset Summary Description (Abstract): Zip file contains year-site specific files including time series of global, direct and diffuse irradiance (Purpose): The time series are useful for performing site specific simulation of customized solar energy systems (Supplemental Information): Each file's name identifies year and location, by listing Country_City_latitude-longitude_year, e.g., EL_SALVADOR_San_Salvador_13.75-89.15_98.out is for the city of San Salvador, in El Salvador, latitude 13.75 degrees, longitude -89.15 degrees, year 1998. The content of each file includes A one line header, listing latitude, longitude and ground elevation in meters,Hourly records including, year, month, day, time (GMT), global irradiance, direct irradiance and

17

Solar: annual average global horizontal (GHI) GIS data at 10km resolution  

Open Energy Info (EERE)

global horizontal (GHI) GIS data at 10km resolution global horizontal (GHI) GIS data at 10km resolution for Cuba from SUNY Dataset Summary Description (Abstract): Monthly Average Solar Resource for horizontal flat-plate solar collectors for Cuba (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a horizontal flat-plate solar collector, such as a Photovoltaic (PV) solar panel. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 10 km by 10 km in size. The solar resource value is represented as kilowatt-hours per square meter per day for each month. The data were developed from the State University of New York's (SUNY) GOES satellite solar model. This model uses information on hourly satellite observed visible irradiance, atmospheric water vapor and trace gases, and the amount of aerosols in the atmosphere to calculate the monthly average daily total of the normal or beam insolation falling on a tracking concentrator pointed

18

Results of the Second Diffuse Horizontal Irradiance IOP  

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

Results of the Second Diffuse Horizontal Irradiance IOP Results of the Second Diffuse Horizontal Irradiance IOP J. J. Michalsky Air Resources Laboratory National Oceanic and Atmospheric Administration Boulder, Colorado R. Dolce and A. Los Kipp & Zonen, Inc. Bohemia, New York E. G. Dutton and D. A. Nelson Climate Monitoring and Diagnostics Laboratory, National Oceanic and Atmospheric Administration Boulder, Colorado M. P. Haeffelin Ecole Polytechnique/ Laboratorie de Meteorologie Dynamique Palaiseau Cedex, France W. Q. Jeffries Yankee Environmental System, Inc. Turners Falls, Massachusetts T. L. Stoffel and I. Reda National Renewable Energy Laboratory Golden, Colorado J. Hickey Eppley Laboratory Inc. Newport, Rhode Island D. Mathias Carter-Scott Design Victoria, Australia L. J. B. McArthur

19

Estimating solar irradiance using a geostationary satellite  

E-Print Network (OSTI)

RAM 3.1.2 Compute clearness index 3.1.2 Compute global horizontal irradiance complete Performed to reduce duplicate steps when an analysis

Urquhart, Bryan Glenn

2011-01-01T23:59:59.000Z

20

Electron-Beam Irradiation of Solar Cells  

Science Conference Proceedings (OSTI)

Electron-Beam Irradiation of Solar Cells. Summary: The Dosimetry Group operates a system capable of performing electron ...

2013-02-27T23:59:59.000Z

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


21

Solar: monthly and annual average direct normal (DNI), global horizontal  

Open Energy Info (EERE)

East Asia from NREL East Asia from NREL Dataset Summary Description (Abstract): Monthly Average Solar Resource for horizontal and tilted flat-plates, and 2-axis tracking concentrating collectors. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to solar collectors. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water

22

Solar: monthly and annual average direct normal (DNI), global horizontal  

Open Energy Info (EERE)

Africa from NREL Africa from NREL Dataset Summary Description (Abstract): Monthly Average Solar Resource for horizontal and tilted flat-plates, and 2-axis tracking concentrating collectors. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to solar collectors. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water

23

Solar: annual and seasonal average global horizontal (GHI) GIS data  

Open Energy Info (EERE)

global horizontal (GHI) GIS data global horizontal (GHI) GIS data (contours) for Brazil from INPE and LABSOLAR Dataset Summary Description (Abstract): Annual and seasonal mean of Global Horizontal Solar Radiation in kWh/m2/day based on data from 1995 to 2002 (Purpose): To provide a set of consistent, reliable, verifiable, and accessible global data sets for international and in-country investors and other stakeholders (Supplemental Information): The cross-calibration process worked with data from 3 ground stations: Caicó (located in the Northeast of Brazil), Florianópolis (located in the South) and Balbina (located in Amazonia). These data have been used for validation and comparison of radiation transfer models operated in SWERA to estimate the incidence of solar radiation on the surface of the country from satellite images

24

Modified horizontal solar collector for low temperature grain drying  

DOE Green Energy (OSTI)

The project consisted of constructing a horizontal solar collector with a small amount of rock storage integrated into the collector air stream. The collected energy was used to dry corn in a 6000 bushel low-temperature drying facility. The collector proved to be economically feasible to build and collected sufficient energy to show a reasonable return on the investment.

None

1980-01-27T23:59:59.000Z

25

Total Solar Irradiance Measurements During Solar Cycles 22 and 23  

E-Print Network (OSTI)

Total Solar Irradiance Measurements During Solar Cycles 22 and 23 Sabri Mekaoui Abstract The Total Solar Irradiance (TSI) is a measure of the radiative output from the Sun. Its value and its long solar cycles. Cycle 22 lasted from late 1986 until 1996 while cycle 23 is currently ending

Glineur, François

26

Solar: monthly and annual average direct normal (DNI), global horizontal  

Open Energy Info (EERE)

South America from NREL South America from NREL Dataset Summary Description (Abstract): Monthly Average Solar Resource for horizontal and tilted flat-plates, and 2-axis tracking concentrating collectors. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to solar collectors. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water vapor and trace gases, and the amount of aerosols in the atmosphere to calculate the monthly average daily total insolation (sun and sky) falling on a horizontal surface. Existing ground measurement stations are used to validate the data where possible. The modeled values are accurate to approximately 10% of a true measured value within the grid cell due to the uncertainties associated with meteorological input to the model. The local cloud cover can vary significantly even within a single grid cell as a result of terrain effects and other microclimate influences. Furthermore, the uncertainty of the modeled estimates increase with distance from reliable measurement sources and with the complexity of the terrain.

27

Solar: monthly and annual average direct normal (DNI), global horizontal  

Open Energy Info (EERE)

Central America and the Carribean from NREL Central America and the Carribean from NREL Dataset Summary Description (Abstract): Monthly Average Solar Resource for horizontal and tilted flat-plates, and 2-axis tracking concentrating collectors. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to solar collectors. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water vapor and trace gases, and the amount of aerosols in the atmosphere to calculate the monthly average daily total insolation (sun and sky) falling on a horizontal surface. Existing ground measurement stations are used to validate the data where possible. The modeled values are accurate to approximately 10% of a true measured value within the grid cell due to the uncertainties associated with meteorological input to the model. The local cloud cover can vary significantly even within a single grid cell as a result of terrain effects and other microclimate influences. Furthermore, the uncertainty of the modeled estimates increase with distance from reliable measurement sources and with the complexity of the terrain.

28

Solar: monthly global horizontal (GHI) GIS data at 10km resolution...  

Open Energy Info (EERE)

Central America from SUNY

(Abstract):Monthly Average Solar Resource for horizontal flat-plate solar collectors for Central America
<...

29

An Instrument Design Concept for Measuring Solar Diffuse Irradiance  

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

An Instrument Design Concept for Measuring Solar Diffuse Irradiance An Instrument Design Concept for Measuring Solar Diffuse Irradiance Rutledge, Charles NASA Langley Research Center Schuster, Greg NASA Langley Research Center Category: Instruments Recent effort towards the development of a diffuse horizontal solar irradiance standard group [Michalsky et.al. 2005] using well calibrated pyranometers suggested that inter-instrument differences in cosine response characteristics may be problematic. They showed a calibration method using overcast skies (an approximately uniform radiance distribution) produced superior diffuse radiometer performance when compared to a calibration method using clear skies (which have a radiance distribution systematically varying from horizon to the near vicinity of the sun). The proposed instrument offers a significantly different basic design compared to

30

A New Solar Irradiance Reference Spectrum  

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

A New Solar Irradiance Reference Spectrum Pilewskie, Peter University of Colorado Fontenla, Juan LASP University of Colorado Harder, Jerry LASP University of Colorado Category:...

31

The Sun and Climate Solar Irradiance  

E-Print Network (OSTI)

The Sun and Climate #12;Solar Irradiance The Solar Constant f = 1.4 x 106 erg/cm2/s. Over the surface of the Earth, this is 2 x 1024 erg/s, or 2 x 1017 watts (100 million gigawatts). This energy input keeps the Earth warm. If the solar constant were To change, so would the Earth's temperature. Solar

Walter, Frederick M.

32

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Brazil from NREL Brazil from NREL Dataset Summary Description (Abstract): Each data file is a set of hourly values of solar radiation and meteorological elements for a 1-year period. Solar radiation is modeled using the NREL METSTAT model, with surface observed cloud cover being the principal model input. Each container file contains up to 30 yearly files for one station, plus the Typical Meteorological Year (TMY) file for the selected station, plus documentation files and a TMY data reader file for use with Microsoft Excel. (Purpose): Simulations (Supplemental Information): The intended use of these data files is for computer simulations of solar energy conversion systems and building systems. The yearly data may be suitable for designing systems and their components to meet the worst-case conditions occurring at a

33

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Central America from NREL Central America from NREL Dataset Summary Description (Abstract): Each data file is a set of hourly values of solar radiation and meteorological elements for a 1-year period. Solar radiation is modeled using the NREL METSTAT model, with surface observed cloud cover being the principal model input. Each container file contains up to 30 yearly files for one station, plus the Typical Meteorological Year (TMY) file for the selected station, plus documentation files and a TMY data reader file for use with Microsoft Excel. (Purpose): Simulations (Supplemental Information): The intended use of these data files is for computer simulations of solar energy conversion systems and building systems. The yearly data may be suitable for designing systems and their components to meet the worst-case conditions occurring at a

34

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Ghana from NREL Ghana from NREL Dataset Summary Description (Abstract): Each data file is a set of hourly values of solar radiation and meteorological elements for a 1-year period. Solar radiation is modeled using the NREL METSTAT model, with surface observed cloud cover being the principal model input. Each container file contains up to 30 yearly files for one station, plus the Typical Meteorological Year (TMY) file for the selected station, plus documentation files and a TMY data reader file for use with Microsoft Excel. (Purpose): Simulations (Supplemental Information): The intended use of these data files is for computer simulations of solar energy conversion systems and building systems. The yearly data may be suitable for designing systems and their components to meet the worst-case conditions occurring at a

35

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Sri Lanka from NREL Sri Lanka from NREL Dataset Summary Description (Abstract): Each data file is a set of hourly values of solar radiation and meteorological elements for a 1-year period. Solar radiation is modeled using the NREL METSTAT model, with surface observed cloud cover being the principal model input. Each container file contains up to 30 yearly files for one station, plus the Typical Meteorological Year (TMY) file for the selected station, plus documentation files and a TMY data reader file for use with Microsoft Excel. (Purpose): Simulations (Supplemental Information): The intended use of these data files is for computer simulations of solar energy conversion systems and building systems. The yearly data may be suitable for designing systems and their components to meet the worst-case conditions occurring at a

36

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Ethiopia from NREL Ethiopia from NREL Dataset Summary Description (Abstract): Each data file is a set of hourly values of solar radiation and meteorological elements for a 1-year period. Solar radiation is modeled using the NREL METSTAT model, with surface observed cloud cover being the principal model input. Each container file contains up to 30 yearly files for one station, plus the Typical Meteorological Year (TMY) file for the selected station, plus documentation files and a TMY data reader file for use with Microsoft Excel. (Purpose): Simulations (Supplemental Information): The intended use of these data files is for computer simulations of solar energy conversion systems and building systems. The yearly data may be suitable for designing systems and their components to meet the worst-case conditions occurring at a

37

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Nepal from NREL Nepal from NREL Dataset Summary Description (Abstract): Each data file is a set of hourly values of solar radiation and meteorological elements for a 1-year period. Solar radiation is modeled using the NREL METSTAT model, with surface observed cloud cover being the principal model input. Each container file contains up to 30 yearly files for one station, plus the Typical Meteorological Year (TMY) file for the selected station, plus documentation files and a TMY data reader file for use with Microsoft Excel. (Purpose): Simulations (Supplemental Information): The intended use of these data files is for computer simulations of solar energy conversion systems and building systems. The yearly data may be suitable for designing systems and their components to meet the worst-case conditions occurring at a location, if enough years of data are present. The TMY consists of months selected from individual years and concatenated to form a complete year.. Because of the selection criteria, these TMYs are not appropriate for simulations of wind energy conversion systems. A TMY provides a standard for hourly data for solar radiation and other meteorological elements that permit performance comparisons of system types and configurations for one or more locations. A TMY is not necessarily a good indicator of conditions over the next year, or even the next 5 years. Rather, it represents conditions judged to be typical over a long period of time, such as 30 years.

38

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Kenya from NREL Kenya from NREL Dataset Summary Description (Abstract): Each data file is a set of hourly values of solar radiation and meteorological elements for a 1-year period. Solar radiation is modeled using the NREL METSTAT model, with surface observed cloud cover being the principal model input. Each container file contains up to 30 yearly files for one station, plus the Typical Meteorological Year (TMY) file for the selected station, plus documentation files and a TMY data reader file for use with Microsoft Excel. (Purpose): Simulations (Supplemental Information): The intended use of these data files is for computer simulations of solar energy conversion systems and building systems. The yearly data may be suitable for designing systems and their components to meet the worst-case conditions occurring at a location, if enough years of data are present. The TMY consists of months selected from individual years and concatenated to form a complete year.. Because of the selection criteria, these TMYs are not appropriate for simulations of wind energy conversion systems. A TMY provides a standard for hourly data for solar radiation and other meteorological elements that permit performance comparisons of system types and configurations for one or more locations. A TMY is not necessarily a good indicator of conditions over the next year, or even the next 5 years. Rather, it represents conditions judged to be typical over a long period of time, such as 30 years.

39

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

China from NREL China from NREL Dataset Summary Description (Abstract): Each data file is a set of hourly values of solar radiation and meteorological elements for a 1-year period. Solar radiation is modeled using the NREL METSTAT model, with surface observed cloud cover being the principal model input. Each container file contains up to 30 yearly files for one station, plus the Typical Meteorological Year (TMY) file for the selected station, plus documentation files and a TMY data reader file for use with Microsoft Excel. (Purpose): Simulations (Supplemental Information): The intended use of these data files is for computer simulations of solar energy conversion systems and building systems. The yearly data may be suitable for designing systems and their components to meet the worst-case conditions occurring at a location, if enough years of data are present. The TMY consists of months selected from individual years and concatenated to form a complete year. Because of the selection criteria, these TMYs are not appropriate for simulations of wind energy conversion systems. A TMY provides a standard for hourly data for solar radiation and other meteorological elements that permit performance comparisons of system types and configurations for one or more locations. A TMY is not necessarily a good indicator of conditions over the next year, or even the next 5 years. Rather, it represents conditions judged to be typical over a long period of time, such as 30 years.

40

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Cuba from NREL Cuba from NREL Dataset Summary Description (Abstract): Each data file is a set of hourly values of solar radiation and meteorological elements for a 1-year period. Solar radiation is modeled using the NREL METSTAT model, with surface observed cloud cover being the principal model input. Each container file contains up to 30 yearly files for one station, plus the Typical Meteorological Year (TMY) file for the selected station, plus documentation files and a TMY data reader file for use with Microsoft Excel. (Purpose): Simulations (Supplemental Information): The intended use of these data files is for computer simulations of solar energy conversion systems and building systems. The yearly data may be suitable for designing systems and their components to meet the worst-case conditions occurring at a location, if enough years of data are present. The TMY consists of months selected from individual years and concatenated to form a complete year.. Because of the selection criteria, these TMYs are not appropriate for simulations of wind energy conversion systems. A TMY provides a standard for hourly data for solar radiation and other meteorological elements that permit performance comparisons of system types and configurations for one or more locations. A TMY is not necessarily a good indicator of conditions over the next year, or even the next 5 years. Rather, it represents conditions judged to be typical over a long period of time, such as 30 years.

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


41

Solar: hourly solar (direct normal (DNI), global horizontal (GHI), and  

Open Energy Info (EERE)

Bangladesh stations from NREL Bangladesh stations from NREL Dataset Summary Description (Abstract): Each data file is a set of hourly values of solar radiation and meteorological elements for a 1-year period. Solar radiation is modeled using the NREL METSTAT model, with surface observed cloud cover being the principal model input. Each container file contains up to 30 yearly files for one station, plus the Typical Meteorological Year (TMY) file for the selected station, plus documentation files and a TMY data reader file for use with Microsoft Excel. (Purpose): Simulations (Supplemental Information): The intended use of these data files is for computer simulations of solar energy conversion systems and building systems. The yearly data may be suitable for designing systems and their components to meet the worst-case conditions occurring at a location, if enough years of data are present. The TMY consists of months selected from individual years and concatenated to form a complete year.. Because of the selection criteria, these TMYs are not appropriate for simulations of wind energy conversion systems. A TMY provides a standard for hourly data for solar radiation and other meteorological elements that permit performance comparisons of system types and configurations for one or more locations. A TMY is not necessarily a good indicator of conditions over the next year, or even the next 5 years. Rather, it represents conditions judged to be typical over a long period of time, such as 30 years.

42

Solar: monthly and annual average global horizontal (GHI) GIS data at 10km  

Open Energy Info (EERE)

West China from DLR West China from DLR Dataset Summary Description (Abstract): Data of high resolution (10kmx10km) Global Horizontal Irradiance (GHI) for China for the years 2000, 2002 and 2003. The data are available for monthly and annual sums stored in a ESRI-Shapefile. Please read the country report for additional information. (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords China CRED CREIA DLR GHI GIS solar SWERA UNEP Data application/zip icon Download Shapefile (zip, 4.4 MiB) text/csv icon Download Data (csv, 8.9 MiB)

43

Solar: monthly and annual average global horizontal (GHI) GIS data at 10km  

Open Energy Info (EERE)

Ghana from DLR Ghana from DLR Dataset Summary Description (Abstract): Data of high resolution (10kmx10km) Global Horizontal Irradiance (GHI) for Ghana for the years 2000, 2001 and 2002. The data are available for monthly and annual sums stored in a ESRI-Shapefile. Please read the documentation file for additional information. (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords DLR Ghana GHI GIS solar SWERA UNEP Data application/zip icon Download Shapefile (zip, 504 KiB) text/csv icon Download Data (csv, 1 MiB)

44

Solar: monthly and annual average global horizontal (GHI) GIS data at 10km  

Open Energy Info (EERE)

Ethiopia from DLR Ethiopia from DLR Dataset Summary Description (Abstract): Data of high resolution (10kmx10km) Global Horizontal Irradiance (GHI) for Ethiopia for the years 2000, 2001 and 2002. The data are available for monthly and annual sums stored in a ESRI-Shapefile. Please read the documentation file for additional information. (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords DLR Ethiopia GEF GHI GIS solar SWERA UNEP Data application/zip icon Download Shapefile (zip, 2.8 MiB) text/csv icon Download Data (csv, 5.6 MiB)

45

Solar: monthly and annual average global horizontal (GHI) GIS data at 10km  

Open Energy Info (EERE)

Nepal from DLR Nepal from DLR Dataset Summary Description (Abstract): Data of high resolution (10kmx10km) Global Horizontal Irradiance (GHI) for Nepal for the years 2000, 2002 and 2003. The data are available for monthly and annual sums stored in a ESRI-Shapefile. Please read the country report for additional information. (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords DLR GEF GHI GIS Nepal solar SWERA UNEP Data application/zip icon Download Shapefile (zip, 593.8 KiB) text/csv icon Download Data (csv, 1.2 MiB)

46

Solar: monthly and annual average global horizontal (GHI) GIS data at 10km  

Open Energy Info (EERE)

Sri Lanka from DLR Sri Lanka from DLR Dataset Summary Description (Abstract): Data of high resolution (10kmx10km) Global Horizontal Irradiance (GHI) for Sri Lanka for the years 2000, 2002 and 2003. The data are available for monthly and annual sums stored in a ESRI-Shapefile. Please read the country report for additional information. (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords DLR GHI GIS solar Sri Lanka SWERA UNEP Data text/csv icon Download Data (csv, 296.1 KiB) application/zip icon Download Shapefile (zip, 153.7 KiB)

47

Solar: monthly global horizontal (GHI) GIS data at 10km resolution for  

Open Energy Info (EERE)

Bangladesh from DLR Bangladesh from DLR Dataset Summary Description (Abstract): Data of high resolution (10kmx10km) Global Horizontal Irradiance (GHI) for Bangladesh for the years 2000, 2002 and 2003. The data are available for monthly and annual sums stored in a ESRI-Shapefile. Please read the country report for additional information. (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords Bangladesh DLR GEF GHI GIS solar SWERA UNEP Data text/csv icon Download Data (csv, 916.5 KiB) application/zip icon Download Shapefile (zip, 479.3 KiB)

48

Solar: monthly and annual average global horizontal (GHI) GIS data at 10km  

Open Energy Info (EERE)

Kenya from DLR Kenya from DLR Dataset Summary Description (Abstract): Data of high resolution (10kmx10km) Global Horizontal Irradiance (GHI) for Kenya for the years 2000, 2001 and 2002. The data are available for monthly and annual sums stored in a ESRI-Shapefile. Please read the documentation file for additional information. (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords DLR GEF GHI GIS Kenya NREL solar SWERA UNEP Data application/zip icon Download Shapefile (zip, 1.3 MiB) text/csv icon Download Data (csv, 2.5 MiB)

49

Solar: annual average global horizontal (GHI) GIS data at 10km...  

Open Energy Info (EERE)

at 10km resolution for Cuba from SUNY

(Abstract):Monthly Average Solar Resource for horizontal flat-plate solar collectors for Cuba

(Purpose):<...

50

Validation of the NSRDB-SUNY global horizontal irradiance in California  

Science Conference Proceedings (OSTI)

Satellite derived global horizontal solar irradiance (GHI) from the SUNY modeled dataset in the National Solar Radiation Database (NSRDB) was compared to measurements from 27 weather stations in California during the years 1998-2005. The statistics of spatial and temporal differences between the two datasets were analyzed and related to meteorological phenomena. Overall mean bias errors (MBE) of the NSRDB-SUNY indicated a GHI overprediction of 5%, which is smaller than the sensor accuracy of ground stations. However, at coastal sites, year-round systematic positive MBEs in the NSRDB-SUNY data up to 18% were observed and monthly MBEs increased up to 54% in the summer months during the morning. These differences were explained by a tendency for the NSRDB-SUNY model to overestimate GHI under cloudy conditions at the coast during summer mornings. A persistent positive evening MBE which was independent of site location and cloudiness occurred at all stations and was explained by an error in the time-shifting method applied in the NSRDB-SUNY. A correction method was derived for these two errors to improve the accuracy of the NSRDB-SUNY data in California. (author)

Nottrott, Anders; Kleissl, Jan [Mechanical and Aerospace Engineering, University of California, San Diego (United States)

2010-10-15T23:59:59.000Z

51

Solar: monthly global horizontal (GHI) GIS data at 10km resolution for  

Open Energy Info (EERE)

Central America from SUNY Central America from SUNY Dataset Summary Description (Abstract): Monthly Average Solar Resource for horizontal flat-plate solar collectors for Central America (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a horizontal flat-plate solar collector, such as a Photovoltaic (PV) solar panel. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 10 km by 10 km in size. The solar resource value is represented as kilowatt-hours per square meter per day for each month. The data were developed from the State University of New York's (SUNY) GOES satellite solar model.

52

Total Solar Irradiance Variability and the Solar Activity Cycle  

E-Print Network (OSTI)

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

Probhas Raychaudhuri

2006-01-16T23:59:59.000Z

53

Total Solar Irradiance Variability and the Solar Activity Cycle  

E-Print Network (OSTI)

It is suggested that the solar variability is due to the perturbed nature of the solar core and this variability is provided by the variability of the solar neutrino flux from the solar neutrino detectors i.e., Homestake, Superkamiokande, SAGE and GALLEX-GNO. The solar neutrino flux in the standard solar model (SSM) was calculated on the assumption of L_nu (neutrino luminosity) = L_gamma (optical luminosity) which implies that if there is a change in optical luminosity then solar neutrino flux data will also be changed. An internal dynamo due to the cyclic variation of nuclear energy generation inside the core of the sun is responsible for the solar activity cycle was suggested and thus the internal magnetic field is also variable. Again the changes in the nuclear energy generation induce structural changes that result in variations of the global solar parameters i.e., luminosity, radius and temperatures etc. From the analysis of total solar irradiance (TSI) data during the year from 1970 to 2003 we have foun...

Raychaudhuri, P

2006-01-01T23:59:59.000Z

54

Solar: monthly and annual latitude tilt horizontal GIS data at 40km  

Open Energy Info (EERE)

latitude tilt horizontal GIS data at 40km latitude tilt horizontal GIS data at 40km resolution for Nepal from NREL Dataset Summary Description (Abstract): Monthly Average Solar Resource for flat-plate collectors tilted at latitude for Nepal. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented due south at an angle from horizontal equal to the latitude of the collector location. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The

55

High-Cloud Horizontal Inhomogeneity and Solar Albedo Bias  

Science Conference Proceedings (OSTI)

High ice cloud horizontal inhomogeneity is examined using optical depth retrievals from four midlatitude datasets. Three datasets include ice cloud microphysical profiles derived from millimeter cloud radar at the Southern Great Plains ...

Betty Carlin; Qiang Fu; Ulrike Lohmann; Gerald G. Mace; Kenneth Sassen; Jennifer M. Comstock

2002-09-01T23:59:59.000Z

56

A high-resolution, cloud-assimilating numerical weather prediction model for solar irradiance forecasting  

E-Print Network (OSTI)

ofnumericalweatherpredictionsolarirradianceforecastsofnumericalweatherpredictionforintra?daysolarnumericalweatherpredictionmodelforsolarirradiance

Mathiesen, Patrick; Collier, Craig; Kleissl, Jan

2013-01-01T23:59:59.000Z

57

Solar: monthly and annual average global horizontal (GHI) GIS data at 40km  

Open Energy Info (EERE)

Nepal from NREL Nepal from NREL Dataset Summary Description (Abstract): Monthly average solar resource for horizontal flat-plate collectors for Nepal. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented horizontally. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water

58

Solar: monthly and annual average global horizontal (GHI) GIS data at 40km  

Open Energy Info (EERE)

Ghana from NREL Ghana from NREL Dataset Summary Description (Abstract): Monthly Average Solar Resource for horizontal flat-plate collectors for Ghana. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented horizontally. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water

59

Solar: monthly and annual average global horizontal (GHI) GIS data at 40km  

Open Energy Info (EERE)

Brazil from NREL Brazil from NREL Dataset Summary Description (Abstract): Monthly average solar resource for horizontal flat-plate collectors for Brazil. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented horizontally. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water

60

Solar: monthly and annual average global horizontal (GHI) GIS data at 40km  

Open Energy Info (EERE)

Kenya from NREL Kenya from NREL Dataset Summary Description (Abstract): Monthly average solar resource for horizontal flat-plate collectors for Kenya. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented horizontally. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water

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


61

Solar: monthly and annual average global horizontal (GHI) GIS data at 40km  

Open Energy Info (EERE)

Sri Lanka from NREL Sri Lanka from NREL Dataset Summary Description (Abstract): Monthly Average Solar Resource for horizontal flat-plate collectors, for Sri Lanka (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented horizontally. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water

62

Solar: monthly global horizontal (GHI) GIS data at 40km resolution for  

Open Energy Info (EERE)

40km resolution for 40km resolution for Bangladesh from NREL Dataset Summary Description (Abstract): Monthly average solar resource for horizontal flat-plate collectors for Bangladesh. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented horizontally. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water

63

Direct Solar Spectral Irradiance Measurements and Updated Simple Transmittance Models  

Science Conference Proceedings (OSTI)

A set of 509 direct solar irradiance spectra, carefully measured over one year, is checked against spectral irradiances computed from five updated transmittance models. The wavelengths under investigation range from 290 to 900 nm, with a 5- or 10-...

A. de La Casinire; A. I. Bokoye; T. Cabot

1997-05-01T23:59:59.000Z

64

Influence of Urban Aerosol on Spectral Solar Irradiance  

Science Conference Proceedings (OSTI)

From a dataset of spectral distribution of global and disuse solar irradiances measured in Barcelona during the last three years, the influence of turbidity caused by urban aerosol on spectral composition of solar radiation and transmissivity of ...

J. Lorente; A. Reda; X. De Cabo

1994-03-01T23:59:59.000Z

65

University of Texas Panamerican (UTPA): Solar Radiation Lab (SRL); Edinburg, Texas (Data)  

SciTech Connect

This measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location.

Ramos, J; Andreas, A

2011-09-01T23:59:59.000Z

66

University of Texas Panamerican (UTPA): Solar Radiation Lab (SRL); Edinburg, Texas (Data)  

DOE Data Explorer (OSTI)

This measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location.

Ramos, J.; Andreas, A.

67

Solar: monthly and annual average global horizontal (GHI) GIS data at 40km  

Open Energy Info (EERE)

China from NREL China from NREL Dataset Summary Description (Abstract): Monthly average solar resource for horizontal flat-plate collectors for China. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented horizontally. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water vapor and trace gases, and the amount of aerosols in the atmosphere to calculate the monthly average daily total insolation (sun and sky) falling on a horizontal surface. Existing ground measurement stations are used to validate the data where possible. The modeled values are accurate to approximately 10% of a true measured value within the grid cell due to the uncertainties associated with meteorological input to the model. The local cloud cover can vary significantly even within a single grid cell as a result of terrain effects and other microclimate influences. Furthermore, the uncertainty of the modeled estimates increase with distance from reliable measurement sources and with the complexity of the terrain.

68

Solar: monthly and annual average global horizontal (GHI) GIS data at 40km  

Open Energy Info (EERE)

Mexico, Central America, and the Caribbean Islands from NREL Mexico, Central America, and the Caribbean Islands from NREL Dataset Summary Description (Abstract): Monthly Average Solar Resource for horizontal flat-plate collectors, for Mexico, Central America, and the Caribbean Islands. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented horizontally. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water vapor and trace gases, and the amount of aerosols in the atmosphere to calculate the monthly average daily total insolation (sun and sky) falling on a horizontal surface. Existing ground measurement stations are used to validate the data where possible. The modeled values are accurate to approximately 10% of a true measured value within the grid cell due to the uncertainties associated with meteorological input to the model. The local cloud cover can vary significantly even within a single grid cell as a result of terrain effects and other microclimate

69

Solar: monthly and annual average global horizontal (GHI) GIS data at 40km  

Open Energy Info (EERE)

Ethiopia from NREL Ethiopia from NREL Dataset Summary Description (Abstract): Monthly average solar resource for horizontal flat-plate collectors for Ethiopia. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented horizontally. (Supplemental Information): These data provide monthly average and annual average daily total solar resource averaged over surface cells of approximately 40 km by 40 km in size. The solar resource value is represented as watt-hours per square meter per day for each month. The data were developed from NREL's Climatological Solar Radiation (CSR) Model. This model uses information on cloud cover, atmospheric water vapor and trace gases, and the amount of aerosols in the atmosphere to calculate the monthly average daily total insolation (sun and sky) falling on a horizontal surface. Existing ground measurement stations are used to validate the data where possible. The modeled values are accurate to approximately 10% of a true measured value within the grid cell due to the uncertainties associated with meteorological input to the

70

Optimisation of buildings' solar irradiation availability  

SciTech Connect

In order to improve the sustainability of new and existing urban settlements it is desirable to maximise the utilisation of the solar energy incident on the building envelope, whether by passive or active means. To this end we have coupled a multi-objective optimisation algorithm with the backwards ray tracing program RADIANCE which itself uses a cumulative sky model for the computation of incident irradiation (W h/m{sup 2}) in a single simulation. The parameters to optimise are geometric (the height of buildings up to their facade and the height and orientation of roofs), but with the constraint of maintaining an overall built volume, and the objective function is heating season solar irradiation offset by envelope heat losses. This methodology has been applied to a range of urban typologies and produces readily interpretable results. The focus of this work is on the design of new urban forms but the method could equally be applied to examine the relative efficiency of existing urban settlements, by comparison of existing forms with the calculated optima derived from relevant specifications of the building envelope. (author)

Kaempf, Jerome Henri; Montavon, Marylene; Bunyesc, Josep; Robinson, Darren [Solar Energy and Building Physics Laboratory, Station 18, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne (Switzerland); Bolliger, Raffaele [Industrial Energy Systems Laboratory, Station 9, Ecole Polytechnique Federale de Lausanne, 1015 Lausanne (Switzerland)

2010-04-15T23:59:59.000Z

71

A method for estimating direct normal solar irradiation from satellite data for a tropical environment  

SciTech Connect

In order to investigate a potential use of concentrating solar power technologies and select an optimum site for these technologies, it is necessary to obtain information on the geographical distribution of direct normal solar irradiation over an area of interest. In this work, we have developed a method for estimating direct normal irradiation from satellite data for a tropical environment. The method starts with the estimation of global irradiation on a horizontal surface from MTSAT-1R satellite data and other ground-based ancillary data. Then a satellite-based diffuse fraction model was developed and used to estimate the diffuse component of the satellite-derived global irradiation. Based on this estimated global and diffuse irradiation and the solar radiation incident angle, the direct normal irradiation was finally calculated. To evaluate its performance, the method was used to estimate the monthly average hourly direct normal irradiation at seven pyrheliometer stations in Thailand. It was found that values of monthly average hourly direct normal irradiation from the measurements and those estimated from the proposed method are in reasonable agreement, with a root mean square difference of 16% and a mean bias of -1.6%, with respect to mean measured values. After the validation, this method was used to estimate the monthly average hourly direct normal irradiation over Thailand by using MTSAT-1R satellite data for the period from June 2005 to December 2008. Results from the calculation were displayed as hourly and yearly irradiation maps. These maps reveal that the direct normal irradiation in Thailand was strongly affected by the tropical monsoons and local topography of the country. (author)

Janjai, Serm [Solar Energy Research Laboratory, Department of Physics, Faculty of Science, Silpakorn University, Nakhon Pathom 73000 (Thailand)

2010-09-15T23:59:59.000Z

72

RETHINKING SATELLITE BASED SOLAR IRRADIANCE MODELLING R. W. Mueller  

E-Print Network (OSTI)

. Solar irra- diance schemes provide these data using weather satellites such as METEOSAT and MSGRETHINKING SATELLITE BASED SOLAR IRRADIANCE MODELLING R. W. Mueller , K.F. Dagestad ¡ , R of Oldenburg, D-26111 Oldenburg; 2-University of Bergen; 3-Fraunhofer Institute for Solar Energy Systems; 4

Heinemann, Detlev

73

Summer-heat-gain control in passive-solar-heated buildings: fixed horizontal overhangs  

DOE Green Energy (OSTI)

An aspect of passive cooling relates to cooling load reduction by the use of solar controls. When there is a substantial winter heating requirement, and when the winter heating needs are met in part by a passive solar heating system, then the potential aggravation of summer cooling loads by the heating system is an important design issue. A traditional solution is the use of a fixed, horizontal shading overhang. An approach to quantitative design rules for the sizing of a shading overhang to minimize total annual space conditioning energy needs is outlined.

Jones, R.W.

1981-01-01T23:59:59.000Z

74

Estimating solar irradiance using a geostationary satellite  

E-Print Network (OSTI)

altitude, solar zenith/azimuth, earth -sun radius into RAM1.1.1 Solar Spectrum and the Atmosphere The suns radiationthe solar position and satellite position the sun-satellite

Urquhart, Bryan Glenn

2011-01-01T23:59:59.000Z

75

Estimating solar irradiance using a geostationary satellite  

E-Print Network (OSTI)

optical thickness. Solar Energy 56(3), 239244. Louche A. ,of Linke turbidity factor. Solar Energy 37, 393396. Mrquezfrom Satellite Images. Solar Energy 56, 207212. BP, 2009.

Urquhart, Bryan Glenn

2011-01-01T23:59:59.000Z

76

Estimating solar irradiance using a geostationary satellite  

E-Print Network (OSTI)

compared to the solar spectrum. Source: LI-COR 200S5 1.1.1 Solar Spectrum and theThe extraterrestrial solar spectrum for AM0 (airmass zero)

Urquhart, Bryan Glenn

2011-01-01T23:59:59.000Z

77

Estimating solar irradiance using a geostationary satellite  

E-Print Network (OSTI)

2009. Global Concentrated Solar Power Industry Report 2010Table 1.1 Incoming solar power at the top of the atmosphererate of 32% (WWEA, 2010). Solar power capacity was 16GW at

Urquhart, Bryan Glenn

2011-01-01T23:59:59.000Z

78

Estimating solar irradiance using a geostationary satellite  

E-Print Network (OSTI)

Rayleigh optical thickness. Solar Energy 56(3), 239244.of Linke turbidity factor. Solar Energy 37, 393396. Mrquez2009. Global Concentrated Solar Power Industry Report 2010

Urquhart, Bryan Glenn

2011-01-01T23:59:59.000Z

79

Solar: monthly and annual average direct normal irradiance GIS...  

Open Energy Info (EERE)

>
Direct Normal Irradiance (kWhm2day)
NASA Surface meteorology and Solar Energy (SSE) Release 6.0 Data Set (Jan 2008)
22-year Monthly & Annual Average...

80

South America Global Horizontal SR Solar Model from INPE and LABSOLAR |  

Open Energy Info (EERE)

727 727 Varnish cache server Browse Upload data GDR 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142256727 Varnish cache server South America Global Horizontal SR Solar Model from INPE and LABSOLAR Dataset Summary Description (Abstract): Mean values of Global Horizontal Solar Radiation in kWh/m2/day for 40km cells for 1 year (month, season, year) based on data from 1995 to 2005 (Purpose): To provide a set of consistent, reliable, verifiable, and accessible global data sets for international and in-country investors and other stakeholders. (Supplemental Information): The BRASIL-SR model (developed by INPE - National Institute for Space Research) and the ARCVIEW software were used to produce the dataset and SHAPE files. The assessment of reliability levels of the BRASIL-SR model were performed through the evaluation of the deviations shown by the estimated values for solar radiation flux vis-à-vis the values measured at the surface (ground truth). This evaluation was done in two phases. The first phase consisted in an inter-comparison between the core radiation transfer models adopted by the SWERA Project to map the solar energy in the various countries participating in the project. The HELIOSAT model took part in this phase like benchmark due to its employment to map solar energy resources in countries from European Union. In the second phase, the solar flux estimates provided by the BRASIL-SR model were compared with measured values acquired at several solarimetric stations spread along the Brazilian territory. The BRASIL-SR model is not validated for areas covered by snow.

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


81

The Stabilized Radiometer Platform (STRAP)An Actively Stabilized Horizontally Level Platform for Improved Aircraft Irradiance Measurements  

Science Conference Proceedings (OSTI)

Measurements of solar and infrared irradiance by instruments rigidly mounted to an aircraft have historically been plagued by the introduction of offsets and fluctuations into the data that are solely due to the pitch and roll movements of the ...

Anthony Bucholtz; Robert T. Bluth; Ben Kelly; Scott Taylor; Keir Batson; Anthony W. Sarto; Tim P. Tooman; Robert F. McCoy Jr.

2008-12-01T23:59:59.000Z

82

Brazil Global Horizontal Solar Radiation Model (10km) from INPE | OpenEI  

Open Energy Info (EERE)

10km) from INPE 10km) from INPE Dataset Summary Description (Abstract): Global horizontal solar radiation in kWh/m2/day for 1 year organized into cells with 10km x 10km (Purpose): The BRASIL-SR model and the SPRING software (both developed by INPE - National Institute for Space Research) were used to produce the dataset and SHAPE files (Supplemental Information): The assessment of reliability levels of the BRASIL-SR model were performed through the evaluation of the deviations shown by the estimated values for solar radiation flux vis-à-vis the values measured at the surface (ground truth). This evaluation was done in two phases. The first phase consisted in an inter-comparison between the core radiation transfer models adopted by the SWERA Project to map the solar energy in the various countries participating in the project. The HELIOSAT model took part in this phase like benchmark due to its employment to map solar energy resources in countries from European Union. In the second phase, the solar flux estimates provided by the BRASIL-SR model were compared with measured values acquired at several solarimetric stations spread along the Brazilian territory

83

Brazil Global Horizontal Solar Radiation Model (40km) from INPE | OpenEI  

Open Energy Info (EERE)

40km) from INPE 40km) from INPE Dataset Summary Description (Abstract): Global horizontal solar radiation in kWh/m2/day for 1 year organized into cells with 40km x 40km (Purpose): To provide a set of consistent, reliable, verifiable, and accessible global data sets for international and in-country investors and other stakeholders (Supplemental Information): The BRASIL-SR model and the SPRING software (both developed by INPE - National Institute for Space Research) were used to produce the dataset and SHAPE files. The assessment of reliability levels of the BRASIL-SR model were performed through the evaluation of the deviations shown by the estimated values for solar radiation flux vis-à-vis the values measured at the surface (ground truth). This evaluation was done in two phases. The first phase consisted in an inter-comparison between the core radiation transfer models adopted by the SWERA Project to map the solar energy in the various countries participating in the project. The HELIOSAT model took art in this phase like benchmark due to its employment to map solar energy resources in countries from European Union. In the second phase, the solar flux estimates provided by the BRASIL-SR model were compared with measured values acquired at several solarimetric stations spread along the Brazilian territory.

84

Estimating solar irradiance using a geostationary satellite  

E-Print Network (OSTI)

207. Web References WR1. California Energy Commision (CEC)UNIVERSITY OF CALIFORNIA, SAN DIEGO Estimating SolarChair University of California, San Diego iii DEDICATION

Urquhart, Bryan Glenn

2011-01-01T23:59:59.000Z

85

Improved Solar Power Plant Efficiency: Low Cost Solar Irradiance Sensor  

A University of Colorado research group led by Fernando Mancilla-David has developed a low cost irradiance sensor using a network modeled on a neural ...

86

Estimating Hourly All-Sky Solar Irradiation Components from Meteorological Data  

Science Conference Proceedings (OSTI)

A new method to calculate hourly direct beam and diffuse irradiation on a horizontal surface using 3-h standard meteorological data is described. Comparisons of computed and observed irradiations are made with hourly data obtained in Carpentras ...

F. Kermel

1988-02-01T23:59:59.000Z

87

SOLAR IRRADIANCE FORECASTING FOR THE MANAGEMENT OF SOLAR ENERGY SYSTEMS  

E-Print Network (OSTI)

on the fluctuating wind and solar resources an indispensable necessity. Any efficient imple- mentation of wind-alone photovoltaic or wind energy systems, control systems in buildings, control of solar thermal power plants time constants. For example, an operation of a PV-diesel system needs information in the very short

Heinemann, Detlev

88

Relationships between Measured and Satellite-Estimated Solar Irradiance in Texas  

Science Conference Proceedings (OSTI)

The accuracy of satellite-estimated surface solar irradiance and the relationship between irradiance at pairs of locations and distance between the pairs were examined. Daily measured and satellite-estimated irradiances were available for a 23 ...

William A. Dugas; Mark L. Heuer

1985-08-01T23:59:59.000Z

89

Recent Changes in Solar Irradiance in Antarctica  

Science Conference Proceedings (OSTI)

A significant decrease in the annual sums of global irradiance reaching the surface in Antarctica, averaging ?0.28 W m?2 yr?1, was derived from an analysis of all complete years of measurement available from 12 pyranometer stations, 10 of which ...

G. Stanhill; S. Cohen

1997-08-01T23:59:59.000Z

90

Solar Spectral Irradiance under Clear and Cloudy Skies: Measurements and a Semiempirical Model  

Science Conference Proceedings (OSTI)

In a combined effort, the Centre for Solar Energy and Hydrogen Research in Germany and the Solar Energy Research Institute in the United States analyzed several thousand measurements of the solar spectral irradiance recorded at four sites. The ...

Stefan Nann; Carol Riordan

1991-04-01T23:59:59.000Z

91

Some Effects of the Yellowstone Fire Smoke Cloud on Incident Solar Irradiance  

Science Conference Proceedings (OSTI)

The influence of the 1988 Yellowstone National Park fire, smoke cloud on incident broadband and spectral solar irradiance was studied using measurements made at the Solar Energy Research Institute's Solar Radiation Research Laboratory, Golden, ...

Roland L. Hulstrom; Thomas L. Stoffel

1990-12-01T23:59:59.000Z

92

Method to Calculate Uncertainty Estimate of Measuring Shortwave Solar Irradiance using Thermopile and Semiconductor Solar Radiometers  

DOE Green Energy (OSTI)

The uncertainty of measuring solar irradiance is fundamentally important for solar energy and atmospheric science applications. Without an uncertainty statement, the quality of a result, model, or testing method cannot be quantified, the chain of traceability is broken, and confidence cannot be maintained in the measurement. Measurement results are incomplete and meaningless without a statement of the estimated uncertainty with traceability to the International System of Units (SI) or to another internationally recognized standard. This report explains how to use International Guidelines of Uncertainty in Measurement (GUM) to calculate such uncertainty. The report also shows that without appropriate corrections to solar measuring instruments (solar radiometers), the uncertainty of measuring shortwave solar irradiance can exceed 4% using present state-of-the-art pyranometers and 2.7% using present state-of-the-art pyrheliometers. Finally, the report demonstrates that by applying the appropriate corrections, uncertainties may be reduced by at least 50%. The uncertainties, with or without the appropriate corrections might not be compatible with the needs of solar energy and atmospheric science applications; yet, this report may shed some light on the sources of uncertainties and the means to reduce overall uncertainty in measuring solar irradiance.

Reda, I.

2011-07-01T23:59:59.000Z

93

Mechanisms for total and spectral solar irradiance variations  

E-Print Network (OSTI)

The total and spectral irradiance varies over short time scales, i.e. from days to months, and longer time scales from years to decades, centuries, and beyond. In this talk we review the current understanding of irradiance changes from days to decades. We present the current status of observations and discuss proposed reconstruction approaches to understand these variations. The main question that ultimately needs to be answered is what are the physical processes that could explain the enhanced heating of the photosphere, chromosphere, transition region, and corona, leading to a change in the solar radiative output at various wavelengths. As semi-empirical models allow us to reproduce the solar spectrum over a broad wavelength range, they offer a powerful tool to determine the energy necessary to heat certain layers and at the same time balance the radiative losses.

Haberreiter, M

2010-01-01T23:59:59.000Z

94

Measurement of Broadband Diffuse Solar Irradiance Using Current Commercial Instrumentation with a Correction for Thermal Offset Errors  

Science Conference Proceedings (OSTI)

Diffuse-sky solar irradiance is an important quantity for radiation budget research, particularly as it relates to climate. Diffuse irradiance is one component of the total downwelling solar irradiance and contains information on the amount of ...

Ellsworth G. Dutton; Joseph J. Michalsky; Thomas Stoffel; Bruce W. Forgan; John Hickey; Donald W. Nelson; Timothy L. Alberta; Ibrahim Reda

2001-03-01T23:59:59.000Z

95

Solar irradiance models and measurements: a comparison in the 220 nm to 240 nm wavelength band  

E-Print Network (OSTI)

Solar irradiance models that assume solar irradiance variations to be due to changes in the solar surface magnetic flux have been successfully used to reconstruct total solar irradiance on rotational as well as cyclical and secular time scales. Modelling spectral solar irradiance is not yet as advanced, and also suffers from a lack of comparison data, in particular on solar-cycle time scales. Here we compare solar irradiance in the 220 nm to 240 nm band as modelled with SATIRE-S and measured by different instruments on the UARS and SORCE satellites. We find good agreement between the model and measurements on rotational time scales. The long-term trends, however, show significant differences. Both SORCE instruments, in particular, show a much steeper gradient over the decaying part of cycle 23 than the modelled irradiance or that measured by UARS/SUSIM.

Unruh, Yvonne C; Krivova, Natalie A

2011-01-01T23:59:59.000Z

96

Variation of collector efficiency and receiver thermal loss as a function of solar irradiance  

DOE Green Energy (OSTI)

Efficiency and thermal loss of a parabolic trough concentrating solar collector have been measured for values of solar irradiance between 400 W/m/sup 2/ and 1000 W/m/sup 2/. Both parameters are shown to vary significantly with changing solar irradiance. Significant errors can result from improper use of currently published efficiency data.

Dudley, V.E.; Workhoven, R.M.

1982-01-01T23:59:59.000Z

97

Development and Characterization of a New Solar Ultraviolet-B Irradiance Detector  

Science Conference Proceedings (OSTI)

Characteristics of an instrument for measuring solar ultraviolet-B irradiance are presented together with a description of the instrument. The instrument measures direct and scattered broadband ultraviolet irradiance (wavelengths between 280 and ...

B. K. Dichter; A. F. Beaubien; D. J. Beaubien

1993-06-01T23:59:59.000Z

98

Accounting for the Solar Radiation Influence on Downward Longwave Irradiance Measurements by Pyrgeometers  

Science Conference Proceedings (OSTI)

Measurements of broadband downward longwave (LW) irradiance are carried out at Lampedusa, Italy, in the Mediterranean, jointly with solar irradiance, since 2004 using shaded and unshaded Eppley Precision Infrared Radiometers (PIRs) and Kipp & ...

Daniela Meloni; Claudia Di Biagio; Alcide di Sarra; Francesco Monteleone; Giandomenico Pace; Damiano Massimiliano Sferlazzo

2012-11-01T23:59:59.000Z

99

Stratospheric Temperature and Radiative Forcing Response to 11-Year Solar Cycle Changes in Irradiance and Ozone  

Science Conference Proceedings (OSTI)

The 11-yr solar cycle temperature response to spectrally resolved solar irradiance changes and associated ozone changes is calculated using a fixed dynamical heating (FDH) model. Imposed ozone changes are from satellite observations, in contrast ...

L. J. Gray; S. T. Rumbold; K. P. Shine

2009-08-01T23:59:59.000Z

100

Decline in Global Solar Radiation with Increased Horizontal Visibility in Germany between 1964 and 1990  

Science Conference Proceedings (OSTI)

A statistically significant decrease in mean annual global solar radiation between 1964 and 1990 under completely overcast skies was found at five out of eight studied locations in Germany. A decrease of global solar radiation is also evident in ...

Beate G. Liepert; George J. Kukla

1997-09-01T23:59:59.000Z

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


101

Measuring Solar Spectral and Angle-ofIncidence Effects on Photovoltaic Modules and Solar Irradiance Sensors  

E-Print Network (OSTI)

Historically, two time-of-day dependent factors have complicated the characterization of photovoltaic module and array performance; namely, changes in the solar spectrum over the day and optical effects in the module that vary with the solar angle-of-incidence. This paper describes straightforward methods for directly measuring the effects of these two factors. Measured results for commercial modules, as well as for typical solar irradiance sensors (pyranometers) are provided. The empirical relationships obtained from the measurements can be used to improve the methods used for system design, verification of performance after installation, and diagnostic monitoring of performance during operation. INTRODUCTION It is common knowledge to people familiar with photovoltaic technology that the electrical current generated by photovoltaic devices is influenced by the spectral distribution (spectrum) of sunlight. It is also commonly understood that the spectral distribution of sunlight vari...

David L. King; Jay A. Kratochvil; William E. Boyson

1997-01-01T23:59:59.000Z

102

A new generation of satellite based solar irradiance calculation schemes R. W. Mueller, D. Heinemann, C. Hoyer & R. Kuhlemann  

E-Print Network (OSTI)

for weather forecasting, but also for the estimation of solar irradiance since the knowledge of the lightA new generation of satellite based solar irradiance calculation schemes R. W. Mueller, D. Piernavieja Instituto Tecnologico de Canarias, Spain Keywords: radiative transfer, solar irradiance, MSG

Heinemann, Detlev

103

THE USE OF MSG DATA WITHIN A NEW TYPE OF SOLAR IRRADIANCE CALCULATION SCHEME  

E-Print Network (OSTI)

. Such satellites are therefore not only useful for weather forecasting, but also for the estimation of solarTHE USE OF MSG DATA WITHIN A NEW TYPE OF SOLAR IRRADIANCE CALCULATION SCHEME R. W. Mueller , H; 7-Instituto Tecnologico de Canarias; 8-Fraunhofer Institute for Solar Energy Systems; 9-German

Heinemann, Detlev

104

global horizontal | OpenEI  

Open Energy Info (EERE)

87 87 Varnish cache server Browse Upload data GDR 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142278787 Varnish cache server global horizontal Dataset Summary Description (Abstract): Documentation of the satellite-based high resolution solar resource assessment for Ghana provided by DLR. The high resolution solar data (10kmx10km) provide country maps of the annual and monthly sums of hourly global horizontal and direct normal irradiance (GHI and DNI) for the year 2000, 2001 and 2002. Additionally, for selected sites hourly values of GHI and DNI are provided.The Documentation gives an overview about the used input data and used methodology, shows example maps and describes a comparison with ground data (if provided by the country)

105

NEW SOLAR EXTREME-ULTRAVIOLET IRRADIANCE OBSERVATIONS DURING FLARES  

Science Conference Proceedings (OSTI)

New solar extreme-ultraviolet (EUV) irradiance observations from the NASA Solar Dynamics Observatory (SDO) EUV Variability Experiment provide full coverage in the EUV range from 0.1 to 106 nm and continuously at a cadence of 10 s for spectra at 0.1 nm resolution and even faster, 0.25 s, for six EUV bands. These observations can be decomposed into four distinct characteristics during flares. First, the emissions that dominate during the flare's impulsive phase are the transition region emissions, such as the He II 30.4 nm. Second, the hot coronal emissions above 5 MK dominate during the gradual phase and are highly correlated with the GOES X-ray. A third flare characteristic in the EUV is coronal dimming, seen best in the cool corona, such as the Fe IX 17.1 nm. As the post-flare loops reconnect and cool, many of the EUV coronal emissions peak a few minutes after the GOES X-ray peak. One interesting variation of the post-eruptive loop reconnection is that warm coronal emissions (e.g., Fe XVI 33.5 nm) sometimes exhibit a second large peak separated from the primary flare event by many minutes to hours, with EUV emission originating not from the original flare site and its immediate vicinity, but rather from a volume of higher loops. We refer to this second peak as the EUV late phase. The characterization of many flares during the SDO mission is provided, including quantification of the spectral irradiance from the EUV late phase that cannot be inferred from GOES X-ray diagnostics.

Woods, Thomas N.; Hock, Rachel; Eparvier, Frank; Jones, Andrew R. [Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303 (United States); Chamberlin, Phillip C.; Klimchuk, James A. [NASA Goddard Space Flight Center, Solar Physics Laboratory, Greenbelt, MD 20771 (United States); Didkovsky, Leonid; Judge, Darrell [Space Sciences Center, University of Southern California, Los Angeles, CA 90089 (United States); Mariska, John; Warren, Harry [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States); Schrijver, Carolus J. [Lockheed Martin Solar and Astrophysics Laboratory, Palo Alto, CA 94304 (United States); Webb, David F. [Institute for Scientific Research, Boston College, Chestnut Hill, MA 02467 (United States); Bailey, Scott [Electrical and Computer Engineering Department, Virginia Tech, Blacksburg, VA 24061 (United States); Tobiska, W. Kent, E-mail: tom.woods@lasp.colorado.edu [Space Environment Technologies, Pacific Palisades, CA 90272 (United States)

2011-10-01T23:59:59.000Z

106

Lowry Range Solar Station: Arapahoe County, Colorado (Data)  

DOE Green Energy (OSTI)

A partnership with industry and U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to collect solar data to support future solar power generation in the United States. The measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location. The solar measurement instrumentation is also accompanied by meteorological monitoring equipment to provide scientists with a complete picture of the solar power possibilities.

Yoder, M.; Andreas, A.

2008-05-30T23:59:59.000Z

107

Lowry Range Solar Station: Arapahoe County, Colorado (Data)  

DOE Data Explorer (OSTI)

A partnership with industry and U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to collect solar data to support future solar power generation in the United States. The measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location. The solar measurement instrumentation is also accompanied by meteorological monitoring equipment to provide scientists with a complete picture of the solar power possibilities.

Yoder, M.; Andreas, A.

108

Solar Radiation Monitoring Station (SoRMS): Humboldt State University, Arcata, California (Data)  

Science Conference Proceedings (OSTI)

A partnership with HSU and U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to collect solar data to support future solar power generation in the United States. The measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location.

Wilcox, S..; Andreas, A.

2007-05-02T23:59:59.000Z

109

Solar Radiation Monitoring Station (SoRMS): Humboldt State University, Arcata, California (Data)  

DOE Data Explorer (OSTI)

A partnership with HSU and U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to collect solar data to support future solar power generation in the United States. The measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location.

Wilcox, S..; Andreas, A.

110

Statistical analysis of solar irradiation in a distributed microgrid  

E-Print Network (OSTI)

the production of solar power at different frequencies.Chair In recent decades, solar power has become increasinglyTo allow residential solar power to continue its growth and

Harper, James Patrick

2010-01-01T23:59:59.000Z

111

Validation of a Physical Retrieval Scheme of Solar Surface Irradiances from Narrowband Satellite Radiances  

Science Conference Proceedings (OSTI)

An algorithm is presented to derive the downwelling solar surface irradiance from satellite measurements of the 0.63-?m reflectance, which explicitly accounts for variations in cloud optical depth and integrated water vapor. For validation, a ...

H. Deneke; A. Feijt; A. van Lammeren; C. Simmer

2005-09-01T23:59:59.000Z

112

The Accuracy of Solar Irradiance Calculations Used in Mesoscale Numerical Weather Prediction  

Science Conference Proceedings (OSTI)

In this paper, solar irradiance forecasts made by mesoscale numerical weather prediction models are compared with observations taken during three air-quality experiments in various parts of the United States. The authors evaluated the fifth-...

Robert J. Zamora; Ellsworth G. Dutton; Michael Trainer; Stuart A. McKeen; James M. Wilczak; Yu-Tai Hou

2005-04-01T23:59:59.000Z

113

Determination of Semivariogram Models to Krige Hourly and Daily Solar Irradiance in Western Nebraska  

Science Conference Proceedings (OSTI)

In this paper, linear and spherical semivariogram models were determined for use in kriging hourly and daily solar irradiation for every season of the year. The data used to generate the models were from 18 weather stations in western Nebraska. ...

G. G. Merino; D. Jones; D. E. Stooksbury; K. G. Hubbard

2001-06-01T23:59:59.000Z

114

The Origin of Haze in the Central United States and Its Effect on Solar Irradiation  

Science Conference Proceedings (OSTI)

The depletion by atmospheric haze of solar irradiation at the earth's surface in the central United States is estimated and some aspects of the origin of the haze investigated. Observed optical properties of the haze are reviewed and their ...

R. J. Ball; G. D. Robinson

1982-02-01T23:59:59.000Z

115

Effects of the El Chichon Volcanic Cloud on Direct and Diffuse Solar Irradiances  

Science Conference Proceedings (OSTI)

Direct normal and diffuse solar irradiances and 500 nm aerosol optical depths measured at the University of Michigan departed far from normal on 26 October 1982, when it is concluded that the main stratospheric cloud from the El Chichon volcanic ...

C. Bruce Baker; William R. Kuhn; Edward Ryznar

1984-03-01T23:59:59.000Z

116

A Method to Correct the Thermal Dome Effect of Pyranometers in Selected Historical Solar Irradiance Measurements  

Science Conference Proceedings (OSTI)

In using pyranometers to measure solar irradiance, it is important to know the magnitudes and the consequences of the thermal effect, which is introduced by the glass domes of the instruments. Historically, the thermal dome effect was not ...

Qiang Ji

2007-03-01T23:59:59.000Z

117

Radiative Heat Transfer Analysis within Three-Dimensional Clouds Subjected to Solar and Sky Irradiation  

Science Conference Proceedings (OSTI)

A three-dimensional radiative heat transfer analysis of an arbitrary-shaped modeled cloud subjected to solar and sky irradiation has been performed. The Radiation Element Method by Ray Emission Model (REM2) was used for numerical simulation. ...

Toru Nishikawa; Shigenao Maruyama; Seigo Sakai

2004-12-01T23:59:59.000Z

118

An Assessment of Models which use Satellite Data to Estimate Solar Irradiance at the Earth's Surface  

Science Conference Proceedings (OSTI)

The performances of three models which use satellite data to estimate solar irradiance at the Earth's surface are assessed using measured radiation data from a midlatitude location. Assessment of the models is made possible through the accurate ...

Clifford Raphael; John E. Hay

1984-05-01T23:59:59.000Z

119

Statistical analysis of solar irradiation in a distributed microgrid.  

E-Print Network (OSTI)

??In recent decades, solar power has become increasingly more efficient and wide-spread in its use, particularly in residential applications. To allow residential solar power to (more)

Harper, James Patrick

2010-01-01T23:59:59.000Z

120

TRENDS IN DIRECT NORMAL SOLAR IRRADIANCE IN OREGON FROM 1979-2003 Laura Riihimaki  

E-Print Network (OSTI)

TRENDS IN DIRECT NORMAL SOLAR IRRADIANCE IN OREGON FROM 1979-2003 Laura Riihimaki Frank Vignola of trends in direct normal irradiance from three sites around Oregon over a period of 25 years. An overall. Changes in clear noon values are also examined. This article analyzes direct normal data unlike other

Oregon, University of

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


121

The Impact of Different Absolute Solar Irradiance Values on Current Climate Model Simulations  

Science Conference Proceedings (OSTI)

Simulations of the pre-industrial and doubled CO2 climates are made with the GISS GCMAM using two different estimates of the absolute solar irradiance value, a higher value measured by solar radiometers in the 1990s and the lower value measured ...

David H. Rind; Judith L. Lean; Jeffrey Jonas

122

Combined analysis of solar neutrino and solar irradiance data: further evidence for variability of the solar neutrino flux and its implications concerning the solar core  

E-Print Network (OSTI)

A search for any particular feature in any single solar neutrino dataset is unlikely to establish variability of the solar neutrino flux since the count rates are very low. It helps to combine datasets, and in this article we examine data from both the Homestake and GALLEX experiments. These show evidence of modulation with a frequency of 11.85 yr-1, which could be indicative of rotational modulation originating in the solar core. We find that precisely the same frequency is prominent in power spectrum analyses of the ACRIM irradiance data for both the Homestake and GALLEX time intervals. These results suggest that the solar core is inhomogeneous and rotates with sidereal frequency 12.85 yr-1. We find, by Monte Carlo calculations, that the probability that the neutrino data would by chance match the irradiance data in this way is only 2 parts in 10,000. This rotation rate is significantly lower than that of the inner radiative zone (13.97 yr-1) as recently inferred from analysis of Super-Kamiokande data, suggesting that there may be a second, inner tachocline separating the core from the radiative zone. This opens up the possibility that there may be an inner dynamo that could produce a strong internal magnetic field and a second solar cycle.

P. A. Sturrock

2008-05-23T23:59:59.000Z

123

Solar: hourly global horizontal (GHI) and direct normal (DNI) data for  

Open Energy Info (EERE)

Ethiopia from DLR Ethiopia from DLR Dataset Summary Description (Abstract): Hourly time series of GHI and DNI for the years 2000, 2001 and 2002 for selected sites in Ethiopia. The hourly data are stored in ASCII files for each station. Please read the documentation file for additional information. (Purpose): For the selected sites, the hourly time series can be used for the simulation of Photovoltaic (PV)-systems or Concentrating Solar Power (CSP)-systems. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords DLR DNI GHI hourly data solar SWERA TILT UNEP Data application/zip icon Download data (zip, 2.1 MiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage

124

Solar: hourly global horizontal (GHI) and direct normal (DNI) data for  

Open Energy Info (EERE)

Kenya from DLR Kenya from DLR Dataset Summary Description (Abstract): Hourly time series of GHI and DNI for the years 2000, 2001 and 2002 for selected sites in Kenya. The hourly data are stored in ASCII files for each station. Please read the documentation file for additional information. (Purpose): For the selected sites, the hourly time series can be used for the simulation of Photovoltaic (PV)-systems or Concentrating Solar Power (CSP)-systems. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords DLR DNI GEF GHI hourly data Kenya solar SWERA TILT UNEP Data application/zip icon Download data (zip, 3.9 MiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage

125

Solar: hourly global horizontal (GHI) and direct normal (DNI) data for  

Open Energy Info (EERE)

Nepal from DLR Nepal from DLR Dataset Summary Description (Abstract): Hourly time series of GHI and DNI for the years 2000, 2002 and 2003 for selected sites in Nepal. The hourly data are stored in ASCII files for each station. Please read the documentation file for additional information. (Purpose): For the selected sites, the hourly time series can be used for the simulation of Photovoltaic (PV)-systems or Concentrating Solar Power (CSP)-systems. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords DLR DNI GEF GHI hourly data Nepal NREL solar SWERA TILT UNEP Data application/zip icon Download data (zip, 1.2 MiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage

126

Solar: hourly global horizontal (GHI) and direct normal (DNI) data for  

Open Energy Info (EERE)

Sri Lanka sites from DLR Sri Lanka sites from DLR Dataset Summary Description (Abstract): Hourly time series of GHI and DNI for the years 2000, 2002 and 2003 for selected sites in Sri Lanka. The hourly data are stored in ASCII files for each station. Please read the documentation file for additional information. (Purpose): For the selected sites, the hourly time series can be used for the simulation of Photovoltaic (PV)-systems or Concentrating Solar Power (CSP)-systems. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords DLR DNI GHI hourly data solar Sri Lanka SWERA TILT UNEP Data application/zip icon Download data (zip, 368.2 KiB) Quality Metrics Level of Review Some Review Comment

127

Solar: hourly global horizontal (GHI) and direct normal (DNI) data for  

Open Energy Info (EERE)

China sites from DLR China sites from DLR Dataset Summary Description (Abstract): Hourly time series of GHI and DNI for the years 2000, 2002 and 2003 for selected sites in China. The hourly data are stored in ASCII files for each station. Please read the documentation file for additional information. (Purpose): For the selected sites, the hourly time series can be used for the simulation of Photovoltaic (PV)-systems or Concentrating Solar Power (CSP)-systems. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords China DLR DNI GEF GHI solar SWERA UNEP Data application/zip icon Download Data (zip, 953.6 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage

128

Solar: hourly global horizontal (GHI) and direct normal (DNI) data for  

Open Energy Info (EERE)

Ghana from DLR Ghana from DLR Dataset Summary Description (Abstract): Hourly time series of GHI and DNI for the years 2000, 2001 and 2002 for selected sites in Ghana. The hourly data are stored in ASCII files for each station. Please read the documentation file for additional information. (Purpose): For the selected sites, the hourly time series can be used for the simulation of Photovoltaic (PV)-systems or Concentrating Solar Power (CSP)-systems. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords DLR DNI Ghana GHI hourly data solar SWERA TILT TMY UNEP Data application/zip icon ghanaDLRtimeseries_103.zip (zip, 2.7 MiB) Quality Metrics Level of Review Some Review Comment

129

Solar: hourly global horizontal (GHI) and direct normal (DNI) data for  

Open Energy Info (EERE)

Bangladesh sites from DLR Bangladesh sites from DLR Dataset Summary Description (Abstract): Hourly time series of GHI and DNI for the years 2000, 2002 and 2003 for selected sites in Bangladesh. The hourly data are stored in ASCII files for each station. Please read the documentation file for additional information. (Purpose): For the selected sites, the hourly time series can be used for the simulation of Photovoltaic (PV)-systems or Concentrating Solar Power (CSP)-systems. Source DLR - Deutsches Zentrum für Luft- und Raumfahrt Date Released October 31st, 2004 (10 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords Bangladesh DLR DNI GHI hourly data solar SWERA UNEP Data application/zip icon Download Data (zip, 1.2 MiB) Quality Metrics Level of Review Some Review Comment

130

Analyzing and simulating the variability of solar irradiance and solar PV powerplants  

E-Print Network (OSTI)

Variability, Solar Energy, 84 (2010) [17] National Weathernumerical weather prediction for intra-day solar forecastingweather and the choice and quality control of the solar

Lave, Matthew S.

2012-01-01T23:59:59.000Z

131

Analyzing and simulating the variability of solar irradiance and solar PV powerplants  

E-Print Network (OSTI)

of Tracking for Capturing Solar Radiation in the ContinentalTime Scales of the Surface Solar Radiation Field, Journal ofof Tracking for Capturing Solar Radiation in the Continental

Lave, Matthew S.

2012-01-01T23:59:59.000Z

132

Analyzing and simulating the variability of solar irradiance and solar PV powerplants  

E-Print Network (OSTI)

WVM) for Solar PV Power Plants .. 73funding from the DOE High Solar PV Penetration grant 10DE-Variability Model (WVM) for Solar PV Power Plants 2012

Lave, Matthew S.

2012-01-01T23:59:59.000Z

133

Statistical analysis of solar irradiation in a distributed microgrid  

E-Print Network (OSTI)

irradiation in a distributed microgrid A Thesis submitted inin a distributed microgrid by James Patrick Harper Master of

Harper, James Patrick

2010-01-01T23:59:59.000Z

134

direct normal irradiance | OpenEI  

Open Energy Info (EERE)

normal irradiance normal irradiance Dataset Summary Description (Abstract): Monthly Average Solar Resource for horizontal and tilted flat-plates, and 2-axis tracking concentrating collectors. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to solar collectors. Source NREL Date Released July 31st, 2006 (8 years ago) Date Updated October 30th, 2007 (7 years ago) Keywords direct normal irradiance DNI GEF GHI GIS global horizontal irradiance insolation latitutde tilt irradiance NASA NREL South America SWERA TILT UNEP Data application/zip icon Download Shapefile and Cell Maps (zip, 13.9 MiB) text/csv icon Download Data (csv, 3.5 MiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage

135

A Model for Solar Spectral Irradiance and Radiance at the Bottom and Top of a Cloudless Atmosphere  

Science Conference Proceedings (OSTI)

A simple model is presented that, in a cloud-free atmosphere, calculates solar spectral direct and diffuse irradiance and directional radiance at the surface, spectral absorption within the atmosphere and the upward reflected spectral irradiance ...

C. G. Justus; M. V. Paris

1985-03-01T23:59:59.000Z

136

Combined analysis of solar neutrino and solar irradiance data: further evidence for variability of the solar neutrino flux and its implications concerning the solar core  

E-Print Network (OSTI)

A search for any particular feature in any single solar neutrino dataset is unlikely to establish variability of the solar neutrino flux since the count rates are very low. It helps to combine datasets, and in this article we examine data from both the Homestake and GALLEX experiments. These show evidence of modulation with a frequency of 11.85 yr-1, which could be indicative of rotational modulation originating in the solar core. We find that precisely the same frequency is prominent in power spectrum analyses of the ACRIM irradiance data for both the Homestake and GALLEX time intervals. These results suggest that the solar core is inhomogeneous and rotates with sidereal frequency 12.85 yr-1. We find, by Monte Carlo calculations, that the probability that the neutrino data would by chance match the irradiance data in this way is only 2 parts in 10,000. This rotation rate is significantly lower than that of the inner radiative zone (13.97 yr-1) as recently inferred from analysis of Super-Kamiokande data, sugg...

Sturrock, P A

2008-01-01T23:59:59.000Z

137

Solar Desalination in the Southwest United States: A Thermoeconomic Analysis Utilizing the Sun to Desalt Water in High Irradiance Regions .  

E-Print Network (OSTI)

??Water scarcity and high irradiance overlap in the southwestern United States. This thesis explores solar energy as a method to power desalination in the Southwest. (more)

Stroud, Matthew

2012-01-01T23:59:59.000Z

138

Solar desalination in the southwest United States| A thermoeconomic analysis utilizing the sun to desalt water in high irradiance regions.  

E-Print Network (OSTI)

?? Water scarcity and high irradiance overlap in the southwestern United States. This thesis explores solar energy as a method to power desalination in the (more)

Stroud, Matthew

2012-01-01T23:59:59.000Z

139

A new approach to long-term reconstruction of the solar irradiance leads to large historical solar forcing  

E-Print Network (OSTI)

The variable Sun is the most likely candidate for natural forcing of past climate change on time scales of 50 to 1000 years. Evidence for this understanding is that the terrestrial climate correlates positively with solar activity. During the past 10,000 years, the Sun has experienced substantial variations in activity and there have been numerous attempts to reconstruct solar irradiance. While there is general agreement on how solar forcing varied during the last several hundred years --- all reconstructions are proportional to the solar activity --- there is scientific controversy on the magnitude of solar forcing. We present a reconstruction of the Total and Spectral Solar Irradiance covering 130 nm--10 $\\mu$m from 1610 to the present with annual resolution and for the Holocene with 22-year resolution. We assume that the minimum state of the quiet Sun in time corresponds to the observed quietest area on the present Sun. Then we use available long-term proxies of the solar activity, which are $^{10}$Be isot...

Shapiro, A I; Rozanov, E; Schoell, M; Haberreiter, M; Shapiro, A V; Nyeki, S

2011-01-01T23:59:59.000Z

140

The sun as a variable star: solar and stellar irradiance variations. Final report  

DOE Green Energy (OSTI)

The main objective of this Colloquium was to review the most recent results on the observations, theoretical interpretations, empirical and physical models of the variations observed in solar and stellar irradiances, as well as on Sun-climate connections. The Colloquium was divided into six sessions as defined by the key topics. Included for each session were the 36 invited talks and 110 contributed poster papers. A special session of the Solar Electromagnetic Radiation Study for Solar Cycle 22 (SOLERS22) was held on June 25, 1993, where the five working groups discussed their progress and future plans on measuring the absolute value of solar total and spectral irradiances and studying their temporal variations. Papers on both theoretical models and solar irradiance observations have shown that the solar energy output changes on different time scales: the short-term (from minutes to months) variations are related to surface modulations mainly caused by the evolution of active regions, the solar cycle related long-term variations are directly linked with the evolution of magnetic fields over the activity cycle, while the secular variations over centuries are associated with long-term modulations.

Pap, J.M.

1994-12-31T23:59:59.000Z

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


141

Analyzing and simulating the variability of solar irradiance and solar PV powerplants.  

E-Print Network (OSTI)

??Solar energy is a promising renewable resource, but the variability of solar photovoltaic (PV) power due to cloud- caused fluctuations is a concern for electric (more)

Lave, Matthew S.

2012-01-01T23:59:59.000Z

142

Comparison of Model Estimated and Measured Direct-Normal Solar Irradiance  

E-Print Network (OSTI)

Direct-normal solar irradiance (DNSI), the total energy in the solar spectrum incident in unit time on a unit area at the earth's surface perpendicular to the direction to the Sun, depends only on atmospheric extinction of solar energy without regard to the details of the extinction - whether absorption or scattering. Here we report a set of closure experiments performed in north-central Oklahoma in April 1996, under cloud-free conditions, wherein measured atmospheric composition and aerosol optical thickness are input to a radiative transfer model, MODTRAN-3, to estimate DNSI, which is then compared with measured values obtained with normal incidence pyrheliometers and absolute cavity radiometers. Uncertainty in aerosol optical thickness (AOT) dominates the uncertainty in DNSI calculation. AOT measured by an independently calibrated sunphotometer and a rotating Direct-Normal Solar Irradiance - A Closure Experiment, Halthore et al. 2 shadow-band radiometer agree to within the uncerta...

Rangasayi Halthore; Schwartz; S. E.; Michalsky; J. J.; Anderson; G. P.; Gail P. Anderson; Ferrare R. A.; ten Brink H. M; Holben B. N.; Harry M. Ten Brink

1997-01-01T23:59:59.000Z

143

Improving the Accuracy of Using Pyranometers to Measure the Clear Sky Global Solar Irradiance  

DOE Green Energy (OSTI)

Pyranometer users have customarily applied one responsivity value when calculating the global solar irradiance. Usually, the responsivity value is reported by either the manufacturer or a calibration facility. Many pyranometer calibrations, made both at NREL and elsewhere, have shown that the responsivity of a pyranometer changes with the change in solar zenith and azimuth angles. Depending on how well the pyranometer sensor is radiometrically leveled, these changes can exceed +/-5% of the reported responsivity, which means that errors in the calculated global solar irradiance can exceed +/-5% from the nominal values. This paper describes a method to decrease the errors resulting from the change of the solar zenith angle under clear sky conditions. Two responsivity functions, morning and afternoon, were used instead of one responsivity value. The two functions have been chosen because of asymmetry of the morning and afternoon cosine responses demonstrated by some pyranometers.

Reda, I.

1998-06-01T23:59:59.000Z

144

Horizontal Plate Plate  

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

Horizontal Plate Plate Horizontal Plate Plate Metadata also available as Metadata: Identification_Information Data_Quality_Information Spatial_Data_Organization_Information Spatial_Reference_Information Entity_and_Attribute_Information Distribution_Information Metadata_Reference_Information Identification_Information: Citation: Citation_Information: Originator: Ray George Publication_Date: Unknown Title: Horizontal Plate Plate Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: Description: Abstract: Monthly and annual average solar resource potential for the lower 48 states Purpose: Provide information on the solar resource potential for the lower 48

145

Intercomparison of Spectroradiometers for Global and Direct Solar Irradiance in the Visible Range  

Science Conference Proceedings (OSTI)

This paper presents the results of the analysis of the spectral, global, and direct solar irradiance measurements in the visible range (400700 nm) that were made in the framework of the first Iberian UVvisible (VIS) instruments intercomparison. ...

Jos A. Martnez-Lozano; Maria P. Utrillas; Roberto Pedrs; Fernando Tena; Juan P. Daz; Francisco J. Expsito; Jernimo Lorente; Xavier de Cabo; Victoria Cachorro; Ricardo Vergaz; Virgilio Carreo

2003-07-01T23:59:59.000Z

146

Solar Irradiance Anomalies Caused by Clear-Sky Transmission Variations above Mauna Loa: 195899  

Science Conference Proceedings (OSTI)

The clear-sky transmission of the atmosphere contributes to determining the amount of solar irradiance that reaches various levels in the atmosphere, which in turn is fundamental to defining the climate of the earth. As of the end of 1999, ...

Ellsworth G. Dutton; Barry A. Bodhaine

2001-08-01T23:59:59.000Z

147

A Technique for Global Monitoring of Net Solar Irradiance at the Ocean Surface. Part II: Validation  

Science Conference Proceedings (OSTI)

The present study constitutes the generation and validation of the first satellite-based, long-term record of surface solar irradiance over the global oceans. The record is generated using Nimbus-7 earth radiation budget (ERB) wide-field-of-view (...

Beth Chertock; Robert Frouin; Catherine Gautier

1992-09-01T23:59:59.000Z

148

A Technique for Global Monitoring of Net Solar Irradiance at the Ocean Surface. Part I: Model  

Science Conference Proceedings (OSTI)

An algorithm based on radiative transfer theory is presented to generate the first accurate, long-term (84- month) climatology of net surface solar irradiance over the global oceans from Nimbus-7 earth radiation budget (ERB) wide-field-of-view ...

Robert Frouin; Beth Chertock

1992-09-01T23:59:59.000Z

149

Net Surface Solar Irradiance Variability in the Central Equatorial Pacific during 19821985  

Science Conference Proceedings (OSTI)

This paper examines the evolution of the net surface solar irradiance from March 1982 to October 1985 in an important region of the equatorial Pacific where the TROPIC HEAT Experiment took place (4.6N to 7.4S, 142.6 to 117.17W). The ...

Catherine Gautier; Robert Frouin

1992-01-01T23:59:59.000Z

150

Solar and Wind Energy Resource Assessment in Nepal | OpenEI  

Open Energy Info (EERE)

in Nepal in Nepal Dataset Summary Description (Abstract): Global Horizontal Solar Irradiance is developed based on a linear regression model that has been developed to correlate the theoretical and ground measured solar irradiance on the basis of available ground measured Global Horizontal Solar Irradiance at three locations: a) Syangboche (Solukhumbu) b) Pulchowk (Lalitpur) and c) Prakashpur (Sunsari). These locations represent the three different geographical regions: Mountain, Hill and Plain. The model is used for converting the theoretical Global Horizontal Solar Irradiance to actual solar irradiance in 15 meteorological stations spread throughout the country. Interpolating the data obtained at these stations, a map has been developed using ArcView GIS software. The existing methodology for projecting wind speedat 2m height from DHM meteorological station data to 10m height, shows a deviated figures. In other to develop wind map, valid methodology is required which can project the low height wind speed to higher heights. The projected data (Thini and Thakmarpha) when

151

STATUS OF HIGH RESOLUTION SOLAR IRRADIANCE MAPPING FROM SATELLITE DATA  

E-Print Network (OSTI)

Vignola Solar Energy Laboratory University of Oregon Eugene, OR 97403 fev@darkwing.uoregon.edu Pierre Burlington, KS, USA BURL Dry continental 38.2 -95.6 362 1 year ARM program Austin, TX, USA AUST Semi arid 30 Semi arid 39.75 -105.18 1706 5 years Natl. Renewable Energy Lab Caico, RG do Norte, Brazil CAIC

Perez, Richard R.

152

Short-Range Direct and Diffuse Irradiance Forecasts for Solar Energy Applications Based on Aerosol Chemical Transport and Numerical Weather Modeling  

Science Conference Proceedings (OSTI)

This study examines 23-day solar irradiance forecasts with respect to their application in solar energy industries, such as yield prediction for the integration of the strongly fluctuating solar energy into the electricity grid. During cloud-...

Hanne Breitkreuz; Marion Schroedter-Homscheidt; Thomas Holzer-Popp; Stefan Dech

2009-09-01T23:59:59.000Z

153

27Solar Irradiance Changes and the Sunspot Cycle Irradiance (also called insolation) is a measure of the amount of sunlight power  

E-Print Network (OSTI)

system generate in 1989? Space Math http://spacemath.gsfc.nasa.gov #12;27Answer Key Problem 1 - About to be the relationship between sunspot number and solar irradiance? Problem 3 - A homeowner built a solar electricity (photovoltaic) system on his roof in 1985 that produced 3,000 kilowatts-hours of electricity that year. Assuming

154

Local-Scale Variability of Solar Radiation in a Mountainous Region  

Science Conference Proceedings (OSTI)

Simultaneous measurements of horizontal global solar irradiance and other meteorological parameters have been taken over three years at a dense radiometric network. The network is located on a mountainous region in southeastern Spain (37N, 3W) ...

J. Tovar; F. J. Olmo; L. Alados-Arboledas

1995-10-01T23:59:59.000Z

155

The Influence of High-Energy Lithium Ion Irradiation on Electrical Characteristics of Silicon and GaAs Solar Cells  

E-Print Network (OSTI)

Space-grade Si and GaAs solar cells were irradiated with 15 & 40 MeV Li ions. Illuminated (AM0 condition) and unilluminated I-V curves reveal that the effect of high-energy Li ion irradiation has produced similar effects to that of proton irradiation. However, an additional, and different, defect mechanism is suggested to dominate in the heavier-ion results. Comparison is made with proton-irradiated solar-cell work and with non-ionizing energy-loss (NIEL) radiation-damage models.

B. Jayashree; Ramani; M. C. Radhakrishna; Anil Agrawal; Saif Ahmad Khan; A. Meulenberg

2006-10-20T23:59:59.000Z

156

The Skin-Layer Ocean Heat Flux Instrument (SOHFI). Part II: Field Measurements of Surface Heat Flux and Solar Irradiance  

Science Conference Proceedings (OSTI)

The Skin-Layer Ocean Heat Flux Instrument (SOHFI) described by Sromovsky et al. (Part I, this issue) was field-tested in a combination of freshwater and ocean deployments. Solar irradiance monitoring and field calibration techniques were ...

L. A. Sromovsky; J. R. Anderson; F. A. Best; J. P. Boyle; C. A. Sisko; V. E. Suomi

1999-09-01T23:59:59.000Z

157

Surface Measurements of Solar Irradiance: A Study of the Spatial Correlation between Simultaneous Measurements at Separated Sites  

Science Conference Proceedings (OSTI)

Pyranometers have been used for many years to measure broadband surface incoming solar irradiance, data that is necessary for surface energy budget, cloud forcing, and satellite validation research. Because such measurements are made at a ...

Charles N. Long; Thomas P. Ackerman

1995-05-01T23:59:59.000Z

158

Satellite-Derived Surface Radiation Budget over the African Continent. Part I: Estimation of Downward Solar Irradiance and Albedo  

Science Conference Proceedings (OSTI)

Downward surface solar irradiance and albedo of the African continent are estimated from Meteosat B2 data at 30-km spatial resolution. The algorithm, based on Dedieu et al.s approach, is verified against other satellite estimates and ground-...

Mamoudou B. Ba; Robert Frouin; Sharon E. Nicholson; Grard Dedieu

2001-01-01T23:59:59.000Z

159

Statistical Predictability and Parametric Models of Daily Ambient Temperature and Solar Irradiance: An Analysis in the Italian Climate  

Science Conference Proceedings (OSTI)

Stochasticdynamic models are discussed for both air temperature and solar irradiance daily time series in the Italian climate. Most of the methodologies discussed in this paper are well known and established for processes having a Gaussian ...

U. Amato; V. Cuomo; F. Fontana; C. Serio

1989-08-01T23:59:59.000Z

160

Definition: Direct normal irradiance | Open Energy Information  

Open Energy Info (EERE)

normal irradiance normal irradiance (Redirected from Definition:DNI) Jump to: navigation, search Dictionary.png Direct normal irradiance the amount of solar radiation received per unit area by a surface perpendicular (normal) to the rays that come in a straight line from the direction of the sun at its current position in the sky.[1] Also Known As DNI Related Terms Solar radiation, Irradiance, Concentrating solar power, Global horizontal irradiance References ↑ http://www.3tier.com/en/support/glossary/#dni Retrie LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ved from "http://en.openei.org/w/index.php?title=Definition:Direct_normal_irradiance&oldid=423379" Category: Definitions What links here Related changes Special pages Printable version Permanent link

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


161

I-V analysis of high-energy lithium-ion-irradiated Si and GaAs solar cells  

E-Print Network (OSTI)

Space-grade Si and GaAs solar cells were irradiated with 15 and 40 MeV lithium ions. Dark-IV analysis (with and without illumination) reveals differences in the effects of such irradiation on the different cell types

A. Meulenberg Jr; B. Jayashree; Ramani; M. C. Radhakrishna; A. K. Saif

2007-09-07T23:59:59.000Z

162

Recent variability of the solar spectral irradiance and its impact on climate modelling  

E-Print Network (OSTI)

The lack of long and reliable time series of solar spectral irradiance (SSI) measurements makes an accurate quantification of solar contributions to recent climate change difficult. Whereas earlier SSI observations and models provided a qualitatively consistent picture of the SSI variability, recent measurements by the SORCE satellite suggest a significantly stronger variability in the ultraviolet (UV) spectral range and changes in the visible and near-infrared (NIR) bands in anti-phase with the solar cycle. A number of recent chemistry-climate model (CCM) simulations have shown that this might have significant implications on the Earth's atmosphere. Motivated by these results, we summarize here our current knowledge of SSI variability and its impact on Earth's climate. We present a detailed overview of existing SSI measurements and provide thorough comparison of models available to date. SSI changes influence the Earth's atmosphere, both directly, through changes in shortwave (SW) heating and therefore, temp...

Ermolli, I; de Wit, T Dudok; Krivova, N A; Tourpali, K; Weber, M; Unruh, Y C; Gray, L; Langematz, U; Pilewskie, P; Rozanov, E; Schmutz, W; Shapiro, A; Solanki, S K; Woods, T N

2013-01-01T23:59:59.000Z

163

Solar access of residential rooftops in four California cities  

E-Print Network (OSTI)

uence of cloudy weather on direct solar irradiance (Figurenormal solar irradiances values contained in the weather ?

Levinson, Ronnen

2010-01-01T23:59:59.000Z

164

Prediction and measurement of direct-normal solar irradiance: A closure experiment  

Science Conference Proceedings (OSTI)

Direct-normal solar irradiance (DNSI), the total energy in the solar spectrum incident on a plane perpendicular to the Sun`s direction on a unit area at the earth`s surface in unit time, depends only on the atmospheric extinction of sunlight without regard to the details of extinction--whether absorption or scattering. Here the authors describe a set of closure experiments performed in north-central Oklahoma, wherein measured atmospheric composition is input to a radiative transfer model, MODTRAN-3, to predict DNSI, which is then compared to measured values. Thirty six independent comparisons are presented; the agreement between predicted and measured values falls within the combined uncertainties in the prediction (2%) and measurement (0.2%) albeit with a slight bias ({approximately} 1% overprediction) that is independent of the solar zenith angle. Thus these results establish the adequacy of current knowledge of the solar spectrum and atmospheric extinction as embodied in MODTRAN-3 for use in climate models. An important consequence is the overwhelming likelihood that the atmospheric clear-sky absorption is accurately described to within comparable uncertainties.

Halthore, R.N.; Schwartz, S.E. [Brookhaven National Lab., Upton, NY (United States); Michalsky, J.J. [State Univ. of New York, Albany, NY (United States); Anderson, G.P. [Hanscomb AFB (United States); Ferrare, R.A. [National Aeronautics and Space Administration, Greenbelt, MD (United States). Goddard Space Flight Center; Ten Brink, H.M. [Energy Research Inst. (Netherlands)

1997-03-01T23:59:59.000Z

165

Intra-hour Direct Normal Irradiance solar forecasting using genetic programming  

E-Print Network (OSTI)

E. Ruano, Prediction of the solar radiation evolution usingComputation of beam solar radiation at normal incidencein estimating global solar radiation, Solar Energy, vol.

Queener, Benjamin Daniel

2012-01-01T23:59:59.000Z

166

Solar: monthly and annual average latitude tilt irradiance GIS data at  

Open Energy Info (EERE)

irradiance GIS data at irradiance GIS data at one-degree resolution of the World from NASA/SSE Dataset Summary Description (Abstract): Latitude Tilt Irradiance NASA Surface meteorology and Solar Energy (SSE) Release 6.0 Data Set (Jan 2008)22-year Monthly & Annual Average (July 1983 - June 2005) Parameter: Latitude Tilt Radiation (kWh/m^2/day) Internet: http://eosweb.larc.nasa.gov/sse/ Note 1: SSE Methodology & Accuracy sections online Note 2: Lat/Lon values indicate the lower left corner of a 1x1 degree region. Negative values are south and west; positive values are north and east. Boundaries of the -90/-180 region are -90 to -89 (south) and -180 to -179 (west). The last region, 89/180, is bounded by 89 to 90 (north) and 179 to 180 (east). The mid-point of the region is +0.5 added to the the Lat/Lon value. These data are regional averages; not point data.

167

Solar: monthly and annual average direct normal irradiance GIS data at  

Open Energy Info (EERE)

irradiance GIS data at irradiance GIS data at one-degree resolution of the World from NASA/SSE Dataset Summary Description (Abstract): Direct Normal Irradiance (kWh/m^2/day)NASA Surface meteorology and Solar Energy (SSE) Release 6.0 Data Set (Jan 2008)22-year Monthly & Annual Average (July 1983 - June 2005) Parameter: Direct Normal Radiation (kWh/m^2/day) Internet: http://eosweb.larc.nasa.gov/sse/ Note 1: SSE Methodology & Accuracy sections online Note 2: Lat/Lon values indicate the lower left corner of a 1x1 degree region. Negative values are south and west; positive values are north and east. Boundaries of the -90/-180 region are -90 to -89 (south) and -180 to -179 (west). The last region, 89/180, is bounded by 89 to 90 (north) and 179 to 180 (east). The mid-point of the region is +0.5 added to the the Lat/Lon value. These data are

168

Comparison of model estimated and measured direct-normal solar irradiance  

SciTech Connect

Direct-normal solar irradiance (DNSI), the energy in the solar spectrum incident in unit time at the Earth{close_quote}s surface on a unit area perpendicular to the direction to the Sun, depends only on atmospheric extinction of solar energy without regard to the details of the extinction, whether absorption or scattering. Here we report a set of closure experiments performed in north central Oklahoma in April 1996 under cloud-free conditions, wherein measured atmospheric composition and aerosol optical thickness are input to a radiative transfer model, MODTRAN 3, to estimate DNSI, which is then compared with measured values obtained with normal incidence pyrheliometers and absolute cavity radiometers. Uncertainty in aerosol optical thickness (AOT) dominates the uncertainty in DNSI calculation. AOT measured by an independently calibrated Sun photometer and a rotating shadow-band radiometer agree to within the uncertainties of each measurement. For 36 independent comparisons the agreement between measured and model-estimated values of DNSI falls within the combined uncertainties in the measurement (0.3{endash}0.7{percent}) and model calculation (1.8{percent}), albeit with a slight average model underestimate ({minus}0.18{plus_minus}0.94){percent}; for a DNSI of 839Wm{sup {minus}2} this corresponds to {minus}1.5{plus_minus}7.9Wm{sup {minus}2}. The agreement is nearly independent of air mass and water-vapor path abundance. These results thus establish the accuracy of the current knowledge of the solar spectrum, its integrated power, and the atmospheric extinction as a function of wavelength as represented in MODTRAN 3. An important consequence is that atmospheric absorption of short-wave energy is accurately parametrized in the model to within the above uncertainties. {copyright} 1997 American Geophysical Union

Halthore, R.N.; Schwartz, S.E. [Department of Applied Science, Brookhaven National Laboratory, Upton, New York (United States)] [Department of Applied Science, Brookhaven National Laboratory, Upton, New York (United States); Michalsky, J.J. [Atmospheric Sciences Research Center, State University of New York at Albany (United States)] [Atmospheric Sciences Research Center, State University of New York at Albany (United States); Anderson, G.P. [Phillips Laboratory/Geophysics Directorate, Hanscom Air Force Base, Massachusetts (United States)] [Phillips Laboratory/Geophysics Directorate, Hanscom Air Force Base, Massachusetts (United States); Ferrare, R.A. [Hughes STX Corporation, Lanham, Maryland (United States)] [Hughes STX Corporation, Lanham, Maryland (United States); Holben, B.N. [NASA Goddard Space Flight Center, Greenbelt, Maryland (United States)] [NASA Goddard Space Flight Center, Greenbelt, Maryland (United States); Ten Brink, H.M. [Netherlands Energy Research Foundation, ECN, Petten (Netherlands)] [Netherlands Energy Research Foundation, ECN, Petten (Netherlands)

1997-12-01T23:59:59.000Z

169

latitutde tilt irradiance | OpenEI  

Open Energy Info (EERE)

latitutde tilt irradiance latitutde tilt irradiance Dataset Summary Description (Abstract): Monthly Average Solar Resource for flat-plate collectors tilted at latitude for Bangladesh. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented due south at an angle from horizontal equal to the latitude of the collector location. Source NREL Date Released April 12th, 2005 (9 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords atmospheric water vapor GEF GIS latitutde tilt irradiance NREL solar SWERA TILT UNEP Data text/csv icon Download Data (csv, 35.5 KiB) application/zip icon Download Shapefile (zip, 26.7 KiB) Quality Metrics

170

Comparison of Ocean Surface Solar Irradiance in the GLA General Circulation Model and Satellite-based Calculations  

Science Conference Proceedings (OSTI)

A global, 7-year satellite-based record of ocean surface solar irradiance (SSI) is used to assess the realism of ocean SSI simulated by the nine-layer Goddard Laboratory for Atmospheres (GLA) General Circulation Model (GCM). January and July ...

Beth Chertock; Y. C. Sud

1993-03-01T23:59:59.000Z

171

Global Monitoring of Net Solar Irradiance at the Ocean Surface: Climatological Variability and the 19821983 El Nio  

Science Conference Proceedings (OSTI)

A new method has been used to generate the first satellite-based long-term climatology of surface solar irradiance over the world oceans. These monthly mean data cover the period November 1978 through October 1985 on a global, 9 latitude-...

Beth Chertock; Robert Frouin; Richard C. J. Somerville

1991-06-01T23:59:59.000Z

172

GEOPHYSICAL RESEARCH LETTERS, VOL. 26, NO. 9, PAGES 1255-1258, MAY 1, 1999 Measurements of the solar soft x-ray irradiance  

E-Print Network (OSTI)

. Introduction Solar soft x-ray ( energy is deposited into the lower thermosphere at altitudes between values of bandpass integrated energy flux are reported. For the present analysis, the SC#21REFW solar of the solar soft x-ray irradiance from the Student Nitric Oxide Explorer Scott M. Bailey Center

Bailey, Scott

173

High Resolution Solar Energy Resource Assessment within the UNEP Project  

Open Energy Info (EERE)

High Resolution Solar Energy Resource Assessment within the UNEP Project High Resolution Solar Energy Resource Assessment within the UNEP Project SWERA Dataset Summary Description (Abstract): To expand the world wide use of renewable energy a consistent, reliable, verifiable, and easily accessible database of solar energy resources is needed. Within the UNEP (United Nations Environment Programme) Project SWERA (Solar and Wind Energy Resource Assessment, http://swera.unep.net), funded by GEF (Global Environment Facility), a global database of solar and wind energy resources will be set up. SWERA will provide, beside the wind products, global horizontal irradiance, which is mostly used to plan photovoltaic systems, and direct normal irradiance, which is needed for solar concentrating systems. For selected countries throughout the world, additionally high resolution data will be produced which is required to plan solar energy systems in detail. Within SWERA, the partners DLR, SUNY and INPE calculate solar irradiance with high temporal resolution of 1 hour and with a spatial resolution of 10km x 10km. By processing data from geostationary satellites we provide solar irradiance data for Cuba, El Salvador, Honduras, Nicaragua, Guatemala, Brazil, Ghana, Ethiopia, Kenya, China, Sri Lanka, Nepal, and Bangladesh. In this paper we describe the ongoing work of developing this high resolution solar irradiance tx_metadatatool and cross-checking of the used solar irradiance algorithms for various satellite data.

174

Modeling Total Solar Irradiance Variations Using Automated Classification Software on Mount Wilson Data  

E-Print Network (OSTI)

S. , Joukoff, A. : 2004, Solar Phys. 224, 209. Djafer, D. ,a, S. , Egidi, A. : 2008, Solar Phys. 247, 225. Fazel, Z. ,Bernasconi, P.N. : 2008, Solar Phys. 248, 1. Foukal, P. ,

Ulrich, R. K.; Parker, D.; Bertello, L.; Boyden, J.

2010-01-01T23:59:59.000Z

175

Field Results from a Second-Generation Ocean/Lake Surface Contact Heat Flux, Solar Irradiance, and Temperature Measurement InstrumentThe Multisensor Float  

Science Conference Proceedings (OSTI)

This paper describes results from two field programs that support development of a wave-following surface contact multisensor float (MSF) designed to simultaneously measure net surface heat flux, net solar irradiance, and water temperature. The ...

J. P. Boyle

2007-05-01T23:59:59.000Z

176

Interannual Variability of Solar Irradiance over the Amazon Basin Including the 19827ndash;83 El Ni7ntilde;o Year  

Science Conference Proceedings (OSTI)

Surface solar irradiance (SW?) was derived over the extended Amazon Basin using AVHRR observations from polar-orbiting satellites during four July months (19831986). Observations from the geostationary satellite GOES for July 1983 were also used ...

R. T. Pinker; I. Laszlo

1992-11-01T23:59:59.000Z

177

Modeling Total Solar Irradiance Variations Using Automated Classification Software on Mount Wilson Data  

E-Print Network (OSTI)

S.K. (eds. ) The Sun as a Variable Star: Solar and Stellartube and the quiet Sun and a particular solar surface pixelsolar surface allow the construction of images of the Sun as

Ulrich, R. K.; Parker, D.; Bertello, L.; Boyden, J.

2010-01-01T23:59:59.000Z

178

Multi-facet concentrator of solar setup for irradiating the objects placed in a target plane with solar light  

DOE Patents (OSTI)

According to the proposed invention, this technical result is achieved so that many-facet concentrator of a solar setup for exposure of objects, placed in a target plane, to the action of solar radiation containing a supporting frame and facets differing by that the facets of the concentrator are chosen with spherical focusing reflective surfaces of equal focal lengths and with selective coatings reflecting a desired spectral fraction of solar radiation, and are arranged on the supporting frame symmetrically with respect to the common axis of the concentrator, their optical axes being directed to the single point on the optical axis of the concentrator located before the nominal focus point of the concentrator and determining the position of arranging the target plane.

Lewandowski, Allan A. (Evergreen, CO); Yampolskiy, Vladislav (Moscow, RU); Alekseev, Valerie (Moscow, RU); Son, Valentin (Moscow, RU)

2001-01-01T23:59:59.000Z

179

Measuring solar reflectance - Part I: Defining a metric that accurately predicts solar heat gain  

Science Conference Proceedings (OSTI)

Solar reflectance can vary with the spectral and angular distributions of incident sunlight, which in turn depend on surface orientation, solar position and atmospheric conditions. A widely used solar reflectance metric based on the ASTM Standard E891 beam-normal solar spectral irradiance underestimates the solar heat gain of a spectrally selective ''cool colored'' surface because this irradiance contains a greater fraction of near-infrared light than typically found in ordinary (unconcentrated) global sunlight. At mainland US latitudes, this metric R{sub E891BN} can underestimate the annual peak solar heat gain of a typical roof or pavement (slope {roofs in a building energy simulation can exaggerate the economic value N of annual cool roof net energy savings by as much as 23%. We define clear sky air mass one global horizontal (''AM1GH'') solar reflectance R{sub g,0}, a simple and easily measured property that more accurately predicts solar heat gain. R{sub g,0} predicts the annual peak solar heat gain of a roof or pavement to within 2 W m{sup -2}, and overestimates N by no more than 3%. R{sub g,0} is well suited to rating the solar reflectances of roofs, pavements and walls. We show in Part II that R{sub g,0} can be easily and accurately measured with a pyranometer, a solar spectrophotometer or version 6 of the Solar Spectrum Reflectometer. (author)

Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul [Heat Island Group, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720 (United States)

2010-09-15T23:59:59.000Z

180

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

E-Print Network (OSTI)

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

Nicola Scafetta; Richard C. Willson

2013-11-26T23:59:59.000Z

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


181

A 24-h forecast of solar irradiance using artificial neural network: Application for performance prediction of a grid-connected PV plant at Trieste, Italy  

Science Conference Proceedings (OSTI)

Forecasting of solar irradiance is in general significant for planning the operations of power plants which convert renewable energies into electricity. In particular, the possibility to predict the solar irradiance (up to 24 h or even more) can became - with reference to the Grid Connected Photovoltaic Plants (GCPV) - fundamental in making power dispatching plans and - with reference to stand alone and hybrid systems - also a useful reference for improving the control algorithms of charge controllers. In this paper, a practical method for solar irradiance forecast using artificial neural network (ANN) is presented. The proposed Multilayer Perceptron MLP-model makes it possible to forecast the solar irradiance on a base of 24 h using the present values of the mean daily solar irradiance and air temperature. An experimental database of solar irradiance and air temperature data (from July 1st 2008 to May 23rd 2009 and from November 23rd 2009 to January 24th 2010) has been used. The database has been collected in Trieste (latitude 45 40'N, longitude 13 46'E), Italy. In order to check the generalization capability of the MLP-forecaster, a K-fold cross-validation was carried out. The results indicate that the proposed model performs well, while the correlation coefficient is in the range 98-99% for sunny days and 94-96% for cloudy days. As an application, the comparison between the forecasted one and the energy produced by the GCPV plant installed on the rooftop of the municipality of Trieste shows the goodness of the proposed model. (author)

Mellit, Adel [Department of Electronics, Faculty of Sciences and Technology, LAMEL, Jijel University, Ouled-aissa, P.O. Box 98, Jijel 18000 (Algeria); Pavan, Alessandro Massi [Department of Materials and Natural Resources, University of Trieste Via A. Valerio, 2 - 34127 Trieste (Italy)

2010-05-15T23:59:59.000Z

182

Paper presented at the EUMETSAT Conference Sept. 2010 Cordoba SPECTRALLY RESOLVED SOLAR IRRADIANCE DERIVED FROM  

E-Print Network (OSTI)

solar power data sets . . . 85 4.1 A naive attempt at matching supply and demand by considering only PV of harvested-energy. An effective approach for evaluating the accuracy of solar energy prediction algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 2.2.6 PV Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 2.2.7 Input

Heinemann, Detlev

183

Ecological Modelling 143 (2001) 227243 A globally applicable model of daily solar irradiance  

E-Print Network (OSTI)

. At Luquillo, Puerto Rico, the daily atmospheric transmittance for solar radiation was approximately equal incoming radiation. This sensi- tivity depends upon the local partitioning of solar energy that varies, nearly linear relationship between ~ and daily average relative humidity (rhave) at Luquillo, Puerto Rico

Hunt Jr., E. Raymond

184

Solar  

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

The U.S. Department of Energy (DOE) leads a large network of researchers and other partners to deliver innovative solar photovoltaic and concentrating solar power technologies that will make solar...

185

Monthly average clear-sky broadband irradiance database for worldwide solar heat gain and building cooling load calculations  

Science Conference Proceedings (OSTI)

This paper establishes the formulation of a new clear-sky solar radiation model appropriate for algorithms calculating cooling loads in buildings. The aim is to replace the ASHRAE clear-sky model of 1967, whose limitations are well known and are reviewed. The new model is derived in two steps. The first step consists of obtaining a reference irradiance dataset from the REST2 model, which uses a high-performance, validated, two-band clear-sky algorithm. REST2 requires detailed inputs about atmospheric conditions such as aerosols, water vapor, ozone, and ground albedo. The development of global atmospheric datasets used as inputs to REST2 is reviewed. For the most part, these datasets are derived from space observations to guarantee universality and accuracy. In the case of aerosols, point-source terrestrial measurements were also used as ground truthing of the satellite data. The second step of the model consists of fits derived from a REST2-based reference irradiance dataset. These fits enable the derivation of compact, but relatively accurate expressions, for beam and diffuse clear-sky irradiance. The fitted expressions require the tabulation of only two pseudo-optical depths for each month of the year. The resulting model, and its tabulated data, are expected to be incorporated in the 2009 edition of the ASHRAE Handbook of Fundamentals. (author)

Gueymard, Christian A. [Solar Consulting Services, P.O. Box 392, Colebrook, NH 03576 (United States); Thevenard, Didier [Numerical Logics Inc., 498 Edenvalley Cres., Waterloo, Ont. (Canada)

2009-11-15T23:59:59.000Z

186

NREL Solar Radiation Research Laboratory (SRRL): Baseline Measurement System (BMS); Golden, Colorado (Data)  

DOE Data Explorer (OSTI)

The SRRL was established at the Solar Energy Research Institute (now NREL) in 1981 to provide continuous measurements of the solar resources, outdoor calibrations of pyranometers and pyrheliometers, and to characterize commercially available instrumentation. The SRRL is an outdoor laboratory located on South Table Mountain, a mesa providing excellent solar access throughout the year, overlooking Denver. Beginning with the basic measurements of global horizontal irradiance, direct normal irradiance and diffuse horizontal irradiance at 5-minute intervals, the SRRL Baseline Measurement System now produces more than 130 data elements at 1-min intervals that are available from the Measurement & Instrumentation Data Center Web site. Data sources include global horizontal, direct normal, diffuse horizontal (from shadowband and tracking disk), global on tilted surfaces, reflected solar irradiance, ultraviolet, infrared (upwelling and downwelling), photometric and spectral radiometers, sky imagery, and surface meteorological conditions (temperature, relative humidity, barometric pressure, precipitation, snow cover, wind speed and direction at multiple levels). Data quality control and assessment include daily instrument maintenance (M-F) with automated data quality control based on real-time examinations of redundant instrumentation and internal consistency checks using NREL's SERI-QC methodology. Operators are notified of equipment problems by automatic e-mail messages generated by the data acquisition and processing system. Radiometers are recalibrated at least annually with reference instruments traceable to the World Radiometric Reference (WRR).

Stoffel, T.; Andreas, A.

187

Solar Spectral Irradiance under Clear Skies around a Major Metropolitan Area  

Science Conference Proceedings (OSTI)

This paper investigates the influence of gaseous pollutants and aerosol on the spectral composition of various segments of the solar spectrum in cloudless conditions. This investigation is done by using data of the spectral energy distribution of ...

C. P. Jacovides; Michael D. Steven; D. N. Asimakopoulos

2000-06-01T23:59:59.000Z

188

Solar Irradiance and Effective Brightness Temperature for SWIR Channels of AVHRR/NOAA and GOES Imagers  

Science Conference Proceedings (OSTI)

Satellite observations in the shortwave infrared (SWIR) part of spectrum between 3.5 and 4.0 ?m deliver critically important information for many applications. The satellite signal in this spectral band consists of solar-reflected radiation and ...

Alexander P. Trishchenko

2006-02-01T23:59:59.000Z

189

NREL: Photovoltaics Research - Updated Solar Resource Maps Available for  

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

Updated Solar Resource Maps Available for India Updated Solar Resource Maps Available for India July 15, 2013 Through funding from the U.S. Department of Energy and U.S. Department of State, and in collaboration with India's Ministry of New and Renewable Energy, NREL has updated its 10-kilometer (km) solar resource maps for India. The new maps incorporate updated 10-km hourly solar resource data developed using weather satellite measurements combined with site-time specific solar modeling. Additionally, the maps expand the time of analysis by four years, from 2002-2007 to 2002-2011 and include enhanced aerosols information to improve estimates of direct normal irradiance. The data is available in both geographic information system and static map formats on NREL's website for both global horizontal irradiance and

190

NREL: Technology Deployment - Updated Solar Resource Maps Available for  

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

Updated Solar Resource Maps Available for India Updated Solar Resource Maps Available for India July 15, 2013 Through funding from the U.S. Department of Energy and U.S. Department of State, and in collaboration with India's Ministry of New and Renewable Energy, NREL has updated its 10-kilometer (km) solar resource maps for India. The new maps incorporate updated 10-km hourly solar resource data developed using weather satellite measurements combined with site-time specific solar modeling. Additionally, the maps expand the time of analysis by four years, from 2002-2007 to 2002-2011 and include enhanced aerosols information to improve estimates of direct normal irradiance. The data is available in both geographic information system and static map formats on NREL's website for both global horizontal irradiance and

191

LABORATORY STUDIES ON THE IRRADIATION OF METHANE IN INTERSTELLAR, COMETARY, AND SOLAR SYSTEM ICES  

E-Print Network (OSTI)

(-particles, He2+ ). The cosmic-ray particles also induce an internal ultraviolet radiation field (k -energy radiation exposure over the lifetime of an interstellar cloud of about 4Y6ð ? ; 108 yr (Jones 2005 molecular hydrogen, the sole species detected in the gas phase during the irradiation exposure

Kaiser, Ralf I.

192

Solar forecasting review  

E-Print Network (OSTI)

Online 24-h solar power forecasting based on weather typeweather observations at blue hill massachusetts, Solarof weather patterns on the intensity of solar irradiance;

Inman, Richard Headen

2012-01-01T23:59:59.000Z

193

Optimal measurement of surface shortwave irradiance using current instrumentation -- the ARM experience  

Science Conference Proceedings (OSTI)

Shortwave (solar) measurements of surface irradiance for clear sky conditions disagree with a number of different models. Betts used the European Center for Medium-range Forecasts (ECMWF) shortwave model to calculate surface irradiance that were 5-10 percent higher than measurements. Wild used a different formulation of the ECMWF shortwave model, but found that the model overpredicted clear-sky shortwave and average of 3 percent. Ding and Wang used data from the Atmospheric Radiation Measurement (ARM) program and found that the GENESIS GCM shortwave model, likewise, overpredicted clear-sky irradiance by about 4 percent. To help resolve the measurement dilemma, reference instruments were deployed in April 1996 at the Southern Great Plains ARM site central facility very near the shortwave measurements. The rest of the paper describes the experiment undertaken to ascertain total horizontal shortwave irradiance at the surface, including a separation of the direct normal and diffuse horizontal components. Results and a discussion of same concludes the paper.

Michalsky, J. [State Univ. of New York, Albany, NY (United States). Atmospheric Sciences Research Center; Rubes, M. [Colorado Univ., Boulder, CO (United States). Cooperative Inst. for Research in Environmental Sciences; Stoffel, T. [National Renewable Energy Lab., Golden, CO (United States); Wesley, M. [Argonne National Lab., IL (United States). Environmental Research Div.; Splitt, M. [Oklahoma Univ., Norman, OK (United States); DeLuisi, J. [National Oceanic and Atmospheric Administration, Boulder, CO (United States)

1997-03-01T23:59:59.000Z

194

Can a Nanoflare Model of EUV Irradiances Describe the Heating of the Solar Corona?  

E-Print Network (OSTI)

Nanoflares, the basic unit of impulsive energy release may produce much of the solar background emission. Extrapolation of the energy frequency distribution of observed microflares, which follows a power law to lower energies can give an estimation of the importance of nanoflares for heating the solar corona. If the power law index is greater than 2, then the nanoflare contribution is dominant. We model time series of extreme ultraviolet emission radiance, as random flares with a power law exponent of the flare event distribution. The model is based on three key parameters, the flare rate, the flare duration and the power law exponent of the flare intensity frequency distribution. We use this model to simulate emission line radiance detected in 171 \\AA, observed by STEREO/EUVI and SDO/AIA. The Observed light curves are matched with simulated light curves using an Artificial Neural Network and parameter values are determined across regions of active region, quiet sun, and coronal hole. The damping rate of nano...

Tajfirouze, E; 10.1088/0004-637X/744/2/113

2011-01-01T23:59:59.000Z

195

Horizontal Plate Plate  

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

potential for the lower 48 states Purpose: Provide information on the solar resource potential for the lower 48 states. The insolation values represent the average solar energy...

196

Solar Hydrogen Conversion Background  

E-Print Network (OSTI)

Solar Hydrogen Conversion Background: The photoelectrochemical production of hydrogen has drawn properties In order to develop better materials for solar energy applications, in-depth photoelectrochemical simulated solar irradiance. Hydrogen production experiments are conducted in a sealed aluminum cell

Raftery, Dan

197

ARM Multi-Filter Rotating Shadowband Radiometer (MFRSR): irradiances  

DOE Data Explorer (OSTI)

The multifilter rotating shadowband radiometer (MFRSR) takes spectral measurements of direct normal, diffuse horizontal and total horizontal solar irradiances. These measurements are at nominal wavelengths of 415, 500, 615, 673, 870, and 940 nm. The measurements are made at a user-specified time interval, usually about one minute or less. The sampling rate for the Atmospheric Radiation Measurement (ARM) Climate Research Facility MFRSRs is 20 seconds. From such measurements, one may infer the atmosphere's optical depth at the wavelengths mentioned above. In turn, these optical depths may be used to derive information about the column abundances of ozone and water vapor (Michalsky et al. 1995), as well as aerosol (Michalsky et al. 1994) and other atmospheric constituents. A silicon detector is also part of the MFRSR. This detector provides a measure of the broadband direct normal, diffuse horizontal and total horizontal solar irradiances. A MFRSR head that is mounted to look vertically downward can measure upwelling spectral irradiances. In the ARM system, this instrument is called a multifilter radiometer (MFR). At the Southern Great Plains (SGP) there are two MFRs; one mounted at the 10-m height and the other at 25 m. At the North Slope of Alaska (NSA) sites, the MFRs are mounted at 10 m. MFRSR heads are also used to measure normal incidence radiation by mounting on a solar tracking device. These are referred to as normal incidence multi-filter radiometers (NIMFRs) and are located at the SGP and NSA sites. Another specialized use for the MFRSR is the narrow field of view (NFOV) instrument located at SGP. The NFOV is a ground-based radiometer (MFRSR head) that looks straight up.

Hodges, Gary

198

Documentation of high resolution solar resource assessment for Sri Lanka  

Open Energy Info (EERE)

Sri Lanka Sri Lanka provided by DLR Dataset Summary Description (Abstract): Documentation of the satellite-based high resolution solar resource assessment for Sri Lanka provided by DLR. The high resolution solar data (10kmx10km) provide country maps of the annual and monthly sums of hourly global horizontal and direct normal irradiance (GHI and DNI) for the year 2000, 2002 and 2003. Additionally, for selected sites hourly values of GHI and DNI are provided.The Documentation gives an overview about the used input data and used methodology, shows example maps and describes a comparison with ground data (if provided by the country) (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. For the selected sites, the hourly time series can be used for the simulation of Photovoltaic (PV)-systems or Concentrating Solar Power (CSP)-systems.

199

Measuring solar reflectance Part I: Defining a metric that accurately predicts solar heat gain  

SciTech Connect

Solar reflectance can vary with the spectral and angular distributions of incident sunlight, which in turn depend on surface orientation, solar position and atmospheric conditions. A widely used solar reflectance metric based on the ASTM Standard E891 beam-normal solar spectral irradiance underestimates the solar heat gain of a spectrally selective 'cool colored' surface because this irradiance contains a greater fraction of near-infrared light than typically found in ordinary (unconcentrated) global sunlight. At mainland U.S. latitudes, this metric RE891BN can underestimate the annual peak solar heat gain of a typical roof or pavement (slope {le} 5:12 [23{sup o}]) by as much as 89 W m{sup -2}, and underestimate its peak surface temperature by up to 5 K. Using R{sub E891BN} to characterize roofs in a building energy simulation can exaggerate the economic value N of annual cool-roof net energy savings by as much as 23%. We define clear-sky air mass one global horizontal ('AM1GH') solar reflectance R{sub g,0}, a simple and easily measured property that more accurately predicts solar heat gain. R{sub g,0} predicts the annual peak solar heat gain of a roof or pavement to within 2 W m{sup -2}, and overestimates N by no more than 3%. R{sub g,0} is well suited to rating the solar reflectances of roofs, pavements and walls. We show in Part II that R{sub g,0} can be easily and accurately measured with a pyranometer, a solar spectrophotometer or version 6 of the Solar Spectrum Reflectometer.

Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul

2010-05-14T23:59:59.000Z

200

Measuring solar reflectance Part I: Defining a metric that accurately predicts solar heat gain  

SciTech Connect

Solar reflectance can vary with the spectral and angular distributions of incident sunlight, which in turn depend on surface orientation, solar position and atmospheric conditions. A widely used solar reflectance metric based on the ASTM Standard E891 beam-normal solar spectral irradiance underestimates the solar heat gain of a spectrally selective 'cool colored' surface because this irradiance contains a greater fraction of near-infrared light than typically found in ordinary (unconcentrated) global sunlight. At mainland U.S. latitudes, this metric RE891BN can underestimate the annual peak solar heat gain of a typical roof or pavement (slope {le} 5:12 [23{sup o}]) by as much as 89 W m{sup -2}, and underestimate its peak surface temperature by up to 5 K. Using R{sub E891BN} to characterize roofs in a building energy simulation can exaggerate the economic value N of annual cool-roof net energy savings by as much as 23%. We define clear-sky air mass one global horizontal ('AM1GH') solar reflectance R{sub g,0}, a simple and easily measured property that more accurately predicts solar heat gain. R{sub g,0} predicts the annual peak solar heat gain of a roof or pavement to within 2 W m{sup -2}, and overestimates N by no more than 3%. R{sub g,0} is well suited to rating the solar reflectances of roofs, pavements and walls. We show in Part II that R{sub g,0} can be easily and accurately measured with a pyranometer, a solar spectrophotometer or version 6 of the Solar Spectrum Reflectometer.

Levinson, Ronnen; Akbari, Hashem; Berdahl, Paul

2010-05-14T23:59:59.000Z

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


201

DOI: 10.1051/swsc/2012016 Owned by the authors, Published by EDP Sciences 2012 New observation strategies for the solar UV spectral irradiance  

E-Print Network (OSTI)

Many applications in space weather and in space situational awareness require continuous solar spectral irradiance measurements in the UV, and to a lesser degree in the visible band. Most space-borne solar radiometers are made out of two different parts: (i) a front filter that selects the passband and (ii) a detector that is usually based on silicon technology. Both are prone to degradation, which may be caused either by the degradation of the filter coating due to local deposition or to structural changes, or by the degradation of the silicon detector by solar radiative and energetic particle fluxes. In this study, we provide a theoretical analysis of the filter degradation that is caused by structural changes such as pinholes; contamination-induced degradation will not be considered. We then propose a new instrumental concept, which is expected to overcome, at least partially, these problems. We show how most of the solar UV spectrum can be reconstructed from the measurement of only five spectral bands. This instrumental concept outperforms present spectrometers in terms of degradation. This new concept in addition overcomes the need for silicon-based detectors, which are replaced by wide band gap material detectors. Front filters, which can contribute to in-flight degradation, therefore are not required, except for the extreme-UV (EUV) range. With a small weight and a low telemetry, this concept may also have applications in solar physics, in astrophysics and in planetology.

Gal Cessateur; Jean Lilensten; Thierry Dudok De Wit; Ali Benmoussa; Matthieu Kretzschmar

2012-01-01T23:59:59.000Z

202

Directly-irradiated Two-zone Solar Thermochemical Reactor for H2O/CO2 Splitting  

other fossil fuels, as well as the emission of greenhouse gases. Current solar thermochemical approaches are greatly restricted by the efficiency of the reactor, which is less than one percent. This solar thermochemical reactor has the potential ...

203

Surface Solar Irradiance in the Central Pacific during Tropic Heat: Comparisons between in Situ Measurements and Satellite Estimates  

Science Conference Proceedings (OSTI)

We present the first results concerning solar radiation at the ocean surface during the Tropic Heat experiment. Using calibrated GOES visible brightness measurements, a simple radiative transfer model calculates hourly and daily surface solar ...

Catherine Gautier

1988-06-01T23:59:59.000Z

204

ARM - Measurement - Horizontal wind  

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

govMeasurementsHorizontal wind govMeasurementsHorizontal wind ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Horizontal wind The horizontal wind in terms of either speed and direction, or the zonal (u) and meridional (v) components. Categories Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments SONDE : Balloon-Borne Sounding System CO2FLX : Carbon Dioxide Flux Measurement Systems ECOR : Eddy Correlation Flux Measurement System DISDROMETER : Impact Disdrometer

205

Nonlinear Horizontal Diffusion for GCMs  

Science Conference Proceedings (OSTI)

The mixing-length-based parameterization of horizontal diffusion, which was originally proposed by Smagorinsky, is revisited. The complete tendencies of horizontal momentum diffusion, the associated frictional heating, and horizontal diffusion of ...

Erich Becker; Ulrike Burkhardt

2007-04-01T23:59:59.000Z

206

ECOLOGICAL CONSIDERATIONS OF THE SOLAR ALTERNATIVE  

E-Print Network (OSTI)

J. F. , and Kreith, T. , Solar Heating and Cooling, McGraw-horizontal axis machines. E. Solar Heating and cooling10 ,11Instead of the active solar heating and cooling described

Davidson, M.

2010-01-01T23:59:59.000Z

207

Horizontal Advanced Tensiometer  

DOE Patents (OSTI)

An horizontal advanced tensiometer is described that allows the monitoring of the water pressure of soil positions, particularly beneath objects or materials that inhibit the use of previous monitoring wells. The tensiometer includes a porous cup, a pressure transducer (with an attached gasket device), an adaptive chamber, at least one outer guide tube which allows access to the desired horizontal position, a transducer wire, a data logger and preferably an inner guide tube and a specialized joint which provides pressure on the inner guide tube to maintain the seal between the gasket of the transducer and the adaptive chamber.

Hubbell, Joel M.; Sisson, James B.

2004-06-22T23:59:59.000Z

208

Documentation of high resolution solar resource assessment (10km) for  

Open Energy Info (EERE)

for for Ethiopia provided by DLR Dataset Summary Description (Abstract): Documentation of the satellite-based high resolution solar resource assessment for Ethiopia provided by DLR. The high resolution solar data (10kmx10km) provide country maps of the annual and monthly sums of hourly global horizontal and direct normal irradiance (GHI and DNI) for the year 2000, 2001 and 2002. Additionally, for selected sites hourly values of GHI and DNI are provided.The Documentation gives an overview about the used input data and used methodology, shows example maps and describes a comparison with ground data (if provided by the country) (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. For the selected

209

Documentation of high resolution solar resource assessment for Ghana  

Open Energy Info (EERE)

Ghana Ghana provided by DLR Dataset Summary Description (Abstract): Documentation of the satellite-based high resolution solar resource assessment for Ghana provided by DLR. The high resolution solar data (10kmx10km) provide country maps of the annual and monthly sums of hourly global horizontal and direct normal irradiance (GHI and DNI) for the year 2000, 2001 and 2002. Additionally, for selected sites hourly values of GHI and DNI are provided.The Documentation gives an overview about the used input data and used methodology, shows example maps and describes a comparison with ground data (if provided by the country) (Purpose): The data are helpful for the assessment of the solar potential of the country and can give projet developer a first impression of the solar resource of the country. For the selected

210

Spectral UV Measurements of Global Irradiance, Solar Radiance, and Actinic Flux in New Zealand: Intercomparison between Instruments and Model Calculations  

Science Conference Proceedings (OSTI)

Presented here are the results of a short but intense measurement campaign at Lauder, New Zealand, in which spectral irradiance from instruments operated by the National Institute of Water and Atmospheric Research (NIWA) and Austria/Innsbruck (...

Mario Blumthaler; Barbara Schallhart; Michael Schwarzmann; Richard McKenzie; Paul Johnston; Michael Kotkamp; Hisako Shiona

2008-06-01T23:59:59.000Z

211

A High-Resolution Topographic Correction Method for Clear-Sky Solar Irradiance Derived with a Numerical Weather Prediction Model  

Science Conference Proceedings (OSTI)

Rugged terrain is a source of variability in the incoming solar radiation field, but the influence of terrain is still not properly included by most current numerical weather prediction (NWP) models. In this work, a downscaling postprocessing ...

Jos A. Ruiz-Arias; David Pozo-Vzquez; Vicente Lara-Fanego; Francisco J. Santos-Alamillos; J. Tovar-Pescador

2011-12-01T23:59:59.000Z

212

& REFLE TED SOLAR IRRADIAN E TE HNOLOGY READINESS LEVEL 9  

using a digital camera. Measurements of reflected solar irradiance is of great importance to industry, military,

213

Cementing horizontal wells  

SciTech Connect

Since the introduction of horizontal drilling, most completions have been open hole. Open-hole or slotted-liner completions may be satisfactory in straight, thick formations, if stimulation is not required. But if the wellbore wanders out of the reservoir, whether due to loss of directional control or spotty knowledge of formation dimensions, casing becomes a necessity. In addition, a wellbore that stays in the formation but comes uncomfortably close to the water-oil contact or gas cap requires casing to prevent coning. Further, if stimulation is anticipated, or may become a necessity, it is essential that the hole be cased and cemented. Otherwise, there is no control of the stimulation treatment. Even if the horizontal wellbore itself does not require casing, intermediate casing in the high-angle hole is needed. This is especially critical in open-hole completions below a gas cap, for example. The keys to effective horizontal cementing are fundamentally the same as for cementing vertical wells: proper centralization of casing in the bore-hole to ensure efficient mud removal and well-designed cement slurries.

Baret, F.; Griffin, T.J.

1989-05-01T23:59:59.000Z

214

Documentation of high resolution solar resource assessment (10km) for Kenya  

Open Energy Info (EERE)

Kenya Kenya provided by DLR Dataset Summary Description (Abstract): Documentation of the satellite-based high resolution solar resource assessment for Kenya provided by DLR. The high resolution solar data (10kmx10km) provide country maps of the annual and monthly sums of hourly global horizontal and direct normal irradiance (GHI and DNI) for the year 2000, 2001 and 2002. Additionally, for selected sites hourly values of GHI and DNI are provided.The Documentation gives an overview about the used input data and used methodology, shows example maps and describes a comparison with ground data (if provided by the country) (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. For the selected sites, the hourly time series can be used for the simulation of Photovoltaic (PV)-systems or Concentrating Solar Power (CSP)-systems.

215

Documentation of high resolution solar resource assessment (10km) for Nepal  

Open Energy Info (EERE)

Nepal Nepal provided by DLR Dataset Summary Description (Abstract): Documentation of the satellite-based high resolution solar resource assessment for Nepal provided by DLR. The high resolution solar data (10kmx10km) provide country maps of the annual and monthly sums of hourly global horizontal and direct normal irradiance (GHI and DNI) for the year 2000, 2002 and 2003. Additionally, for selected sites hourly values of GHI and DNI are provided.The Documentation gives an overview about the used input data and used methodology, shows example maps and describes a comparison with ground data (if provided by the country) (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. For the selected sites, the hourly time series can be used for the simulation of Photovoltaic (PV)-systems or Concentrating Solar Power (CSP)-systems.

216

Documentation of high resolution solar resource assessment (10km) for China  

Open Energy Info (EERE)

China China provided by DLR Dataset Summary Description (Abstract): Documentation of the satellite-based high resolution solar resource assessment for China provided by DLR. The high resolution solar data (10kmx10km) provide country maps of the annual and monthly sums of hourly global horizontal and direct normal irradiance (GHI and DNI) for the year 2000, 2002 and 2003. Additionally, for selected sites hourly values of GHI and DNI are provided.The Documentation gives an overview about the used input data and used methodology, shows example maps and describes a comparison with ground data (if provided by the country) (Purpose): The data are helpful for the assessment of the solar potential of the country and can give project developer a first impression of the solar resource of the country. For the selected sites, the hourly time series can be used for the simulation of Photovoltaic (PV)-systems or Concentrating Solar Power (CSP)-systems.

217

Optimized Designs and Materials for Nanostructure Based Solar Cells  

E-Print Network (OSTI)

IBSC Tc = 300K Solar Concentration Ratio (suns) Fig. 3.25irradiation and solar cells The irradiance of the sun on thebetween Sun and Earth - is called the solar constant. The

Shao, Qinghui

2009-01-01T23:59:59.000Z

218

irradiance | OpenEI  

Open Energy Info (EERE)

irradiance irradiance Dataset Summary Description (Abstract): Latitude Tilt Irradiance NASA Surface meteorology and Solar Energy (SSE) Release 6.0 Data Set (Jan 2008)22-year Monthly & Annual Average (July 1983 - June 2005) Parameter: Latitude Tilt Radiation (kWh/m^2/day) Internet: http://eosweb.larc.nasa.gov/sse/ Note 1: SSE Methodology & Accuracy sections online Source U.S. National Aeronautics and Space Administration (NASA), Surface meteorology and Solar Energy (SSE) Date Released March 31st, 2009 (5 years ago) Date Updated April 01st, 2009 (5 years ago) Keywords GIS global irradiance latitude mapping NASA renewable energy solar solar PV SWERA TILT UNEP Data text/csv icon Latitude Tilt Radiation (kWh/m^2/day) (csv, 11.8 MiB) application/zip icon Download Shapefile (zip, 5 MiB)

219

ESTIMATING SPATIAL AND TEMPORAL VARIATIONS IN SOLAR RADIATION WITHIN BORDEAUX WINEGROWING REGION USING REMOTELY SENSED DATA  

E-Print Network (OSTI)

Aims: This paper presents a study solar radiation spatial and temporal variations in Bordeaux winegrowing area, for a 20 year period (1986-2005). Methods and results: Solar radiation data was retrieved from the HelioClim-1 database, elaborated from Meteosat satellite images, using the Heliosat-2 algorithm. Daily data was interpolated using ordinary kriging to produce horizontal solar radiation maps at a 500 m resolution. Using a digital elevation model, high resolution daily solar radiation maps with terrain integration were then produced for the period 2001-2005, at a 50 m resolution. The long term (20 years) analysis of solar radiation at low spatial resolution (500 m) showed a west to east decreasing gradient within Bordeaux vineyards. Mean August-to-September daily irradiation values, on horizontal surface, were used to classify Bordeaux winegrowing areas in three zones: low, medium, and high solar radiation areas. This initial zoning was upscaled at 50 m resolution, applying a local correction ratio, based on 2001-2005 solar radiation on inclined surface analysis. Grapevine development and maturation potential of the different zones of appellation of origin of Bordeaux winegrowing area are discussed in relation with

Benjamin Bois A; Lucien Wald B; Cornelis Van Leeuwen Ac; Commagnac C; Maxime Christen C; Jean-pierre Gaudillere A

2009-01-01T23:59:59.000Z

220

Aerosols and solar energy  

DOE Green Energy (OSTI)

A brief description is presented of the involvement of the Solar Energy Research Institute (SERI) in atmospheric research, including aerosol characterization and modeling. The use of both rigorous and simple models for radiation transport is described. Modeled broadband solar irradiance data are shown to illustrate the important influence that aerosols have on the energy available to solar systems and the economics of solar systems design. Standard aerosol measurement methods for solar applications are discussed along with the need for improved instrumentation and methods.

Bird, R. E.; Hulstrom, R. L.

1979-01-01T23:59:59.000Z

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


221

HORIZONTAL BOILING REACTOR SYSTEM  

DOE Patents (OSTI)

Reactors of the boiling water type are described wherein water serves both as the moderator and coolant. The reactor system consists essentially of a horizontal pressure vessel divided into two compartments by a weir, a thermal neutronic reactor core having vertical coolant passages and designed to use water as a moderator-coolant posltioned in one compartment, means for removing live steam from the other compartment and means for conveying feed-water and water from the steam compartment to the reactor compartment. The system further includes auxiliary apparatus to utilize the steam for driving a turbine and returning the condensate to the feed-water inlet of the reactor. The entire system is designed so that the reactor is self-regulating and has self-limiting power and self-limiting pressure features.

Treshow, M.

1958-11-18T23:59:59.000Z

222

Increasing the solar photovoltaic energy capture on sunny and cloudy days  

Science Conference Proceedings (OSTI)

This report analyzes an extensive set of measurements of the solar irradiance made using four identical solar arrays and associated solar sensors (collectively referred to as solar collectors) with different tilt angles relative to the earth's surface, and thus the position of the sun, in order to determine an optimal tracking algorithm for capturing solar radiation. The study included a variety of ambient conditions including different seasons and both cloudy and cloud-free conditions. One set of solar collectors was always approximately pointed directly toward the sun (DTS) for a period around solar noon. These solar collectors thus captured the direct beam component of the solar radiation that predominates on sunny days. We found that on sunny days, solar collectors with a DTS configuration captured more solar energy in accordance with the well-known cosine dependence for the response of a flat-surfaced solar collector to the angle of incidence with direct beam radiation. In particular, a DTS orientation was found to capture up to twice as much solar energy as a horizontal (H) orientation in which the array is tilted toward the zenith. Another set of solar collectors always had an H orientation, and this best captured the diffuse component of the solar radiation that predominates on cloudy days. The dependence of the H/DTS ratio on the solar-collector tilt angle was in approximate agreement with the Isotropic Diffuse Model derived for heavily overcast conditions. During cloudy periods, we found that an H configuration increased the solar energy capture by nearly 40% compared to a DTS configuration during the same period, and we estimate the solar energy increase of an H configuration over a system that tracks the obscured solar disk could reach 50% over a whole heavily-overcast day. On an annual basis the increase is predicted to be much less, typically only about 1%, because the contribution of cloudy days to the total annual solar energy captured by a photovoltaic system is small. These results are consistent with the solar tracking algorithm optimized for cloudy conditions that we proposed in an earlier report and that was based on a much smaller data set. Improving the harvesting of solar energy on cloudy days deserves wider attention due to increasing efforts to utilize renewable solar energy. In particular, increasing the output of distributed solar power systems on cloudy days is important to developing solar-powered home fueling and charging systems for hydrogen-powered fuel-cell electric and battery-powered vehicles, respectively, because it reduces the system size and cost for solar power systems that are designed to have sufficient energy output on the worst (cloudy) days. (author)

Kelly, Nelson A.; Gibson, Thomas L. [General Motors R and D Center, 480-106-269, Chemical Sciences and Materials Systems Laboratory, 30500 Mound Road, Warren, MI 48090-9055 (United States)

2011-01-15T23:59:59.000Z

223

SOLERAS - Solar Energy Water Desalination Project. Solar energy falling on Yanbu, Saudi Arabia, August 1985  

Science Conference Proceedings (OSTI)

The direct normal and total horizontal insolation that fell on the Yanbu, Saudi Arabia solar powered desolation site during the month of August 1985 are presented. (BCS)

Not Available

1986-01-01T23:59:59.000Z

224

Core-Shell Nanopillar Array Solar Cells using Cadmium Sulfide Coating on Indium Phosphide Nanopillars  

E-Print Network (OSTI)

each wavelength of the solar spectrum, or external quantumgray curve shows the solar spectrum (blackbody radiation)covers most of the solar spectrum where irradiance is

Tu, Bor-An Clayton

2013-01-01T23:59:59.000Z

225

20 Years of Solar Measurements: The Solar Radiation Research...  

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

decreases in direct (beam) irradiance. Daily variations in the amounts of solar energy components vary with the types, amounts, and distribution of the clouds, amounts of...

226

SOLERAS - Solar Energy Water Desalination Project. Solar energy falling on Yanbu, Saudi Arabia, May 1985  

Science Conference Proceedings (OSTI)

Yanbu, Saudi Arabia was selected as the location for the SOLERAS Solar Powered Desalination Plant. The direct normal and total horizontal insolation that fell on the Yanbu solar powered desalination site during the month of May 1985 are presented. (BCS)

Not Available

1985-01-01T23:59:59.000Z

227

SOLERAS - Solar Energy Water Desalination Project. Solar energy falling on Yanbu, Saudi Arabia, June 1985  

Science Conference Proceedings (OSTI)

Yanbu, Saudi Arabia was selected as the location for the SOLERAS Solar Powered Desalination Plant. The direct normal and total horizontal insolation that fell on the Yanbu solar powered desalination site during the month of June 1985 are presented. (BCS)

Not Available

1985-01-01T23:59:59.000Z

228

SOLERAS - Solar Energy Water Desalination Project. Solar energy falling on Yanbu, Saudi Arabia  

Science Conference Proceedings (OSTI)

Yanbu, Saudi Arabia was selected as the location for the SOLERAS Solar Powered Desalination Plant. The direct normal and total horizontal insolation that fell on the Yanbu solar powered desalination site during the month of March 1985 are presented. (BCS)

Not Available

1985-03-01T23:59:59.000Z

229

SOLERAS - Solar Energy Water Desalination Project. Solar energy falling on Yanbu, Saudi Arabia, April 1985  

Science Conference Proceedings (OSTI)

Yanbu, Saudi Arabia was selected as the location for the SOLERAS Solar Powered Desalination Plant. The direct normal and total horizontal insolation that fell on the Yanbu solar powered desalination site during the month of April 1985 was presented. (BCS)

Not Available

1985-01-01T23:59:59.000Z

230

Batch slurry photocatalytic reactors for the generation of hydrogen from sulfide and sulfite waste streams under solar irradiation  

SciTech Connect

In this study, two solar slurry photocatalytic reactors i.e., batch reactor (BR) and batch recycle reactor with continuous supply of inert gas (BRRwCG) were developed for comparing their performance. The performance of the photocatalytic reactors were evaluated based on the generation of hydrogen (H{sub 2}) from water containing sodium sulfide (Na{sub 2}S) and sodium sulfite (Na{sub 2}SO{sub 3}) ions. The photoreactor of capacity 300 mL was developed with UV-vis transparent walls. The catalytic powders ((CdS/ZnS)/Ag{sub 2}S + (RuO{sub 2}/TiO{sub 2})) were kept suspended by means of magnetic stirrer in the BR and gas bubbling and recycling of the suspension in the BRRwCG. The rate constant was found to be 120.86 (einstein{sup -1}) for the BRRwCG whereas, for the BR it was found to be only 10.92 (einstein{sup -1}). The higher rate constant was due to the fast desorption of products and suppression of e{sup -}/h{sup +} recombination. (author)

Priya, R.; Kanmani, S. [Centre for Environmental Studies, Anna University, Chennai (India)

2009-10-15T23:59:59.000Z

231

Fundamentals of horizontal well completions  

Science Conference Proceedings (OSTI)

Oil and gas wells are drilled horizontally for a variety of reasons, chiefly to improve production without drilling multiple vertical wells and to prevent water or gas coning. Benefits of horizontal drilling are well documented. This article addresses the fundamentals of completing a horizontal well, discussing completion by (1) open hole, (2) casing packers, (3) slotted or perforated liner, and (4) cemented casing/liner. Completion methods 1 through 3 are generally known as ''drain hole'' completions, and method 4 is commonly called the ''case hole'' or ''stimulated'' completion.

Austin, C.; Zimmerman, C.; Sullaway, B.; Sabins, F.

1988-05-01T23:59:59.000Z

232

Definition: Direct normal irradiance | Open Energy Information  

Open Energy Info (EERE)

Jump to: navigation, search Dictionary.png Direct normal irradiance the amount of solar radiation received per unit area by a surface perpendicular (normal) to the rays...

233

NIST Lunar spectral irradiance and radiance (LUSI)  

Science Conference Proceedings (OSTI)

... However, a spectrally resolved model that allows trending at the 0.1 % level ... of the lunar irradiance and radiance at reflected solar wavelengths. ...

2013-04-11T23:59:59.000Z

234

Measuring solar reflectance Part I: Defining a metric that accurately predicts solar heat gain  

E-Print Network (OSTI)

estimate solar heat gains in the cooling and heatingof E891BN solar irradiance economic value of annual heatingglobal solar re?ectance, ? R summer , and that the heating

Levinson, Ronnen

2010-01-01T23:59:59.000Z

235

Solar oven  

SciTech Connect

This patent describes a solar oven. It comprises: an oven chamber having an open end and defining an interior cooking chamber; means providing a flat-back interior surface on the cooking chamber for absorbing sunlight and converting the absorbed sunlight into heat; an oven door hingedly mounted over the open end and movable between open and closed positions relative to the open end; means for pivotably supporting the oven chamber about a first substantially horizontal pivot axis; user-actuable latch means for selectively retaining the oven chamber in selected positions around the first horizontal axis, the user-actuable latch means including a user releasable ratchet mechanism including a plurality of ratchet teeth formed on the oven chamber and ratchet pawl pivoted to the support means in a position to engage selective ones of the ratchet teeth to retain the over chamber in selected orientations around the horizontal axis, the latch means further including means for pivoting the pawl into and out of the path of movement of the ratchet teeth to thereby achieve the selective positioning; a tray disposed within the interior cooking chamber for supporting foodstuffs during coking; pivot means for pivotally mounting the tray within the interior cooking chamber for movement around a second substantially horizontal pivot axis such that the tray can be positioned so as to maintain the foodstuffs in a substantially level position independently of the position of the oven chamber around the first pivot axis.

Burns, T.J.; Burns, C.L.

1989-07-18T23:59:59.000Z

236

Comparison of Plotting Methods for Solar Radiometer Calibration  

Science Conference Proceedings (OSTI)

An alternative formulation of the Langley plot relating observed solar irradiance, extraterrestrial solar irradiance, and air mass has been suggested to potentially improve radiometer calibration accuracy. In this study, results from the ...

S. M. Adler-Golden; J. R. Slusser

2007-05-01T23:59:59.000Z

237

Nuclear component horizontal seismic restraint  

DOE Patents (OSTI)

A nuclear component horizontal seismic restraint. Small gaps limit horizontal displacement of components during a seismic occurrence and therefore reduce dynamic loadings on the free lower end. The reactor vessel and reactor guard vessel use thicker section roll-forged rings welded between the vessel straight shell sections and the bottom hemispherical head sections. The inside of the reactor guard vessel ring forging contains local vertical dovetail slots and upper ledge pockets to mount and retain field fitted and installed blocks. As an option, the horizontal displacement of the reactor vessel core support cone can be limited by including shop fitted/installed local blocks in opposing alignment with the reactor vessel forged ring. Beams embedded in the wall of the reactor building protrude into apertures in the thermal insulation shell adjacent the reactor guard vessel ring and have motion limit blocks attached thereto to provide to a predetermined clearance between the blocks and reactor guard vessel ring.

Snyder, Glenn J. (Lynchburg, VA)

1988-01-01T23:59:59.000Z

238

Horizontal completions challenge for industry  

SciTech Connect

As the technology to drill horizontal wells continues to evolve, the problem of efficiently and cost-effectively completing such wells grows. The economics of applying horizontal technology in high-productivity reservoirs demands both increased production and lower development costs. Such high productivity reservoirs are typical of the Gulf of Mexico, North Sea, South China basin, and other areas. Lowering development costs is achieved by drilling fewer wells and in the offshore environment by reducing the number of platforms and other well structures. Specifically addressed in this article are the problems of achieving high efficiency, long lasting completions while controlling costs in unconsolidated and poorly consolidated sandstone reservoirs.

Zaleski, T.E. Jr.; Spatz, E.

1988-05-02T23:59:59.000Z

239

Solar Neutrinos  

E-Print Network (OSTI)

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.

R. G. H. Robertson

2006-02-05T23:59:59.000Z

240

Solar access of residential rooftops in four California cities  

E-Print Network (OSTI)

irradiance (incident solar power/area) incident on unshaded,losses (loss of incident solar power/area) were calculatedreduces the aggregate solar power incident on the planes at

Levinson, Ronnen

2010-01-01T23:59:59.000Z

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


241

Solar radiation model validation  

Science Conference Proceedings (OSTI)

Several mathematical models have been developed within the past few years which estimate the solar radiation from other weather variables. Some of these models have been used to generate data bases which are extensively used in the design and analysis of solar system. Three of these solar radiation models have been used in developing the Augmented SOLMET Solar Data Tapes for the 26 SOLMET sites and the 222 ERSATZ Solar Data Tapes. One of the models, a theoretical one, predicts the solar noon radiation for clear sky conditions from the optical air mass, precipitable water vapor and turbidity variables. A second model, an empirical one, predicts the hourly total horizontal radiation from meteorological variables. And, a third model, also an empirical one, predicts the hourly direct normal radiation from the hourly total horizontal radiation. A study of the accuracy of these three solar radiation models is reported here. To assess the accuracy of these models, data were obtained from several US National Weather Service Stations and other sources, used the models to estimate the solar-radiation, and then compared the modeled radiation values with observed radiation values. The results of these comparisons and conclusions regarding the accuracy of the models are presented.

Hall, I.J.; Prairie, R.R.; Anderson, H.E.; Boes, E.C.

1980-10-01T23:59:59.000Z

242

The Canopy Horizontal Array Turbulence Study  

Science Conference Proceedings (OSTI)

The Canopy Horizontal Array Turbulence Study (CHATS) took place in spring 2007 and is the third in the series of Horizontal Array Turbulence Study (HATS) experiments. The HATS experiments have been instrumental in testing and developing subfilterscale (...

Edward G. Patton; Thomas W. Horst; Peter P. Sullivan; Donald H. Lenschow; Steven P. Oncley; William O. J. Brown; Sean P. Burns; Alex B. Guenther; Andreas Held; Thomas Karl; Shane D. Mayor; Luciana V. Rizzo; Scott M. Spuler; Jielun Sun; Andrew A. Turnipseed; Eugene J. Allwine; Steven L. Edburg; Brian K. Lamb; Roni Avissar; Ronald J. Calhoun; Jan Kleissl; William J. Massman; Kyaw Tha Paw U; Jeffrey C. Weil

2011-05-01T23:59:59.000Z

243

Growing Nanowires Horizontally Yields New Benefit: 'Nano ...  

Science Conference Proceedings (OSTI)

Growing Nanowires Horizontally Yields New Benefit: 'Nano-LEDs'. ... Optical microscope image of nano LEDs emitting light. ...

2012-10-17T23:59:59.000Z

244

The Ratio of Diffuse to Direct Solar Irradiance (Perpendicular to the Sun's Rays) with Clear SkiesA Conserved Quantity Throughout the Day  

Science Conference Proceedings (OSTI)

The ratio of diffuse irradiance to direct normal is a conserved quantity throughout the day. Though its absolute value depends on the condition of the atmosphere, ground reflection and obstruction of horizon, once this value is established (by a ...

William A. Peterson; Inge Dirmhirn

1981-07-01T23:59:59.000Z

245

Solar Physics DOI: 10.1007/----  

E-Print Network (OSTI)

Solar Physics DOI: 10.1007/·····-···-···-····-· The EVE Doppler Sensitivity and Flare Observations primary objective is the characterization of solar spectral irradiance, but its sensitivity and stability, the Solar Dynamics Observatory (SDO). Solar flares also displace the spectrum, both because of Doppler

Hudson, Hugh

246

Solar Glare and Flux Mapping  

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

SGFMT Home SGFMT Home Register Glare Analysis Solar Glare Hazard Analysis SGHAT 1.0 (old) Empirical Glare Analysis Analytical Glare Analysis PHLUX Mapping Reflectivity Calculator References Contact Us Solar Glare and Flux Mapping Tools Measurement of reflected solar irradiance is receiving significant attention by industry, military, and government agencies to assess potential impacts of glint and glare from growing numbers of solar power installations around the world. In addition, characterization of the incident solar flux distribution on central receivers for concentrating solar power applications is important to monitor and maintain system performance. This website contains tools to evaluate solar glare and receiver irradiance. Register to access the tools Solar Glare Hazard Analysis Tool

247

Solids irradiator  

DOE Patents (OSTI)

A novel facility for irradiation of solids embodying pathogens wherein solids are conveyed through an irradiation chamber in individual containers of an endless conveyor.

Morris, Marvin E. (Albuquerque, NM); Pierce, Jim D. (Albuquerque, NM); Whitfield, Willis J. (Albuquerque, NM)

1979-01-01T23:59:59.000Z

248

DOE Solar Decathlon: 2009 Team Boston  

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

so the "L" is horizontal, with the long side composed of the top and roof. Three rows of solar panels peek up above the roof. The wood section sits atop a rectangular black...

249

Improved Atmospheric Solar Radiation Budget Pyranometry  

Science Conference Proceedings (OSTI)

The solar radiation budget is investigated with seven pyranometers. Three of these instruments have horizontally aligned sensors. The sensors of the remaining four instruments are vertically aligned in such a way that their normals point to the ...

Gottfried Hnel; Karin Kastner

2000-07-01T23:59:59.000Z

250

Sub-Hour Solar Data for Power System Modeling From Static Spatial Variability Analysis: Preprint  

Science Conference Proceedings (OSTI)

High penetration renewable integration studies need high quality solar power data with spatial-temporal correlations that are representative of a real system. This paper will summarize the research relating sequential point-source sub-hour global horizontal irradiance (GHI) values to static, spatially distributed GHI values. This research led to the development of an algorithm for generating coherent sub-hour datasets that span distances ranging from 10 km to 4,000 km. The algorithm, in brief, generates synthetic GHI values at an interval of one-minute, for a specific location, using SUNY/Clean Power Research, satellite-derived, hourly irradiance values for the nearest grid cell to that location and grid cells within 40 km.

Hummon, M.; Ibanez, E.; Brinkman, G.; Lew, D.

2012-12-01T23:59:59.000Z

251

A Simple All Weather Model to Estimate Ultraviolet Solar Radiation (290385 nm)  

Science Conference Proceedings (OSTI)

A new expression to estimate the solar ultraviolet irradiance from parameters usually available in radiometric networks is presented. The authors have analyzed the relation between solar ultraviolet global irradiance (290385 nm), UV, and ...

I. Foyo-Moreno; J. Vida; L. Alados-Arboledas

1999-07-01T23:59:59.000Z

252

Brazil Global Horizontal Solar Radiation Model (10km) from INPE  

Open Energy Info (EERE)

by INPE - National Institute for Space Research) were used to produce the dataset and SHAPE files

(Supplemental Information): The assessment of...

253

South America Global Horizontal SR Solar Model from INPE and...  

Open Energy Info (EERE)

for Space Research) and the ARCVIEW software were used to produce the dataset and SHAPE files. The assessment of reliability levels of the BRASIL-SR model were performed...

254

Brazil Global Horizontal Solar Radiation Model (40km) from INPE  

Open Energy Info (EERE)

by INPE - National Institute for Space Research) were used to produce the dataset and SHAPE files.
The assessment of reliability levels of the BRASIL-SR model were performed...

255

Solar: monthly and annual average global horizontal (GHI) GIS...  

Open Energy Info (EERE)

on cloud cover, atmospheric water vapor and trace gases, and the amount of aerosols in the atmosphere to calculate the monthly average daily total insolation (sun and...

256

Solar: monthly and annual latitude tilt horizontal GIS data at...  

Open Energy Info (EERE)

on cloud cover, atmospheric water vapor and trace gases, and the amount of aerosols in the atmosphere to calculate the monthly average daily total insolation (sun and...

257

Solar Cycle Variations of p-Mode Frequencies  

E-Print Network (OSTI)

Observations show that the solar p-mode frequencies change with the solar cycle. The horizontal-phase-velocity dependence of the relative frequency change, scaled by mode mass, provides depth information on the perturbation in the solar interior. We find that the smoothed scaled relative frequency change varies along the solar cycle for horizontal phase velocities higher than a critical value, which corresponds to a depth near the base of the convection zone. This phenomenon suggests that the physical conditions in a region near the base of the convection zone change with the solar cycle.

Dean-Yi Chou; Alexander Serebryanskiy

2004-05-10T23:59:59.000Z

258

Gravel packing feasible in horizontal well completions  

SciTech Connect

Successful completion of horizontal wells in unconsolidated formations depends on proper equipment selection and installation method balanced with reservoir objectives, formation parameters, and costs. The guidelines for designing these completions are based on generalized field experience, including horizontal cases where applicable.

Zaleski, T.E. Jr.; Ashton, J.P. (Baker Sand Control, Houston, TX (US))

1990-06-11T23:59:59.000Z

259

Horizontal Symmetries $?(150)$ and $?(600)$  

E-Print Network (OSTI)

Using group theory of mixing to examine all finite subgroups of SU(3) with an order less than 512, we found recently that only the group $\\Delta(150)$ can give rise to a correct reactor angle $\\th_{13}$ of neutrino mixing without any free parameter. It predicts $\\sin^22\\th_{13}=0.11$ and a sub-maximal atmospheric angle with $\\sin^22\\th_{23}=0.94$, in good agreement with experiment. The solar angle $\\th_{12}$, the CP phase $\\d$, and the neutrino masses $m_i$ are left as free parameters. In this article we provide more details of this case, discuss possible gain and loss by introducing right-handed symmetries, and/or valons to construct dynamical models. A simple model is discussed where the solar angle agrees with experiment, and all its mixing parameters can be obtained from the group $\\Delta(600)$ by symmetry alone. The promotion of $\\Delta(150)$ to $\\Delta(600)$ is on the one hand analogous to the promotion of $S_3$ to $S_4$ in the presence of tribimaximal mixing, and on the other hand similar to the extension from $A_4$ to $S_4$ in that case.

C. S. Lam

2013-01-09T23:59:59.000Z

260

Definition: Irradiance | Open Energy Information  

Open Energy Info (EERE)

Irradiance Irradiance Jump to: navigation, search Dictionary.png Irradiance The direct, diffuse, and reflected solar radiation that strikes a surface. Usually expressed in kilowatts per square meter. Irradiance multiplied by time equals insolation.[1] View on Wikipedia Wikipedia Definition Irradiance is the power of electromagnetic radiation per unit area incident on a surface. Radiant emittance or radiant exitance is the power per unit area radiated by a surface. The SI units for all of these quantities are watts per square meter (W/m), while the cgs units are ergs per square centimeter per second (erg·cm·s, often used in astronomy). These quantities are sometimes called intensity, but this usage leads to confusion with radiant intensity, which has different units. All of these

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


261

Statistical criteria for characterizing irradiance time series.  

SciTech Connect

We propose and examine several statistical criteria for characterizing time series of solar irradiance. Time series of irradiance are used in analyses that seek to quantify the performance of photovoltaic (PV) power systems over time. Time series of irradiance are either measured or are simulated using models. Simulations of irradiance are often calibrated to or generated from statistics for observed irradiance and simulations are validated by comparing the simulation output to the observed irradiance. Criteria used in this comparison should derive from the context of the analyses in which the simulated irradiance is to be used. We examine three statistics that characterize time series and their use as criteria for comparing time series. We demonstrate these statistics using observed irradiance data recorded in August 2007 in Las Vegas, Nevada, and in June 2009 in Albuquerque, New Mexico.

Stein, Joshua S.; Ellis, Abraham; Hansen, Clifford W.

2010-10-01T23:59:59.000Z

262

Computing Solar Absolute Fluxes  

E-Print Network (OSTI)

Computed color indices and spectral shapes for individual stars are routinely compared with observations for essentially all spectral types, but absolute fluxes are rarely tested. We can confront observed irradiances with the predictions from model atmospheres for a few stars with accurate angular diameter measurements, notably the Sun. Previous calculations have been hampered by inconsistencies and the use of outdated atomic data and abundances. I provide here a progress report on our current efforts to compute absolute fluxes for solar model photospheres. Uncertainties in the solar composition constitute a significant source of error in computing solar radiative fluxes.

Prieto, Carlos Allende

2007-01-01T23:59:59.000Z

263

Computing Solar Absolute Fluxes  

E-Print Network (OSTI)

Computed color indices and spectral shapes for individual stars are routinely compared with observations for essentially all spectral types, but absolute fluxes are rarely tested. We can confront observed irradiances with the predictions from model atmospheres for a few stars with accurate angular diameter measurements, notably the Sun. Previous calculations have been hampered by inconsistencies and the use of outdated atomic data and abundances. I provide here a progress report on our current efforts to compute absolute fluxes for solar model photospheres. Uncertainties in the solar composition constitute a significant source of error in computing solar radiative fluxes.

Carlos Allende Prieto

2007-09-14T23:59:59.000Z

264

Solar energy storage through the homogeneous electrocatalytic reduction of carbon dioxide : photoelectrochemical and photovoltaic approaches  

E-Print Network (OSTI)

a a Under one sun AM 1.5G peak solar flux (1000W m 2 ),exposed to the sun. The solar resource is variable,one sun irradiance, the limit for a single junction solar

Sathrum, Aaron John

2011-01-01T23:59:59.000Z

265

SOLAR ENERGY PROGRAM: CHAPTER FROM THE ENERGY AND ENVIRONMENT ANNUAL REPORT 1979  

E-Print Network (OSTI)

Irradiance- Transmittance Solar Spectrum and Its Applica-filters that divide the solar spectrum into eight intervalsat the blue end of the solar spectrum and the other at the

Authors, Various

2010-01-01T23:59:59.000Z

266

Implications of Wide-Area Geographic Diversity for Short- Term Variability of Solar Power  

E-Print Network (OSTI)

the limits of solar photovoltaics (PV) in traditionalof the same amount of PV if all solar were to be located aton areal solar irradiance for analyzing areally-totalized PV

Mills, Andrew

2010-01-01T23:59:59.000Z

267

National Solar Radiation Database | Open Energy Information  

Open Energy Info (EERE)

National Solar Radiation Database National Solar Radiation Database Jump to: navigation, search The National Solar Radiation Database, or NSRDB, describes the amount of solar energy which is available at any location in the United States. It is generated by the National Renewable Energy Laboratory, with the assistance of many collaborators.[1] Technical Overview Per its user's manual, "The NSRDB is a serially complete collection of hourly values of the three most common measurements of solar radiation (global horizontal, direct normal, and diffuse horizontal) over a period of time adequate to establish means and extremes, and at a sufficient number of locations to represent regional solar radiation climates."[2] There have been two releases of the NSRDB, each covering different time

268

Improved Solar Power Plant Efficiency: Low Cost Vaccine ...  

Background Photovoltaic (PV) systems are of great interest to the efforts of sustainable energy. Solar irradiance is a measure of the suns ...

269

NREL: MIDC/University of Texas Panamerican Solar Radiation Lab...  

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

The Measurement and Instrumentation Data Center collects Irradiance and Meterological data from the University of Texas Panamerican (UTPA) Solar Radiation Lab (SRL)....

270

Proper centralizers can improve horizontal well cementing  

SciTech Connect

The selection and spacing of appropriate centralizers can improve the cementation of high-angle and horizontal wells. Mud removal is one of the most important factors in obtaining a good cement job. Effective centralization assists in mud removal and helps ensure an even cement coat around the casing. Centralizers for horizontal wells have to fulfill two requirements: They should have a high restoring capability and a low moving force, and they should allow pipe rotation and reciprocation. Conventional bow-type centralizers have been used successfully in some horizontal wells. But as the horizontal section length increases, special centralizers, such as low-moving-force, bow-type centralizers and rigid centralizers, may be necessary. The paper describes the following: cementing liners, centralization, torque and drag, centralizer placement, the bow-type centralizer, the rigid centralizer, and the downhole activated centralizer.

Kinzel, H. (Weatherford Oil Tool, Langenhagen (Germany))

1993-09-20T23:59:59.000Z

271

Horizontal Roll Vortices and Crown Fires  

Science Conference Proceedings (OSTI)

Observational evidence from nine crown fires suggests that horizontal roll vortices are a major mechanism in crown-fire spread. Post-burn aerial photography indicates that unburned tree-crown streets are common with crown fire. Investigation of ...

Donald A. Haines

1982-06-01T23:59:59.000Z

272

OpenEI - solar radiation  

Open Energy Info (EERE)

monthly and monthly and annual average latitude tilt GIS data at 40km resolution for Mexico, Central America, and the Caribbean Islands from NREL http://en.openei.org/datasets/node/500 (Abstract):  Monthly Average Solar Resource for flat-plate collectors tilted at latitude, for Mexico, Central America,
and the Caribbean Islands. (Purpose):  Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented due south at an angle from horizontal equal to the latitude of the

273

Irradiation Studies  

Science Conference Proceedings (OSTI)

Mar 4, 2013 ... Materials and Fuels for the Current and Advanced Nuclear Reactors II: Irradiation Studies Sponsored by: TMS Structural Materials Division,...

274

Marketing Strategies for Horizontal Axis Washers  

Science Conference Proceedings (OSTI)

Horizontal axis washing machines provide superior washing quality and gentleness as well as reduced energy use. This EPRI guide describes how utilities can effectively engage the horizontal axis washing machine market and the strategic and load-related reasons they should be interested in doing so. The guide covers topics ranging from a detailed overview of the marketplace to specific tactical advice that offers practical insights for any utility considering entering this new market.

1997-04-21T23:59:59.000Z

275

Tracking granules on the Sun's surface and reconstructing horizontal velocity fields: I. the CST algorithm  

E-Print Network (OSTI)

Determination of horizontal velocity fields on the solar surface is crucial for understanding the dynamics of structures like mesogranulation or supergranulation or simply the distribution of magnetic fields. We pursue here the development of a method called CST for coherent structure tracking, which determines the horizontal motion of granules in the field of view. We first devise a generalization of Strous method for the segmentation of images and show that when segmentation follows the shape of granules more closely, granule tracking is less effective for large granules because of increased sensitivity to granule fragmentation. We then introduce the multi-resolution analysis on the velocity field, based on Daubechies wavelets, which provides a view of this field on different scales. An algorithm for computing the field derivatives, like the horizontal divergence and the vertical vorticity, is also devised. The effects from the lack of data or from terrestrial atmospheric distortion of the images are also briefly discussed.

M. Rieutord; T. Roudier; S. Roques; C. Ducottet

2007-07-13T23:59:59.000Z

276

Economic viability of multiple-lateral horizontal wells.  

E-Print Network (OSTI)

??Horizontal wells are gaining popularity throughout the petroleum industry as a means to increase well productivity and enhance incremental economics. Horizontal wells provide greater reservoir (more)

Smith, Christopher Jason

2012-01-01T23:59:59.000Z

277

Some Results of Joint Measurements of Aerosol Extinction of Solar...  

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

Results of Joint Measurements of Aerosol Extinction of Solar Radiation on Horizontal and Slant Paths S. M. Sakerin, D. M. Kabanov, Yu. A. Pkhalagov, and V. N. Uzhegov Institute of...

278

Visibility graph analysis of solar wind velocity  

E-Print Network (OSTI)

We analyze in situ measurements of solar wind velocity obtained by Advanced Composition Explorer (ACE) spacecraft and Helios spacecraft during the years 1998-2012 and 1975-1983 respectively. The data belong to mainly solar cycle 23 (1996-2008) and solar cycle 21 (1976-1986) respectively. We use Directed Horizontal Visibility graph (DHVg) algorithm and estimate a graph functional, namely, the degree distance (D) as the Kullback-Leibler divergence (KLD) argument to understand time irreversibility of solar wind time series. We estimate this degree distance irreversibility parameter for these time series at different phases of solar activity cycle. Irreversibility parameter is first established for known dynamical data and then applied for solar wind velocity time series. It is observed that irreversibility in solar wind velocity fluctuations show similar behaviour at 0.3 AU (Helios data) and 1 AU (ACE data). Moreover it changes over the different phases of solar activity cycle.

Suyal, Vinita; Singh, Harinder P

2013-01-01T23:59:59.000Z

279

solar radiation | OpenEI  

Open Energy Info (EERE)

radiation radiation Dataset Summary Description (Abstract): Monthly Average Solar Resource for flat-plate collectors tilted at latitude, for Mexico, Central America, and the Caribbean Islands. (Purpose): Provide information on the solar resource potential for the data domain. The insolation values represent the average solar energy available to a flat plate collector, such as a photovoltaic panel, oriented due south at an angle from horizontal equal to the latitude of the collector location. Source NREL Date Released January 31st, 2004 (10 years ago) Date Updated October 30th, 2007 (7 years ago) Keywords atmospheric water vapor Carribean Central America GEF. latitude tilt GIS Mexico NREL solar solar radiation SWERA TILT UNEP Data application/zip icon Download Shapefile (zip, 241.3 KiB)

280

Sand-control alternatives for horizontal wells  

SciTech Connect

This paper reports that it has been well documented that horizontal completions increase production rates, as much as two to five times those of conventional techniques, because more of the producing formation is exposed to the wellbore. Although productivity improvements are highly sensitive to reservoir parameters, it is becoming generally accepted that optimum horizontal lengths will be 2,000 to 4,000 ft. The length of these completions generally causes the velocity of the fluid at the sandface to be an order of magnitude less than that observed in conventional completions. Because drag forces contributed to sand production, horizontal wells can produce at higher sand-free flow rates than conventional completions in the same reservoir. While it is frequently argued that horizontal wells do not need sand control, the potential for sand production increases significantly as reserves deplete and rock stresses increase. This is becoming more evident today in several major North Sea oil fields with conventional completions. Also, many unconsolidated formations produce sand for the first time with the onset of water production, a typical problem in such areas as the Gulf of Mexico. Operators must decide whether to implement sand control in the original horizontal-completion program because of an immediate concern or because the potential exists for a problem to arise as the well matures.

Zaleski, T.E. Jr. (Baker Sand Control (US))

1991-05-01T23:59:59.000Z

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


281

Horizontal stirring in the global ocean  

E-Print Network (OSTI)

Horizontal mixing and the distribution of coherent structures in the global ocean are analyzed using Finite-Size Lyapunov Exponents (FSLE), computed for the surface velocity field derived from the Ocean general circulation model For the Earth Simulator (OFES). FSLEs measure horizontal stirring and dispersion; additionally, the transport barriers which organize the oceanic flow can roughly be identified with the ridges of the FSLE field. We have performed a detailed statistical study, particularizing for the behaviour of the two hemispheres and different ocean basins. The computed Probability Distributions Functions (PDFs) of FSLE are broad and asymmetric. Horizontal mixing is generally more active in the northern hemisphere than in the southern one. Nevertheless the Southern Ocean is the most active ocean, and the Pacific the less active one. A striking result is that the main currents can be classified in two 'activity classes': Western Boundary Currents, which have broad PDFs with large FSLE values, and Eas...

Hernndez-Carrasco, I; Hernndez-Garca, E; Turiel, A

2011-01-01T23:59:59.000Z

282

Cogenerating Photovoltaic and Thermal Solar Collector  

E-Print Network (OSTI)

heat US Department of Energy: Parabolic Trough SpectroLab Concentrating Terrestrial PV Cell C1MJ CDO peak load and irradiance hours of the day #12;Design · Parabolic solar collector · GaAs PV cells

Eirinaki, Magdalini

283

The Distribution of Cloud Horizontal Sizes  

Science Conference Proceedings (OSTI)

Cloud horizontal size distributions from near-global satellite data, from aircraft, and from a global high-resolution numerical weather prediction model, are presented for the scale range 0.18000 km and are shown to be well-represented using a ...

Robert Wood; Paul R. Field

2011-09-01T23:59:59.000Z

284

ARM - Measurement - Shortwave broadband diffuse downwelling irradiance  

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

diffuse downwelling irradiance diffuse downwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave broadband diffuse downwelling irradiance All of the solar radiation, across the wavelength range of 0.4 and 4 {mu}m, coming directly from the sky except for solar radiation coming directly from the sun and the circumsolar irradiance within approximately three degrees of the sun. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments

285

Horizontal Wavenumber Spectra of Vertical Vorticity and Horizontal Divergence in the Upper Troposphere and Lower Stratosphere  

Science Conference Proceedings (OSTI)

The author shows that the horizontal two-point correlations of vertical vorticity and the associated vorticity wavenumber spectrum can be constructed from previously measured velocity structure functions in the upper troposphere and lower ...

Erik Lindborg

2007-03-01T23:59:59.000Z

286

Oak Ridge National Laboratory (ORNL); Rotating Shadowband Radiometer (RSR); Oak Ridge, Tennessee (Data)  

DOE Green Energy (OSTI)

This measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location.

Maxey, C.; Andreas, A.

2007-09-12T23:59:59.000Z

287

Oak Ridge National Laboratory (ORNL); Rotating Shadowband Radiometer (RSR); Oak Ridge, Tennessee (Data)  

DOE Data Explorer (OSTI)

This measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location.

Maxey, C.; Andreas, A.

288

Irradiation subassembly  

DOE Patents (OSTI)

An irradiation subassembly for use in a nuclear reactor is described which includes a bundle of slender elongated irradiation -capsules or fuel elements enclosed by a coolant tube and having yieldable retaining liner between the irradiation capsules and the coolant tube. For a hexagonal bundle surrounded by a hexagonal tube the yieldable retaining liner may consist either of six segments corresponding to the six sides of the tube or three angular segments each corresponding in two adjacent sides of the tube. The sides of adjacent segments abut and are so cut that metal-tometal contact is retained when the volume enclosed by the retaining liner is varied and Springs are provided for urging the segments toward the center of the tube to hold the capsules in a closely packed configuration. (Official Gazette)

Seim, O.S.; Filewicz, E.C.; Hutter, E.

1973-10-23T23:59:59.000Z

289

Enhanced Oil Recovery by Horizontal Waterflooding  

DOE Green Energy (OSTI)

Solar energy has become a major alternative for supplying a substantial fraction of the nation's future energy needs. The U.S. Department of Energy (DOE) supports activities ranging from the demonstration of existing technology to research on future possibilities. At Lawrence Berkeley Laboratory (LBL), projects are in progress that span a wide range of activities, with the emphasis on research to extend the scientific basis for solar energy applications, and on preliminary development of new approaches to solar energy conversion. To assess various solar applications, it is important to quantify the solar resource. Special instruments have been developed and are now in use to measure both direct solar radiation and circum-solar radiation, i.e., the radiation from near the sun resulting from the scattering of sunlight by small particles in the atmosphere. These measurements serve to predict the performance of solar designs that use focusing collectors employing mirrors or lenses to concentrate the sunlight. Efforts have continued at a low level to assist DOE in demonstrating existing solar technology by providing the San Francisco Operations Office (SAN) with technical support for its management of commercial-building solar demonstration projects. Also, a hot water and space-heating system has been installed on an LBL building as part of the DOE facilities Solar Demonstration Program. LBL continues to provide support for the DOE Appropriate Energy Technology grants program. Evaluations are made of the program's effectiveness by, for example, estimating the resulting potential energy savings. LBL also documents innovative features and improvements in economic feasibility as compared to existing conventional systems or applications. In the near future, we expect that LBL research will have a substantial impact in the areas of solar heating and cooling. Conventional and new types of high-performance absorption air conditioners are being developed that are air-cooled and suitable for use with flat plate or higher-temperature collectors. Operation of the controls test facility and computer modeling of collector loop and building load dynamics are yielding quantitative evaluations of the performance of different control strategies for active solar-heating systems. Research is continuing on ''passive'' approaches to solar heating and cooling, where careful considerations of architectural design, construction materials, and the environment are used to moderate a building's interior climate. Computer models of passive concepts are being developed and incorporated into building energy analysis computer programs which are in the public domain. The resulting passive analysis capabilities are used in systems studies leading to design tools and in the design of commercial buildings on a case study basis. The investigation of specific passive cooling methods is an ongoing project; for example, a process is being studied in which heat-storage material would be cooled by radiation to the night sky, and would then provide ''coolness'' to the building. Laboratory personnel involved in the solar cooling, controls, and passive projects are also providing technical support to the Active Heating and Cooling Division and the Passive and Hybrid Division of DOE in developing program plans, evaluating proposals, and making technical reviews of projects at other institutions and in industry. Low-grade heat is a widespread energy resource that could make a significant contribution to energy needs if economical methods can be developed for converting it to useful work. Investigations continued this year on the feasibility of using the ''shape-memory'' alloy, Nitinol, as a basis for constructing heat engines that could operate from energy sources, such as solar-heated water, industrial waste heat, geothermal brines, and ocean thermal gradients. Several projects are investigating longer-term possibilities for utilizing solar energy. One project involves the development of a new type of solar thermal receiver that would be placed at the focus of a central

Scott Robinowitz; Dwight Dauben; June Schmeling

2005-09-05T23:59:59.000Z

290

Alternative Parameterizations of Downward Irradiance and Their Dynamical Significance  

Science Conference Proceedings (OSTI)

The effect of solar flux divergence on upper ocean dynamics and energetics under both low and high wind speeds was determined using four different parameterizations of downward irradiance. The first (case I) involved only one attenuation length, ...

J. J. Simpson; T. D. Dickey

1981-06-01T23:59:59.000Z

291

Solar Decathlon  

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

U.S. Department of Energy Solar Decathlon Sara Farrar-Nagy National Renewable Energy Laboratory sara.farrar-nagy@nrel.gov, 303-384-7514 April 3, 2013 Solar Decathlon 2009 Solar...

292

Solar Easements  

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

293

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

E-Print Network (OSTI)

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 simulation. These uses require knowing the amount of solar radiation irradiating variously oriented walls and tilted roofs, which can be calculated from beam and diffuse radiation measured on a horizontal surface. It is possible to obtain such data using a multipyranometer array (MPA). However, the MPA is not as accurate as some other sensors and suffers from poor data reliability. This work improves the accuracy of the MPA and solves the problem of invalid data. Several schemes the removal of invalid data are tested. The location of the test equipment is changed to one with fewer obstructions. A Class A sensor is substituted for one of the photovoltaic sensors. Corrections are applied to the photovoltaic sensors. The need for changing sensor alignment is tested. As a result, accuracy has been significantly improved over previous work.

Klima, Peter Miloslaw

2000-01-01T23:59:59.000Z

294

Horizontal drilling in shallow, geologically complex reservoirs  

Science Conference Proceedings (OSTI)

The objective of this project is to test the concept that multiple hydraulic fracturing from a directionally-drilled horizontal well, using the medium radius build rate method, can increase gas production sufficiently to justify economic viability over conventional stimulated vertical wells. The test well is located in Yuma County, Colorado, in a favorable area of established production to avoid exploration risks. This report presents: background information; project description which covers location selection/geologic considerations; and preliminary work plan. (AT)

Venable, S.D.

1992-01-01T23:59:59.000Z

295

Horizontal drilling in shallow, geologically complex reservoirs  

Science Conference Proceedings (OSTI)

The objective of this project is to test the concept that multiple hydraulic fracturing from a directionally-drilled horizontal well, using the medium radius build rate method, can increase gas production sufficiently to justify economic viability over conventional stimulated vertical wells. The test well is located in Yuma County, Colorado, in a favorable area of established production to avoid exploration risks. This report presents: background information; project description which covers location selection/geologic considerations; and preliminary work plan. (AT)

Venable, S.D.

1992-10-01T23:59:59.000Z

296

Efficiency of luminescence in luminescent solar concentrators  

Science Conference Proceedings (OSTI)

The power effiency of luminescence excited by solar radiation in luminescent solar collectors is calculated for a glass sheet doped with CR/sup 3 +/. The achievable chemical potential for an optically thick absorber irradiated by diluted blackbody radiation as a function of Cr/sup 3 +/ concentration, sheet thickness, sunlight dilution, and luminescence quantum yield leads directly to overall conversion efficiency of solar power to luminescence power.

Lempicki, A.

1983-04-15T23:59:59.000Z

297

Short-Term Solar Energy Forecasting Using Wireless Sensor Networks  

E-Print Network (OSTI)

Short-Term Solar Energy Forecasting Using Wireless Sensor Networks Stefan Achleitner, Tao Liu in power output is a major concern and forecasting is, therefore, a top priority. We propose a sensing infrastructure to enable sensing of solar irradiance with application to solar array output forecasting

Cerpa, Alberto E.

298

Portable top drive cuts horizontal drilling costs  

SciTech Connect

Economic analysis of a seven-well, long-reach horizontal drilling program into an unconsolidated, heavy-oil-bearing reservoir in Winter field near the Alberta/Saskatchewan border in Canada reveals that -- in the right application -- renting a portable top drive drilling system can reduce total drilling costs. Use of the portable top drive combined with other cost-saving measures enabled Saskoil, one of Canada`s larger independents, to drill more cheaply, on a cost-per-meter basis, in 1993 than in 1992. This was despite significant rental rates for drilling rigs and directional drilling services caused by increased demand in Western Canada. Total cost savings of 10% on wells that would otherwise cost in the (C) $500,000 range are believed realistic. Based on this year`s performance, Saskoil recommends top drive for the company`s future horizontal wells in this area. This article describes the operator`s horizontal well program, advantages of top drive in that program and how it was installed and applied. Estimated time savings for six wells, plus other ways top drive can cut costs and improve operations are discussed.

Jackson, B. [Saskoil, Regina, Saskatchewan (Canada); Yager, D. [Tesco Drilling Tech., Calgary, Alberta (Canada)

1993-11-01T23:59:59.000Z

299

Twilight Irradiance Reflected by the Earth Estimated from Clouds and the Earth's Radiant Energy System (CERES) Measurements  

Science Conference Proceedings (OSTI)

The upward shortwave irradiance at the top of the atmosphere when the solar zenith angle is greater than 90 (twilight irradiance) is estimated from radiance measurements by the Clouds and the Earth's Radiant Energy System (CERES) instrument on ...

Seiji Kato; Norman G. Loeb

2003-08-01T23:59:59.000Z

300

Estimators for the Standard Deviation of Horizontal Wind Direction  

Science Conference Proceedings (OSTI)

The standard deviation of horizontal wind direction is a central quantity in the description of atmospheric turbulence and of great practical use in dispersion models. As horizontal wind direction is a circular variable, its standard deviation ...

Rudolf O. Weber

1997-10-01T23:59:59.000Z

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


301

Californium Neutron Irradiation Facility  

Science Conference Proceedings (OSTI)

Californium Neutron Irradiation Facility. Summary: ... Cf irradiation facility (Photograph by: Neutron Physics Group). Lead Organizational Unit: pml. Staff: ...

2013-07-23T23:59:59.000Z

302

Horizontal drilling boosts Pennsylvanias natural gas production ...  

U.S. Energy Information Administration (EIA)

Between 2009 and 2011, Pennsylvania's natural gas production more than quadrupled due to expanded horizontal drilling combined with hydraulic fracturing.

303

Definition: Solar Water Heating | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Solar Water Heating Jump to: navigation, search Dictionary.png Solar Water Heating A low-energy intensive system that uses solar rays to heat water. It is a viable option in developing countries[1] View on Wikipedia Wikipedia Definition Solar water heating (SWH) or solar hot water (SHW) systems comprise several innovations and many mature renewable energy technologies that have been well established for many years. SWH has been widely used in Australia, Austria, China, Cyprus, Greece, India, Israel, Japan and Turkey. In a "close-coupled" SWH system the storage tank is horizontally mounted immediately above the solar collectors on the roof. No pumping is required as the hot water naturally rises into the tank through thermosiphon flow.

304

An Upper Threshold of Enhanced Global Shortwave Irradiance in the Troposphere Derived from Field Measurements in Tropical Mountains  

Science Conference Proceedings (OSTI)

Extraordinarily high values of global irradiance (up to 1832 W m?2) incident upon a horizontal surface were observed during a 4-yr meteorological field campaign in the southern Ecuadorian Andes Mountains (4S). The unexpected magnitude gave rise ...

P. Emck; M. Richter

2008-11-01T23:59:59.000Z

305

Thermal performance of clean horizontal radiant barriers under winter conditions: Laboratory measurements and mathematical modeling  

Science Conference Proceedings (OSTI)

Several field experiments have been performed on attic radiant barriers under winter conditions; however, most of them have been confined to the fairly mild climates of Florida, Oklahoma, and Tennessee. Only one field experiment in a very cold climate (Canada) has been performed. In addition, no previous laboratory experiments under winter conditions have been performed on an attic both with and without a radiant barrier. This paper presents the results of laboratory measurements of the thermal performance of clean horizontal radiant barriers in a simulated residential attic module under nighttime or low solar gain daytime winter conditions. Comparing tests under the same conditions with and without a radiant barrier shows that the addition of a clean horizontal radiant barrier to insulation at the R-22 to R-25 level decreases the ceiling heat flow by 6 to 8%. The experimental results were found to be in very good agreement with predictions made with a mathematical model for the thermal performance of attics.

Wilkes, K.E.; Childs, P.W.

1992-01-01T23:59:59.000Z

306

Thermal performance of clean horizontal radiant barriers under winter conditions: Laboratory measurements and mathematical modeling  

Science Conference Proceedings (OSTI)

Several field experiments have been performed on attic radiant barriers under winter conditions; however, most of them have been confined to the fairly mild climates of Florida, Oklahoma, and Tennessee. Only one field experiment in a very cold climate (Canada) has been performed. In addition, no previous laboratory experiments under winter conditions have been performed on an attic both with and without a radiant barrier. This paper presents the results of laboratory measurements of the thermal performance of clean horizontal radiant barriers in a simulated residential attic module under nighttime or low solar gain daytime winter conditions. Comparing tests under the same conditions with and without a radiant barrier shows that the addition of a clean horizontal radiant barrier to insulation at the R-22 to R-25 level decreases the ceiling heat flow by 6 to 8%. The experimental results were found to be in very good agreement with predictions made with a mathematical model for the thermal performance of attics.

Wilkes, K.E.; Childs, P.W.

1992-08-01T23:59:59.000Z

307

SOLERAS - Solar Energy Water Desalination Project. Solar energy falling on Yanbu, Saudi Arabia, July 1985  

Science Conference Proceedings (OSTI)

Yanbu is located in the Western Province of Saudi Arabia on the Red Sea at a latitude of 24.1 degrees North and a longitude of 37.8 degrees East. It was selected as the location for the Soleras Solar Powered Desalination Plant. This preliminary report describes the direct normal and total horizontal insolation that fell on the Yanbu Solar Powered Desalination site during the month of July 1985.

Not Available

1986-01-01T23:59:59.000Z

308

The National Solar Thermal Test Facility at Sandia National Laboratories conducts research and development  

E-Print Network (OSTI)

, photovoltaic (PV) energy generation techniques have received significant attention, since solar energy for practical applications, such as PV power stations, solar-powered vehicles, and solar power heating the string charger interface. Solar irradiations received by PV cells in the PV system, may be different

Fuerschbach, Phillip

309

ARM - Measurement - Shortwave narrowband total upwelling irradiance  

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

upwelling irradiance upwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave narrowband total upwelling irradiance The rate at which radiant energy, in narrow bands of wavelengths shorter than approximately 4 {mu}m, passes through a horizontal unit area in an upward direction. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments MFR : Multifilter Radiometer Field Campaign Instruments RAD-AIR : Airborne Radiometers

310

ARM - Measurement - Shortwave narrowband total downwelling irradiance  

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

downwelling irradiance downwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave narrowband total downwelling irradiance The rate at which radiant energy, in narrow bands of wavelengths shorter than approximately 4 {mu}m, passes through a horizontal unit area in a downward direction. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments MFRSR : Multifilter Rotating Shadowband Radiometer NFOV : Narrow Field of View Zenith Radiometer

311

ARM - Measurement - Shortwave narrowband direct downwelling irradiance  

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

downwelling irradiance downwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave narrowband direct downwelling irradiance The direct unscattered radiant energy from the Sun, in a narrow band of wavelengths shorter than approximately 4 {mu}m, passing through a horizontal unit area in a downward direction. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. Field Campaign Instruments SOAR : Shipboard Oceanographic and Atmospheric Radiation

312

ARM - Measurement - Shortwave narrowband diffuse upwelling irradiance  

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

upwelling irradiance upwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave narrowband diffuse upwelling irradiance The rate at which radiant energy in narrow bands of wavelengths shorter than approximately 4 {mu}m, that has been scattered in the atmosphere at least once, passes through a horizontal unit area in an upward direction. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments MFR : Multifilter Radiometer

313

ARM - Measurement - Longwave narrowband upwelling irradiance  

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

narrowband upwelling irradiance narrowband upwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Longwave narrowband upwelling irradiance The total radiant energy, in a narrow band of wavelengths longer than approximately 4 {mu}m, passing through a horizontal unit area in an upward direction. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. Field Campaign Instruments OTTER : Twin Otter UAV-EGRETT : UAV-Egrett Value-Added Products LBTM-MINNIS : Minnis Cloud Products Using LBTM Algorithm (Process)

314

ARM - Measurement - Shortwave spectral diffuse downwelling irradiance  

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

diffuse downwelling irradiance diffuse downwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave spectral diffuse downwelling irradiance The rate at which spectrally resolved radiant energy at wavelengths shorter than approximately 4 {mu}m, that has been scattered in the atmosphere at least once, passes through a horizontal unit area in a downward direction. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments RSS : Rotating Shadowband Spectroradiometer

315

A New Shadow-Ring Device for Measuring Diffuse Solar Radiation at the Surface  

Science Conference Proceedings (OSTI)

A new shadow-ring device for measuring diffuse solar radiation at the surface is presented. In this device the seasonal variation of shadow is followed by moving the detector horizontally. This unique characteristic facilitates its application ...

Amauri P. de Oliveira; Antonio J. Machado; Joo F. Escobedo

2002-05-01T23:59:59.000Z

316

Modeling the solar thermal receiver for the CSPonD Project  

E-Print Network (OSTI)

The objective was to create an accurate steady state thermal model of a molten salt receiver prototype with a horizontal divider plate in the molten salt for Concentrated Solar Power on Demand (CSPonD). The purpose of the ...

Rees, Jennifer A. (Jennifer Anne)

2011-01-01T23:59:59.000Z

317

Impact of Cloud Cover on Solar Radiative Biases in Deep Convective Regimes  

Science Conference Proceedings (OSTI)

Conflicting claims have been made concerning the magnitude of the bias in solar radiative transfer calculations when horizontal photon transport is neglected for deep convective scenarios. The difficulty of obtaining a realistic set of cloud ...

F. Di Giuseppe; A. M. Tompkins

2005-06-01T23:59:59.000Z

318

Living Reviews in Solar Physics  

E-Print Network (OSTI)

Variations in solar activity, at least as observed in numbers of sunspots, have been apparent since ancient times but to what extent solar variability may affect global climate has been far more controversial. The subject had been in and out of fashion for at least two centuries but the current need to distinguish between natural and anthropogenic causes of climate change has brought it again to the forefront of meteorological research. The absolute radiometers carried by satellites since the late 1970s have produced indisputable evidence that total solar irradiance varies systematically over the 11-year sunspot cycle, relegating to history the term solar constant, but it is difficult to explain how the apparent response to the Sun, seen in many climate records, can be brought about by these rather small changes in radiation. This article reviews some of the evidence for a solar influence on the lower atmosphere and discusses some of the mechanisms whereby the Sun may produce more significant impacts than might be surmised from a consideration only of variations in total solar irradiance. This review is licensed under a Creative Commons

Joanna D. Haigh

2007-01-01T23:59:59.000Z

319

Solar-climatic statistical study  

DOE Green Energy (OSTI)

The Solar-Climatic Statistical Study was performed to provide statistical information on the expected future availability of solar and wind power at various nationwide sites. Historic data (SOLMET), at 26 National Weather Service stations reporting hourly solar insolation and collateral meteorological information, were interrogated to provide an estimate of future trends. Solar data are global radiation incident on a horizontal surface, and wind data represent wind power normal to the air flow. Selected insolation and wind power conditions were investigated for their occurrence and persistence, for defined periods of time, on a monthly basis. Information of this nature are intended as an aid to preliminary planning activities for the design and operation of solar and wind energy utilization and conversion systems. Presented in this volume are probability estimates of solar insolation and wind power, alone and in combination, occurring and persisting at or above specified thresholds, for up to one week, for each of the 26 SOLMET stations. Diurnal variations of wind power were also considered. Selected probability data for each station are presented graphically, and comprehensive plots for all stations are provided on a set of microfiche included in a folder in the back of this volume.

Bray, R.E.

1979-02-01T23:59:59.000Z

320

Solar Neutrinos  

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

Solar Neutrinos at the Conclusion of the Sudbury Neutrino Observatory Noah Oblath April 22, 2008 The study of solar neutrinos began with the idea that one could use the neutrinos...

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


321

Solar Easements  

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

In determining that the use of solar energy "can help reduce the nation's reliance upon imported fuels," Georgia encourages the development of solar-energy systems. Accordingly, under Georgia's...

322

Solar Easements  

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

Alaska's solar easement provisions are similar to those in many other states. They do not create an automatic right to sunlight. Rather, they allow parties to voluntarily enter into solar...

323

Solar Easements  

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

Idahos solar easement provisions allow for the access rights to sunlight for a solar energy device. The easement is transferred with the property title. Only a few Idaho communities have passed...

324

Solar collectors  

SciTech Connect

Practical applications of solar energy in commercial, industrial and institutional buildings are considered. Two main types of solar collectors are described: flat plate collectors and concentrating collectors. Efficiency of air and hydronic collectors among the flat plate types are compared. Also several concentrators are described, including their sun tracking mechanisms. Descriptions of some recent solar installations are presented and a list representing the cross section of solar collector manufacturers is furnished.

Cassidy, V.M.

1981-11-01T23:59:59.000Z

325

Solar project  

SciTech Connect

A solar laundry was installed on a college campus in South Carolina, including two separate systems installed in parallel. (LEW)

1983-01-01T23:59:59.000Z

326

Horizontal Drop of 21- PWR Waste Package  

SciTech Connect

The objective of this calculation is to determine the structural response of the waste package (WP) dropped horizontally from a specified height. The WP used for that purpose is the 21-Pressurized Water Reactor (PWR) WP. The scope of this document is limited to reporting the calculation results in-terms of stress intensities. This calculation is associated with the WP design and was performed by the Waste Package Design group in accordance with the ''Technical Work Plan for: Waste Package Design Description for LA'' (Ref. 16). AP-3.12Q, ''Calculations'' (Ref. 1 1) is used to perform the calculation and develop the document. The sketches attached to this calculation provide the potential dimensions and materials for the 21-PWR WP design.

A.K. Scheider

2007-01-31T23:59:59.000Z

327

Horizontal flow drilling requires focus on well control  

Science Conference Proceedings (OSTI)

Horizontal wells drilled underbalanced or while flowing must have surface equipment and a blow-out preventer stack specially designed for circulating operations. Functional well control methods for drilling horizontal wells have been developed in specific regions worldwide. Special safety equipment and procedures, however, are still required in most horizontal development applications. The challenge for horizontal drilling development and underbalanced drilling is to overcome the obstacles of government regulation, reduce pollution dangers, and improve personnel and equipment safety. Well control techniques tailored to the demands of each field can help overcome these challenges. Several well control elements must be addressed carefully on each horizontal well: drilling fluid requirements, well control procedures and equipment, and surface equipment and special considerations for handling hydrocarbons produced while drilling. The paper discusses each of these elements for underbalanced horizontal drilling.

Tangedahl, M.J. (RBOP Oil Tools International Inc., Houston, TX (United States))

1994-06-13T23:59:59.000Z

328

Temporal Structure of the Solar Radiation Field in Cloudy Conditions: Are Retrievals of Hourly Averages from Space Possible?  

Science Conference Proceedings (OSTI)

The authors examine the temporal variability of measured 415- and 611.7-nm spectral solar irradiance in cloudy stratocumulus conditions. This is accomplished by normalizing measured data by the equivalent irradiance for cloudless conditions and ...

Manuel Nunez; Kurt Fienberg; Christopher Kuchinke

2005-01-01T23:59:59.000Z

329

Shallow horizontal drilling in unconsolidated sands offshore California  

SciTech Connect

Four shallow horizontal wells were drilled from Platform C in Dos Cuadras field offshore California to recover reserves inaccessible with conventional drilling techniques. The wells had true vertical depths (TVD's) ranging from 746 to 989 ft with total horizontal displacements from 1,613 to 3,788 ft. The wells had horizontal displacement TVD ratios up to 3.95. The targets were unconsolidated, high-permeability sands. This paper details well planning, drilling, and completion.

Payne, J.D.; Bunyak, M.J. (Unocal Corp., Los Angeles, CA (United States)); Huston, C.W. (Smith International Inc., Tyler, TX (United States))

1993-12-01T23:59:59.000Z

330

Guided Horizontal Drilling: A Primer for Electric Utilities  

Science Conference Proceedings (OSTI)

This document is intended to be an introduction to guided horizontal drilling, also termed horizontal directional drilling (HDD), as an alternative construction method to open trenching for the installation of underground power cables, pipes, ducts, or conduits. It is written for an audience that includes electric power engineers, designers, operations and procurement personnel. The document introduces guided horizontal drilling technology, the equipment, and several critical aspects of operating the equ...

1997-02-18T23:59:59.000Z

331

Drilling Sideways -- A Review of Horizontal Well Technology and ...  

U.S. Energy Information Administration (EIA)

DOE/EIA-TR-0565 Distribution Category UC-950 Drilling Sideways -- A Review of Horizontal Well Technology and Its Domestic Application April 1993 Energy Information ...

332

Solar Optics  

DOE Green Energy (OSTI)

Solar opacities are presented from the center of the Sun to the photosphere. The temperatures, densities and hydrogen mass fractions are taken from the standard solar model. For the heavy element abundances the Grevesse mixture is used. In the solar interior photoabsorption is dominated by free-free absorption and they compare two sets of opacities based on two different models for the inverse bremsstrahlung. The radiative luminosities calculated from the two sets of opacities are compared with those predicted by previous models of the standard solar model and also with the known luminosity of the Sun. pressures, specific heats and the speed of sound in the solar plasma are also presented.

Rozsnyai, B.F.

2000-10-04T23:59:59.000Z

333

SOLAR MONITORING, FORECASTING, AND VARIABILITY ASSESSMENT AT SMUD NEO Virtus Engineering Inc.  

E-Print Network (OSTI)

horizontal irradiance (DHI) data. These data are compared with the 1km and 10 km grid satellite DNI on the distribution network. SMUD's grant partners and subcontractors on the project include Hawaiian Electric Company variability relationships as well as satellite based irradiance datasets. The data cleanup methods

Perez, Richard R.

334

Do Models Underestimate the Solar Contribution to Recent Climate Change?  

Science Conference Proceedings (OSTI)

Current attribution analyses that seek to determine the relative contributions of different forcing agents to observed near-surface temperature changes underestimate the importance of weak signals, such as that due to changes in solar irradiance. ...

Peter A. Stott; Gareth S. Jones; John F. B. Mitchell

2003-12-01T23:59:59.000Z

335

Solar powered desalination system  

E-Print Network (OSTI)

Desalination Systems Developers MIT BARC IMB Power Solar PVcells Solar PV cells 10 MW solar farm Solar pond FranciscoSolar Energy: PEC vs. PV Solar energy is just as important

Mateo, Tiffany Alisa

2011-01-01T23:59:59.000Z

336

Solar Power  

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

Solar Power Solar Power Project Opportunities Abound in the Region The WIPP site is receives abundant solar energy with 6-7 kWh/sq meter power production potential As the accompanying map of New Mexico shows, the WIPP site enjoys abundant year-round sunshine. With an average solar power production potential of 6-7 kWh/sq meter per day, one exciting project being studied for location at WIPP is a 30-50 MW Solar Power Tower: The American Solar Energy Society (ASES) is is a national trade association promoting solar energy as a clean source of electricity, and provides a comprehensive resource for additional information. DOE's Office of Energy Efficiency and Renewable Energy is also a comprehensive resource for more information on renewable energy.

337

Effect of Short-Term Solar Ultraviolet Flux Variability in a Coupled Model of Photochemistry and Dynamics  

Science Conference Proceedings (OSTI)

Variability in the solar ultraviolet radiative flux is known to cause changes in the chemistry and dynamics of the middle and upper atmosphere. Specifically, the 27-day solar rotation signal in irradiance has been correlated with responses in ...

Xun Zhu; Jeng-Hwa Yee; Elsayed R. Talaat

2003-02-01T23:59:59.000Z

338

Method and application of horizontal slice volumetrics to waterflood management and horizontal drilling  

SciTech Connect

A computer mapping program was used to make horizontal slices of pore volume. The goal was to create maps that showed the distribution of pore volume vertically and laterally throughout the reservoir. That information was used for studying waterflood feasibility, monitoring an existing waterflood, and planning a horizontal well. This work was done at the United States Naval Petroleum Reserve No. 1, Elk Hills, CA. The reservoirs are the Miocene aged Northwest Stevens A sands and T N sands. These sands are a series of stacked deep water turbidites draped across the western nose of a plunging anticline. To determine the reservoir sensitivity to the approach used to calculate horizontal slice volume, two methods were tested. The first involves creation of four isochores, bounded above by the sand top or base and below by the slice top or base, whose volumes are combined to give the slice volume. The second involves creation of a grid of the slice itself from which slice volume is calculated.

Deshpande, A.; Flemings, P.B. (Pennsylvania State Univ., University Park, PA (United States)); Huang, J. (Exxon Production Research Co., Houston, TX (United States))

1996-01-01T23:59:59.000Z

339

Demonstration of a utility industry horizontal drilling system: Horizontal well AMH-5 installation report  

SciTech Connect

The Department of Energy`s Office of Technology Development initiated an integrated demonstration of innovative technologies and systems for cleanup of VOCs in soils and groundwater at the Savannah River Site (SRS) in 1989. The overall goal of the program is demonstration of multiple technologies and systems in the fields of drilling, characterization, monitoring, and remediation at a single test bed. Innovative technologies are compared to one another and to baseline technologies in terms of technical performance and cost effectiveness. Transfer of successfully demonstrated technologies and systems to DOE environmental restoration organizations, to other government agencies, and to industry is a critical part of the program. Directional drilling has been shown to be a successful technique for enhancing access to the subsurface, thus improving remediation systems, especially remediation systems which perform in situ. Demonstration of an innovative directional drilling system at the Integrated Demonstration Site at the SRS, was initiated in June of 1992. The directional drilling system was designed to install an in situ remediation system. The drilling system is an experimental compaction/dry drilling technique developed by Charles Machine Works (Ditch Witch{reg_sign}) of Perry, Oklahoma. A horizontal well was installed in the M Area of the SRS below and parallel to an abandoned tile process sewer line. The installation of the horizontal well was a two-part process. Part one consisted of drilling the borehole, and part two was the horizontal well completion.

Not Available

1992-12-31T23:59:59.000Z

340

Retrieval of Key Aerosol Optical Parameters from Spectral Direct and Diffuse Irradiances Observed by a Radiometer with Nonideal Cosine Response Characteristic  

Science Conference Proceedings (OSTI)

The spectral direct and diffuse irradiances observed by a radiometer with a horizontal surface detector have been frequently used to study aerosol optical parameters, such as aerosol optical thickness (?aer) and single scattering albedo (?). Such ...

Pradeep Khatri; Tamio Takamura; Akihiro Yamazaki; Yutaka Kondo

2012-05-01T23:59:59.000Z

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


341

SOLAR REFLE TION PANELS  

Unlike other solar collectors that are known to lose solar reflectivity due to issues with their design, the solar collector

342

Solar radiation data manual for buildings  

DOE Green Energy (OSTI)

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.

Marion, W.; Wilcox, S.

1995-09-01T23:59:59.000Z

343

Solar | Department of Energy  

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

21, 2013 Solar Energy Resources Solar radiation, often called the solar resource, is a general term for the electromagnetic radiation emitted by the sun. Solar radiation can be...

345

CALIFORNIA SOLAR DATA MANUAL  

E-Print Network (OSTI)

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

Berdahl, P.

2010-01-01T23:59:59.000Z

346

Solar | Department of Energy  

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

Administration Other Agencies You are here Home Energy Sources Renewables Solar Solar July 12, 2013 California Solar Initiative - Single-Family Affordable Solar...

347

Published as: Ha T. Nguyen and Joshua M. Pearce, "Incorporating Shading Losses in Solar Photovoltaic Potential Assessment at the Municipal Scale" Solar Energy 86(5), pp. 12451260 (2012). DOI: http://dx.doi.org/10.1016/j.solener.2012.01.017  

E-Print Network (OSTI)

Photovoltaic Potential Assessment at the Municipal Scale" Solar Energy 86(5), pp. 1245­1260 (2012). DOI: http; Photovoltaic; Renewable energy; Solar energy; Solar irradiation modeling ; Shading Abbreviations (Apv, "Incorporating Shading Losses in Solar Photovoltaic Potential Assessment at the Municipal Scale" Solar Energy 86

Paris-Sud XI, Université de

348

Yaw dynamics of horizontal axis wind turbines  

DOE Green Energy (OSTI)

Designers of a horizontal axis wind turbine yaw mechanism are faced with a difficult decision. They know that if they elect to use a yaw- controlled rotor then the system will suffer increased initial cost and increased inherent maintenance and reliability problems. On the other hand, if they elect to allow the rotor to freely yaw they known they will have to account for unknown and random, though bounded, yaw rates. They will have a higher-risk design to trade-off against the potential for cost savings and reliability improvement. The risk of a yaw-free system could be minimized if methods were available for analyzing and understanding yaw behavior. The complexity of yaw behavior has, until recently, discouraged engineers from developing a complete yaw analysis method. The objectives of this work are to (1) provide a fundamental understanding of free-yaw mechanics and the design concepts most effective at eliminating yaw problems, and (2) provide tested design tools and guidelines for use by free-yaw wind systems manufacturers. The emphasis is on developing practical and sufficiently accurate design methods.

Hansen, A.C. (Utah Univ., Salt Lake City, UT (United States))

1992-05-01T23:59:59.000Z

349

Application of horizontal wells in steeply dipping reservoirs  

E-Print Network (OSTI)

A three-dimensional reservoir simulation study is performed to evaluate the impact of horizontal well applications on oil recovery from steeply dipping reservoirs. The Provincia field, located in Colombia, provided the basic reservoir information for the study. Reservoir simulation results indicate that for reservoir dip angles greater than about 40', this parameter has little or no effect on the primary recovery performance for homogeneous high-permeability reservoirs, The initial gascap size and the anisotropy of permeability (kv/kh ratio) are the dominant parameters affecting the oil recovery. For thin reservoirs, the location of the horizontal injector will not significantly affect the oil recovery. Simultaneous gas and water injection through horizontal wells can increase the oil recovery factor from almost 35% under primary production to 40%. A significant incremental oil recovery could be expected by employing horizontal wells for simultaneous gas and water injection. A comparison of the production performance of horizontal and vertical producers shows that a horizontal well can produce oil up to 2.5 times the oil rate of a vertical well, without a high rate of gas production. Also, the use of horizontal producers significantly accelerates the oil recovery. For the case of a homogeneous reservoir under simultaneous gas and water injection, the horizontal well system does not give a significant increment in the oil recovery compared to the vertical well system.

Lopez Navarro, Jose David

1995-01-01T23:59:59.000Z

350

The Foundation and Application of Horizontal Well Deliverability Type Curves  

Science Conference Proceedings (OSTI)

As a development technique to improve oil and gas deliverability, horizontal wells have recently become an important technical support to develop low permeability or extra-low permeability and unconventional oil and gas fields. Therefore, it is quite ... Keywords: Horizontal well, Impermeable and circular boundary reservoir, Stehfest numerical inversion, Blasingame decline curves, Single well dynamic reserves

Rong Wang; Yonggang Duan; Quantang Fang; Cao Tingkuan; Mingqiang Wei

2011-10-01T23:59:59.000Z

351

Horizontal Symmetries $\\Delta(150)$ and $\\Delta(600)$  

E-Print Network (OSTI)

Using group theory of mixing to examine all finite subgroups of SU(3) with an order less than 512, we found recently that only the group $\\Delta(150)$ can give rise to a correct reactor angle $\\th_{13}$ of neutrino mixing without any free parameter. It predicts $\\sin^22\\th_{13}=0.11$ and a sub-maximal atmospheric angle with $\\sin^22\\th_{23}=0.94$, in good agreement with experiment. The solar angle $\\th_{12}$, the CP phase $\\d$, and the neutrino masses $m_i$ are left as free parameters. In this article we provide more details of this case, discuss possible gain and loss by introducing right-handed symmetries, and/or valons to construct dynamical models. A simple model is discussed where the solar angle agrees with experiment, and all its mixing parameters can be obtained from the group $\\Delta(600)$ by symmetry alone. The promotion of $\\Delta(150)$ to $\\Delta(600)$ is on the one hand analogous to the promotion of $S_3$ to $S_4$ in the presence of tribimaximal mixing, and on the other hand similar to the extens...

Lam, C S

2013-01-01T23:59:59.000Z

352

Comparative study of different solar cooling systems for buildings in subtropical city  

SciTech Connect

In recent years, more and more attention has been paid on the application potential of solar cooling for buildings. Due to the fact that the efficiency of solar collectors is generally low at the time being, the effectiveness of solar cooling would be closely related to the availability of solar irradiation, climatic conditions and geographical location of a place. In this paper, five types of solar cooling systems were involved in a comparative study for subtropical city, which is commonly featured with long hot and humid summer. The solar cooling systems included the solar electric compression refrigeration, solar mechanical compression refrigeration, solar absorption refrigeration, solar adsorption refrigeration and solar solid desiccant cooling. Component-based simulation models of these systems were developed, and their performances were evaluated throughout a year. The key performance indicators are solar fraction, coefficient of performance, solar thermal gain, and primary energy consumption. In addition, different installation strategies and types of solar collectors were compared for each kind of solar cooling system. Through this comparative study, it was found that solar electric compression refrigeration and solar absorption refrigeration had the highest energy saving potential in the subtropical Hong Kong. The former is to make use of the solar electric gain, while the latter is to adopt the solar thermal gain. These two solar cooling systems would have even better performances through the continual advancement of the solar collectors. It will provide a promising application potential of solar cooling for buildings in the subtropical region. (author)

Fong, K.F.; Chow, T.T.; Lee, C.K.; Lin, Z.; Chan, L.S. [Division of Building Science and Technology, College of Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Kowloon, Hong Kong (China)

2010-02-15T23:59:59.000Z

353

Steerable vertical to horizontal energy transducer for mobile robots  

DOE Patents (OSTI)

The present invention provides a steerable vertical to horizontal energy transducer for mobile robots that less complex and requires less power than two degree of freedom tilt mechanisms. The present invention comprises an end effector that, when mounted with a hopping actuator, translates along axis (typically vertical) actuation into combined vertical and horizontal motion. The end effector, or foot, mounts with an end of the actuator that moves toward the support surface (typically a floor or the earth). The foot is shaped so that the first contact with the support surface is off the axis of the actuator. Off-axis contact with the support surface generates an on-axis force (typically resulting in vertical motion) and a moment orthogonal to the axis. The moment initiates a horizontal tumbling motion, and tilts the actuator so that its axis is oriented with a horizontal component and continued actuation generates both vertical and horizontal force.

Spletzer, Barry L. (Albuquerque, NM); Fischer, Gary J. (Albuquerque, NM); Feddema, John T. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

354

California Solar Initiative - Solar Thermal Program | Department...  

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

Solar Thermal Program California Solar Initiative - Solar Thermal Program Eligibility Commercial Fed. Government Industrial Local Government Low-Income Residential Multi-Family...

355

Solar Decathlon  

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

U.S. Department of Energy U.S. Department of Energy Solar Decathlon Sara Farrar-Nagy National Renewable Energy Laboratory sara.farrar-nagy@nrel.gov, 303-384-7514 April 3, 2013 Solar Decathlon 2009 Solar Decathlon 2011 Solar Decathlon 2013 & XPO Washington, D.C. Washington, D.C. Irvine, California 2 | Building Technologies Office eere.energy.gov Purpose & Objectives Problem Statement: How to provide workforce training, improve building science instruction, foster innovation in whole-building design, and

356

Solar News  

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

news Office of Energy Efficiency & Renewable news Office of Energy Efficiency & Renewable Energy Forrestal Building 1000 Independence Avenue, SW Washington, DC 20585 en Energy Department Announces $19 Million to Drive Down Solar Soft Costs, Increase Hardware Efficiency http://energy.gov/eere/articles/energy-department-announces-19-million-drive-down-solar-soft-costs-increase-hardware solar-soft-costs-increase-hardware" class="title-link">Energy Department Announces $19 Million to Drive Down Solar Soft Costs, Increase Hardware Efficiency

357

Solar Cells  

Science Conference Proceedings (OSTI)

Mar 5, 2013 ... Here we are using microwaves for increasing the surface area of titania nanopowders for energy based applications like dye sensitized solar...

358

Building Energy Software Tools Directory: Solar Tool  

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

Solar Tool Solar Tool Solar Tool logo. Makes the process of accurately sizing and positioning overhangs, shading devices and louvers easy. This software is a must for architects, planners and building services engineers, anyone who needs to quickly determine the extent of solar penetration into buildings, overshadowing or the most appropriate means of shading a window. The program uses a flexible, parametric model on which can be placed any number of horizontal, vertical and detached shades. You can select any date, time or location, seeing immediately the resulting shadows whilst interactively manipulating the geometry to show immediately the effects. You can also choose to automatically optimise the size and shape of any shading device over any range of dates and times you require. Screen Shots

359

Calculation of the Solar UV/EUV Spectrum in Spherical Symmetry  

E-Print Network (OSTI)

We present work in progress concerning spectral synthesis calculations of the solar UV/EUV in spherical symmetry carried out with the Solar Radiation Physical Modeling (SRPM) project. We compare the synthetic irradiance spectrum for the quiet Sun with the recent solar minimum spectrum taken with the EVE rocket instrument. The good agreement of the synthetic spectrum with the observation shows that the employed atmosphere structures are suitable for irradiance calculations.

Haberreiter, Margit

2009-01-01T23:59:59.000Z

360

SOLAR RADIATION DURABILITY OF MATERIALS, COMPONENTS AND SYSTEMS FOR PHOTOVOLTAICS  

E-Print Network (OSTI)

. Discussions at the NREL PV reliability workshop in 2011 came to the conclusion that while initial performance as a function of total absorbed solar radiation dose. In a reliability engineering framework, these quantitative and published data, comparisons have been made showing the reduction of solar irradiance incident on the PV

Rollins, Andrew M.

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


361

Solar Resource Characterization; Session: Modeling and Analysis (Presentation)  

DOE Green Energy (OSTI)

This project supports the Solar America Initiative by: (1) meeting increasing demands for expertise in and products on solar radiation data and models--production and distribution of reliable, accurate domestic and international solar resource data, benchmarking and cross-comparison of solar irradiance models; and coordination with the international community (IEA/SHC Task 36, WMO); (2) reducing data uncertainties and increasing temporal and spatial data resolutions; (3) developing and testing short term solar resource forecasts; (4) evaluating methods for producing long term data sets from short term observations; and (5) conducting measurement activities at selected sites.

Renne, D.

2008-04-01T23:59:59.000Z

362

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

DOE Green Energy (OSTI)

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.

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

2009-03-01T23:59:59.000Z

363

Solar astrometry: the status of art in 2011  

E-Print Network (OSTI)

Solar astrometry deals with the accurate measumerent of the solar diameter, and in general with the measurement of the shape of the Sun. During the last decades several techniques have been developed to monitor the radius and the irradiance of the Sun: meridian transits, telescopes in drift-scan mode, solar astrolabes, balloons, and satellites dedicated to the measurements of the solar diameter, and space measurements of the total solar irradiance are now performed to know the relationship radius-luminosity for the Sun in this evolutionary stage of its life. The feedback of solar astrometry in climate studies is of paramount importance. The status of art in the various fields of research here adressed is outlined.

Sigismondi, Costantino

2012-01-01T23:59:59.000Z

364

SOLAR ASTROMETRY: THE STATUS OF ART IN 2011  

E-Print Network (OSTI)

Solar astrometry deals with the accurate measumerent of the solar diameter, and in general with the measurement of the shape of the Sun. During the last decades several techniques have been developed to monitor the radius and the irradiance of the Sun: meridian transits, telescopes in drift-scan mode, solar astrolabes, balloons, and satellites dedicated to the measurements of the solar diameter, and space measurements of the total solar irradiance are now performed to know the relationship radius-luminosity for the Sun in this evolutionary stage of its life. The feedback of solar astrometry in climate studies is of paramount importance. The status of art in the various fields of research here adressed is outlined. PACS numbers: 96.60.Q-,96.60.-j, 01.65.+g, 1.

Costantino Sigismondi

2012-01-01T23:59:59.000Z

365

DOE Solar Decathlon: Solar Decathlon Videos  

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

Consumer Workshops Consumer Workshops Building Industry Workshops Technical Resources Sponsors Where Are the Houses Now? Quick Links Solar Decathlon Home Solar Decathlon 2011 Solar Decathlon 2009 Solar Decathlon 2007 Solar Decathlon 2005 Solar Decathlon 2002 Solar Decathlon 2011 Solar Decathlon Videos For video of the U.S. Department of Energy Solar Decathlon 2011, see the collections listed below or visit the U.S. Department of Energy Solar Decathlon YouTube Channel. General Solar Decathlon Videos Watch these videos to learn about the Solar Decathlon competition and event. Solar Decathlon House Video Tours Learn about each of the U.S. Department of Energy Solar Decathlon teams and their houses in these video tours. Solar Decathlon Team-Produced Videos Watch videos produced by the teams themselves for the Solar Decathlon

366

Vapor Flow to Horizontal Wells in Unsaturated Zones Hongbin Zhan* and Eungyu Park  

E-Print Network (OSTI)

Vapor Flow to Horizontal Wells in Unsaturated Zones Hongbin Zhan* and Eungyu Park ABSTRACT and vaporthree dimensional form for a horizontal-well sink in an unsaturated zone. This is done by solving; horizontal-well axis to obtain the solution of flow to a horizontal-well Zhan and Cao, 2000). Horizontal

Zhan, Hongbin

367

Fraced horizontal well shows potential of deep tight gas  

SciTech Connect

Successful completion of a multiple fraced, deep horizontal well demonstrated new techniques for producing tight gas sands. In Northwest Germany, Mobil Erdgas-Erdoel GmbH drilled, cased, and fraced the world`s deepest horizontal well in the ultra-tight Rotliegendes ``Main`` sand at 15,687 ft (4,783 m) true vertical depth. The multiple frac concept provides a cost-efficient method to economically produce significant gas resources in the ultra-tight Rotliegendes ``Main`` sand. Besides the satisfactory initial gas production rate, the well established several world records, including deepest horizontal well with multiple fracs, and proved this new technique to develop ultra-tight sands.

Schueler, S. [Mobil Erdgas-Erdoel GmbH, Celle (Germany); Santos, R. [Mobil Erdgas-Erdoel GmbH, Hamburg (Germany)

1996-01-08T23:59:59.000Z

368

SOLAR POWER  

DOE Green Energy (OSTI)

Thermal energy storage (TES) is an integral part of a concentrated solar power (CSP) system. It enables plant operators to generate electricity beyond on sun hours and supply power to the grid to meet peak demand. Current CSP sensible heat storage systems employ molten salts as both the heat transfer fluid and the heat storage media. These systems have an upper operating temperature limit of around 400 C. Future TES systems are expected to operate at temperatures between 600 C to 1000 C for higher thermal efficiencies which should result in lower electricity cost. To meet future operating temperature and electricity cost requirements, a TES concept utilizing thermochemical cycles (TCs) based on multivalent solid oxides was proposed. The system employs a pair of reduction and oxidation (REDOX) reactions to store and release heat. In the storage step, hot air from the solar receiver is used to reduce the oxidation state of an oxide cation, e.g. Fe3+ to Fe2+. Heat energy is thus stored as chemical bonds and the oxide is charged. To discharge the stored energy, the reduced oxide is re-oxidized in air and heat is released. Air is used as both the heat transfer fluid and reactant and no storage of fluid is needed. This project investigated the engineering and economic feasibility of this proposed TES concept. The DOE storage cost and LCOE targets are $15/kWh and $0.09/kWh respectively. Sixteen pure oxide cycles were identified through thermodynamic calculations and literature information. Data showed the kinetics of re-oxidation of the various oxides to be a key barrier to implementing the proposed concept. A down selection was carried out based on operating temperature, materials costs and preliminary laboratory measurements. Cobalt oxide, manganese oxide and barium oxide were selected for developmental studies to improve their REDOX reaction kinetics. A novel approach utilizing mixed oxides to improve the REDOX kinetics of the selected oxides was proposed. It partially replaces some of the primary oxide cations with selected secondary cations. This causes a lattice charge imbalance and increases the anion vacancy density. Such vacancies enhance the ionic mass transport and lead to faster re-oxidation. Reoxidation fractions of Mn3O4 to Mn2O3 and CoO to Co3O4 were improved by up to 16 fold through the addition of a secondary oxide. However, no improvement was obtained in barium based mixed oxides. In addition to enhancing the short term re-oxidation kinetics, it was found that the use of mixed oxides also help to stabilize or even improve the TES properties after long term thermal cycling. Part of this improvement could be attributed to a reduced grain size in the mixed oxides. Based on the measurement results, manganese-iron, cobalt-aluminum and cobalt iron mixed oxides have been proposed for future engineering scale demonstration. Using the cobalt and manganese mixed oxides, we were able to demonstrate charge and discharge of the TES media in both a bench top fixed bed and a rotary kiln-moving bed reactor. Operations of the fixed bed configuration are straight forward but require a large mass flow rate and higher fluid temperature for charging. The rotary kiln makes direct solar irradiation possible and provides significantly better heat transfer, but designs to transport the TES oxide in and out of the reactor will need to be defined. The final reactor and system design will have to be based on the economics of the CSP plant. A materials compatibility study was also conducted and it identified Inconel 625 as a suitable high temperature engineering material to construct a reactor holding either cobalt or manganese mixed oxides. To assess the economics of such a CSP plant, a packed bed reactor model was established as a baseline. Measured cobalt-aluminum oxide reaction kinetics were applied to the model and the influences of bed properties and process parameters on the overall system design were investigated. The optimal TES system design was found to be a network of eight fixed bed reactors at 18.75 MWth each with charge and

PROJECT STAFF

2011-10-31T23:59:59.000Z

369

Solar turbulence in earth's global and regional temperature anomalies Nicola Scafetta,1,2  

E-Print Network (OSTI)

Solar turbulence in earth's global and regional temperature anomalies Nicola Scafetta,1,2 Paolo a study of the influence of solar activity on the earth's temperature. In particular, we focus on the repercussion of the fluctuations of the solar irradiance on the temperature of the Northern and Southern

Scafetta, Nicola

370

American Solar Energy Society Proc. ASES Annual Conference, Raleigh, NC, EVALUATION OF NUMERICAL WEATHER PREDICTION  

E-Print Network (OSTI)

OF NUMERICAL WEATHER PREDICTION SOLAR IRRADIANCE FORECASTS IN THE US Richard Perez ASRC, Albany, NY, Perez to solar radiation forecasting include (1) numerical weather prediction (NWP) models that infer local cloud© American Solar Energy Society ­ Proc. ASES Annual Conference, Raleigh, NC, EVALUATION

Perez, Richard R.

371

ARM - Measurement - Longwave broadband downwelling irradiance  

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

downwelling irradiance downwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Longwave broadband downwelling irradiance The total diffuse and direct radiant energy, at wavelengths longer than approximately 4 {mu}m, that is being emitted downwards. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments BSRN : Baseline Solar Radiation Network BRS : Broadband Radiometer Station CO2FLX : Carbon Dioxide Flux Measurement Systems

372

ARM - Measurement - Shortwave broadband total downwelling irradiance  

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

downwelling irradiance downwelling irradiance ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Shortwave broadband total downwelling irradiance The total diffuse and direct radiant energy that comes from some continuous range of directions, at wavelengths between 0.4 and 4 {mu}m, that is being emitted downwards. Categories Radiometric Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments AMC : Ameriflux Measurement Component BSRN : Baseline Solar Radiation Network

373

The NOAA Integrated Surface Irradiance Study (ISIS)A New Surface Radiation Monitoring Program  

Science Conference Proceedings (OSTI)

This paper describes a new radiation monitoring program, the Integrated Surface Irradiance Study (ISIS), that builds upon and takes over from earlier NOAA networks monitoring components of solar radiation [both the visible component (SOLRAD) and ...

B. B. Hicks; J. J. DeLuisi; D. R. Matt

1996-12-01T23:59:59.000Z

374

Horizontal and Vertical Structure of the Lake Turkana Jet  

Science Conference Proceedings (OSTI)

An observational study was undertaken at selected sites in north Kenya (Turkana channel) in February 1983 and in JuneJuly 1984 to investigate the horizontal and vertical extent of the Turkana low-level jet. Observations indicate that strong ...

Joseph Hiri Kinuthia

1992-11-01T23:59:59.000Z

375

Means and Standard Deviations of Horizontal Wind Components  

Science Conference Proceedings (OSTI)

An algorithm is presented that computes a measure of horizontal wind dispersion. The algorithm features a compact, machine economic structure that removes wind direction scale discontinuities. By requiring only one pass through the input data, ...

G. R. Ackermann

1983-05-01T23:59:59.000Z

376

Horizontal Divergence Associated with Zonally Isolated Jet Streams  

Science Conference Proceedings (OSTI)

Horizontal divergence in the upper troposphere associated with zonally isolated jet streams in the climatological-mean fold for the Northern Hemisphere winter is examined by using the wind fields obtained from the NMC operational analyses in the ...

Hisashi Nakamura

1993-07-01T23:59:59.000Z

377

Diagnosing Mesoscale Vertical Motion from Horizontal Velocity and Density Data  

Science Conference Proceedings (OSTI)

The mesoscale vertical velocity is obtained by solving a generalized omega equation (? equation) using density and horizontal velocity data from three consecutive quasi-synoptic high-resolution surveys in the Alboran Sea. The Atlantic Jet (AJ) ...

Enric Palls Sanz; lvaro Videz

2005-10-01T23:59:59.000Z

378

Does Increased Horizontal Resolution Improve Hurricane Wind Forecasts?  

Science Conference Proceedings (OSTI)

The representation of tropical cyclone track, intensity, and structure in a set of 69 parallel forecasts performed at each of two horizontal grid increments with the Advanced Research Hurricane (AHW) component of the Weather and Research and ...

Christopher Davis; Wei Wang; Jimy Dudhia; Ryan Torn

2010-12-01T23:59:59.000Z

379

Does Increasing Horizontal Resolution Produce More Skillful Forecasts?  

Science Conference Proceedings (OSTI)

This paper examines the impacts of increasing horizontal resolution on the performance of mesoscale numerical weather prediction models. A review of previous studies suggests that decreasing grid spacing to approximately 10 km orless generally ...

Clifford F. Mass; David Ovens; Ken Westrick; Brian A. Colle

2002-03-01T23:59:59.000Z

380

Determination of Elastic Twist in Horizontal Axis Wind Turbines (HAWTs)  

DOE Green Energy (OSTI)

This report presents the results of a project at the Alternative Energy Institute (AEI) which measured and calculated the elastic twist of three representative composite horizontal-axis blades: Carter 300, Gougeon ESI 54, and UTRC 8 kW.

Stoddard, F.; Nelson, V.; Starcher, K.; Andrews, B.

2006-06-01T23:59:59.000Z

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


381

Refrigerant forced-convection condensation inside horizontal tubes  

E-Print Network (OSTI)

Condensing heat transfer rates inside a horizontal tube were investigated -for large quality changes across the tube. The proposed correlation is a modification of the work of Rohsenow, Webber and Ling [29]. The result of ...

Bae, Soonhoon

1968-01-01T23:59:59.000Z

382

Asymmetric Tidal Mixing due to the Horizontal Density Gradient  

Science Conference Proceedings (OSTI)

Stratification and turbulent mixing exhibit a floodebb tidal asymmetry in estuaries and continental shelf regions affected by horizontal density gradients. The authors use a large-eddy simulation (LES) model to investigate the penetration of a ...

Ming Li; John Trowbridge; Rocky Geyer

2008-02-01T23:59:59.000Z

383

Simulation studies of waterflood performance with horizontal wells.  

E-Print Network (OSTI)

??Two-and three-dimensional simulation studies have been carried out to evaluate waterflood oil recovery in a 40-acre 5-spot pattern using horizontal and vertical well systems. The (more)

Ferreira, Horacio

2012-01-01T23:59:59.000Z

384

A New Horizontal Gradient, Continuous Flow, Ice Thermal Diffusion Chamber  

Science Conference Proceedings (OSTI)

A continuous-flow, horizontal gradient, ice thermal diffusion chamber has been developed and tested for heterogeneous ice nucleation of aerosol particles under accurately controlled supersaturations and supercooling in the absence of a substrate. ...

E. M. Tomlinson; N. Fukuta

1985-12-01T23:59:59.000Z

385

On Computing the Surface Horizontal Pressure Gradient over Elevated Terrain  

Science Conference Proceedings (OSTI)

Methods are proposed for calculating the surface horizontal pressure gradient or geostrophic wind in a local area over elevated terrain from randomly spaced surface observations. These procedures avoid many of the problems associated with sea-...

Maurice Danard

1989-06-01T23:59:59.000Z

386

On Computing the Horizontal Pressure Gradient Force in Sigma Coordinates  

Science Conference Proceedings (OSTI)

Corby et al. present a finite-difference expression for the horizontal pressure gradient force in sigma coordinates that, in a barotropic atmosphere where the temperature varies linearly with logarithm of pressure, has the same net truncation ...

Maurice Danard; Qing Zhang; John Kozlowski

1993-11-01T23:59:59.000Z

387

Modeling Vertical and Horizontal Diffusivities with the Sigma Coordinate System  

Science Conference Proceedings (OSTI)

The use of diffusive terms in numerical ocean models is examined relative to different coordinate systems. The conventional model for horizontal diffusion is found to be incorrect when bottom topographical slopes are large. A new formulation is ...

George L. Mellor; Alan F. Blumberg

1985-08-01T23:59:59.000Z

388

The Response of a Uniform Horizontal Temperature Gradient to Heating  

Science Conference Proceedings (OSTI)

The response of a uniform horizontal temperature gradient to prescribed fixed heating is calculated in the context of an extended version of surface quasigeostrophic dynamics. It is found that for zero mean surface flow and weak cross-gradient ...

Maarten H. P. Ambaum; Panos J. Athanasiadis

2007-10-01T23:59:59.000Z

389

Mixed Layer Restratification Due to a Horizontal Density Gradient  

Science Conference Proceedings (OSTI)

The restratification in the surface mixed layer driven by a horizontal density gradient following a storm is examined. For a constant layer depth H and constant buoyancy gradient |bx| = M2, geostrophic adjustment leads to new stratification with ...

Amit Tandon; Chris Garrett

1994-06-01T23:59:59.000Z

390

On the Horizontal Extent of the Canada Basin Thermohaline Steps  

Science Conference Proceedings (OSTI)

Microstructure profiles of temperatures through the diffusive thermohaline staircase above the Atlantic layer core in the Canada Basin of the Arctic Ocean are used to investigate the horizontal scales of layers. Daily profiles during two periods, ...

Laurie Padman; Thomas M. Dillon

1988-10-01T23:59:59.000Z

391

Horizontal non-contact slumping of flat glass  

E-Print Network (OSTI)

This paper continues the work of M. Akilian and A. Husseini on developing a noncontact glass slumping/shaping process. The shift from vertical slumping to horizontal slumping is implemented and various technologies required ...

Sung, Edward, S.M. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

392

Wind Mixing In a Turbulent Surface Layer in the Presence of a Horizontal Density Gradient  

Science Conference Proceedings (OSTI)

The effect of a horizontal density gradient of buoyancy on the turbulent kinetic energy budget of the surface mixed layer in the ocean is discussed. The combination of a horizontal buoyancy gradient and a vertical shear of the horizontal velocity ...

Johan Rodhe

1991-07-01T23:59:59.000Z

393

Solar ponds  

DOE Green Energy (OSTI)

The different types of solar ponds are described, including the nonconvecting salt gradient pond and various saltless pond designs. Then the availability and cost of salts for salt gradient ponds are discussed and costs are compared. A simple computational model is developed to approximate solar pond performance. This model is later used to size solar ponds for district heating and industrial process heat applications. For district heating, ponds are sized to provide space conditioning for a group of homes, in different regions of the United States. Size requirement is on the order of one acre for a group of 25 to 50 homes. An economic analysis is performed of solar ponds used in two industrial process heat applications. The analysis finds that solar ponds are competitive when conventional heat sources are priced at $5 per million Btu and expected to rise in price at a rate of 10% per year. The application of solar ponds to the generation of electricity is also discussed. Total solar pond potential for displacing conventional energy sources is estimated in the range of from one to six quadrillion Btu per year in the near and intermediate future.

Jayadev, T.S.; Edesess, M.

1980-04-01T23:59:59.000Z

394

SATURATED-SUBCOOLED STRATIFIED FLOW IN HORIZONTAL PIPES  

Science Conference Proceedings (OSTI)

Advanced light water reactor systems are designed to use passive emergency core cooling systems with horizontal pipes that provide highly subcooled water from water storage tanks or passive heat exchangers to the reactor vessel core under accident conditions. Because passive systems are driven by density gradients, the horizontal pipes often do not flow full and thus have a free surface that is exposed to saturated steam and stratified flow is present.

Richard Schultz

2010-08-01T23:59:59.000Z

395

PROTRACTED LOW DOSE PHOTON AND SIMULATED SOLAR FLARE  

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

PROTRACTED LOW DOSE PHOTON AND SIMULATED SOLAR FLARE PROTRACTED LOW DOSE PHOTON AND SIMULATED SOLAR FLARE PROTON EFFECTS ON CYTOKINE/CHEMOKINE EXPRESSION AFTER WHOLE-BODY IRRADIATION Asma Rizvi 2 , George Coutrakon 1 , James M. Slater 1 , Michael J. Pecaut 1,2 and Daila S. Gridley 1,2 Departments. of 1 Radiation Medicine and 2 Biochemistry & Microbiology Loma Linda University & Medical Center, Loma Linda, CA 92354 Astronauts are exposed to low dose/low dose rate radiation (LDR) and may also be acutely irradiated during a solar particle event (SPE). The biological effects of LDR alone and when combined with a solar particle event, are not yet clearly understood. Previous studies have shown that irradiation can have adverse effects on T cells. The reactive oxygen species (ROS) that are produced as a result of radiation can alter or damage the

396

Solar Two  

DOE Green Energy (OSTI)

Solar Two is a concentrating solar power plant that can supply electric power on demand to the local utility, Southern California Edison Company. It can do so because it operates not only during sunny parts of the day, but it can store enough thermal energy from the sun to operate during cloudy periods and after dark, for up to three hours, at its rated output of 10 megawatts (MW). For the first time ever, a utility scale solar power plant can supply electricity when the utility needs it most, to satisfy the energy requirements of its customers.

Not Available

1998-04-01T23:59:59.000Z

397

Transmission of Solar Radiation by Clouds over Snow and Ice Surfaces. Part II: Cloud Optical Depth and Shortwave Radiative Forcing from Pyranometer Measurements in the Southern Ocean  

Science Conference Proceedings (OSTI)

Downward solar irradiance at the sea surface, measured on several voyages of an icebreaker in the Southern Ocean, is used to infer transmittance of solar radiation by clouds. Together with surface albedo estimated from coincident hourly sea ice ...

Melanie F. Fitzpatrick; Stephen G. Warren

2005-11-01T23:59:59.000Z

398

Identification of air pollutant sampling period using horizontal ...  

Science Conference Proceedings (OSTI)

owing to intense incoming solar radiation causing heating of earth surface and subsequent large vertical convection current. Atmospheric dilution potential.

399

Apparatus and method for the horizontal, crucible-free growth of silicon sheet crystals  

DOE Patents (OSTI)

Apparatus for continuously forming a silicon crystal sheet from a silicon rod in a noncrucible environment. The rod is rotated and fed toward an RF coil in an inert atmosphere so that the upper end of the rod becomes molten and the silicon sheet crystal is pulled therefrom substantially horizontally in a continuous strip. A shorting ring may be provided around the rod to limit the heating to the upper end only. Argon gas can be used to create the inert atmosphere within a suitable closed chamber. By use of this apparatus and method, a substantially defect-free silicon crystal sheet is formed that can be used for microcircuitry chips or solar cells.

Ciszek, Theodore F. (Evergreen, CO)

1987-01-01T23:59:59.000Z

400

Apparatus and method for the horizontal, crucible-free growth of silicon sheet crystals  

DOE Patents (OSTI)

Apparatus is provided for continuously forming a silicon crystal sheet from a silicon rod in a non-crucible environment. The rod is rotated and fed toward an RF coil in an inert atmosphere so that the upper end of the rod becomes molten and the silicon sheet crystal is pulled therefrom substantially horizontally in a continuous strip. A shorting ring may be provided around the rod to limit the heating to the upper end only. Argon gas can be used to create the inert atmosphere within a suitable closed chamber. By use of this apparatus and method, a substantially defect-free silicon crystal sheet is formed which can be used for micro-circuitry chips or solar cells.

Ciszek, T.F.

1984-09-12T23:59:59.000Z

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


401

Drilling Sideways - A Review of Horizontal Well Technology and Its Domestic Application  

Reports and Publications (EIA)

Focuses primarily on domestic horizontal drilling applications, past and present, and on salient aspects of current and near-future horizontal drilling and completion technology.

Robert F. King

1993-04-01T23:59:59.000Z

402

Solar PST | Open Energy Information  

Open Energy Info (EERE)

Solar PST Jump to: navigation, search Name Solar PST Place Bergondo, Spain Zip 15 165 Sector Solar Product Spanish company producing thermodynamic solar panels. References Solar...

403

Solar paraphotons  

E-Print Network (OSTI)

I revisit the question of production of paraphotons, or hidden photons, in the Sun and suggest that a simultaneous observations of solar flares by conventional instruments and by axion helioscopes may provide a discovery channel for paraphotons.

Troitsky, Sergey V

2011-01-01T23:59:59.000Z

404

Solar Easements  

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

In Kentucky, solar easements may be obtained for the purpose of ensuring access to direct sunlight. Easements must be expressed in writing and will become an interest in real property that may be...

405

Introduction to meteorological measurements and data handling for solar energy applications. Task IV. Development of an isolation handbook and instrument package  

DOE Green Energy (OSTI)

The following are covered: the Sun and its radiation, solar radiation and atmospheric interaction, solar radiation measurement methods, spectral irradiance measurements of natural sources, the measurement of infrared radiation, the measurement of circumsolar radiation, some empirical properties of solar radiation and related parameters, duration of sunshine, and meteorological variables related to solar energy. Included in appendices are manufacturers and distributors of solar radiation measuring instruments and an approximate method for quality control of solar radiation instruments. (MHR)

None

1980-01-01T23:59:59.000Z

406

CALIFORNIA SOLAR DATA MANUAL  

E-Print Network (OSTI)

The University of Wisconsin Interactive Solar Heating DesignProgram, , , , c, Solar Heating of Buildings and DomesticProperty Standards for Solar Heating and Domestic Hot Water

Berdahl, P.

2010-01-01T23:59:59.000Z

407

CALIFORNIA SOLAR DATA MANUAL  

E-Print Network (OSTI)

Program, , , , c, Solar Heating of Buildings and DomesticR.L. (1976): Solar Heating of Buildings and Domestic Hotthe costs. c. SOLAR HEATING OF BUILDINGS AND DOMESTIC HOT

Berdahl, P.

2010-01-01T23:59:59.000Z

408

Solar | Department of Energy  

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

October 8, 2009 DOE Announces 87 Million in Funding to Support Solar Energy Technologies Projects Aim to Accelerate Adoption of Solar Energy and Develop Solar Workforce September...

409

Solar | Department of Energy  

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

contracts which must be entered into in order to ensure uninterrupted solar access for solar energy devices. Solar easement agreements are required at a minimum to contain...

410

Solar | Department of Energy  

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

16, 2013 Solar Energy Technologies Solar energy technologies produce electricity from the energy of the sun. Small solar energy systems can provide electricity for homes,...

411

Solar | Department of Energy  

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

Solar, Wind, and Energy Efficiency Easements and Rights Laws Colorado's solar access laws, which date back to 1979, prohibit any residential covenants that restrict solar access....

412

Solar | Department of Energy  

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

loans for renewable energy and energy efficiency projects. Eligible renewable energy technologies include solar thermal, solar space heat, solar process heat,...

413

Solar | Department of Energy  

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

plan. October 16, 2013 Residential Solar and Wind Energy Systems Tax Credit Arizona's Solar Energy Credit is available to individual taxpayers who install a solar or wind...

414

Solar | Department of Energy  

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

is joining America's solar revolution. January 13, 2010 San Antonio is using these unique solar energy systems. | Photo courtesy CPS Energy San Antonio spurs increase in solar...

415

Solar forecasting review  

E-Print Network (OSTI)

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

Inman, Richard Headen

2012-01-01T23:59:59.000Z

416

Solar forecasting review  

E-Print Network (OSTI)

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

Inman, Richard Headen

2012-01-01T23:59:59.000Z

417

Solar | Department of Energy  

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

Administration Other Agencies You are here Home Energy Sources Renewables Solar Solar July 12, 2013 Austin Energy - Value of Solar Residential Rate (Texas) Austin...

418

Solar | Department of Energy  

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

Administration Other Agencies You are here Home Energy Sources Renewables Solar Solar July 12, 2013 City of Tallahassee Utilities - Solar Water Heating Rebate The...

419

Solar | Department of Energy  

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

Administration Other Agencies You are here Home Energy Sources Renewables Solar Solar July 12, 2013 Austin Utilities - Solar Rebate Program Austin Utilities provides...

420

Solar | Department of Energy  

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

Administration Other Agencies You are here Home Energy Sources Renewables Solar Solar July 12, 2013 Commonwealth Solar Hot Water Commercial Program Feasibility study...

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


421

DOE Solar Decathlon: Visit  

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

Department of Energy Solar Decathlon 2013 at the Orange Country Great Park in Irvine, California The Solar Decathlon houses and surrounding Solar Decathlon village are open to...

422

Solar | Department of Energy  

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

Consumers Power, Inc. - Solar Energy System Rebate Consumers Power, Inc. (CPI) offers rebates to its residential customers who install solar water heating systems or solar...

423

Solar | Department of Energy  

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

City of Boulder established a solar sales and use tax rebate for photovoltaic (PV) and solar water heating installations. Solar system owners may receive a rebate (essentially a...

424

Solar powered desalination system  

E-Print Network (OSTI)

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

Mateo, Tiffany Alisa

2011-01-01T23:59:59.000Z

425

A Parameterization for Computing Grid-Averaged Solar Fluxes for Inhomogeneous Marine Boundary Layer Clouds. Part I: Methodology and Homogeneous Biases  

Science Conference Proceedings (OSTI)

A method of computing grid-averaged solar radiative fluxes for horizontally inhomogeneous marine boundary layer cloud fields is presented. Its underlying assumptions are as follows: i) the independent pixel approximation (IPA) is applicable and ...

Howard W. Barker

1996-08-01T23:59:59.000Z

426

DOE Solar Decathlon: Solar Decathlon China  

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

China Logo of SD China. Solar Decathlon China is the most recent addition to the international family of Solar Decathlon competitions. Solar Decathlon China is the result of a...

427

CALIFORNIA SOLAR DATA MANUAL  

E-Print Network (OSTI)

Constant Solar Noon Solar Time Sun Cha rt Sunshine Hours Seeof people and sun creates a high potential for solar energyposition of the sun, The relationship between solar time and

Berdahl, P.

2010-01-01T23:59:59.000Z

428

CALIFORNIA SOLAR DATA MANUAL  

E-Print Network (OSTI)

Radiation in Canada. Solar Energy ~, p.153. Threlkeld, J.L.pool. As the use of solar energy becomes more widespread,a high potential for solar energy use. Solar-heated swimming

Berdahl, P.

2010-01-01T23:59:59.000Z

429

CALIFORNIA SOLAR DATA MANUAL  

E-Print Network (OSTI)

Solar Information. . . . A. Solar Spectrum. . . . . . .measure a part of the solar spectrum, usually the red andin Fig. 1 shows the solar spectrum Q Ii! N til SEA-LEVEL

Berdahl, P.

2010-01-01T23:59:59.000Z

430

The Impact of using different parameterizations of unresolved horizontal  

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

The Impact of using different parameterizations of unresolved horizontal The Impact of using different parameterizations of unresolved horizontal variability of cloud water in the CCCma GCM Cole, Jason Meteorological Service of Canada Barker, Howard Meteorological Service of Canada Li, Jiangnan Canadian Center for Climate Modelling von Salzen, Knut Category: Modeling A current area of research in atmospheric radiative transfer involves description and inclusion of unresolved cloud structure in radiative transfer models that are used in global climate models (GCMs). One way of accounting for the structure of unresolved cloud in radiative transfer models is to use the Monte Carlo Independent Column Approximation (McICA) (see the poster by H. Barker). In this poster we focus on description of unresolved horizontal variability of cloud water. By using McICA in the GCM

431

Horizontal Beam Tubes - HFIR Technical Parameters | ORNL Neutron Sciences  

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

Horizontal Beam Tubes Horizontal Beam Tubes The reactor has four horizontal beam tubes that supply the neutrons to the neutron scattering instruments. Details for each beam tube and instrument can be found on the HFIR instrument page. Each of the beam tubes that supply these instruments with neutrons is described subsequently. HB-1 and HB-3 The HB-1 and HB-3 thermal neutron beam tube designs are identical except for the length. Both are situated tangential to the reactor core so that the tubes point at reflector material and do not point directly at the fuel. An internal collimator is installed at the outboard end. This collimator is fabricated out of carbon steel and is plated with nickel. The collimator provides a 2.75-in by 5.5-in. rectangular aperture. A rotary shutter is located outboard of each of these beam tubes. The

432

MHK Technologies/Horizon Horizontal Platform | Open Energy Information  

Open Energy Info (EERE)

Horizontal Platform Horizontal Platform < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Horizon Horizontal Platform.jpg Technology Profile Primary Organization Elgen Wave Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description Horizon is an array of specialized point absorbers contained in an ultra stable floating platform The unique design of the platform causes it to be entirely unaffected by waves and swells allowing it to remain almost perfectly motionless Horizon converts energy on both the up and down strokes of the floats This oscillating bi directional motion is converted to a rotating mono directional motion by horizon s unique linear drive converters The output drive shaft is connected to a generator which in turn is connected to a transmission line laid on the ocean floor running to the utility grid on land

433

Contrast between the vertical and horizontal mercury discharge lamps  

SciTech Connect

This paper discusses the thermal behavior of a high pressure mercury lamp in a horizontal position, compared with that of a vertical lamp. The model adopted is three-dimensional, steady, and powered DC. After the model validation, we analyzed temperature fields and velocities for the case of the lamp in a horizontal position by comparing it with those of a lamp in vertical position. This setting initially fixed the wall temperature equal to 1000 K. However, the morphology of the temperature profile in the case of the horizontal lamp indicates that the temperature of the wall cannot be uniform. Thus, we have, in a second time, performed an energy balance at the wall to calculate its temperature. This aims to understand the influence of convection on the thermal properties of the source.

Ben Hamida, M. B.; Helali, H.; Araoud, Z.; Charrada, K. [Unite d'Etude des Milieux Ionises et Reactifs, IPEIM, 5019 route de Kairouan Monastir (Tunisia)

2011-06-15T23:59:59.000Z

434

MHK Technologies/Horizontal Axis Logarithmic Spiral Turbine | Open Energy  

Open Energy Info (EERE)

Horizontal Axis Logarithmic Spiral Turbine Horizontal Axis Logarithmic Spiral Turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Technology Profile Primary Organization Golden Turbines LLC Technology Resource Click here Current Technology Type Click here Axial Flow Turbine Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description A Horizontal axis Water turbine following the logarithmic spiral to generate clean electric energy from slow moving currents like rivers or ocean currents and with least impact on marine life and the environment because it doesn t require a damn or building huge structures Technology Dimensions Device Testing Date Submitted 36:09.5 << Return to the MHK database homepage

435

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

DOE Green Energy (OSTI)

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

Zhang, Yabei; Smith, Steven J.

2007-08-16T23:59:59.000Z

436

Solar heater  

SciTech Connect

The invention is a solar heater which may function as a humidifier and which has a reflector that is constructed to provide a window, and external thermal insulation. The window has a cover that is positioned to transmit solar radiation to the reflector. The top portion of the reflector has an opening, and a container is removably positioned in the opening. The reflector has a geometry that reflects a high percentage of solar energy to the container, which has a surface with high absorptance. The container has a removable lid for confining heat within the container for certain functions, such as boiling water or drying clothes. When used as a humidifier, the container is filled with water and the lid is removed.

Hill, C.W.

1981-06-23T23:59:59.000Z

437

Solar Neutrinos  

DOE R&D Accomplishments (OSTI)

The prospect of studying the solar energy generation process directly by observing the solar neutrino radiation has been discussed for many years. The main difficulty with this approach is that the sun emits predominantly low energy neutrinos, and detectors for observing low fluxes of low energy neutrinos have not been developed. However, experimental techniques have been developed for observing neutrinos, and one can foresee that in the near future these techniques will be improved sufficiently in sensitivity to observe solar neutrinos. At the present several experiments are being designed and hopefully will be operating in the next year or so. We will discuss an experiment based upon a neutrino capture reaction that is the inverse of the electron-capture radioactive decay of argon-37. The method depends upon exposing a large volume of a chlorine compound, removing the radioactive argon-37 and observing the characteristic decay in a small low-level counter.

Davis, R. Jr.; Harmer, D. S.

1964-12-00T23:59:59.000Z

438

Solar ADEPT: Efficient Solar Energy Systems  

DOE Green Energy (OSTI)

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.

None

2011-01-01T23:59:59.000Z

439

Potential for Development of Solar and Wind Resource in Bhutan  

DOE Green Energy (OSTI)

With support from the U.S. Agency for International Development (USAID), the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) produced maps and data of the wind and solar resources in Bhutan. The solar resource data show that Bhutan has an adequate resource for flat-plate collectors, with annual average values of global horizontal solar radiation ranging from 4.0 to 5.5 kWh/m2-day (4.0 to 5.5 peak sun hours per day). The information provided in this report may be of use to energy planners in Bhutan involved in developing energy policy or planning wind and solar projects, and to energy analysts around the world interested in gaining an understanding of Bhutan's wind and solar energy potential.

Gilman, P.; Cowlin, S.; Heimiller, D.

2009-09-01T23:59:59.000Z

440

Application Study of a Single House Horizontal Heating System  

E-Print Network (OSTI)

It is imperative to get new heating systems into the market and implement rate structures with heat meters for the purpose of energy conservation and environmental protection. Based on analysis of current heating technology, this paper analyzes the different forms of heating systems suited for single household metering. We introduce especially the single house horizontal spanning system and show how to select the heat flow rate of the radiator. We also study the distribution rule of the heat intermedium of horizontal heating system. To simplify the workload of engineering process and make the design more accurate, a new method for calculating the average temperature of the intermedium and the heat flow rate of this heating system is put forward. Comparison is also made between the system in question and the heating system in series. A few important questions are raised and discussed, such as the computation of combining different forms of radiators, the verification of the pipe radiation, the end of the radiator without spanning pipe, and the selection of the pipe diameter. At the same time, we study the influence of the horizontal heating system on the whole heating network, describe the characteristics of a single household horizontal heating system and the importance of its hydraulic computation, and analyze the influence of the gravitational head to this heating system. We also study the hydraulic condition of the single house horizontal system and the relationship of each party under the adjustment. In addition, the operation of single household horizontal heating system is verified in a real project, and its reliability is testified. This paper provides a method for further research on related issues of a single household metering heating system and is valuable for design, operation and management.

Hang, Y.; Ying, D.

2006-01-01T23:59:59.000Z

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


441

Concentrating Solar Power  

DOE Green Energy (OSTI)

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

Not Available

2008-09-01T23:59:59.000Z

442

Mobile Solar Tracker Facility  

Science Conference Proceedings (OSTI)

Mobile Solar Tracker Facility. ... NIST's mobile solar tracking facility is used to characterize the electrical performance of photovoltaic panels. ...

2011-11-15T23:59:59.000Z

443

Solar forecasting review  

E-Print Network (OSTI)

ASME Journal of Solar Energy Engineering (in press), 2012. [ASME Journal of Solar Energy Engineering (in press), 2012. [

Inman, Richard Headen

2012-01-01T23:59:59.000Z

444

Solar Energy Technologies Program: Solar Multimedia  

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

Energy Efficiency and Renewable Energy Energy Efficiency and Renewable Energy EERE Home Programs & Offices Consumer Information Solar Multimedia search Home EERE » SunShot Initiative » Solar Multimedia Printable Version Bookmark and Share Feature Photo of 3 solar dishes, which have reflective, square-shaped material that creates a mirror image of the sky and clouds. Each dish is anchored to the ground by a vertical pole. Solar Dish - Albuquerque, New Mexico Credit: Sandia National Laboratories/Randy Montoya Solar Technologies Photovoltaics Photovoltaics Concentrating Solar Power Concentrating Solar Power Solar Applications Residential Residential Commercial Commercial Large Installations Large Installations City and County City and County Federal Federal Manufacturing Manufacturing Development and Testing

445

Solar Energy Systems - Research - Biomimetic Solar Fuels  

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

using renewable resources such as sunlight. They also offer an enticing way to store solar energy in a very compact form. Challenges in solar fuels production lie in...

446

Solar Easements & Local Option Solar Rights Laws  

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

Utah's solar easement provisions are similar to easement provisions in many other states. Parties may voluntarily enter into written solar easement contracts that are enforceable by law. An...

447

Solar Energy: What's next for Solar Technology  

Solar Energy: Whats next for Solar Technology John P. Benner Group Leader, Electronic Materials and Devices. National Center for Photovoltaics. National Renewable ...

448

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

449

Solar: monthly global horizontal (GHI) GIS data at 40km resolution...  

Open Energy Info (EERE)

on cloud cover, atmospheric water vapor and trace gases, and the amount of aerosols in the atmosphere to calculate the monthly average daily total insolation (sun and...

450

Producing Satellite-Derived Irradiances in Complex Arid Terrain | OpenEI  

Open Energy Info (EERE)

Producing Satellite-Derived Irradiances in Complex Arid Terrain Producing Satellite-Derived Irradiances in Complex Arid Terrain Dataset Summary Description (Abstract): This paper describes a methodology to correct satellite-derived irradiances over complex terrain. The correction applies to satellite models using visible images from geostationary satellites. (Purpose): Solar model documentation Source SUNY Albany Date Released June 26th, 2003 (11 years ago) Date Updated August 29th, 2003 (11 years ago) Keywords methodology solar SWERA UNEP validation Data application/pdf icon Download Report (pdf, 690.1 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period 1999 - 2002 License License Other or unspecified, see optional comment below Comment Please cite publication as follows: Perez, R., Ineichen, P., Moore, K., Kmiecik, M., Renné, D., and George, R. 2002.Producing Satellite-Derived Irradiances in Complex Arid Terrain. ASES 2003, Austin TX and submitted for publication in Solar Energy

451

Demountable solar oven  

Science Conference Proceedings (OSTI)

A demountable solar oven includes a principal base upon which is mounted a secondary supporting base collar which contains the essential operating parts and which supports two removable arms at their base whose upper end form diametrically opposed pivots for receiving the appropriately disposed pivots of the cooking chamber. The food basket provided with similarly diametrically opposed pivots is disposed interiorly of the cooking chamber and by virtue of a weight disposed at the bottom thereof the wire basket always maintains a horizontal position irrespective of the angle of the oven itself. A transparent hemispherical cover including a shadow box indicator is disposed over the oven in the direction of the sun and a series of individual plate reflectors are hinged together by means of pins, a certain number of which pins are utilized to attach the reflectors to the oven rim. Adjustable feet are disposed at the bottom of the supporting base for adjusting the vertical position of the oven and a level indicator as well as rotationally directional indicators are provided for determining the position of the oven as desired. The disassembled parts occupy a minimum space and various of the parts can be disposed together for the disassembled unit to occupy a very small space.

Erwin, S.F.

1983-04-05T23:59:59.000Z

452

Ion Irradiation Effects  

Science Conference Proceedings (OSTI)

Oct 17, 2011 ... Materials Science Challenges for Nuclear Applications: Ion Irradiation Effects Sponsored by: MS&T Organization Program Organizers: Ram...

453

Irradiation Damage Processes  

Science Conference Proceedings (OSTI)

...R.L. Klueh, Effect of Neutron Irradiation on Properties of Steels, Properties and Selection: Irons, Steels, and High-Performance Alloys,

454

Solar collectors  

SciTech Connect

Reasons are reviewed for selection of building shapes which are very unsatisfactory from the viewpoint of making rational use of solar energy for room comfort, and to reduce room heating costs. How to make best direct use of this energy source both by better building design and building installations and more careful control of energy use in towns is examined.

Borasi, V.

1974-12-01T23:59:59.000Z

455

Solar oven  

Science Conference Proceedings (OSTI)

A portable, foldable solar oven is provided wherein the basic construction material is ordinary cardboard, some surfaces of which are coated with a reflective material. The portable oven doubles as an insulated container for keeping refrigerated foodstuffs cold while being transported to a distant site for cooking.

Golder, J.C.

1981-10-06T23:59:59.000Z

456

Solar cooker  

SciTech Connect

A solar cooking device made of a flat array of concentric mirrors tilted to focus at a small area, the array being movable mounted on a stand to be movable around a ball joint and with a carrier for a cooking vessel held by a double crank to be at the focal area of the mirrors.

Long, J. B.; Ware, R. R.

1985-12-31T23:59:59.000Z

457

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

DOE Green Energy (OSTI)

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.

Myers, D. R.

2009-03-01T23:59:59.000Z

458

ALCAR - A Model for Horizontal R&D Consortia  

DOE Green Energy (OSTI)

The ALCARTM Consortium was created to develop a low cost, non-heat treatable automotive body sheet alloy. This paper will discuss the management aspects of organizing and running a horizontal consortium for competing companies to cooperate in conducting pre-competitive research and development involving the US Department of Energy, National Laboratories, Universities and industrial consultants.

Barthold, G.B.; Das, S.K.; Hayden, H.W.

1999-03-01T23:59:59.000Z

459

Recent Interannual Variations in Solar Radiation, Cloudiness, and Surface Temperature at the South Pole  

Science Conference Proceedings (OSTI)

Incoming global solar irradiance measured at the surface at the South Pole unexpectedly decreased steadily by 15% from 1976 through 1987 during the late austral summer season, whereas no trend is apparent for September through December. February'...

Ellsworth G. Dutton; Robert S. Stone; Donald W. Nelson; Bernard G. Mendonca

1991-08-01T23:59:59.000Z

460

Localized spectral analysis of fluctuating power generation from solar energy systems  

Science Conference Proceedings (OSTI)

Fluctuations in solar irradiance are a serious obstacle for the future large-scale application of photovoltaics. Occurring regularly with the passage of clouds, they can cause unexpected power variations and introduce voltage dips to the power distribution ...

Achim Woyte; Ronnie Belmans; Johan Nijs

2007-01-01T23:59:59.000Z

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


461

Volcanic and Solar Forcing of Climate Change during the Preindustrial Era  

Science Conference Proceedings (OSTI)

The climate response to variability in volcanic aerosols and solar irradiance, the primary forcings during the preindustrial era, is examined in a stratosphere-resolving general circulation model. The best agreement with historical and proxy data ...

Drew T. Shindell; Gavin A. Schmidt; Ron L. Miller; Michael E. Mann

2003-12-01T23:59:59.000Z

462

Preliminary Investigation of Methods for Correcting for Variations in Solar Spectrum under Clear Skies  

DOE Green Energy (OSTI)

Study of two methods for correcting Isc of PV modules for variations in solar spectrum: empirical relationships based on air mass, and spectral irradiance models and PV module spectral response data.

Marion, B.

2010-03-01T23:59:59.000Z

463

Data Quality Assessment and the Long-Term Trend of Ground Solar Radiation in China  

Science Conference Proceedings (OSTI)

Solar radiation is one of the most important factors affecting climate and the environment. Routine measurements of irradiance are valuable for climate change research because of long time series and areal coverage. In this study, a set of ...

Guang-Yu Shi; Tadahiro Hayasaka; Atsumu Ohmura; Zhi-Hua Chen; Biao Wang; Jian-Qi Zhao; Hui-Zheng Che; Li Xu

2008-04-01T23:59:59.000Z

464

California Solar Initiative - Multi-Family Affordable Solar Housing...  

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

California Solar Initiative - Multi-Family Affordable Solar Housing (MASH) Program California Solar Initiative - Multi-Family Affordable Solar Housing (MASH) Program < Back...

465

SOLAR ENERGY FOR ACADEMIC INSTITUTIONS Solar Suitability Assessment  

E-Print Network (OSTI)

SOLAR ENERGY FOR ACADEMIC INSTITUTIONS Solar Suitability Assessment of Dalhousie University..................................................................................................................... 1 2 Solar Resource Assessment ........................................................................................... 2 2.1 Solar Radiation

Brownstone, Rob

466

Solar Easements and Local Option Solar Rights Laws | Department...  

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

Solar Easements and Local Option Solar Rights Laws Solar Easements and Local Option Solar Rights Laws < Back Eligibility Commercial Fed. Government Industrial Local Government...

467

DOE Solar Decathlon: News Blog Solar Decathlon 2009  

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

Skip Navigation to Main Content U.S. Department of Energy Solar Decathlon Solar Decathlon Home Blog Home Posts Tagged 'Solar Decathlon 2009' Solar Decathlon Alumni Association...

468

California Solar Initiative - Single-Family Affordable Solar...  

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

California Solar Initiative - Single-Family Affordable Solar Housing (SASH) Program California Solar Initiative - Single-Family Affordable Solar Housing (SASH) Program Eligibility...

469

DOE Solar Decathlon: News Blog Blog Archive Solar Decathlon...  

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

Architecture Comfort Zone Energy Balance Engineering Home Entertainment Hot Water Market Appeal Events Media Solar Decathlon Solar Decathlon 2009 Solar Decathlon 2011 Solar...

470

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

Open Energy Info (EERE)

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

471

Solar Kit Lessons  

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

Solar Kit Lessons Middle School Curriculum Created by Northeast Sustainable Energy Association (NESEA) Click on the links below to take you to the Chapter heading: Solar Cell Inquiry Sunshine Timer Parts of a Solar Panel Part 1 Parts of a Solar Panel Part 2 Build a Simple Ammeter Solar-Powered Battery Charger Positioning Solar Panels 1 Positioning Solar Panels 2 Properties of Solar Radiation: Reflection, Transmission, and Absorption Properties of Solar Radiation: Direct and Diffuse Light Power Maximum: An Electrical Determination Calibration Curve for a Radiation Meter Solarize a Toy Solar Cells as Control Devices Solar-Powered Electrolysis of Water and the Hydrogen Economy Solar Kit Lesson #1 Solar Cell Inquiry TEACHER INFORMATION LEARNING OUTCOME

472

Solar collector with altitude tracking  

DOE Patents (OSTI)

A device is provided for turning a solar collector about an east-west horizontal axis so that the collector is tilted toward the sun as the EWV altitude of the sun varies each day. It includes one or more heat responsive elements and a shading means aligned so that within a range of EWV altitudes of the sun during daylight hours the shading means shades the element or elements while during the rest of the daylight hours the elements or elements are heated by the sun to assume heated, stable states. Mechanical linkage between the collector and the element is responsive to the states of the element or elements to tilt the collector in accordance with variations in the EWV altitude of the sun.

Barak, Amitzur Z. (Chicago, IL)

1977-01-01T23:59:59.000Z

473

Comminuting irradiated ferritic steel  

DOE Patents (OSTI)

Disclosed is a method of comminuting irradiated ferritic steel by placing the steel in a solution of a compound selected from the group consisting of sulfamic acid, bisulfate, and mixtures thereof. The ferritic steel is used as cladding on nuclear fuel rods or other irradiated components.

Bauer, Roger E. (Kennewick, WA); Straalsund, Jerry L. (Kennewick, WA); Chin, Bryan A. (Auburn, AL)

1985-01-01T23:59:59.000Z

474

Sylcom Solar | Open Energy Information  

Open Energy Info (EERE)

research, distribution, construction, operation, maintenance of products and of Photovoltaic Solar, Thermal Solar and Solar Thermoelectric installations. References Sylcom...

475

Energy Basics: Solar Energy Technologies  

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

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

476

Energy Basics: Solar Energy Resources  

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

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

477

Kahe Plant Solar Development Guideline Manual  

Science Conference Proceedings (OSTI)

The Kahe Power Plant, owned and operated by Hawaiian Electric Company (HECO), is located in Hawaii on the western shore of the island of Oahu. The plant consists of six oil-fired thermal units located on an approximately 450-acre (182-hectare) parcel with around 75 acres (30 hectares) of land suitable for solar development. The plant is on the leeward side of Oahu, making it one of the areas with the least precipitation and the most solar irradiance on the island. In order to reduce fossil fuel oil consu...

2011-10-04T23:59:59.000Z

478

Solar Monkey | Open Energy Information  

Open Energy Info (EERE)

search Name Solar Monkey Place Irvine, California Zip 92618 Sector Solar Product Solar Monkey installs PV systems for commercial and industrial users. References Solar...

479

ESPEE Solar | Open Energy Information  

Open Energy Info (EERE)

Solar Place Bangalore, Karnataka, India Zip 560 091 Sector Solar Product Distributor of solar thermal water heating systems and PV lights. References ESPEE Solar1 LinkedIn...

480

Apex Solar | Open Energy Information  

Open Energy Info (EERE)

Apex Solar Place Sofia, Bulgaria Zip 1616 Sector Solar Product Bulgarian PV and solar thermal project developer and installer. References Apex Solar1 LinkedIn Connections...

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


481

Solar Mimizan | Open Energy Information  

Open Energy Info (EERE)

Solar Mimizan Jump to: navigation, search Name Solar Mimizan Place PARIS, France Zip 75002 Sector Solar Product Paris-based, building-integrated solar power plant developer....

482

Evolution Solar | Open Energy Information  

Open Energy Info (EERE)

Solar Place Road Town Tortola, United Kingdom Sector Solar Product British Virgin Islands-based solar energy company dedicated to establishing solar panel factories in the...

483

Marin Solar | Open Energy Information  

Open Energy Info (EERE)

Marin Solar Jump to: navigation, search Name Marin Solar Place San Rafael, California Zip 94901 Sector Solar Product Marin Solar is a residential installer of photovoltaic systems....

484

Declination Solar | Open Energy Information  

Open Energy Info (EERE)

Declination Solar Jump to: navigation, search Name Declination Solar Place San Francisco, California Sector Solar Product San Francisco solar installation firm acquired by...

485

Carlson Solar | Open Energy Information  

Open Energy Info (EERE)

Carlson Solar Jump to: navigation, search Name Carlson Solar Place California Sector Solar Product Carlson Solar is an installer of residential and small-scale commercial...

486

Aztec Solar | Open Energy Information  

Open Energy Info (EERE)

Aztec Solar Jump to: navigation, search Name Aztec Solar Place Rancho Cordova, California Zip 95742 Sector Solar Product Installer of solar hot water and pool heating systems....

487

Sereno Solar | Open Energy Information  

Open Energy Info (EERE)

Sereno Solar Jump to: navigation, search Name Sereno Solar Place Monte Sereno, California Sector Solar Product Has developed a solar passive water heating panel to be installed...

488

Solar Junction | Open Energy Information  

Open Energy Info (EERE)

Junction Jump to: navigation, search Name Solar Junction Place San Jose, California Zip CA 95131 Sector Efficiency, Solar Product Solar Junction is developing high efficiency solar...

489

Tejas Solares | Open Energy Information  

Open Energy Info (EERE)

Page Edit with form History Facebook icon Twitter icon Tejas Solares Jump to: navigation, search Name Tejas Solares Place Spain Sector Solar Product Tejas Solares is a...

490

NREL: News Feature - Super-Efficient Cells Key to Low-Cost Solar Power  

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

Super-Efficient Cells Key to Low-Cost Solar Power Super-Efficient Cells Key to Low-Cost Solar Power February 16, 2011 This photo shows eight Amonix 7700 solar power generators, those in front tilted horizontally, those in the rear tilted near vertically. Each is a huge rectangle divided into hundreds of squares holding cells and lenses. Enlarge image The Amonix 7700 Concentrated Photovoltaic (CPV) Solar Power Generators are showcasing reliability and undergoing validation-of-performance measurements at the SolarTAC facility in Aurora, Colo. Credit: Dennis Schroeder In this photo, a man in an orange safety vest and hardhat is using a laptop, with large concentrated photovoltaic generators in the background. Enlarge image A technician at SolarTAC in Aurora, CO, enters some numbers into a laptop as he monitors validation of the Amonix 7700 Solar Power Generators.

491

DOE Solar Decathlon: Team Missouri: Showing the World the Possibilities of  

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

Show-Me House at the U.S. Department of Energy Solar Decathlon 2009. Show-Me House at the U.S. Department of Energy Solar Decathlon 2009. Enlarge image Team Missouri's Show-Me House joined three other Solar Decathlon houses in Missouri University of Science and Technology's own Solar Village. The Show-Me House incorporates long, horizontal lines to reflect the state's landscape. (Courtesy of Bryan Glass) Who: Team Missouri What: Show-Me House Where: Missouri University of Science and Technology Rolla, MO 65401 Map This House Public tours: Not available Solar Decathlon 2009 Team Missouri: Showing the World the Possibilities of Solar Team Missouri's U.S. Department of Energy Solar Decathlon 2009 house returned to the Missouri University of Science and Technology campus following the competition. It was reconstructed over summer 2010 in the

492

Solar panel  

SciTech Connect

A solar panel is shown for use as a double panel window structure. It has an outer frame formed by an H-shaped extrusion that has one of its outermost legs shortened, and a pair of generally parallel legs or flanges that are inwardly directed of the frame. The outer surface of these flanges are furnished with a dual pressure-sensitive adhesive tape having a width between 1/4 inch and 1 inch. A pane of transparent material is sealed around its periphery into engagement with the adhesive tape for forming a double pane solar panel. Several modifications are also shown for exerting a mechanical locking force on at least one of the panes.

Sitzler, E.R.; Moore, F.W.

1984-06-19T23:59:59.000Z

493

The Effects of Ionizing Irradiation  

Science Conference Proceedings (OSTI)

Page 1. The Effects of Ionizing Irradiation on Liquid, Dried, and Absorbed DNA Extracts ... Page 12. Study Shipped Land Carrier Irradiation ? ...

2012-02-29T23:59:59.000Z

494

Moon's Radiation Environment and Expected Performance of Solar Cells during Future Lunar Missions  

E-Print Network (OSTI)

Several lunar missions are planned ahead and there is an increasing demand for efficient photovoltaic power generation in the moon. The knowledge of solar cell operation in the lunar surface obtained during early seventies need to be updated considering current views on solar variability and emerging space solar cell technologies. In this paper some aspects of the solar cell performance expected under variable lunar radiation environment during future space missions to moon are addressed. We have calculated relative power expected from different types of solar cells under extreme solar proton irradiation conditions and high lunar daytime temperature. It is also estimated that 2-3 % of annual solar cell degradation is most probable during the future lunar missions. We have also discussed photovoltaic power generation in long term lunar bases emphasizing technological needs such as sunlight concentration, solar cell cooling and magnetic shielding of radiation for improving the efficiency of solar cells in the lunar environment.

T. E Girish; S Aranya

2010-12-03T23:59:59.000Z

495

Comparison of transient horizontal magnetic fields in a plage region and in the quiet Sun  

E-Print Network (OSTI)

Properties of transient horizontal magnetic fields (THMFs) in both plage and quiet Sun regions are obtained and compared. Spectro-polarimetric observations with the Solar Optical Telescope (SOT) on the Hinode satellite were carried out with a cadence of about 30 seconds for both plage and quiet regions located near disk center. We select THMFs that have net linear polarization (LP) higher than 0.22%, and an area larger than or equal to 3 pixels, and compare their occurrence rates and distribution of magnetic field azimuth. We obtain probability density functions (PDFs) of magnetic field strength and inclination for both regions.The occurrence rate in the plage region is the same as for the quiet Sun. The vertical magnetic flux in the plage region is ~8 times larger than in the quiet Sun. There is essentially no preferred orientation for the THMFs in either region. However, THMFs in the plage region with higher LP have a preferred direction consistent with that of the plage-region's large-scale vertical field pattern. PDFs show that there is no difference in the distribution of field strength of horizontal fields between the quiet Sun and the plage regions when we avoid the persistent large vertical flux concentrations for the plage region. The similarity of the PDFs and of the occurrence rates in plage and quiet regions suggests that a local dynamo process due to the granular motion may generate THMFs all over the sun. The preferred orientation for higher LP in the plage indicates that the THMFs are somewhat influenced by the larger-scale magnetic field pattern of the plage.

Ryohko Ishikawa; Saku Tsuneta

2008-12-09T23:59:59.000Z

496

Solar Resource Measurements in El Paso, Texas (Equipment CRADA Only): Cooperative Research and Development Final Report, CRADA Number CRD-08-273  

SciTech Connect

Site-specific, long-term, continuous, and high-resolution measurements of solar irradiance are important for developing renewable resource data. These data are used for several research and development activities consistent with the NREL mission: establish a national 30-year climatological database of measured solar irradiances; provide high quality ground-truth data for satellite remote sensing validation; support development of radiative transfer models for estimating solar irradiance from available meteorological observations; provide solar resource information needed for technology deployment and operations.

Andreas, A.

2013-11-01T23:59:59.000Z

497

Solar Oblateness from Archimedes to Dicke  

E-Print Network (OSTI)

The non-spherical shape of the Sun has been invoked to explain the anomalous precession of Mercury. A brief history of some methods for measuring solar diameter is presented. Archimedes was the first to give upper and lower values for solar diameter in third century before Christ; we also show the method of total eclipses, used after Halleys observative campaign of 1715 eclipse; the variant of partial eclipses useful to measure different chords of the solar disk; the method of Dicke which correlates oblateness with luminous excess in the equatorial zone. PACS 95.10.Gi Eclipses, transits, and occultations-.95.30.Sf- Relativity and gravitation-95.55.Ev- Solar instruments 1. Archimedes Archimedes of Syracuse [1] gave out an evaluation of the angle subtended by the Sun with the vertex on the observers eye. He knew that a perfect determination is not possible due to the observer bias and systematic errors, so he proposed to find out the Fig. 1. Geometry of angular solar diameter measurement in case of point-like eye. Gray angle is the angular lower diameter, black angle is the upper limit. The ruler is the black horizontal line.

Costantino Sigismondi; Pietro Oliva; Piazzale Aldo Moro

2005-01-01T23:59:59.000Z

498

Solar energy collector  

DOE Patents (OSTI)

The invention relates to a solar energy collector comprising solar energy absorbing material within chamber having a transparent wall, solar energy being transmitted through the transparent wall, and efficiently absorbed by the absorbing material, for transfer to a heat transfer fluid. The solar energy absorbing material, of generally foraminous nature, absorbs and transmits the solar energy with improved efficiency.

Brin, Raymond L. (Cedar Crest, NM); Pace, Thomas L. (Albuquerque, NM)

1978-01-01T23:59:59.000Z

499

Solar neutrinos and the solar composition problem  

E-Print Network (OSTI)

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.

Carlos Pena-Garay; Aldo Serenelli

2008-11-16T23:59:59.000Z

500

Solar neutrinos and the solar composition problem  

E-Print Network (OSTI)

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.

Pena-Garay, Carlos

2008-01-01T23:59:59.000Z