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Equipment Only - Solar Resources Measurements at the University of Texas at Austin, TX: Cooperative Research and Development Final Report, CRADA Number CRD-07-222

Description: Faculty and staff at the University of Texas at Austin collected solar resource measurements at their campus using equipment on loan from the National Renewable Energy Laboratory. The equipment was used to train students on the operation and maintenance of solar radiometers and was returned to NREL's Solar Radiation Research Laboratory upon completion of the CRADA. The resulting data augment the solar resource climatology information required for solar resource characterizations in the U.S. The… more
Date: January 1, 2013
Creator: Stoffel, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NREL Pyrheliometer Comparisons: 22 September - 3 October 2008

Description: NREL Pyrheliometer Comparisons (NPCs) are held annually at the Solar Radiation Research Laboratory (SRRL) in Golden, Colorado. Open to all pyrheliometer owner/operators, the NPC provides an opportunity to determine the unique WRR transfer factor for each participating pyrheliometer. This paper reports on the results of NPC-2008, which was scheduled from September 22 to October 3, 2008.
Date: February 1, 2009
Creator: Stoffel, T. & Reda, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

Pyrgeometer Calibration for DOE-Atmospheric System Research Program Using NREL Method

Description: Presented at the DOE-Atmospheric System Research Program, Science Team Meeting, 15-19 March 2010, Bethesda, Maryland. The presentation: Pyrgeometer Calibration for DOE-Atmospheric System Research program using NREL Method - was presented by Ibrahim Reda and Tom Stoffel on March 15, 2010 at the 2010 ASR Science Team Meeting. March 15-19, 2010, Bethesda, Maryland.
Date: March 15, 2010
Creator: Reda, I. & Stoffel, T.
Item Type: Refine your search to only Presentation
Partner: UNT Libraries Government Documents Department
open access

U.S. Department of Energy Workshop Report: Solar Resources and Forecasting

Description: This report summarizes the technical presentations, outlines the core research recommendations, and augments the information of the Solar Resources and Forecasting Workshop held June 20-22, 2011, in Golden, Colorado. The workshop brought together notable specialists in atmospheric science, solar resource assessment, solar energy conversion, and various stakeholders from industry and academia to review recent developments and provide input for planning future research in solar resource character… more
Date: June 1, 2012
Creator: Stoffel, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solar Resource Measurements in 1400 JR Lynch Street, Jackson, Mississippi: Cooperative Research and Development Final Report, CRADA Number CRD-07-254

Description: 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: Equipment will be used by Jackson State University for solar radiation data monitoring. This is a continuing effort of the Historically Black Colleges and Universities Solar Measurement Network; Provide high quality ground-truth data for satellite remo… more
Date: January 1, 2014
Creator: Stoffel, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solar and Infrared Radiation Station (SIRS) Handbook

Description: The Solar Infrared Radiation Station (SIRS) provides continuous measurements of broadband shortwave (solar) and longwave (atmospheric or infrared) irradiances for downwelling and upwelling components. The following six irradiance measurements are collected from a network of stations to help determine the total radiative flux exchange within the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) Climate Research Facility: • Direct normal shortwave (solar beam) • Diffuse horizont… more
Date: July 1, 2005
Creator: Stoffel, T
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Insolation data manual: long-term monthly averages of solar radiation, temperature, degree-days and global anti K/sub T/ for 248 national weather service stations

Description: Monthly averaged data is presented which describes the availability of solar radiation at 248 National Weather Service stations. Monthly and annual average daily insolation and temperature values have been computed from a base of 24 to 25 years of data. Average daily maximum, minimum, and monthly temperatures are provided for most locations in both Celsius and Fahrenheit. Heating and cooling degree-days were computed relative to a base of 18.3/sup 0/C (65/sup 0/F). For each station, global anti… more
Date: October 1, 1980
Creator: Knapp, C L; Stoffel, T L & Whitaker, S D
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measuring and modeling solar irradiance on vertical surfaces

Description: This report presents the first evaluations of 5 algorithms for converting global horizontal and direct normal solar irradiance components to global irradiance on tilted surfaces using measurements from the Solar Radiation Research Laboratory (SRRL) at SERI. High resolution (15-min) measurements from 8 thermopile radiometers oriented vertically in the 4 cardinal directions were available for a 169-day period ending 31 December 1984. Concurrent measurements of global horizontal and direct normal … more
Date: July 1, 1986
Creator: Maxwell, Eugene L.; Stoffel, T. L. & Bird, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of solar radiation measurement systems: EPRI/NREL final test report. Volume 1

Description: Measured solar radiation resource data are needed by electric utilities to evaluate the potential of renewable energy options like photovoltaics in their service territory. In this final test report, we document a cooperative project of the Electric Power Research Institute (EPRI) and the National Renewable Energy Laboratory (NREL) to compare available measurement system options for performing solar radiation resource assessments. We present the detailed results of a 6-month field comparison of… more
Date: November 1, 1992
Creator: Stoffel, T.; Riordan, C. & Bigger, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NREL Pyrheliometer Comparisons (NPC-2002), September 23 - October 4, 2002, Golden, Colorado

Description: NREL Pyrheliometer Comparisons (NPCs) are held annually at the Solar Radiation Research Laboratory (SRRL) in Golden, Colorado. Open to all pyrheliometer owner/operators, the NPC provides an opportunity to determine the unique WRR transfer factor for each participating pyrheliometer.
Date: September 1, 2003
Creator: Reda, I.; Stoffel, T. & Wilcox, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NREL Pyrheliometer Comparisons (NPC-2003), September 22 - October 3, 2003, Golden, Colorado

Description: NREL Pyrheliometer Comparisons (NPCs) are held annually at the Solar Radiation Research Laboratory (SRRL) in Golden, Colorado. Open to all pyrheliometer owner/operators, the NPC provides an opportunity to determine the unique WRR transfer factor for each participating pyrheliometer.
Date: July 1, 2004
Creator: Stoffel, T.; Reda, I. & Wilcox, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Results of NREL Pyrheliometer Comparisons (NPC1999), October 4-10, 1999, Golden, Colorado

Description: NREL Pyrheliometer Comparisons (NPCs) are held annually at the Solar Radiation Research Laboratory (SRRL) in Golden, Colorado. Open to all pyrheliometer owner/operators, the NPC provides an opportunity to determine the unique WRR transfer factor for each participating pyrheliometer.
Date: September 1, 2000
Creator: Reda, I.; Stoffel, T. & Wilcox, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NREL Pyrheliometer Comparisons (NPC-2001), September 24 - October 5, 2001, Golden, Colorado

Description: NREL Pyrheliometer Comparisons (NPCs) are held annually at the Solar Radiation Research Laboratory (SRRL) in Golden, Colorado. Open to all pyrheliometer owner/operators, the NPC provides an opportunity to determine the unique WRR transfer factor for each participating pyrheliometer.
Date: September 1, 2003
Creator: Reda, I.; Stoffel, T. & Wilcox, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of Solar Radiation Measurement Systems: EPRI/NREL Final Test Report,Volume 1

Description: Measured solar radiation resource data are needed by electric utilities to evaluate the potential of renewable energy options like photovoltaics in their service territory. In this final test report, we document a cooperative project of the Electric Power Research Institute (EPRI) and the National Renewable Energy Laboratory (NREL) to compare available measurement system options for performing solar radiation resource assessments. We present the detailed results of a 6-month field comparison of… more
Date: November 1, 1992
Creator: Stoffel, T.; Riordan, C. & Bigger, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

National Renewable Energy Laboratory Pyrheliometer Comparisons: 24 September - 5 October 2012 (NPC-2012)

Description: The NREL Pyrheliometer Comparisons for 2012 (NPC-2012) were held at the Solar Radiation Research Laboratory in Golden, Colorado, from September 24 through October 5 for the purpose of transferring the World Radiometric Reference (WRR) to participating instrument. Twenty scientists and engineers operated 32 absolute cavity radiometers and 18 conventional thermopile-based pyrheliometers to simultaneously measure clear-sky direct normal irradiance during the comparisons. The transfer standard grou… more
Date: May 1, 2013
Creator: Stoffel, T. & Reda, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solar Resource Measurements in Cocoa, Florida (FSEC) - Equipment Loaned to NREL: Cooperative Research and Development Final Report, CRADA Number CRD-08-318

Description: Site-specific measurements of global and diffuse solar irradiance components, passively separated by alternate shading and unshading of a pyranometer mounted under a shading band with alternating opaque and open panels (for a site other than NREL) are needed to verify the underlying theory and mathematical techniques for developing direct, global and diffuse renewable resource data from such a system. These data are used for several research and development activities consistent with the NREL m… more
Date: January 1, 2014
Creator: Stoffel, T. & Afshin, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Equipment Loan: Cooperative Research and Development Final Report, CRADA Number CRD-07-250

Description: 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 av… more
Date: August 1, 2013
Creator: Stoffel, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solar Resources Measurements in Houston, TX -- Equipment Only: Cooperative Research and Development Final Report, CRADA Number CRD-06-204

Description: Loaning Texas Southern University equipment in order to perform site-specific, long-term, continuous, and high-resolution measurements of solar irradiance is important for developing renewable resource data. These data are used for several research and development activities consistent with the NREL mission: (1) establish a national 30-year climatological database of measured solar irradiances; (2) provide high quality ground-truth data for satellite remote sensing validation; (3) support devel… more
Date: September 1, 2012
Creator: Stoffel, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Photovoltaic Advanced Research and Development Project: Solar Radiation Research Annual Report, 1 October 1990-30 September 1991

Description: This report is a summary of the year 1991 research activities and results under the Solar Radiation Research task of the Photovoltaic (PV) Advanced Research and Development project at the National Renewable Energy Laboratory (NREL). This task directly supports the characterization, testing, and design of PV cells modules, and systems. The development of a scientific and engineering understanding of incident (i.e., available to PV devices) solar irradiance and the appropriate instrumentation sys… more
Date: October 1, 1992
Creator: Hulstrom, R.; Cannon, T.; Stoffel, T. & Riordan, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of Photodiode and Thermopile Pyranometers for Photovoltaic Applications: Preprint

Description: Accurately determining PV module performance in the field requires measurement of solar irradiance reaching the PV panel at a high level of accuracy and known uncertainty. Silicon detectors used in various solar energy measuring instruments including reference cells are potentially an attractive choice for multiple reasons that include faster responsivity than thermopile detectors, cheaper cost and lower maintenance. The main drawback though is the fact that the silicon detectors are only spect… more
Date: September 1, 2012
Creator: Sengupta, M.; Gotseff, P. & Stoffel, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Proceedings of the International Energy Agency Conference on Pyranometer Measurements: Final Report; 16 - 20 March 1981, Boulder, Colorado

Description: A conference of pyranometry measurement experts from seven nations was held 16-20 March 1981 in Boulder, Colorado, USA, under the auspices of the International Energy Agency, the United States Department of Energy, and the Solar Energy Research Institute. This report documents the technical presentations, background, and the results and recommendations of the conference.
Date: October 1, 1982
Creator: Riches, M. R.; Stoffel, T. L. & Wells, C. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Introducing an Absolute Cavity Pyrgeometer (ACP) for Improving the Atmospheric Longwave Irradiance Measurement (Poster)

Description: Advancing climate change research requires accurate and traceable measurement of the atmospheric longwave irradiance. Current measurement capabilities are limited to an estimated uncertainty of larger than +/- 4 W/m2 using the interim World Infrared Standard Group (WISG). WISG is traceable to the Systeme international d'unites (SI) through blackbody calibrations. An Absolute Cavity Pyrgeometer (ACP) is being developed to measure absolute outdoor longwave irradiance with traceability to SI using… more
Date: March 2012
Creator: Reda, I. & Stoffel, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SERI Solar Radiation Resource Assessment Project: Fiscal Year 1990 Annual Progress Report

Description: The purpose of the Solar Radiation Resource Project is to help meet the needs of the public, government, industry, and utilities for solar radiation data, models, and assessments as required to develop, design, deploy, and operate solar energy conversion systems. The project scientists produce information on the spatial (geographic), temporal (hourly, daily, and seasonal), and spectral (wavelength distribution) variability of solar radiation at different locations in the United States. Resource… more
Date: July 1, 1991
Creator: Riordan, C.; Maxwell, E.; Stoffel, T.; Rymes, M. & Wilcox, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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