| Description |
1 online resource (6 p.) : col. ill. |
| Series |
NREL/CP ; 5500-50936 |
|
Conference paper (National Renewable Energy Laboratory (U.S.)) ; 5500-50936.
|
| System Details |
Full text available via Internet in .pdf format. Adobe Acrobat Reader required. |
| Note |
Title from title screen (viewed April 25, 2011). |
|
"April 2011." |
|
"To be presented at SOLAR 2011, Raleigh, North Carolina, May 17-21, 2011." |
| Summary |
Inexpensive broadband pyranometers with silicon photodiode detectors have a non-uniform spectral response over the spectral range of 300-1100 nm. The response region includes only about 70% to 75% of the total energy in the terrestrial solar spectral distribution from 300 nm to 4000 nm. The solar spectrum constantly changes with solar position and atmospheric conditions. Relative spectral distributions of diffuse hemispherical irradiance sky radiation and total global hemispherical irradiance are drastically different. This analysis convolves a typical photodiode response with SMARTS 2.9.5 spectral model spectra for different sites and atmospheric conditions. Differences in solar component spectra lead to differences on the order of 2% in global hemispherical and 5% or more in diffuse hemispherical irradiances from silicon radiometers. The result is that errors of more than 7% can occur in the computation of direct normal irradiance from global hemispherical irradiance and diffuse hemispherical irradiance using these radiometers. |
| Bibliography |
Includes bibliographical references (p. 5-6). |
| Funding |
DE-AC36-08GO28308 |
| Subject |
Solar radiation -- Measurement.
|
|
Spectral irradiance -- Measurement.
|
|
Radiometers.
|
| Added Author |
National Renewable Energy Laboratory (U.S.)
|
| Gpo Item No. |
0430-P-04 (online) |
| Sudoc No. |
E 9.17:NREL/CP-5500-50936 |
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