Abstract
| Language | English |
|---|---|
| Pages | 495-504 |
| Number of pages | 9 |
| Journal | Solar Energy |
| Volume | 79 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Nov 2005 |
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Keywords
- Solar Radiation
- Solar Energy Systems
- Diffuse Fraction Relationships
- Calculated Radiation
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Analysis of short-term solar radiation data. / Vijayakumar, G.; Kummert, M.; Klein, S.A.; Beckman, W.A.
In: Solar Energy, Vol. 79, No. 5, 11.2005, p. 495-504.Research output: Contribution to journal › Article
TY - JOUR
T1 - Analysis of short-term solar radiation data
AU - Vijayakumar, G.
AU - Kummert, M.
AU - Klein, S.A.
AU - Beckman, W.A.
PY - 2005/11
Y1 - 2005/11
N2 - Solar radiation data are available for many locations on an hourly basis. Simulation studies of solar energy systems have generally used these hourly values to estimate long-term annual performance, although solar radiation can exhibit wide variations during an hour. Variations in solar radiation during an hour, such as on a minute basis, could result in inaccurate performance estimates for systems that respond quickly and non-linearly to solar radiation. In addition, diffuse fraction regressions and cumulative frequency distribution curves have been developed using hourly data and the accuracy of these regressions when applied to short-term radiation has not been established. The purpose of this research is to investigate the inaccuracies caused by using hourly rather than short-term (i.e., minute and 3 min) radiation data on the estimated performance of solar energy systems. The inaccuracies are determined by examination of the frequency distribution and diffuse fraction relationships for short-term solar radiation data as compared to existing regressions and by comparing calculated radiation on tilted surfaces and utilizability based on hourly and short-term radiation data.
AB - Solar radiation data are available for many locations on an hourly basis. Simulation studies of solar energy systems have generally used these hourly values to estimate long-term annual performance, although solar radiation can exhibit wide variations during an hour. Variations in solar radiation during an hour, such as on a minute basis, could result in inaccurate performance estimates for systems that respond quickly and non-linearly to solar radiation. In addition, diffuse fraction regressions and cumulative frequency distribution curves have been developed using hourly data and the accuracy of these regressions when applied to short-term radiation has not been established. The purpose of this research is to investigate the inaccuracies caused by using hourly rather than short-term (i.e., minute and 3 min) radiation data on the estimated performance of solar energy systems. The inaccuracies are determined by examination of the frequency distribution and diffuse fraction relationships for short-term solar radiation data as compared to existing regressions and by comparing calculated radiation on tilted surfaces and utilizability based on hourly and short-term radiation data.
KW - Solar Radiation
KW - Solar Energy Systems
KW - Diffuse Fraction Relationships
KW - Calculated Radiation
UR - http://dx.doi.org/10.1016/j.solener.2004.12.005
U2 - 10.1016/j.solener.2004.12.005
DO - 10.1016/j.solener.2004.12.005
M3 - Article
VL - 79
SP - 495
EP - 504
JO - Solar Energy
T2 - Solar Energy
JF - Solar Energy
SN - 0038-092X
IS - 5
ER -