Dependence on wavelength of the diurnal variation of the monthly mean hourly values of global radiation on horizontal surfaces

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Solar Energy (Journal of Solar Energy Science and Engineering); (United States)

DOI:https://doi.org/10.1016/0038-092X(94)90488-X· OSTI ID:7207821

Soler, A ^[1]

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1. Escuela Tecnica Superior de Arquitectura, Madrid (Spain)

We studied the dependence on wavelength [lambda] of the [bar r][sub [lambda]] = [bar I][sub [lambda]]/[bar H][sub [lambda]] versus [bar S][sub o] plots, [bar I][sub [lambda]] and [bar H][sub [lambda]], respectively being the monthly mean hourly and daily values of global radiation for each wavelength considered, and [bar S][sub o] being the monthly mean daily number of maximum possible sunshine hours. Values of [bar I][sub [lambda]] correspond to Uccle (50[degrees]48[prime]N, 4[degrees]21[prime]E) and were obtained in 1980 for [lambda] = 315, 400, 446, 545, 646, 730, 816, and 914 nm. The [bar r][sub [lambda]] versus [bar S][sub o] plots clearly depend on wavelength. For [lambda] = 400 nm, the [bar r][sub [lambda]] versus [bar S][sub o] plots are practically identical to the usual [bar r] versus [bar S][sub o] plots, as obtained when all wavelengths for which global radiation is received are considered. The [bar r][sub [lambda]] versus [bar S][sub o] plots for [lambda] = 315 nm lie far apart from those for other wavelengths. When individual values before and after the solar noon are studied instead of mean values of global radiation, asymmetries are clearly observed for all the months, only for [lambda] = 315 nm.

• OSTI ID: 7207821
• Journal Information: Solar Energy (Journal of Solar Energy Science and Engineering); (United States), Journal Name: Solar Energy (Journal of Solar Energy Science and Engineering); (United States) Journal Issue: 3 Vol. 52:3; ISSN 0038-092X; ISSN SRENA4
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140100* -- Solar Energy-- Resources & Availability
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ASYMMETRY COEFFICIENTS
DAILY VARIATIONS
MONTHLY VARIATIONS
NUMERICAL SOLUTION
RADIATIONS
SOLAR RADIATION
STELLAR RADIATION
VARIATIONS
WAVELENGTHS