Correlating beam radiation with sunshine duration

Journal Article · Wed Jan 01 00:00:00 EST 1992 · Solar Energy (Journal of Solar Energy Science and Engineering); (United States)

DOI:https://doi.org/10.1016/0038-092X(92)90132-T· OSTI ID:5118769

Hussain, M ^[1]

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1. Univ. of Dhaka (Bangladesh)

For seven locations in north and central India, monthly averaged data of daily beam irradiation on a horizontal surface, I, have been correlated with bright sunshine duration, s, using the relation (I/I{sub o}) = b{sub o}(s/S{prime}) where I{sub o} is the monthly mean value of extraterrestrial irradiation over a day, S{prime} is the corresponding duration over which Campbell-Stokes type sunshine recorders remain sensitive. It is found that b{sub o} is a constant that is period and region dependent. Monthly estimates of beam radiation using the relation above show that for the seven stations rms errors are within 3-6%. Tests made for other stations in India also gave good estimates. For the computation of I, global radiation is not required unlike most estimation techniques and therefore the method should find a wide application. It may be observed that b{sub o} values turn out to be roughly equal to exp({minus}md{sub R}T{sub L}) where m is the relative airmass, d{sub R} is the Raleigh optical thickness and T{sub L} is the Linke turbidity factor.

• OSTI ID: 5118769
• Journal Information: Solar Energy (Journal of Solar Energy Science and Engineering); (United States), Vol. 48:3; ISSN 0038-092X
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
DIFFUSE SOLAR RADIATION
CALCULATION METHODS
DIRECT SOLAR RADIATION
INDIA
FLAT PLATE COLLECTORS
PERFORMANCE
SOLAR COLLECTORS
SOLAR CONCENTRATORS
ASIA
DEVELOPING COUNTRIES
EQUIPMENT
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SOLAR EQUIPMENT
SOLAR FLUX
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140100* - Solar Energy- Resources & Availability
990200 - Mathematics & Computers