AN IMPROVED CORRELATION FOR ESTIMATING SOLAR-RADIATION FROM BRIGHT SUNSHINE DATA FOR TURKEY

1991-01-01
TASDEMIROGLU, E
Sever, Ramazan
The following quadratic equation was previously developed to estimate the monthly average solar radiation in any place in Turkey: = a + b tc {sup 2} where is the ratio of the monthly averages of the bright sunshine to the length of the day, a and b are constants that depend on location. The measured solar radiation and bright sunshine data from two stations, totalling 1842 days, were used to evaluate the constants. In 1982 the State Meteorological Office of Turkey started solar radiation measurements in six climatologically different regions with Epply precision pyranometers. The duration of sunshine has also been recorded in the same locations with Campbell-Stokes type instruments since 1966. However, the solar radiation measurement program was later abandoned due to systematic measurement errors observed in the instruments. We have checked these data and have taken only those from reliable months. In this study, we have used the data to improve the value of regression coefficients of the equation.
ENERGY CONVERSION AND MANAGEMENT

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Citation Formats
E. TASDEMIROGLU and R. Sever, “AN IMPROVED CORRELATION FOR ESTIMATING SOLAR-RADIATION FROM BRIGHT SUNSHINE DATA FOR TURKEY,” ENERGY CONVERSION AND MANAGEMENT, pp. 599–600, 1991, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/62693.