Estimation of monthly average hourly global and diffuse irradiation
Jain, P. C.
1988 Solar & Wind Technology, 5(1): 7-14
Jain, P. C., (1988), "Estimation of monthly average hourly global and diffuse irradiation", Solar & Wind Technology, 5(1): 7-14.
Abstract:
Hourly solar irradiation data of Montreal are analysed. Eleven-year (1964-1975) monthly average values of the ratio hourly/daily of the global as well as the diffuse irraduation on a horizontal plane are plotted against the solar time for each of the 12 months. The normal distribution curve recently suggested by the author (P. C. Jain, Solar Wind Technol. 2) for analysing the hourly global irradiation data of Trieste, is found to fit both the data fairly well. The mean of the normal curve is taken at the solar noon. The [sigma] values are obtained by matching the experimental and the theoretical values at the solar noon. These [sigma] values are found to be related to by the equation for the global irradiation and by the equation for the diffuse irradiation, with excellent coefficients of correlation. The technique is simple, fairly accurate and appears to be universally applicable.
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