Total Solar Radiation Data Research Articles

A study of Canadian diffuse and total solar radiation data—I Monthly average daily horizontal radiation

The correlation between diffuse and total horizontal radiation is reviewed and examined for data on the monthly average daily horizontal radiation collected at several Canadian stations. A regional correlation is developed based on Toronto-Montreal and Goose Bay data, which is valid for a large region. A solar building heat simulation study was performed using regional correlations. (SPH)

A study of Canadian diffuse and total solar radiation data—II Monthly average hourly horizontal radiation

The correlation between diffuse and total horizontal radiation is reviewed and examined for data on the monthly average daily horizontal radiation collected at several Canadian stations. A regional correlation is developed based on Toronto-Montreal and Goose Bay data, which is valid for a large region. A solar building heat simulation study was performed using regional correlations. (SPH)

The determination of hourly values of total solar radiation from daily summations

Curves, based on measured total (direct plus sky) solar radiation data for several stations in the Union of South Africa, are presented which enable the hourly distribution of total solar radiation on a horizontal surface to be determined for any locality, and any time of year on a long-term basis. In addition a graph is given showing the fraction of the daily total radiation which is received between stated hours, together with curves for four stations for estimating the difference between morning and afternoon total radiation for hour-pairs symmetrical about noon. Although based on South African solar radiation data, the curves are presented in a form convenient for use, as a first approximation, for localities anywhere in the world, and for any time of year. They are applicable for long-term averages as well as for cloudless days.