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On the measurement of clear day solar irradiance components at Islamabad

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  • Akhter, P.
  • Baig, A.
  • Mufti, A.

Abstract

An experiment has been designed where only one instrument (pyranometer) has been used to record direct, total and global irradiances on an half hourly basis on every 15th or nearest clear day of each month and on four special days when the sun was passing through an equinox or solstice. The results have been exploited to calculate the diffuse components of total, diffuse and direct components of global radiation, their percentages and sun hour durations, etc. The correlations between the length of the day, sun hours and noontime intensities of different components have been discussed. Also a simple approach has been developed to observe the changes in the clear day atmospheric turbidity over the day and also over the year.

Suggested Citation

  • Akhter, P. & Baig, A. & Mufti, A., 1992. "On the measurement of clear day solar irradiance components at Islamabad," Renewable Energy, Elsevier, vol. 2(2), pages 175-179.
    • Handle: RePEc:eee:renene:v:2:y:1992:i:2:p:175-179
    DOI: 10.1016/0960-1481(92)90103-A
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