Modeling the influence of cloudiness on diffuse horizon-tal irradiation under various sky conditions in Nigeria
作者: Samuel NwokoloJulie Ogbulezie
作者单位: 1University of Calabar.
刊名: International Journal of Physical Research, 2017, Vol.5 (2), pp.91-100
来源数据库: Science Publishing Corporation
DOI: 10.14419/ijpr.v5i2.8312
关键词: Equatorial LineDiffuse FractionClearness IndexDiffuse Horizontal IrradiationSky Conditions
原始语种摘要: In this study, modeling the influence of cloudiness on diffuse horizontal irradiation (DHI) in six tropical ecological zones in Nigeria (Latitude 4.75-13.067oN and Longitude 3.333-13.16oE) using 22-year data (July 1983- June 2005) was analysed for all sky and clear sky conditions. The result revealed that the absorption of DHI in the global horizontal irradiation (GHI) portion of the solar spectrum is greatly enhanced in the Southern tropical zones as a result of heavy presence of smog, cloudiness, and high water vapour parameters such as relative humidity, dew point temperature and precipitable water thereby increasing the diffuse fraction in the zone. However, in the Northern tropical zones, the absorption of DHI in the GHI portion of the solar spectrum lowered due to presence of low...
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  • cloudiness 云量
  • tropical 热带的
  • diffuse 普及
  • irradiation 照射
  • horizontal 水平线
  • conditions 条件式
  • solar 太阳
  • influence 影响
  • vapour 蒸汽
  • portion 部分