• a simple model for the derivation of illuminance values from global solar radiation data

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 846
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     this paper presents a new simple luminous efficacy model for global horizontal irradiance. the objective is to derive values of outdoor global horizontal illuminance data from typical local weather station data including global horizontal irradiance and humidity ratio of outdoor air. the proposed luminous efficacy model incorporates, as the main influencing variable, the clearness factor, which is an original derivative from the clearness index. two further variables are included in the model formulation. these are the humidity ratio and the solar altitude. moreover, the model includes a location-dependent variable, which may be derived from the latitude information. the paper includes the result of the statistical analysis of the relationship between the model predictions and the measured data. the results of this analysis display a good agreement between predictions and measurements.

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