文献类型： 外文期刊

第一作者： Ahmed, H. A.

作者： Ahmed, H. A.;Yu-xin, T.;Qi-chang, Y.;Ahmed, H. A.;Yu-xin, T.;Qi-chang, Y.;Al-Helal, I. M.;Shady, M. R.;Abdel-Ghany, A. M.;Ahmed, H. A.

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关键词： Arid climate; Air temperature; Sky emissivity; Thermal radiation; Water vapor pressure

期刊名称：INTERNATIONAL JOURNAL OF THERMOPHYSICS （ 影响因子：1.608； 五年影响因子：1.323 ）

ISSN： 0195-928X

年卷期： 2020 年 41 卷 6 期

页码：

收录情况： SCI

摘要： The sky thermal irradiance (R-sky) is an important factor in meteorological, climatic, and energy balance studies. There are several empirical models for predicting R-sky; however, these are based on the meteorological parameters measured in non-arid climatic conditions and an empirical model for predicting R-sky in arid climates is unavailable. Therefore, this study presents two empirical models for predicting the R-sky under clear sky conditions, common in arid regions such as the Arabian Peninsula. One is based on the sky equivalent emissivity (epsilon(sky)-model) and the other on the sky equivalent temperature (T-sky-model). Meteorological parameters (i.e., air temperature, relative humidity, solar radiation, and downward R-sky) were measured over 3 years and used to develop and validate the proposed models. The results showed that the proposed epsilon(sky)- and T-sky-models had the highest predictive accuracy with a coefficient of determination of 0.86 compared with previously published models. In addition, the proposed epsilon(sky)- and T-sky-models resulted in low values of root mean square and mean absolute percentage errors (7.2 and 7.8 W center dot m(-2) and 1, 2 %, respectively); they were able to precisely predict R-sky at any time in a clear arid climate compared with the prohibitive and time-consuming measurements.

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