干旱区生态环境知识资源中心(Arid): Estimation of Sky Thermal Irradiance in Arid Climate under Clear Sky Conditions

Arid

DOI	10.1007/s10765-020-02656-1
	Estimation of Sky Thermal Irradiance in Arid Climate under Clear Sky Conditions
	Ahmed, H. A.1,2,4; Yu-xin, T.1,2; Qi-chang, Y.1,2; Al-Helal, I. M.3; Shady, M. R.3; Abdel-Ghany, A. M.3
通讯作者	Abdel-Ghany, A. M.
来源期刊	INTERNATIONAL JOURNAL OF THERMOPHYSICS
ISSN	0195-928X
EISSN	1572-9567
出版年	2020
卷号	41 期号:6
英文摘要	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.
英文关键词	Arid climate Air temperature Sky emissivity Thermal radiation Water vapor pressure
类型	Article
语种	英语
国家	Peoples R China ; Saudi Arabia ; Yemen
收录类别	SCI-E
WOS记录号	WOS:000524564200001
WOS关键词	DOWNWARD LONGWAVE RADIATION ; CLOUDY SKIES ; MODEL ; FLUX
WOS类目	Thermodynamics ; Chemistry, Physical ; Mechanics ; Physics, Applied
WOS研究方向	Thermodynamics ; Chemistry ; Mechanics ; Physics
来源机构	King Saud University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314800
作者单位	1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China; 2.Minist Agr, Key Lab Energy Saving & Waste Disposal Protected, Beijing 100081, Peoples R China; 3.King Saud Univ, Coll Food & Agr Sci, Dept Agr Engn, POB 2460, Riyadh 11451, Saudi Arabia; 4.Sanaa Univ, Fac Agr, Dept Agr Engn, Sanaa, Yemen
推荐引用方式 GB/T 7714	Ahmed, H. A.,Yu-xin, T.,Qi-chang, Y.,et al. Estimation of Sky Thermal Irradiance in Arid Climate under Clear Sky Conditions[J]. King Saud University,2020,41(6).
APA	Ahmed, H. A.,Yu-xin, T.,Qi-chang, Y.,Al-Helal, I. M.,Shady, M. R.,&Abdel-Ghany, A. M..(2020).Estimation of Sky Thermal Irradiance in Arid Climate under Clear Sky Conditions.INTERNATIONAL JOURNAL OF THERMOPHYSICS,41(6).
MLA	Ahmed, H. A.,et al."Estimation of Sky Thermal Irradiance in Arid Climate under Clear Sky Conditions".INTERNATIONAL JOURNAL OF THERMOPHYSICS 41.6(2020).