Arid
DOI10.1007/s10765-018-2434-8
Effect of Aging on the Spectral Radiative Properties of Plastic Film-Covered Greenhouse under Arid Conditions
Abdel-Ghany, A. M.1; Al-Helal, I. M.1; Kumar, Anil2; Alsadon, A. A.3; Shady, M. R.1; Ibrahim, A. A.3
通讯作者Abdel-Ghany, A. M.
来源期刊INTERNATIONAL JOURNAL OF THERMOPHYSICS
ISSN0195-928X
EISSN1572-9567
出版年2018
卷号39期号:10
英文摘要

Plastic films are widely used to cover greenhouses in arid regions. Unlike predicting the total radiative properties of films, predicting the deterioration behavior of the spectral radiative properties is quite difficult during the service life of the films. These properties should be of great interest for crop morphogenesis studies. This study was to investigate the degradation behavior of spectral transmittance, , and reflectance, (in the solar spectrum range), of a 200 A mu m thick, LDPE film-covered greenhouse model that was exposed for 1 year to an arid climate. Every 30 days, and were measured for six samples taken from the six surfaces of the greenhouse cover and averaged to obtain the cover properties. Based on the collected data, nonlinear correlations (each as a function of the wavelength, lambda, and the exposure time, t) were obtained to predict and at any time during the service life of the cover under such climatic conditions. Results showed that 1 year exposure drastically reduced the spectral and total transmittance of the cover film to global and PAR solar radiation by about 32 % and increased the spectral and total reflectance by about 19 % compared to new film. Degradation of the radiative properties of the film did not affect the light quality or the transmission ratios of light into the greenhouse. The transmitted PAR was reduced from 115 W center dot m(-2) to 27 W center dot m(-2) after 1 year exposure.


英文关键词Arid Climate Covers Greenhouse Properties Radiation
类型Article
语种英语
国家Saudi Arabia ; India
收录类别SCI-E
WOS记录号WOS:000442480900002
WOS关键词DENSITY POLYETHYLENE FILMS ; TRANSMITTANCE ; PERFORMANCE ; DEGRADATION ; DUST
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/2XILL650/210292
作者单位1.King Saud Univ, Dept Agr Engn, Coll Food & Agr Sci, POB 2460, Riyadh 11451, Saudi Arabia;
2.Maulana Azad Natl Inst Technol, Dept Energy, Energy Ctr, Bhopal 462003, MP, India;
3.King Saud Univ, Dept Plant Prod, Coll Food & Agr Sci, POB 2460, Riyadh 11451, Saudi Arabia
推荐引用方式
GB/T 7714
Abdel-Ghany, A. M.,Al-Helal, I. M.,Kumar, Anil,et al. Effect of Aging on the Spectral Radiative Properties of Plastic Film-Covered Greenhouse under Arid Conditions[J]. King Saud University,2018,39(10).
APA Abdel-Ghany, A. M.,Al-Helal, I. M.,Kumar, Anil,Alsadon, A. A.,Shady, M. R.,&Ibrahim, A. A..(2018).Effect of Aging on the Spectral Radiative Properties of Plastic Film-Covered Greenhouse under Arid Conditions.INTERNATIONAL JOURNAL OF THERMOPHYSICS,39(10).
MLA Abdel-Ghany, A. M.,et al."Effect of Aging on the Spectral Radiative Properties of Plastic Film-Covered Greenhouse under Arid Conditions".INTERNATIONAL JOURNAL OF THERMOPHYSICS 39.10(2018).
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