Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/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
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ISSN | 0195-928X |
EISSN | 1572-9567 |
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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