Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.3390/en12244716 |
| Predicting the Cooling Potential of Different Shading Methods for Greenhouses in Arid Regions | |
| Abdel-Ghany, Ahmed1,2; Al-Helal, Ibrahim1; Alkoaik, Fahad1; Alsadon, Abdullah3; Shady, Mohamed1; Ibrahim, Abdullah3 | |
| 通讯作者 | Abdel-Ghany, Ahmed |
| 来源期刊 | ENERGIES
 |
| EISSN | 1996-1073 |
| 出版年 | 2019 |
| 卷号 | 12期号:24 |
| 英文摘要 | Shading greenhouses in a hot and sunny climate is essential to reduce the inside greenhouse air temperature. However, the type and location of nets need to be addressed properly to determine the shading method that provides a better cooling effect on the greenhouse air. This study was conducted to evaluate the effects of five different shading methods on greenhouse microclimates, and to investigate the cooling potential of each method. Four greenhouse models covered with 200-mu m thick plastic film were used for the study: one was kept as control (C), one was whitened with slaked lime (L), and two were shaded with white and black nets (50% shading factor) deployed simultaneously at two locations, in contact (WC, BC) and at 20-cm distance from the cladding film (WD, BD). The microclimatic parameters were measured inside and outside the greenhouse models, and the cooling potential (CP) was predicted for each shading method. The results showed that the black net at 20-cm distance (BD) is desirable as it provides high CP with a reasonable solar radiation transmission. The maximum CP was estimated as 8.5 degrees C, 8 degrees C, 6 degrees C, 3.2 degrees C, and 2.1 degrees C for L, BD, BC, WD, and WC, respectively. Shading with white nets is not recommended because their cooling potential is very low. Based on these results, we developed correlations for predicting the CP for each shading method as a function of the transmitted solar radiation flux (S-i). These correlations depend on S-i. Accordingly, they can be used for small greenhouses, whitewashed with a slaked lime of any concentration, or shaded with a black net having any shading factor. |
| 英文关键词 | shading nets solar radiation heating cooling greenhouse hot regions |
| 类型 | Article |
| 语种 | 英语 |
| 国家 | Saudi Arabia ; Egypt |
| 开放获取类型 | gold |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000506918400109 |
| WOS关键词 | ENERGY ; CROP ; MICROCLIMATE ; SOLAR ; IMPACT ; WATER ; FILM |
| WOS类目 | Energy & Fuels |
| WOS研究方向 | Energy & Fuels |
| EI主题词 | 2019-12-02 |
| 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/2XILL650/311486 |
| 作者单位 | 1.King Saud Univ, Dept Agr Engn, Coll Food & Agr Sci, POB 2460, Riyadh 11451, Saudi Arabia; 2.Aswan Univ, Fac Energy Engn, Dept Mech Engn, Aswan 81528, Egypt; 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, Ahmed,Al-Helal, Ibrahim,Alkoaik, Fahad,et al. Predicting the Cooling Potential of Different Shading Methods for Greenhouses in Arid Regions[J]. King Saud University,2019,12(24). |
| APA | Abdel-Ghany, Ahmed,Al-Helal, Ibrahim,Alkoaik, Fahad,Alsadon, Abdullah,Shady, Mohamed,&Ibrahim, Abdullah.(2019).Predicting the Cooling Potential of Different Shading Methods for Greenhouses in Arid Regions.ENERGIES,12(24). |
| MLA | Abdel-Ghany, Ahmed,et al."Predicting the Cooling Potential of Different Shading Methods for Greenhouses in Arid Regions".ENERGIES 12.24(2019). |
| 条目包含的文件 | 条目无相关文件。 | |||||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
