Influence of covering materials and shading on the greenhouse cooling in Iraq
Other Title(s)
دراسة تأثير مواد التغطية و التضليل على أداء تبريد البيوت المحمية في العراق
Joint Authors
al-Bayati, Hind Diya Rida
al-Jabburi, Isam Muhammad Ali
Source
al-Nahrain Journal for Engineering Sciences
Issue
Vol. 20, Issue 1 (31 Mar. 2017), pp.262-271, 10 p.
Publisher
Nahrain University College of Engineering
Publication Date
2017-03-31
Country of Publication
Iraq
No. of Pages
10
Main Subjects
Engineering & Technology Sciences (Multidisciplinary)
Abstract EN
Cooling greenhouses is essential to provide a suitable environment for plant growth in arid regions.
However, using conventional cooling methods are facing many challenges.
Filtering out near infra-red radiation (NIR) at the greenhouse cover can significantly reduce the heating load and can solve the overheating problem of the greenhouse air temperature.
Four cases of shadings were examined for their ability to improve the indoor condition of a greenhouse cooled by indirect direct evaporative cooler: (shade 1) a single layer of polyethylene film, (shade 2) a double layer of polyethylene film, (shade 3) a double layer of polyethylene film with a green mesh layer (shade 4) a double layer of polyethylene film with a Utrecht Corrugated Cardboard with 3cm holes distributed for incident sun light.
An experimental study is conducted to determine the performance parameters of indirect direct evaporative cooling of greenhouse in Baghdad (33.3 oN, 44.4oE) for the four types of shadings.
It was found that the percentage reduction in light intensities for shade 1, shade 2 and shade 3 are 15%, 25% and 40% respectively.
It percentage reduction solar intensity due to shades is increases at the beginning and ending of sunny period, while it was minimum at noon.
The percentage reduction in temperature due to indirect direct evaporative cooling for the shade1, shade 2 and shade 3 and shade 4 are 32.4, 36.3, 42.4, and 47 respectively.
The percentage increasing in relative humidity due to indirect direct evaporative cooling for the shade1, shade 2 and shade 3 and shade 4 are 562.5, 729, 871, and 788 respectively.
The percentage increasing in temperature due heating load of greenhouse for the shade1, shade 2 and shade 3 and shade 4 are 41.4, 33.2, 20.5, and 11 respectively.
The percentage decrease in relative humidity due heating load of greenhouse for the shade1, shade 2 and shade 3 and shade 4 are 43.4, 31, 11.8, and 7 respectively
American Psychological Association (APA)
al-Jabburi, Isam Muhammad Ali& al-Bayati, Hind Diya Rida. 2017. Influence of covering materials and shading on the greenhouse cooling in Iraq. al-Nahrain Journal for Engineering Sciences،Vol. 20, no. 1, pp.262-271.
https://search.emarefa.net/detail/BIM-849104
Modern Language Association (MLA)
al-Jabburi, Isam Muhammad Ali& al-Bayati, Hind Diya Rida. Influence of covering materials and shading on the greenhouse cooling in Iraq. al-Nahrain Journal for Engineering Sciences Vol. 20, no. 1 (2017), pp.262-271.
https://search.emarefa.net/detail/BIM-849104
American Medical Association (AMA)
al-Jabburi, Isam Muhammad Ali& al-Bayati, Hind Diya Rida. Influence of covering materials and shading on the greenhouse cooling in Iraq. al-Nahrain Journal for Engineering Sciences. 2017. Vol. 20, no. 1, pp.262-271.
https://search.emarefa.net/detail/BIM-849104
Data Type
Journal Articles
Language
English
Notes
Record ID
BIM-849104