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Greenhouse systems with integrated water desalination for arid areas based on solar energy

Chaibi, M.Thameur (2003). Greenhouse systems with integrated water desalination for arid areas based on solar energy. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae. Agraria, 1401-6249 ; 389
ISBN 91-576-6438-2
[Doctoral thesis]

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Abstract

The limited water resources in arid areas have led to the use of low-quality irrigation water in agriculture which may reduce crop yields and damage the environment. This study is focused on a greenhouse concept with integrated water desalination considered for small scale applications at remote locations in areas where only saline water is available. In this greenhouse the roof light transmission is reduced as solar radiation is absorbed by a layer of flowing water on a glass covered by a top glass. Fresh water is evaporated, condensed on the top glass and collected at the roof eaves. The main objective of this research work is to analyze the fresh water production as well as the crop growth capacity and water demand for the concept. Included are theoretical and experimental studies with a focus on the total system performance and design. The work also includes perspectives on the potential for more advanced cover materials and system concepts of particular interest for further development into future applications. For the theoretical analysis simulation models with high accuracy have been developed for the water desalination, the light transmission into the greenhouse, the greenhouse climate and for the crop growth and water demand. The assessment of this concept compared to conventional, single glass greenhouses includes extensive simulations and field experiments in Tunisia. Considerably less extreme climate conditions were registered in an experimental greenhouse with roof desalination compared to a conventional greenhouse. A system integrated in 50% of the roof area has the capacity to cover the annual demand for a low canopy crop. A similar capacity for a high canopy crop requires asymmetric roof design and desalination system in the whole roof area. Simulated yield reductions for these cases are 25 and 18 % and seasonal fresh water storage is required. Lower yield reductions could be achieved with application of more light selective glass materials in the roof absorber. Here, interesting future prospects are identified for advanced glass materials with dynamic absorptance control. Economic analyses including water costs and grower revenues indicate that this greenhouse concept competes well with solar collector based technologies for water desalination.

Authors/Creators:Chaibi, M.Thameur
Title:Greenhouse systems with integrated water desalination for arid areas based on solar energy
Year of publishing :April 2003
Volume:389
Number of Pages:50
Papers/manuscripts:
NumberReferences
ALLI. Chaibi, M.T. 2000. An overview of solar desalination for domestic and agriculture water needs in remote areas. Desalination 127, 119-133. II. Chaibi, M.T. 2000. Analysis by simulation of a solar still integrated in a greenhouse roof. Desalination 128, 123-138. III. Chaibi, M.T. 2002. Validation of a simulation model for water desalination in a greenhouse roof through laboratory experiments and conceptual parameter discussions. Desalination 142, 65-78. IV. Chaibi, M.T. Optical performance and crop growth capacity for solar desalination systems integrated in greenhouse roofs – experiments and theories. (In review, Biosystems Engineering). V. Chaibi, M.T. and Jilar, T. System design, operation and performance of roof-integrated desalination in greenhouses. (In review, Solar Energy). VI. Chaibi, M.T. and Jilar,T. Economy prospects for roof integrated water desalination in greenhouses. (Accepted for presentation at the International Solar Energy Society Conference in Gothenburg, Sweden, June 2003)
Place of Publication:Alnarp
ISBN for printed version:91-576-6438-2
ISSN:1401-6249
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F06 Irrigation
P Natural resources > P40 Meteorology and climatology
P Natural resources > P10 Water resources and management
Subjects:Not in use, please see Agris categories
Agrovoc terms:greenhouses, water balance, irrigation water, growth, crop yield, saline water, solar radiation, freshwater, economic analysis, tunisia
Keywords:solar desalination, greenhouse irrigation, water balance, light transmission, crop growth, economy
URN:NBN:urn:nbn:se:slu:epsilon-38
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-38
ID Code:263
Department:(LTJ, LTV) > Institutionen för jordbrukets biosystem och teknologi
Deposited By: M.Thameur Chaibi
Deposited On:29 Apr 2003 00:00
Metadata Last Modified:02 Dec 2014 10:03

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