Title: Performance evaluation of condensation-irrigation solar system under arid climate conditions
Authors: Wafa Chouaib; M. Thameur Chaibi
Forest Sciences Centre 2030, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada; Institut National de Recherche, en Génie Rural Eaux et Forêts, BP 10, Ariana 2080, Tunisia
Human Resources, Science and Technology Department, Pan African University, African Union Commission, Addis Ababa, Ethiopia; Institut National de Recherche, en Génie Rural Eaux et Forêts, BP 10, Ariana 2080, Tunisia
Abstract: Scarcity of water, major critical concern in arid areas, has led to the use of low-quality irrigation water in agriculture in most of arid climate areas. The quality of water used for agriculture has to be reduced to a sustainable level that is also adapted to the environment. This paper presents the performance of a pilot condensation irrigation (CI) solar system in Tunisia under arid climate conditions. The objective of this study was to investigate the potential of this combined solar system for producing fresh water as an alternative source for irrigation in the greenhouse used for tomato growth. The preliminary testing of the CI system performance showed that moisture amounts in the buried pipes remain high for the sunny and cloudy days and dew condensation is processing mainly at night and early morning times. The produced fresh water satisfies about 15% the maximum crop water requirements during the growth period where tomato crops are most sensitive to water deficit. Based on experimental results, recommendations for system improvements design are suggested.
Keywords: subsurface irrigation; system design; solar desalination; evapo-condensation; performance evaluation; solar energy; solar power; arid climates; condensation irrigation; fresh water; greenhouses; tomato growth; water scarcity.
Int. J. of Energy Technology and Policy, 2014 Vol.10, No.2, pp.145 - 160
Date of acceptance: 18 Jun 2014
Available online: 16 Dec 2014