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Enhancement of freshwater production of the seawater greenhouse condenser

Journal of Arid Land 2021年第4期13卷 397-412页

作者： Tahani K BAIT SUWAILAM Abdulrahim M AL-ISMAILI Nasser A AL-AZRI L H Janitha JEEWANTHA Hemesiri KOTAGAMA Department of Soils Water and Agricultural EngineeringSultan Qaboos UniversityAl-Khoud 123Oman Department of Mechanical and Industrial Engineering Sultan Qaboos UniversityAl-Khoud 123Oman Department of Natural Resource Economics Sultan Qaboos UniversityAl-Khoud 123Oman

seawater greenhouse(SWGH)is a technology established to overcome issues related to open field cultivation in arid areas,such as the high ambient temperature and the shortage of *** adopts the humidification-dehumidification concept where evaporated moisture from a saline water source is condensed to produce freshwater within the greenhouse *** condenser designs are adopted to increase freshwater production in order to meet the irrigation *** aim of this study was to experimentally investigate the practicality of using the packed-type direct contact condenser in the SWGH to produce more freshwater at low costs,simple design and high efficiency,and to explore the impact of the manipulating six operational variables(inlet air temperature of the humidifier,air mass flowrate of the humidifier,inlet water temperature of the humidifier,water mass flowrate of the humidifier,inlet water temperature of the dehumidifier and water mass flowrate of the dehumidifier)on freshwater condensation *** this purpose,a direct contact condenser was designed and ***-four full factorial experiments were conducted to study the effect of the six operational *** variable was operated at two levels(high and low flowrate),and each experiment lasted for 10 min and followed by a 30-min waiting *** showed that freshwater production varied between 0.257 and 2.590 L for every 10 *** using Minitab statistical software to investigate the significant variables that contributed to the maximum freshwater production,it was found that the inlet air temperature of the humidifier had the greatest influence,followed by the inlet water temperature of the humidifier;the former had a negative impact while the latter had a positive impact on freshwater *** response optimizer tool revealed that the optimal combination of variables contributed to maximize freshwater production when all variables were in the high mode and the inlet air

关键词： seawater greenhouse humidification-dehumidification direct contact condenser freshwater production water desalination

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