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LONGITUDINAL DISTILLATION UNIT INTEGRATED WITH STEPPED CYLINDRICAL SURFACE SOLAR COLLECTOR FOR FRESH WATER HARVESTING APPLICATION

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Title: LONGITUDINAL DISTILLATION UNIT INTEGRATED WITH STEPPED CYLINDRICAL SURFACE SOLAR COLLECTOR FOR FRESH WATER HARVESTING APPLICATION
Author: Al-Ameri, Kaswar Ali Jamil
Department: School of Engineering
Program: Engineering
Advisor: Mahmud, Shohel
Abstract: Solar desalination is a promising technique for compensating the shortage of clean water on Earth. The current configurations of solar still are characterized by one square meter or maximum two square meters aperture area. This limits the amount of solar energy entering the still. As a result, it limits the productivity of the still. The work in this thesis presents a study on a proposed system which addresses this issue and can be used for multiple usages. The proposed system consists of two parts: a longitudinal distillation unit integrated with a stepped cylindrical surface solar collector. The work includes investigating and developing a theoretical model for the proposed solar collector and the proposed longitudinal distillation unit. In addition, it includes three comparative studies on the distillation unit to figure out its optimum performance conditions. Last part of this work includes investigation study on the effect of integrating porous aluminum foam in the basin of the SSSBSS, and how it affects the SSSBSS performance. The developed theoretical model of the stepped cylindrical surface solar collector was solved using experimental data sets collected in this study for testing the collector outdoor twice on two days. The results show that the collector efficiency is 62.63% and 60.46% for the two test days. Also, they show that ambient temperature affects significantly the collector performance. The developed theoretical model of the distillation unit was solved by using experimental data sets obtained by testing the unit indoor. Results show that the more energy enters the unit the more productivity obtained, and in-depth study is required to put an empirical relation for the convection heat transfer mode inside the distillation partition of the unit. In addition, supplying brackish water by gravity effect flow, insulating the unit, and doubling the wick layer inside the distillation partition are the optimum performance condition of the unit. Testing the effect of integrating porous aluminum foam in the SSSBSS basin shows that it increases the diffusivity of the basin. Accordingly, basin-glass temperature difference decreases. As a result, the productivity of the SSSBSS decreases.
URI: http://hdl.handle.net/10214/16255
Date: 2019-03-30
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