### Performance of a Solar Still Integrated in a Greenhouse Roof

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#### Abstract

We are interested to the natural convection flow resulting from the combined buoyancy effects of thermal and mass diffusion in an inclined cavity. The first part of the study was set up to predict the fresh water production by resolving a set of energy balance equation including the top glass cover, the brackish water and the absorber layer. The influence of parameters such as inlet water temperature, water flow rate and climate conditions was investigated. The second part deals with the problem in a Cartesian coordinate system involves the use of a control-volume based finite element method (CVFEM) and solves the full vorticity transport equation together with the stream function, concentration and energy equations. The predicted stream function patterns, isoconcentration and isotherms are presented for different Rayleigh numbers. The results were compared with the available data and the agreement is satisfactory *Copyright © 2013 Praise Worthy Prize - All rights reserved.*

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