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the heated wall which modifies the behavior of the cell. Some authors like [25] recommend to
work at a feed flow rate larger than twice the distillated flow rate to avoid the drying
phenomenon and the subsequent salt deposits.
Determination of the Production of a Multi-Stage Solar Distiller
To remedy the drawbacks of the classical solar distiller which limit its yield, some
authors [25] proposed a multi-stage configuration. Each stage is constituted by a distillation
cell analogous to the one previously described and studied. The latent heat released by the
condensation on the wall of a cell is used to evaporate the liquid in the next cell. This
regeneration of energy allows us to increase the production of the process. The present work
is performed in the frame of a research work the objective of which is the optimization of the
behavior of this type of solar distiller and the improvement of its yield. To estimate the
production of pure water of the distiller, the results previously obtained in the case of a single
cell have been used.
Figure 6. Scheme of a multi-stage solar distiller.
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