The Influence of the Hydrodynamic Conditions on the Performance of Membrane Distillation

Gryta, Marek

doi:10.5772/26660

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2012

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“…The most advantageous operating conditions of the MD module were obtained with the membranes arranged in the form of braided capillaries. This membrane arrangement improves the hydrodynamic conditions (the shape of braided membranes acts as a static mixer), and as a consequence, the module yield was enhanced [ 2 , 9 , 10 ]. The efficiency of MD process depends, to a significant degree, on the morphology of used membranes.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Water Desalination by Membrane Distillation Process

Gryta

2012

Membranes

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The membrane distillation process constitutes one of the possibilities for a new method for water desalination. Four kinds of polypropylene membranes with different diameters of capillaries and pores, as well as wall thicknesses were used in studied. The morphology of the membrane used and the operating parameters significantly influenced process efficiency. It was found that the membranes with lower wall thickness and a larger pore size resulted in the higher yields. Increasing both feed flow rate and temperature increases the permeate flux and simultaneously the process efficiency. However, the use of higher flow rates also enhanced heat losses by conduction, which decreases the thermal efficiency. This efficiency also decreases when the salt concentration in the feed was enhanced. The influence of fouling on the process efficiency was considered.

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Section: Introductionmentioning

confidence: 99%