Modelling and Simulation of Transport Phenomena in Open-Channel Spiral Wound Modules for Seawater Desalination
This work is mandatory for scientists working in the field of membrane module development. A world-wide steadily increasing drinking water demand emphasises the need of opening-up new sources. In the field of seawater desalination reverse osmosis superseded thermal processes as state of the art at the end of last century, whereas the spiral wound module is employed as the standard element in large-scale applications. In this dissertation transport phenomena of an open channel spiral wound module are characterised experimentally and modelled mathematically. Based on a dimensionless formulation of governing mechanisms, a simulation program is developed to predict the separation behaviour at arbitrary operating conditions and optimise the module design. In a second step hydrodynamics and mass transfer in the feed channel are resolved in detail by means of CFD to assess the spacer integrity. Systematic variation of significant spacer parameters leads to an improved design of the netting.