Community Research and Development Information Service - CORDIS

Abstract

Publishable final report of project JOE3-CT97-0086

A CFD code for the prediction of the flow in a spray dryer has been developed as a design tool for optimisation of spray drying plant efficiency. The advanced research CFD code, that takes into account buoyancy effects due to evaporation and product specific drying characteristics was developed by the National Technical University of Athens within the scope of this project supported by contributions of Bayer and Niro. It incorporates a collision / coalescence developed by Cranfield University and an evaporation model.

The experiments carried out by Imperial College include a study of the effect of airflow bulk velocity, temperature and turbulence levels on the evaporation rate of droplets, a study of the development of co-axially constrained turbulent jets. Imperial College also carried out simultaneous size and velocity measurements of partially dried particles of arbitrary shape by shadow Doppler velocimetry in both laboratory and industrial scale dryers.

Finally a parametric study was carried out on several designs by the National Technical University of Athens, Bayer and Niro to establish new designs of spray dryer geometry with higher energy efficiency while maintaining product quality. All the results of the project became a part of the new computer based design methodology for spray dryers with increased thermal efficiency, which was developed throughout the project.

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Record Number: 1781 / Last updated on: 2002-02-22
Category: PROJ