Hurricane Systems for Biomass Drying - Brochure

Hurricane Cyclones: Cyclones have been designed and improved mostly by empirical means. Computerized Flow Dynamics (CFD) can be used for partial cyclone optimization but it is still incomplete for full cyclone optimization. Notably low collection efficiency results from the fact that particle agglomeration for cyclone modelling has been disregarded until present days. This knowledge has helped ACS build very accurate models of efficiency prediction, capable of explaining why sub-micrometer particles are often captured with much higher efficiency than expected. Particles tend to form bigger agglomerates (clusters) which are much easier to collect than the original particles. Agglomeration increases in the presence of wide particle size distributions, long residence times in the cyclone and high inlet particle concentrations. This has been incorporated in ACS numerical simulation tool, combining a sophisticated stochastic algorithm with a classical numerical model to predict cyclone performance: the PACyc (Particle Agglomeration in Cyclones) model.