A third example is the simulation of an existing industrial two-stage spray dryer (see Fig. 6) for which it was planned to increase the capacity by 20% by increasing the air-flow and by modifying the existing fluid bed .The simulations using DrySim showed that the air temperature also need to be increasd in order to achieve the required capacity increase .This would also result in an energy reduction of 2% per mass volume powder .The disadvantage of these changes would be a slight increase in the insolubility index of the powder .New Simulations showed that replacing central atomisation (nozzles positioned under the centre of the air inlet channel by lateral atomisation(nozzles positioned at the periphery ofthe air inlet and directed to the centre ) would under similar process conditions lead to a lower thermal load of the product . After modifing the nozzle geometry ,the predicted effect proved to be correct.