In accordance with SMARTFAN goals, ELICA carried out a CFD (Computational Fluid Dynamic) optimization process in order to define the geometric properties of an axial fan (blades number and their shape in particular) to obtain maximum values of the Fluid Dynamic Efficiency (FDE), according to geometric constraints of the technological application.

On the other hand, standard safety tests were performed on plates and on a 3D printed axial fan (designed after the CFD results, shown in fig.2), moulded with different materials.

Safety tests showed that the use of the CNT filled polymer is not allowed for range hoods, but only for air treatment applications. Given the minor progress with a PP V-0 polymer, it might be interesting to test a PP with a better flammability (5VA) index of the matrix, keeping in mind that usually 5VA polymers are unsuitable for impeller moulding.

During next phase, both electrical resistance tests and fluid dynamic performance tests will be carried out on the axial fan. In particular, the impeller will be installed in a standard application to verify materials and life test.