To give some indications about the best pellet blends charac-
teristics, the relationship between bulk density, durability and en-
ergetic density is reported in Fig. 7 and Fig. 8 for the two series of
pellet blends. The energetic density is an important factor to
consider, mostly in relation to the sizing of the storage place of the
pellets. This parameter is the ratio between the heating value and
the bulk density of the pellet.
In the figures is represented only a black dashed line corre-
sponding to the durability minimum threshold (96%) according to
EN 17225-6 [17] because the requirements of the bulk density are
observed for all the blends.
For 2 PH pellet blends (Fig. 7) only 75PR252 PH sample presents