Cippatura comparativa di porzioni basali e cimali di pioppo.
Civitarese, V.; Fanigliulo, R.; Pochi, D.; Spinelli, R.; Pari, L.
|Kind of publication:|
Compagnia delle Foreste
|Abstract in Italian:|
In questo studio sono state valutate le performance e i principali parametri funzionali di una
cippatrice a tamburo Pezzolato.
|Abstract in English:|
A commercial drum chipper was fed alternately and piecewise
with poplar stems and poplar tops, in order to determine the
effect of piece size and tree part on machine performance.
Chipping stems required most of the available power (231
kW) delivered by the tractor, whereas chipping tops took
about half that much. However, productivity was twice as
high with stems, compared to tops (i.e. 25 and 11 t h-1 of
oven dry wood, respectively). As a consequence, specific
fuel consumption per unit product was 15% lower with stems,
compared to tops. Productivity and fuel consumption were
strongly related to piece size, but tree part had its own additional
effect, independent from size and possibly related to
form. When chipping tops it is advisable to feed more pieces
at a time, in order to partly compensate for the effect of piece
size. Operators expecting to chip primarily small-size materials
may acquire special chipper versions with wider drums and
additional side rollers, for smoother mass feeding.