Table 1 shows the properties of three wood pellet samples. The single
pellet density was calculated from the measured mass and volume
of each wood pellet, averaged over 50 pellets. A 1000 ml glass cylinder
was used to measure the bulk density of wood pellets. The moisture
content was determined by drying the sample at 105 °C for 24 h inside
an oven (ThermoElectron Corporation, U.S.A.;Model: THELCO laboratory
PRECISION). The higher heating value (HHV) was measured by a
bomb calorimeter (Parr Instrument Company, U.S.A.; Model: 6100
Compensated Calorimeter). The volatile matter, fixed carbon, and ash
content were measured by a thermogravimetry analyzer (Shimadzu,
Japan; Model: TGA-50).