Biomedical Engineering Reference
In-Depth Information
Temperature
Mass yeild
M
o
M
f
Heat load
Q
f
Q
o
FIGURE 4.3
Ideal temperature and mass loss history of a biomass particle undergoing torrefaction.
The heat load or energy required for this stage, Q
d
,isLM
f
M. By taking
into account, the heat utilization efficiency of the dryer section, h
u.d
, the load
may be written as:
LM
f
M
h
ud
Q
d
5
(4.2)
2260 kJ/kg) of water at 100
C.
The moisture fraction of the biomass as-received (M
f
)isM.
where L is the latent heat of vaporization (
B
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