<6>
<3>
Original fresh air
1 wt.% moisture
Hot air
2 wt.% moisture
<4>
<1>
Wet wood
20 wt.% moisture
<5>
Drier
<2>
Dry wood
5 wt.% moisture
Wet air
4 wt.% moisture
<7>
<1>
Wet wood
20 wt.% moisture
Overall System
<3>
Original fresh air
1 wt.% moisture
Wet air
4 wt.% moisture
<7>
<2>
Nsp = 3; NS = 4
NU = 4(3+1) – (4+3+3+3) = 3
NE = 1 + 2 = 3
ND = 3 – 3 = 0
Dry wood
5 wt.% moisture
Hot air
2 wt.% moisture
<4>
<1>
Wet wood
20 wt.% moisture
Drier
Wet air
4 wt.% moisture
<5>
<2>
Dry wood
5 wt.% moisture
Nsp = 3; NS = 4
NU = 4(3+1) – (4+3+3+3) = 3
NE = 1 + 2 = 3
ND = 3 – 3 = 0