Agriculture Reference
In-Depth Information
Table 5.15
Parameters for determining rotary power requirements of agricultural equipment
with an expected range in average power requirement due to differences in machine design,
machine adjustment, and crop conditions
a
Parameter
C
1
C
2
C
3
Range
Machine Type
kW
kWm
−1
kWht
−1
±%
Baler (small rectangular bales)
2.0
0
1.0
b
35
Baler (large rectangular bales)
4.0
0
1.3
35
Baler large round (variable chamber)
4.0
0
1.1
50
Baler large round (fixed chamber)
2.5
0
1.8
50
Beet harvester
c
0
4.2
0
50
Beet topper
0
73
0
30
Combine(smallgrain)
20.0
0
3.6
d
50
Combine(corn)
35.0
0
1.6
d
30
Cottonpicker
0
9.3
0
20
Cottonstripper
0
1.9
0
20
Feed mixer
0
0
2.3
50
Forage blower
0
0
0.9
20
Flail harvester (direct cut)
10.0
0
1.1
40
Forage harvester (corn silage)
6.0
0
3.3
e
40
Forage harvester (wilted alfalfa)
6.0
0
4.0
e
40
Forage harvester (direct cut)
6.0
0
5.7
e
40
Forage wagon
0
0
0.3
40
Grinder mixer
0
0
4.0
50
Manure spreader
0
0
0.2
50
Mower (cutter bar)
0
1.2
0
25
Mower (disk)
0
5.0
0
30
Mower (flail)
0
10.0
0
40
Mower- conditioner (cutter bar)
0
45
0
30
Mower-conditioner (disk)
0
8.0
0
30
Potato harvester
0
10.7
0
30
Potato windrower
0
5.1
0
30
Rake (side delivery)
0
0.4
0
50
Rake (rotary)
0
2.0
0
50
Tedder
0
1.5
0
50
Tub grinder (straw)
5.0
0
8.4
50
Tub grinder (alfalfa hay)
5.0
0
38
50
Windrower/swather(smallgrain)
0
1.3
0
40
a
Adapted from [
39
]
b
Increaseby20%forstraw
c
Total power requirement must include a draft of 11.6 kN m
−1
(±40 %)forpotatoharvestersand
5.6 kN m
−1
(±40%)forbeetharvesters.Arowspacingof0.86mforpotatoesand0.71mforbeets
is assumed
d
Based upon material-other-than-grain (MOG) throughput for small grains and grain throughput
for com. For a PTO-driven machine, reduce parameter
a
by10kW
e
Throughput is units of drymatter per hour with a 9-mm (0.35 in.) length of cut. At a specific
throughput,a50%reductioninthelengthofcutsettingortheuseofarecutterscreenincreases
power 25 %
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