Jason Lorenz Agro Engineering Inc.potatoes.colostate.edu/wp-content/uploads/2018/03/... · Photo...
Transcript of Jason Lorenz Agro Engineering Inc.potatoes.colostate.edu/wp-content/uploads/2018/03/... · Photo...
Jason Lorenz
Agro Engineering Inc.
When and Why Re-Nozzle Visible pattern problem
Loss in yield
Reduced quality
Equipment maintenance Worn or broken orifice, pads, bracket, regulator
Change in water supply conditions Changing aquifer(change in pressure and flow), change
in pumping plant
Improvement in technology, increasing uniformity/efficiency Impacts sprays oscillating nozzles
Visible Problems
The ring affects 3 acres. The yield map showed a 100 cwt/acre reduction. At $9.75/cwt a loss of $2925 in one ring
Equipment Maintenance Worn orifice = overwatering/ uneven depth applied
Worn pads = uneven / reduced overlap
Broken bracket = uneven pattern/ loss of function
Worn pressure regulators = overwatering/ uneven depth applied
Plugging issues
Change in water supply conditions Sprinkler Uniformity
0.20
0.40
0.60
0.80
1.00
1.20
0 200 400 600 800 1000 1200 1400
Distance Along Lateral (ft)
Ca
tch
Ca
n D
ep
th (
in)
CP
ED
Mo
de
l
925 gpm @30 psi 725 gpm @ 18.5 psi
Improvement in technology
0.5
0.55
0.6
0.65
0.7
0.75
0.8
0.85
0.9
0.95
1
0 200 400 600 800 1000 1200 1400
Distance
Dep
th A
pp
lied
Sen Spray Sen Iwob
Spray vs Oscillating
Important Factors System flow and pressure
In season changes
Center pivot characteristics
Overlap
Spacing
Nozzle height
Nozzle type
Pad selection
Pressure regulated?
End of system decisions
Nozzle Height vs Spacing
Nozzle Height vs Spacing
Nozzle Type Spraying Rotating Oscillating
Photo From “Nelson R3000 Brochure” Nelson Irrigation Corp.
Photo From “Nelson O3000 Brochure” Nelson Irrigation Corp
Photos & graph From “Senninger i-Woband Xi-Wob UP3 Brochure” SenningerIrrigation Inc
Photo From “Senninger Super Spray UP3 Brochure” Senninger Irrigation Inc.
Photo From “Nelson D3000 Brochure” Nelson
Irrigation Corp.http://www.nelsonirrigation.com/products/family/pivot-sprinklers/s3030-spinner
Nozzle Type
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0 5 10 15 20 25 30 35
Spray Rotator Occilating
Pad Selection
Pad Selection
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0 5 10 15 20 25 30
Medium Groove Deep Groove
Spray Pad Selection
Photo From “Senninger Super Spray UP3 Brochure” Senninger Irrigation Inc.
Table From “Nelson D3000 Brochure” Nelson Irrigation Corp.
Rotator Pad Selection
Table From “Nelson R3000 Brochure” Nelson Irrigation Corp.
I-Wob Pads
Photos & Tabler From “Senninger i-Wob UP3 Brochure” Senninger Irrigation Inc
Xi-Wob Pads
Photos & Tabler From “Senninger Xi-Wob UP3 Brochure” Senninger Irrigation Inc
Orbiter Pads
Table From Nelson O3000 Brochure” Nelson Irrigation Corp.
Nozzling with Pressure Regulators Flow rate remains constant as long as minimum
pressure requirement is maintained.
Inlet pressure 5 psi higher than nominal pressure.
Pressure Regulator Performance
15
20
25
30
35
40
45
50
700 800 900 1000 1100 1200
Minimum Pivot Pressure 6 5/8" o.d. Pipe
15 PSI 10 PSI 20 psi
Insufficient Pressure
15
17
19
21
23
25
27
29
31
33
35
-300 200 700 1200
Inle
t P
ress
ure
of
Pre
ssu
re R
eg
ula
tor
psi
Distance Along System (ft) 1000 g.p.m. 32 p.s.i.
End of System
End of System
http://www.nelsonirrigation.com/products/family/end-of-pivot-solutions