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Optimizing Your Grain Harvesting System . Sam G. McNeill Extension Agricultural Engineer UKREC Princeton, KY 270-365-7541 x 213 [email protected] Biosystems and Agricultural Engineering. Information for Combine(s). Harvesting rate (bu/h) Capacity of grain tank (bu)

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optimizing your grain harvesting system

Optimizing Your Grain Harvesting System

Sam G. McNeill

Extension Agricultural Engineer

UKREC Princeton, KY

270-365-7541 x 213

[email protected]

Biosystems and Agricultural Engineering

information for combine s
Information for Combine(s)
  • Harvesting rate (bu/h)
  • Capacity of grain tank (bu)
  • Unloading rate (bu/min)
  • Stationary/mobile unloading?
  • Up to 10 combines
data for hauling vehicle s
Data for Hauling Vehicle(s)
  • Type of vehicle
    • Cart, wagon, truck, trailer
  • Hauling capacity (bu)
  • Unloading rate (bu/min)
  • Travel time from field to bins
  • Up to 20 trucks
on farm handling equipment
On-Farm Handling Equipment
  • Receiving pit/hopper (bu)
  • Wet grain auger/leg (bu/h)
  • Wet holding bin (bu)
  • Dry grain conveyor/leg (bu/h)
  • Surge bin (between dryer and leg/conveyor) (bu)
dryer types
Dryer Types
  • Storage only (no drying)
  • Bin Dryers (bu/d)
    • Layer
    • Batch/continuous -in-bin
  • High speed dryers (bu/h)
    • Automatic Batch
    • Continuous Flow
layer batch bin dryers
Layer & Batch/Bin Dryers
  • Drying capacity (bu/day)
    • Size of bin/fan
    • Depth of grain
    • Drying air temp. / r.h.
    • Initial/final corn moisture
  • Unloading rate (b/h)
automatic batch dryers
Automatic Batch Dryers
  • Drying capacity (bu/h)
    • Drying air temp. / r.h.
    • Amount of air (cfm/bu)
    • Initial/final corn moisture
  • Holding capacity (bu)
  • Load/unload time (min)
continuous flow dryers
Continuous Flow Dryers
  • Drying capacity (bu/h)
    • Drying air temp. / r.h.
    • Amount of air (cfm/bu)
    • Initial/final corn moisture
  • Holding capacity (bu)
sizing dryers
Sizing Dryers
  • operate 20 hours/day for your harvest moisture
  • (20%+) allows for wet seasons /harvest pressure
  • Expl: for a harvest rate of 12,000 bu/day, select a 600 b/h dryer at 7-10 points of moisture removal
sizing wet holding bins
Sizing Wet Holding Bins
  • Wet tanks should be large enough to hold ~ 1.5 x EOD capacity, for example…
    • Combine cap. = 12,000 bu/day
    • Dryer capacity = 8,000 bu in 20 h
    • Difference is 4000 bu/day
    • Wet tank should be 5000 bu
sizing surge bins
Sizing Surge Bins
  • Base size on time to collect amount of dry grain x 1.2
    • Expl: for a 300 b/h dryer that will be serviced by a 1500 b/h leg used to unload a 600 bu truck…the leg will need 24 min. to unload the truck
    • Surge bin should be 145 bu(0.4 h * 300 b/h * 1.2)
conclusion
Conclusion
  • Use available computer programs to evaluate system performance
  • Good system design will be limited by the combine
  • Plan for future expansion so that equipment replacement / upgrades are cost effective
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