1. Lecture 12

2. Review of Systems In bin Batch In bin Deep Batch In bin Continous
Shallow layers 3.5ft deep
In bin Deep Batch
Less efficient-losses while stirring
In bin Continous
Hot grain moved away for storage
Only 1400 Btu/# water needed
Portable Batch
First pass dryer

3. Dryeration Remove hot grain at 1.5 % above safe storage
Residual heat will remove the 1.5%
Air is pushed through the bin
Problem with power vents so after ½ full, air is pulled through the top of the bin
No condensation on roof of bin

4. Cooleration
Dry Grain to 18% moisture
Use cfm fan

5. Fan Types for In Bin Drying
Axil-low pressure
Excessive static pressure
If Additional fans are needed
Must be identical
In Size (Hp)
Mounted in Tandem
To double air flow- 4x’s more Hp needed

6. Fan Types for In Bin Drying
Centrifugal
Tip speed of fan determines capacity

7. Selecting the right fan
Size of bin
Amount of grain
Type of drying system
Moisture content of grain