Factors Determining the Selection of Dryers
In calculating dryer requirements, two separate factors must be considered:
1. The required air flow volume for drying at the necessary rate.
2. The heat capacity required for drying at the necessary rate, measured in BTU per hour.
The fan requirements are computed by computing the total air flow needed at the static pressure of the grain at drying depth.
Heater requirements are estimated by calculating the amount of water to be removed from the grain per hour.
Water Content per Bushel of Seed at Different Moisture Percentages:
Pounds of Water per Bushel of Seed at Different Moisture Content Percentage:
Seed Moisture Dry Matter/Bushel | Soybeans , Wheat 51.6 lb | Grain Sorghum 48.2 lb | Com 47.3 lb | Oats 27.6lb |
35 | 27.8 | 26 | 25.4 | 14.8 |
30 | 22.1 | 20.6 | 20.2 | 11.8 |
28 | 20.1 | 18.7 | 18.4 | 10.7 |
26 | 18.2 | 16.9 | 16.6 | 9.7 |
24 | 16.4 | 15.2 | 14.9 | 8.7 |
22 | 14.6 | 13.6 | 13.3 | 7.8 |
20 | 12.9 | 12 | 11.8 | 6.9 |
18 | 11.4 | 10.6 | 10.4 | 6 |
16 | 9.8 | 9.2 | 9 | 5.2 |
14 | 8.4 | 7.8 | 7.7 | 4.5 |
12 | 7 | 6.6 | 6.5 | 3.8 |
10 | 5.8 | 5.4 | 5.3 | 3.1 |
8 | 4.5 | 4.9 | 4.1 | 2.3 |
1. Figured at following weights per bushel soybeans, wheat – 60 pounds at 14 percent.
Grain sorghum, shelled corn – 56 pounds at 14 percent
Oats- 32 pounds at 14 percent.
2. To figure pounds of seed required to make a bushel at any one moisture percentage listed. The pounds of water given for that particular moisture content and pounds of dry matter.