Westeel 10HP, Инструкция по установке и эксплуатации

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W
ESTEEL
- A
XIAL
F
LOW
A
ERATION
F
AN
7. A
PPENDIX
3HP, 5HP, 7HP, 10HP, & 15HP 7.3. G
RAIN
D
RYING
& A
ERATION
T
IPS
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Figure 7.3
7.3. GRAIN DRYING & AERATION TIPS
• WHAT IS THE DIFFERENCE BETWEEN AERATION, NATURAL AIR DRY-
ING, AND GRAIN DRYING WITH A SUPPLEMENTAL HEATER?
Aeration is
used to control and provide uniform temperature for a grain mass. Natural air
drying is generally used for farm bins and is a method of drying grain without
using supplemental heat and is recommended at 1cfm per bushel of grain.
Grain drying refers to adding supplemental heat to lower the moisture content
of a grain mass at a flow rate of greater than 1cfm per bushel of grain. All
three methods will help extend storage life for grain and prevent spoilage.
• HOW MUCH POWER DO I NEED TO DRY GRAIN? When natural air drying
or when grain drying with a supplemental heater you need roughly 1HP for
every 1000BU of grain. When aerating, you need roughly 1HP for every
10,000BU of grain. These are approximations only as the height of grain influ-
ences the required power as well. Consult your local dealer to accurately size
a fan.
• WHEN CAN I BEGIN TO HARVEST? With a complete natural air drying sys-
tem in place, crops can be taken off above normal moisture content (exam-
ple: wheat 18%–20%). Under warm, low, relative humidity conditions you
should see 3/4–1% of drying taking place per day. This allows a 7–10 day
advance on harvest time as well as more harvesting hours per day.
Note: Natural air drying should be used as a management tool and not as a late
harvest emergency drying system. If late harvest conditions are cool and damp
(conditions less than 10
°C (50°F))natural air drying will be slow and adding
supplemental heat is much more effective.