AGI AKEHO TS-805 Series, Инструкция по установке, эксплуатации и ремонту

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40 CNA-1815 R5
• SHOULD I SHUT MY FAN OFF AT NIGHT OR WHEN IT RAINS? NO! High moisture grain drying (16% - 20%)
requires continuous air flow to prevent the drying front from crusting over and restricting airflow.
• DOES FAN OPERATION AT NIGHT OR IN HIGH HUMIDITY CONDITIONS REVERSE THE DRYING PROCESS? We
tend to think that a fan will force moisture back into a bin in high humidity conditions. However, it is much
more difficult to put moisture back into the grain than it is to take it out. In fact, grain in the bottom of the
bin that may be a little over-dried would benefit from taking on a little moisture. At 19% moisture and 50°F
(10°C), corn that hasn't been dried will remain constant as the 86% relative humidity moisture level in the
air equals the moisture in the grain, refer to
Table 3 on page 39 .
• IF I ADD SUPPLEMENTAL HEAT, CAN I DRY IN HIGH HUMIDITY CONDITIONS? Adding supplemental heat
(when available) to the natural air drying process will reduce relative humidity and increase the rate of
moisture movement. Therefore, a low temperature supplemental heater will increase the drying rate and
reduce the drying time.
• CAN LOW TEMPERATURE SUPPLEMENTAL HEAT CUT MY DRYING TIME WITHOUT INCREASING COSTS? A
rule of thumb relating temperature increase to relative humidity decrease is: a temperature increase of 50°F
(10°C) above outside air temperature will reduce the relative humidity by half.
Example:
50°F (10°C) and 70% relative humidity
+ 50°F (10°C) (increased by supplemental heat)
= 68°F (20°C)and 35% relative humidity
• When low-temperature heat is added in high-humidity conditions, drying times can be reduced up to 8 days.
By reducing operating time, overall costs are less than operating only the fan under these conditions.
With the average harvest period generally 30–40 days, it's comforting to know you can depend on supplemental
heat, not the weather, to get the job done.
Important
Care should be taken when operating a supplemental heater under low humidity conditions. This can
cause severe over-drying at the bottom of the bin.
• HOW DO I KNOW WHEN MY GRAIN IS DRY? Approximate drying chart based on a complete Aeration
System:
Approximate Condition Approximate Drying %
Ideal warm days / dry conditions
1% per day
Warm days & cool nights
1/2% per day
Cool days & cool damp nights 1/4% per day
Cold days & cold nights 0% per day
Warm days & cool nights (supplemental heat
added) 3/4% per day
Important
If you add 1 or 2 loads of grain at 18% moisture into the bin, assume the bin to be at 18% average
moisture — don't reduce the average if some loads are at a lower percentage.
Important
Do not count the first day in the drying process; it takes 14–16 hours for the bin to equalize its
temperature.
7. APPENDIX AERATION FAN – SUPER-FLOW FULL CENTRIFUGAL FAN