Automated, efficient distribution of dry air between cells for optimal drying results.
Installations & Products
Hybrid air drying in cells
Dried air, at the right place and the right time
With a central hybrid air dryer, the seed can be dried optimally and in a fully controlled manner in a closed cell. The right amount of dried air can be blown in per individual cell or room. The desired moisture content in the cell is thus achieved. The desired moisture content is adjustable per cell and can (if desired) be reduced in 5 separate phases during the drying process.
The air dryer can draw in outside air or recirculate air from the cell (return air). When the Absolute moisture content (AH, g water per kg air) of the air in the cell is higher than the outside air, the dryer draws in air from outside. The moist air in the cell is discharged outside.
When the air in the cell is drier than the outside air, the air dryer draws in this drier air and dries this air further.
The ABC control controls the air dryer and the valve sections for the drying process. Dried air is continuously blown into the cell with the most moisture (provided that the desired moisture content has not yet been reached there). A cell can also be appointed for priority drying.
By blowing enough dried air into a cell, the moist air in the cell is refreshed within a few minutes. The dried air is drawn in by the air distribution system and blown through the boxes.
This dry air quickly absorbs a lot of extra moisture. Due to the continuous supply of dried air, the AH of the air coming from the seed (with plant) and the air in the cell will decrease rapidly. Less dried air is then needed to absorb the moisture in this cell and gradually more air is blown to the next moist cell.
In this way, each cell is dried to the desired moisture content (of the drying phase) and the hybrid air dryer is used optimally.
Volume boxes for seed with crop
1
Dried air is blown into the cell
2
Fans of the air distribution system
3
Valve register for discharge moist air
4
Valve register return moist air to air dryer
Dried air is blown into the cell (1). Fans of the air distribution system (2) draw in this dried air and then blow it through the product.
At the start of the drying process, a lot of moisture is released. This moist air is discharged outside at (3). When the product starts to give off less moisture, the air in the cell becomes drier than outside. The air exhaust to the outside (3) is closed. The air is now drawn back to the air dryer via (4). The air is dried again
and presented to the cell again.
This drying process is carried out fully automatically by the ABC processor. The desired moisture content can be set per cell. Dried air is blown into each cell until the desired moisture content of the air is reached.
‘Half sized’ boxes to dry smaller amount of seed
1
Valve register for inlet dried air
2
Fans of the air distribution system
3
Valve register for discharge moist air
4
Valve register for return moist air to air dryer
ABC software measures the air and directs dried air where most needed
In each cell, the air conditions are precisely measured. Based on the absolute moisture content of the air, the seeds are dried in stages to the desired moisture content.
In the initial stages of drying, seeds lose moisture more easily than in the later stages. This is taken into account during the drying process, and dried air is automatically added to the cell or cells where it will have the most added value.
ABC overview hybrid air dryer
1
Adsorption Rotor
2
Pre-Cooling for Pre-Drying
3
Heating for Regeneration Air
4
Cooling Regeneration Air
5
Warming up Process Air
6
Warm Water for Drying Seed
7
External Condensor
8
Status of WAgratech Air Dryer
Summary
Hybrid air drying in cells for efficient and controlled seed drying
With hybrid air drying in cells, seeds can be dried under highly controlled and energy‑efficient conditions. A central hybrid air dryer produces dehumidified air and automatically distributes it between the different drying cells. The dry air is directed to the cell with the highest humidity level, ensuring optimal use of drying capacity.
During the drying process, the air dryer can use both fresh outside air and recirculated air from the cells. When the air inside the cell is more humid than the outside air, fresh air is drawn in and the moist air is exhausted. When the air in the cell becomes drier than the outside air, it is recirculated and further dehumidified. This creates a highly efficient and energy‑saving drying process.
The ABC software continuously measures the air conditions in each cell and automatically controls the airflow distribution. Based on the absolute humidity of the air, dry air is supplied to the cells where it has the greatest impact. The desired moisture level can be set individually per cell and the drying process can be controlled in multiple phases.
This intelligent air distribution ensures that each cell is dried evenly and precisely, while making optimal use of the drying system’s capacity. Hybrid air drying therefore offers a reliable and flexible solution for controlled seed drying in drying cells.
Dried air
Optimal drying
The air adapts during the drying process. The Agratechniek Drying Method uses three phases to achieve optimal drying and save energy.
Hybrid air drying in cells are highly suited for drying of Seeds, Vegetable & Fruit seeds
Example installations
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