Storage systems general
Published on: Wed. 18 November 2009 at 13:49
Storage systems general
Storage systems can be divided in 2 main
categories:
- Bulk-storage: Agricultural products stored in
Bulk. To maintain the quality of the products during the
storage-period, it’s important to control the product’s
temperature, relative humidity and/or CO2-level. This is done by
ventilating conditioned (outside) air through and through the
stored products.
- Box-storage: Agricultural products stored in
palletboxes or bags. This situation is called “room-ventilation”.
This is ventilation alongside the packed products, in order to
control the storage conditions.
Characteristics of Bulk-storage:
Because of optimal direct contact between stored product and
ventilation-air,
- there will be a very effective drying and cooling. A fast
process of drying and cooling will reduce diseases.
- And there will be a better temperature-control too, which is
important to conserve product quality for a long-time
storage-period.
- Another advantage of bulk storage will be the equalized
temperature and humidity through the whole batch. This will result
in less condensation-spots and will reduce diseases and
degeneration of the stored products.
- The optimal distribution of ventilated air through the product,
enables the application of anti-sprouting chemicals (for potatoes).
So, this will reduce the quantity of chemicals required.
Standard equipment for bulk-storage:
Fans, Insulated Inlet & Outlet Hatches, Hatch Automation,
Air-distribution system (chamber and tunnels), Temperature-control
and Switchboard, Cooling-machines. Humidification-machines are
optional, depending on the stored product and the local
climate;
Characteristics of Storage in boxes & bags:
Because of less direct contact between the stored product and the
ventilation-air,
- the producttemperature control will be more difficult in the
situation of roomventilation.
- But, at the same time, storage-diseases will not easily
spread out through the whole storage.
- Storage in Boxes and Bags makes it possible to store
different types and species and gradings in one
storage.
- In most cases you don’t need heavy walls for the
storage-building. Although you will have to invest in the boxes.
Boxes and bags can be handled by forklift.
- And it will be possible to load and unload the storage in small
batches.
Standard equipment for roomventilation
- Alt 1: Fans built in simple ventilation
chambers (wall or ceiling), outside and inside ventilation-air
(Inlet & Outlet Hatches), temperature-control, sensors and
switchboard. Electrical installation. Humidifiers are
optional.
- Alt 2: Turnkey Cooling machines
(Air-inlethatch and fans and cooling are mounted together),
outlet hatches, electronic temperature control, sensors
and switchboard. Electrical installation. Humidifiers are
optional.
- Alt 3: Heavy duty Pressure Chambers with
built-in fans for through and through ventilation of
palletboxes. In this particular situation the palletboxes
need very orderly be stacked in a row. In fact, this is
not roomventilation. Air inlet and outlet hatches,
temp.control, sensors and switchboard and electrical installation
are needed as well.
- Alt 4: Potato Decondensation Units. Fans
in airmix chamber and inlet+ outlet hatches,
control-unit, sensors and switchboard.