CROP-PROTECTOR Chiller - for grain chilling
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Superior chilling Based on Hi-Tec components and iGRAIN sensor and control technology A joint venture between CROP-PROTECTOR® and TMS Industrial Refrigaration

Grain Chilling Theory Why grain chilling? Grain is the foundation of our culture, and grain is at the root of almost all food and feed supply chains. The worldwide total harvest of grains is in excess of 2.200 million tonnes per year. A lot of grain is stored and consumed locally, but an increasing part of the total grain harvest is distributed around the world and undergo long and complex transport routes. The grain may go through several intermittent stages, before it is permanently stored in a silo prior to consumption in a food or feed processing plant. According to FAO (Food and...

Most infestation starts with insect infestation which leads to fungus infestation because of the insect respiration wetting the grain. With the grain Chiller the temperature can be controlled to prevent insect growth, as illustrated. The grain moisture (absolute moisture %) can be controlled by controlling the relative humidity in the air surrounding the grain. This is possible because the grain cell membrane passively regulates the diffusion of moisture through the cell membrane. This is called Equilibrium Moisture Concentration (EMC). Figure A shows different EMCs in % values for wheat,...

The Chilling Process Humidity and grain temperature In the process of chilling the grain, the chilled air flows through the grain in the silo. When cold air is moving up through the silo, the grain is cooled down. This shifts the equilibrium between relative humidity in the cooling air, and the grain moisture inside the grain. The EMC concentration is now shifting, and the grain is subject to diffusion of moisture out of the grain kernels and thereby raising the relative humidity in the flowing air. This moisture is then flowing upwards through the grain. Eventually the air will reach a...

CROP-PROTECTOR Chiller A unique way to preserve your stored crop, avoid infestation and increase profit When crops are chilled to a temperature below 16 degrees Celsius, unwanted biological activity, such as insects, mites and fungus growth is interrupted and insect procreation will cease. Any type of grain, seed, oilseed, bean, nut, meal etc. can be chilled by the CROP-PROTECTOR Chiller. The Chiller is designed, based on extensive knowledge of safe and efficient crop storage. The Chiller is unique, high-quality and durable. We utilise an air flow capacity much higher than the competition....

The Chillers can be adapted to almost all types of silos and bulk storage warehouses. Normally the existing aeration system is used for the chilled air injection, so it is normally easy to connect the Chiller. In warehouses the air is distributed via a duct system that can be designed and installed to obtain the highest chilling efficiency for your needs. Each Chiller comes with a 4m iGRAIN Sensor Lance with two grain temperature and two grain moisture sensors. These enable a control loop to optimise the chilling efficiently with reduced risk of wetting the grain during the chilling...

Advanced and simple to use control system (HMI) The control system is centered around the 7” HMI touch panel PLC. It has a user friendly software and makes it esay to operate the Chiller. The user can select the operating mode from a menu with a few programs to match the need. Modes of operation Normal Cooling Mode: It automatically works toward the set target temperature. All control processes are adjusted by the PLC. The system capacity is regulated according to the required cooling. The evaporator fan and air flow rate automatically increase or decrease to achieve the desired condition...

CROP-PROTECTOR Chiller Grain cooling capacity estimated at outdoor temperature 20° C and 52% relative humidity. Daily grain cooling capacity may vary depending on the climatic conditions, the type of grain in the silo or other conditions. Compressor cooling capacity values calculated for 10° C evaporation and 45° C condensation temperatures. The values given are in case of two compressors. Determined in the purchase process. Power consumption estimated at nominal operating conditions. It may vary at different temperatures etc. Weight may vary depending on options selected.