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Grapes

Recommended

Conventional cooling

Dynamic Cooling

Pre-cooling

De-greening

Ripening

General Tips for Grapes

Storage temperatureRelative Humidity (RH)DurationPre-coolingSensitivity to ethyleneEthylene ProductionControlled Atmosphere
Storage temperature: -0,5° έως 0° C
Relative Humidity (RH): 90%-92%
Duration: 4-10 weeks
Pre-cooling: Air cooling
Sensitivity to ethylene: Low
Ethylene Production: Very low
Controlled Atmosphere: Not recommended

Storage Temperature: Recommended storage temperature is 0 °C.

High Humidity: Use an air cooler with a low temperature differential (ΔT) between inlet and outlet air.

Storage Duration: Recommended period is between 1 and 3 weeks.

Controlled Atmosphere: Not recommended, as the storage time extension is limited relative to the total shelf life.

Ozone: Installation of an ozone-generation system is recommended to reduce microbial load.

Ventilation: A digitally controlled ventilation system should be installed following a specialized design study.

IMPORTANT TIPS
  • Grapes intended for immediate packing should be stored below 10 °C in a reinforced cold-storage chamber.
  • Grapes placed in field crates for storage should be pre-cooled at 2 °C with open bags to ensure proper airflow.
  • Grapes ready for shipment should undergo pre-cooling at 0 °C – 1 °C in high-capacity pre-coolers.
  • Maintain uniform temperature within all storage chambers.
  • The use of Dynamic Cooling is highly recommended for consistent temperature regulation.
  • The surfaces of air coolers should be coated with protective material when sulfur-based preservatives are used.
  • Use approved sulfur dioxide applications to protect grapes from fungal infections.
  • Maintain medium CO₂ concentrations to help preserve fruit quality.
  • Avoid storing grapes after rainfall, as excess moisture accelerates spoilage.