Cold Chain Best Practices: Integrating Vacuum Pre-Cooling into Your Logistics
Step-by-step guide to adding vacuum pre-cooling at the farm or packhouse gate — reducing field heat, matching truck schedules, and maximizing throughput per shift.
The Critical Window
Field heat begins degrading produce quality the moment it is harvested. Every hour of delay in cooling reduces shelf life. Vacuum pre-cooling installed at the farm gate or packhouse entrance eliminates this delay.
Integration Workflow
Harvest → Trim/Grade → Crate → Vacuum Pre-Cool → Cold Storage → Refrigerated Transport
↑
30-40 min cycle
Capacity Planning
| Shift Hours | Cycles per Shift | Single 2-Pallet Unit | Single 6-Pallet Unit |
|---|---|---|---|
| 6 hours | 8–9 cycles | 8–9 tons | 24–27 tons |
| 8 hours | 10–12 cycles | 10–12 tons | 30–36 tons |
| 10 hours | 13–15 cycles | 13–15 tons | 39–45 tons |
Based on 30-min cycle + 5-min load/unload per batch.
Layout Considerations
- Position at the receiving dock, before cold storage entry
- Space 10–25 m² per unit, with 2m clearance around equipment
- Water evaporative models need 2–3 m³/day; water-cooled need 3–5 m³/h circulation
- Power 380V/50Hz/3P, breaker sized per model (150A–300A)
Operational Tips
- Stage crates — Pre-load produce onto pallets/trolleys before the unit is free
- Stagger cycles — With two units, load one while the other runs, achieving continuous throughput
- Match truck schedules — Schedule pre-cooling to finish 15 min before loading time
- Monitor core temperature — Use probe sensors, not surface readings
For more information contact sales@vacuum-fresh.com