Guangdong Leafy Green Cooperative: 35-Minute Pre-Cooling for 1.2 Ton Batches
A Guangdong agricultural cooperative cut field-to-cold-storage time from 8+ hours to 35 minutes using a CVF-1500A-4P vacuum pre-cooler, extending shelf life from 5–7 to 12–15 days.
The Challenge
A Guangdong agricultural cooperative processing 1,200 kg of leafy greens per cycle struggled with long cooling times. Romaine lettuce, spinach, and Chinese cabbage went from field at 28–32°C into cold storage, requiring 8–10 hours to reach core temperature. Shelf life was limited to 5–7 days.
The Solution
CVF-1500A-4P vacuum pre-cooler installed directly on the packhouse floor.
Results
| Parameter | Before | With Vacuum Pre-Cooling |
|---|---|---|
| Field to cold storage | 8–10 hours | 35 minutes |
| Core temp at loading | 28–32°C | 4–6°C |
| Cold storage energy | 100% baseline | 65% reduction |
| Shelf life | 5–7 days | 12–15 days |
| Weight loss | — | 1.8–2.5% |
Key Insight
For leafy greens, vacuum cooling is the fastest method available. The critical factor is packaging — perforated cartons or mesh bags allow vapor escape. Solid plastic bins trap moisture and reduce cooling efficiency.
Yuanxian Food Machinery — July 2026