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Industry guide

Produce Post-Harvest Cold Chain — Pre-Cooling & CA Storage Guide

Forced-air pre-cooling, hydro-cooling, vacuum-cooling and controlled-atmosphere storage for fresh produce exporters — reduce post-harvest losses.

Pre-cooling method by crop

Berries, stone fruit: forced-air (1–4 h). Leafy greens: vacuum (20–30 min). Carrots, sweetcorn: hydrocooling (10–30 min). Match method to product moisture tolerance and packaging.

Controlled-atmosphere (CA) storage

Apples, pears, kiwi: 1–3% O₂, 1–3% CO₂, 0–1 °C. Extends storage life 4–8 months vs regular air. Requires sealed rooms (≥3 minute Δp decay), N₂ generator, CO₂ scrubber.

Off-grid solar cold rooms

For farm-gate pre-cooling in emerging markets: 1–5 t capacity, solar PV + Li-ion or thermal storage, low-charge R290 or NH₃. Payback 3–5 years when displacing diesel or eliminating harvest loss.

Export chain integration

Design pre-cool, storage and reefer container loading as one flow. Delay in loading > 2 h at ambient wipes out 30–40% of pre-cool benefit. Loading dock canopies and reefer plug-in yards are cheap insurance.

Frequently asked

How much loss reduction does pre-cooling really deliver?

For berries and stone fruit: 12–22 percentage points fewer downgrades at retail. Payback often <2 years for exporters.

Is CA worth it for smaller volumes?

Break-even is typically 500–800 t/year per commodity. Below that, cold storage + air-freight (or shorter storage cycles) beats CA capex.

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Industry
agriculture
Temperature
0/+4 °C with humidity control
Budget
€1M – €15M
Timeline
8–14 months
Equipment
Pre-cooling tunnels, controlled-atmosphere rooms, ripening chambers
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