果蔬保鲜冷库设计方案与温湿度参数全表

(English version)

Two "fruit and vegetable cold stores" can have almost nothing in common. Yantai apples are stored near their freezing point at low air velocity for months; Hainan bananas suffer chilling injury below roughly 9–10 °C, showing skin browning and losing the ability to ripen properly. Defining the product mix is step one of design.

This guide walks through the logic in order: set the parameters, then the envelope, then the equipment.

1. Lock the temperature targets by product

Harvested produce continues to respire, transpire and release ethylene; temperature governs the rate of all three. The national standard Service Specification for Fruit and Vegetable Cold Chain Logistics lists recommended pre-cooling and storage conditions in its annex. Combined with field practice:

Fruits

Vegetables

A room holding multiple products must be zoned; otherwise the most sensitive item dictates setpoints and you waste energy on everything else.

2. Envelope and layout

• Site and orientation: avoid heat sources and solar exposure; shelter the loading dock from prevailing wind.
• Ceiling height: set by stacking height plus air duct and cooler clearance. Extra height buys storage you cannot use and refrigeration you must pay for.
• Insulation: around 0 °C, 100 mm or 150 mm PUF sandwich panels are typical; specify density and fire-retardant grade in the contract.
• Floor: insulated, frost-heave protected, sloped for defrost water drainage.
• Zoning: separate pre-cooling area, sorting/packing area and finished-product store, with one-way product flow.

3. Refrigeration and auxiliaries

• Honest load calculation: intake volume, incoming temperature, loading frequency and packaging together define peak load. Rules of thumb are for budget screening only — a formal hourly load study is mandatory.
• Compressor rack: multi-compressor parallel racks or inverter units excel at the partial-load duty that fresh-keeping rooms run most of the year; keep evaporating temperature close to room temperature (ΔT ≈ 6–8 K) to limit dehydration.
• Air coolers: for near-0 °C duty choose DL-type units with ~4.5 mm fin spacing, high airflow and low noise; in long rooms mount them diagonally opposite to eliminate dead spots. See Air Cooler Selection Guide.
• Humidification: ultrasonic or high-pressure mist for leafy greens and berries to hold RH above 95%.
• Controls: automatic logging, remote alarms and retrievable history — these score points during buyer audits.

4. Four operating habits that control shrink

1. Pre-cool: remove field heat before loading; start within 24 hours of harvest.
2. Limit daily intake: set a maximum daily loading quota — exceeding it leaves the room unable to recover temperature quickly.
3. Stacking discipline: ventilated crates, ≥20 cm from walls, ≥30 cm from ceiling, air flues between stacks, strict FIFO.
4. Defrost discipline: defrost when a white frost layer appears but before it blocks airflow; extend intervals once temperature stabilises. Needless heating only swings the room temperature and makes produce sweat.

Shandong BRT Refrigeration Equipment Co., Ltd. (山东博瑞特制冷设备有限公司) specialises in cold-storage design, refrigeration equipment supply, installation and after-sales service. Founded in 2013 with 1,000+ completed projects across fresh-keeping, CA, freezer, pharmaceutical and industrial stores, we provide free layout plans and equipment schedules matched to your product mix and throughput.

Website: https://www.sdbrt.com　|　Tel / WhatsApp: +86 15898896999

Parameters compiled from the annexes of the national standard Service Specification for Fruit and Vegetable Cold Chain Logistics and common industry practice; final values follow the approved design documents.