Haocool 14,500m³ Comprehensive Bonded Zone Cold Storage EPC Case (Wuhu Anhui Xiangwei Supply Chain)

Project Overview

This full turnkey 14,500m³ constant temperature bonded cold storage is located in Wuhu Comprehensive Bonded Zone, customized for Anhui Xiangwei Supply Chain, an integrated import & export logistics enterprise covering customs clearance, bonded warehousing and cross-border distribution.

Warehouse core storage goods: imported precision auto electronic parts, semiconductor components, low-temperature packaged food, sensitive biochemical raw materials.
Wuhu belongs to Yangtze River subtropical humid climate, annual plum rain season with average ambient RH over 85%, high dew point easy to cause metal oxidation and packaging mildew; this project adopts full vapor barrier + large rotary dehumidifier exclusive design to meet customs supervision and goods anti-corrosion requirements.

Core Basic Project Data

• Total effective volume: 14,500 m³ | Floor area: 2,900 ㎡ | Net height: 5 m
• Standard storage tonnage: 3,300 tons (calculated by GB 50072 0.62 space utilization coefficient)
• Constant temperature zone: 0℃ ~ +5℃, controlled RH ≤65% (precision fluctuation ±3%RH)
• Total construction cycle: 60 calendar days fast-track EPC delivery
• Compliance certification: Customs designated supervision site acceptance, GB 50072 fire & insulation standard, NB/T 10771 dehumidification design specification

Pre-Construction Operational & Compliance Pain Points

1. Original scattered small cold rooms without bonded supervision partition, lack independent unqualified goods isolation area, failed annual customs on-site inspection twice;
2. Ordinary warehouse without professional dehumidification system, plum rain season internal dew condensation, electronic parts oxidation scrap rate up to 8.7%;
3. Single refrigeration unit without standby equipment, power failure risk leads to full batch high-value electronic component loss;
4. Old monitoring system cannot connect customs single window, temperature & cargo trace data cannot be uploaded for filing;
5. Thin single-layer insulation without complete vapor barrier, annual refrigeration power consumption extremely high.

1 High-Humidity Exclusive Envelope & Floor Anti-Condensation System (Yangtze River Plum Rain Adapted)

Comply with NB/T 10771 dehumidification standard, solve long-term high dew point condensation hidden danger in Wuhu area:

Structural Component	Standard Configuration & Anti-Moist Design	Mandatory Standard
Wall & Ceiling PU Panel	100mm B1 flame retardant PUR, density 40±2kg/m³, double-layer HDPE full vapor barrier laid on warm side	Block water vapor penetration from high-humidity outdoor air
Floor Insulation	Double staggered 50mm XPS extruded board + integral waterproof base, compressive strength ≥300kPa	Prevent ground moisture upward seepage
Cold Door & Airtight Access	Stainless steel automatic sliding door + full stainless air curtain with anti-condensation heating strip	Cut hot humid air inflow during loading
All Joint Treatment	Closed-cell low-temperature anti-mildew sealing glue for wall-column, pipeline penetration holes	Eliminate cold bridge & moisture leakage gaps

Core optimization: All metal suspension brackets fitted nylon thermal insulation gaskets to avoid local wall sweating.

2 Redundant Refrigeration System For High-Value Bonded Goods

Adopt Italy Frascold semi-hermetic compressor one-main-one-standby parallel unit, adapt Wuhu summer 37℃ peak ambient temperature:
1. Unit matching: Two sets of independent refrigeration loops, automatic standby switching within 10s after main machine fault;
2. Evaporator: Low wind speed ceiling air coolers to avoid surface dehydration of electronic packaging;
3. Defrost mode: Hot gas circulation defrost without electric heating ignition source, meet bonded warehouse fire control requirements;
4. Power guarantee: Independent UPS power supply for monitoring & dehumidifier, sustain 72h stable temperature record during municipal power outage.

3 Custom Rotary Dehumidification System (Core High-Humidity Solution)

Equipment Parameter

39.6kg/h industrial rotary dehumidifier, interlocked with PLC temperature control platform, automatic startup when RH exceeds 65%.

Working Logic

1. Pre-dehumidify incoming hot humid air before entering buffer hall;
2. Real-time linkage with warehouse humidity sensor, dynamically adjust air volume;
3. Maintain long-term stable 60–65% RH inside warehouse, eliminate electronic part oxidation risk caused by high humidity.

4 Customs Supervision Compliant Intelligent Control & WMS System

Meet General Administration of Customs supervision data filing requirements, realize one-stop data interconnection:
1. Core Hardware: Siemens main PLC + Kunlun Tongtai touch screen, CHNT full low-humidity resistant electrical components;

2 Customs Mandatory Monitoring Functions:

• Full coverage 24h HD surveillance camera, video data stored ≥90 days for customs spot check;
• Multi-point temperature sensors (1 set per 150m³), temperature fluctuation strictly controlled ≤±0.5℃;
• 5-year non-editable storage data, support one-click export & upload to customs single window platform;
• Three independent partition access authority: warehouse operator, customs inspector, enterprise admin;

3. Supporting Logistics System: Separate customs inspection buffer hall, independent qualified / pending inspection / unqualified goods isolation three zones to avoid cross-contamination of bonded goods.

5 Measurable Post-Operation Benefits After 1 Year Stable Operation

1. Pass customs bonded supervision site acceptance at one time, no rectification records in two annual inspections;
2. Warehouse internal condensation completely eliminated, electronic parts oxidation scrap rate reduced from 8.7% down to below 1.2%;
3. One-main-one-standby unit + full insulation energy-saving design cut annual refrigeration power consumption by 22%;
4. 60-day fast construction cycle advance warehouse operation, annual import & export cargo turnover increased by 36%;
5. WMS & customs single window automatic docking cut manual declaration labor cost by 58%.

6 6 Common Bonded Cold Storage Customs Inspection Pitfalls

1. No independent unqualified goods isolation area → Direct customs inspection failure
2. Monitoring video storage less than 90 days → Mandatory rectification within 15 working days
3. Omit full continuous vapor barrier → Plum rain season mass wall condensation & goods damage
4. Single compressor without standby unit → High-value bonded goods loss risk during equipment breakdown
5. WMS system cannot connect customs single window → Unable to complete daily cargo filing
6. No special dehumidification equipment for subtropical humid zones → Electronic parts batch oxidation scrap

7 FAQ For Comprehensive Bonded Zone Supply Chain Enterprises

Q1 What’s the core difference between bonded cold storage and ordinary commercial cold room?

Bonded warehouse must set three independent supervision partitions, full coverage 90-day video monitoring, data interconnection with customs single window, and high-humidity area needs matched rotary dehumidifier to protect import electronic goods.

Q2 Why must Wuhu bonded warehouse equip large rotary dehumidifier?

Wuhu plum rain season outdoor RH often exceeds 85%, ordinary cold storage cannot control humidity below 65%; high humidity will cause metal electronic parts oxidation and packaging mildew.

Q3 What power backup standard is required for bonded cold storage?

Independent UPS for monitoring and dehumidification system, ensure temperature data can be recorded continuously for more than 72 hours under full power outage.

Q4 How many tons of bonded goods can 14,500m³ warehouse store?

Calculated per GB 50072 space utilization coefficient 0.62, standard pallet mixed electronic & food goods storage capacity reaches 3,300 tons.

Custom Bonded Cold Storage Inquiry

If you plan to build customs compliant constant temperature cold warehouse in Yangtze River Delta high-humidity comprehensive bonded zones, provide warehouse volume and main imported goods types to get free layout drawing & customs acceptance complete document list.

Construction & Completion Photos