The pinnacle of cold logistics distribution center automation technology (AS/RS): Lineage Logistics is the No. 1 cold supply chain management corporation on the planet. The project at Song Hau Industrial Park is the largest cold logistics center in the Mekong Delta, serving the transshipment of imported and exported aquatic and agricultural products on international maritime routes.
1. Engineering Challenges of 28-Meter Ultra High-Bay Cold Storage
- Huge vertical load: With a static height of 28 meters and a capacity of 25,000 pallets (equivalent to 30,000 tons of goods), foundation and concrete floor pressure requires deep bored pile technology and Jointless Slab concrete pouring technique.
- Thermal Stratification Risk: In a space 28m high, cold air tends to sink to the bottom and warm air accumulates at the top of the ceiling. Tan Long has applied fluid dynamics simulation (CFD Analysis) to arrange a network of convection fans and stratified indoor units, ensuring the temperature difference between the floor and ceiling is no more than 0.8°C.
- Strict fire protection requirements according to FM Global standards: 100% of warehouse shells use B1 fireproof PIR panel combined with an automatic fire extinguishing system with a highly sensitive water barrier.
2. Breakthrough Structural & Thermal Engineering by Tan Long
- Dual safety automatic NH3 refrigeration station system: Mycom screw compressor cluster integrates an emergency safety valve system, multi-point NH3 gas leak sensor and 304 stainless steel evaporative condenser system located on the technical roof.
- Smart Airlock import/export buffer room: 12 dock import/export doors equipped with a 2-layer door system: T-Light sliding door and PVC quick rolling door, combined with an airbag cover to cover the truck container body.
- Integrated smart energy management SCADA system: Automatically adjusts load according to peak and off-peak electricity tariffs, see details at optimizing industrial cold storage electricity.
3. Pressure Equalization & Air Convection Management in 28m High-Bay
Cold storage with a ceiling height of up to 28 meters poses extremely harsh challenges in terms of temperature stratification and Stack Effect:
- Temperature gradient between ceiling and floor: In conventional cold storages, warm air tends to rise, causing the temperature on the top shelves to increase from 3°C to 5°C. Tan Long has designed a stratified forced circulation fan system (Destratification Fans) that pushes cold air continuously, maintaining the temperature fluctuation across the entire 28m height not exceeding ±0.8°C.
- Automatic pressure balancing valve system (Pressure Relief Vents): When the warehouse temperature drops from ambient temperature to -25°C, the air inside the warehouse contracts, creating a large vacuum, exerting tens of tons of pressure on the panel walls. Tan Long arranges pressure balancing valve assemblies with anti-freezing heating resistors, protecting the warehouse shell structure with absolute safety.
4. Operational Energy Metrics Achieved at Lineage Logistics
| Measurement Parameters | Original Design Standards | Actual Operation Results After 1 Year | Level Exceeds Standards |
|---|---|---|---|
| Average power consumption | ≤ 38 kWh/m³/year | 29.4 kWh/m³/year | Saves over 22.6% of electricity |
| Storage room temperature fluctuation | ±1.5°C | ±0.6°C (always -25.0°C) | Meets strict preservation standards of the global supply chain |
| Average cooling unit defrost time | 45 minutes/cycle | 22 minutes/cycle | Thanks to defrost technology with hot gas recovery |
| Cold conservation coefficient after 12-hour power outage | Temperature increase < 3°C | The temperature only increased by 1.1°C in 12 hours | Thanks to 200mm high-pressure molded PIR panels manufactured at Duc Hoa facility.5rem;">
Technical FAQs on the Project Lineage Logistics1. How does a 28-meter automated AS/RS high-bay racking system operate reliably at -25°C?Crane / Stacker robot uses hydraulic oil and specialized deep-seated lubricants that can withstand temperatures up to -40°C. All electrical cables and optical laser sensors have an automatic heating system to prevent frost build-up.
2. What active NH3 safety containment systems are implemented for a 30,000-ton cold storage complex?Tan Long installed a multi-zone NH3 leak sensor system connecting an automatic emergency shut-off valve, an IP65 explosion-proof ventilation fan and an NH3 absorption tower with a high-pressure water screen that meets IIAR US safety standards.
TECHNICAL EXPERT VERIFICATION
Eng. Nguyen Van LongEPC Technical Director & Head of Refrigeration Solutions, Tan Long 20+ years EPC experience in industrial cold storage systems, IQF quick freezers, and automated ASRS facilities. Thermal Engineering alumnus from HCMC University of Technology, VISRAE Executive Board member. 
TECHNICAL VERIFICATION
M.Sc. Tran Dinh HungPressure Vessel Safety Verification & Energy Auditing Lead 15+ years leading NH3 piping pressure safety proofing, COP energy audits, and fire protection certification for PIR/PU panel enclosures under QCVN 06:2022/BXD. |