Tan Long is the industrial refrigeration contractor for the project AJ Total Vietnam in Long Hau Industrial Park, Tay Ninh Province (formerly Long An), working together across several phases from 2019 to 2024. The facility is a cold storage centre measuring approximately 153,5 × 58,9 × 52 m, with a capacity of around 30.700 pallet positions, combining a high-bay automated freezer store (Auto Freezer Storage) with 05 conventional cold rooms using Double Deep racking on the lower level, running on NH3 refrigeration systems center.
Project summary
| Client | AJ Total Vietnam Company Limited |
| Location | Long Hau Industrial Park, Tay Ninh Province (formerly Long An) |
| Year delivered | 2019 – 2021 (main system), 2023 and 2024 (additional works) |
| Industry | Cold storage for lease and cold chain logistics |
| Overall dimensions | Approximately 153.5 m × 58.9 m × 52 m |
| Capacity | Approximately 30,700 pallet positions |
| Store model | High-bay ASRS automated freezer store combined with conventional Double Deep cold rooms |
| Refrigerant | NH3 (R717), with an ethylene glycol loop for indirect loads |
| Tan Long scope | Refrigeration equipment, pressure vessels, NH3 and glycol pipework, insulation, cooling air distribution ducts, power and control systems, HMI/SCADA, operating instructions, as-built documentation and warranty |
Overview of the AJ Total Vietnam facility
AJ Total Vietnam invested in a cold storage centre at Long Hau Industrial Park to serve industrial-scale cold chain storage and logistics. What sets the facility apart is its hybrid model: an Auto Freezer Storage area running automatically on the upper level, and conventional cold rooms using Double Deep racking on the lower level.
Tan Long was the contractor supplying and installing the industrial refrigeration system for the project. The main system runs on NH3 and comprises 06 Mycom screw compressors, 05 evaporative condensers, 25 Güntner air coolers, 06 Teikoku NH3 liquid pumps, a Danfoss valve system, the pipework, pressure vessels, electrical controls and HMI/SCADA.
Capacity structure: automated store combined with conventional cold rooms
What sets the AJ Total facility apart is the hybrid cold storage model within a single centre: an automated freezer store operated by stacker cranes on the upper level, and cold rooms operated by forklifts on the lower level.
| Scope | Capacity | Note |
|---|---|---|
| The entire AJ Total Long Hau centre | Approximately 30,700 pallet positions | Per Tan Long's records. Public sources usually round this to about 31,000 pallets. |
| Auto Freezer Storage (automated store) | 25.100 pallets | Based on the refrigeration engineering data for the automated store. |
| 05 conventional rooms on the lower level | 5.765 pallet positions | Per the racking drawings: 05 Double Deep rooms, operated by forklift. |
Capacity of the 05 Double Deep rooms on the lower level
| Khu kho | Capacity |
|---|---|
| Warehouse 1 | 1.008 pallets |
| Warehouse 2 | 1.143 pallets |
| Warehouse 3 | 1.143 pallets |
| Warehouse 4 | 1.143 pallets |
| Warehouse 5 | 1.328 pallets |
| Total per the racking drawings | 5.765 pallets |
Auto Freezer Storage – the standout engineering element
The Auto Freezer Storage area is a freezer high-bay automated store in which pallets are moved from the handling area on the lower level up to the storage area by an automated conveying system and stacker cranes.
At over 40 m tall and roughly 169,000 m³ in volume, the challenge for the refrigeration contractor is not simply installing enough capacity, but distributing air flow across both the height and the length of the store without encroaching on the operating envelope of the racking and the automation equipment.
| Auto Freezer Storage specifications | Value |
|---|---|
| Size | 111.150 × 36.900 × 42.525 mm |
| Volume | 169.389,27 m³ |
| Capacity | 25.100 pallets |
| Design room temperature (Tf) | -25°C |
| Evaporating temperature (To) | -32°C |
| Cooling capacity | 515,2 kW |
| Refrigerant | NH3 (R717) |
Air duct solution for distributing cooling in a high-bay store
For the Auto Freezer Storage area, Tan Long installed air coolers combined with a 304 stainless steel spiral duct system and hot-dip galvanised steel support frames. Dedicated project drawings set out the duct and refrigeration pipework connections for the automated store.
This solution is harder than a conventional air cooler layout: the path of the cold air has to be controlled across a very tall space, cold air has to reach storage zones deep inside the racking, and clearance has to be maintained for the racking, the stacker cranes and the pallet handling equipment.
Central NH3 refrigeration system
AJ Total runs a single central NH3 refrigeration system serving every cooling load across the complex. The equipment configuration represents a complete industrial system — compressors, condensers, air coolers, liquid pumps, pressure vessels and glycol heat exchangers through to pipework, control valves and electrical automation.
| Category | Configuration | Role |
|---|---|---|
| Refrigeration compressor | 06 Mycom screw compressors | Generate cooling capacity for the central NH3 system. |
| Evaporative condenser | 05 units, stainless steel construction | Reject heat from the NH3 system. |
| Industrial Air Cooler | 25 Güntner air coolers | Serve the automated store, the freezer and chill rooms, the packing area, the chilled corridors and other loads. |
| NH3 liquid pumps | 06 Teikoku pumps | Circulate NH3 liquid to the air coolers. |
| Refrigeration valves and control devices | Danfoss | Isolate, regulate and protect the NH3 circuits. |
| Glycol heat exchange | 01 PHE Thermowave | Chills ethylene glycol for the loads in the loading and dispatch area. |
Pipework, pressure vessels and insulation
The NH3 pipework uses SCH40 standard steel pipe. Alongside the NH3 lines, the facility also has glycol lines, water lines, defrost drain lines and ancillary runs connecting the condensers, pressure vessels and machine room equipment.
The NH3, glycol and defrost drain runs are insulated with PU foam and clad in stainless steel. The pressure vessel operating at low temperature are likewise insulated with PU foam and clad in stainless steel. The system also includes a stainless steel ethylene glycol tank. The pressure vessels on the project were fabricated to order by Tan Long.
Power, control and monitoring
The refrigeration scope includes the power and control electrics, with control cabinet, PLC, HMI and SCADA monitoring. Operating signals from the compressors, pumps, valves and ancillary equipment are fed back to the control system so that status, temperature, pressure, liquid level and alarms can be monitored to the project configuration.
For a cold storage centre with multiple areas and several different load groups, centralised control and SCADA monitoring are what make stable operation and effective maintenance possible.
What Tan Long's scope covers
- Supply and installation of imported refrigeration equipment: compressors, condensers, air coolers, liquid pumps, valves and control devices.
- Supply of pressure vessels, NH3, glycol and water pipework systems, and ancillary materials.
- Insulation works for low-temperature pipework and pressure vessels.
- Delivery of the power, control, HMI and SCADA systems within the refrigeration scope.
- Installation of the cooling air distribution ducts for the high-bay automated store.
- Training the client's personnel to use and operate the system.
- Supply of as-built drawings and technical documentation, work management and supervision, and warranty under contract.
A multi-phase partnership with AJ Total
| Stage | Key work packages |
|---|---|
| 2019 – 2021 | Supply and installation of the main industrial refrigeration system for the AJ Total centre. |
| 2023 | Additional refrigeration for the chilled corridor and ante room: air coolers, pipework, control electrics, panels and PVC strip curtains. |
| 2024 | Additions and upgrades to insulation panel and cold storage door under a separate contract. |
Why AJ Total chose NH3 for this cold storage centre
For a cold storage centre of nearly 31,000 pallets running continuously, most of the lifecycle cost sits in electricity rather than in the initial capital outlay. That is why a central NH3 configuration was chosen for this facility:
- High efficiency in the -25°C freezer temperature range, which is exactly the operating range of the Auto Freezer Storage area, with 515.2 kW running almost continuously.
- A single machine room serving both the automated store and the conventional rooms, rather than investing in and maintaining two independent systems.
- An intermediate glycol loop for the loading and dispatch area, which keeps NH3 confined to the machine room and the main pipe runs, reducing risk in areas where people work continuously.
- No ozone depletion and no direct greenhouse effect, which suits the requirements of logistics customers handling export goods.
What the AJ Total project demonstrates about Tan Long's capability
- Delivering a central NH3 refrigeration system for a logistics store of tens of thousands of pallets.
- Experience with high-bay automated freezer stores, where cold air distribution and pipe routing have to be coordinated with the racking and the ASRS.
- Integrating several groups of industrial equipment — Mycom, Güntner, Teikoku, Danfoss, Thermowave — along with pressure vessels and pipework systems.
- Delivering refrigeration mechanics, electrics and controls, insulation, ductwork and commissioning together within the refrigeration scope.
- Experience on a project where an automated store and conventional rooms coexist within a single cold storage centre.
- Being entrusted by the client with additional works after the main system entered operation.
Frequently Asked Questions
Who was the refrigeration contractor for AJ Total Vietnam at Long Hau?
What is the storage capacity of the AJ Total Long Hau project?
Is AJ Total an automated or a conventional cold store?
What are the refrigeration specifications of AJ Total's automated store?
Which refrigerant does the AJ Total refrigeration system use?
Which refrigeration equipment did Tan Long use at AJ Total?
Which equipment on the project was manufactured in-house by Tan Long?
Did Tan Long also deliver the air distribution system for the automated store?
Did Tan Long carry out the PLC and SCADA work at AJ Total?
Can Tan Long deliver a similar project for another plant?
Need advice on a similar system?
If your business needs a cold storage contractor for an automated store or NH3 refrigeration systems for a logistics centre, please call 0933 357 058 (Mr. Thinh) or send a quotation request.
Related projects
- NECS – New Era Cold Storage, 102,642 pallet positions
- Nichirei TBA Logistics Vietnam – also at Long Hau Industrial Park
- Frescol Tuna Vietnam – 12,000 MT cold store
- Meito Vietnam
- View all projects delivered by Tan Long
Doanh Nghiệp Đang Chuẩn Bị Triển Khai Dự Án Kho Lạnh Quy Mô Công Nghiệp?
Tân Long cung cấp giải pháp tổng thể chìa khóa trao tay: Từ tư vấn quy hoạch tổng mặt bằng, thiết kế tải lạnh, cung ứng vỏ panel PIR chống cháy B1/B2, hệ thống cụm máy nén Mycom/Bitzer, dàn bay hơi Guntner đến tự động hóa thông minh ASRS và bảo dưỡng 24/7 toàn quốc.
Kỹ sư Nguyễn Toàn Thịnh (Giám đốc Kỹ thuật)
Hơn 18 năm kinh nghiệm thực chiến chỉ đạo tư vấn thiết kế và thi công hệ thống lạnh công nghiệp nặng, kho tự động ASRS và cấp đông IQF qua hơn 29 đại dự án quốc gia.
